Mutual inductance mechanism and alternating current contactor

Abstract

The utility model discloses a mutual inductance mechanism and an alternating current contactor, and particularly relates to the technical field of electric power fittings, a housing, a permanent magnet winding coil and a plurality of conductor rods are arranged, the permanent magnet winding coil is wrapped in the housing by using a placing space enclosed by a first housing and a second housing, and the conductor rods are sequentially installed in each insulating hole, so that the permanent magnet winding coil is arranged in the housing. When the mutual inductor is used, the first insulation protrusions and the second insulation protrusions on the shell of the mutual inductor are matched, the risk that the mutual inductor is broken down due to the fact that electric gaps between electric conductors are arranged unreasonably can be avoided, meanwhile, the first insulation protrusions and the second insulation protrusions are provided with the same number of insulation holes, and therefore the mutual inductor can be prevented from being broken down. In this way, the conductor can be conveniently installed in the use process, the use portability is improved, and the consistency of products is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power accessories, and particularly relates to a mutual inductance mechanism and an AC contactor. Background Art

[0002] An AC contactor is an automatic switching electrical appliance for connecting or disconnecting the main circuit of a motor or load. It is an electrical appliance that uses electromagnetic force to close or open a switch. It is suitable for frequent operation, long-distance control of high-voltage circuits, and has the protection performance of low-voltage release.

[0003] The AC contactor often adopts three arc extinguishing methods: double-break electric arc extinguishing, longitudinal slit arc extinguishing, and grid arc extinguishing. It is used to eliminate the arc generated during the separation and combination of the moving and static contacts. Contactors with a capacity above 10A are all equipped with arc extinguishing devices. The AC contactor also has auxiliary components such as a reaction spring, a buffer spring, a contact pressure spring, a transmission mechanism, a base, and a terminal post.

[0004] When the mutual inductor on the existing AC contactor is in use, there are problems such as unreasonable setting of the insulation holes on the mutual inductor housing and unreasonable creepage distance between the conductors passing through the insulation holes, which poses a breakdown hazard. Summary of the Utility Model

[0005] The main purpose of the utility model is to propose a mutual inductance mechanism and an AC contactor, aiming to solve the technical problems that when the mutual inductor on the existing AC contactor is in use, the insulation holes set on the mutual inductor housing are unreasonable, and the creepage distance between the conductors passing through the insulation holes is unreasonable, resulting in a breakdown hazard.

[0006] To achieve the above object, a mutual inductance mechanism proposed by the utility model includes:

[0007] A housing, the housing includes a first housing and a second housing. The two sides of the first housing are respectively a first isolation side and a first installation side. The first installation side bulges away from the first isolation side to form a first insulation protrusion. A first installation groove is formed between the first insulation protrusion and the outer wall of the first housing. The two sides of the second housing are respectively a second isolation side and a second installation side. The second installation side bulges away from the second isolation side to form a second insulation protrusion. A second installation groove is formed between the second insulation protrusion and the outer wall of the second housing. The first installation side can be buckled on the second installation side so that the first installation groove and the second installation groove communicate with each other to form a placement space;

[0008] A plurality of first through holes penetrating in the direction from the first isolation side to the first installation side are arranged at intervals on the first insulating protrusion, and a plurality of second through holes penetrating in the direction from the second isolation side to the second installation side are arranged at intervals on the second insulating protrusion. The number of the first through holes is the same as that of the second through holes and they are in one-to-one correspondence and communication, and each of the first through holes and the corresponding second through hole communicate to form an insulating hole;

[0009] A permanent magnet winding coil, which is placed in the placement space; and,

[0010] A plurality of conductor bars, the number of which is the same as that of the insulating holes and they penetrate one by one.

