(19)
(11)EP 3 418 035 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
06.05.2020 Bulletin 2020/19

(21)Application number: 17188923.1

(22)Date of filing:  01.09.2017
(51)International Patent Classification (IPC): 
B29C 65/02(2006.01)
B29C 65/78(2006.01)
B65B 51/14(2006.01)
B29C 65/74(2006.01)
B65B 31/04(2006.01)

(54)

HOUSEHOLD VACUUM SEALER AND BAG-CUTTING SEALING METHOD

HAUSHALTSVAKUUMSIEGELVORRICHTUNG UND BEUTELSCHNEID- UND SIEGELVERFAHREN

DISPOSITIF DOMESTIQUE DE SCELLAGE SOUS VIDE ET PROCÉDÉ DE SCELLAGE ET DE DÉCOUPE DE SACS


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 21.06.2017 CN 201720723897 U
21.06.2017 CN 201710474003

(43)Date of publication of application:
26.12.2018 Bulletin 2018/52

(73)Proprietor: Bonsen Electronics Limited
San Tun Community Hou Jie Town Dong Guan City Guangdong 523941 (CN)

(72)Inventors:
  • XU, Ning
    Dong Guan City, Guangdong 523941 (CN)
  • LI, QinCan
    Dong Guan City, Guangdong 523941 (CN)
  • ZHU, Xingbing
    Dong Guan City, Guangdong 523941 (CN)
  • PENG, Haibo
    Dong Guan City, Guangdong 523941 (CN)

(74)Representative: Bandpay & Greuter 
30, rue Notre-Dame des Victoires
75002 Paris
75002 Paris (FR)


(56)References cited: : 
EP-A1- 3 009 255
US-A1- 2005 108 990
WO-A2-2013/002581
US-A1- 2013 097 967
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    TECHNICAL FIELD



    [0001] The present invention relates to the technical field of household vacuum sealers, and in particular, to a household vacuum sealer and a bag-cutting sealing method thereof.

    BACKGROUND



    [0002] A household vacuum sealer is provided with an upper hood and a lower hood equipped with an evacuative groove. In the case of evacuation, an opening of a vacuum packaging bag is inserted into the evacuative groove, then the vacuum packaging bag is evacuated through the evacuative groove after a vacuum pump communicating with the evacuative groove is started, and finally the opening of the vacuum packaging bag is heat sealed by a heat-seal bar of the lower hood.

    [0003] In the case of evacuating a vacuum packaging bag roll, in order for a user to cut the bags conveniently, a cutter box and a sliding cutter are usually mounted at a top surface of the upper hood of the household vacuum sealer. As shown in the Chinese patent No. 201020127855.8 entitled "plastic bag sealer" and the Chinese patent No. 201120209473.4, entitled "household vacuum sealer with improved cutting device", the vacuum packaging bag used in the household vacuum sealer is a bag roll with two sealed sides. Therefore, in use, it is necessary to firstly cut off a bag, and then to heat seal the two ends of the bag by the heat-seal bar of the household vacuum sealer to form a vacuum packaging bag. Both the upper hood and the lower hood are provided with heat-seal bars, which is complex in structure and high in cost. EP 3009255 A1 discloses a vacuum packaging and sealing appliance. EP 3009255 A1 also discloses a bag-cutting sealing method of a household vacuum sealer, comprising the following steps of:
    1. 1) fixing a vacuum packaging bag roll at a shaft, mounting two end portions of the shaft in a shaft mounting cavity at two sides of the household vacuum sealer, such that the vacuum packaging bag roll is received in a bag receiving chamber of the household vacuum sealer;
    2. 2) pulling the vacuum packaging bag roll by an appropriate length out of the household vacuum sealer with the bag stretching across a top surface of a lower hood, locating the bag to be cut off in an evacuative groove which is arranged on the lower hood and configured to evacuate; in pulling out the bag, the shaft goes after to rotate;
    3. 3) keeping the pulled-out bag still and locking an upper hood, pressing tightly the bag by the upper hood locked onto the lower hood;
    4. 4) cutting off the bag: sliding the cutter device mounted on the upper hood from one side to the other side, cutting off the tensioned bag by a cutter of the cutter device which protrudes from a bottom surface of the upper hood and is located at the side of the evacuative groove;
    5. 5) heat sealing the bag: heat sealing the end portion of the bag by a heat-seal bar which is mounted on the lower hood, is located at the side of the evacuative groove and is configured to heat seal after evacuation; this step is set to be conducted automatically after the upper hood is locked or to be conducted after the user touches the corresponding control key;
    6. 6) opening the upper hood;
    7. 7) taking out the cut-off bag to finish the heat-sealing of the end portion of the bag.


    [0004] The above-mentioned household vacuum sealer is cumbersome to use since the bag roll needs to be moved to the cutter box at the top surface of the upper hood firstly, a front end portion of the bag of the vacuum packaging bag roll is penetrated through or pressed tightly on the cutter box at the top surface of the upper hood, the bag is cut off by the sliding cutter, then the cut-off bag is transferred to the evacuative groove, the one end portion thereof is heat sealed to form a bag to put food therein, and the other end portion is inserted into the evacuative groove to be evacuated and heat sealed after the food is put inside.

    [0005] As for a vacuum packaging machine with an inner receiving cavity where a vacuum packaging bag roll is placed, in the case of cutting off the bag, the bag placed in the receiving cavity of the household vacuum sealer needs to be pulled out by a longer length, the bag may be pulled to the cutter to be cut off only if the length of the pulled-out bag is certainly much larger than that of the cut-off bag, then the remaining bags have to be rolled back manually, such that they are retractable into the bag receiving cavity, the one end portion of the bag is transferred to the evacuative groove, and the one end portion is heat sealed, which is inconvenient to use. Therefore, it needs to make improvements.

    SUMMARY



    [0006] In view of the defects in the prior art, the present invention has an objective to provide a bag-cutting sealing method of a household vacuum sealer, which has reduced number of operation steps for the user, and exhibits ease and quickness of operation.

    [0007] In order to achieve the above objective, the technical solution of the present invention is as follows. A bag-cutting sealing method of a household vacuum sealer includes the following steps of:
    1. 1) fixing a vacuum packaging bag roll at an automatic rollback shaft, mounting two end portions of the automatic rollback shaft in a shaft mounting cavity at two sides of the household vacuum sealer, such that the vacuum packaging bag roll is received in a bag receiving chamber of the household vacuum sealer;
    2. 2) pulling the vacuum packaging bag roll by an appropriate length out of the household vacuum sealer with the bag stretching across a top surface of a hood, locating the bag to be cut off in an evacuative groove which is arranged on a lower hood and configured to evacuate; in pulling out the bag, the automatic rollback shaft goes after to rotate, and part of a torsion generated in the rotation of the automatic rollback shaft is transmitted to an elastic energy storage element in an elastic rollback mechanism by means of the elastic rollback mechanism mounted at an end portion of the automatic rollback shaft, such that the elastic rollback mechanism exerts an acting force to the automatic rollback shaft for realizing its reverse rotation; locking the automatic rollback shaft to prevent its reverse rotation by an unidirectional rotation limiting latch installed on the lower hood;
    3. 3) keeping the pulled-out bag still and locking an upper hood, pressing tightly the bag by the upper hood locked onto the lower hood, abutting the unidirectional rotation limiting latch mounted on the lower hood by an unlocking rod fixed on the upper hood, such that the unidirectional rotation limiting latch unlocks the automatic rollback shaft which reversely rotates and strains the bag due to the torsion of the elastic rollback mechanism, so as to tension the bag at the top surface of the lower hood;
    4. 4) cutting off the bag: sliding the cutter device mounted on the upper hood from one side to the other side, cutting off the tensioned bag by a cutter of the cutter device which protrudes from a bottom surface of the upper hood and is located at the side of the evacuative groove, the automatic rollback shaft reversely rotating due to the torsion of the elastic rollback mechanism, and automatically rolling the cut-off bag outside the bag receiving chamber back onto the vacuum packaging bag roll in the bag receiving chamber;
    5. 5) heat sealing the bag: heat sealing the end portion of the bag by a heat-seal bar which is mounted on the lower hood, is located at the side of the evacuative groove and is configured to heat seal after evacuation; this step is set to be conducted automatically after the upper hood is locked or to be conducted after the user touches the corresponding control key;
    6. 6) opening the upper hood, the unlocking rod of the upper hood releasing from the unidirectional rotation limiting latch with the rotation of the upper hood, the elastic unidirectional locking mechanism resetting and locking the automatic rollback shaft;
    7. 7) taking out the cut-off bag to finish the heat-sealing of the end portion of the bag.


    [0008] In view of the defects in the prior art, the present invention has an objective to provide a household vacuum sealer able to automatically roll back bags after the bag is cut off, which has reduced number of operation steps for the user, and exhibits ease of operation.

    [0009] In order to achieve the above objective, the present invention adopts the following technical solution. A household vacuum sealer includes an upper hood, a lower hood and a cutter device, wherein the upper hood is rotatably mounted on the lower hood, at least one cutter device is slidably mounted on the upper hood, at least one heat-seal bar and at least one evacuative groove are arranged at the upper portion of the lower hood, the upper hood and/or the lower hood is provided with a bag receiving chamber, at least one pushing portion is arranged at the upper portion of the cutter device, at least one cutter is arranged at its lower portion; at least one sliding groove is disposed at a top surface or a front end surface of the upper hood, the pushing portion is slidably mounted in the sliding groove; the cutter protrudes from the bottom surface of the lower hood at least upon cutting the bag; after the upper hood is locked onto the lower hood, the cutter moves at one side of the heat-seal bar or one side of the evacuative groove back and forth, for cutting off the bag pressed tightly between the upper hood and the lower hood.

    [0010] In a further solution, the top half of the cutter device is slidably mounted in the front end portion of the upper hood, the lower portion of the cutter device protrudes from the bottom surface at the front end portion of the lower hood at least upon cutting the bag; the pushing portion protrudes from the top surface or the front end surface of the upper hood;

    [0011] the cutter device and the cutter are kept protruding from the bottom surface of the lower hood all the time; or the cutter device and the cutter protrude from the bottom surface of the lower hood only upon cutting the bag;

    [0012] the cutter device or the pushing portion drives the cutter to eject downwards due to an external force or a switching mechanism.

    [0013] In a further solution, a belt is mounted inside the front end portion of the upper hood; at least one sliding portion is slidably mounted at the top surface or front end surface of the front end portion of the upper hood, for driving the belt to move back and forth; an inner end portion of the pushing portion is fixed to the belt; the cutter device is fixed to the belt which drives the cutter device to move back and forth upon moving back and forth.

    [0014] In a further solution, the cutter device includes a cutter box and a cutter, wherein the cutter includes at least one blade, one side of the blade has one cutting edge facing toward an outer side, and the cutting edges of the two blades incline.

    [0015] In a further solution, the cutter includes two blades, each of which is formed by breaking off a blade of a box cutter along its fold; the two blades are fixed at the left and right sides of the cutter box respectively, and the cutting edges of the two blades face towards the outer side respectively, and are arranged in a "V" shape.

    [0016] In a further solution, a hook portion is formed at the lower portion of the cutter box, the middle of the hook portion is connected to the cutter box, two bag putting notches are formed at the left and right sides over the hook portion respectively, and the cutting edges of the two blades protrude in the bag putting notch respectively.

    [0017] In a further solution, a clearance groove is arranged on the lower hood. After the upper hood is locked onto the lower hood, the hook portion is inserted into the clearance groove and slides in the clearance groove back and forth, and the bag pressed tightly between the upper hood and the lower hood is located in an opening of the bag putting notch in a height direction;

    [0018] the cutting edge is located at an inner end portion of the bag putting notch, and an acute angle is formed between the inclining cutting edge and the bottom surface of the bag putting notch.

    [0019] In a further solution, a limiting sliding groove is arranged at the bottom surface of the upper hood, and is parallel with the heat-seal bar or the evacuative groove, several transmission studs are mounted in the upper hood, the annular belt is tensioned into a square shape by the transmission studs, the part of the belt close to the outer end surface of the upper cover is a driving belt body, the part of the belt away from the outer end surface of the upper cover is a driven belt body, the pushing portion is fixed to the driving belt body, the cutter device is fixed at a driven belt body which slides in the limiting sliding groove back and forth together with the cutter device.

    [0020] According to the invention, a rear end portion of the upper hood is rotatably mounted at a rear end portion of the lower hood, the heat-seal bar and the evacuative groove are arranged at a top surface of the front end portion of the lower hood, the heat-seal bar and the evacuative groove are arranged alternately in parallel and extend along a length direction of the lower hood, the bag receiving chamber is disposed at the top surface of the rear end portion of the lower hood, the left and right end portions of the bag receiving chamber are provided with a shaft mounting cavity respectively; a detachable automatic rollback shaft is rotatably mounted in the bag receiving chamber, for passing through a shaft cavity in the middle of the vacuum packaging bag roll, the left and right end portions of the automatic rollback shaft are movably placed in the left and right shaft mounting cavities respectively; the elastic rollback mechanism for automatically rolling the rollback shaft back and the elastic unidirectional locking mechanism for locking the automatic rollback shaft are mounted at the end portion of the automatic rollback shaft.

