CN220381936U - Static contact assembly, contact unit and isolating switch - Google Patents

Abstract

The static contact assembly comprises a second conductive plate, wherein the second conductive plate is connected with a pair of wiring boards with opposite intervals, and the middle edge of the second conductive plate is parallel to the second conductive plate and protrudes outwards to form a static contact part. The contact unit comprises a shell and a movable contact assembly rotatably assembled in the shell, wherein a fixed contact assembly is assembled in the shell, and a fixed contact part of each fixed contact assembly is contacted with or separated from a movable contact part of the movable contact assembly. In the utility model, the static contact part of the static contact assembly is formed by the second conductive plate protruding outwards in parallel, compared with the traditional static contact assembly, the second conductive plate and the static contact part are positioned on the same plane, and the contact part does not need to be independently bent and arranged, so that the static contact assembly has the advantages of simple structure, low production cost and small occupied space.

Description

Static contact assembly, contact unit and isolating switch

Technical Field

The utility model relates to the field of piezoelectric devices, in particular to a static contact assembly, a contact unit and an isolating switch.

Background

With the rapid development of the ac/dc electrical appliance industry, rotary isolating switches have been widely used. In the existing rotary isolating switch, the contact module comprises a plurality of contact units which are arranged in a stacked manner, each contact unit is internally provided with a wiring board and a contact part, the wiring board is used for external wiring, the contact parts are used for being matched with the movable contact assembly, the wiring boards and the contact parts which are respectively positioned on different planes are connected together by virtue of conductive plates, and the static contact assembly formed in the way generally occupies more space and is unfavorable for reducing cost.

Disclosure of Invention

The utility model aims to overcome at least one defect of the prior art and provides a static contact assembly and a disconnecting switch which are simple in structure and high in reliability.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the static contact assembly comprises a second conductive plate, wherein the second conductive plate is connected with a pair of wiring boards with opposite intervals, and the middle edge of the second conductive plate is parallel to the second conductive plate and protrudes outwards to form a static contact part.

Further, the pair of wiring boards are respectively connected to two ends of the second conductive board, the board surface of each wiring board is perpendicular to the board surface of the second conductive board, a wiring hole is formed in the middle of each wiring board, and the central axis of each wiring hole is parallel to the board surface of the second conductive board.

Further, the second conductive plate is in a V shape as a whole, two end parts of the second conductive plate are respectively bent and extended to form a pair of wiring boards with opposite intervals, and a convex area in the middle of the second conductive plate is used as a static contact part.

Further, the second conducting plate of V font includes two second conducting strips that are located the coplanar, and the one end of two second conducting strips is connected and is constituted quiet contact portion, and the other end of two second conducting strips is connected with two wiring boards bending type respectively, makes two second conducting strips after the connection form the V-arrangement groove between two wiring boards.

The utility model also provides a contact unit which comprises a shell and a movable contact assembly rotatably assembled in the shell, wherein a pair of fixed contact assemblies are assembled in the shell, and the fixed contact part of each fixed contact assembly is contacted with or separated from the movable contact part of the movable contact assembly.

Preferably, the contact unit further comprises a wiring assembly connected with the fixed contact assembly, the wiring assembly comprises wiring screws, the wiring screws are provided with wire pressing plates parallel to the wiring plates, and the wiring screws are correspondingly assembled in wiring holes of one wiring plate.

Preferably, the movable contact assembly further comprises at least one arc extinguishing chamber, wherein the arc extinguishing chamber is arranged along the circumferential direction of the movable contact assembly and is positioned between the static contact part and the movable contact part when the movable contact assembly is in the opening position.

Preferably, the pair of fixed contact assemblies are respectively positioned at two opposite sides of the moving contact assembly, two arc-extinguishing chambers are arranged in the shell, and the two arc-extinguishing chambers form a rotationally symmetrical structure relative to the moving contact assembly.

