CN219017544U - Contact structure and contactor - Google Patents

Abstract

The utility model provides a contact structure and contactor relates to low voltage electrical apparatus technical field, the protection casing of auxiliary contact subassembly periphery is located to the cover in the utilization contact structure for auxiliary contact subassembly and main contact subassembly pass through the protection casing and realize the isolation of two, so, in long-term use, auxiliary contact subassembly just can shelter from a large amount of metal particles that adhere to in sealed cavity through the protection casing of cover at its outside, reduce or avoid the pollution that metal particles caused auxiliary contact subassembly in the protection casing inner chamber, from this, make to have better electrical insulation performance between auxiliary contact subassembly and the main contact subassembly, avoid the problem that the electrical insulation that both have not kept apart and lead to declines, thereby still have higher electrical insulation performance between long-term use.

Description

Contact structure and contactor

Technical Field

The application relates to the technical field of piezoelectric devices, in particular to a contact structure and a contactor.

Background

With the rapid development of economy, the living standard of people is rapidly improved, and higher requirements are placed on electricity safety. The contactor is a device capable of rapidly cutting off the AC and DC main circuits and frequently switching on and off the high-current control circuit, and the contactor not only can switch on and off the circuit, but also has the low-voltage release protection function. The contactor has large control capacity, is suitable for frequent operation and remote control, and is one of important elements in an automatic control system.

At present, a large number of applications of the contactor are carried out in the fields of new energy automobiles, charging piles and energy storage, so that the product volume of the contactor needs to be as small as possible to meet the use requirement, the reliability is high, the contactor is broken and has no leakage of electric arcs, the contactor is generally placed in a sealed cavity, and a large number of customers need the contactor to carry a group of auxiliary contacts for monitoring the on-off state of a main contact, so that the auxiliary contact and the main contact are placed in the sealed cavity together. In use, the main contact generates an electric arc when electrified breaking, a large amount of metal particles are adhered to the inside of the sealed cavity after long-term use, and the auxiliary contact is extremely easy to pollute, so that the electrical insulation performance between high voltage and low voltage is reduced.

Disclosure of Invention

The purpose of the present application is to provide a contact structure and a contactor to solve the problem that the electrical insulation performance between high and low voltage is reduced due to the fact that the existing auxiliary contact is easily polluted.

In order to achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:

in one aspect of the embodiments of the present application, a contact structure is provided, including a contact housing, and a main contact assembly and an auxiliary contact assembly disposed in the contact housing, the main contact assembly and the auxiliary contact assembly are linked to be synchronously opened and closed, and a protective cover sleeved on the periphery of the auxiliary contact assembly is further disposed in the contact housing, so that the auxiliary contact assembly is isolated from the main contact assembly through the protective cover.

Optionally, the main contact assembly includes main stationary contact and cooperation main stationary contact and closes the initiative contact assembly of separating brake, and auxiliary contact assembly includes auxiliary stationary contact and cooperation auxiliary stationary contact and closes the auxiliary moving contact assembly of separating brake, and initiative contact assembly and auxiliary moving contact assembly linkage set up, and auxiliary stationary contact and auxiliary moving contact assembly all are located the inner chamber of protection casing.

Optionally, the active contact assembly is slidably disposed on the contact housing, the auxiliary moving contact assembly is fixedly connected with the active contact assembly, the protection cover has a first opening, and the protection cover is slidably sleeved on the periphery of the auxiliary moving contact assembly through the first opening.

Optionally, the auxiliary moving contact assembly includes auxiliary stand and auxiliary moving contact, and auxiliary stand embedding protection casing's first opening and with protection casing sliding fit, auxiliary moving contact and initiative contact assembly are fixed in the opposite both sides of auxiliary stand respectively, and auxiliary moving contact is towards the inner chamber of protection casing.

