CN220381937U - Contact unit and isolating switch - Google Patents

Abstract

The contact unit comprises a base and a contact system, the contact system comprises a moving contact assembly and a pair of static contact assemblies, the moving contact assemblies are rotationally assembled in the middle of an assembly cavity of the base, a pair of assembly grooves are formed in the assembly cavities on two sides of the moving contact assemblies, the pair of assembly grooves are respectively correspondingly communicated with a pair of wire grooves on the same side of the base, the pair of static contact assemblies in the assembly cavities are respectively and limitedly placed in the pair of assembly grooves, one ends of the pair of static contact assemblies extend out of the base from the wiring grooves as pin ends, and the pin ends are welded with an external circuit board or are spliced with external electrical appliances. In the utility model, the assembly groove is arranged in the assembly cavity of the base and is communicated with the wiring groove, so that the static contact assembly can be limited and placed in the assembly groove.

Description

Contact unit and isolating switch

Technical Field

The utility model relates to the field of piezoelectric devices, in particular to 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, and the base of each contact unit has the following defects: firstly, a linear conductive plate is generally required to be embedded in a shell, so that the assembly process is complicated; secondly, the butt joint parts of two adjacent bases are poor in tightness and the air tightness of the contact module is easy to influence; thirdly, the pin ends of the static contact assembly extend out of the base from the wiring groove, and as the distance between two adjacent pin ends is smaller, the isolation effect is poorer, and the mutual influence is easy; fourth, the existing base does not have a mating area for mounting the circuit board.

Disclosure of Invention

The utility model aims to overcome at least one defect in the prior art and provide a contact unit 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 contact unit comprises a base and a contact system, wherein the contact system comprises a moving contact assembly and a pair of static contact assemblies, the moving contact assemblies are rotationally assembled in the middle of an assembly cavity of the base, a pair of assembly grooves are formed in the assembly cavities on two sides of the moving contact assemblies, the pair of assembly grooves are respectively correspondingly communicated with a pair of wire grooves on the same side of the base, the pair of static contact assemblies in the assembly cavities are respectively and limitedly placed in the pair of assembly grooves, one ends of the pair of static contact assemblies serve as pin ends, extend out of the base from a wiring groove, and the pin ends are welded with an external circuit board or are spliced with an external electrical appliance.

Further, a mutually matched packaging structure is arranged between two adjacent bases which are arranged in a stacked mode, the packaging structure comprises a packaging wall and a packaging groove which are mutually inserted, the packaging wall is formed by extending part of edges of the outer side walls of the bases in parallel in an outward protruding mode, and the packaging groove is formed by recessing part of edges of the outer side walls of the bases.

Further, the outer side wall surrounding each base is provided with a packaging wall and/or a packaging groove, part of the edge of the packaging wall is convexly provided with a guard plate, the packaging groove is provided with a matching groove matched with the guard plate, and the guard plate and the matching groove are positioned on the outer side wall of the base corresponding to the static contact assembly.

Further, the base protrusion that is facing away from the assembly cavity is provided with at least a pair of compression boss, compression boss is used for compressing the stationary contact subassembly of placing in the assembly cavity of adjacent base.

Further, at least one arc extinguishing groove is arranged in the assembly cavity, and the arc extinguishing groove is arranged along the circumference of the moving contact assembly and is communicated with the assembly groove.

Further, one of the arc extinguishing grooves and the two assembly grooves are positioned on the same side of the movable contact assembly and share one side groove wall with one of the assembly grooves.

Further, the movable contact assembly comprises an arc isolation part and a movable contact bridge, the arc isolation part is in running fit with the base, a contact groove is formed in the radial outer side wall of the arc isolation part, an installation groove communicated with the contact groove is formed in the edge of the arc isolation part, and the installation groove penetrates through the contact groove along the axis direction parallel to the arc isolation part;

the static contact assembly comprises a third conductive plate, wherein the middle part of the third conductive plate is bent, so that two ends of the third conductive plate are respectively positioned on two parallel planes, one end of the third conductive plate is used as a pin end to extend out of the base from the wiring groove, the other end side of the third conductive plate is laterally and obliquely outwards extended to form a V-shaped static contact part, and one end, connected with the static contact part, of the third conductive plate is positioned on the same plane as the static contact part; the static contact part is matched with the mounting groove.

