CN222995314U - Contactor - Google Patents

Abstract

A contactor comprises a first functional module, a second functional module and a third functional module, wherein the second functional module is arranged between the first functional module and the third functional module, wherein the first functional module is provided with a coil of an electromagnetic system, wherein the electromagnetic system comprises a moving iron core and a coil for driving the moving iron core to move, wherein the second functional module comprises a contact system and a contact terminal, wherein the contact system comprises a stationary contact and a moving contact, wherein the moving contact is mounted on a contact support driven by the electromagnetic system, wherein the moving iron core of the electromagnetic system is connected to the contact support, wherein the stationary contact is connected to a working circuit via a contact terminal, wherein the third functional module is provided with a coil terminal, wherein the second functional module further comprises a coil connection structure for electrically connecting the coil terminal and the coil, wherein the coil is connected to the coil terminal via the coil connection structure, wherein the layout is not only reasonable, but also the wiring and operation are more convenient.

Description

Contactor

Technical Field

The utility model relates to the field of piezoelectric devices, in particular to a contactor.

Background

The development trend of the existing contactor is miniaturization, compact structure, built-in accessories, convenient wiring and diversified functions.

However, the layout of the existing contactor is unreasonable, so that wiring among the internal contactors is troublesome, and wiring outside the contactors is troublesome. In addition, as the contactor functions are more, the auxiliary modules are more, so that the contactor is more and more bulky and is very troublesome to operate.

Disclosure of Invention

The object of the present utility model is to overcome at least one of the drawbacks of the prior art and to provide a contactor.

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

A contactor comprises a first functional module, a second functional module and a third functional module, wherein the second functional module is arranged between the first functional module and the third functional module,

The first functional module is provided with a coil of an electromagnetic system, the electromagnetic system comprises a movable iron core and a coil for driving the movable iron core to move,

The second functional module comprises a contact system and a contact binding post, the contact system comprises a fixed contact and a moving contact, the moving contact is arranged on a contact support driven by an electromagnetic system, a moving iron core of the electromagnetic system is connected with the contact support, the fixed contact is connected with a working circuit through the contact binding post,

The third functional module is provided with a coil connecting terminal, the second functional module further comprises a coil connecting structure for electrically connecting the coil connecting terminal and the coil, and the coil is connected with the coil connecting terminal through the coil connecting structure.

Preferably, the second functional module comprises a base and a cover sleeved outside the base, the contact system is arranged on the inner side of the base, and the coil connecting structure is located between the outer side of the base and the inner side of the cover.

Preferably, the third functional module is provided with two coil connecting terminals, and the two coil connecting terminals are respectively located right above two connecting positions of the coil.

Preferably, the coil connection structure comprises a first conductive member connected with the coil and a second conductive member connected with the coil wiring terminal, and the first conductive member is connected with the second conductive member.

Preferably, the first conductive element comprises a clamping elastic piece, the clamping elastic piece comprises a contact part with elasticity and a connecting part positioned on the side surface of the contact part, the connecting part is used for connecting the coils, and the second conductive element is in plug connection with the clamping elastic piece.

Preferably, the coil binding post includes coil lug, coil line ball piece and coil wiring screw, and coil wiring screw passes coil line ball piece and coil lug to be connected, and coil wiring screw is used for driving coil line ball piece and compresses tightly the wire on the coil lug, coil lug and second electrically conductive piece integrated into one piece.

Preferably, a coil wiring groove is formed in the side surface of the base, and the coil wiring groove is used for accommodating the coil connecting structure.

Preferably, the third functional module comprises an auxiliary module comprising one of an interlock module, an auxiliary contact module, and a surge protection module, or any combination of the plurality thereof.

Preferably, the third functional module is provided with an interlocking module, the interlocking module and the two coil wiring terminals are oppositely arranged at two sides of the third functional module, two auxiliary contact modules are arranged between the interlocking module and the two coil wiring terminals, and a surge protection module is arranged between the two coil wiring terminals.

Preferably, an auxiliary contact module is arranged in the third functional module, the contact support is provided with an auxiliary supporting part inserted into the third functional module, the auxiliary contact module comprises two auxiliary fixed contacts arranged at intervals and auxiliary connecting terminals respectively arranged on the auxiliary fixed contacts, the auxiliary supporting part is inserted between the two auxiliary fixed contacts of the auxiliary contact module, the auxiliary supporting part is provided with an auxiliary moving contact, and when the contact support drives the moving contact to contact with and separate from the fixed contacts, the auxiliary moving contact can be simultaneously driven to move to contact with and separate from the auxiliary fixed contacts, so that the auxiliary contact module switches output states.