    [0021] In a further solution, the elastic unidirectional locking mechanism includes a driving wheel, a unidirectional rotation limiting latch and an unlocking rod for changing the state of the unidirectional rotation limiting latch, wherein the driving wheel is fixed at a first end portion of the automatic rollback shaft, the unidirectional rotation limiting latch is movably mounted on the lower hood, and is elastically abutted against the driving wheel for enabling only the unidirectional rotation of the automatic rollback shaft and rolling out the bag; the unlocking rod is fixed on the upper hood, and touches the unidirectional rotation limiting latch after the upper hood is locked onto the lower hood, to unlock the driving wheel by the unidirectional rotation limiting latch.

    [0022] In a further solution, a latch chamber is arranged on the lower hood, the upper portion of the latch chamber communicates with that of the shaft mounting cavity for receiving the first end portion of the automatic rollback shaft; the unidirectional rotation limiting latch is rotatably mounted in the latch chamber, the front end portion of the unidirectional rotation limiting latch passes through the upper portion of the latch chamber to extend into its adjacent shaft mounting cavity; a spring is mounted in the latch chamber, and is connected with the unidirectional rotation limiting latch, for exerting an elastic force to the unidirectional rotation limiting latch such that it elastically abuts against the driving wheel.

    [0023] In a further solution, several hook teeth are formed at the wheel body or surface of the driving wheel in a circumferential direction;

    [0024] a latch hook is formed at a first side of the unidirectional rotation limiting latch, an unlocking driving portion is formed at its second side, a driving slot is formed on the unlocking driving portion, the middle of the unidirectional rotation limiting latch is pivotably connected to the lower hood, the latch hook passes through the upper portion of the latch chamber and extends into its adjacent shaft mounting cavity, the latch hook is elastically abutted against the hook teeth of the driving wheel, the lower end of the spring is mounted to the bottom of the latch chamber, and its upper end is connected to the unlocking driving portion, for exerting an upward elastic force to the unlocking driving portion; after the upper hood is locked onto the lower hood, the unlocking rod is inserted into the driving slot, for driving the latch hook to move upwards and release from the hook teeth, so as to unlock the driving wheel by the unidirectional rotation limiting latch.

    [0025] In a further solution, the elastic rollback mechanism includes an end cap, an elastic energy storage element and an inner cap component, wherein an embedding chamber is arranged at a second end portion of the automatic rollback shaft, an inner cap component is fixed in the embedding chamber; the end cap is rotatably mounted at the inner cap component, the end cap protrudes from a second end portion of the automatic rollback shaft, and the end cap is movably snapped in the shaft mounting cavity for receiving the second end portion of the automatic rollback shaft, the first end of the elastic energy storage element is connected with the inner cap component, and the second end thereof is connected with the end cap; the inner cap component includes an inner cap, a middle cap and a torsion transmitting element, wherein a torsion chamber is arranged at one side of the inner cap, the torsion transmitting element is rotatably mounted into the torsion chamber, several recesses are formed at an inner wall surface of the torsion chamber in a circumferential direction, a shaft hole is arranged in the middle of the inner cap; a torsion shaft protrudes from one side of the torsion transmitting element towards the end cap, the torsion shaft is rotatably mounted to the shaft hole of the inner cap, an outer end portion of the torsion shaft passes through the shaft hole, and is connected to the first end of the elastic energy storage element; at least two elastic clamping arms extend out of the torsion transmitting element in a radial direction, a projection is formed at an outer end portion of the elastic clamping arm, and is elastically abutted in the recess at the inner wall surface of the torsion chamber; the first side of the middle cap is fixed to the inner cap, the inner end portion of the end cap is rotatably mounted to the middle cap which is provided with an energy storage cavity in the middle, the elastic energy storage element is located in the energy storage cavity and is selected from one of elastic steel wire, torsional spring, spiral spring or shrapnel.

    [0026] A through hole is arranged in the middle of the middle cap, and is less than the energy storage cavity. A snap ring is formed at a connected surface between the through hole and the energy storage cavity, several buckling feet are formed at one side of the end cap towards the middle cap, each buckling foot passes through the through hole and is movably buckled to the snap ring respectively, and an outer side surface of each buckling foot has an arc surface with the same radius, and an outer side surface of each buckling foot is rotatably matched with the through hole;

    [0027] the projection and the recess have a stationary fit status and a tripping fit status.

    [0028] In the case that the elastic force of the elastic energy storage element is less than a friction force between the projection and the recess, the projection and the recess are in a stationary fit status, the automatic rollback shaft drives the inner cap, the elastic clamping arm and the torsion shaft to rotate upon rotating, and the elastic energy storage element is in a state of energy storage upon the rotation of the torsion shaft;

    [0029] in the case that the elastic force of the elastic energy storage element is larger than the friction force between the projection and the recess, the projection and the recess are in a tripping fit status, the automatic rollback shaft drives the inner cap to rotate upon rotating, the elastic clamping arm is substantially stationary in the torsion chamber, and the projection of the elastic clamping arm skips to the next adjacent recess from the current matched recess while the inner cap rotates with respect to the elastic clamping arm.

    [0030] In a further solution, the middle portion of the elastic clamping arm has at least one elastic zigzag portion; the projection has a cylindrical outer side surface, the recess has an arc surface whose shape is matched with that of the outer side surface of a protruding stud; a groove is arranged at an outer end portion of the torsion shaft, the first end of the elastic energy storage element is clamped in the first groove of the torsion shaft; a connecting portion is formed in the middle of one side of the end cap towards the middle cap, the outer end portion of the connecting portion is provided with a second groove, the first end of the elastic energy storage element is clamped into the second groove of the connecting portion, each buckling foot is distributed in the ring-shaped region of an outer edge of the connecting portion; at least one groove chamber is formed at the surface of the automatic rollback shaft, the groove chamber extends in the length direction of the automatic rollback shaft, an elastic supporting plate for being supported in the shaft cavity of the vacuum packaging bag roll is mounted in the groove chamber, and a spring is mounted at the bottom surface of the elastic supporting plate, for elastically abutting against the elastic supporting plate outwards.

    [0031] Compared with the prior art, the present invention has the following advantages of more conveniently cutting and heat sealing the bag, automatically rolling the vacuum packaging bag back after the hood is opened subsequent to cutting off the bag, reducing the number of operation steps for the user, and exhibiting ease and quickness of operation.

    [0032] The household vacuum sealer according to the present invention has a simple structure since the bag is cut at the original heat-seal bar or the evacuative groove of the lower hood, which is more convenient. Subsequent to cutting off the bag, the vacuum packaging bags are automatically rolled back after the hood is opened, which reduces the number of operation steps for the user, and exhibits ease and quickness of operation.

    BRIEF DESCRIPTION OF THE DRAWINGS



    [0033] The present invention will be further explained below in combination with the drawings and embodiments.

    Figure 1 is a schematic diagram of a structure of a household vacuum sealer according to the present invention.

    Figure 2 is a schematic diagram of a structure with an upper hood opened according to the present invention.

    Figure 3 is a schematic diagram of an internal structure according to the present invention.

    Figure 4 is a partial enlarged diagram of part A in Figure 3.

    Figure 5 is a schematic diagram of a structure of a belt provided with a pushing portion and a cutter device.

    Figure 6 is a schematic diagram of a structure of a cutter device according to the present invention.

    Figure 7 is a schematic diagram of an internal structure of the cutter device according to the present invention.

    Figure 8 is a schematic diagram of a structure of an automatic rollback shaft according to the present invention.

    Figure 9 is a schematic diagram of an internal structure of the automatic rollback shaft according to the present invention.

    Figure 10 is a schematic diagram of assembling an elastic rollback mechanism according to the present invention.

    Figure 11 is a schematic diagram of a structure of the household vacuum sealer with a sliding groove arranged at a front side of the top surface of the upper hood.



    [0034] In the drawings:

    1 upper hood, 10 vacuum packaging bag roll, 11 belt, 110 driving belt body, 111 driven belt body, 12 pushing portion, 13 limiting sliding groove, 14 transmission stud, 15 sliding groove, 16 bag receiving chamber.

    2 lower hood, 20 heat-seal bar, 21 evacuative groove, 22 clearance groove, 23 shaft mounting cavity, 24 latch chamber, 25 spring.

    3 cutter device, 30 cutter box, 301 hook portion, 302 bag putting notch, 31 blade, 310 cutting edge.

    4 automatic rollback shaft, 41 driving wheel, 42 unidirectional rotation limiting latch, 43 unlocking rod, 44 latch hook, 45 unlocking driving portion.

    5 elastic supporting plate, 50 end cap, 501 connecting portion, 502 buckling foot, 51 elastic energy storage element, 52 inner cap, 53 torsion transmitting element, 54 recess, 55 torsion shaft, 56 elastic clamping arm, 57 projection, 58 middle cap, 59 snap ring.


    DETAILED DESCRIPTION



    [0035] Only preferable embodiments of the present invention are described in the following, but not to limit the protection scope of the present invention.

    First embodiment



    [0036] A bag-cutting sealing method of a household vacuum sealer, including the following steps of:
    1. 1) fixing a vacuum packaging bag roll 10 at an automatic rollback shaft 4, mounting two end portions of the automatic rollback shaft 4 in a shaft mounting cavity 23 at two sides of the household vacuum sealer, such that the vacuum packaging bag roll 10 is received in a bag receiving chamber 16 of the household vacuum sealer;
    2. 2) pulling the vacuum packaging bag roll 10 by an appropriate length out of the household vacuum sealer with the bag stretching across a top surface of a hood 2, locating the bag to be cut off in an evacuative groove 21 which is arranged on a lower hood 2 and configured to evacuate; in pulling out the bag, the automatic rollback shaft 4 goes after to rotate, and part of a torsion generated in the rotation of the automatic rollback shaft 4 is transmitted to an elastic energy storage element in an elastic rollback mechanism by means of the elastic rollback mechanism mounted at an end portion of the automatic rollback shaft 4, such that the elastic rollback mechanism exerts an acting force to the automatic rollback shaft 4 for realizing its reverse rotation; locking the automatic rollback shaft 4 to prevent its reverse rotation by an unidirectional rotation limiting latch 42 installed on the lower hood 2;
    3. 3) keeping the pulled-out bag still and locking an upper hood 1, pressing tightly the bag by the upper hood 1 locked onto the lower hood 2, abutting the unidirectional rotation limiting latch 42 mounted on the lower hood 2 by an unlocking rod 43 fixed on the upper hood 1, such that the unidirectional rotation limiting latch 42 unlocks the automatic rollback shaft 4 which reversely rotates and strains the bag due to the torsion of the elastic rollback mechanism, so as to tension the bag at the top surface of the lower hood 2;
    4. 4) cutting off the bag: sliding the cutter device 3 mounted on the upper hood 1 from one side to the other side, cutting off the tensioned bag by a cutter 31 of the cutter device 3 which protrudes from a bottom surface of the upper hood 1 and is located at the side of the evacuative groove 21, the automatic rollback shaft 4 reversely rotating due to the torsion of the elastic rollback mechanism, and automatically rolling the cut-off bag outside the bag receiving chamber 16 back onto the vacuum packaging bag roll 10 in the bag receiving chamber 16;
    5. 5) heat sealing the bag: heat sealing the end portion of the bag by a heat-seal bar 20 which is mounted on the lower hood 2, is located at the side of the evacuative groove 21 and is configured to heat seal after evacuation; this step is set to be conducted automatically after the upper hood 1 is locked or to be conducted after the user touches the corresponding control key;
    6. 6) opening the upper hood 1, the unlocking rod 43 of the upper hood 1 releasing from the unidirectional rotation limiting latch 42 with the rotation of the upper hood 1, the elastic unidirectional locking mechanism resetting and locking the automatic rollback shaft 4;
    7. 7) taking out the cut-off bag to finish the heat-sealing of the end portion of the bag.


    [0037] In the present invention, one end portion of the pulled-out bag of the vacuum packaging bag roll 10 is cut off and heat sealed, which is performed by the existing heat-seal bar 20 of the household vacuum sealer. After the hood is opened, the vacuum packaging bag roll can be automatically rolled back, which has reduced number of operation steps for the user, and exhibits ease and quickness of operation. As for the related structure of the household vacuum sealer in the steps of the present invention, please refer to the second embodiment.

    [0038] In order to evacuate and heat seal the vacuum packaging bag with an article such as food, the opening of the vacuum packaging bag is inserted into the evacuative groove 21 of the household vacuum sealer, the upper hood 1 is then locked, the vacuum pump is started, the vacuum packaging bag is evacuated through the evacuative groove 21 at the opening of the vacuum packaging bag, and then the vacuum packaging bag is heat sealed by the opening of the heat-seal bar 20, to finish evacuation and heat seal.

