CONTACT SYSTEM, CONTACT UNIT AND ISOLATING SWITCH

Abstract

 Provided are a contact system, a contact unit and a circuit breaker. The contact system includes a moving contact assembly arranged in a shell and a pair of static contact assemblies. The moving contact assembly includes an arc isolation portion which is assembled rotatably. The arc isolation portion is provided with a contact groove inside. A pair of moving contact portions are arranged in the contact groove. Each static contact assembly includes a static contact portion which extends into the contact groove. The arc isolation portion rotates and drives the pair of moving contact portions to be in contact with or separated from the static moving portion in the contact groove. An edge of the arc isolation portion is also provided with a pair of mounting grooves which are communicated with the contact groove, and each mounting groove is at least reserved with a notch for the static contact portion to be placed at one end surface of the arc isolation portion. According to the present invention, when the contact system is assembled, the static contact portion of the static contact assembly is arranged correspondingly from the notch and can be placed in the contact groove at an appropriate angle without lifting the static contact portion, which simplifies the step of assembling the contact system, is convenient in operation, can achieve automatic assembly and is conducive to reducing the cost.

Description

TECHNICAL FIELD

[0001] The present invention relates to the field of low-voltage electrical appliances, in particular to a contact system, a contact unit and an isolation switch.

BACKGROUND

[0002] With the rapid development of AC and DC electrical appliance industry, rotary isolation switches have been widely used. In the existing rotary isolation switch, an arc isolation portion of a moving contact assembly is completely circular. During installation, static contact portions of static contact assemblies located on both sides need to be lifted and plugged into the arc isolation portion at an appropriate angle for cooperating with a moving contact portion of the moving contact assembly, so the installation process is complicated. In addition, the existing rotary isolation switch cannot be applied to an automatic production line to realize the automatic assembly.

SUMMARY

[0003] An object of the present invention is to overcome at least one defect of the prior art and provide a contact system, a contact unit and an isolation switch.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:
a contact system, comprising a moving contact assembly arranged in a shell and a pair of static contact assemblies, the moving contact assembly comprises an arc isolation portion which is assembled rotatably; the arc isolation portion is provided with a contact groove inside; a pair of moving contact portions are arranged in the contact groove; each static contact assembly comprises a static contact portion which extends into the contact groove; the arc isolation portion rotates and drives the pair of moving contact portions to be in contact with or separated from the static moving portion in the contact groove; and an edge of the arc isolation portion is further provided with a pair of mounting grooves which are communicated with the contact groove; and each mounting groove is reserved with a notch for the static contact portion to be placed at least at one end surface of the arc isolation portion.

[0005] Further, each moving contact portion is located in the contact groove between the two mounting grooves, and the pair of moving contact portions form a rotationally symmetrical structure with respect to an axis of the arc isolation portion.

[0006] Further, each mounting groove reserves the notch on two end surfaces of the arc isolation portion respectively, so that the mounting groove penetrates through the contact groove in an axis direction parallel to the arc isolation portion.

[0007] Further, a mounting cavity which is formed in a radial direction of the arc isolation portion is formed in the arc isolation portion; both ends of the mounting cavity are respectively communicated with the contact groove; a moving contact bridge is assembled in the mounting cavity; and both ends of the moving contact bridge are respectively located at a junction between the mounting cavity and the contact groove as the moving contact portion.

[0008] Further, at least two first positioning portions are arranged at one end of the arc isolation portion, and the first positioning portions are symmetrical with respect to an axis of the arc isolation portion; at least two second positioning portions are arranged at the other end of the arc isolation portion; and the second positioning portions are connected to the first positioning portions of the arc isolation portions in the adjacent moving contact assemblies.

[0009] Further, the arc isolation portion comprises a first arc isolation plate and a second arc isolation plate which are spaced oppositely; a gap as the contact groove is formed between an edge of the first arc isolation plate and an edge of the second arc isolation plate; a pair of first notch grooves are respectively formed in the edges on both sides of the first arc isolation plate; a pair of second notch grooves are respectively formed in the edges on both sides of the second arc isolation plate; and the first notch grooves and the second notch grooves are in one-to-one correspondence to form the mounting grooves.

[0010] Further, the first arc isolation plate is in pluggable fit with the second arc isolation plate.

[0011] Further, a moving contact bridge is assembled between the first arc isolation plate and the second arc isolation plate in a limiting manner; the moving contact bridge is arranged in a radial direction of the arc isolation portion; and both ends of the moving contact bridge extend into the contact groove as the moving contact portions respectively.

[0012] Further, the moving contact bridge comprises two first conductive plates; a first conductive sheet is respectively formed at both ends of each first conductive plate, respectively; the middle parts of the two first conductive plates are connected; and the two first conductive sheets located at the same end of the two first conductive plates are spaced oppositely to form moving contact portions that can clamp the static contact portion.

[0013] Further, the static contact assembly comprises a second conductive plate; the second conductive plate is V-shaped as a whole; both end parts of the second conductive plate are bent and extend respectively to form a pair of wiring plates which are spaced oppositely; and a protruding region in the middle of the second conductive plate is used as the static contact portion; or
the static contact assembly comprises a third conductive plate; the middle part of the third conductive plate is bent, so that both ends of the third conductive plate are respectively located in two parallel planes; one end of the third conductive plate is used as a pin end; and a side of the other end of the third conductive plate extends outward to form a V-shaped static contact portion.

[0014] The present invention further provides a contact unit, comprising a shell, wherein the contact system as above mentioned is arranged in the shell.

[0015] Preferably, a pair of arc extinguishing grooves for assembling an arc extinguishing chamber are formed in the shell; a pair of assembling grooves for assembling static contact assemblies are also formed in the shell; and the arc extinguishing grooves are communicated with the assembling grooves in a one-to-one correspondence manner.

[0016] Preferably, one end of the assembling groove is communicated with the wiring groove formed in the side wall of the shell; the arc extinguishing groove is provided with a ventilation hole for communicating with the assembling groove; one end of the assembling groove opposite to the ventilation hole is enclosed by an arc isolation rib; and the arc isolation rib is used for preventing a high-temperature gas of the arc extinguishing chamber from burning the moving contact portion in an opening position.

[0017] Preferably, the shell comprises a base; an assembling cavity for assembling the contact system and the arc extinguishing chamber is formed on one side of the base; packaging structures which are matched with each other are arranged between the adj acent bases which are laminated; each packaging structure comprises a packaging wall and a packaging groove that are in pluggable fit with each other; the packaging wall is formed by protruding outward and extending in parallel from part of the edge of the outer side wall of the base; and the packaging groove is formed by recessing from part of the edge of the outer side wall of the base.

[0018] Preferably, the outer side wall surrounding each base is provided with a packaging wall and/or a packaging groove; a guard plate is arranged on part of the edge of the packaging wall in a protruding manner; a matching groove matched with the guard plate is formed in the packaging groove; and the guard plate and the matching groove are located on the outer side wall of the base corresponding to the static contact assembly.