Preferably, the auxiliary supporting part is provided with an auxiliary supporting groove, two opposite groove walls of the auxiliary supporting groove are respectively provided with an auxiliary spring table for fixing an auxiliary contact spring and an auxiliary limiting surface for limiting an auxiliary moving contact, the auxiliary contact spring pushes the middle part of the auxiliary moving contact to enable the middle part of the auxiliary moving contact to be limited with the auxiliary limiting surface, two ends of the auxiliary moving contact extend to two sides of the auxiliary supporting part respectively, and when the auxiliary moving contact is contacted with the auxiliary fixed contact, the auxiliary contact spring is compressed and pushes the auxiliary moving contact to enable the auxiliary moving contact to be tightly pressed with the auxiliary fixed contact.

Preferably, the auxiliary contact module comprises two auxiliary contact modules, the two auxiliary contact modules are respectively a normally open contact and a normally closed contact, two auxiliary supporting grooves corresponding to the two auxiliary contact modules are arranged on the auxiliary supporting portion, auxiliary moving contacts are respectively arranged in the two auxiliary supporting grooves, the two auxiliary moving contacts are located at different heights, one auxiliary moving contact is in contact with the corresponding auxiliary fixed contact and forms the normally closed contact, and the other auxiliary moving contact is separated from the corresponding auxiliary fixed contact and forms the normally open contact.

Preferably, the third functional module is provided with an interlocking module, the interlocking module comprises a bracket and an interlocking piece rotationally arranged on the bracket, the interlocking piece comprises a pivoting part rotationally connected with the bracket, and a first locking part and a second locking part which are oppositely arranged on two sides of the pivoting part, the first locking part extends out of the contactor and is used for being inserted into an adjacent contactor and is matched with a contact support of the adjacent contactor, the second locking part is matched with the contact support of the contactor, and when one contactor is switched on, the contact support of the other contactor is locked through the interlocking piece, so that the contactor cannot be switched on.

Preferably, the second functional module comprises a base and a cover sleeved outside the base, the third functional module comprises a cover, the cover is clamped on the base along a first direction, the cover is clamped on the cover along a second direction, or is clamped on the base and extends to a structure outside the cover, and the first direction is perpendicular to the second direction.

Preferably, the face cover is provided with a sealing hole and a detachable sealing plug for plugging into the sealing hole.

Preferably, the first functional module, the second functional module and the third functional module are sequentially arranged along the height direction of the contactor, the length of the third functional module is smaller than that of the second functional module in the length direction of the contactor, and screw holes corresponding to the contact wiring terminals are respectively arranged at two ends of the top surface of the second functional module in the length direction of the contactor.

According to the contactor, the coil connecting structure for electrically connecting the coil connecting terminal and the coil is arranged in the second functional module, and the coil connecting terminal is integrated in the third functional module at the top, so that the contactor is more reasonable in layout and more convenient to wire and operate.

In addition, through setting up supplementary module in the third functional module, can make coil binding post and supplementary module integrate together, the third functional module wiring and the operation at top are more convenient, and the customer has better discernment when using moreover.

In addition, two coil binding post are located respectively directly over two wiring positions of coil, set up coil binding post at the third functional module for coil binding post can be located directly over the wiring position of coil, the wiring of being convenient for.

In addition, the coil connecting structure is located between the outer side of the base and the inner side of the cover cap, and an insulating structure is not required to be additionally arranged for insulating the coil connecting structure, so that not only can the coil connecting structure be insulated from a contact system on the inner side of the base, but also the cover cap buckled on the base can cover the second conductive piece, and the insulating effect of the coil connecting structure is achieved.

Drawings

FIG. 1 is a schematic view of the structure of the contactor of the present utility model;

FIG. 2 is a schematic view of the structure of the hidden panel cover of the contactor of the present utility model;

FIG. 3 is a schematic view of the assembly of the cover of the contactor of the present utility model;

FIG. 4 is a schematic diagram of the interlock module of the present utility model mated with two contactors;

FIG. 5 is an enlarged view of a portion of FIG. 4 in accordance with the present utility model;

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

In the figure, a first functional module 1, a second functional module 2, a third functional module 3, a coil connecting terminal 31, a face cover 32, an interlocking module 33, an auxiliary contact module 34, a surge protection module 35, a base 21, a cover 22, a contact connecting terminal 23, a fixed contact 24, a contact support 25, a coil connecting structure 26, a first conductive member 261, a second conductive member 262, a coil wiring groove 210, a clamping spring 263, a contact portion 264, a connecting portion 265, a coil connecting tab 311, a coil pressing tab 312, a coil connecting screw 313, an auxiliary support portion 251, an auxiliary fixed contact 341, an auxiliary connecting terminal 342, an auxiliary moving contact 343, an auxiliary support groove 252, an auxiliary spring table 253, an auxiliary limiting surface 254, a sealing plug 321, an interlocking member 331, a pivot portion 332, a first locking portion 333, a second locking portion 334, and a sliding portion 255.