    Second embodiment



    [0039] As shown in Figures 1 to 10, a household vacuum sealer includes an upper hood 1 and a lower hood 2, wherein the upper hood 1 is rotatably mounted on the lower hood 2, a cutter device 3 is slidably arranged on the upper hood 1, a heat-seal bar 20 and an evacuative groove 21 are arranged at a front position of the upper portion of the lower hood 2, the upper hood 1 and/or the lower hood 2 is provided with a bag receiving chamber 16 for receiving the vacuum packaging bag roll 10, a detachable automatic rollback shaft 4 is rotatably mounted in the bag receiving chamber 16, for passing through a shaft cavity in the middle of the vacuum packaging bag roll 10, and can be taken out, an elastic rollback mechanism and an elastic unidirectional locking mechanism are mounted at the end portion of the automatic rollback shaft 4, the elastic rollback mechanism is configured to automatically roll the rollback shaft 4 back, and the elastic unidirectional locking mechanism is configured to lock the automatic rollback shaft 4, prevent its rollback due to an elastic force of the elastic rollback mechanism and enables the automatic rollback shaft 4 only to rotate in a single direction. In the present invention with a simple structure, the bag can be rolled back automatically after cut off, which has reduced number of operation steps for the user, and exhibits ease of operation.

    [0040] The top half of the cutter device 3 is slidably mounted in the front end portion of the upper hood 1, and the lower portion of the cutter device 3 protrudes from the bottom surface at the front end portion of the lower hood 2 upon cutting the bag. Specifically, at least one pushing portion 12 is arranged at the upper portion of the cutter device 3, at least one cutter is arranged at its lower portion; at least one sliding groove 15 is arranged at the top surface or the front end surface of the upper hood 1, the pushing portion 12 is slidably mounted in the sliding groove 15; the cutter protrudes from the bottom surface of the lower hood 2 upon cutting the bag; after the upper hood 1 is locked onto the lower hood 2, the cutter moves at one side of the heat-seal bar 20 or one side of the evacuative groove 21 back and forth, for cutting off the bag pressed tightly between the upper hood 1 and the lower hood 2.

    [0041] The pushing portion 12 protrudes from the front end surface of the upper hood 1; the cutter device 3 and the cutter are kept protruding at the bottom surface of the lower hood 2 all the time, as shown in Figure 1; or, the pushing portion 12 protrudes from the front side of the top surface of the upper hood 1, as shown in Figure 11.

    [0042] In a preferable embodiment, the cutter device 3 and the cutter protrude from the bottom surface of the lower hood 2 only upon cutting the bag; the cutter device 3 or the pushing portion 12 drives the cutter to eject downwards due to an external force or a switching mechanism.

    [0043] At least one cutter device 3 is slidably mounted on the upper hood 1, and protrudes from the bottom surface of the lower hood 2. After the upper hood 1 is locked onto the lower hood 2, the cutter moves at one side of the heat-seal bar 20 or one side of the evacuative groove 21 back and forth, for cutting off the bag pressed tightly between the upper hood 1 and the lower hood 2. One end portion of the bag is cut off and heat sealed at the heat-seal bar 20 of the lower hood 2, the inner end portion or the outer end portion of the bag is pulled out to the heat-seal bar 20, the upper hood 1 is locked and the inner end portion or the outer end portion of the bag is heat sealable. The bag can be cut off as long as the cutter device 3 slides, to form the vacuum packaging bag with one open end. The bag with one heat sealable end is evacuated and heat sealed at the heat-seal bar 20 and the evacuative groove 21 of the lower hood 2. In the present invention, the operation steps of the household vacuum sealer to cut off the bag and heat seal the bag end portion have been completely changed, and they become simpler and quicker. The use and operation steps of the household vacuum sealer refer to the first embodiment.

    [0044] When the bag is pulled out, the automatic rollback shaft 4 goes after to rotate. While the automatic rollback shaft 4 rotates, the torsion is transmitted to the elastic rollback mechanism, such that the elastic rollback mechanism has a certain elastic force.

    [0045] Specifically, a rear end portion of the upper hood 1 is rotatably mounted at a rear end portion of the lower hood 2, the heat-seal bar 20 and the evacuative groove 21 are arranged at a top surface of the front end portion of the lower hood 2, the heat-seal bar 20 and the evacuative groove 21 are arranged alternately in parallel and extend along a length direction of the lower hood 2, the bag receiving chamber 16 is disposed at the top surface of the rear end portion of the lower hood 2, the left and right end portions of the bag receiving chamber 16 are provided with a shaft mounting cavity 23 respectively, the left and right end portions of the automatic rollback shaft 4 are movably placed in the left and right shaft mounting cavities 23 respectively, and the automatic rollback shaft 4 is rotatable when the bag is pulled out.

    [0046] The elastic unidirectional locking mechanism includes a driving wheel 41, a unidirectional rotation limiting latch 42 and an unlocking rod 43 for changing the state of the unidirectional rotation limiting latch 42, wherein the driving wheel 41 is fixed at a first end portion of the automatic rollback shaft 4, the unidirectional rotation limiting latch 42 is movably mounted on the lower hood 2, and is elastically abutted against the driving wheel 41 for enabling only the unidirectional rotation of the automatic rollback shaft 4 and rolling out the bag; the unlocking rod 43 is fixed on the upper hood 1, and touches the unidirectional rotation limiting latch 42 after the upper hood 1 is locked onto the lower hood 2, to unlock the driving wheel 41 by the unidirectional rotation limiting latch 42. The driving wheel 41 is in a free status, and the automatic rollback shaft 4 reversely rotates under the elastic force of the elastic rollback mechanism, that is to roll back, so as to wind back the pulled-out bags.

    [0047] A latch chamber 24 is arranged on the lower hood 2, the upper portion of the latch chamber 24 communicates with that of the shaft mounting cavity 23 for receiving the first end portion of the automatic rollback shaft 4; the unidirectional rotation limiting latch 42 is rotatably mounted in the latch chamber 24, the front end portion of the unidirectional rotation limiting latch 42 passes through the upper portion of the latch chamber 24 to extend into its adjacent shaft mounting cavity 23; a spring 25 is mounted in the latch chamber 24, and is connected with the unidirectional rotation limiting latch 42, for exerting an elastic force to the unidirectional rotation limiting latch 42 such that it elastically abuts against the driving wheel 41.

    [0048] Several hook teeth are formed at the wheel body or surface of the driving wheel 41 in a circumferential direction, and are selectable from ratchets, helical teeth, snap teeth, snap studs, snap holes or snap caves; a latch hook 44 is formed at a first side of the unidirectional rotation limiting latch 42, an unlocking driving portion 45 is formed at its second side, a driving slot is formed on the unlocking driving portion 45, the middle of the unidirectional rotation limiting latch 42 is pivotably connected to the lower hood 2, the latch hook 44 passes through the upper portion of the latch chamber 24 and extends into its adjacent shaft mounting cavity 23, the latch hook 44 is elastically abutted against the hook teeth of the driving wheel 41, the lower end of the spring 25 is mounted to the bottom of the latch chamber 24, and its upper end is connected to the unlocking driving portion 45, for exerting an upward elastic force to the unlocking driving portion 45; after the upper hood 1 is locked onto the lower hood 2, the unlocking rod 43 is inserted into the driving slot, for driving the latch hook 44 to move upwards and release from the hook teeth, so as to unlock the driving wheel 41 by the unidirectional rotation limiting latch 42.

    [0049] The elastic rollback mechanism includes an end cap 50, an elastic energy storage element 51 and an inner cap component, wherein an embedding chamber is arranged at a second end portion of the automatic rollback shaft 4, an inner cap component is fixed in the embedding chamber; the end cap 50 is rotatably mounted at the inner cap component, the end cap 50 protrudes from a second end portion of the automatic rollback shaft 4, and the end cap 50 is movably snapped in the shaft mounting cavity 23 for receiving the second end portion of the automatic rollback shaft 4, the first end of the elastic energy storage element 51 is connected with the inner cap component, and the second end thereof is connected with the end cap 50.

    [0050] The inner cap component includes an inner cap 52 and a torsion transmitting element 53, wherein a torsion chamber is arranged at one side of the inner cap 52, the torsion transmitting element 53 is rotatably mounted into the torsion chamber, several recesses 54 are formed at an inner wall surface of the torsion chamber in a circumferential direction, a shaft hole is arranged in the middle of the inner cap 52; a torsion shaft 55 protrudes from one side of the torsion transmitting element 53 towards the end cap 50, the torsion shaft 55 is rotatably mounted to the shaft hole of the inner cap 52, an outer end portion of the torsion shaft 55 passes through the shaft hole, and is connected to the first end of the elastic energy storage element 51; at least two elastic clamping arms 56 extend out of the torsion transmitting element 53 in a radial direction, at least one elastic zigzag portion is arranged in the middle of the elastic clamping arm 56; a projection 57 is formed at an outer end portion of the elastic clamping arm 56, and is elastically abutted in the recess 54 at the inner wall surface of the torsion chamber; the projection 57 and the recess 54 have a stationary fit status and a tripping fit status, the projection 57 has a cylindrical outer side surface, the recess 54 has an arc surface whose shape is matched with that of the outer side surface of a protruding stud; a groove is arranged at an outer end portion of the torsion shaft 55, the first end of the elastic energy storage element 51 is clamped in the first groove of the torsion shaft 55; a connecting portion 501 is formed in the middle of one side of the end cap 50 towards the middle cap 58, each buckling foot 502 is distributed in the ring-shaped region of an outer edge of the connecting portion 501; the outer end portion of the connecting portion 501 is provided with a second groove, and the first end of the elastic energy storage element 51 is clamped in the second groove of the connecting portion 501.

    [0051] In the case that the elastic force of the elastic energy storage element 51 is less than a friction force between the projection 57 and the recess 54, the projection 57 and the recess 54 are in a stationary fit status, the automatic rollback shaft 4 drives the inner cap 52, the elastic clamping arm 56 and the torsion shaft 55 to rotate upon rotating, and the elastic energy storage element 51 is in a state of energy storage upon the rotation of the torsion shaft 55.

    [0052] In the case that the elastic force of the elastic energy storage element 51 is larger than the friction force between the projection 57 and the recess 54, the projection 57 and the recess 54 are in a tripping fit status, the automatic rollback shaft 4 drives the inner cap 52 to rotate upon rotating, the elastic clamping arm 56 is substantially stationary in the torsion chamber, and the projection 57 of the elastic clamping arm 56 skips to the next adjacent recess 54 from the current matched recess 54 while the inner cap 52 rotates with respect to the elastic clamping arm 56.

    [0053] The inner cap component includes a middle cap 58, the first side of the middle cap 58 is fixed to the inner cap 52, the inner end portion of the end cap 50 is rotatably mounted to the middle cap 58 which is provided with an energy storage cavity in the middle, the elastic energy storage element 51 is located in the energy storage cavity and is selected from one of elastic steel wire, torsional spring, spiral spring or shrapnel.

    [0054] A through hole is arranged in the middle of the middle cap 58, and is less than the energy storage cavity. A snap ring 59 is formed at a connected surface between the through hole and the energy storage cavity, several buckling feet 502 are formed at one side of the end cap 50 towards the middle cap 58, each buckling foot 502 passes through the through hole and is movably buckled to the snap ring 59 respectively, and an outer side surface of each buckling foot 502 has an arc surface with the same radius, and an outer side surface of each buckling foot 502 is rotatably matched with the through hole.

    [0055] At least one groove chamber is formed at the surface of the automatic rollback shaft 4, the groove chamber extends in the length direction of the automatic rollback shaft 4, an elastic supporting plate 5 for being supported in the shaft cavity of the vacuum packaging bag roll 10 is mounted in the groove chamber, and a spring 25 is mounted at the bottom surface of the elastic supporting plate 5, for elastically abutting against the elastic supporting plate 5 outwards, which is adapted to the shaft-cavity vacuum packaging bag rolls 10 with different inner diameters.

    [0056] A rear end portion of the upper hood 1 is rotatably mounted at a rear end portion of the lower hood 2, the heat-seal bar 20 and the evacuative groove 21 are arranged at a top surface of the front end portion of the lower hood 2, the heat-seal bar 20 and the evacuative groove 21 are arranged alternately in parallel and extend along a length direction of the lower hood 2. The top half of the cutter device 3 is slidably mounted in the front end portion of the upper hood 1, and the lower portion of the cutter device 3 protrudes from the bottom surface at the front end portion of the lower hood 2. The cutter is fixed at the cutter device 3, and moves between the heat-seal bar 20 and the evacuative groove 21 back and forth after the upper hood 1 is locked onto the lower hood 2.