Further, the edge of each wiring groove protrudes outwards to form a pin groove encircling the outer side of the pin end.

Further, the lateral wall of base still is provided with a pair of locating plate, and a pair of locating plate is located between a pair of pin groove of same base, and the interval between a pair of locating plate forms fixed minute groove, and the fixed minute groove of two adjacent bases corresponds the intercommunication and forms and be used for the fixed slot, be provided with at least one fixed boss that is used for spacing in the fixed slot.

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.

According to the contact unit and the isolating switch, the assembly groove is formed in the assembly cavity of the base and is communicated with the wiring groove, so that the static contact assembly can be limited and placed in the assembly groove.

In addition, the packaging structure is arranged between the two adjacent bases which are arranged in a stacked mode, so that the air tightness of the contact module is guaranteed.

In particular, the packaging wall and the packaging groove are respectively arranged around the outer side wall of the base, wherein the packaging wall is also provided with a guard board, and the packaging groove is provided with a matching groove matched with the guard board, so that the plugging stability of the packaging structure is guaranteed.

In addition, the pin end of the static contact assembly extends out of the wiring groove of the base, the edge of the wiring groove surrounds the pin end to form a pin groove, and the pin groove can be used for protecting the pin end and isolating the pin ends of two adjacent layers of contact units, so that the use safety is improved.

In addition, a fixing boss for fixing the circuit board is further arranged between the pair of pin grooves, so that the circuit board can be assembled conveniently.

Drawings

FIG. 1 is a schematic diagram of an isolating switch according to the present utility model;

FIG. 2 is a schematic illustration of the mating of the housings of two contact units according to the present utility model;

FIG. 3 is a schematic view of the structure of the contact unit in the present utility model;

FIG. 4 is a schematic view showing the internal structure of the contact unit in the present utility model;

FIG. 5 is a schematic view of the structure of two contact units in the present utility model;

FIG. 6 is a schematic view of the structure of the base of the present utility model;

FIG. 7 is a schematic view of a moving contact assembly according to the present utility model;

FIG. 8 is a schematic structural view of a first arc-shaped plate (an end with a first positioning portion) according to the present utility model;

FIG. 9 is a schematic view of the structure of a first arc-shaped plate (an end with a second positioning portion);

FIG. 10 is a schematic view of a second arc shield according to the present utility model;

FIG. 11 is a schematic diagram of a movable contact bridge according to the present utility model;

fig. 12 is a schematic structural view of a first conductive plate according to the present utility model;

fig. 13 is a schematic structural view of a third conductive plate according to the present utility model;

reference numerals:

a-contact module, 1-contact unit, 10-housing, 1011-rotation groove, 1012-fitting groove, 10122-operation hole, 1013-pin groove, 1014-package wall, 10141-guard plate, 1015-package groove, 10151-fitting groove, 10161-positioning plate, 10162-fixing parting groove, 10163-fixing boss, 1017-arc extinguishing groove, 10171-arc-isolating rib, 10172-ventilation hole, 1018-compressing boss, 11-moving contact assembly, 110-arc-isolating part, 1101-first arc-isolating plate, 11011-first notch groove, 11012-first positioning part, 11013-second positioning part, 1102-second arc-isolating plate, 11021-second notch groove, 11022-through hole, 1103-contact groove, 1104-installation groove, 1105-rotation support part, 1106-installation cavity, 11061-foolproof protrusion, 11071-buckle, 11072-clamping groove, 111-movable contact bridge, 1111-first conductive plate, 1112-installation boss, 1113-installation groove, 1114-foolproof groove, 112-movable contact part, 1121-first conductive plate, 120-static contact part, 122-third conductive plate, 1221-pin end, 14-arc extinguishing chamber, b-operation module, 20-module shell, 21-operation mechanism, 22-operation member.

