COMBINED LIFT TABLE

Abstract

 The invention relates to a combined lift table comprising a desktop frame (1) comprising a connecting seat (3), and a base (2) comprising a slot (4), wherein the connecting seat (3) of the desktop frame (1) is insertable in the slot (4), wherein the base (2) comprises first supporting rods (411,431).
According to a first configuration the connecting seat (3) is inserted in the slot (4) in a first position, such that the connecting seat (3) rests on the supporting rods (411,431).
According to a second configuration the connecting seat (3) is inserted in the slot (4) in a second position, such that the connecting seat (3) does not contact the supporting rods (411,431).
This results in a greater total height of the combined lift table in the first configuration than in the second configuration.

Description

Technical field

[0001] The present invention belongs to the technical field of furniture, and relates to a table, particularly a combined lift table.

Prior art

[0002] Home and office tables generally have fixed heights, making them non-adjustable during use. Therefore, they are inconvenient in use and do not meet the demands of different people. Many lift tables have appeared on the market, such as the one described in the Chinese patent application CN102440555A, wherein the height of the desktop is changeable by rotating a threaded rod, and the Chinese patent application CN102715729B, which discloses a lift table including a desktop, a switch, and two support assemblies comprising a base, a motor, a reducer, a screw rod, two supporting rods, and a torsion spring. Therein, the motor, reducer, and wire rod are installed inside the base, whereas the reducer and the wire rod are connected to each other. The motor is connected to the two supporting rods at the lower end, by means of the reducer and the wire rod, and the two supporting rods are connected to each other by means of the torsion spring. The desktop cover plate comprises a base plate, a top surface decorative board, and a lateral decorative plate. The switch is installed on the top surface decorative board, or on the lateral decorative plate. The upper end of the support rod is connected to a substrate, and the two supporting rods are arranged symmetrically along the centre of the substrate. Tables of the above types can be raised or lowered, but this function is achieved by means of a mechanical drive, which is prone to mechanical failure and making them unable to use.

Technical problem

[0003] The problem to be solved by the present invention is to provide a combined lift table with a simple structure and a low failure rate.

[0004] This problem is solved by the subject-matter of the independent claim 1.

[0005] Embodiments of the invention are claimed by the dependent claims 2 to 15.

Description of the invention

[0006] According to a first aspect of the invention, a combined lift table comprising a desktop frame and a base is provided. Therein, the desktop frame comprises a connecting seat, and the base comprises a slot, wherein the connecting seat of the desktop frame is insertable in the slot of the base.

[0007] The desktop frame has a frame height defined as the vertical extension from the upper boundary of the desktop frame to the lower boundary of the connecting seat, when the connecting seat is inserted in the slot of the base.

[0008] The combined lift table has a total height defined as the maximal extension from the upper boundary of the desktop frame to the lower boundary of the base, when the connecting seat is inserted in the slot of the base.

[0009] The base comprises at least one first supporting rod 1 and/or at least one first supporting rod 3, wherein the at least one first supporting rod 1 and/or at least one first supporting rod 3 are positioned at a maximal vertical distance from the lower boundary of the base. In particular, the base comprises two first supporting rods, particularly one first supporting rod 1 and one first supporting rod 3. More particularly, the first supporting rod 1 and the first supporting rod 3 are positioned at the same maximal vertical distance from the lower boundary of the base. In particular, the at least one first supporting rod 1 and/or the at least one first supporting rod 3 are arranged horizontally.

[0010] The combined lift table comprises at least two configurations. According to a first configuration the connecting seat is inserted in the slot in a first position, such that the connecting seat rests on the at least one first supporting rod 1 and/or on the at least one first supporting rod 3, resulting in a first value of the total height equal to the sum of the frame height of the desktop frame and the maximal vertical distance of the at least one first supporting rod 1 and/or the at least one first supporting rod 3. In particular, the connecting seat rests on the at least one first supporting rod 1 and the at least one first supporting rod 3 in the first configuration.

[0011] According to a second configuration the connecting seat is inserted in the slot in a second position, such that the connecting seat does not contact the at least one first supporting rod and does not contact the at least one first supporting rod 3, resulting in a second value of the total height, wherein the first value of the total height is greater than the second value of the total height.

[0012] In certain embodiments, the ratio between the first value and the second value is greater than 1.05, more particularly greater than 1.1, even more particularly greater than 1.2, most particularly greater than 1.5.

[0013] Advantageously, this design, which lacks a mechanical drive for height adjustment of the lift table, is easy to operate and has a low failure rate.

[0014] In certain embodiments, the connecting seat comprises at least one short bottom frame tube, wherein the at least one short bottom frame tube rests on the first supporting rod 1 and/or the first supporting rod 3 in the first configuration of the combined lift table, particularly wherein the short bottom frame tube is arranged parallel to the first supporting rod 1 and/or the first supporting rod 3. In particular, the connecting seat comprises two, more particularly transversely arranged, short bottom frame tubes, wherein one of the two short bottom frame tubes rests on the first supporting rod 1 and wherein the other of the two short bottom frame tubes rests on the first supporting rod 3 in the first configuration of the combined lift table.