[0019] Preferably, at least one pair of pressing bosses are arranged on the base away from the assembling cavity in a protruding manner, and the pressing bosses are used for pressing the static contact assemblies in the assembly cavities of the adjacent bases.

[0020] The present invention further provides an isolation switch, comprising an operating module and a contact module driven by an operating module, wherein the contact module comprises at least one layer of contact units as above mentioned.

[0021] According to the contact system, the contact unit and the isolation switch of the present invention, when the contact system is assembled, a static contact portion of a static contact assembly is arranged correspondingly from a notch and can be placed in a contact groove at an appropriate angle without lifting the static contact portion, which simplifies the step of assembling the contact system, is convenient in operation, can achieve automatic assembly and is conducive to reducing the cost.

[0022] In addition, each mounting groove is reserved with a notch at two end surfaces of an arc isolation portion respectively, so that the assembly process of the static contact assembly and the assembly operation of the moving contact assembly can be ordered randomly, thereby further simplifying the assembly process of the contact system.

[0023] In addition, the arc isolation portions of the adjacent two moving contact assemblies are correspondingly connected and located through a first positioning portion and a second positioning portion, and the first positioning portion and the second positioning portion are respectively located on both sides of an axis, so as to improve the rotational synchronization and positioning of the adjacent two moving contact assemblies.

[0024] In addition, an arc extinguishing groove, an assembling groove and a wiring groove are communicated, so that a high-temperature gas of the arc extinguishing chamber is discharged from the wiring groove, and less space in a shell is occupied. In addition, the arc extinguishing groove is communicated with the assembling groove through a ventilation hole, one end of the assembling groove opposite to the ventilation hole is enclosed by an arc isolation rib, and the arc isolation rib prevents the high-temperature gas of the arc extinguishing chamber from burning a moving contact portion in an opening position.

[0025] In addition, a packaging structure is arranged between two adjacent laminated bases, which is conducive to ensuring the airtightness of a contact module. In particular, a packaging wall and a packaging groove are respectively arranged around an outer side wall of each base, wherein the packaging wall is also provided with a guard plate, and the packaging groove is provided with a matching groove that matches with the guard plate, which is conducive to ensuring the plugging stability of the packaging structure.

BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 

FIG. 1 is a schematic structural diagram of an isolation switch in the present invention (a first embodiment);

FIG. 2 is a schematic structural diagram of a wiring groove and an operating hole of the isolation switch in the present invention (the first embodiment);

FIG. 3 is a schematic structural diagram of an operating module in the present invention (the first embodiment);

FIG. 4 is a schematic diagram of an operating module housing in the present invention;

FIG. 5 is a schematic structural diagram after a shell is removed from a contact module in the present invention (the first embodiment);

FIG. 6 is a schematic structural diagram of a contact unit in the present invention (the first embodiment);

FIG. 7 is a schematic diagram of an internal structure of the contact unit in the present invention (the first embodiment);

FIG. 8 is a schematic structural diagram of two contact units in the present invention (the first embodiment);

FIG. 9 is a schematic structural diagram of a base in the present invention (the first embodiment);

FIG. 10 is a schematic structural diagram of a moving contact assembly in the present invention;

FIG. 11 is a schematic structural diagram of a first arc isolation plate in the present invention (one end with a first positioning portion);

FIG. 12 is a schematic structural diagram of a first arc isolation plate in the present invention (one end with a second positioning portion);

FIG. 13 is a schematic structural diagram of a second arc isolation plate in the present invention;

FIG. 14 is a schematic structural diagram of a moving contact bridge in the present invention;

FIG. 15 is a schematic structural diagram of a first conductive plate in the present invention;

FIG. 16 is a schematic structural diagram of a second conductive plate in the present invention (the first embodiment);

FIG. 17 is a schematic structural diagram of an isolation switch in the present invention (a second embodiment);

FIG. 18 is a schematic diagram of the cooperation of shells of two contact units in the present invention (the second embodiment);

FIG. 19 is a schematic structural diagram of a contact unit in the present invention (the second embodiment);

FIG. 20 is a schematic diagram of an internal structure of the contact unit in the present invention (the second embodiment);

FIG. 21 is a schematic structural diagram of two contact units in the present invention (the second embodiment);

FIG. 22 is a schematic structural diagram of a base in the present invention (the second embodiment); and

FIG. 23 is a schematic structural diagram of a third conductive plate in the present invention (the second embodiment).

[0027] Reference symbols represent the following components:
α-contact module; 1-contact unit; 10-shell; 1011-rotating groove; 1012-assembling groove; 10121-wiring groove; 10122-operating hole; 1013-pin slot; 1014-packaging wall; 10141-guard plate; 1015-packaging groove; 10151-matching groove; 10161-positioning plate; 10162-fixed sub-groove; 10163-fixed boss; 1017-arc extinguishing groove; 10171-arc isolation rib; 10172-ventilation hole; 1018-pressing boss; 11-moving contact assembly; 110-arc isolation portion; 1101-first arc isolation plate; 11011-first notch groove; 11012-first positioning portion; 11013-second positioning portion; 1102-second arc isolation plate; 11021-second notch groove; 11022-through hole; 1103-contact groove; 1104-mounting groove; 1105-rotary supporting portion; 1106-mounting cavity; 11061-foolproof protrusion; 11071-buckle; 11072-clamping groove; 111-moving contact bridge; 1111-first conductive plate; 1112-mounting boss; 1113-mounting groove; 1114-foolproof groove; 112-moving contact portion; 1121-first conductive sheet; 120-static contact portion; 121-second conductive plate; 1211-wiring plate; 1212-wiring hole; 122-third conductive plate; 1221-pin end; 13-wiring assembly; 131-wiring screw; 132-crimping plate; 14-arc extinguishing chamber; b-operating module; 20-module housing; 21-operating mechanism; and 22-operating member.

DETAILED DESCRIPTION OF THE INVENTION

[0028] The specific implementations of a contact system, a contact unit and an isolation switch of the present invention will be further described below in conjunction with the embodiments given in the accompanying drawings. The contact system, the contact unit and the isolation switch of the present invention are not limited to the description of the following embodiments.

[0029] As shown in FIGS. 1-7 and 17, an isolation switch includes an operating module b and a contact module a driven by the operating module b. The operating module b is laminated with the contact module a. One end of an operating mechanism 21 is in driving connection with the contact module a as a driving end, and the other end of the operating mechanism 21 extends out of the module housing 20 as an operating end and used for driving from the outside. The contact module a includes at least one layer of contact units 1. Each contact unit 1 includes a shell 10. A contact system and a wiring assembly 13 that are connected to each other are assembled in the shell 10. The contact system is driven by the driving end to be opened and closed. The wiring assembly 13 is used for external wiring in conjunction with a wiring groove 10121 formed in a side wall of the shell 10. When the contact module a includes two or more contact units 1, the adjacent two contact units 1 are laminated, and the driving end may penetrate through the contact module a and is in linkage connection with each contact system, or may also be connected to the contact system of the adjacent contact unit 1, and the contact systems of the remaining contact units 1 are in linkage connection with each other so as to be opened and closed synchronously.