Preferably, a pair of arc extinguishing grooves for assembling the arc extinguishing chambers are arranged in the shell, a pair of assembling grooves for assembling the static contact assemblies are also arranged in the shell, and the arc extinguishing grooves are communicated with the assembling grooves in a one-to-one correspondence manner; one end of the assembly groove is communicated with a wiring groove arranged on the side wall of the shell, the arc extinguishing groove is provided with a vent hole communicated with the assembly groove, and one end of the assembly groove opposite to the vent hole is sealed by an arc isolation rib.

The utility model also provides an isolating switch comprising an operating module and a contact module driven by the operating module, the contact module comprising at least one layer of contact units as described above.

The static contact assembly, the contact unit and the isolating switch have the advantages that the static contact part of the static contact assembly is formed by the second conductive plate protruding outwards in parallel, compared with the traditional static contact assembly, the second conductive plate and the static contact part are positioned on the same plane, the contact part does not need to be independently bent, and the static contact assembly has the advantages of simple structure, low production cost and small occupied space.

In addition, a pair of wiring boards are connected at the two ends of the conducting plate, and the face of each wiring board is perpendicular to the face of the conducting plate, so that the static contact assembly is supported and assembled in the shell, and particularly the conducting plate is directly in a V shape, so that materials are further saved, and the cost is reduced.

Drawings

FIG. 1 is a schematic view of a static contact assembly according to the present utility model

FIG. 2 is a schematic diagram of the structure of the isolating switch in the present utility model;

FIG. 3 is a schematic view of the structure of the wiring slot and the operation hole of the isolating switch in the utility model;

FIG. 4 is a schematic diagram of the operation module in the present utility model;

FIG. 5 is a schematic view showing the internal structure of the contact unit in the present utility model;

FIG. 6 is a schematic view of the structure of two contact units in the present utility model;

FIG. 7 is a schematic view of the structure of the base of the present utility model;

FIG. 8 is a schematic view of a moving contact assembly according to the present utility model;

reference numerals:

the device comprises a-contact modules, 1-contact units, 10-housings, 1011-rotating grooves, 1012-assembling grooves, 10121-wiring grooves, 10122-operation holes, 1013-pin grooves, 1017-arc extinguishing grooves, 10171-arc isolating ribs, 10172-vent holes, 11-moving contact assemblies, 110-arc isolating parts, 1101-first arc isolating plates, 11011-first notch grooves, 11013-second positioning parts, 1102-second arc isolating plates, 11021-second notch grooves, 11022-through holes, 1103-contact grooves, 1104-mounting grooves, 1105-rotating supporting parts, 1106-mounting cavities, 11071-buckles, 11072-clamping grooves, 111-moving contact bridges, 112-moving contact parts, 120-static contact parts, 121-second conductive plates, 1211-wiring plates, 1212-wiring holes, 1213-second conductive plates, 13-wiring assemblies, 14-arc extinguishing chambers, b-operation modules, 20-module housings, 21-operation mechanisms and 22-operation members.

Detailed Description

Specific embodiments of the contact system, contact unit and disconnector according to the utility model are further described below with reference to the examples given in the accompanying drawings. The contact system, the contact unit and the disconnector of the utility model are not limited to the description of the embodiments below.

As shown in fig. 2 to 4, the isolating switch comprises an operation module b and a contact module a driven by the operation module b, wherein the operation module b is stacked with the contact module a, one end of an operation mechanism 21 is used as a driving end to be in driving connection with the contact module a, and the other end of the operation mechanism 21 is used as an operation end to extend out of the module shell 20 for driving from outside; the contact module a comprises at least one layer of contact units 1, each contact unit 1 comprises a shell 10, a contact system and a wiring assembly 13 which are mutually connected are assembled in the shell 10, the switching-on/off of the contact system is driven by a driving end, the wiring assembly 13 is matched with a wiring groove 10121 formed in the side wall of the shell 10 for external wiring, when the contact module a comprises two or more contact units 1, two adjacent contact units 1 are arranged in a stacked mode, the driving end can penetrate through the contact module a to be in linkage connection with each contact system, and can also be connected with the contact systems of the adjacent contact units 1, and the contact systems of the other contact units 1 are in linkage connection with each other, so that synchronous switching-on/off is realized.