[0015] In certain embodiments, the combined lift table comprises at least one buckle 1, which is adapted to mechanically connect the short bottom frame tube to the first supporting rod 1 and/or the first supporting rod 3. In particular, the combined lift table comprises two buckles 1, wherein one of the buckles 1 is adapted to mechanically connect one of the short bottom frame tubes to the first supporting rod 1, and wherein the other buckle 1 is adapted to mechanically connect the other short bottom frame tube to the first supporting rod 3. In particular, the buckle 1 may be mechanically connected to or constructed as an integral part of the base or may be mechanically connected to or constructed as an integral part of the desktop frame, particularly of the connecting seat.

[0016] Advantageously, the buckles, which are adapted to connect the connecting seat to the base of the combined lift table, provide structural strength and stability of the lift table.

[0017] In certain embodiments, the connecting seat rests on a surface, particularly a floor, in the second configuration of the combined lift table, when the combined lift table is positioned on the surface.

[0018] In certain embodiments, the base comprises at least one second supporting rod 2 and/or at least one second supporting rod 4, wherein the connecting seat rests on the at least one second supporting rod 2 and/or on the at least one second supporting rod 4 in the second configuration of the combined lift table. In particular, the base comprises two second supporting rods, particularly one second supporting rod 2 and one second supporting rod 4. More particularly, the second supporting rod 2 and the second supporting rod 4 are positioned at the same height from the lower boundary of the base. In particular, the at least one second supporting rod 2 and/or the at least one second supporting rod 4 are arranged horizontally.

[0019] In certain embodiments, the connecting seat comprises at least one long bottom tube, which rests on the second supporting rod 2 and/or the second supporting rod 4 in the second configuration of the combined lift table, particularly wherein the long bottom tube is positioned parallel to the second supporting rod 2. In particular, the connecting seat comprises two, more particularly transversely arranged, long bottom tubes, wherein one of the two long bottom tubes rests on the second supporting rod 2 and wherein the other of the two long bottom tubes rests on the second supporting rod 4 in the second configuration of the combined lift table.

[0020] In certain embodiments, the base comprises at least one buckle 2, which is adapted to mechanically connect the long bottom tube to the second supporting rod 2 and/or to the second supporting rod 4. In particular, the combined lift table comprises two buckles 2, wherein one of the buckles 2 is adapted to mechanically connect one of the long bottom tubes to the second supporting rod 2, and wherein the other buckle 2 is adapted to mechanically connect the other long bottom tube to the second supporting rod 4. In particular, the buckle 2 may be mechanically connected to or constructed as an integral part of the base or may be mechanically connected to or constructed as an integral part of the desktop frame, particularly of the connecting seat.

[0021] Advantageously, the buckles, which are adapted to connect the connecting seat to the base of the combined lift table, provide structural strength and stability of the lift table.

[0022] In certain embodiments, the slot comprises at least a first partial cross-sectional area and a second partial cross-sectional area, wherein the connecting seat is insertable in the first partial cross-sectional area in the first configuration of the combined lift table, and wherein the connecting seat is insertable in the second partial cross-sectional area in the second configuration of the combined lift table. In particular, the first and the second partial cross-sectional area partially overlap with each other.

[0023] In certain embodiments, the first partial cross-sectional area and the second partial cross-sectional area each comprise a geometric shape, particularly a rectangular shape.

[0024] In certain embodiments, the connecting seat comprises a third cross-sectional area, wherein the third cross-sectional area essentially comprises the same shape as the first partial cross-sectional area and/or the second partial cross-sectional area. In particular, the first partial cross-sectional area and/or the second partial cross-sectional area is greater than the third cross-sectional area of the connecting seat.

[0025] In certain embodiments, the connecting seat in the first configuration is rotated with respect to the second configuration, particularly by an angle of 25° to 125°, more particularly 80° to 100°, most particularly 90°.

[0026] In certain embodiments, the configuration of the combined lift table is changeable by removing the connecting seat from the slot, rotating the connecting seat, particularly by an angle of 25° to 125°, more particularly 80° to 100°, most particularly 90°, and reinserting the connecting seat into the slot. In particular, the combined lift table can be converted from the first configuration to the second configuration or vice versa in this manner.

[0027] In certain embodiments, the base comprises a stepping frame 1, and/or a stepping frame 2, wherein the short bottom frame tube is accessible from the exterior by means of the stepping frame 1 and/or the stepping frame 2 in the second configuration of the combined lift table, particularly such that the desktop frame, when inserted in the slot in the first position, is movable, particularly tiltable, more particularly unidirectionally, by applying a mechanical force to the short bottom frame tube.

[0028] In certain embodiments, the base comprises a long oblique supporting tube 2, which mechanically connects the stepping frame 1 to the long supporting tube 2, and/or a long oblique supporting tube 4, which mechanically connects the stepping frame 2 to the long supporting tube 4.

[0029] Advantageously, the connecting seat can be tilted unidirectionally by means of the stepping frame, which allows to conveniently pull the connecting seat out of the slot for adjusting the height. When the connecting seat is inserted in slot 2 and 4, one can adjust the height by stepping on the short bottom tube of the desktop frame on the connecting seat. In this way, the connecting seat can tilt unidirectionally, and it is also more convenient to pull it out.