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. 1, 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 and is in driving connection with the contact module a, and the other end of the operation mechanism 21 is used as an operation end and extends 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, preferably the shell 10 comprises a base, an interconnecting contact system and a wiring assembly are assembled in an assembly cavity of the base, the switching-on/off of the contact system is driven by a driving end, the wiring assembly is matched with a wiring groove formed in the side wall of the base and used for external wiring, when the contact module a comprises two or more contact units 1, the adjacent two contact units 1 are arranged in a stacked mode, the driving end can penetrate through the contact module a and 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, 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 a base, 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, 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 driving end drives the moving contact assembly 11 to rotate in the base, so that the pair of moving contact parts 112 are respectively contacted with or separated from the fixed contact parts 120 of the pair of fixed contact assemblies, thereby realizing closing or opening of the contact system.

The improvement point of the application lies in that, as shown in fig. 3-6, the moving contact assembly 11 is rotationally assembled in the middle part of the assembly cavity of the base, a pair of assembly grooves 1012 are arranged in the assembly cavities at two opposite sides of the moving contact assembly 11, the pair of assembly grooves 1012 are respectively correspondingly communicated with a pair of wire grooves 10121 positioned at the same side of the base, a pair of static contact assemblies positioned in the assembly cavities are respectively and limitedly placed in the pair of assembly grooves 1012, one ends of the pair of static contact assemblies are used as pin ends 1221 to extend out of the base from the wiring groove, the assembly grooves 1012 are communicated with the wiring groove, the static contact assemblies can be limitedly placed in the assembly grooves 1012, and compared with the existing static contact assemblies, the structure of embedding installation is adopted.

Further, as shown in fig. 1-6, a mutually matched packaging structure is arranged between two adjacent bases, the packaging structure comprises a packaging wall 1014 and a packaging groove 1015 which are mutually spliced, wherein the packaging wall 1014 is formed by extending out and protruding a part of the edge of the outer side wall of the base in parallel, the packaging wall 1014 is formed by recessing a part of the edge of the outer side wall of the base, and the packaging structure is beneficial to ensuring the air tightness of the contact module a.

Preferably, as shown in fig. 2, a packaging wall 1014 and/or a packaging groove 1015 is provided around the outer side wall of each base, where part of the edge of the packaging wall 1014 protrudes to form a guard plate 10141, the packaging groove 1015 is provided with a matching groove 10151 matched with the guard plate 10141, 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, so that the plugging stability of the packaging structure is guaranteed.

Preferably, the edge of each wiring groove protrudes outwards to form a pin groove 1013 surrounding the outer side of the pin end 1221, and the pin groove 1013 surrounding the outer side of the pin end 1221 can be used for protecting the pin end 1221 of the static contact assembly and isolating the pin ends 1221 of two adjacent layers of contact units 1, so that the use safety is improved.

Preferably, as shown in fig. 4, a pair of positioning plates 10161 is further disposed on the outer side wall of the base, the pair of positioning plates 10161 are located between the pair of pin grooves 1013 of the same base, a fixing sub-groove 10162 is formed at the interval between the pair of positioning plates 10161, the fixing sub-grooves 10162 of two adjacent bases are correspondingly communicated to form a fixing groove, and a fixing boss 10163 for fixing the circuit board is disposed in the fixing groove, so that the circuit board is convenient to assemble.

A specific embodiment of an isolating switch is provided in connection with fig. 1-13.

The isolating switch comprises an operating module b and a contact module a which are arranged in a stacked manner, wherein the operating module b comprises a module shell 20 and an operating mechanism 21 arranged in the module shell 20, the driving end of the operating mechanism 21 is connected with the contact module a in a linkage manner, the operating end of the operating mechanism 21 extends out of the module shell 20 and is used for driving the operating mechanism 21 from the outside, the operating end is connected with a knob serving as an operating member 22, and the driving connection of the operating mechanism 21 and the contact module a in the embodiment adopts the prior art.