    [0057] A belt 11 is mounted inside the front end portion of the upper hood 1; at least one sliding portion 12 is slidably mounted at the top surface or front end surface of the front end portion of the upper hood 1, for driving the belt 11 to move back and forth; the pushing portion 12 can be set as a plectrum, a button or a push rod, an inner end portion of the pushing portion 12 is fixed to the belt 11; the cutter device 3 is fixed to the belt 11 which drives the cutter device 3 to move back and forth therewith upon moving back and forth, a sliding groove 15 is disposed at a front end surface of the upper hood 1, and the pushing portion 12 is slidably mounted in the sliding groove. The belt 11 is movable back and forth as long as the pushing portion 12 is dragged or pushed back and forth, and the cutter device 3 is driven to move back and forth by the belt 11.

    [0058] A limiting sliding groove 13 is arranged at the bottom surface of the upper hood 1, and is parallel with the heat-seal bar 20 or the evacuative groove 21, several transmission studs 14 are mounted in the upper hood 1, the annular belt 11 is tensioned into a square shape by the transmission studs 14, the part of the belt 11 close to the outer end surface of the upper cover 1 is a driving belt body 110, the part of the belt 11 away from the outer end surface of the upper cover 1 is a driven belt body 111, the pushing portion 12 is fixed to the driving belt body 110, the cutter device 3 is fixed at a driven belt body 111 which slides in the limiting sliding groove 13 back and forth together with the cutter device 3. The driving belt body 110 moves opposite to the driven belt body 111. For example, when the pushing portion 12 is dragged or pushed to the left, the driving belt body 110 moves to the left, and the driven belt body 111 drives the cutter device 3 to move to the right.

    [0059] The cutter device 3 includes a cutter box 30 and two blades 31. One side of the blade 31 has one cutting edge 310, and the blade 31 can be formed by breaking off a blade of a box cutter of the prior art along its fold, so there is no need to particularly customize or produce the blade 31, with low costs. The two blades 31 are fixed at the left and right sides of the cutter box 30 respectively, and the cutting edges 310 of the two blades 31 face towards the outer side. The cutting edges 310 of the two blades 31 incline. The bag can be cut off as long as the cutter moves to either side. A hook portion 301 is formed at the lower portion of the cutter box 30, the middle of the hook portion 301 is connected to the cutter box 30, two bag putting notches 302 are formed at the left and right sides over the hook portion 301 respectively, and the cutting edges 310 of the two blades 31 protrude in the bag putting notch 302 respectively. The cutting edge 310 is located at an inner end portion of the bag putting notch 302, and an acute angle is formed between the inclining cutting edge 310 and the bottom surface of the bag putting notch 302. That is, the blade 31 and the cutting edge 310 are hidden in the bag putting notch 302, which prevent human hands from being scratched by the cutting edge 310 of the blade 31.

    [0060] A clearance groove 22 is arranged on the lower hood 2. After the upper hood 1 is locked onto the lower hood 2, the hook portion 301 is inserted into the clearance groove 22 and slides in the clearance groove 22 back and forth, and the clearance groove 22 is located between the heat-seal bar 20 and the evacuative groove 21. The bag pressed tightly between the upper hood 1 and the lower hood 2 is located in an opening of the bag putting notch 302 in a height direction. When the cutter device 3 moves towards the bag, the edge of the bag automatically slides and inserts into the bag putting notch 302. The bag is positioned by the bag putting notch 302, and the edge of the bag is supported strongly, which prevents the displacement of the bag. The bag can be cut off smoothly while the cutter is moved, which saves effort, and is more stable to cut off the bag.

    [0061] The foregoing merely describes preferable embodiments of the present invention. For persons skilled in the art, according to the concepts of the present invention, amendments to the embodiments and application scope can be made, and the contents of the present invention shall not be interpreted as limitations to the present invention.


    Claims

    1. A bag-cutting sealing method of a household vacuum sealer, comprising the following steps of:

    1) fixing a vacuum packaging bag roll (10) at an automatic rollback shaft (4), mounting two end portions of the automatic rollback shaft (4) in a shaft mounting cavity (23) at two sides of the household vacuum sealer, such that the vacuum packaging bag roll (10) is received in a bag receiving chamber (16) of the household vacuum sealer;

    2) pulling the vacuum packaging bag roll (10) by an appropriate length out of the household vacuum sealer with the bag stretching across a top surface of a lower hood (2), locating the bag to be cut off in an evacuative groove (21) which is arranged on the lower hood (2) and configured to evacuate; in pulling out the bag, the automatic rollback shaft (4) goes after to rotate, and part of a torsion generated in the rotation of the automatic rollback shaft (4) is transmitted to an elastic energy storage element (51) in an elastic rollback mechanism by means of the elastic rollback mechanism mounted at an end portion of the automatic rollback shaft (4), such that the elastic rollback mechanism exerts an acting force to the automatic rollback shaft (4) for realizing its reverse rotation; locking the automatic rollback shaft (4) to prevent its reverse rotation by an unidirectional rotation limiting latch (42) installed on the lower hood (2);

    3) keeping the pulled-out bag still and locking an upper hood (1), pressing tightly the bag by the upper hood (1) locked onto the lower hood (2), abutting the unidirectional rotation limiting latch (42) mounted on the lower hood (2) by an unlocking rod (43) fixed on the upper hood (1), such that the unidirectional rotation limiting latch (42) unlocks the automatic rollback shaft (4) which reversely rotates and strains the bag due to the torsion of the elastic rollback mechanism, so as to tension the bag at the top surface of the lower hood (2);

    4) cutting off the bag: sliding the cutter device (3) mounted on the upper hood (1) from one side to the other side, cutting off the tensioned bag by a cutter (31) of the cutter device (3) which protrudes from a bottom surface of the upper hood (1) and is located at the side of the evacuative groove (21), the automatic rollback shaft (4) reversely rotating due to the torsion of the elastic rollback mechanism, and automatically rolling the cut-off bag outside the bag receiving chamber (16) back onto the vacuum packaging bag roll (10) in the bag receiving chamber (16);

    5) heat sealing the bag: heat sealing the end portion of the bag by a heat-seal bar (20) which is mounted on the lower hood (2), is located at the side of the evacuative groove (21) and is configured to heat seal after evacuation; this step is set to be conducted automatically after the upper hood (1) is locked or to be conducted after the user touches the corresponding control key;

    6) opening the upper hood (1), the unlocking rod (43) of the upper hood (1) releasing from the unidirectional rotation limiting latch (42) with the rotation of the upper hood, the elastic unidirectional locking mechanism resetting and locking the automatic rollback shaft (4);

    7) taking out the cut-off bag to finish the heat-sealing of the end portion of the bag.


     
    2. A household vacuum sealer, comprising an upper hood (1), a lower hood (2) and a cutter device (3), wherein the upper hood (1) is rotatably mounted on the lower hood (2), at least one cutter device (3) is slidably mounted on the upper hood (1), at least one heat-seal bar (20) and at least one evacuative groove (21) are arranged at the upper portion of the lower hood (2), the upper hood (1) and/or the lower hood (2) is provided with a bag receiving chamber (16), wherein

    at least one pushing portion (12) is arranged at the upper portion of the cutter device (3), at least one cutter is arranged at its lower portion;

    at least one sliding groove (15) is disposed at a top surface or a front end surface of the upper hood (1), the pushing portion (12) is slidably mounted in the sliding groove (15);

    the cutter protrudes from the bottom surface of the upper hood (1) at least upon cutting the bag;

    after the upper hood (1) is locked onto the lower hood (2), the cutter moves at one side of the heat-seal bar (20) or one side of the evacuative groove (21) back and forth, for cutting off the bag pressed tightly between the upper hood (1) and the lower hood (2);

    wherein a rear end portion of the upper hood (1) is rotatably mounted at a rear end portion of the lower hood (2), the heat-seal bar (20) and the evacuative groove (21) are arranged at a top surface of the front end portion of the lower hood (2), the heat-seal bar (20) and the evacuative groove (21) are arranged alternately in parallel and extend along a length direction of the lower hood (2), the bag receiving chamber (16) is disposed at the top surface of the rear end portion of the lower hood (2), the left and right end portions of the bag receiving chamber (16) are provided with a shaft mounting cavity (23) respectively;

    and characterized in that a detachable automatic rollback shaft (4) is rotatably mounted in the bag receiving chamber (16), for passing through a shaft cavity in the middle of the vacuum packaging bag roll (10), the left and right end portions of the automatic rollback shaft (4) are movably placed in the left and right shaft mounting cavities (23) respectively;

    the elastic rollback mechanism for automatically rolling the rollback shaft (4) back and the elastic unidirectional locking mechanism for locking the automatic rollback shaft (4) are mounted at the end portion of the automatic rollback shaft (4).


     
    3. The household vacuum sealer according to claim 2, wherein the top half of the cutter device (3) is slidably mounted in the front end portion of the upper hood (1), the lower portion of the cutter device (3) protrudes from the bottom surface at the front end portion of the lower hood (2) at least upon cutting the bag; the pushing portion (12) protrudes from the top surface or the front end surface of the upper hood (1);

    the cutter device (3) and the cutter are kept protruding from the bottom surface of the lower hood (2) all the time; or the cutter device (3) and the cutter protrude from the bottom surface of the lower hood (2) only upon cutting the bag;

    the cutter device (3) or the pushing portion (12) drives the cutter to eject downwards due to an external force or a switching mechanism.


     
    4. The household vacuum sealer according to claim 2, wherein a belt (11) is mounted inside the front end portion of the upper hood (1);

    at least one sliding portion (12) is slidably mounted at the top surface or front end surface of the front end portion of the upper hood (1), for driving the belt (11) to move back and forth;

    an inner end portion of the pushing portion (12) is fixed to the belt (11);

    the cutter device (3) is fixed to the belt (11) which drives the cutter device (3) to move back and forth upon moving back and forth.


     
    5. The household vacuum sealer according to claim 2, wherein the cutter device (3) comprises a cutter box (30) and a cutter, wherein the cutter comprises at least one blade (31), one side of the blade (31) has one cutting edge (310) facing toward an outer side, and the cutting edges (310) of the two blades (31) incline.
     
    6. The household vacuum sealer according to claim 5, wherein the cutter comprises two blades (31), each of which is formed by breaking off a blade of a box cutter along its fold;
    the two blades (31) are fixed at the left and right sides of the cutter box (30) respectively, and the cutting edges (310) of the two blades (31) face towards the outer side respectively, and are arranged in a "V" shape.
     
    7. The household vacuum sealer according to claim 6, wherein a hook portion (301) is formed at the lower portion of the cutter box (30), the middle of the hook portion (301) is connected to the cutter box (30), two bag putting notches (302) are formed at the left and right sides over the hook portion (301) respectively, and the cutting edges (310) of the two blades (31) protrude in the bag putting notch (302) respectively.
     
    8. The household vacuum sealer according to claim 7, wherein a clearance groove (22) is arranged on the lower hood (2), after the upper hood (1) is locked onto the lower hood (2), the hook portion (301) is inserted into the clearance groove (22) and slides in the clearance groove (22) back and forth, and the bag pressed tightly between the upper hood (1) and the lower hood (2) is located in an opening of the bag putting notch (302) in a height direction;
    the cutting edge (310) is located at an inner end portion of the bag putting notch (302), and an acute angle is formed between the inclining cutting edge (310) and the bottom surface of the bag putting notch (302).
     
    9. The household vacuum sealer according to claim 4, wherein a limiting sliding groove (13) is arranged at the bottom surface of the upper hood (1), and is parallel with the heat-seal bar (20) or the evacuative groove (21), several transmission studs (14) are mounted in the upper hood (1), the annular belt (11) is tensioned into a square shape by the transmission studs (14), the part of the belt (11) close to the outer end surface of the upper cover (1) is a driving belt body (110), the part of the belt (11) away from the outer end surface of the upper cover (1) is a driven belt body (111), the pushing portion (12) is fixed to the driving belt body (110), the cutter device (3) is fixed at a driven belt body (111) which slides in the limiting sliding groove (13) back and forth together with the cutter device (3).
     
    10. The household vacuum sealer according to claim 9, wherein the elastic unidirectional locking mechanism comprises a driving wheel (41), a unidirectional rotation limiting latch (42) and an unlocking rod (43) for changing the state of the unidirectional rotation limiting latch (42), wherein the driving wheel (41) is fixed at a first end portion of the automatic rollback shaft (4), the unidirectional rotation limiting latch (42) is movably mounted on the lower hood (2), and is elastically abutted against the driving wheel (41) for enabling only the unidirectional rotation of the automatic rollback shaft (4) and rolling out the bag; the unlocking rod (43) is fixed on the upper hood (1), and touches the unidirectional rotation limiting latch (42) after the upper hood (1) is locked onto the lower hood (2), to unlock the driving wheel (41) by the unidirectional rotation limiting latch (42).
     