Specifically, as shown in fig. 5, 6 and 8, the contact system includes a moving contact assembly 11 assembled by rotation and a pair of fixed contact assemblies matched with the moving contact assembly 11, the moving contact assembly 11 includes an arc isolation part 110 and a moving contact bridge 111 which are assembled by rotation with the housing 10, the pair of fixed contact assemblies are respectively arranged at two sides of the moving contact assembly 11 (the arc isolation part 110) and are respectively connected with a wiring assembly 13, a contact groove 1103 is arranged in the arc isolation part 110, a pair of moving contact parts 112 are arranged in the contact groove 1103, each fixed contact assembly includes a fixed contact part 120 extending into the contact groove 1103, and the arc isolation part 110 rotates to drive the pair of moving contact parts 112 to be contacted with or separated from the fixed contact part 120 of the fixed contact part 120 in the contact groove 1103. The arc isolation part 110 rotates to drive the pair of movable contact parts 112 to contact with or separate from the static contact part 120 of the static contact part 120 in the contact groove 1103.

As shown in fig. 8, in this embodiment, the arc isolating part 110 includes a first arc isolating plate 1101 and a second arc isolating plate 1102 which are oppositely disposed at intervals, a gap serving as a contact groove 1103 is provided between the edge of the first arc isolating plate 1101 and the edge of the second arc isolating plate 1102, the movable contact bridge 111 is fixed between the first arc isolating plate 1101 and the second arc isolating plate 1102 and rotates along with the arc isolating part 110, a pair of movable contact parts 112 at two ends of the movable contact bridge 111 extend into the contact groove 1103, wherein the movable contact parts 112 include two first conductive plates which are disposed at intervals, the fixed contact parts 120 and the first conductive plates are approximately parallel to the end surfaces of the arc isolating part 110 (i.e. the surfaces parallel to the radial cross section of the arc isolating part 110), and the driving end of the operation module b drives the movable contact assembly 11 to rotate in the housing 10, so that the movable contact parts 112 are respectively contacted with or separated from the fixed contact parts 120 of the pair of fixed contact assemblies, that is, when the movable contact parts 112 are contacted with the fixed contact parts 120, the movable contact parts 120 are inserted into the two first conductive plates, and when the fixed contact parts 120 are contacted with the fixed contact parts, the first conductive plates are clamped again, and the first conductive plates are separated from each other. The improvement point of this application lies in that the stationary contact subassembly includes second current-conducting plate 121, and second current-conducting plate 121 is connected with a pair of opposite wiring board 1211 of interval, is parallel to second current-conducting plate 121 by second current-conducting plate 121's middle part edge and outwards protrudes and extend and form stationary contact 120, and contact 120 is parallel to outwards protrudes by second current-conducting plate 121 and forms, compares current stationary contact subassembly, need not to set up separately and buckles contact 120, has simple structure, low in production cost and occupation space is less advantage.

Preferably, a wire hole 1212 is formed in the middle of each wire board 1211, the central axis of each wire hole 1212 is parallel to the board surface of the second conductive board 121, a pair of wire boards 1211 are connected to two ends of the second conductive board 121, and the board surface of each wire board 1211 is perpendicular to the board surface of the second conductive board 121, so that the static contact assembly is supported and assembled in the housing 10.

A specific embodiment of a first type of disconnector is provided in connection with fig. 1-8.

As shown in fig. 2-4, the isolating switch includes an operation module b and a contact module a that are stacked, where the operation module b includes a module housing 20 and an operation mechanism 21 disposed in the module housing 20, a driving end of the operation mechanism 21 is connected with the contact module a in a linkage manner, an operation end of the operation mechanism 21 extends out of the module housing 20 to drive the operation mechanism 21 from outside, and the operation end is connected with a knob as an operation member 22, and the driving connection between the operation mechanism 21 and the contact module a in this embodiment adopts the prior art.