As shown in fig. 1-5, the contact module a includes four contact units 1 that are stacked in sequence, each contact unit 1 includes a housing 10, a contact system disposed in the housing 10, and two groups of arc-extinguishing chambers 14, the contact system includes a moving contact assembly 11 and a pair of fixed 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 fixed contact assemblies are respectively disposed on two opposite sides of the moving contact assembly 11, each group of fixed contact assemblies cooperates with a wiring slot formed in a side wall of the housing 10, and the two arc-extinguishing chambers 14 are respectively 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.

As shown in fig. 1-6, the housing 10 comprises a rectangular base, one side of the base forms an assembling cavity for assembling the contact system and the arc extinguishing chamber 14, a circular rotating slot 1011 is arranged in the middle of the base, assembling slots 1012 are respectively arranged at two opposite sides of the rotating slot 1011, a pair of wire connecting slots are arranged on the same side wall of the base connected between a pair of assembling slots 1012, one end of each assembling slot 1012 is communicated with a wire connecting slot, the assembling slots 1012 and the wire connecting slots are arranged along the side edge positions of the base in fig. 6, namely, the pair of assembling slots 1012 are respectively arranged along the upper side edge and the lower side edge of the base, and the pair of wire connecting slots are respectively arranged at the upper end and the lower end of the right side wall of the base and are respectively communicated with one assembling slot 1012; the lead grooves 1013 are protruded and extended outwards from the edge of each wiring groove, the lead grooves 1013 can be used for isolating two adjacent lead ends 1221, in the embodiment, the wiring grooves are rectangular, the three edges of the wiring grooves respectively extend outwards to form U-shaped lead grooves 1013, the openings of the U-shaped lead grooves 1013 face upwards in the figure, and all the lead grooves 1013 are positioned on the same side of the contact module a; a pair of arc extinguishing grooves 1017 are provided along the 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, at this time, one of the arc extinguishing grooves 1017 is located on the same side of the rotating groove 1011 as the two fitting grooves 1012 and is adjacent to and communicates with one of the fitting grooves 1012, that is, the arc extinguishing grooves 1017 share one side wall with the fitting grooves 1012 as the groove wall, and a vent hole 10172 is provided in the shared side wall, the other arc extinguishing groove 1017 communicates with the fitting groove 1012 by providing the vent hole 10172 in the side wall, that is, in fig. 6, the arc extinguishing groove 1017 located on the right side is adjacent to and communicates with the fitting groove 1012 on the lower side, the arc extinguishing groove 1017 located on the left side is communicated with the fitting groove 1012 on the upper side, the vent hole 10172 is located on the left side edge of the arc extinguishing groove 1017 on the left side, and the arc extinguishing groove 1017 on the left side is far from the fitting groove 1012 on the upper side, but communication can be maintained, preferably, and a communication groove may be provided between the two.

As shown in fig. 1-5, a mutually matched packaging structure is arranged between two adjacent bases, the packaging structure comprises a packaging wall 1014 and a packaging groove 1015 which are mutually spliced, wherein the packaging wall 1014 is formed by extending part of the edge of the outer side wall of each base in a parallel and outward protruding way, preferably, the packaging wall 1014 is arranged around the outer side wall of each base, and part of the edge of the packaging wall 1014 is further formed into a guard plate 10141 in a protruding way; the packaging groove 1015 is formed by partially recessing the edge of the outer side wall of the base, preferably, the packaging groove 1015 is also disposed around the edge of the outer side wall of the base, and a matching groove 10151 matched with the guard plate 10141 is disposed in the packaging groove 1015, where the guard plate 10141 and the matching groove 10151 are respectively located on the outer side wall of the base corresponding to the matching groove 1012. In this embodiment, the base at the bottom is provided with a packaging wall 1014 only at the upper edge of the side wall, the other bases are respectively provided with a packaging wall 1014 and a packaging groove 1015, the packaging wall 1014 is located at the 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, and correspondingly, the lower edge of the outer side wall of the module housing 20 adjacent to the base at the top is also provided with a packaging groove 1015 and a matching groove 10151 correspondingly.