[0030] In certain embodiments, the base comprises a long supporting tube 1, at least one short supporting tube 1, a long supporting tube 3, and at least one short supporting tube 3, which constitute limiting segments of the first partial cross-sectional area, such that the connecting seat contacts the long supporting tube 1, the at least one short supporting tube 1, the long supporting tube 3, and the at least one short supporting tube 3 in the first configuration of the combined lift table.

[0031] In certain embodiments, the base comprises a long supporting tube 2, at least one short supporting tube 2, a long supporting tube 4, and at least one short supporting tube 4, which constitute limiting segments of the second partial cross-sectional area, such that the connecting seat contacts the long supporting tube 2, the at least one short supporting tube 2, the long supporting tube 4, and the at least one short supporting tube 4 in the second configuration of the combined lift table.

[0032] Advantageously, since part of the slot is formed by single-sided tubes arranged at the top of the base, the base is very light and produces less friction during inserting and unplugging the connecting seat from the base. In addition, the base is easy and quick to assemble and disassemble.

[0033] In certain embodiments, the base comprises at least one lower frame tube, at least one top frame tube, and a long oblique supporting tube 1 and/or a long oblique supporting tube 3, wherein the lower frame tube and the top frame tube are mechanically connected by the long oblique supporting tube 1, and/or the long oblique supporting tube 3, particularly wherein the long oblique supporting tube 1, and/or the long oblique supporting tube 3 is positioned at an angle α from 2° to 30°, preferably 2° to 10° with respect to the total height of the combined lift table. In particular, the lower frame tube and the top frame tube are arranged parallel to each other.

[0034] Advantageously, the long oblique supporting tube 1 and/or the long oblique supporting tube 3 provides structural strength to the bottom surface to prevent distortion under pressure, which allows the connecting seat to be pulled out or inserted properly.

[0035] In certain embodiments, the base comprises two short supporting tubes 1 and two short supporting tubes 3, and/or two short supporting tubes 2 and two short supporting tubes 4.

[0036] In certain embodiments, each short supporting tube 1 is mechanically connected to a respective end of the long supporting tube 1, and/or each short supporting tube 3 is mechanically connected to a respective end of the long supporting tube 3.

[0037] In certain embodiments, each short supporting tube 2 is mechanically connected to a respective end of the long supporting tube 2, and/or each short supporting tube 4 is mechanically connected to a respective end of the long supporting tube 4.

[0038] In certain embodiments, one of the two short supporting tubes 1 is mechanically connected to one of the two short supporting tubes 2, and/or one of the two short supporting tubes 2 is mechanically connected to one of the two short supporting tubes 3, and/or one of the two short supporting tubes 3 is mechanically connected to one of the two short supporting tubes 4, and/or one of the two short supporting tubes 4 is mechanically connected to one of the two short supporting tubes 1.

[0039] In certain embodiments, the base comprises a short oblique supporting tube 1, which is mechanically connected to the vertical supporting tube 1, and to the short supporting tube 1 and/or to the short supporting tube 2.

[0040] In certain embodiments, the base comprises a short oblique supporting tube 2, which is mechanically connected to the vertical supporting tube 2, and to the short supporting tube 2 and/or to the short supporting tube 3.

[0041] In certain embodiments, the base comprises a short oblique supporting tube 3, which is mechanically connected to the vertical supporting tube 3, and to the short supporting tube 3 and/or to the short supporting tube 4.

[0042] In certain embodiments, the base comprises a short oblique supporting tube 4, which is mechanically connected to the vertical supporting tube 4, and to the short supporting tube 4 and/or to the short supporting tube 1.

[0043] Advantageously, the short oblique supporting tube provides structural strength to the top surface of the base, so as to prevent it from being distorted due to an external force, which would interfere with inserting and unplugging of the connecting seat.

[0044] In certain embodiments, the desktop frame, and/or the base, and/or the connecting seat comprise a frame structure formed by tubes.

[0045] Advantageously, a connecting seat formed by tubes is characterized by a light weight, making it easy to adjust.

[0046] In certain embodiments, the connecting seat comprises four vertical supporting tubes, which are particularly vertically arranged, two long bottom tubes, which are particularly horizontally arranged, and two short bottom frame tubes, which are particularly horizontally arranged.

[0047] In certain embodiments, the top surface of the base is formed by four top frame tubes, wherein each top frame tube is mechanically connected to the respective long supporting tube 1, long supporting tube 2, long supporting tube 3, or long supporting tube 4 by means of a respective auxiliary supporting tube.

[0048] Advantageously, the auxiliary supporting tube provides structural strength to the bottom surface of the base to prevent distortion under pressure, which allows the connecting seat to be pulled out or inserted properly.

[0049] Wherever alternatives for single separable features are laid out herein as "embodiments", it is to be understood that such alternatives may be combined freely to form discrete embodiments of the invention disclosed herein.

[0050] Compared with the prior art, the combined lift table according to the present invention has the following advantages:

[0051] The connecting seat of the bottom surface of the desktop frame of the combined lift table is connected to the slot of the base. Particularly, since there are two groups of supporting rods with different heights inside the slot, the combined lift table can be used at two different heights, which make it advantageous in accommodating the demands of leisure, entertainment, and daily life.