    11. The household vacuum sealer according to claim 10, wherein a latch chamber (24) is arranged on the lower hood (2), the upper portion of the latch chamber (24) communicates with that of the shaft mounting cavity (23) for receiving the first end portion of the automatic rollback shaft (4); the unidirectional rotation limiting latch (42) is rotatably mounted in the latch chamber (24), the front end portion of the unidirectional rotation limiting latch (42) passes through the upper portion of the latch chamber (24) to extend into its adjacent shaft mounting cavity (23); a spring (25) is mounted in the latch chamber (24), and is connected with the unidirectional rotation limiting latch (42), for exerting an elastic force to the unidirectional rotation limiting latch (42) such that it elastically abuts against the driving wheel (41).
     
    12. The household vacuum sealer according to claim 11, wherein several hook teeth are formed at the wheel body or surface of the driving wheel (41) in a circumferential direction;

    a latch hook (44) is formed at a first side of the unidirectional rotation limiting latch (42), an unlocking driving portion (45) is formed at its second side, a driving slot is formed on the unlocking driving portion (45),

    the middle of the unidirectional rotation limiting latch (42) is pivotably connected to the lower hood (2), the latch hook (44) passes through the upper portion of the latch chamber (24) and extends into its adjacent shaft mounting cavity (23), the latch hook (44) is elastically abutted against the hook teeth of the driving wheel (41),

    the lower end of the spring (25) is mounted to the bottom of the latch chamber (24), and its upper end is connected to the unlocking driving portion (45), for exerting an upward elastic force to the unlocking driving portion (45);

    after the upper hood (1) is locked onto the lower hood (2), the unlocking rod (43) is inserted into the driving slot, for driving the latch hook (44) to move upwards and release from the hook teeth, so as to unlock the driving wheel (41) by the unidirectional rotation limiting latch (42).


     
    13. The household vacuum sealer according to claim 12, wherein the elastic rollback mechanism comprises an end cap (50), an elastic energy storage element (51) and an inner cap component, wherein an embedding chamber is arranged at a second end portion of the automatic rollback shaft (4), an inner cap component is fixed in the embedding chamber; the end cap (50) is rotatably mounted at the inner cap component, the end cap (50) protrudes from a second end portion of the automatic rollback shaft (4), and the end cap (50) is movably snapped in the shaft mounting cavity (23) for receiving the second end portion of the automatic rollback shaft (4), the first end of the elastic energy storage element (51) is connected with the inner cap component, and the second end thereof is connected with the end cap (50);

    the inner cap component comprises an inner cap (52), a middle cap (58) and a torsion transmitting element (53), wherein a torsion chamber is arranged at one side of the inner cap (52), the torsion transmitting element (53) is rotatably mounted into the torsion chamber, several recesses (54) are formed at an inner wall surface of the torsion chamber in a circumferential direction, a shaft hole is arranged in the middle of the inner cap (52); a torsion shaft (55) protrudes from one side of the torsion transmitting element (53) towards the end cap (50), the torsion shaft (55) is rotatably mounted to the shaft hole of the inner cap (52), an outer end portion of the torsion shaft (55) passes through the shaft hole, and is connected to the first end of the elastic energy storage element (51); at least two elastic clamping arms (56) extend out of the torsion transmitting element (53) in a radial direction, a projection (57) is formed at an outer end portion of the elastic clamping arm (56), and is elastically abutted in the recess (54) at the inner wall surface of the torsion chamber; the first side of the middle cap (58) is fixed to the inner cap (52), the inner end portion of the end cap (50) is rotatably mounted to the middle cap (58) which is provided with an energy storage cavity in the middle, the elastic energy storage element (51) is located in the energy storage cavity and is selected from one of elastic steel wire, torsional spring, spiral spring or shrapnel;

    a through hole is arranged in the middle of the middle cap (58), and is less than the energy storage cavity, a snap ring (59) is formed at a connected surface between the through hole and the energy storage cavity, several buckling feet (502) are formed at one side of the end cap (50) towards the middle cap (58), each buckling foot (502) passes through the through hole and is movably buckled to the snap ring (59) respectively, and an outer side surface of each buckling foot (502) has an arc surface with the same radius, and an outer side surface of each buckling foot (502) is rotatably matched with the through hole;

    the projection (57) and the recess (54) have a stationary fit status and a tripping fit status,

    in the case that the elastic force of the elastic energy storage element (51) is less than a friction force between the projection (57) and the recess (54), the projection (57) and the recess (54) are in a stationary fit status, the automatic rollback shaft (4) drives the inner cap (52), the elastic clamping arm (56) and the torsion shaft (55) to rotate upon rotating, and the elastic energy storage element (51) is in a state of energy storage upon the rotation of the torsion shaft (55);

    in the case that the elastic force of the elastic energy storage element (51) is larger than the friction force between the projection (57) and the recess (54), the projection (57) and the recess (54) are in a tripping fit status, the automatic rollback shaft (4) drives the inner cap (52) to rotate upon rotating, the elastic clamping arm (56) is substantially stationary in the torsion chamber, and the projection (57) of the elastic clamping arm (56) skips to the next adjacent recess (54) from the current matched recess (54) while the inner cap (52) rotates with respect to the elastic clamping arm (56).


     
    14. The household vacuum sealer according to claim 13, wherein the middle portion of the elastic clamping arm (56) has at least one elastic zigzag portion; the projection (57) has a cylindrical outer side surface, the recess (54) has an arc surface whose shape is matched with that of the outer side surface of a protruding stud; a groove is arranged at an outer end portion of the torsion shaft (55), the first end of the elastic energy storage element (51) is clamped in the first groove of the torsion shaft (55); a connecting portion (501) is formed in the middle of one side of the end cap (50) towards the middle cap (58), the outer end portion of the connecting portion (501) is provided with a second groove, the first end of the elastic energy storage element (51) is clamped into the second groove of the connecting portion (501), each buckling foot (502) is distributed in the ring-shaped region of an outer edge of the connecting portion (501); at least one groove chamber is formed at the surface of the automatic rollback shaft (4), the groove chamber extends in the length direction of the automatic rollback shaft (4), an elastic supporting plate (5) for being supported in the shaft cavity of the vacuum packaging bag roll (10) is mounted in the groove chamber, and a spring (25) is mounted at the bottom surface of the elastic supporting plate (5), for elastically abutting against the elastic supporting plate (5) outwards.
     


    Ansprüche

    1. Beutelschneide-Versiegelungsverfahren für ein Haushalt-Vakuumversiegelungsgerät, folgende Schritte umfassend:

    1) Befestigen einer Vakuumverpackungsbeutelrolle (10) auf einer Welle zum automatischen Zurückrollen (4), Montieren von zwei Endabschnitten der Welle zum automatischen Zurückrollen (4) in einen Wellenmontagehohlraum (23) an zwei Seiten des Haushalt-Vakuumversiegelungsgeräts derart, dass die Vakuumverpackungsbeutelrolle (10) in einer Beutelaufnahmekammer (16) des Haushalt-Vakuumversiegelungsgeräts aufgenommen ist,

    2) Ziehen der Vakuumverpackungsbeutelrolle (10) um eine geeignete Länge aus dem Haushalt-Vakuumversiegelungsgerät, wobei der Beutel über eine Oberseite einer unteren Haube (2) gestreckt wird, Anordnen des abzuschneidenden Beutels in einer Vakuumierungsrille (21), die auf der unteren Haube (2) angeordnet und dafür gestaltet ist abzuführen, wobei die Welle zum automatischen Zurückrollen (4) beim Herausziehen des Beutels drehend mitgeht und ein Teil einer Torsion, die bei der Drehung der Welle zum automatischen Zurückrollen (4) erzeugt wird, auf ein Element zum Speichern elastischer Energie (51) in einem elastischen Rückrollmechanismus mittels des elastischen Rückrollmechanismus, der an einen Endabschnitt der Welle zum automatischen Zurückrollen (4) montiert ist, derart übertragen wird, dass der elastische Rückrollmechanismus eine Wirkkraft auf die Welle zum automatischen Zurückrollen (4) ausübt, um deren Rückwärtsdrehung umzusetzen, Arretieren der Welle zum automatischen Zurückrollen (4), um deren Rückwärtsdrehung zu verhindern, durch eine unidirektional drehende begrenzende Klinke (42), die an der unteren Haube (2) installiert ist,

    3) Stillhalten des herausgezogenen Beutels und Arretieren einer oberen Haube (1), festes Pressen des Beutels durch die obere Haube (1), die auf der unteren Haube (2) arretiert ist, Anlegen der unidirektional drehenden begrenzenden Klinke (42), die an die untere Haube (2) montiert ist, durch eine Entriegelungsstange (43), die an der oberen Haube (1) befestigt ist, so dass die unidirektional drehende begrenzende Klinke (42) die Welle zum automatischen Zurückrollen (4) entriegelt, die rückwärts dreht und den Beutel infolge der Torsion des elastischen Rückrollmechanismus dehnt, so dass der Beutel auf der Oberseite der unteren Haube (2) gespannt wird,

    4) Abschneiden des Beutels: Schieben der Schneidevorrichtung (3), die an die obere Haube (1) montiert ist, von einer Seite zur anderen Seite, Abschneiden des gespannten Beutels durch ein Messer (31) der Schneidevorrichtung (3), das aus einer Unterseite der oberen Haube (1) herausragt und an der Seite der Vakuumierungsrille (21) angeordnet ist, wobei sich die Welle zum automatischen Zurückrollen (4) infolge der Torsion des elastischen Rückrollmechanismus rückwärts dreht und den abgeschnittenen Beutel von außerhalb der Beutelaufnahmekammer (16) automatisch zurück auf die Vakuumverpackungsbeutelrolle (10) in der Beutelaufnahmekammer (16) rollt.

    5) Heißsiegeln des Beutels: Heißsiegeln der Endabschnitte des Beutels mit einer Heißsiegelschiene (20), die an die untere Haube (2) montiert ist, an der Seite der Vakuumierungsrille (21) angeordnet ist und dafür gestaltet ist, nach dem Vakuumieren heißzusiegeln, wobei dieser Schritt eingestellt ist, automatisch ausgeführt zu werden, nachdem die obere Haube (1) arretiert ist, oder ausgeführt zu werden, nachdem der Anwender die entsprechende Steuertaste berührt hat,

    6) Öffnen der oberen Haube (1), wobei sich die Entriegelungsstange (43) der oberen Haube (1) mit der Drehung der oberen Haube von der unidirektional drehenden begrenzenden Klinke (42) löst, wobei der elastische unidirektionale Arretierungsmechanismus die Welle zum automatischen Zurückrollen (4) zurückstellt und arretiert,

    7) Herausnehmen des abgeschnittenen Beutels, um das Heißsiegeln des Endabschnitts des Beutels abzuschließen.


     
    2. Haushalt-Vakuumversiegelungsgerät, eine obere Haube (1), eine untere Haube (2) und eine Schneidevorrichtung (3) umfassend, wobei die obere Haube (1) drehbar an die untere Haube (2) montiert ist, mindestens eine Schneidevorrichtung (3) gleitfähig an die obere Haube (1) montiert ist, mindestens eine Heißsiegelschiene (20) und mindestens eine Vakuumierungsrille (21) am oberen Abschnitt der unteren Haube (2) angeordnet sind, wobei die obere Haube (1) und/ oder die untere Haube (2) mit einer Beutelaufnahmekammer (16) versehen sind, wobei

    mindestens ein Drückabschnitt (12) an dem oberen Abschnitt der Schneidevorrichtung (3) angeordnet ist, wobei mindestens ein Messer an dessen unterem Abschnitt angeordnet ist,

    mindestens eine Gleitrille (15) an einer Oberseite oder einer vorderen Endfläche der oberen Haube (1) angeordnet ist, wobei der Drückabschnitt (12) gleitfähig in die Gleitrille (15) montiert ist,

    wobei das Messer aus der Unterseite der oberen Haube (1) herausragt, zumindest auf das Schneiden des Beutels hin,

    sich das Messer nach dem Arretieren der oberen Haube (1) auf der unteren Haube (2) an einer Seite der Heißsiegelschiene (20) oder an einer Seite der Vakuumierungsrille (21) vor und zurück bewegt, um den Beutel abzuschneiden, der fest zwischen die obere Haube (1) und die untere Haube (2) gepresst ist,

    wobei ein hinterer Endabschnitt der oberen Haube (1) drehbar an einen hinteren Endabschnitt der oberen Haube (2) montiert ist, die Heißsiegelschiene (20) und die Vakuumierungsrille (21) an einer Oberseite des vorderen Endabschnitts der unteren Haube (2) angeordnet sind, die Heißsiegelschiene (20) und die Vakuumierungsrille (21) abwechselnd parallel angeordnet sind und sich entlang einer Längsrichtung der unteren Haube (2) erstrecken, die Beutelaufnahmekammer (16) an der Oberseite des hinteren Endabschnitts der unteren Haube (2) angeordnet sind und der linke und der rechte Endabschnitt der Beutelaufnahmekammer (16) jeweils mit einem Wellenmontagehohlraum (23) versehen sind,

    und dadurch gekennzeichnet, dass

    eine lösbare Welle zum automatischen Zurückrollen (4) drehbar in die Beutelaufnahmekammer (16) montiert ist, die durch einen Wellenhohlraum in der Mitte der Vakuumverpackungsbeutelrolle (10) zu führen ist, wobei der linke und der rechte Endabschnitt der Welle zum automatischen Zurückrollen (4) beweglich in dem linken beziehungsweise rechten Wellenmontagehohlraum (23) platziert sind,

    wobei der elastische Rückrollmechanismus zum automatischen Zurückrollen der Welle zum Zurückrollen (4) und der elastische unidirektionale Arretierungsmechanismus zum Arretieren der Welle zum automatischen Zurückrollen (4) an den Endabschnitt der Welle zum automatischen Zurückrollen (4) montiert sind.