As shown in fig. 2, at least one pair of pressing bosses 1018 are provided to protrude from a side of the base facing away from the mounting chamber, the pressing bosses 1018 being respectively opposed to the mounting grooves 1012 of the adjacent bases for pressing the stationary contact assemblies placed in the mounting grooves 1012, that is, the stationary contact assemblies placed in the mounting grooves 1012 are pressed between the pressing bosses 1018 and the groove bottom walls of the mounting grooves 1012 when the two bases are stacked. As shown in fig. 4-6, a pair of positioning plates 10161 are further disposed on the outer side wall of the base, the pair of positioning plates 10161 are located between the pair of pin grooves 1013 of the same base, the space between the pair of positioning plates 10161 forms a fixing sub-groove 10162, the fixing sub-grooves 10162 of two adjacent bases are correspondingly communicated to form a fixing groove, further, at least one fixing boss 10163 is protruding in one of the fixing sub-grooves 10162, at this time, at least one fixing boss 10163 is disposed in the fixing groove, and the circuit board is fixed by the fixing boss 10163, so that the circuit board is convenient to assemble.

In this embodiment, as shown in fig. 3 to 12, the moving contact assembly 11 includes an arc isolation part 110, the arc isolation part 110 is rotationally matched with the housing 10 (base), and a contact groove 1103 is formed around the outer side wall of the arc isolation part 110, in this embodiment, the moving contact assembly 11 includes the arc isolation part 110 and a moving contact bridge 111, the arc isolation part 110 is rotationally matched with the housing 10 (base), and a contact groove 1103 is formed around the radial outer side wall of the arc isolation part 110, a mounting groove 1104 communicated with the contact groove 1103 is formed at the edge of the arc isolation part 110, preferably the mounting groove 1104 is a through groove, at this time, the mounting groove 1104 penetrates through the contact groove 1103 in the axial direction parallel to the arc isolation part 110, a notch is formed on two end surfaces of the arc isolation part 110, the notch shape is preferably matched with the shape of the static contact part 120 of the static contact assembly, and when the contact assembly is assembled, the moving contact assembly 11 and the pair of static contact parts 120 can be avoided through the notch, and the static contact part 120 can be transferred into the contact groove from the mounting groove to be matched with the moving contact part 112, thereby simplifying the assembly steps.

A pair of movable contact parts 112 are arranged in the contact groove 1103, preferably, each movable contact part 112 is positioned in the contact groove 1103 between two mounting grooves 1104, 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, the installation cavity 1106 radially penetrates through 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 joint of the installation cavity 1106 and the contact groove 1103, the movable contact bridge 111 is limited in the joint, and the stability of the structure is improved.

Preferably, the arc isolating parts 110 of two adjacent contact units 1 are in plug-in fit, a rotating supporting part 1105 is arranged at one end of each arc isolating part 110, at least two first positioning parts 11012 are arranged on the end face of each rotating supporting part 1105, the first positioning parts 11012 are symmetrical about the axis of each rotating supporting part 1105, preferably, the first positioning parts 11012 are arranged in pairs, each pair of first positioning parts 11012 are symmetrical about the axis of each rotating supporting part 1105, at least two second positioning parts 11013 are arranged at the other end of the same arc isolating part 110, the second positioning parts 11013 are in plug-in one-to-one correspondence with the first positioning parts 11012 of the adjacent arc isolating parts 110, so that the first positioning parts 11012 and the second positioning parts 11013 are respectively positioned at two sides of the axis, the rotation synchronism and the positioning performance of two adjacent movable contact assemblies 11 are improved, and under the condition of the same rotation torque, the rotation driving power arms of two adjacent contact units 1 are lengthened, and synchronous rotation is facilitated.