[0030] Specifically, as shown in FIGS. 5-8, 10 and 19-21, the contact system includes a moving contact assembly 11 which is assembled rotatably and a pair of static contact assemblies matched with the moving contact assembly 11. The moving contact assembly 11 includes an arc isolation portion 110 and a moving contact bridge 111 which are rotatably matched with the shell 10. The pair of static contact assemblies are respectively arranged on both sides of the moving contact assembly 11 (the arc isolation portion 110) and are connected to the wiring assemblies 13 respectively. A contact groove 1103 is formed in the arc isolation portion 110. A pair of moving contact portions 112 are arranged in the contact groove 1103. Each static contact assembly includes a static contact portion 120 extending into the contact groove 1103. The arc isolation portion 110 rotates and drives the pair of moving contact portions 112 to be in contact with or separated from the static contact portion 120 in the contact groove 1103. As shown in FIG. 10, in the present embodiment, the arc isolation portion 110 includes a first arc isolation plate 1101 and a second arc isolation plate 1102 spaced oppositely. A gap as the contact groove 1103 is arranged between an edge of the first arc isolation plate 1101 and an edge of the second arc isolation plate 1102. The moving contact bridge 111 is fixed between the first arc isolation plate 1101 and the second arc isolation plate 1102 and rotates with the arc isolation portion 110. The pair of moving contact portions 112 at both ends of the moving contact bridge 111 extend into the contact groove 1103. The moving contact portion 112 includes two first conductive sheets 1121 arranged at intervals (FIG. 14). The static contact portion 120, the first conductive sheet 1121 and an end face (i.e., a surface parallel to a radial section of the arc isolation portion 110) of the arc isolation portion 110 are approximately parallel. A driving end of the operating module b drives the moving contact assembly 11 to rotate in the shell 10, so that the pair of moving contact portions 112 are respectively in contact with or separated from the static contact portions 120 of a pair of static contact assemblies, so that the contact system can be opened or closed. That is, when the moving contact portion 112 is in contact with the static contact portion 120, the static contact portion 120 is plugged into the gap between the two first conductive sheets 1121, and the static contact portion 120 is clamped by the two first conductive sheets 1121 which return to an original state when they are separated.

[0031] An improvement point of the present application lies in that a pair of mounting grooves 1104 which are communicated with the contact groove 1103 are formed in an edge of the arc isolation portion 110, and each mounting groove 1104 is at least reserved with a notch for the static contact portion 120 to be placed on an end surface of the arc isolation portion 110. Each static contact portion 120 can be transferred from the mounting groove 1104 to the contact groove 1103 with the rotation of the arc isolation portion 110 and is used for cooperating with the moving contact portion 112. By means of such structure, when the contact system is assembled, the static contact portion 120 of the static contact assembly is arranged correspondingly from the notch and is placed in the contact groove 1103 at an appropriate angle without lifting the moving contact portion 120, which simplifies the step of assembling the contact system, is convenient in operation, can achieve automatic assembly and is conducive to reducing the cost.

[0032] Preferably, each mounting groove 1104 is reserved with a notch on two end surfaces of the arc isolation portion 110 respectively, so that the assembly process of the static contact assembly and the assembly process of the moving contact assembly 11 can be ordered randomly, which further simplifies the assembly process of the contact system. That is, when the mounting groove 1104 only reverses a notch on one end surface of the arc isolation portion 110, the contact system needs to be loaded into the shell 10 step by step during assembly. For example, when the notch is located on the upper end surface of the arc isolation portion 110, the moving contact assembly 11 needs to be assembled first, and the static contact portion 120 of the static contact assembly is then loaded from the notch. When the notch is located on the lower end surface of the arc isolation portion 110, the static contact assembly needs to be loaded first, and then the notch of the mounting groove 1104 is mounted corresponding to the static contact portion 120 of the static contact assembly. In addition, when the notches of the two mounting grooves 1104 correspond to different end surfaces, the contact system is assembled such that one static contact assembly is assembled first, then the moving contact assembly 11 is assembled, and finally the other static contact assembly is loaded. Through the above-mentioned arrangement of the mounting groove 1104, the static contact portion 120 can extend into the arc isolation portion 110 to separate arcs, and the assembly efficiency of the contact system is improved.

[0033] Preferably, at least two first positioning portions 11012 are arranged at one end of the arc isolation portion 110, and preferably, the two first positioning portions 11012 are symmetrical about an axis of the arc isolation portion 110, which is conducive to ensuring uniform stress. Of course, the number of the first positioning portions 11012 may also be more than two. At least two second positioning portions 11013 are arranged at the other end of the arc isolation portion 110. The second positioning portions 11013 are connected to the first positioning portions 11012 of the arc isolation portions 110 in the adjacent moving contact assemblies 11 in a one-to-one correspondence manner. The connection mode may adopt screw fastening connection or corresponding pluggable connection. The first positioning portions 11012 and the second positioning portions 11013 are respectively located on both sides of the axis, thereby improving the rotation synchronization and positioning of the adjacent two moving contact assemblies 11.

[0034] Further, each contact unit 1 further includes at least one arc extinguishing chamber 14. The number of grids of the arc extinguishing chamber 14 is selected cooperatively according to a current magnitude. An arc generated when the arc extinguishing contact system is opened is extinguished cooperatively by the arc extinguishing chamber 14. Of course, the arc extinguishing chamber 14 may also not be arranged. Preferably, as shown in FIGS. 5-8 and 19-21, each contact unit 1 includes a pair of arc extinguishing chambers 14. The arc extinguishing chambers 14 are arranged in a circumferential direction of the moving contact assemblies 11 and a pair of arc extinguishing chambers 14 form a rotationally symmetrical structure with respect to the moving contact assemblies 11. Each arc extinguishing chamber 14 is located between the static contact portion 120 and the moving contact portion 112 in an opening position, that is, on the outer side of a motion trajectory of the moving contact portion 112. Therefore, the arc generated when the moving contact assembly 11 and a pair of static contact assemblies are opened is respectively extinguished cooperatively by one arc extinguishing chamber 14, thereby improving the use safety.

[0035] Specifically, as shown in FIG. 9, an arc extinguishing groove 1017 and an assembling groove 1012 which are used for mounting the arc extinguishing chamber 14 and the static contact assembly are located in the shell 10 respectively, and the arc extinguishing groove 1017 is communicated with the assembling groove 1012. Preferably, a ventilation hole 10172 is formed between the arc extinguishing chamber 14 and the assembling groove 1012. At this time, the arc extinguishing groove 1017, the assembling groove 1012 and the wiring groove 10121 matched with the wiring assembly 13 are kept communicated. Therefore, a high-temperature gas of the arc extinguishing chamber 14 is discharged sequentially through the arc extinguishing groove 1017, the assembling groove 1012 and the wiring groove 10121, and less space in the shell 10 is occupied. Further, one end of the assembling groove 1012 opposite to the ventilation hole 10172 is enclosed by the arc isolation rib 10171 (see FIGS. 9 and 22). The arc isolation rib 10171 is used for preventing the high-temperature gas of the arc extinguishing chamber 14 from burning the moving contact portion 112 in an opening position.