[0011] In an embodiment, a first insulating convex ring surrounding the outer periphery of the first insulating protrusion is further arranged on the first installation side. The first insulating convex ring divides the first installation groove into a first placement cavity and a first accommodation cavity which are arranged at intervals. A plurality of card wire grooves which are arranged at intervals and communicate the first placement cavity with the first accommodation cavity are formed on the first insulating convex ring. A wire passing hole is further formed at a position of the first housing corresponding to the first accommodation cavity;

[0012] A second insulating convex ring surrounding the outer periphery of the second insulating protrusion is further arranged on the second installation side. The second insulating convex ring divides the second installation groove into a second placement cavity and a second accommodation cavity which are arranged at intervals;

[0013] The first installation side and the second installation side are buckled so that the first placement cavity and the second placement cavity enclose and communicate to form the placement space, and the first accommodation cavity and the second accommodation cavity enclose and communicate to form an accommodation space. The lead of the permanent magnet winding coil can pass through the card wire groove and extend into the accommodation space.

[0014] In an embodiment, a plurality of first partition plates are arranged in the first accommodation cavity. The plurality of first partition plates divide the first accommodation cavity into card wire grooves which are the same in number as the card wire grooves and are in one-to-one correspondence and communication. Each of the card wire grooves communicates with one of the wire passing holes.

[0015] In an embodiment, a second partition plate is further arranged in each of the card wire grooves. The second partition plate is arranged between the card wire groove and the wire passing hole, and a wire passing groove is further arranged on the second partition plate.

[0016] In an embodiment, a buckle is formed by the outer shell wall of the first housing extending in a direction away from the first isolation side. A card slot is formed at a position of the outer shell wall of the second housing corresponding to the buckle. The buckle and the card slot are engaged with each other so that the first housing is buckled to the second housing.

[0017] In one embodiment, the number of the buckles is multiple, and the multiple buckles are circumferentially and spacedly distributed along the first installation side. The outer shell wall of the second housing is formed with the clamping grooves which are consistent with the number of the buckles and are arranged in one-to-one correspondence.

[0018] In one embodiment, the first isolation side is recessed towards the direction of the placement space to form a first isolation cavity. A first isolation cover is placed in the first isolation cavity, and a first isolation lid is covered on the first isolation cavity.

[0019] In one embodiment, the second isolation side is recessed towards the direction close to the placement space to form a second isolation cavity. A second isolation cover is placed in the second isolation cavity, and a second isolation lid is covered on the second isolation cavity.

[0020] In one embodiment, the first installation side is recessed towards the direction of the first isolation side to form a sinking groove. The sinking groove surrounds the outer periphery of the first installation groove and is communicated with the first installation groove; the second installation side protrudes towards the direction away from the second isolation side to form an insulating boss which is inserted and matched with the sinking groove.

[0021] Based on the same technical concept, in the second aspect, the present invention further provides an AC contactor which applies the mutual inductance mechanism described in the first aspect.

[0022] The technical solution of the present invention forms a placement space by arranging the outer shell, the permanent magnet winding coil and multiple conductor bars, and wraps the permanent magnet winding coil in the outer shell by using the placement space formed by enclosing the first housing and the second housing. The conductor bars are sequentially installed in each insulating hole. When in use, by using the cooperation of the first insulating protrusion and the second insulating protrusion on the outer shell of the mutual inductor, the risk of breakdown of the mutual inductor caused by unreasonable electrical clearance between the conductors can be avoided. At the same time, insulating holes with the same number are arranged on the first insulating protrusion and the second insulating protrusion, so that the conductor can be conveniently installed when the present invention is in use, the use convenience degree is improved, and the product consistency is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0024] Figure 1 It is a schematic structural diagram of an embodiment of the mutual inductance mechanism provided by the present invention;

[0025] Figure 2Schematic plan view of the mutual inductance mechanism provided by the present utility model;

[0026] Figure 3 is Figure 2 Schematic cross-sectional structure view of A-A exemplified in;

[0027] Figure 4 Exploded structure view of one perspective of the mutual inductance mechanism exemplified by the present utility model;

[0028] Figure 5 Exploded structure view of another perspective of the mutual inductance mechanism exemplified by the present utility model.