A specific structure of the moving contact assembly 11 is provided in connection with fig. 7 to 12, where the moving contact assembly 11 includes an arc isolation portion 110 and a moving contact bridge 111 disposed along a radial direction of the arc isolation portion 110.

As shown in fig. 7, the arc isolation portion 110 includes a 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 and opposite, a gap serving as a contact groove 1103 is left between the edge of the first arc isolation plate 1101 and the edge of the second arc isolation plate 1102, a pair of first notch grooves 11011 are respectively formed on two side edges of the first arc isolation plate 1101, a pair of second notch grooves 11021 are respectively formed on two side edges of the second arc isolation plate 1102, each first notch groove 11011 corresponds to one second notch groove 11021 to form a mounting groove 1104, and in fig. 7-10, the first notch grooves 11011 and the second notch grooves 11021 are all fan-shaped notches.

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, a pair of insertion holes serving as first positioning portions 11012 are formed in the end face of the rotation supporting portion 1105, the pair of first positioning portions 11012 respectively form a rotationally symmetrical structure with respect to the axis of the first arc-shaped plate 1101, a pair of 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 pair of protruding shafts serve as second positioning portions 11013, a pair of through holes 11022 are formed in the plate surface of the second arc-shaped plate 1102, the pair of second positioning portions 11013 respectively penetrate through the through holes 11022 of the second arc-shaped plate 1102 to be inserted into the first positioning portions 11012 of the adjacent arc-shaped portions 110, and the shapes of the first positioning portions 11012 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 pair of second positioning portions 11013 in a limited manner, and the first arc-stop 1101 and the second arc-stop 1102 are in plug-fit with each other to facilitate clamping the movable contact bridge 111.

The installation cavity 1106 for assembling the movable contact bridge 111 is formed between the first arc-shaped plate 1101 and the second arc-shaped plate 1102, grooves which are arranged along the radial direction are formed on the 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 installation cavity 1106 is correspondingly formed by the radial grooves, the movable contact bridge 111 passes through the pair of second positioning parts 11013, and is installed in the installation cavity 1106 in a limiting mode, further, a foolproof structure can be arranged between the side wall of the installation cavity 1106 and the movable contact bridge 111, and comprises foolproof protrusions 11061 and foolproof grooves 1114 which 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 misplacement mode.

As shown in fig. 7, 9 and 10, a radial groove is formed on the plate surface of the first arc barrier 1101 between the pair of second positioning portions 11013, foolproof protrusions 11061 are protruding from the side walls of the radial groove, the foolproof protrusions 11061 of the embodiment are rotationally symmetrical with respect to the axis of the first arc barrier 1101, and correspondingly, a radial groove is also formed between the pair of through holes 11022 of the second arc barrier 1102, when the pair of second positioning portions 11013 are inserted into the pair of through holes 11022, the radial grooves of the first arc barrier 1101 and the second arc barrier 1102 are abutted to form a mounting cavity 1106 for assembling the movable contact bridge 111, preferably, foolproof protrusions 11061 are protruding from the side walls of the radial groove of the second arc barrier 1102, but the foolproof protrusions 11061 of the second arc barrier 1102 and the foolproof protrusions 11061 of the first arc barrier 1101 are not completely corresponding, so that the movable contact bridge 111 is limited and clamped in the mounting cavity 1106 from all directions. Of course, the movable contact bridge 111 may be retained within the mounting cavity 1106 in other manners.