[0036] A first embodiment of an isolation switch is provided in conjunction with FIGS. 1-16.

[0037] As shown in FIGS. 1-4, the isolation switch includes an operating module b and a contact module a that are laminated. The operating module b includes a module housing 20 and an operating mechanism 21 arranged in the module housing 20. A driving end of the operating mechanism 21 is in linkage connection with the contact module a. An operating end of the operating mechanism 21 extends out of the module housing 20 and is used for driving the operating mechanism 21 from the outside. The operating end is connected to a knob that is an operating member 22. The prior art is adopted in the driving connection between the operating mechanism 21 and the contact module a in the present embodiment.

[0038] As shown in FIGS. 1, 2 and 5-8, the contact module a includes four contact units 1 laminated in sequence. Each contact unit 1 includes a shell 10, and a contact system, two wiring assemblies 13 and two sets of arc extinguishing chambers 14 arranged in the shell 10. The contact system includes a moving contact assembly 11 and a pair of static contact assemblies, wherein the moving contact assembly 11 is rotatably assembled in the middle of the shell 10. The driving end drives the moving contact assembly 11 to rotate around its axis. The pair of static contact assemblies are respectively arranged on opposite two sides of the moving contact assembly 11. Preferably, each static contact assembly is connected to a set of wiring assemblies 13, and the wiring assemblies 13 are cooperatively wired with the static contact assemblies. Each set of static contact assemblies and the wiring assemblies 13 cooperate with the wiring groove 10121 that is formed in the side wall of the shell 10 for electrifying. Of course, the static contact assemblies may be directly wired to the outside. The two arc extinguishing chambers 14 are respectively arranged in a circumferential direction of the moving contact assembly 11 and form a rotationally symmetrical structure with respect to the moving contact assembly 11.

[0039] Specifically, the shell 10 as shown in FIGS. 5-9 includes a rectangular base. An assembling cavity for assembling the contact system, the wiring assembly 13 and the arc extinguishing chamber 14 is formed on one side of the base. Of course, the shell 10 may also include an upper cover covering the base, so that the shell 10 has an enclosed structure. The assembling cavity is formed by an internal space of the shell 10. Two opposite side walls of the base are each provided with one wiring groove 10121 into which a conductor is plugged. In FIGS. 6-9, the two wiring grooves 10121 are respectively located at positions of the base close to corners. A side wall adjacent to each wiring groove 10121 is provided with an operating hole 10122 into which a wiring screw 131 is screwed. A circular rotating groove 1011 is formed in the middle of the base. The moving contact assembly 11 is rotatably assembled in the rotating groove 1011. The assembling grooves 1012 are respectively formed in opposite two sides of the rotating groove 1011 respectively. A pair of static contact assemblies are respectively assembled in the two assembling grooves 1012. The wiring assemblies 13 connected to the static contact assemblies are also assembled in the assembling groove 1012 and opposite to the wiring groove 10121.

[0040] In FIG. 9, the assembling grooves 1012 are respectively located on two opposite sides of the base, and one end of each assembling groove 1012 is communicated with the adjacent wiring groove 10121 and the operating hole 10122 respectively, so that one end of the assembling groove 1012 is communicated with the outside of the shell 10, and the two wiring grooves 10121 form a rotationally symmetrical structure with respect to the rotating groove 1011. Each wiring groove 10121 is communicated with one end of the assembling groove 1012. A pair of arc extinguishing grooves 1017 are formed in a circumferential direction of the rotating groove 1011. Each arc extinguishing groove 1017 is adjacent to and communicated with one assembling groove 1012 respectively. That is, the ventilation hole 10172 is formed in one side wall shared by the arc extinguishing groove 1017 and the assembling groove 1012. In addition, in the two adjacent laminated bases, the wiring grooves 10121 (the operating holes 10122) located on the same side are staggered to avoid mutual influence between conductors connected to the adjacent contact modules a. In the present embodiment, the wiring grooves 10121 that are located on the same side of the adj acent bases are respectively located at both ends of the contact module a. That is, as shown in FIG. 2, a first layer to a fourth layer are sequentially arranged from bottom to top. The wiring grooves 10121 in the first and third layers are located at the left end of the contact module a, and the wiring grooves 10121 in the second layer and the fourth layer are located at the right end of the contact module a. Of course, as other inferior embodiments, the wiring grooves 10121 of the adjacent contact modules a may also be aligned.

[0041] In the present embodiment, as shown in FIGS. 5, 7, 8 and 10, the moving contact assembly 11 includes an arc isolation portion 110. The arc isolation portion 110 may be of an integrated structure or a split structure. The arc isolation portion 110 is rotatable fit with the shell 10 (base). A contact groove 1103 is formed in the arc isolation portion 110 in a radial direction. A mounting groove 1104 communicated with the contact groove 1103 is formed in an edge of the arc isolation portion 110. Preferably, the mounting groove 1104 is a through groove. At this moment, the mounting groove 1104 penetrates through the contact groove 1103 in an axis direction parallel to the arc isolation portion 110. The mounting groove 1104 is correspondingly reserved with a notch at two end surfaces of the arc isolation portion 110 respectively. The shape of the notch preferably matches the shape of the static contact portion 120 of the static contact assembly. When the contact assembly is assembled, the moving contact assembly 11 and a pair of static contact portions 120 can be avoided through the notch. The static contact portion 120 can be transferred from the mounting groove 1104 into the contact groove 1103 and cooperates with the moving contact portion 112, such that the assembling step is simplified.

[0042] As shown in FIG. 10, a pair of moving contact portions 112 are arranged in the contact groove 1103. Preferably, each moving contact portion 112 is located in the contact groove 1103 between the two mounting grooves 1104, and a pair of moving contact portions 112 form a rotationally symmetrical structure with respect to the axis of the arc isolation portion 110. The moving contact portion 112 avoids the position of the mounting groove 1104, so that the moving contact portion 112 and the static contact portion 120 are in contact fit in the contact groove 1103, thereby improving the operation safety. Further, a pair of moving contact portions 112 are formed at both ends of the moving contact bridge 111, which simplifies the structure and improves the rotational synchronization of the pair of moving contact portions 112. Preferably, a mounting cavity 1106 for assembling the moving contact bridge 111 is arranged in the middle of the arc isolation portion 110 in a radial direction. The mounting cavity 1106 radially penetrates through the arc isolation portion 110. Both ends of the mounting cavity 1106 are communicated with the contact groove 1103 respectively. At this moment, the moving contact portion 112 is located at a junction between the mounting cavity 1106 and the contact groove 1103, and the moving contact bridge 111 is limited inside, thereby improving the stability of the structure.