As shown in fig. 2-7, the contact module a includes four contact units 1 stacked in sequence, each contact unit 1 includes a housing 10, a contact system disposed in the housing 10, two wiring assemblies 13, and two groups of arc-extinguishing chambers 14, the contact system includes a moving contact assembly 11 and a pair of static contact assemblies, wherein the moving contact assembly 11 is rotationally assembled in the middle of the housing 10, the moving contact assembly 11 is driven by the driving end to rotate around its axis, the pair of static contact assemblies are respectively disposed on opposite sides of the moving contact assembly 11, each static contact assembly is connected with a group of wiring assemblies 13, the wiring assemblies 13 are connected with the static contact assemblies in a matching manner, each group of wiring assemblies 13 is connected with a wiring slot 10121 formed in the side wall of the housing 10 in a matching manner, and the two arc-extinguishing chambers 14 are disposed along the circumferential direction of the moving contact assembly 11 and form a rotationally symmetrical structure with respect to the moving contact assembly 11.

The housing 10, as shown in fig. 5-7, comprises a rectangular base, one side of the base forms an assembling cavity for assembling the contact system, the wiring assembly 13 and the arc extinguishing chamber 14, and of course, the housing 10 may also comprise an upper cover covering the base, so that the housing 10 is of a closed structure, and the inner space of the housing 10 forms the assembling cavity; two opposite side walls of the base are provided with a wiring groove 10121 for inserting conductors, in fig. 3 and 5-7, the two wiring grooves 10121 are respectively located at positions, close to corners, of the base, adjacent side walls of the wiring grooves 10121 are provided with operation holes 10122 for screwing wiring screws, the middle of the base is provided with a circular rotating groove 1011, the moving contact assembly 11 is rotationally assembled in the rotating groove 1011, two opposite sides of the rotating groove 1011 are respectively provided with an assembling groove 1012, a pair of fixed contact assemblies are respectively assembled in the two assembling grooves 1012, and the wiring assembly 13 connected with the fixed contact assemblies is also assembled in the assembling groove 1012 and is opposite to the wiring groove 10121.

In fig. 7, the fitting grooves 1012 are respectively located at two side positions opposite to the base, and one end of each fitting groove 1012 is respectively communicated with the adjacent wiring groove 10121 and the operation hole 10122, so that one end of the fitting groove 1012 is communicated with the outside of the housing 10, and the two wiring grooves 10121 form a rotationally symmetrical structure with respect to the rotation groove 1011, and each wiring groove 10121 is communicated with one end of the fitting groove 1012; a pair of arc-extinguishing grooves 1017 are provided along the circumferential direction of the rotating groove 1011, and each arc-extinguishing groove 1017 is adjacent to and communicates with one fitting groove 1012, respectively, that is, a vent hole 10172 is opened at a side wall common to the arc-extinguishing grooves 1017 and the fitting groove 1012. In addition, in two adjacent bases stacked, the wiring grooves 10121 (operation holes 10122) on the same side are arranged in a staggered manner to avoid mutual influence between conductors connected by adjacent contact modules a, in this embodiment, the wiring grooves 10121 on the same side of the adjacent bases are respectively located at two ends of the contact modules a, that is, as shown in fig. 3, the first layer to the fourth layer are sequentially located from bottom to top, the wiring grooves 10121 on the first layer and the third layer are located at the left end of the contact module a, and the wiring grooves 10121 on the second layer and the fourth layer are located at the right end of the contact module a; as shown in fig. 5 to 7, the movable contact assembly 11 is rotatably mounted in the rotating groove 1011, a pair of stationary contact assemblies are respectively placed in the two mounting grooves 1012, and the wiring assembly 13 connected to the stationary contact assemblies is also mounted in the mounting grooves 1012 and is opposite to the wiring groove 10121. Of course, as other degraded embodiments, the wiring grooves 10121 of adjacent contact modules a may also be aligned.