     
    3. Haushalt-Vakuumversiegelungsgerät nach Anspruch 2, wobei die obere Hälfte der Schneidevorrichtung (3) gleitfähig an den vorderen Endabschnitt der oberen Haube (1) montiert ist, der untere Abschnitt der Schneidevorrichtung (3) zumindest auf das Schneiden des Beutels hin am vorderen Endabschnitt der unteren Haube (2) aus der Unterseite herausragt und der Drückabschnitt (12) aus der Oberseite oder der vorderen Endfläche der oberen Haube (1) herausragt,

    wobei die Schneidevorrichtung (3) und das Messer die gesamte Zeit aus der Unterseite der unteren Haube (2) herausragend gehalten werden oder die Schneidevorrichtung (3) und das Messer nur auf das Schneiden des Beutels hin aus der Unterseite der unteren Haube (2) herausragen,

    wobei die Schneidevorrichtung (3) oder der Drückabschnitt (12) das Messer aufgrund einer externen Kraft oder eines Schaltmechanismus zum Ausstoßen nach unten treiben.


     
    4. Haushalt-Vakuumversiegelungsgerät nach Anspruch 2, wobei in den vorderen Endabschnitt der oberen Haube (1) ein Riemen (11) montiert ist,

    wobei mindestens ein Gleitabschnitt (12) gleitfähig an die Oberseite oder vordere Endfläche des vorderen Endabschnitts der oberen Haube (1) montiert ist, um den Riemen (11) zur Vor- und Rückwärtsbewegung anzutreiben,

    wobei ein innerer Endabschnitt des Drückabschnitts (12) an dem Riemen (11) befestigt ist,

    wobei die Schneidevorrichtung (3) an dem Riemen (11) befestigt ist, der die Schneidevorrichtung (3) antreibt, sich auf die Vor- und Rückwärtsbewegung hin vor- und rückwärts zu bewegen.


     
    5. Haushalt-Vakuumversiegelungsgerät nach Anspruch 2, wobei die Schneidevorrichtung (3) einen Messerkasten (30) und ein Messer umfasst, wobei das Messer mindestens eine Klinge (31) umfasst, wobei eine Seite der Klinge (31) eine Schneidekante (310) aufweist, die zu einer Außenseite weist, und sich die Schneidekanten (310) der zwei Klingen (31) neigen.
     
    6. Haushalt-Vakuumversiegelungsgerät nach Anspruch 5, wobei das Messer zwei Klingen (31) umfasst, von denen jede durch Abbrechen einer Klinge eines Teppichmessers entlang seiner Bruchkante gebildet ist,
    wobei die zwei Klingen (31) an der linken beziehungsweise an der rechten Seite des Messerkastens (30) befestigt sind und die Schneidekanten (310) der zwei Messer (31) zur jeweiligen Außenseite weisen und in einer V-Form angeordnet sind.
     
    7. Haushalt-Vakuumversiegelungsgerät nach Anspruch 6, wobei an dem unteren Abschnitt des Messerkastens (30) ein Hakenabschnitt (301) gebildet ist, wobei die Mitte des Hakenabschnitts (301) mit dem Messerkasten (30) verbunden ist, an der linken und der rechten Seite über dem Hakenabschnitt (301) zwei Beutelplatzierungskerben (302) entsprechend gebildet sind und die Schneidekanten (310) der zwei Messer (31) entsprechend in die Beutelplatzierungskerbe (302) ragen.
     
    8. Haushalt-Vakuumversiegelungsgerät nach Anspruch 7, wobei an der unteren Haube (2) eine Freiraumrille (22) angeordnet ist, der Hakenabschnitt (301), nachdem die obere Haube (1) auf der unteren Haube (2) arretiert ist, in die Freiraumrille (22) eingeführt ist und in der Freiraumrille (22) vor und zurück gleitet und der Beutel, der fest zwischen die obere Haube (1) und die untere Haube (2) gepresst ist, in einer Öffnung der Beutelplatzierungskerbe (302) in einer Höherichtung angeordnet ist,
    wobei die Schneidekante (310) an einem inneren Endabschnitt der Beutelplatzierungskerbe (302) angeordnet ist und zwischen der geneigten Schneidkante (310) und der Unterseite der Beutelplatzierungskerbe (302) ein spitzer Winkel gebildet ist.
     
    9. Haushalt-Vakuumversiegelungsgerät nach Anspruch 4, wobei an der Unterseite der oberen Haube (1) eine begrenzende Gleitrille (13) angeordnet ist und parallel zur Heißsiegelschiene (20) oder der Vakuumierungsrille (21) liegt, in die obere Haube (1) mehrere Übertragungszapfen (14) montiert sind, der ringförmige Riemen (11) durch die Übertragungszapfen (14) zu einer Quadratform gespannt ist, der Teil des Riemens (11) nahe der äußeren Endfläche der oberen Abdeckung (1) ein Antriebsriemenkörper (110) ist, der von der äußeren Endfläche der oberen Abdeckung (1) entfernte Teil des Riemens (11) ein angetriebener Riemenkörper (111) ist, der Drückabschnitt (12) an dem Antriebsriemenkörper (110) befestigt ist, die Schneidevorrichtung (3) an dem angetriebenen Riemenkörper (111) befestigt ist, der zusammen mit der Schneidevorrichtung (3) in der begrenzenden Gleitrille (13) vor und zurück gleitet.
     
    10. Haushalt-Vakuumversiegelungsgerät nach Anspruch 9, wobei der elastische unidirektionale Arretierungsmechanismus ein Antriebsrad (41), eine unidirektional drehende begrenzende Klinke (42) und eine Entriegelungsstange (43) zum Ändern des Zustandes der unidirektional drehenden begrenzenden Klinke (42) umfasst, wobei das Antriebsrad (41) an einem ersten Endabschnitt der Welle zum automatischen Zurückrollen (4) befestigt ist, die unidirektional drehende begrenzende Klinke (42) beweglich an die untere Haube (2) montiert ist und elastisch an das Antriebsrad (41) angelegt ist, um eine nur unidirektionale Drehung der Welle zum automatischen Zurückrollen (4) und Ausrollen des Beutels zu ermöglichen, die Entriegelungsstange (43) an der oberen Haube (1) befestigt ist und die unidirektional drehende begrenzende Klinke (42) berührt, nachdem die obere Haube (1) auf der unteren Haube (2) arretiert ist, um das Antriebsrad (41) durch die unidirektional drehende begrenzende Klinke (42) zu entriegeln.
     
    11. Haushalt-Vakuumversiegelungsgerät nach Anspruch 10, wobei an der unteren Haube (2) eine Klinkenkammer (24) angeordnet ist, wobei der obere Abschnitt der Klinkenkammer (24) mit dem des Wellenmontagehohlraums (23) in Verbindung steht, um den ersten Endabschnitt der Welle zum automatischen Zurückrollen (4) aufzunehmen, die unidirektional drehende begrenzende Klinke (42) drehbar in die Klinkenkammer (24) montiert ist, der vordere Endabschnitt der unidirektional drehenden begrenzenden Klinke (42) durch den oberen Abschnitt der Klinkenkammer (24) verläuft, um sich in seinen benachbarten Wellenmontagehohlraum (23) zu erstrecken, eine Feder (25) in die Klinkenkammer (24) montiert und mit der unidirektional drehenden begrenzenden Klinke (42) verbunden ist, um auf die unidirektional drehende begrenzende Klinke (42) eine elastische Kraft auszuüben, so dass sie elastisch an dem Antriebsrad (41) anliegt.
     
    12. Haushalt-Vakuumversiegelungsgerät nach Anspruch 11, wobei an dem Radkörper oder der Oberfläche des Antriebsrades (41) in einer Umlaufrichtung mehrere Hakenzähne gebildet sind,

    wobei an einer ersten Seite der unidirektional drehenden begrenzenden Klinke (42) ein Klinkenhaken (44) gebildet ist, an ihrer zweiten Seite ein Entriegelungsantriebsabschnitt (45) gebildet ist, ein Antriebsschlitz an dem Entriegelungsantriebsabschnitt (45) gebildet ist,

    wobei die Mitte der unidirektional drehenden begrenzenden Klinke (42) schwenkbar mit der unteren Haube (2) verbunden ist, der Klinkenhaken (44) durch den oberen Abschnitt der Klinkenkammer (24) verläuft und sich in seinen benachbarten Wellenmontagehohlraum (23) erstreckt, der Klinkenhaken (44) elastisch an die Hakenzähne des Antriebsrades (41) angelegt ist,

    wobei das untere Ende der Feder (25) an die Unterseite der Klinkenkammer (24) montiert ist und ihr oberes Ende mit dem Entriegelungsantriebsabschnitt (45) verbunden ist, um auf den Entriegelungsantriebsabschnitt (45) eine aufwärtsgerichtete elastische Kraft auszuüben,

    wobei die Entriegelungsstange (43), nachdem die obere Haube (1) auf der unteren Haube (2) arretiert worden ist, in den Antriebsschlitz eingeführt ist, um den Klinkenhaken (44) zur Aufwärtsbewegung anzutreiben und von den Hakenzähnen zu lösen, so dass das Antriebsrad (41) durch die unidirektional drehende begrenzende Klinke (42) entriegelt wird.


     
    13. Haushalt-Vakuumversiegelungsgerät nach Anspruch 12, wobei der elastische Rückrollmechanismus eine Endkappe (50), ein Element zum Speichern elastischer Energie (51) und eine innere Kappenkomponente umfasst, wobei an einem zweiten Endabschnitt der Welle zum automatischen Zurückrollen (4) eine einbettende Kammer angeordnet ist, eine innere Kappenkomponente in der einbettenden Kammer befestigt ist, die Endkappe (50) drehbar an die innere Kappenkomponente montiert ist, die Endkappe (50) aus einem zweiten Endabschnitt der Welle zum automatischen Zurückrollen (4) herausragt und die Endkappe (50) beweglich in den Wellenmontagehohlraum (23) eingerastet ist, um den zweiten Endabschnitt der Welle zum automatischen Zurückrollen (4) aufzunehmen, wobei das erste Ende des Elements zum Speichern elastischer Energie (51) mit der inneren Kappenkomponente verbunden ist und sein zweites Ende mit der Endkappe (50) verbunden ist,

    wobei die innere Kappenkomponente eine innere Kappe (52), eine mittlere Kappe (58) und ein Torsionsübertragungselement (53) umfasst, wobei an einer Seite der inneren Kappe (52) eine Torsionskammer angeordnet ist, das Torsionsübertragungselement (53) drehbar in die Torsionskammer montiert ist, an einer Innenwandfläche der Torsionskammer in einer Umlaufrichtung mehrere Vertiefungen (54) gebildet sind, in der Mitte der inneren Kappe (52) eine Wellenöffnung angeordnet ist, aus einer Seite des Torsionsübertragungselements (53) eine Torsionswelle (55) hin zur Endkappe (50) herausragt, die Torsionswelle (55) drehbar in die Wellenöffnung der inneren Kappe (52) montiert ist, ein äußerer Endabschnitt der Torsionswelle (55) durch die Wellenöffnung verläuft und mit dem ersten Ende des Elements zum Speichern elastischer Energie (51) verbunden ist, sich aus dem Torsionsübertragungselement (53) mindestens zwei elastische Klemmarme (56) in die radiale Richtung erstrecken, an einem äußeren Endabschnitt des elastischen Klemmarms (56) ein Vorsprung (57) gebildet und elastisch an die Vertiefung (54) in der Innenwandfläche der Torsionskammer angelegt ist, die erste Seite der mittleren Kappe (58) an der inneren Kappe (52) befestigt ist, der innere Endabschnitt der Endkappe (50) drehbar an die mittlere Kappe (58) montiert ist, die in der Mitte mit einem Energiespeicherhohlraum versehen ist, das Element zum Speichern elastischer Energie (51) in dem Energiespeicherhohlraum angeordnet und aus einem elastischen Stahldraht, einer Torsionsfeder, einer Spiralfeder oder eine Schrapnell ausgewählt ist,