[0043] Preferably, the arc isolation portions 110 of the adjacent two contact units 1 are in pluggable fit with each other. A rotary supporting portion 1105 is arranged at an axial end of each arc isolation portion 110, at least two first positioning portions 11012 are arranged at one end of the rotary supporting portion 1105, and the first positioning portions 11012 are symmetrical with respect to an axis of the rotary supporting portion. In this way, every two first positioning portions 11012 are arranged in pairs, which can ensure uniform stress. At least two second positioning portions 11013 are arranged at the other end of the same arc isolation portion 110. The second positioning portions 11013 are in pluggable fit with the first positioning portions 11012 of the adjacent arc isolation portions 110 in a one-to-one correspondence manner. In this way, the first positioning portions 11012 and the second positioning portions 11013 are respectively located on both sides of the axis, such that the rotational synchronization and the positioning of the adj acent two moving contact assemblies 11 are improved. Under the condition of the same rotational torque, rotary driving force arms of the adjacent two layers of contact units 1 are lengthened, which is more conducive to synchronous rotation.

[0044] Combining FIGS. 5-8 and 10-15, a specific structure of a moving contact assembly 11 is provided. The moving contact assembly 11 includes an arc isolation portion 110 and a moving contact bridge 111 arranged in a radial direction of the arc isolation portion 110.

[0045] As shown in FIGS. 10-15, the arc isolation portion 110 includes a circular first arc isolation plate 1101 and a second arc isolation plate 1102. The first arc isolation plate 1101 and the second arc isolation plate 1102 are spaced oppositely. A gap as the contact groove 1103 is reserved between an edge of the first arc isolation plate 1101 and an edge of the second arc isolation plate 1102. A pair of first notch grooves 11011 are respectively formed in the edges on both sides of the first arc isolation plate 1101. A pair of second notch grooves 11021 are respectively formed in the edges on both sides of the second arc isolation plate 1102. Each first notch groove 11011 forms a mounting groove 1104 which corresponds to one second notch groove 11021. In FIGS. 10-13, the first notch groove 11011 and the second notch groove 11021 are both sector-shaped notches.

[0046] Preferably, the first arc isolation plate 1101 is in pluggable fit with the second arc isolation plate 1102, so that the first arc isolation plate 1101 and the second arc isolation plate 1102 are assembled as a whole. A circular boss is formed in the middle of a plate surface on one side of the first arc isolation plate 1101 in a protruding manner. The circular boss is rotatably assembled in the rotating groove 1011 of the base as the rotary supporting portion 1105. Two jacks as the first positioning portions 11012 are formed in an end surface of the rotary supporting portion 1105. The two first positioning portions 11012 form a rotationally symmetrical structure with respect to the axis of the first arc isolation plate 1101 respectively. Two convex shafts are arranged on one side of the first arc isolation plate 1101 away from the rotary supporting portion 1105 in a protruding manner. The two convex shafts are used as the second positioning portions 11013. A plate surface of each second arc isolation plate 1102 is provided with two through holes 11022, so that the two second positioning portions 11013 correspondingly penetrate through the through holes 11022 of the second arc isolation plates 1102 respectively and are in pluggable fit with the first positioning portions 11012 of the adjacent arc isolation portions 110, wherein the shape of the first positioning portion 11012 and the shape of the through hole 11022 match a cross-sectional shape of the second positioning portion 11013, and the number of the first positioning portions 11012, the number of the through holes 11022 and the number of the second positioning portions 11013 also match with each other.

[0047] In the present embodiment, the moving contact bridge 111 is assembled between the two second positioning portions 11013 in a limited manner, and the first arc isolation plates 1101 and the second arc isolation plates 1102 which are in pluggable fit with each other are conducive to clamping the moving contact bridge 111.

[0048] As shown in FIGS. 10-15, a mounting cavity 1106 for assembling the moving contact bridge 111 is formed between the first arc isolation plate 1101 and the second arc isolation 1102. A groove arranged in a radial direction is formed in a plate surface of the first arc isolation plate 1101 and/or the second arc isolation plate 1102. After the first arc isolation plate 1101 is in pluggable fit with the second arc isolation plate 1102, a radial groove correspondingly forms the mounting cavity 1106. The mounting cavity 1106 passes between the two second positioning portions 11013. The moving contact bridge 111 is mounted in the mounting cavity 1106 in a limited manner. Further, a foolproof structure may be arranged between a side wall of the mounting cavity 1106 and the moving contact bridge 111. The foolproof structure includes a foolproof protrusion 11061 (FIGS. 12 and 13) and a foolproof groove 1114 (FIG. 14) that cooperate with each other, so that the moving contact bridge 111 can be located and the moving contact bridge 111 can be prevented from being mounted in a staggering manner.

[0049] As shown in FIGS. 12 and 13, a plate surface of the first arc isolation plate 1101 between the two second positioning portions 11013 is provided with a radial groove. The foolproof protrusions 11061 are arranged on two side walls of the radial groove in a protruding manner. The foolproof protrusions 11061 in the present embodiment are rotationally symmetrical with respect to the axis of the first arc isolation plate 1101. Correspondingly, a radial groove is also arranged between the two through holes 11022 of the second arc isolation plate 1102. When the two second positioning portions 11013 are in pluggable fit with the two through holes 11022, the radial grooves of the first arc isolation plate 1101 and the second arc isolation plate 1102 are docked to form the mounting cavity 1106 for assembling the moving contact bridge 111. Preferably, a side wall of the radial groove of the second arc isolation plate 1102 is also provided with a foolproof protrusion 11061 in a protruding manner, but the foolproof protrusion 11061 located on the second arc isolation plate 1102 does not completely correspond to the foolproof protrusion 11061 located on the first arc isolation plate 1101, so that the moving contact bridge 111 is limited from all directions and clamped in the mounting cavity 1106. Of course, the moving contact bridge 111 may also be limited in the mounting cavity 1106 in other ways.

[0050] Further, a clamping structure is further arranged between the first arc isolation plate 1101 and the second arc isolation plate 1102. The clamping structure includes a buckle 11071 and a clamping groove 11072 that match each other. The clamping structure can further improve the plugging stability of the first arc isolation plate 1101 and the second arc isolation plate 1102, which is also conducive to the first arc isolation plate 1101 and the second arc isolation plate 1102 to clamp the moving contact bridge 111. As shown in FIGS. 10, 12 and 13, two clamping grooves 11072 are formed in both sides outside the radial groove of the first arc isolation plate 1101. Correspondingly, two buckles 11071 are arranged on both sides outside the radial groove of the second arc isolation plate 1102, and preferably, the two buckles 11071 (two clamping grooves 11072) are preferably formed with respect to the axis of the arc isolation portion 110 to form a rotationally symmetrical structure. Of course, the first arc isolation plate 1101 and the second arc isolation plate 1102 may also be fixedly connected through screws.