Further, a clamping structure is further disposed between the first arc-shaped plate 1101 and the second arc-shaped plate 1102, the clamping structure includes a buckle 11071 and a clamping groove 11072 that are matched with each other, the clamping structure can further improve the plugging stability of the first arc-shaped plate 1101 and the second arc-shaped plate 1102, and is also beneficial to the first arc-shaped plate 1101 and the second arc-shaped plate 1102 to clamp the movable contact bridge 111, as shown in fig. 7, 9 and 10, two clamping grooves 11072 are disposed on two sides of the outer side of the radial groove of the first arc-shaped plate 1101, correspondingly, two buckles 11071 are disposed on two sides of the outer side of the radial groove of the second arc-shaped plate 1102, and preferably, the two buckles 11071 (the two clamping grooves 11072) form a rotationally symmetrical structure about the axis of the arc-shaped portion 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. 11 and 12, the movable contact bridge 111 includes two first conductive plates 1111, two ends of each first conductive plate 1111 are respectively bent and extended outwards to form a first conductive plate 1121, the first conductive plates 1121 are basically parallel to the first conductive plates 1111 and located on different planes, two first conductive plates 1121 located at the same end of the two first conductive plates 1111 are opposite to each other at intervals to form a movable contact portion 112 capable of clamping the static contact portion 120, the two first conductive plates 1121 have a static contact portion 120 capable of elastically clamping the static contact assembly, the middle of the two first conductive plates 1111 is connected with the side edge of each first conductive plate 1111 and is provided with a foolproof groove 1114 matched with the foolproof protrusion 11061, in fig. 9 and 10, the protruding portion of the foolproof protrusion 11061 is arc-shaped, the foolproof groove 1114 is corresponding to an arc-shaped, in this embodiment, the first conductive plates 1121 are parallel to the end faces of the arc-isolating portion 110, that is parallel to the first isolating plate 1101 and the second isolating plate 1102, preferably, the two first conductive plates are provided with elastic structures capable of clamping the static contact portion 120, the middle of the two first conductive plates 1111 are connected with each other through a plug-in a plugging structure, and the first boss 1111 is installed in the middle of the two conductive plates 1111 is installed in the two easy and convenient and easy and convenient, and easy to install, and convenient to install, and 11 can be installed in the first boss and 11.

In this embodiment, the static contact assembly includes a conductive plate disposed in the assembly slot 1012, one end of the conductive plate is used for connecting wires and matching with a wire connection slot disposed on the side wall of the housing 10, the edge of the plate surface of the conductive plate far away from the wire connection slot protrudes outwards to form a 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 parallel to the first conductive plates 1121, and can be inserted between the two first conductive plates 1121 as the movable contact portion 112 for elastic contact, that is, elastic clamping. 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 shown in fig. 13, the conductive plate of the present embodiment is a third conductive plate 122 in a straight shape, the middle portion of the third conductive plate 122 is bent, so that two 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 lead end 1221 to extend out of the base from the wiring slot, in the figure, the lead slot 1013 surrounds the outer side of the lead end 1221, the other end side of the third conductive plate 122 extends laterally and obliquely outwards to form a V-shaped static contact portion 120, one end of the third conductive plate 122 connected with the static contact portion 120 is located in the same plane with the static contact portion 120, and the static contact portion 120 is matched with the mounting slot 1104. In this embodiment, the wiring assembly 13 is not provided, and the third conductive plate 122 is connected to the lead end 1221, and the lead end 1221 may be soldered to an external circuit board or plugged into an external electrical device.

Each arc extinguishing groove 1017 is provided with an arc extinguishing chamber 14, a pair of arc extinguishing chambers 14 are arranged along the circumferential direction of the movable contact assembly 11, the arc extinguishing chambers 14 are positioned between the static contact part 120 and the movable contact part 112 when the movable contact assembly is positioned at the opening position, the two arc extinguishing chambers 14 form a rotation symmetrical structure relative to the movable contact assembly 11, an arc generated by breaking of a contact system is extinguished by the arc extinguishing chambers 14, high-temperature gas of the arc extinguishing chambers 14 flows through the assembly grooves 1012 through the vent holes 10172 and then is discharged from the wiring grooves, and further, as shown in fig. 6, in the embodiment, one end of the arc extinguishing groove 1017 opposite to the vent holes 10172 is closed by an arc isolating rib 10171, so that the arc isolating rib 10171 is used for preventing the high-temperature gas of the arc extinguishing chambers 14 from burning the movable contact assembly 11 at 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 contact unit comprises a base and a contact system, wherein the contact system comprises a moving contact assembly (11) and a pair of fixed contact assemblies, and the moving contact assembly (11) is rotationally assembled in the middle of an assembly cavity of the base, and is characterized in that: a pair of assembly grooves (1012) are formed in the assembly cavities on two sides of the moving contact assembly (11), the pair of assembly grooves (1012) are respectively correspondingly communicated with a pair of wire grooves on the same side of the base, a pair of static contact assemblies in the assembly cavities are respectively and limitedly placed in the pair of assembly grooves, one ends of the pair of static contact assemblies serve as pin ends (1221) which extend out of the base from the wiring grooves, and the pin ends (1221) are welded with an external circuit board or are spliced with an external electrical appliance.