Optionally, the active contact assembly includes a main support fixedly arranged on one side of the auxiliary support, which is away from the auxiliary moving contact, and an active contact arranged on the main support, wherein the active contact and the auxiliary moving contact are both bar-shaped pieces, and the axial directions of the active contact and the auxiliary moving contact are intersected.

Optionally, the first opening is located the diapire of protection casing, still is provided with the logical groove with first opening intercommunication on the protection casing and the adjacent opposite both ends of diapire, logical groove and the relative both ends sliding fit of initiative contact.

Optionally, the contact structure further includes a bottom plate located at one side of the protection cover and corresponding to the first opening, the protection cover is fixedly connected to the bottom plate through the supporting leg, the bottom plate has a second opening overlapping with the first opening at least in part in projection, so that the protection cover is sleeved on the periphery of the auxiliary contact assembly through the second opening and the first opening in sequence.

Optionally, an auxiliary leading-out part is further arranged on the auxiliary static contact, and the auxiliary static contact sequentially penetrates through the protective cover and the contact shell through the auxiliary leading-out part and extends to the outside of the contact shell.

Optionally, a separation plate is further arranged on the inner wall of the contact shell, and the separation plate is located between the auxiliary leading-out part and the main fixed contact.

Optionally, the contact housing includes a housing body having a third opening and a cover plate covering the third opening, where the cover plate is a magnetic conductive member.

Optionally, an annular connecting sheet is arranged at the periphery of the third opening of the shell body, and the plate surface of the cover plate close to one side of the shell body is attached to the annular connecting sheet.

In another aspect of the embodiments of the present application, a contactor is provided that includes any of the contact structures described above.

The beneficial effects of this application include:

the application provides a contact structure and contactor, the protection casing of auxiliary contact subassembly periphery is located to the cover in utilizing the contact structure for auxiliary contact subassembly and main contact subassembly pass through the protection casing and realize the isolation of two, so, in long-term use, auxiliary contact subassembly just can shelter from a large amount of metal particles that attach in sealed cavity through the protection casing of cover outside it, reduce or avoid the pollution that metal particles caused auxiliary contact subassembly in the protection casing inner chamber, from this, make to have better electrical insulation performance between auxiliary contact subassembly and the main contact subassembly, avoid the problem that the electrical insulation that the two does not have the isolation to lead to declines, thereby guarantee that high electrical insulation performance still has higher between high low pressure in long-term use.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is an exploded view of a contact structure according to an embodiment of the present application;

fig. 2 is a schematic structural view of a contact housing according to an embodiment of the present application;

fig. 3 is a cross-sectional view of a contact housing according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a protective cover according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of an auxiliary moving contact assembly according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a contact structure according to an embodiment of the present application.

Icon: 100-contact housings; 110-a housing body; 111-dividing plates; 112-isolating the cavity; 113-subchambers; 120-cover plate; 130-annular connecting pieces; 210-an active contact assembly; 211-a main support; 212-active contacts; 221-a main lead-out portion; 222-main stationary contact; 310-auxiliary moving contact assembly; 311-auxiliary brackets; 312-convex; 313-auxiliary stent body; 314-auxiliary moving contact; 321-auxiliary extraction parts; 322-auxiliary fixed contact; 330-a protective cover; 331-a through hole; 332-a bottom plate; 333-legs; 334-a second opening; 335-through grooves; 400-driving member.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. It should be noted that, in the case of no conflict, the features of the embodiments of the present application may be combined with each other, and the combined embodiments still fall within the protection scope of the present application.

In the description of the present application, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are directions or positional relationships based on those shown in the drawings, or those conventionally put in use in the application are merely for convenience of description and simplicity of description, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

In an aspect of the embodiments of the present application, as shown in fig. 1 and 6, a contact structure is provided, including a contact housing 100, a main contact assembly and an auxiliary contact assembly, where the contact housing 100 has a sealed chamber, and the main contact assembly and the auxiliary contact assembly are uniformly distributed in the sealed chamber, so that an electric arc occurring in a contact breaking process only exists in the sealed chamber, avoiding leakage of the electric arc, and meeting requirements for high reliability when the contact structure is used in a contactor.