[0051] As another embodiment, when the arc isolation portion 110 is of an integral structure, the contact groove 1103 is a circumferential side wall surrounding the arc isolation portion 110, the mounting cavity 1106 penetrates through the arc isolation portion 110 in a radial direction and is communicated with the contact groove 1103. The first positioning portion 11012 and the second positioning portion 11013 are correspondingly arranged at two axial ends of the arc isolation portion 110. At this moment, the arc isolation portion 110 does not have a through hole 11022 and a clamping structure, and a foolproof structure may not be arranged between the moving contact bridge 111 and the mounting cavity 1106.

[0052] As shown in FIGS. 14 and 15, the moving contact bridge 111 includes two first conductive plates 1111. Both ends of each first conductive plate 1111 are respectively bent outward to form a first conductive sheet 1121. The first conductive sheet 1121 and the first conductive plate 1111 are basically parallel and located in different planes. The two first conductive sheets 1121 at the same end of the two first conductive plates 1111 are spaced oppositely to form the moving contact portions 112 that can clamp the static contact portion 120. The two first conductive sheets 1121 have elasticity to clamp the static contact portion 120 of the static contact assembly. The middle parts of the two first conductive plates 1111 are connected, and a foolproof groove 1114 matched with the foolproof protrusion 11061 is formed in a side edge of each first conductive plate 1111. In FIGS. 12 and 13, a protruding portion of the foolproof protrusion 11061 is arc-shaped. Correspondingly, the foolproof groove 1114 is an arc-shaped groove. In the present embodiment, the end surfaces of the first conductive sheet 1121 and the arc isolation portion 110 are nearly parallel, that is, nearly parallel to the first arc isolation plate 1101 and the second arc isolation plate 1102. Preferably, a plug-in structure is arranged between the two first conductive plates 1111. The plug-in structure includes a mounting boss 1112 and a mounting groove 1113 that match each other. In this way, the two first conductive plates 1111 can be quickly and easily connected as a whole. In FIGS. 14 and 15, a mounting boss 1112 and a mounting groove 1113 are arranged in the middle of each first conductive plate 1111 respectively.

[0053] In the present embodiment, the static contact assembly includes a conductive plate arranged in the assembling groove 1012. One end of the conductive plate is matched with the wiring groove 10121 arranged on the side wall of the shell 10 for wiring. An edge of the plate surface of the conductive plate away from the wiring groove 10121 protrudes outward to form the static contact portion 120. The static contact portion 120 is located in the same plane as the conductive plate. The static contact portion 120 is of an overall plate-shaped structure, and the static contact portion 120 is parallel to the first conductive sheet 1121, and may be plugged as the elastic contact (i.e., elastic clamping) between the two first conductive sheets 1121 of the moving contact portion 112. In addition, in the present embodiment, the static contact portion 120 is V-shaped as a whole, occupies a small space, is convenient to cooperate with the mounting groove 1104 and is conducive to contact fit with the moving contact portion 112.

[0054] Specifically, as shown in FIGS. 5-8 and 16, the conductive plate in the present embodiment is a V-shaped second conductive plate 121. The middle part of the second conductive plate 121 is used as the static contact portion 120. Both ends of the second conductive plate 121 are bent and extend respectively to form a pair of wiring plates 1211 which are spaced oppositely. Preferably, the plate surface of each wiring plate 1211 is preferably perpendicular to the plate surface of the second conductive plate 121, and a wiring hole 1212 is formed in the middle of each wiring plate 1211. The static contact assembly is mounted in the assembling groove 1012. The V-shaped static contact portion 120 corresponds to a sector-shaped notch of the arc isolation portion 11. The wiring plate 1211 is adjacent to the wiring groove 10121. The wiring hole 1212 is coaxial with the operating hole 10122.

[0055] In the present embodiment, as shown in FIGS. 5-8, each static contact assembly is connected to a set of wiring assemblies 13. The wiring assembly 13 includes a wiring screw 131. The wiring screw 131 is assembled with a crimping plate 132. The crimping plate 132 is parallel and opposite to the wiring plate 1211. The wiring hole 1212, the wiring screw 131 and the operating hole 10122 are coaxial, so that the wiring screw 131 can be operated conveniently to move in the assembling groove 1012, and a central axis of the wiring groove 10121 is perpendicular to a central axis of the wiring hole 1212. Obviously, the wiring assembly 13 may also adopt other wiring structures, such as a structure with a wiring base and a wiring screw, or a plug-in wiring structure with a wire clamp, etc.

[0056] An arc extinguishing chamber 14 is assembled in each arc extinguishing groove 1017, so that a pair of arc extinguishing chambers 14 are arranged in a circumferential direction of the moving contact assembly 11 and the arc extinguishing chamber 14 is located between the static contact portion 120 and the moving contact portion 112 in the opening position. The two arc extinguishing chambers 14 form a rotationally symmetrical structure with respect to the moving contact assembly 11. An arc generated by the breaking of the contact system is extinguished by the arc extinguishing chamber 14. A high-temperature gas of the arc extinguishing chamber 14 flows through the assembling groove 1012 through the ventilation hole 10172 and is then discharged from the wiring groove 10121. In the present embodiment, the high-temperature gas may also be discharged from the operating hole 10122. Further, as shown in FIG. 9, in the present embodiment, one end of the arc extinguishing groove 1017 opposite to the ventilation hole 10172 is enclosed by an arc isolation rib 10171, so that the arc isolation rib 10171 is used to prevent the high-temperature gas of the arc extinguishing chamber 14 from burning the moving contact assembly 11 in the opening position.

[0057] In conjunction with FIGS. 10-15 and 17-23, a second embodiment of an isolation switch is provided. The isolation switch includes an operating module b and a contact module a which are laminated. The operating module b is identical to that in the first embodiment. The contact module a is similar to that in the first embodiment, and also includes four contact units 1 which are laminated. Each contact unit 1 includes a shell 10, a contact system arranged in the shell 10 and two sets of arc extinguishing chambers 14. The contact system includes a moving contact assembly 11 which is rotatably assembled and a pair of static contact assemblies. The moving contact assembly 11 is rotatably assembled in the middle of the shell 10. The pair of static contact assemblies are respectively arranged on opposite two sides of the moving contact assembly 11. Each static contact assembly is wired cooperatively with the wiring groove 10121 formed in a side wall of the shell 10. The two arc extinguishing chambers 14 are respectively arranged in a circumferential direction of the moving contact assembly 11 and form a rotationally symmetrical structure with respect to the moving contact assembly 11.