[0029] Explanation of reference numerals in the drawings:

[0030] 100, outer shell; 110, first housing; 120, second housing; 111, first isolation side; 112, first installation side; 113, first insulating projection; 114, first installation groove; 121, second isolation side; 122, second installation side; 123, second insulating projection; 124, second installation groove; 115, first through hole; 125, second through hole; 130, first insulating collar; 140, first placement cavity; 150, first accommodation cavity; 160, wire clamping groove; 170, wire threading hole; 131, second insulating collar; 180, second placement cavity; 190, second accommodation cavity; 141, first partition; 142, wire releasing groove; 191, second partition; 192, wire threading groove; 116, buckle; 126, card slot; 181, first isolation cavity; 182, first isolation cover; 183, first isolation lid; 184, second isolation cavity; 185, second isolation cover; 186, second isolation lid; 187, counterbore; 188, insulating boss; 200, permanent magnet winding coil; 300, conductor bar.

[0031] The realization, functional features and advantages of the object of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0033] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0034] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0035] Please refer to Figures 1 to 5, in an embodiment of the present utility model, the mutual induction mechanism includes a housing 100, a permanent magnet winding coil 200, and multiple conductor rods 300. The housing 100 includes a first housing body 110 and a second housing body 120. The two sides of the first housing body 110 are respectively a first isolation side 111 and a first installation side 112. The first installation side 112 bulges away from the first isolation side 111 to form a first insulating protrusion 113. A first installation groove 114 is formed between the first insulating protrusion 113 and the wall of the housing 100 of the first housing body 110. The two sides of the second housing body 120 are respectively a second isolation side 121 and a second installation side 122. The second installation side 122 bulges away from the second isolation side 121 to form a second insulating protrusion 123. A second installation groove 124 is formed between the second insulating protrusion 123 and the wall of the housing 100 of the second housing body 120. The first installation side 112 can be buckled to the second installation side 122 so that the first installation groove 114 and the second installation groove 124 communicate with each other to form a placement space. Multiple first through holes 115 are arranged at intervals on the first insulating protrusion 113 and penetrate through in the direction from the first isolation side 111 to the first installation side 112. Multiple second through holes 125 are arranged at intervals on the second insulating protrusion 123 and penetrate through in the direction from the second isolation side 121 to the second installation side 122. The number of the first through holes 115 is the same as that of the second through holes 125 and they correspond and communicate with each other one by one. Each first through hole 115 and the second through hole 125 communicating with it form an insulating hole. The permanent magnet winding coil 200 is placed in the placement space, and the number of the conductor rods 300 is the same as that of the insulating holes and they penetrate through one by one.

[0036] It should be specifically and clearly stated that the housing 100 exemplified in this embodiment is a structure made of insulating materials. In this embodiment, only its application is carried out, and no improvement or design is made to it. Therefore, it will not be elaborated here one by one.

[0037] In this embodiment, by arranging the housing 100, the permanent magnet winding coil 200, and multiple conductor rods 300, the permanent magnet winding coil 200 is covered in the housing 100 by using the placement space formed by enclosing the first housing body 110 and the second housing body 120, and the conductor rods 300 are sequentially installed in each insulating hole. When in use, by using the cooperation of the first insulating protrusion and the second insulating protrusion on the mutual inductor housing, the risk of breakdown of the mutual inductor caused by unreasonable electrical clearances between conductors can be avoided. At the same time, by arranging insulating holes with the same number on the first insulating protrusion and the second insulating protrusion, it is convenient to install conductors when the present utility model is in use, improving the use convenience and ensuring the product consistency.