    wobei in der Mitte der mittleren Kappe (58) eine Durchgangsöffnung angeordnet ist und kleiner als der Energiespeicherhohlraum ist, an einer Verbindungsfläche zwischen der Durchgangsöffnung und dem Energiespeicherhohlraum ein Sprengring (59) gebildet ist, an einer Seite der Endkappe (50), hin zur mittleren Kappe (58), mehrere einrastende Füße (502) gebildet sind, wobei jeder einrastende Fuß (502) durch die Durchgangsöffnung verläuft und entsprechend beweglich in den Sprengring (59) eingerastet ist und eine äußere Seitenfläche jedes einrastenden Fußes (502) eine Bogenfläche mit dem gleichen Radius aufweist und eine äußere Seitenfläche jedes einrastenden Fußes (502) drehbar an die Durchgangsöffnung angepasst ist,

    wobei der Vorsprung (57) und die Vertiefung (54) einen stationären Passstatus und einen auslösenden Passstatus aufweisen,

    wobei, wenn die elastische Kraft des Elements zum Speichern elastischer Energie (51) geringer als eine Reibkraft zwischen dem Vorsprung (57) und der Vertiefung (54) ist, sich der Vorsprung (57) und die Vertiefung (54) in einem stationären Passstatus befinden, die Welle zum automatischen Zurückrollen (4) die innere Kappe (52), den elastischen Klemmarm (56) und die Torsionswelle (55) dazu antreibt, sich auf das Drehen hin zu drehen und sich das Element zum Speichern elastischer Energie (51) auf die Drehung der Torsionswelle (55) hin in einem Zustand der Energiespeicherung befindet,

    wobei, wenn die elastische Kraft des Elements zum Speichern elastischer Energie (51) größer als eine Reibkraft zwischen dem Vorsprung (57) und der Vertiefung (54) ist, sich der Vorsprung (57) und die Vertiefung (54) in einem auslösenden Passstatus befinden, die Welle zum automatischen Zurückrollen (4) die innere Kappe (52) dazu antreibt, sich auf das Drehen hin zu drehen, der elastische Klemmarm (56) im Wesentlichen stationär in der Torsionskammer ist und der Vorsprung (57) des elastischen Klemmarms (56) von der momentanen zugeordneten Vertiefung (54) zur nächsten benachbarten Vertiefung (54) springt, während sich die innere Kappe (52) im Verhältnis zum elastischen Klemmarm (56) dreht.


     
    14. Haushalt-Vakuumversiegelungsgerät nach Anspruch 13, wobei der mittlere Abschnitt des elastischen Klemmarms (56) mindestens einen elastischen Zickzackabschnitt aufweist, der Vorsprung (57) eine zylinderförmige äußere Seitenfläche aufweist, die Vertiefung (54) eine Bogenfläche aufweist, deren Form an die der äußeren Seitenfläche eines herausragenden Zapfens angepasst ist, an einem äußeren Endabschnitt der Torsionswelle (55) eine Rille angeordnet ist, das erste Ende des Elements zum Speichern elastischer Energie (51) in die erste Rille der Torsionswelle (55) geklemmt ist, in der Mitte einer Seite der Endkappe (50) hin zur mittleren Kappe (58) ein Verbindungsabschnitt (501) gebildet ist, der äußere Endabschnitt des Verbindungsabschnitts (501) mit einer zweiten Rille versehen ist, das erste Ende des Elements zum Speichern elastischer Energie (51) in die zweite Rille des Verbindungsabschnitts (501) geklemmt ist, jeder einrastende Fuß (502) in der ringförmigen Region eines Außenrandes des Verbindungsabschnitts (501) verteilt ist, mindestens eine Rillenkammer an der Oberfläche der Welle zum automatischen Zurückrollen (4) gebildet ist, die Rillenkammer sich in der Längsrichtung der Welle zum automatischen Zurückrollen (4) erstreckt, in die Rillenkammer eine elastische Trageplatte (5) montiert ist, die in dem Wellenhohlraum der Vakuumverpackungsbeutelrolle (10) zu tragen ist, und an die Unterseite der elastischen Trageplatte (5) eine Feder (25) montiert ist, um nach außen elastisch an der elastischen Trageplatte (5) anzuliegen.
     


    Revendications

    1. Procédé de scellage et de découpe de sac d'un dispositif domestique de scellage sous vide, comprenant les étapes suivantes consistant à :

    1) fixer un rouleau de sacs d'emballage sous vide (10) à un arbre de déplacement arrière automatique (4), monter deux parties d'extrémité de l'arbre de déplacement arrière automatique (4) dans une cavité de montage d'arbre (23) au niveau des deux côtés du dispositif domestique de scellage sous vide, de sorte que le rouleau de sacs d'emballage sous vide (10) est reçu dans une chambre de réception de sac (16) du dispositif domestique de scellage sous vide ;

    2) extraire le rouleau de sacs d'emballage sous vide (10) selon une longueur appropriée du dispositif domestique de scellage sous vide, avec le sac qui s'étire de part et d'autre d'une surface supérieure d'un capot inférieur (2), positionner le sac à couper dans une rainure de mise sous vide (21) qui est agencée sur le capot inférieur (2) et configurée pour la mise sous vide ; à l'étape d'extraction du sac, l'arbre de déplacement arrière automatique (4) continue à tourner, et une partie d'une torsion générée lors de la rotation du rouleau de déplacement arrière automatique (4) est transmise à un élément de stockage d'énergie élastique (51) dans un mécanisme de déplacement arrière élastique au moyen du mécanisme de déplacement arrière élastique monté sur une partie d'extrémité de l'arbre de déplacement arrière automatique (4), de sorte que le mécanisme de déplacement arrière automatique exerce une force d'action sur l'arbre de déplacement arrière automatique (4) pour réaliser sa rotation en sens inverse ; verrouiller l'arbre de déplacement arrière automatique (4) pour empêcher sa rotation en sens inverse par un verrou de limitation de rotation unidirectionnelle (42) installé sur le capot inférieur (2) ;

    3) maintenir le sac toujours extrait et verrouiller un capot supérieur (1), comprimer fermement le sac avec le capot supérieur (1) verrouillé sur le capot inférieur (2), amener en butée le verrou de limitation de rotation unidirectionnelle (42) monté sur le capot inférieur (2) par une tige de déverrouillage (43) fixée sur le capot supérieur (1), de sorte que le verrou de limitation de rotation unidirectionnelle (42) déverrouille l'arbre de déplacement arrière automatique (4) qui tourne en sens inverse et tend le sac en raison de la torsion du mécanisme de déplacement arrière élastique, afin de tendre le sac au niveau de la surface supérieure du capot inférieur (2) ;

    4) découper le sac : faire coulisser le dispositif de coupe (3) monté sur le capot supérieur (1) d'un côté à l'autre, couper le sac tendu avec un couteau (31) du dispositif de coupe (3) qui fait saillie d'une surface inférieure du capot supérieur (1) et est positionné du côté de la rainure de mise sous vide (21), l'arbre de déplacement arrière automatique (4) tournant en sens inverse en raison de la torsion du mécanisme de déplacement arrière élastique, et faire rouler automatiquement le sac découpé à l'extérieur de la chambre de réception de sac (16) en arrière sur le rouleau de sacs d'emballage sous vide (10) dans la chambre de réception de sac (16) ;

    5) thermosouder le sac : thermosouder la partie d'extrémité du sac par une barre de thermosoudage (20) qui est montée sur le capot inférieur (2), est positionnée du côté de la rainure de mise sous vide (21) et est configurée pour thermosouder après la mise sous vide ; cette étape doit être réalisée automatiquement après que le capot supérieur (1) a été verrouillé ou être réalisée après que l'utilisateur a touché la touche de commande correspondante ;

    6) ouvrir le capot supérieur (1), la tige de déverrouillage (43) du capot supérieur (1) se libérant du verrou de limitation de rotation unidirectionnelle (42) avec la rotation du capot supérieur, le mécanisme de verrouillage unidirectionnel élastique réinitialisant et verrouillant l'arbre de déplacement arrière automatique (4) ;

    7) retirer le sac découpé pour finir le thermosoudage de la partie d'extrémité du sac.


     
    2. Dispositif domestique de scellage sous vide comprenant un capot supérieur (1), un capot inférieur (2) et un dispositif de coupe (3), dans lequel le capot supérieur (1) est monté en rotation sur le capot inférieur (2), au moins un dispositif de coupe (3) est monté de manière coulissante sur le capot supérieur (1), au moins une barre de thermosoudage (20) et au moins une rainure de mise sous vide (21) sont agencées au niveau de la partie supérieure du capot inférieur (2), le capot supérieur (1) et/ou le capot inférieur (2) sont prévus avec une chambre de réception de sac (16), dans lequel :

    au moins une partie de poussée (12) est agencée au niveau de la partie supérieure du dispositif de coupe (3), au moins un couteau est agencé au niveau de sa partie inférieure ;

    au moins une rainure de coulissement (15) est disposée au niveau d'une surface supérieure ou d'une surface d'extrémité avant du capot supérieur (1), la partie de poussée (12) est montée, de manière coulissante, dans la rainure de coulissement (15) ;

    le couteau fait saillie de la surface inférieure du capot supérieur (1) au moins suite à la découpe du sac ;

    après que le capot supérieur (1) a été verrouillé sur le capot inférieur (2), le couteau se déplace d'un côté de la barre de thermosoudage (20) ou d'un côté de la rainure de mise sous vide (21) vers l'avant et vers l'arrière, pour découper le sac fermement comprimé entre le capot supérieur (1) et le capot inférieur (2) ;

    dans lequel une partie d'extrémité arrière du capot supérieur (1) est montée en rotation au niveau d'une partie d'extrémité arrière du capot inférieur (2), la barre de thermosoudage (20) et la rainure de mise sous vide (21) sont agencées sur une surface supérieure de la partie d'extrémité avant du capot inférieur (2), la barre de thermosoudage (20) et la rainure de mise sous vide (21) sont agencées de manière alternée en parallèle et s'étendent le long d'une direction de longueur du capot inférieur (2), la chambre de réception de sac (16) est disposée sur la surface supérieure de la partie d'extrémité arrière du capot inférieur (2), les parties d'extrémité gauche et droite de la chambre de réception de sac (16) sont respectivement prévues avec une cavité de montage d'arbre (23) ;

    et caractérisé en ce que :

    un arbre de déplacement arrière automatique (4) détachable est monté en rotation dans la chambre de réception de sac (16), pour traverser une cavité d'arbre dans le centre du rouleau de sacs d'emballage sous vide (10), les parties d'extrémité gauche et droite de l'arbre de déplacement arrière automatique (4) sont respectivement placées de manière mobile dans les cavités de montage d'arbre gauche et droite (23) ;

    le mécanisme de déplacement arrière élastique pour faire tourner en arrière l'arbre de déplacement arrière automatique (4) et le mécanisme de verrouillage unidirectionnel élastique pour verrouiller l'arbre de déplacement arrière automatique (4) sont montés sur la partie d'extrémité de l'arbre de déplacement arrière automatique (4).


     
    3. Dispositif domestique de scellage sous vide selon la revendication 2, dans lequel la moitié supérieure du dispositif de coupe (3) est montée de manière coulissante dans la partie d'extrémité avant du capot supérieur (1), la partie inférieure du dispositif de coupe (3) fait saillie de la surface inférieure au niveau de la partie d'extrémité avant du capot inférieur (2) au moins suite à la découpe du sac ; la partie de poussée (12) fait saillie de la surface supérieure ou de la surface d'extrémité avant du capot supérieur (1) ;

    le dispositif de coupe (3) et le couteau sont maintenus en saillie par rapport à la surface inférieure du capot inférieur (2) à tout moment ; ou bien le dispositif de coupe (3) et le couteau font saillie par rapport à la surface inférieure du capot inférieur (2) uniquement suite à la découpe du sac ;

    le dispositif de coupe (3) ou la partie de poussée (12) entraîne le couteau pour l'éjection descendante en raison d'une force externe ou d'un mécanisme de commutation.


     
    4. Dispositif domestique de scellage sous vide selon la revendication 2, dans lequel une courroie (11) est montée à l'intérieur de la partie d'extrémité avant du capot supérieur (1) ;

    au moins une partie de coulissement (12) est montée de manière coulissante sur la surface supérieure ou la surface d'extrémité avant de la partie d'extrémité avant du capot supérieur (1), pour entraîner la courroie (11) afin qu'elle se déplace en avant et en arrière ;

    une partie d'extrémité interne de la partie de poussée (12) est fixée sur la courroie (11) ;

    le dispositif de coupe (3) est fixé sur la courroie (11) qui entraîne le dispositif de coupe (3) pour qu'il se déplace vers l'arrière et vers l'avant suite au déplacement vers l'arrière et vers l'avant.