[0052] Since the desktop frame and the base of the combined lift table are comprised of a frame structure formed by tubes, the combined lift table comprises a light weight, and a high structural strength, which makes the combined lift table easy to carry, and allows a long service life.

[0053] The invention is further illustrated by the following examples and figures, from which further embodiments and advantages can be drawn. This example is meant to illustrate the invention but not to limit its scope.

Fig. 1

shows a schematic diagram of the structure of the desktop frame of the combined lift table.

Fig. 2

shows a schematic diagram of the structure of the base of the combined lift table.

Fig. 3, 6 and 7

show top views of the structure of the base of the combined lift table.

Fig. 4

shows a combination state 1 of the desktop frame and the base of the combined lift table - a combined lift table in the first configuration.

Fig. 5

shows a combination state 2 of the desktop frame and the base of the combined lift table - a combined lift table in the second configuration.

[0054] This product has the following features: the desktop frame which has a connecting seat in the form of rectangular block of the and the hollow base; the top surface of the base is set with a cross shaped groove for inserting the connecting seat, wherein the cross shaped groove comprises a vertically arranged slot 1, slot 2, slot 3 and slot 4; slot 1 and 3, slot 2 and slot 4 are arranged in the opposite direction; the middle of slot 1 there is support rod 1 to support the connecting seat, while in the middle of slot 3 there is support rod 3 to support the connecting seat; both supporting rod 1 and 3 are transversely arranged on the inner cavity of the base, and supporting road 1 and 3 are located at the same height.

[0055] In daily use of the technical scheme, the connecting seat of the desktop frame can be inserted into the rectangular groove formed by slot 1 and 3, or into the one formed by slot 2 and 4. Since the groove formed by slot 1 and 3 has the supporting rod 1 and 3 located in the inner cavity of the base in the middle position, the height of the desktop frame when the connecting seat is set in the rectangular groove formed by slot 1 and 3 is over the height when the connecting seat is set in the rectangular groove formed by slot 2 and 4, so as to realize the lifting up and down by adjusting the desktop frame. This design, free of the drive of mechanical structure, is easy to operate and has low failure rate.

[0056] In above lift table, the said connecting seat is frame structure made of pipes. It comprises four vertically arranged vertical support tubes, two transversely arranged short tubes of the table frame and two horizontally arranged long bottom tubes, and the four tubes form rectangular frame. The connecting seat of the tubes is lighter, making it easier to adjust.

[0057] In the above lift table, when the connecting seat is inserted into slot 1 and 3, the said support rod 1 and 3 are located just below one short tube respectively, and the said support rod 1 and 3 has at least one buckle to connect the short tubes. Since the connecting seat is buckled to the base, it can ensure the structure strength and the stability of the connection between the two.

[0058] In above lift table, there is the supporting rod 2 and 4 arranged inside the bottom of the cavity of the base to supporting the connecting seat, and the supporting rod 2 and 4 are arranged horizontally at the same height. When the connecting seat is inserted in the rectangle groove formed by slot 1 and 3, the connecting seat is arranged on the supporting rod 2 and 4 to prevent them from touching the floor.

[0059] In the above lift table, when the connecting seat is inserted into slot 2 and 4, the said support rod 2 and 4 are located just below one long tube respectively, and the said support rod 2 and 4 has at least one buckle to connect the long tubes. Since the connecting seat is buckled to the base, it can ensure the structure strength and the stability of the connection between the two.

[0060] In the above lift table, the said slot 2 has one long supporting tube 2 to form the groove and two short supporting tube 2 to form the groove walls. The two short supporting tubes 2 are respectively connected to one end of the long supporting tube 2. The said slot 4 comprises a long supporting tube 4 to form the groove bottom and two short supporting tubes 4 to form the groove walls, while the two short supporting tubes 4 are connected to one end of the long supporting tube 4 respectively. Since slot 2 and 4 are formed with the single-sided pipes arranged at the top of the base, it is very light and has smaller friction in inserting and unplugging. It is easy and quick to assemble and disassemble.

[0061] In the above lift table, the said slot 1 has one long supporting tube 1 to form the groove and two short supporting tube 1 to form the groove walls. The two short supporting tubes 1 are respectively connected to one end of the long supporting tube 1. The two short supporting tubes 1 are connected to one end of the long supporting tube 1 vertically arranged downwardly respectively.

[0062] Both ends of the said supporting rod 1 are connected to the middle of the two vertical supporting tubes 1. The other end of one short supporting tube 1 is connected to short supporting tube 2, and short supporting tube 1 and 2 are connected with an obliquely arranged downwardly short oblique supporting tube 1. Both ends of the said supporting tube 1 are connected to the middle of the two vertical supporting tubes 1. The other end of one short supporting tube 1 is connected to short supporting tube 2, and short supporting tube 1 and 2 are connected with an obliquely arranged downwardly short oblique supporting tube 1. The lower end of the said oblique short supporting tube 2 is connected to the vertical supporting tube 1.The said slot 3 comprises a long supporting tube 3 and to form the groove and two short supporting tube 3 to form the groove walls.