[0038] In some specific embodiments, a first insulating collar 130 is further provided on the first mounting side 112 and is disposed around the outer periphery of the first insulating projection 113. The first insulating collar 130 divides the first mounting groove into a first placement cavity 140 and a first receiving cavity 150 that are spaced apart from each other. A plurality of card wire grooves 160 that are spaced apart from each other and connect the first placement cavity 140 and the first receiving cavity 150 are formed on the first insulating collar 130. A wire passing hole 170 is further formed at a position of the first housing 110 corresponding to the first receiving cavity 150. A second insulating collar 131 is further provided on the second mounting side 122 and is disposed around the outer periphery of the second insulating projection 123. The second insulating collar 131 divides the second mounting groove into a second placement cavity 180 and a second receiving cavity 190 that are spaced apart from each other. The first mounting side 112 and the second mounting side 122 are buckled so that the first placement cavity 140 and the second placement cavity 180 enclose and communicate to form a placement space, and the first receiving cavity 150 and the second receiving cavity 190 enclose and communicate to form a receiving space. The lead ends of the permanent magnet winding coils 200 can pass through the card wire grooves 160 and extend into the receiving space.

[0039] In this embodiment, by providing the first insulating collar 130 to divide the first mounting groove into the first placement cavity 140 and the first receiving cavity 150 that are spaced apart, and at the same time by providing the second insulating collar 131 to divide the second mounting groove into the second placement cavity 180 and the second receiving cavity 190 that are spaced apart, the safety of the entire current transformer housing 100 structure during use can be ensured when the present utility model is in use.

[0040] It should be specifically and clearly stated that, in this embodiment, by providing the second insulating collar 131 and the first insulating collar 130, the defect that potential safety hazards may be caused by creepage or weak electricity between various structures during use of the present utility model can be avoided, effectively ensuring the safe use of the current transformer.

[0041] In some specific embodiments, a plurality of first partition plates 141 are provided in the first receiving cavity 150. The plurality of first partition plates 141 divide the first receiving cavity 150 into card wire grooves 160 that are the same in number as and correspond to the card wire grooves 160 one by one, and each card wire groove 160 communicates with a wire passing hole 170.

[0042] In this embodiment, by providing a plurality of first partition plates 141 in the first receiving cavity 150, the partition plates divide the first receiving cavity 150 into wire laying grooves 142 that are the same in number as and correspond to the card wire grooves 160 one by one, and each wire laying groove 142 communicates with a wire passing hole 170. Furthermore, when the present utility model is in use, the partition plates provided can be used to avoid problems such as creepage or leakage between various wires and lead ends, effectively ensuring the safe operation of the overall structure.

[0043] In some preferred embodiments, a second partition 191 is further disposed in each card slot 160. The second partition 191 is disposed between the card slot 160 and the wire passing hole 170, and a wire passing slot 192 is further disposed on the second partition 191.

[0044] In the embodiment, by disposing the second partition 191 in each card slot 160 and opening the wire passing slot 192 on the second partition 191, when the present utility model is in use, the external wire passing through the wire passing hole 170 into the wire releasing slot 142 can be fixed by the wire passing slot 192 and electrically connected to the lead of the permanent magnet winding coil 200 in the corresponding wire releasing slot 142. Furthermore, the present utility model can ensure the stability when the permanent magnet winding coil 200 is connected to the wire.

[0045] In one embodiment, a buckle 116 is formed by the outer shell 100 wall of the first housing 110 extending away from the first isolation side 111. A card slot 126 is formed at the position of the outer shell 100 wall of the second housing 120 corresponding to the buckle 116. The buckle 116 and the card slot 126 are snap-fitted to make the first housing 110 snap onto the second housing 120.

[0046] In this embodiment, by disposing the buckle 116 on the first housing 110 and the card slot 126 on the second housing 120, the buckle 116 can be snap-fitted with the card slot 126. Furthermore, when the present utility model is in use, the first housing 110 and the second housing 120 can be quickly snap-fitted, and at the same time, the stability after the first housing 110 and the second housing 120 are snap-fitted can be ensured.

[0047] In one embodiment, the number of buckles 116 is multiple, and the multiple buckles 116 are circumferentially spaced along the first mounting side 112. Card slots 126 which are the same in number as the buckles 116 and are arranged in one-to-one correspondence are formed on the outer shell 100 wall of the second housing 120.