Detailed Description

Specific embodiments of the contactor of the present utility model are further described below with reference to the examples shown in the drawings. The contactor of the present utility model is not limited to the description of the following embodiments.

As shown in fig. 1-3, the contactor of the present embodiment is divided into an upper layer structure, a middle layer structure and a lower layer structure according to a hierarchical structure, wherein the three layers are respectively a first functional module 1, a second functional module 2 and a third functional module 3 which are sequentially arranged in a housing, and the second functional module 2 is located between the first functional module 1 and the third functional module 3;

The first functional module 1 comprises a base and a coil which is arranged in the base and is not shown in an electromagnetic system diagram, the electromagnetic system comprises a movable iron core and a coil for driving the movable iron core to move, a mounting structure is not shown in a mounting structure diagram outside the base, the mounting structure is used for mounting the contactor in a working position, and the mounting structure can comprise a guide rail mounting hole and a screw mounting hole;

The third functional module 3 comprises an auxiliary module and two coil connection terminals 31 for connecting a control circuit, and a face cover 32 for covering the auxiliary module and the two coil connection terminals 31, wherein the auxiliary module comprises one or any combination of an interlocking module 33, an auxiliary contact module 34 and a surge protection module 35;

The second functional module 2 comprises a base 21 arranged on the first functional module 1 and a cover 22 sleeved outside the base 21, wherein a contact system, an arc extinguishing system are arranged in the base 21, the arc extinguishing system is not shown in the drawing, and a contact wiring terminal 23 is electrically connected with the contact system, the contact system comprises at least one moving contact and two fixed contacts 24 respectively arranged at two ends of the corresponding moving contact, the moving contact is arranged on a contact support 25 driven by an electromagnetic system, the contact support 25 drives the moving contact to contact with and separate from the corresponding two fixed contacts 24 under the driving of the electromagnetic system, the two fixed contacts 24 are connected with or disconnected from each other through the moving contact, one end of the fixed contact 24, which is far away from the corresponding moving contact, extends out of the base 21 and is connected with the contact wiring terminal 23, the contact support 25 is arranged in the second functional module 2 in a sliding manner, a moving iron core of the electromagnetic system is connected with the contact support 25, the moving contact support 25 is arranged at the joint of the third functional module 3 and the second functional module 2 in a vertical linear manner, the moving iron core can be arranged in the second functional module 2 or the third functional module 3, the moving support 25 can move linearly into the top functional module 3, and the third functional module 3 can move linearly, or the top functional module can move into the third functional module 3. The base of the first functional module 1, the base 21 of the second functional module 2, the cover 22 of the second functional module 2 and the cover 32 of the third functional module 3 form the housing of the contactor.

As shown in fig. 3, a modification of this embodiment is that the second functional module 2 includes a coil connection structure 26 for electrically connecting a coil connection terminal 31 of the third functional module 3 and a coil, two ends of the coil are respectively connected with the two coil connection terminals 31 through the coil connection structure 26 to access a control circuit, and the control circuit drives the moving iron core to act by controlling the coil, so that the iron core drives the moving contact to contact with and separate from the fixed contact 24, so as to respectively connect and disconnect the working circuit accessed by the contact connection terminal 23.

The contactor of the present embodiment, by providing the coil connection structure 26 for electrically connecting the coil connection terminal 31 with the coil in the second functional module 2, integrates the coil connection terminal 31 in the third functional module 3 at the top, not only is the layout more reasonable, but also the wiring and operation are more convenient.

In addition, by arranging the auxiliary module in the third functional module 3, the coil connecting terminal 31 and the auxiliary module can be integrated together, the third functional module 3 at the top is more convenient to connect and operate, and the customer has better identification degree in use.

Further, the two coil connection terminals 31 are respectively located right above the two connection positions of the coil, and the coil connection terminals 31 are arranged on the third functional module 3, so that the coil connection terminals 31 can be located right above the connection positions of the coil, and wiring is facilitated.