[0063] The two short supporting tubes 3 are respectively connected to one end of the long supporting tube 3. The two short supporting tubes 3 are connected to one end of the vertical supporting tube 2 vertically arranged respectively. Both ends of the said supporting rod 3 are connected to the middle of the two vertical supporting tubes 3. The other end of one short supporting tube 3 is connected to short supporting tube 2, and short supporting tube 3 and 2 are connected with an obliquely arranged downwardly short oblique supporting tube 4. Both ends of the said supporting tube 4 are connected to the middle of the two vertical supporting tubes 3. The other end of one short supporting tube 3 is connected to short supporting tube 4, and short supporting tube 3 and 4 are connected with an obliquely arranged downwardly short oblique supporting tube 3. The lower end of the short oblique supporting tube is connected to the vertical supporting tube 3.

[0064] Since slot 2 and 4 are formed with the single-sided pipes arranged at the top of the base, it is very light and has smaller friction in inserting and unplugging. It is easy and quick to assemble and disassemble. In addition, the short oblique supporting tube can ensure the structure strength of the top surface of the base so as to prevent it from being distorted due to external force making it unable to insert and unplug.

[0065] In the above combined lift table, the said base, corresponding to the bottom side of the side walls of slot 2, has a stepping frame 1 which is connected to the long supporting tube 2 with a long oblique supporting tube 2. The said base, corresponding to the bottom side of the side walls of slot 4, has a stepping frame 2 formed with pipes. The stepping frame 2 is connected to the long supporting tube 4 with a long oblique supporting tube 4.

[0066] When the connecting seat is inserted in slot 2 and 4, one can adjust the height by stepping on the short bottom tube of the desktop frame on the connecting seat. In this way, the connecting seat can tilt unidirectionally, and it is also more convenient to pull it out.

[0067] In the above combined lift table, the said base is a frame structure formed by pipes. The bottom surface of the said base is formed with four bottom pipes. The said long supporting tube 1 is connected to its corresponding bottom frame pipe through a long oblique supporting tube 1, while the said long supporting tube 3 is connected to its corresponding bottom frame pipe through a long oblique supporting tube 3. The long oblique supporting tube 1 and 3 can support the structure strength of the bottom surface to prevent it from being unable to be pulled out or inserted properly as a result of distortion under pressure.

[0068] In the combined lift table, the top surface of the said base is formed by four top frame tubes, while the said long supporting tubes 2, 3, and 4 are connected to their corresponding frame tube through an auxiliary supporting tube. The auxiliary supporting tube can support the structure strength of the bottom surface to prevent it from being unable to be pulled out or inserted properly as a result of distortion under pressure.

[0069] Compared with current technology, the utility model has the following advantages:

1. In the utility model, the connecting seat of the bottom surface of the desktop frame is connected to the cross-shaped plug slot of the base. Since there are two groups of supporting rods with different heights inside the plug slot, the model can be used at two different heights, which make it better to accommodate the demands of leisure, entertainment and daily life.

2. Since the desktop frame and base of the utility model are of the frame structure formed by pipes, it has the features of light in quality, easy to carry, higher in structure strength, and long service life.

Description of drawings

[0070] 

Fig. 1 is the schematic diagram of structure of the desktop frame of the utility model.

Fig. 2 is the schematic diagram of structure of the base of the utility model.

Fig. 3 is the top view of structure of the base of the utility model.

Fig. 4 is the combination state 1 of the desktop frame and the base in the utility model.

Fig. 5 is the combination state 2 of the desktop frame and the base in the utility model.

Detailed description of the Figures

[0071] Fig. 1 shows a desktop frame 1 with a bottom surface of the desktop frame 1 comprising a connecting seat 3 with a rectangular cross-section having a third cross-sectional area C, and a frame height h_f, wherein the connecting seat 3, which is made of pipes, comprises four vertically arranged vertical supporting tubes 31, two transversely arranged short bottom frame tubes 32 of the table frame, and two horizontally arranged long bottom tubes 33, wherein the four tubes form a rectangular frame.

[0072] Fig. 2 and Fig. 3 show a base 2 comprising a hollow structure formed by pipes, which comprises tubes. The top surface of the base is formed by four top frame tubes 2b, while the bottom surface of the base is formed by four lower frame tubes 2a. The top surface of the base 2 comprises a cross-shaped slot 4 for inserting the connecting seat 3. The cross-shaped slot 4 comprises vertically arranged slots 41, 42, 43, and 44, which are located at the four corners of the cross-shaped slot 4. In addition, slot 41 and 43, 42 and 44 are arranged opposite to each other. In the central portion of slot 41, a first supporting rod 1 411 for supporting the connecting seat 3 is positioned, and in the central portion of slot 43, a first supporting rod 3 431 for supporting the connecting seat 3 is positioned.

[0073] The first supporting rod 1 411 and the first supporting rod 3 431 are arranged laterally in the cavity of the base 2, and the first supporting rod 1 411 and the first supporting rod 3 431 are positioned at the same height. The first supporting rod 1 411 and the first supporting rod 3 431 are arranged at a maximal vertical distance a with respect to the lower boundary of the base. The second supporting rod 2 45 and the supporting rod 4 46 are arranged inside the bottom of the cavity of the base 2 to support the connecting seat 3, and the second supporting rod 2 45 and the second supporting rod 4 46 are arranged at the same height.