[0048] In this embodiment, by setting the number of buckles 116 to be multiple and the number of card slots 126 to be multiple, when the present utility model is in use, the cooperation of the multiple buckles 116 and the card slots 126 which are the same in number as the buckles 116 and are arranged in one-to-one correspondence can be utilized to improve the snap-fitting stability of the first housing 110 and the second housing 120, effectively ensuring the safe use of the current transformer.

[0049] It should be specifically and clearly noted that, in this embodiment, a card hole penetrating through the first insulating protrusion 113 along the direction from the first isolation side 111 to the first mounting side 112 is further disposed on the exemplary first housing 110. The exemplary card hole should be capable of being snap-fitted with an external structure to achieve the purpose of mounting the current transformer housing 100 on other structures.

[0050] In one embodiment, the first isolation side 111 is recessed toward the direction of the placement space to form a first isolation cavity 181. A first isolation cover 182 is placed in the first isolation cavity 181, and a first isolation lid 183 is provided to cover the first isolation cavity 181.

[0051] In this embodiment, by providing the first isolation member and the first isolation lid 183, and at the same time recessing the first isolation side 111 to form a first isolation groove for placing the first isolation member, the isolation effect of the first isolation side 111 is ensured, effectively improving the safety of the current transformer housing 100.

[0052] In one embodiment, the second isolation side 121 is recessed toward the direction close to the placement space to form a second isolation cavity 184. A second isolation cover 185 is placed in the second isolation cavity 184, and a second isolation lid 186 is provided to cover the second isolation cavity 184.

[0053] In this embodiment, by providing the second isolation member and the second isolation lid 186, and at the same time recessing the second isolation side 121 to form a second isolation groove for placing the second isolation member, the isolation effect of the second isolation side 121 is ensured, effectively improving the safety of the current transformer housing 100.

[0054] In one embodiment, the first installation side 112 is recessed toward the first isolation side 111 to form a sink 187. The sink 187 surrounds the outer periphery of the first installation groove, and the sink 187 communicates with the first installation groove; the second installation side 122 protrudes away from the second isolation side 121 to form an insulating boss 188 that is inserted and mated with the sink 187.

[0055] In this embodiment, by recessing the first installation side 112 toward the first isolation side 111 to form a sink 187, and at the same time making the second installation side 122 protrude away from the second isolation side 121 to form an insulating boss 188 that is inserted and mated with the sink 187, it is further ensured that when the first installation side 112 and the second installation side 122 of the present utility model are buckled, the insulating boss 188 can extend into the sink 187 to enhance the insulation function of the current transformer housing 100.

[0056] Based on the same technical concept, in a second aspect, the present utility model further proposes an AC contactor that applies the mutual inductance mechanism of the first aspect.

[0057] The AC contactor provided by the embodiment of the present application adopts the mutual inductance mechanism in the above embodiment, which can solve the technical problem that when the mutual inductor on the AC contactor is in use, the coil winding on the permanent magnet leaks out, affecting the safe use of the entire mutual inductor. Compared with the prior art, the beneficial effects of the AC contactor provided by the embodiment of the present application are the same as those of the mutual inductance mechanism provided by the above embodiment, and the other technical features in the mutual inductance mechanism are the same as the features disclosed in the above embodiment, which will not be elaborated here.