In this embodiment, the static contact assembly includes a conductive plate disposed in the assembly slot 1012, one end of the conductive plate is matched with the wiring slot 10121 disposed on the side wall of the housing 10 for wiring, the edge of the plate surface of the conductive plate far away from the wiring slot 10121 protrudes outwards to form the static contact portion 120, the static contact portion 120 and the conductive plate are located on the same plane, wherein the static contact portion 120 is integrally in a plate-shaped structure, the static contact portion 120 is parallel to the first conductive plates, and when the movable contact portion 112 contacts with the static contact portion 120, the static contact portion 120 is located between the two first conductive plates and is elastically clamped. In addition, in the present embodiment, the static contact portion 120 has a V-shape overall, and has a small occupied space, is convenient to fit in the mounting groove 1104, and facilitates the mating contact with the movable contact portion 112. As another embodiment, the static contact portion 120 may be a convex shape.

As shown in fig. 1, 5 and 6, the conductive plate of the present embodiment is a V-shaped second conductive plate 121, the protruding area in the middle of the second conductive plate 121 is used as the static contact portion 120, two opposite end portions of the second conductive plate 121 are respectively bent and extended to form a pair of opposite wiring boards 1211, preferably, the board surface of each wiring board 1211 is perpendicular to the board surface of the second conductive plate 121, and a wiring hole 1212 is provided in the middle of each wiring board 1211, the static contact assembly is mounted in the mounting groove 1012, the V-shaped static contact portion 120 corresponds to the sector-shaped notch of the arc isolation portion 110, the wiring boards 1211 are adjacent to the wiring groove 10121, and the wiring hole 1212 is coaxial with the operation hole 10122.

That is, as shown in fig. 1, the V-shaped second conductive plate 121 includes two second conductive plates 123, the two second conductive plates 123 are located on the same plane, one ends of the two second conductive plates 123 are connected to form the static contact portion 120, and the other ends of the two second conductive plates 123 are respectively connected to the two terminal plates 1211 in a bending manner, so that the connected two second conductive plates 123 form a V-shaped groove between the two terminal plates 1211.

In this embodiment, as shown in fig. 1, 5 and 6, each fixed contact assembly is connected with a set of wire connecting assemblies 13, wherein the wire connecting assemblies 13 comprise wire connecting screws, wherein the wire connecting screws are assembled with wire pressing plates parallel to the wire connecting plate 1211, the wire connecting holes 1212, the wire connecting screws and the operation holes 10122 are coaxial, so that the operation wire connecting screws can conveniently move in the assembling grooves 1012, and the central axis of the wire connecting grooves 10121 is perpendicular to the central axis of the wire connecting holes 1212. It is apparent that other wiring structures such as a structure with a wire holder and a wire screw, or a plug-in wiring structure with a wire clip, etc. may be adopted for the wiring assembly 13.

In this embodiment, as shown in fig. 5 to 8, the moving contact assembly 11 includes an arc isolation portion 110, the arc isolation portion 110 is rotationally matched with the housing 10 (base), a contact groove 1103 is formed around an outer side wall of the arc isolation portion 110, a mounting groove 1104 communicated with the contact groove 1103 is formed at an edge of the arc isolation portion 110, preferably the mounting groove 1104 is a through groove, at this time, the mounting groove 1104 penetrates through the contact groove 1103 in a direction parallel to an axis line direction of the arc isolation portion 110, a notch is reserved on two end faces of the mounting groove 1104 correspondingly, a shape of the notch is preferably matched with a shape of a static contact portion 120 of the static contact assembly, when the contact assembly is assembled, the moving contact assembly 11 and the pair of static contact portions 120 can be avoided through the notch, and the static contact portion 120 can be rotated into the contact groove 1103 from the mounting groove 1104 to be matched with the moving contact portion 112, so that an assembling step is simplified. Of course, the mounting groove 1104 may not be provided, but is somewhat cumbersome during assembly.