[0074] The said slot 2 42 comprises a long supporting tube 2 421 forming a groove and two short supporting tubes 2 422 forming the groove walls. The two short supporting tubes 2 422 are respectively connected to one end of the long supporting tube 2 421.

[0075] The said slot 4 44 comprises a long supporting tube 4 441 forming a groove bottom and two short supporting tubes 4 442 forming the groove walls, while the two short supporting tubes 4 442 are connected to one end of the long supporting tube 4 441, respectively.

[0076] The slot 3 43 comprises two long supporting tubes 3 432 constituting a groove bottom and two short supporting tubes 3 433 constituting the groove walls. One end of each of the two short supporting tubes 3 433 is connected to one top end of the long supporting tube 3 432 respectively, while both short supporting tubes 3 433 are connected to a respective vertically arranged vertical supporting tube 2 434, wherein both ends of the first supporting rod 3 431 are connected to the central portion of the two vertical supporting tubes 2 434. The other end of one of the short supporting tubes 3 433 is connected to the short supporting tube 2 422, and at the position, where the short supporting tube 3 433 and the short supporting tube 2 422 are connected, an obliquely arranged short oblique supporting tube 4 4d is positioned, the lower end of which is connected to the vertical supporting tube 2 434.

[0077] The other end of the second short supporting tube 3 433 is connected to the short supporting tube 4 442. In addition, at the position, where the short supporting 3 433 and the short supporting tube 4 442 are connected, an obliquely arranged short oblique supporting tube 3 4c is positioned, the lower end of which is connected to the vertical supporting tube 2 434.

[0078] The slot 3 43 comprises a long supporting tube 3 432 constituting the groove bottom and two short supporting tubes 3 433 constituting the groove walls. One end of each of the two short supporting tubes 3 433 is connected to one top end of the long supporting tube 3 432 respectively, while both short supporting tubes 3 433 are connected to a respective vertically arranged vertical supporting tube 2 434. Both ends of the first supporting rod 3 431 are connected to the central portion of the two vertical supporting tubes 2 434. The other end of one of the short supporting tubes 3 433 is connected to the short supporting tube 2 422, and at the position, where the short supporting tube 3 433 and the short supporting tube 2 422 are connected, an obliquely arranged short oblique supporting tube 4 4d is positioned, the lower end of which is connected to the vertical supporting tube 2 434. The other end of the second short supporting tube 3 433 is connected to the short supporting tube 4 442. In addition, at the position, where the short supporting 3 433 and the short supporting tube 4 442 are connected, an obliquely arranged short oblique supporting tube 3 4c is positioned, the lower end of which is connected to the vertical supporting tube 2 434.

[0079] The base 2 comprises a stepping frame 1 4e formed by tubes, wherein the stepping frame 1 4e is positioned at the bottom side of the side walls of slot 2 42. The stepping frame 1 4e is connected to the long supporting tube 2 421 by means of a long oblique supporting tube 2 2e.

[0080] Furthermore, the base 2 comprises a stepping frame 2 4f formed by tubes, wherein the stepping frame 2 4f is positioned at the bottom side of the side walls of slot 4 44. The stepping frame 2 4f is connected to the long supporting tube 4 441 by means of a long oblique supporting tube 4 2g.

[0081] Moreover, the long supporting tube 1 412, the long supporting tube 2 421, the long supporting tube 3 432, and long supporting tube 4 441 are connected respectively to their corresponding top frame tube 2b by means of a respective auxiliary supporting tube 2c. The long supporting tube 1 412 and its corresponding lower frame tube 2a are connected by means of a long oblique supporting tube 1 2d, whereas the long supporting tube 3 432 and its corresponding bottom frame tube 2a are connected by means of a long oblique supporting tube 3 2f.

[0082] Fig. 4 depicts the combined lift table in the first configuration, wherein the connecting seat 3 of the desktop frame 1 is inserted in the slot 4 of the base 2 in a first position, and Fig. 5 depicts the combined lift table in the second configuration, wherein the connecting seat 3 of the desktop frame 1 is inserted in the slot 4 of the base 2 in a second position. The second supporting rod 2 45 and the second supporting rod 4 46 are connected to the respective long bottom tube 33 by means of the buckles 2 6, and the first supporting rod 1 411 and the first supporting rod 3 431 are connected to the respective short bottom tube 32 by means of the buckles 1 5.

[0083] As shown in Fig. 4, when the connecting seat 3 is inserted into slot 2 44 and slot 4 44, corresponding to the second position, the desktop frame 1 is in a low position, corresponding to the second configuration of the lift table. Therein, the second supporting rod 2 45 and the second supporting rod 4 46 are positioned directly below and parallel to a respective long bottom tube 33, which is clamped into the buckle 2 6 in order to arrest its position, providing stability to the combined lift table. Fig. 4 further shows the frame height h_f of the desktop frame 1 and the maximal vertical distance a of the first supporting rod 1 411 and the first supporting rod 3 431 with respect to the lower boundary of the base 2. In the depicted second configuration, the total height h_t of the combined lift table has the value h₂.