2. The contact unit according to claim 1, wherein: and a mutually matched packaging structure is arranged between two adjacent bases which are arranged in a stacked mode, the packaging structure comprises a packaging wall (1014) and a packaging groove (1015) which are mutually spliced, the packaging wall (1014) is formed by extending part of the edge of the outer side wall of the base in a parallel and outwards protruding mode, and the packaging groove (1015) is formed by recessing part of the edge of the outer side wall of the base.

3. The contact unit according to claim 2, wherein: an encapsulation wall (1014) and/or an encapsulation groove (1015) are arranged around the outer side wall of each base, a guard plate (10141) is arranged on the edge of part of the encapsulation wall (1014) in a protruding mode, a matching groove (10151) matched with the guard plate (10141) is formed in the encapsulation 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.

4. The contact unit according to claim 1, wherein: the base protrusion facing away from the assembly cavity is provided with at least one pair of compression bosses (1018), the compression bosses (1018) being used to compress a stationary contact assembly placed in the assembly cavity of an adjacent base.

5. The contact unit according to claim 1, wherein: at least one arc extinguishing groove (1017) is arranged in the assembly cavity, and the arc extinguishing groove (1017) is arranged along the circumferential direction of the moving contact assembly (11) and is communicated with the assembly groove (1012).

6. The contact unit of claim 5, wherein: one of the arc extinguishing grooves (1017) and the two assembling grooves (1012) are positioned on the same side of the movable contact assembly (11) and share one side groove wall with one of the assembling grooves (1012).

7. The contact unit according to claim 1, wherein: the movable contact assembly (11) comprises an arc isolation part (110) and a movable contact bridge (111), wherein the arc isolation part (110) is in running fit with the base, a contact groove (1103) is formed in the radial outer side wall of the arc isolation part, an installation groove (1104) communicated with the contact groove (1103) is formed in the edge of the arc isolation part (110), and the installation groove (1104) penetrates through the contact groove (1103) along the axis direction parallel to the arc isolation part (110);

the static contact assembly comprises a third conductive plate (122), wherein the middle part of the third conductive plate (122) is bent, so that two ends of the third conductive plate (122) are respectively located on two parallel planes, one end of the third conductive plate (122) serves as a pin end (1221) to extend out of a base from a wiring groove (10121), the other end side of the third conductive plate (122) is laterally and obliquely extended outwards to form a V-shaped static contact part (120), and one end, connected with the static contact part (120), of the third conductive plate (122) is located on the same plane as the static contact part (120); the stationary contact (120) mates with a mounting slot (1104).

8. The contact unit according to claim 1, wherein: the edge of each wiring groove protrudes outwards to form a pin groove (1013) encircling the outer side of the pin end (1221).

9. The contact unit according to claim 1, wherein: the outer side wall of the base is also provided with a pair of positioning plates (10161), the pair of positioning plates (10161) are positioned between the pair of pin grooves (1013) of the same base, a fixed sub-groove (10162) is formed at the interval between the pair of positioning plates (10161), the fixed sub-grooves (10162) of two adjacent bases are correspondingly communicated to form a fixed groove, and at least one fixed boss (10163) for limiting is arranged in the fixed groove.

10. Disconnecting 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 1 to 9.