As shown in fig. 6 and 8, a pair of movable contact parts 112 are disposed in the contact groove 1103, preferably, each movable contact part 112 is located in the contact groove 1103 between two mounting grooves 1104, and the pair of movable contact parts 112 form a rotationally symmetrical structure about the axis of the arc isolation part 110, and the movable contact parts 112 avoid the positions of the mounting grooves 1104, so that the movable contact parts 112 and the static contact parts 120 are in contact fit in the contact groove 1103, thereby improving the operation safety; further, the pair of movable contact portions 112 are formed by two ends of the movable contact bridge 111, so that the structure is simplified, the rotation synchronism of the pair of movable contact portions 112 is improved, preferably, an installation cavity 1106 for assembling the movable contact bridge 111 is radially arranged in the middle of the arc isolation portion 110, two ends of the installation cavity 1106 are respectively communicated with the contact groove 1103, at this time, the movable contact portion 112 is located at the connection position of the installation cavity 1106 and the contact groove 1103, the movable contact bridge 111 is limited in the installation cavity, and the stability of the structure is improved.

Preferably, the arc separating parts 110 of two adjacent contact units 1 are in plug-in fit, one end of each arc separating part 110 is provided with a rotary supporting part 1105, the end face of each rotary supporting part 1105 is provided with at least two first positioning parts, the first positioning parts are symmetrical with respect to the axis of each rotary supporting part 1105, the other end of the same arc separating part 110 is provided with at least two second positioning parts 11013, the second positioning parts 11013 are in plug-in connection with the first positioning parts of the adjacent arc separating parts 110 in a one-to-one correspondence manner, and further, every two first positioning parts are arranged in pairs, so that the first positioning parts and the second positioning parts 11013 are respectively positioned at two sides of the axis, the rotary synchronism and the positioning performance of two adjacent movable contact assemblies 11 are improved, and the rotary driving arms of two adjacent contact units 1 are lengthened under the condition of the same rotary torque, and synchronous rotation is facilitated.

A specific structure of the moving contact assembly 11 is provided in connection with fig. 5, 6 and 8, and the moving contact assembly 11 includes an arc-isolating portion 110 and a moving contact bridge 111 disposed along a radial direction of the arc-isolating portion 110.

As shown in fig. 8, the arc-isolating part 110 includes a first arc-isolating plate 1101 and a second arc-isolating plate 1102, the first arc-isolating plate 1101 and the second arc-isolating plate 1102 are opposite to each other at intervals, a gap serving as a contact groove 1103 is left between the edge of the first arc-isolating plate 1101 and the edge of the second arc-isolating plate 1102, a pair of first notch grooves 11011 are respectively formed on two side edges of the first arc-isolating plate 1101, a pair of second notch grooves 11021 are respectively formed on two side edges of the second arc-isolating plate 1102, each first notch groove 11011 corresponds to one second notch groove 11021 to form a mounting groove 1104, in fig. 8, the first notch groove 11011 and the second notch groove 11021 are all fan-shaped notches, and the central angles of the first notch groove 11011 and the second notch groove 11021 are equal to or greater than the end included angles of the V-shaped static contact part 120.

Preferably, the first arc-shaped plate 1101 and the second arc-shaped plate 1102 are in plug-in fit, so that the first arc-shaped plate 1101 and the second arc-shaped plate 1102 are assembled into a whole. A circular boss is formed in the middle of one side plate surface of the first arc-shaped plate 1101 in a protruding mode, the circular boss is used as a rotation supporting portion 1105 to be assembled in a rotation groove 1011 of a base in a rotating mode, two insertion holes serving as first positioning portions are formed in the end face of the rotation supporting portion 1105, two first positioning portions respectively form a rotation symmetrical structure relative to the axis of the first arc-shaped plate 1101, two protruding shafts are arranged on one side, opposite to the rotation supporting portion 1105, of the first arc-shaped plate 1101 in a protruding mode, the two protruding shafts serve as second positioning portions 11013, two through holes 11022 are formed in the plate surface of the second arc-shaped plate 1102, the two second positioning portions 11013 respectively penetrate through the through holes 11022 of the second arc-shaped plate 1102 and are connected with the first positioning portions of the adjacent arc-shaped portions 110 in an inserting mode, and the shapes of the first positioning portions and the through holes 11022 are matched with the cross-section shapes of the second positioning portions 11013.