[0084] As shown in Fig. 5, when the connecting seat 3 is inserted into slot 1 41 and slot 4 43, corresponding to the first position, the desktop frame 1 is in a high position, corresponding to the first configuration of the lift table. Therein, the first supporting rod 1 411 and the first supporting rod 3 431 are positioned directly below and parallel to a respective short bottom frame tube 32, which is clamped into the buckle 1 5 in order to arrest its position, providing stability to the combined lift table. Fig. 5 further shows the frame height h_f of the desktop frame 1 and the maximal vertical distance a of the first supporting rod 1 411 and the first supporting rod 3 431 with respect to the lower boundary of the base 2. In the depicted first configuration, the total height h_t of the combined lift table has the value h₁, which is equal to the sum of the frame height h_f and the maximal vertical distance a.

[0085] In the embodiment, if one wants to insert, he/she just needs to insert downwardly to insert the desktop frame short bottom tube 32 into the buckle 1 5, or the long tube 33 into buckle 2 6. In order to plug the connecting seat out of the desktop frame from the low position, i.e., when the connecting seat 3 is inserted into the slot 2 42 and the slot 4 44, the connecting seat 3 can be tilted unidirectionally by inserting a foot into the stepping frame 1 4e or the stepping frame 2 4g, which allows to easily pull the connecting seat 3 out of the slot 4. One can just step his/her foot onto the stepping frame to step on the desktop frame short tube 32 of the connecting seat 3, so as to make the connecting seat 3 tilt unidirectionally, easier to plug out.

[0086] Fig. 6 and Fig. 7 are top views of the base 2 analogous to Fig. 3. Therein, the first partial cross-sectional area A of the slot 4 of the base 2 is depicted in Fig. 6, and the second cross-sectional area B of the slot 4 of the base 2 is depicted in Fig. 7. The first partial cross-sectional area A and the second cross-sectional area B both have a rectangular shape and partially overlap. The dimensions and shape of the first partial cross-sectional area A are such that the connecting seat 3 is insertable in the first partial cross-sectional area A in the first configuration of the combined lift table, and the dimensions and shape of the second partial cross-sectional area B are such that the connecting seat 3 is insertable in the second partial cross-sectional area B in the second configuration of the combined lift table.

[0087] The embodiments described here are only application examples of the invention. The technicians in the art to which the invention belongs can modify or supplement it or adopt similar methods to replace it toward the embodiments described here, but none of such operations will deviate or surpass the scope defined in the claims of the invention.

List of reference signs

1	Desktop frame
2	Base
2a	Lower frame tube
2b	Top frame tube
2c	Auxiliary supporting tube
2d	Long oblique supporting tube 1
2e	Long oblique supporting tube 2
2f	Long oblique supporting tube 3
2g	Long oblique supporting tube 4
3	Connecting seat
31	Vertical supporting tube
32	Short bottom frame tube
33	Long bottom tube
4	Cross-shaped plug slot- slot
41	Slot 1
411	First supporting rod 1
412	Long supporting tube 1
413	Short supporting tube 1
414	Vertical supporting tube 1
42	Slot 2
421	Long supporting tube 2
422	Short supporting tube 2
43	Slot 3
431	First supporting rod 3
432	Long supporting tube 3
433	Short supporting tube 3
434	Vertical supporting tube 2
44	Slot 4
441	Long supporting tube 4
442	Short supporting tube 4
45	Supporting rod 2 - Second supporting rod 2
46	Supporting rod 4 - Second supporting rod 4
4a	Short oblique supporting tube 1
4b	Short oblique supporting tube 2
4c	Short oblique supporting tube 3
4d	Short oblique supporting tube 4
4e	Stepping frame 1
4f	Stepping frame 2
5	Buckle 1
6	Buckle 2
ht	Total height
h1	First value
h2	Second value
hf	Frame height
a	Maximal vertical distance
A	First partial cross-sectional area
B	Second partial cross-sectional area
C	Third cross-sectional area

Claims

1. A combined lift table comprising

• a desktop frame (1) comprising a connecting seat (3),

• a base (2) comprising a slot (4), wherein the connecting seat (3) of the desktop frame (1) is insertable in the slot (4),

wherein the desktop frame (1) has a frame height (h_f) defined as the vertical extension from the upper boundary of the desktop frame (1) to the lower boundary of the connecting seat (3), when the connecting seat (3) is inserted in the slot (4) of the base (2), and wherein the combined lift table has a total height (h_t) defined as the maximal extension from the upper boundary of the desktop frame (1) to the lower boundary of the base (2), when the connecting seat (3) is inserted in the slot (4) of the base (2),
characterised in that
the base (2) comprises at least one first supporting rod 1 (411) and/or at least one first supporting rod 3 (431), positioned at a maximal vertical distance (a) from the lower boundary of the base (2), wherein the combined lift table comprises at least two configurations, wherein

• according to a first configuration the connecting seat (3) is inserted in the slot (4) in a first position, such that the connecting seat (3) rests on the at least one first supporting rod 1 (411) and/or on the at least one first supporting rod 3 (431), resulting in a first value (h₁) of the total height (h_t) equal to h₁=h_f+a, and

• according to a second configuration the connecting seat (3) is inserted in the slot (4) in a second position, such that the connecting seat (3) does not contact the at least one first supporting rod 1 (411) and the at least one first supporting rod 3 (431), resulting in a second value (h₂) of the total height (h_t), wherein h₁>h₂.