[0058] The above is only an exemplary embodiment of the present invention, and thus does not limit the patent scope of the present invention. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A mutual inductance mechanism, characterized in that, Comprising: A housing, the housing includes a first housing body and a second housing body. Two sides of the first housing body are respectively a first isolation side and a first installation side. The first installation side bulges away from the first isolation side to form a first insulating protrusion. A first installation groove is formed between the first insulating protrusion and the outer wall of the first housing body. Two sides of the second housing body are respectively a second isolation side and a second installation side. The second installation side bulges away from the second isolation side to form a second insulating protrusion. A second installation groove is formed between the second insulating protrusion and the outer wall of the second housing body. The first installation side can be buckled to the second installation side so that the first installation groove and the second installation groove communicate with each other to form a placement space; A plurality of first through holes are arranged at intervals on the first insulating protrusion and penetrate along the direction from the first isolation side to the first installation side. A plurality of second through holes are arranged at intervals on the second insulating protrusion and penetrate along the direction from the second isolation side to the second installation side. The number of the first through holes is the same as that of the second through holes and they are in one-to-one correspondence and communicate with each other. Each of the first through holes and the corresponding second through hole communicate to form an insulating hole; A permanent magnet winding coil, the permanent magnet winding coil is placed in the placement space; and, A plurality of conductor bars, the number of the conductor bars is the same as that of the insulating holes and they penetrate one by one.

2. The mutual inductance mechanism according to claim 1, characterized in that, The first installation side is further provided with a first insulating convex ring surrounding the outer periphery of the first insulating protrusion. The first insulating convex ring divides the first installation groove into a first placement cavity and a first accommodation cavity which are arranged at intervals. A plurality of card wire grooves which are arranged at intervals and communicate the first placement cavity and the first accommodation cavity are formed on the first insulating convex ring. A wire passing hole is further formed at the position of the first housing body corresponding to the first accommodation cavity; The second installation side is further provided with a second insulating convex ring surrounding the outer periphery of the second insulating protrusion. The second insulating convex ring divides the second installation groove into a second placement cavity and a second accommodation cavity which are arranged at intervals; The first installation side and the second installation side are buckled so that the first placement cavity and the second placement cavity enclose and communicate to form the placement space, and the first accommodation cavity and the second accommodation cavity enclose and communicate to form an accommodation space. The lead of the permanent magnet winding coil can pass through the card wire groove and extend into the accommodation space.

3. The mutual inductance mechanism according to claim 2, characterized in that, A plurality of first partition plates are arranged in the first accommodation cavity. The plurality of first partition plates divide the first accommodation cavity into wire releasing grooves which are the same as the number of the card wire grooves and are in one-to-one correspondence and communicate with each other. Each wire releasing groove communicates with one of the wire passing holes.

4. The mutual inductance mechanism according to claim 3, wherein A second partition plate is further arranged in each wire releasing groove. The second partition plate is arranged between the card wire groove and the wire passing hole, and a wire passing groove is further arranged on the second partition plate.

5. The mutual inductance mechanism according to any one of claims 1 to 4, characterized in that, The outer wall of the first housing body extends away from the first isolation side to form a buckle. A clamping groove is formed at the position of the outer wall of the second housing body corresponding to the buckle. The buckle and the clamping groove are clamped and matched so that the first housing body is buckled to the second housing body.

6. The mutual inductance mechanism according to claim 5, characterized in that The number of the buckles is multiple, and the multiple buckles are distributed at intervals along the circumferential direction of the first installation side. The outer shell wall of the second housing is formed with the card slots that are consistent with the number of the buckles and are arranged in one-to-one correspondence.

7. The mutual inductance mechanism according to any one of claims 1 to 4, characterized in that, The first isolation side is recessed towards the direction of the placement space to form a first isolation cavity. A first isolation cover is placed in the first isolation cavity, and a first isolation lid is covered on the first isolation cavity.

8. The mutual inductance mechanism according to any one of claims 1 to 4, characterized in that The second isolation side is recessed towards the direction close to the placement space to form a second isolation cavity. A second isolation cover is placed in the second isolation cavity, and a second isolation lid is covered on the second isolation cavity.

9. The mutual inductance mechanism according to any one of claims 1 to 4, characterized in that, The first installation side is recessed towards the direction of the first isolation side to form a sinking groove. The sinking groove surrounds the outer periphery of the first installation groove, and the sinking groove is communicated with the first installation groove; the second installation side protrudes towards the direction away from the second isolation side to form an insulating boss that is inserted and matched with the sinking groove.

10. An AC contactor, characterized in that, Apply the mutual inductance mechanism according to any one of claims 1 to 9.

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