The main contact assembly and the auxiliary contact assembly are arranged in a linkage manner, so that the main contact assembly and the auxiliary contact assembly keep synchronous switching-on or synchronous switching-off, and the switching-on state or switching-off state of the main contact assembly can be monitored through switching-on or switching-off of the auxiliary contact assembly.

Referring to fig. 1 and 6 in combination, a protective cover 330 is further disposed in the sealed cavity of the contact housing 100, and the protective cover 330 is sleeved on the outer periphery of the auxiliary contact assembly, that is, the auxiliary contact assembly is located in the inner cavity of the protective cover 330, and the main contact assembly is still located in the sealed cavity outside the inner cavity of the protective cover 330, so that the auxiliary contact assembly and the main contact assembly are isolated through the protective cover 330.

It should be understood that the protection cover 330 in the present application should have good insulation performance, for example, the protection cover 330 is made of insulating resin, insulating silica gel, or the like.

Alternatively, as shown in fig. 1 and 6, the main contact assembly includes a main fixed contact 222 and a main contact assembly 210 that cooperates with the main fixed contact 222 to close and open, where the main fixed contact 222 is fixedly disposed on the contact housing 100, and the main fixed contact 222 is located on a movement path of the main contact 212, so that closing is completed when the main contact assembly 210 contacts the main fixed contact 222, and opening is completed after the main contact assembly 210 is separated from the main fixed contact 222. As shown in fig. 1 and 6, the contact structure further includes a driving member 400, where one end of the driving member 400 extends into the sealed cavity of the contact housing 100 through the contact housing 100 and is in driving connection with the active contact assembly 210, so that when both the driving member 400 and the active contact assembly 210 are located at the opening position and need to be closed, the driving member 400 is driven by an external force, so that the driving member 400 drives the active contact assembly 210 to move relative to the contact housing 100 and contact with the main fixed contact 222 to be closed; when the opening is required, the active contact assembly 210 and the driving member 400 can be reset to the opening position, wherein the reset force for driving the active contact assembly 210 and the driving member 400 to reset can be provided by the elastic member in the active contact assembly 210.

As shown in fig. 1 and 5, the auxiliary contact assembly includes an auxiliary fixed contact 322 and an auxiliary moving contact assembly 310, wherein the auxiliary moving contact assembly 310 is located in an inner cavity of the protective cover 330 and can move in the inner cavity of the protective cover 330, and the auxiliary fixed contact 322 can be fixedly arranged on the protective cover 330 and located on a moving path of the auxiliary moving contact assembly 310, so that switching-on is completed when the auxiliary moving contact assembly 310 contacts with the auxiliary fixed contact 322, and switching-off is completed after the auxiliary moving contact assembly 310 is separated from the auxiliary fixed contact 322.

In order to realize synchronous switching on or off of the main contact assembly and the auxiliary contact assembly, the main contact assembly 210 and the auxiliary contact assembly 310 can be arranged in a linkage manner, that is, when the main contact assembly 210 moves, the auxiliary contact assembly 310 is synchronously driven to move, so that switching on or off synchronism of the main contact assembly and the auxiliary contact assembly is realized.

Optionally, as shown in fig. 1 and fig. 6, the active contact assembly 210 is slidably disposed in the contact housing 100 in cooperation with the driving member 400, so that in order to reduce components and improve the synchronicity of the movement of the active contact assembly 210 and the auxiliary moving contact assembly 310, the auxiliary moving contact assembly 310 may be fixedly connected with the active contact assembly 210, that is, when the active contact assembly 210 slides relative to the contact housing 100, the auxiliary moving contact assembly 310 correspondingly slides synchronously.