[0058] The shell 10 includes a rectangular base. As shown in FIGS. 17-22 specifically, an assembling cavity for assembling the contact system and the arc extinguishing chamber 14 is formed on one side of the base. A circular rotating groove 1011 is formed in the middle of the base and used for installing the moving contact assembly 11. An assembling groove 1012 is respectively formed in opposite two sides of the rotating groove 1011 respectively and used for mounting a static contact assembly. A side wall of one base connected between the pair of assembling grooves 1012 is provided with a pair of wiring grooves 10121. One end of each assembling groove 1012 is communicated with the wiring groove 10121. In FIGS. 22, the assembling groove 1012 and the wiring groove 10121 are formed in a side edge of the base. That is, a pair of assembling grooves 1012 are respectively arranged in the edges of upper and lower sides of the base, respectively. A pair of wiring grooves 10121 are respectively located in upper and lower ends of a right side wall of the base respectively and are communicated with one wiring groove 10121 respectively. All wiring grooves 10121 are located on the same side of the contact module a. A pair of arc extinguishing grooves 1017 for installing the arc extinguishing chamber 14 are arranged in a circumferential direction of the rotating groove 1011, and the two arc extinguishing grooves 1017 form a rotationally symmetrical structure with respect to the rotating groove 1011. One of the arc extinguishing grooves 1017 and the two assembling grooves 1012 are located on the same side of the rotating grooves 1011 and are adjacent to and communicated with one assembling groove 1012. That is, the arc extinguishing groove 1017 and the assembling groove 1012 share one side wall which is provided with a ventilation hole 10172. The other arc extinguishing groove 1017 is also communicated with the assembling groove 1012 by forming the ventilation hole 10172 in the side wall. That is, in FIG. 22, the arc extinguishing groove 1017 located on the right side is adjacent to and communicated with the assembling groove 1012 on the lower side. The arc extinguishing groove 1017 on the left side is communicated with the assembling groove 1012 on the upper side. The ventilation hole 1017 located on the left side is communicated with the assembling groove 1012 on the upper side. The ventilation hole is located in a left edge of the arc extinguishing groove 1017 on the left side. The left arc extinguishing groove 1017 and the upper assembling groove 1012 are farther from each other, but still kept communicated, and preferably, a communicating groove may be formed therebetween.

[0059] As shown in FIGS. 17-22, packaging structures which are matched mutually are arranged between the adjacent two bases, which is conducive to ensuring the airtightness of the contact module. The packaging structure includes a packaging wall 1014 and a packaging groove 1015 that are in pluggable fit with each other. The packaging wall 1014 is formed by protruding outside and extending from a part of the edge of the outer side wall of the base in parallel. Preferably, the packaging wall 1014 is arranged around the outer side wall of each base, wherein part of the edge of the packaging wall 1014 further protrudes outward to form a guard plate 10141. The packaging groove 1015 is formed by recessing from part of the edge of the outer side wall of the base. Preferably, the packaging groove 1015 is also arranged around the edge of the outer side wall of the base, and a matching groove 10151 matched with the guard plate 10141 is formed in the packaging groove 1015. In the drawings, the guard plate 10141 and the matching groove 10151 are respectively located on the outer side wall of the base corresponding to the assembling groove 1012, which is conducive to ensuring the plugging stability of the packaging structure. In the present embodiment, an upper edge of a side wall of the bottommost base is provided only with a packaging wall 1014, the remaining bases are respectively provided with a packaging wall 1014 and a packaging groove 1015. The packaging wall 1014 is located at an upper edge of the outer side wall of each base. The packaging groove 1015 is located at the lower edge of the outer side wall of each base. Correspondingly, the lower edge of the outer side wall of the module housing 20 adjacent to the topmost base is also correspondingly provided with a packaging groove 1015 and a matching groove 10151.

[0060] As shown in FIG. 18, at least one pair of pressing bosses 1018 are arranged on one side of the base away from the assembling cavity in a protruding manner. The pressing bosses 1018 are opposite to the assembling grooves 1012 of the adjacent bases respectively, and are used for pressing the static contact assembly arranged in the assembling groove 1012. As shown in FIGS. 20-22, a pair of positioning plates 10161 are further arranged on the outer side wall of the base. The pair of positioning plates 10161 are located between the pair of wiring grooves 10121 on the same base. A spacing between the pair of positioning plates 10161 forms a fixed sub-groove 10162. The fixed sub-grooves 10162 of the adjacent two bases are correspondingly communicated to form a fixed groove. Further, a fixed boss 10163 is arranged in at least one of the fixed sub-grooves 10162 in a protruding manner, so that the fixed boss 10163 is arranged in the fixed groove, and the fixed boss 10163 can be used for positioning a circuit board, so that the circuit board can be assembled conveniently.

[0061] A moving contact assembly 11 identical to that in the first embodiment is arranged in the base. Similarly, the static contact assembly in the present embodiment also has a V-shaped static contact portion 120. Unlike the first embodiment, the static contact assembly in the present embodiment includes an I-shaped third conductive plate 122. As shown in FIGS. 18-22 and 23, the middle part of the third conductive plate 122 is bent, so that both ends of the third conductive plate 122 are respectively located in two parallel planes. One end of the third conductive plate 122 extends out of the shell 10 from the wiring groove 10121 as a pin end 1221, and the other end of the third conductive plate 122 extends outward to form a V-shaped static contact portion 120. In the present embodiment, the wiring assembly 13 is no longer arranged, and the pin end 1221 of the third conductive plate 122 is wired. The pin end 1221 may be welded and electrically connected to an external circuit board or in pluggable fit with an external electrical appliance.

[0062] An arc extinguishing chamber 14 is assembled in each arc extinguishing groove 1017, so that a pair of arc extinguishing chambers 14 are arranged in a circumferential direction of the moving contact assembly 11 and the arc extinguishing chamber 14 is located between the static contact portion 120 and the dynamic contact portion 112 in an opening position. The two arc extinguishing chambers 14 form a rotationally symmetrical structure with respect to the moving contact assembly 11. An arc generated by the breaking of the contact system is extinguished by the arc extinguishing chamber 14. A high-temperature gas of the arc extinguishing chamber 14 flows through the assembling groove 1012 through the ventilation hole 10172 and is discharged from the wiring groove 10121. Further, as shown in FIG. 22, in the present embodiment, one end of the arc extinguishing groove 1017 opposite to the ventilation hole 10172 is also enclosed by an arc isolation rib 10171, so that the arc extinguishing rib 10171 is used to prevent the high-temperature gas of the arc extinguishing chamber 14 from burning the moving contact assembly 11 in the opening position.

[0063] It should be explained that, in the description of the present invention, the terms such as "up", "down", "left", "right", "inner" and "outer" indicating the directional or positional relations on the basis of the directional or positional relations shown in the drawings are only used for conveniently describing the present invention and simplifying the description, not indicate or imply that the referred devices or elements must have a specific orientation and be configured and operated in a specific direction; therefore, they cannot be construed as a limitation on the present invention.

[0064] We have made further detailed description of the present invention mentioned above in combination with specific preferred embodiments, but it is not deemed that the specific embodiments of the present invention is only limited to these descriptions. A person skilled in the art can also, without departing from the concept of the present invention, make several simple deductions or substitutions, which all be deemed to fall within the protection scope of the present invention.