2. The combined lift table according to claim 1, wherein the connecting seat (3) comprises at least one short bottom frame tube (32), which rests on the first supporting rod 1 (411) and/or the first supporting rod 3 (431) in the first configuration of the combined lift table, particularly wherein the short bottom frame tube (32) is arranged parallel to the first supporting rod 1 (411) and/or the first supporting rod 3 (431).

3. The combined lift table according to claim 2, wherein the combined lift table comprises at least one buckle 1 (5), which is adapted to mechanically connect the short bottom frame tube (32) to the first supporting rod 1 (411) and/or the first supporting rod 3 (431).

4. The combined lift table according to any one of the preceding claims, wherein the connecting seat (3) rests on a surface, particularly a floor, in the second configuration of the combined lift table, when the combined lift table is positioned on the surface.

5. The combined lift table according to any one of the claims 1 to 3, wherein the base (2) comprises at least one second supporting rod 2 (45) and/or at least one second supporting rod 4 (46), and wherein the connecting seat (3) rests on the at least one second supporting rod 2 (45) and/or on the at least one second supporting rod 4 (46) in the second configuration of the combined lift table.

6. The combined lift table according to claim 5, wherein the connecting seat (3) comprises at least one long bottom tube (33), which rests on the second supporting rod 2 (45) and/or the second supporting rod 4 (46) in the second configuration of the combined lift table, particularly wherein the long bottom tube (33) is positioned parallel to the second supporting rod 2 (45).

7. The combined lift table according to claim 6, wherein the base (2) comprises at least one buckle 2 (6), which is adapted to mechanically connect the long bottom tube (33) to the second supporting rod 2 (45) and/or to the second supporting rod 4 (46).

8. The combined lift table according to any one of the preceding claims, wherein the slot (4) comprises at least a first partial cross-sectional area (A) and a second partial cross-sectional area (B), and wherein the connecting seat (3) is insertable in the first partial cross-sectional area (A) in the first configuration of the combined lift table, and wherein the connecting seat (3) is insertable in the second partial cross-sectional area (B) in the second configuration of the combined lift table.

9. The combined lift table according to claim 8, wherein the first partial cross-sectional area (A) and the second partial cross-sectional area (B) each comprise a geometric shape, particularly a rectangular shape.

10. The combined lift table according to claim 8 or 9, wherein the connecting seat (3) comprises a third cross-sectional area (C), wherein the third cross-sectional area (C) essentially comprises the same shape as the first partial cross-sectional area (A) and/or the second partial cross-sectional area (B).

11. The combined lift table according to any one of the preceding claims, wherein the connecting seat in the first configuration is rotated with respect to the second configuration, particularly by an angle of 25° to 125°, more particularly 80° to 100°, most particularly 90°.

12. The combined lift table according to any one of the claims 2 to 9, wherein the base (2) comprises a stepping frame 1 (4e), and/or a stepping frame 2 (4f), wherein the short bottom frame tube (32) is accessible from the exterior by means of the stepping frame 1 (4e) and/or the stepping frame 2 (4f) in the second configuration of the combined lift table.

13. The combined lift table according to any one of the preceding claims, wherein the base (2) comprises a long supporting tube 1 (412), at least one short supporting tube 1 (413), a long supporting tube 3 (432), and at least one short supporting tube 3 (433), which constitute limiting segments of the first partial cross-sectional area (A), such that the connecting seat (3) contacts the long supporting tube 1 (412), the at least one short supporting tube 1 (413), the long supporting tube 3 (432), and the at least one short supporting tube 3 (433) in the first configuration of the combined lift table.

14. The combined lift table according to any one of the preceding claims, wherein the base (2) comprises a long supporting tube 2 (421), at least one short supporting tube 2 (422), a long supporting tube 4 (441), and at least one short supporting tube 4 (442), which constitute limiting segments of the second partial cross-sectional area (B), such that the connecting seat (3) contacts the long supporting tube 2 (421), the at least one short supporting tube 2 (422), the long supporting tube 4 (441), and the at least one short supporting tube 4 (442) in the second configuration of the combined lift table.

15. The combined lift table according to any one of the preceding claims, wherein the base (2) comprises at least one lower frame tube (2a), at least one top frame tube (2b), and a long oblique supporting tube 1 (2d) and/or a long oblique supporting tube 3 (2f), wherein the lower frame tube (2a) and the top frame tube (2b) are mechanically connected by the long oblique supporting tube 1 (2d), and/or the long oblique supporting tube 3 (2f), particularly wherein the long oblique supporting tube 1 (2d), and/or the long oblique supporting tube 3 (2f) is positioned at an angle α from 2° to 30°, preferably 2° to 10° with respect to the total height (h_t) of the combined lift table.

Drawing