In order to facilitate the movement of the auxiliary moving contact assembly 310 in the inner cavity of the protective cover 330, a first opening may be formed in the protective cover 330, and the protective cover 330 is slidably sleeved on the outer periphery of the auxiliary moving contact assembly 310 through the first opening, so that the auxiliary moving contact assembly 310 slides relatively to the protective cover 330 through the first opening when following the synchronous sliding of the active contact assembly 210.

Optionally, as shown in fig. 4, the contact structure further includes a bottom plate 332, and the protective cover 330 is fixedly connected to the bottom plate 332 by two legs 333, so that the bottom plate 332 is located on one side of the protective cover 330, and the bottom plate 332 is opposite to the first opening of the bottom wall of the protective cover 330, so that, after the assembly, the bottom plate 332 may be used to be attached to a side wall (the cover plate 120 of the subsequent embodiment) of the contact shell 100, so as to provide stable support for the protective cover 330. Meanwhile, in order to facilitate the auxiliary moving contact assembly 310 to extend into the inner cavity of the protective cover 330, a second opening 334 may be further formed on the bottom plate 332, and the orthographic projection of the second opening 334 and the first opening on the bottom wall of the protective cover 330 in the axial direction of the first opening at least has a partial overlapping area, so that the auxiliary moving contact assembly 310 can be conveniently correspondingly penetrated through the second opening 334 and then extend into the inner cavity of the protective cover 330 through the first opening.

Optionally, as shown in fig. 5 and 6, the auxiliary moving contact assembly 310 includes an auxiliary bracket 311 and an auxiliary moving contact 314, where the auxiliary bracket 311 and the auxiliary moving contact 314 are both located in the inner cavity of the protection cover 330, and the auxiliary bracket 311 is located at the first opening of the protection cover 330 and matches the shape of the auxiliary bracket 311 with the first opening, so that the first opening of the protection cover 330 can be plugged by using the auxiliary bracket 311 (it should be understood that the plugging herein allows a certain gap between the auxiliary bracket 311 and the first opening, thereby reducing friction and abrasion between the auxiliary bracket 311 and the inner wall of the protection cover 330), so as to improve the isolation between the inner cavity of the protection cover 330 and the sealing chamber outside the protection cover 330, and thereby reduce the pollution of the auxiliary moving contact 314 in the protection cover 330 by metal particles attached in the sealing chamber through the first opening as much as possible.

In order to improve the isolation between the auxiliary moving contact 314 and the active contact assembly 210, as shown in fig. 1 and 5, the auxiliary moving contact 314 and the active contact assembly 210 may be respectively disposed on two opposite sides of the auxiliary support 311, for example, as shown in fig. 1, the auxiliary moving contact 314 is fixedly disposed above the auxiliary support 311, the active contact assembly 210 is fixedly disposed below the auxiliary support 311, as shown in fig. 6, the auxiliary moving contact 314 is formed by matching the auxiliary support 311 with the inner wall of the protective cover 330, and the active contact 212 of the active contact assembly 210 is disposed outside the protective cover 330, thereby improving the insulation of the active contact 212 in the auxiliary moving contact 314 and the active contact assembly 210. The auxiliary bracket 311 is made of insulating resin, insulating silica gel, etc.

In some embodiments, as shown in fig. 5 and 6, the auxiliary support 311 includes an auxiliary support body 313 and a protrusion 312 located on the auxiliary support body 313, the protrusion 312 and the active contact assembly 210 are located on opposite sides of the auxiliary support body 313, respectively, and the auxiliary moving contact 314 is fixedly disposed on the protrusion 312, thereby, the auxiliary moving contact 314 is lifted by the protrusion 312, so that a certain distance is formed between the auxiliary moving contact 314 and the auxiliary support body 313, and the distance between the auxiliary moving contact 314 and the active contact 212 in the active contact assembly 210 can be further increased, so that the insulation between the auxiliary moving contact 314 and the active contact assembly 210 is improved. As shown in fig. 5, the auxiliary moving contact 314 and the protrusion 312 of the auxiliary bracket 311 may be integrally formed by an injection molding process.