Claims

1. A contact system, comprising a moving contact assembly (11) arranged in a shell (10) and a pair of static contact assemblies, the moving contact assembly (11) comprises an arc isolation portion (110) which is assembled rotatably; the arc isolation portion (110) is provided with a contact groove (1103) inside; a pair of moving contact portions (112) are arranged in the contact groove (1103); each static contact assembly comprises a static contact portion (120) which extends into the contact groove (1103); the arc isolation portion (110) rotates and drives the pair of moving contact portions (112) to be in contact with or separated from the static moving portion (120) in the contact groove (1103); wherein an edge of the arc isolation portion (110) is further provided with a pair of mounting grooves (1104) which are communicated with the contact groove (1103); and each mounting groove (1104) is reserved with a notch for the static contact portion (120) to be placed at least at one end surface of the arc isolation portion (110).

2. The contact system according to claim 1, wherein each moving contact portion (112) is located in the contact groove (1103) between the two mounting grooves (1104), and the pair of moving contact portions (112) form a rotationally symmetrical structure with respect to an axis of the arc isolation portion (110).

3. The contact system according to claim 1, wherein each mounting groove (1104) reserves the notch on two end surfaces of the arc isolation portion (110) respectively, so that the mounting groove (1104) penetrates through the contact groove (1103) in an axis direction parallel to the arc isolation portion (110).

4. The contact system according to claim 1, wherein a mounting cavity (1106) which is formed in a radial direction of the arc isolation portion (110) is formed in the arc isolation portion (110); both ends of the mounting cavity (1106) are respectively communicated with the contact groove (1103); a moving contact bridge (111) is assembled in the mounting cavity (1106); and both ends of the moving contact bridge (111) are respectively located at a junction between the mounting cavity (1106) and the contact groove (1103) as the moving contact portion (112).

5. The contact system according to claim 1, wherein at least two first positioning portions (11012) are arranged at one end of the arc isolation portion (110), and the first positioning portions (11012) are symmetrical with respect to an axis of the arc isolation portion (110); at least two second positioning portions (11013) are arranged at the other end of the arc isolation portion (110); and the second positioning portions (11013) are connected to the first positioning portions (11012) of the arc isolation portions (110) in the adjacent moving contact assemblies (11).

6. The contact system according to claim 1 or 5, wherein the arc isolation portion (110) comprises a first arc isolation plate (1101) and a second arc isolation plate (1102) which are spaced oppositely; a gap as the contact groove (1103) is formed between an edge of the first arc isolation plate (1101) and an edge of the second arc isolation plate (1102); a pair of first notch grooves (11011) are respectively formed in the edges on both sides of the first arc isolation plate (1101); a pair of second notch grooves (11021) are respectively formed in the edges on both sides of the second arc isolation plate (1102); and the first notch grooves (11011) and the second notch grooves (11021) are in one-to-one correspondence to form the mounting grooves (1104).

7. The contact system according to claim 6, wherein the first arc isolation plate (1101) is in pluggable fit with the second arc isolation plate (1102); a moving contact bridge (111) is assembled between the first arc isolation plate (1101) and the second arc isolation plate (1102) in a limiting manner; the moving contact bridge (111) is arranged in a radial direction of the arc isolation portion (110); and both ends of the moving contact bridge (111) extend into the contact groove (1103) as the moving contact portions (112) respectively.

8. The contact system according to claim 7, wherein the moving contact bridge (111) comprises two first conductive plates (1111); a first conductive sheet (1121) is respectively formed at both ends of each first conductive plate (1111), respectively; the middle parts of the two first conductive plates (1111) are connected; and the two first conductive sheets (1121) located at the same end of the two first conductive plates (1111) are spaced oppositely to form moving contact portions (112) that can clamp the static contact portion (120).

9. The contact system according to claim 1, wherein the static contact assembly comprises a second conductive plate (121); the second conductive plate (121) is V-shaped as a whole; both end parts of the second conductive plate (121) are bent and extend respectively to form a pair of wiring plates (1211) which are spaced oppositely; and a protruding region in the middle of the second conductive plate (121) is used as the static contact portion (120); or
the static contact assembly comprises a third conductive plate (122); the middle part of the third conductive plate (122) is bent, so that both ends of the third conductive plate (122) are respectively located in two parallel planes; one end of the third conductive plate (122) is used as a pin end (1221); and a side of the other end of the third conductive plate (122) extends outward to form a V-shaped static contact portion (120).

10. A contact unit, comprising a shell (10), wherein the contact system according to claim 1 is arranged in the shell (10); a pair of arc extinguishing grooves (1017) for assembling an arc extinguishing chamber (14) are formed in the shell (10); a pair of assembling grooves (1012) for assembling static contact assemblies are also formed in the shell (10); and the arc extinguishing grooves (1017) are communicated with the assembling grooves (1012) in a one-to-one correspondence manner.

11. The contact unit according to claim 10, wherein one end of the assembling groove (1012) is communicated with the wiring groove (10121) formed in the side wall of the shell (10); the arc extinguishing groove (1017) is provided with a ventilation hole (10172) for communicating with the assembling groove (1012); one end of the assembling groove (1012) opposite to the ventilation hole (10172) is enclosed by an arc isolation rib (10171); and the arc isolation rib (10171) is used for preventing a high-temperature gas of the arc extinguishing chamber (14) from burning the moving contact portion (112) in an opening position.

12. The contact unit according to claim 10, wherein the shell (10) comprises a base; an assembling cavity for assembling the contact system and the arc extinguishing chamber (14) is formed on one side of the base; packaging structures which are matched with each other are arranged between the adjacent bases which are laminated; each packaging structure comprises a packaging wall (1014) and a packaging groove (1015) that are in pluggable fit with each other; the packaging wall (1014) is formed by protruding outward and extending in parallel from part of the edge of the outer side wall of the base; and the packaging groove (1015) is formed by recessing from part of the edge of the outer side wall of the base.

13. The contact unit according to claim 12, wherein the outer side wall surrounding each base is provided with a packaging wall (1014) and/or a packaging groove (1015); a guard plate (10141) is arranged on part of the edge of the packaging wall (1014) in a protruding manner; a matching groove (10151) matched with the guard plate (10141) is formed in the packaging groove (1015); and the guard plate (10141) and the matching groove (10151) are located on the outer side wall of the base corresponding to the static contact assembly.

14. The contact unit according to claim 13, wherein at least one pair of pressing bosses (1018) are arranged on the base away from the assembling cavity in a protruding manner, and the pressing bosses (1018) are used for pressing the static contact assemblies in the assembly cavities of the adjacent bases.

15. An isolation switch, comprising an operating module (b) and a contact module (a) driven by an operating module (b), wherein the contact module (a) comprises at least one layer of contact units (1) according to any one of claims 10 to 14.

Drawing