In the embodiment, the movable contact bridge 111 is assembled between the two second positioning portions 11013 in a limited manner, and the first arc-shaped plate 1101 and the second arc-shaped plate 1102 in a plug-in fit are beneficial to clamping the movable contact bridge 111.

As shown in fig. 8, a mounting cavity 1106 for mounting the movable contact bridge 111 is formed between the first arc-shaped plate 1101 and the second arc-shaped plate 1102, grooves arranged along the radial direction are formed on the plate surface of the first arc-shaped plate 1101 and/or the second arc-shaped plate 1102, after the first arc-shaped plate 1101 and the second arc-shaped plate 1102 are inserted, the radial grooves correspond to the mounting cavity 1106, and the movable contact bridge 111 is mounted in the mounting cavity 1106 in a limited manner.

Further, a foolproof structure may be disposed between the side wall of the mounting cavity 1106 and the movable contact bridge 111, where the foolproof structure includes a foolproof protrusion 11061 and a foolproof groove 1114 that are matched with each other, so that the movable contact bridge 111 can be positioned, and the movable contact bridge 111 can be prevented from being installed in a dislocation manner.

Further, a clamping structure is further arranged between the first arc-shaped plate 1101 and the second arc-shaped plate 1102, the clamping structure comprises a clamping buckle 11071 and a clamping groove 11072 which are matched with each other, the clamping structure can further improve the plug-in stability of the first arc-shaped plate 1101 and the second arc-shaped plate 1102, the first arc-shaped plate 1101 and the second arc-shaped plate 1102 are also facilitated to clamp the movable contact bridge 111, as shown in fig. 8, two clamping grooves 11072 are arranged on two sides outside the radial groove of the first arc-shaped plate 1101, correspondingly, two clamping buckles 11071 are arranged on two sides outside the radial groove of the second arc-shaped plate 1102, and preferably, the two clamping buckles 11071 (the two clamping grooves 11072) form a rotationally symmetrical structure about the axis of the arc-shaped plate 110. Of course, the first arc-shaped plate 1101 and the second arc-shaped plate 1102 may be fixedly connected by screws.

As shown in fig. 8, the movable contact bridge 111 includes two first conductive plates, two ends of each of which are respectively bent and extended outwards to form a first conductive sheet, the middle parts of the two first conductive plates are connected, and a fool-proof groove matched with a fool-proof protrusion is disposed on a side edge of each of the first conductive plates, in this embodiment, the first conductive sheet 1121 is parallel to an end surface of the arc isolation portion 110, that is, parallel to the first arc isolation plate 1101 and the second arc isolation plate 1102.

Each of the arc extinguishing chambers 1017 is assembled with one arc extinguishing chamber 14, so that a pair of arc extinguishing chambers 14 are arranged along the circumferential direction of the moving contact assembly 11 and the arc extinguishing chambers 14 are positioned between the static contact portion 120 and the moving contact portion 112 when the moving contact assembly is in the opening position, the two arc extinguishing chambers 14 form a rotationally symmetrical structure about the moving contact assembly 11, the arc generated by breaking of the contact system by the arc extinguishing chambers 14 is extinguished, high-temperature gas of the arc extinguishing chambers 14 is discharged from the wiring groove 10121 after passing through the assembling groove 1012 through the vent holes 10172, in this embodiment, the operation holes 10122 can also discharge the high-temperature gas, further, as shown in fig. 5-7, one end of the arc extinguishing chamber 1017 opposite to the vent holes 10172 is closed by the arc separating ribs 10171, so that the arc separating ribs 10171 are used for preventing the high-temperature gas of the arc extinguishing chambers 14 from burning the moving contact assembly 11 when in the opening position.