Alternatively, as shown in fig. 1 and 6, the active contact assembly 210 includes a main support 211 and an active contact 212, wherein the main support 211 is fixedly disposed below the auxiliary support 311, that is, the auxiliary support 311 is away from the side of the auxiliary moving contact 314, and the active contact 212 is disposed on the main support 211.

Optionally, as shown in fig. 2 and fig. 3, in order to facilitate the external connection of the auxiliary fixed contact 322 to a circuit, an auxiliary lead-out portion 321 is further provided on the auxiliary fixed contact 322, as shown in fig. 6, the auxiliary fixed contact 322 is located in the inner cavity of the protective cover 330, and the auxiliary fixed contact 322 sequentially penetrates through the protective cover 330 and the contact housing 100 through the auxiliary lead-out portion 321 and extends to the outside of the contact housing 100, thereby being capable of facilitating the connection of the auxiliary fixed contact 322 to an external circuit through the auxiliary lead-out portion 321. In order to facilitate assembly, the auxiliary fixed contact 322 may be fixedly disposed on the contact housing 100 through the auxiliary lead-out portion 321, and a through hole 331 is formed in the protective cover 330, and during assembly, the auxiliary fixed contact 322 fixed on the contact housing 100 may extend into the inner cavity of the protective cover 330 through the through hole 331 to complete assembly.

Similarly, in order to facilitate the external connection of the main static contact 222 to a load circuit, the main lead-out portion 221 may be disposed on the main static contact 222, so that the main static contact 222 extends to the outside of the contact housing 100 through the contact housing 100 by penetrating the main lead-out portion 221, and the main static contact 222 is connected to the load circuit outside by the main lead-out portion 221.

It should be understood that the auxiliary fixed contact 322 and the auxiliary lead-out portion 321 in the present application may be an integrally formed structure, and similarly, the main fixed contact 222 and the main lead-out portion 221 may be integrally formed structures.

Optionally, as described above, in order to facilitate connection of the auxiliary fixed contact 322 with an external circuit, an auxiliary lead-out portion 321 penetrating the protection cover 330 and the contact housing 100 is correspondingly provided, and in order to improve isolation between the auxiliary lead-out portion 321 and the main fixed contact 222, as shown in fig. 3, a partition plate 111 may be further provided on an inner wall of the contact housing 100, and the partition plate 111 may be located between the auxiliary lead-out portion 321 and the main fixed contact 222. As shown in fig. 6, after the assembly is completed, the partition 111 may be attached to the outer wall of the shield 330 or may have a small gap, and thus, the separation of the auxiliary lead 321 from the main stationary contact 222 may be further improved.

Alternatively, the active contact assembly 210 and the auxiliary contact assembly may be in a double-breakpoint structure, as shown in fig. 1, 5 and 6, where the active contact 212 and the auxiliary moving contact 314 are strip-shaped pieces, opposite ends of the active contact 212 are respectively corresponding to two spaced contacts on the active contact 212, and similarly, opposite ends of the auxiliary moving contact 314 are respectively corresponding to two spaced contacts on the auxiliary moving contact 314, as shown in fig. 2 and 3, two active fixed contacts 222 and two auxiliary fixed contacts 322 are disposed on the contact housing 100 (of course, each active fixed contact 222 may have the aforementioned active lead-out portion 221, and the auxiliary fixed contacts 322 are similar), where the two contacts on the active contact 212 are respectively corresponding to the two active fixed contacts 222 one by one, and the two contacts on the auxiliary moving contact 314 are also respectively corresponding to the two auxiliary fixed contacts 322 one by one, so that when in a closed state, the two contacts on the active contact 212 are respectively corresponding to the two active fixed contacts 222, and when in an open state, the two contacts on the active contact 212 are respectively corresponding to the two active fixed contacts 222 and the two auxiliary fixed contacts 322 are respectively corresponding to the two active fixed contacts 222 one by one.