     
    5. Dispositif domestique de scellage sous vide selon la revendication 2, dans lequel le dispositif de coupe (3) comprend une boîte de coupe (30) et un couteau, dans lequel le couteau comprend au moins une lame (31), un côté de la lame (31) a un bord de coupe (310) orienté vers un côté externe, et les bords de coupe (310) des deux lames (31) s'inclinent.
     
    6. Dispositif domestique de scellage sous vide selon la revendication 5, dans lequel le couteau comprend deux lames (31), dont chacune est formée en détachant une lame d'un couteau tout usage le long de son pli ;
    les deux lames (31) sont respectivement fixées sur les côtés gauche et droit de la boîte de coupe (30), et les bords de coupe (310) des deux lames (31) sont respectivement orientés vers le côté externe, et sont agencés en forme de « V ».
     
    7. Dispositif domestique de scellage sous vide selon la revendication 6, dans lequel une partie de crochet (301) est formée au niveau de la partie inférieure de la boîte de coupe (30), le centre de la partie de crochet (301) est raccordé à la boîte de coupe (30), deux encoches d'introduction de sac (302) sont respectivement formées sur les côtés gauche et droit sur la partie de crochet (301) et les bords de coupe (310) des deux lames (31) font respectivement saillie dans l'encoche d'introduction de sac (302).
     
    8. Dispositif domestique de scellage sous vide selon la revendication 7, dans lequel une rainure de dégagement (22) est agencée sur le capot inférieur (2), après que le capot supérieur (1) a été verrouillé sur le capot inférieur (2), la partie de crochet (301) est insérée dans la rainure de dégagement (22) et coulisse dans la rainure de dégagement (22) vers l'arrière et vers l'avant, et le sac fermement comprimé entre le capot supérieur (1) et le capot inférieur (2) est positionné dans une ouverture de l'encoche d'introduction de sac (302) dans le sens de la hauteur ;
    le bord de coupe (310) est positionné au niveau de la partie d'extrémité interne de l'encoche d'introduction de sac (302), et un angle aigu est formé entre le bord de coupe incliné (310) et la surface inférieure de l'encoche d'introduction de sac (302).
     
    9. Dispositif domestique de scellage sous vide selon la revendication 4, dans lequel une rainure de limitation de coulissement (13) est agencée au niveau de la surface inférieure du capot supérieur (1) et est parallèle à la barre de thermosoudage (20) ou à la rainure de mise sous vide (21), plusieurs goujons de transmission (14) sont montés dans le capot supérieur (1), la courroie annulaire (11) est tendue en une forme de carré par le goujons de transmission (14), la partie de la courroie (11) à proximité de la surface d'extrémité externe du couvercle supérieur (1) est un corps de courroie d'entraînement (110), la partie de la courroie (11) à distance de la surface d'extrémité externe du couvercle supérieur (1) est un corps de courroie entraîné (111), la partie de poussée (12) est fixée sur le corps de courroie d'entraînement (110), le dispositif de coupe (3) est fixé sur un corps de courroie entraîné (111) qui coulisse dans la rainure de limitation de coulissement (13) en arrière et en avant conjointement avec le dispositif de coupe (3).
     
    10. Dispositif domestique de scellage sous vide selon la revendication 9, dans lequel le mécanisme de verrouillage unidirectionnel comprend une roue d'entraînement (41), un verrou de limitation de rotation unidirectionnelle (42) et une tige de déverrouillage (43) pour modifier l'état du verrou de limitation de rotation unidirectionnelle (42), dans lequel la roue d'entraînement (41) est fixée sur une première partie d'extrémité de l'arbre de déplacement arrière automatique (4), le verrou de limitation de rotation unidirectionnelle (42) est monté de manière mobile sur le capot inférieur (2) et est élastiquement en butée contre la roue d'entraînement (41) pour ne permettre que la rotation unidirectionnelle de l'arbre de déplacement arrière automatique (4) et le déroulement du sac ; la tige de déverrouillage (43) est fixée sur le capot supérieur (1) et touche le verrou de limitation de rotation unidirectionnelle (42) après que le capot supérieur (1) a été verrouillé sur le capot inférieur (2), pour déverrouiller la roue d'entraînement (41) par le verrou de limitation de rotation unidirectionnelle (42).
     
    11. Dispositif domestique de scellage sous vide selon la revendication 10, dans lequel une chambre de verrou (24) est agencée sur le capot inférieur (2), la partie supérieure de la chambre de verrou (24) communique avec celle de la cavité de montage d'arbre (23) pour recevoir la première partie d'extrémité de l'arbre de déplacement arrière automatique (4) ; le verrou de limitation de rotation unidirectionnelle (42) est monté de manière rotative dans la chambre de verrou (24), la partie d'extrémité avant du verrou de limitation de rotation unidirectionnelle (42) traverse la partie supérieure de la chambre de verrou (24) pour s'étendre dans sa cavité de montage d'arbre (23) adjacente ; un ressort (25) est monté dans la chambre de verrou (24) et est raccordé avec le verrou de limitation de rotation unidirectionnelle (42), pour exercer une force élastique sur le verrou de limitation de rotation unidirectionnelle (42) de sorte qu'il vient élastiquement en butée contre la roue d'entraînement (41).
     
    12. Dispositif domestique de scellage sous vide selon la revendication 11, dans lequel plusieurs dents de crochet sont formées au niveau du corps ou surface de roue de la roue d'entraînement (41) dans une direction circonférentielle ;

    un crochet de verrou (44) est formé sur un premier côté du verrou de limitation de rotation unidirectionnelle (42), une partie d'entraînement de déverrouillage (45) est formée au niveau de son second côté, une fente d'entraînement est formée sur la partie d'entraînement de déverrouillage (45),

    le centre du verrou de limitation de rotation unidirectionnelle (42) est raccordé de manière pivotante au capot inférieur (2), le crochet de verrou (44) traverse la partie supérieure de la chambre de verrou (24) et s'étend dans sa cavité de montage d'arbre (23) adjacente, le crochet de verrou (44) vient élastiquement en butée contre les dents de crochet de la roue d'entraînement (41),

    l'extrémité inférieure du ressort (25) est montée sur le fond de la chambre de verrou (24), et son extrémité supérieure est raccordée à la partie d'entraînement de déverrouillage (45), pour exercer une force élastique ascendante sur la partie d'entraînement de déverrouillage (45) ;

    après que le capot supérieur (1) a été verrouillé sur le capot inférieur (2), la tige de déverrouillage (43) est insérée dans la fente d'entraînement, pour entraîner le crochet de verrou (44) afin qu'il monte et se libère des dents de crochet, pour déverrouiller la roue d'entraînement (41) par le verrou de limitation de rotation unidirectionnelle (42).


     
    13. Dispositif domestique de scellage sous vide selon la revendication 12, dans lequel le mécanisme de déplacement arrière élastique comprend un capuchon d'extrémité (50), un élément de stockage d'énergie élastique (51) et un composant de capuchon interne, dans lequel une chambre d'incorporation est agencée au niveau d'une seconde partie d'extrémité de l'arbre de déplacement arrière automatique (4), un composant de capuchon interne est fixé dans la chambre d'incorporation ; le capuchon d'extrémité (50) est monté en rotation sur le composant de capuchon interne, le capuchon d'extrémité (50) fait saillie d'une seconde partie d'extrémité de l'arbre de déplacement arrière automatique (4), et le capuchon d'extrémité (50) est encliqueté de manière mobile dans la cavité de montage d'arbre (23) pour recevoir la seconde partie d'extrémité de l'arbre de déplacement arrière automatique (4), la première extrémité de l'élément de stockage d'énergie élastique (51) est raccordée avec le composant de capuchon interne, et sa seconde extrémité est raccordée avec le capuchon d'extrémité (50) ;

    le composant de capuchon interne comprend un capuchon interne (52), un capuchon central (58) et un élément de transmission de torsion (53), dans lequel une chambre de torsion est agencée d'un côté du capuchon interne (52), l'élément de transmission de torsion (53) est monté en rotation dans la chambre de torsion, plusieurs évidements (54) sont formés sur une surface de paroi interne de la chambre de torsion dans une direction circonférentielle, un trou d'arbre est agencé au centre du capuchon interne (52) ; un arbre de torsion (55) fait saillie d'un côté de l'élément de transmission de torsion (53) vers le capuchon d'extrémité (50), l'arbre de torsion (55) est monté en rotation sur le trou d'arbre du capuchon interne (52), une partie d'extrémité externe de l'arbre de torsion (55) passe par le trou d'arbre, et est raccordée à la première extrémité de l'élément de stockage d'énergie élastique (51) ; au moins deux bras de serrage élastiques (56) s'étendent hors de l'élément de transmission de torsion (53) dans une direction radiale, une saillie (57) est formée au niveau d'une partie d'extrémité externe du bras de serrage élastique (56), et vient élastiquement en butée dans l'évidement (54) au niveau de la surface de paroi interne de la chambre de torsion ; le premier côté du capuchon central (58) est fixé sur le capuchon interne (52), la partie d'extrémité interne du capuchon d'extrémité (50) est montée en rotation sur le capuchon central (58) qui est prévu avec une cavité de stockage d'énergie dans le centre, l'élément de stockage d'énergie élastique (51) est positionné dans la cavité de stockage d'énergie et est sélectionné à partir de l'un parmi un fil d'acier élastique, un ressort de torsion, un ressort en spirale ou un éclat d'obus ;

    un trou débouchant est agencé au centre du capuchon central (58) et est inférieur à la cavité de stockage d'énergie, un anneau de retenue (59) est formé au niveau d'une surface raccordée entre le trou débouchant et la cavité de stockage d'énergie, plusieurs pieds de déformation (502) sont formés d'un côté du capuchon d'extrémité (50) vers le capuchon central (58), chaque pied de déformation (502) traverse le trou débouchant et est déformé de manière mobile sur l'anneau de retenue (59) respectivement, et une surface latérale externe de chaque pied de déformation (502) a une surface d'arc avec le même rayon, et une surface latérale externe de chaque pied de déformation (502) correspond en rotation au trou débouchant ;

    la saillie (57) et l'évidement (54) ont un état d'ajustement fixe et un état d'ajustement de déclenchement,

    dans le cas dans lequel la force élastique de l'élément de stockage d'énergie élastique (51) est inférieure à une force de friction entre la saillie (57) et l'évidement (54), la saillie (57) et l'évidement (54) sont dans un état d'ajustement fixe, le rouleau de déplacement arrière automatique (4) entraîne le capuchon interne (52), le bras de serrage élastique (56) et l'arbre de torsion (55) à tourner suite à la rotation, et l'élément de stockage d'énergie élastique (51) est dans un état de stockage d'énergie suite à la rotation de l'arbre de torsion (55) ;

    dans le cas dans lequel la force élastique de l'élément de stockage d'énergie élastique (51) est supérieure à la force de friction entre la saillie (57) et l'évidement (54), la saillie (57) et l'évidement (54) sont dans un état d'ajustement de déclenchement, l'arbre de déplacement arrière automatique (4) entraîne le capuchon interne (52) à tourner suite à la rotation, le bras de serrage élastique (56) est sensiblement fixe dans la chambre de torsion, et la saillie (57) du bras de serrage élastique (56) passe à l'évidement (54) adjacent suivant à partir de l'évidement (54) actuel correspondant alors que le capuchon interne (52) tourne par rapport au bras de serrage élastique (56).


     
    14. Dispositif domestique de scellage sous vide selon la revendication 13, dans lequel la partie centrale du bras de serrage élastique (56) a au moins une partie élastique en zigzag ; la saillie (57) a une surface latérale externe cylindrique, l'évidement (54) a une surface d'arc dont la forme correspond avec celle de la surface latérale externe d'un goujon en saillie ; une rainure est agencée sur une partie d'extrémité externe de l'arbre de torsion (55), la première extrémité de l'élément de stockage d'énergie élastique (51) est serrée dans la première rainure de l'arbre de torsion (55) ; une partie de raccordement (501) est formée dans le centre d'un côté du capuchon d'extrémité (50) vers le capuchon central (58), la partie d'extrémité externe de la partie de raccordement (501) est prévue avec une seconde rainure, la première extrémité de l'élément de stockage d'énergie élastique (51) est serrée dans la seconde rainure de la partie de raccordement (501), chaque pied de déformation (502) est réparti dans la région de forme annulaire d'un bord externe de la partie de raccordement (501) ; au moins une chambre de rainure est formée au niveau de la surface du rouleau de déplacement arrière automatique (4), la chambre de rainure s'étend dans le sens de la longueur de l'arbre de déplacement arrière automatique (4), une plaque de support élastique (5) destinée à être supportée dans la cavité d'arbre du rouleau de sacs d'emballage sous vide (10) est montée dans la chambre de rainure, et un ressort (25) est monté sur la surface inférieure de la plaque de support élastique (5), pour venir élastiquement en butée contre la plaque de support élastique (5) vers l'extérieur.
     




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    Cited references

    REFERENCES CITED IN THE DESCRIPTION



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    Patent documents cited in the description