It should be noted that, in the description of the present utility model, the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate an orientation or a positional relationship based on that shown in the drawings or an orientation or a positional relationship conventionally put in use, and are merely for convenience of description, and do not indicate that the apparatus or element to be referred to must have a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating relative importance.

The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.

Claims (10)

1. The static contact assembly comprises a second conductive plate (121), and is characterized in that: the second conductive plate (121) is connected with a pair of wiring boards (1211) which are opposite at intervals, and a static contact part (120) is formed by extending the middle edge of the second conductive plate (121) to be parallel to the second conductive plate (121) in an outward protruding mode.

2. The stationary contact assembly of claim 1, wherein: the pair of wiring boards (1211) are respectively connected to two ends of the second conductive board (121), the board surface of each wiring board (1211) is perpendicular to the board surface of the second conductive board (121), one wiring hole (1212) is formed in the middle of each wiring board (1211), and the central axis of each wiring hole (1212) is parallel to the board surface of the second conductive board (121).

3. The stationary contact assembly according to claim 1 or 2, characterized in that: the second conductive plate (121) is in a V shape as a whole, two end parts of the second conductive plate (121) are respectively bent and extended to form a pair of wiring boards (1211) with opposite intervals, and a convex area in the middle of the second conductive plate (121) is used as a static contact part (120).

4. A stationary contact assembly according to claim 3, characterized in that: the V-shaped second conductive plate (121) comprises two second conductive plates (123) which are positioned on the same plane, one ends of the two second conductive plates (123) are connected to form the static contact part (120), and the other ends of the two second conductive plates (123) are respectively connected with the two wiring boards (1211) in a bending way, so that the two connected second conductive plates (123) form a V-shaped groove between the two wiring boards (1211).

5. The contact unit comprises a shell (10) and a movable contact assembly (11) rotationally assembled in the shell (10), and is characterized in that: a pair of stationary contact assemblies according to any one of claims 1-4 are assembled in the housing (10), the stationary contact portion (120) of each stationary contact assembly being in contact with or separated from the moving contact portion (112) of the moving contact assembly (11).

6. The contact unit of claim 5, wherein: the contact unit (1) further comprises a wiring assembly (13) connected with the fixed contact assembly, the wiring assembly (13) comprises wiring screws, the wiring screws are provided with wire pressing plates parallel to the wiring plates (1211), and the wiring screws are correspondingly assembled in wiring holes (1212) of one wiring plate (1211).

7. The contact unit according to claim 5 or 6, characterized in that: the movable contact assembly further comprises at least one arc extinguishing chamber (14), wherein the arc extinguishing chamber (14) is arranged along the circumferential direction of the movable contact assembly (11), and the arc extinguishing chamber (14) is positioned between the static contact part (120) and the movable contact part (112) at the opening position.

8. The contact unit of claim 7, wherein: the pair of fixed contact assemblies are respectively positioned on two opposite sides of the movable contact assembly (11), two arc-extinguishing chambers (14) are arranged in the shell (10), and the two arc-extinguishing chambers (14) form a rotationally symmetrical structure relative to the movable contact assembly (11).

9. The contact unit of claim 8, wherein: a pair of arc extinguishing grooves (1017) for assembling the arc extinguishing chambers (14) are formed in the shell (10), a pair of assembling grooves (1012) for assembling the 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; one end of the assembly groove (1012) is communicated with a wiring groove (10121) formed in the side wall of the shell (10), a vent hole (10172) used for being communicated with the assembly groove (1012) is formed in the arc extinguishing groove (1017), and one end of the assembly groove (1012) opposite to the vent hole (10172) is closed by an arc isolation rib (10171).

10. An isolating switch comprising an operating module (b) and a contact module (a) driven by the operating module (b), characterized in that: the contact module (a) comprising at least one layer of contact units (1) according to any one of claims 5-9.