As shown in fig. 1, the axial directions of the active contact 212 and the auxiliary moving contact 314 intersect, and correspondingly, the connecting line between the two main fixed contacts 222 and the connecting line between the two auxiliary fixed contacts 322 also intersect, so that when the active contact assembly 210 and the auxiliary moving contact assembly 310 are arranged, the space in different directions can be utilized, and the volume of the contact structure is effectively reduced on the basis of satisfying the electrical insulation isolation.

As shown in fig. 4, since the active contact 212 and the auxiliary moving contact 314 intersect in the axial direction, in order to facilitate the shield 330 to be smoothly sleeved on the outer periphery of the auxiliary contact assembly through the bottom plate 332, the second opening on the bottom plate 332 may be in a cross shape, so as to facilitate the active contact 212 and the auxiliary moving contact 314 intersecting in the axial direction to pass through. Meanwhile, the first opening is located at the bottom (bottom wall) of the protective cover 330, through grooves 335 are respectively formed in two opposite side walls of the protective cover 330, the through grooves 335 are not only communicated with the interior of the protective cover 330, but also communicated with the first opening, when the protective cover 330 is sleeved on the periphery of the auxiliary contact assembly, each through groove 335 is matched with one end of the active contact 212 correspondingly, and the active contact 212 is in sliding fit with the through grooves 335, so that the active contact 212 can slide in the through grooves 335 when the active contact 212 drives the auxiliary moving contact 314 to synchronously move, and the protective cover 330 can avoid the movement of the active contact 212 by utilizing the through grooves 335, so that interference between the protective cover 330 and the active contact 212 is avoided.

When the main contact assembly and the auxiliary contact assembly are both of the double-breakpoint structure, as shown in fig. 3, the separation plates 111 are two, and thus, the sealing chamber is divided into the sub-chambers 113 near the left and right sides and the isolation chamber 112 between the two separation plates 111 by the separation plates 111, as shown in fig. 6, the shape of the protection cover 330 can be matched with the shape of the isolation chamber 112 during assembly, and thus, the outer wall of the protection cover 330 can be matched with the two separation plates 111 to further improve the isolation degree of the auxiliary lead-out portion 321 and the main fixed contact 222.

Alternatively, as shown in fig. 1, the contact housing 100 includes a housing body 110 having a third opening and a cover plate 120 covering the third opening, whereby assembly can be facilitated, and the main contact assembly and the driving piece 400 are correspondingly disposed at the cover plate 120. In some embodiments, the cover 120 is a magnetically permeable member.

Optionally, as shown in fig. 1, fig. 2 and fig. 6, an annular connecting piece 130 is disposed at the periphery of the third opening of the housing body 110, and the housing body 110 is fixedly disposed on the cover plate 120 through the annular connecting piece 130, so as to seal the third opening by the cover plate 120, where a plate surface of the cover plate 120 close to one side of the housing body 110 and a surface of the annular connecting piece 130 close to one side of the cover plate 120 are attached, so that an attaching area of the housing body 110 and the cover plate 120 can be increased, and connection stability and tightness of the housing body and the cover plate 120 are improved.

In another aspect of the embodiments of the present application, a contactor is provided that includes any of the contact structures described above. The protective cover 330 of auxiliary contact assembly periphery is located to the cover in utilizing the contact structure for auxiliary contact assembly and main contact assembly pass through the protection casing 330 and realize the isolation of two, so, in long-term use, auxiliary contact assembly just can shelter from a large amount of metal particles that attach in sealed cavity through the protection casing 330 of cover at its outside, reduce or avoid the pollution that metal particles caused to auxiliary contact assembly in the protection casing 330 inner chamber, from this, make have better electrical insulation performance between auxiliary contact assembly and the main contact assembly, avoid the problem that the electrical insulation that the two do not have the isolation to lead to declines, thereby guarantee that high-low voltage interval still has higher electrical insulation performance in long-term use.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (10)

1. The utility model provides a contact structure, its characterized in that includes contact casing (100) and set up in main contact subassembly and auxiliary contact subassembly in contact casing (100), main contact subassembly with auxiliary contact subassembly linkage is in order to close the brake in step still be provided with in contact casing (100) cover and locate auxiliary contact subassembly periphery protection casing (330), in order to pass through protection casing (330) will auxiliary contact subassembly with main contact subassembly keeps apart.

2. The contact structure according to claim 1, wherein the main contact assembly comprises a main fixed contact (222) and a main contact assembly (210) matched with the main fixed contact (222) to be opened or closed, the auxiliary contact assembly comprises an auxiliary fixed contact (322) and an auxiliary moving contact assembly (310) matched with the auxiliary fixed contact (322) to be opened or closed, the main contact assembly (210) and the auxiliary moving contact assembly (310) are arranged in a linkage manner, and the auxiliary fixed contact (322) and the auxiliary moving contact assembly (310) are both positioned in an inner cavity of the protective cover (330).

3. The contact structure according to claim 2, wherein the active contact assembly (210) is slidably disposed in the contact housing (100), the auxiliary moving contact assembly (310) is fixedly connected to the active contact assembly (210), the protection cover (330) has a first opening, and the protection cover (330) is slidably sleeved on the outer periphery of the auxiliary moving contact assembly (310) through the first opening.

4. A contact arrangement according to claim 3, characterized in that the auxiliary moving contact assembly (310) comprises an auxiliary support (311) and an auxiliary moving contact (314), the auxiliary support (311) being embedded in the first opening of the shield (330) and being in sliding engagement with the shield (330), the auxiliary moving contact (314) and the active contact assembly (210) being fixed to opposite sides of the auxiliary support (311), respectively, and the auxiliary moving contact facing the inner cavity of the shield (330).

5. The contact structure according to claim 4, wherein the active contact assembly (210) includes a main support (211) fixedly disposed on a side of the auxiliary support (311) away from the auxiliary moving contact (314) and an active contact (212) disposed on the main support (211), the active contact (212) and the auxiliary moving contact (314) are both bar-shaped members, and the axial directions of the active contact (212) and the auxiliary moving contact (314) intersect.

6. The contact structure of claim 5, wherein said first opening is located at a bottom wall of said shield (330), and a through slot (335) communicating with said first opening is further provided on opposite side walls of said shield (330) adjacent to said bottom wall, said through slot (335) being in sliding engagement with opposite ends of said active contact (212).

7. The contact structure according to claim 4, further comprising a base plate (332) located at one side of the shield (330) and corresponding to the first opening, wherein the shield (330) is fixedly connected to the base plate (332) by a leg (333), and wherein the base plate (332) has a second opening (334) that at least partially projects and overlaps the first opening, so that the shield (330) is sleeved around the auxiliary contact assembly sequentially through the second opening (334) and the first opening.

8. The contact structure according to any one of claims 2 to 6, wherein an auxiliary lead-out portion (321) is further provided on the auxiliary stationary contact (322), the auxiliary stationary contact (322) sequentially penetrates through the protective cover (330) and the contact housing (100) through the auxiliary lead-out portion (321) and extends to the outside of the contact housing (100), a partition plate (111) is further provided on the inner wall of the contact housing (100), and the partition plate (111) is located between the auxiliary lead-out portion (321) and the main stationary contact (222).

9. The contact structure according to claim 1, wherein the contact housing (100) comprises a housing body (110) having a third opening and a cover plate (120) covering the third opening, an annular connecting sheet (130) is disposed at the periphery of the third opening of the housing body (110), and a plate surface of the cover plate (120) close to one side of the housing body (110) is attached to the annular connecting sheet (130).

10. A contactor comprising a contact structure according to any one of claims 1 to 9.

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