Further, the coil connection structure 26 is located between the outer side of the base 21 and the inner side of the cover 22, and no additional insulation structure is required to be provided for insulating the coil connection structure 26, so that not only can the coil connection structure 26 be insulated from the contact system on the inner side of the base 21, but also the cover 22 fastened to the base 21 can cover the second conductive member, thereby insulating the coil connection structure 26. Of course, the coil connecting structure 26 may pass through the inside of the base 21, but an insulating structure needs to be added to the outside of the coil connecting structure 26. Preferably, a coil wiring groove 210 is provided on a side surface of the base 21, and the coil wiring groove 210 is used for accommodating the coil connection structure 26.

Further, the coil connection structure 26 includes two first conductive members 261 connected to two ends of the coil, and two second conductive members 262 connected to two coil connection terminals 31, where the two first conductive members 261 are connected to the two second conductive members 262. Specifically, the first conductive member 261 includes a clamping elastic piece 263, the clamping elastic piece 263 includes a contact portion 264 having elasticity, and a connection portion 265 located at a side surface of the contact portion 264, the connection portion 265 is used for connecting a coil, and the second conductive member 262 is in plug connection with the clamping elastic piece 263, so that the assembly is convenient;

The coil wiring terminal 31 includes a coil wiring piece 311, a coil wire pressing piece 312 and a coil wiring screw 313, the coil wiring screw 313 passes through the coil wire pressing piece 312 and is connected with the coil wiring piece 311, the coil wiring screw 313 is used for driving the coil wire pressing piece 312 to press a wire on the coil wiring piece 311, the coil wiring piece 311 and the corresponding second conductive piece 262 are integrally formed, the assembly difficulty can be reduced, and the process of connecting the second conductive piece 262 with the coil wiring terminal 31 is omitted. It should be appreciated that, as other embodiments, the coil connection structure 26 may be a non-plug-in structure, which falls within the scope of the present utility model.

As shown in fig. 2, the first functional module 1, the second functional module 2 and the third functional module 3 are sequentially arranged along the height direction of the contactor, the length of the third functional module 3 is smaller than that of the second functional module 2 along the length direction of the contactor, screw holes corresponding to the contact connecting terminals 23 are respectively arranged at two ends of the top surface of the second functional module 2 along the length direction of the contactor, the third functional module 3 is provided with an interlocking module 33, the interlocking module 33 and the two coil connecting terminals 31 are arranged at intervals, the interlocking module 33 and the two coil connecting terminals 31 are oppositely arranged at two sides of the third functional module 3 along the width direction of the contactor, two auxiliary contact modules 34 are arranged between the interlocking module 33 and the two coil connecting terminals 31, and a surge protection module 35 is arranged between the two coil connecting terminals 31.

In the contactor of this embodiment, on the basis of realizing the modularization of the functional areas by the first functional module 1, the second functional module 2 and the third functional module 3, the third functional module 3 is further divided into areas according to the functions of different auxiliary modules, so that various auxiliary modules can be built in the third functional module 3. In addition, the auxiliary contact modules 34 are arranged on the side surfaces of the two coil connection terminals 31, so that the installation and the series connection of the external series resistance modules can be facilitated. It is understood that only one of the auxiliary modules may be provided, or a combination of a plurality of auxiliary modules may be provided, which falls within the protection scope of the present utility model.

Further, as shown in fig. 2 and 6, the contact support 25 is provided with a sliding part 255, the sliding part 255 is provided with an auxiliary support part 251 inserted into the third functional module 3, the auxiliary contact module 34 includes two auxiliary fixed contacts 341 arranged at intervals, and auxiliary connection terminals 342 respectively arranged on the auxiliary fixed contacts 341, the auxiliary support part 251 is inserted between the two auxiliary fixed contacts 341 of the auxiliary contact module 34, the auxiliary support part 251 is provided with an auxiliary moving contact 343 for electrically connecting with the two auxiliary fixed contacts 341, and when the contact support 25 drives the moving contact to contact with and separate from the fixed contact 24, the auxiliary moving contact 343 can be simultaneously driven to move to contact with and separate from the auxiliary fixed contact 341, so that the auxiliary contact module 34 switches output states.

Further, an auxiliary supporting groove 252 is formed in the auxiliary supporting portion 251, an auxiliary spring table 253 for fixing an auxiliary contact spring diagram, and an auxiliary limiting surface 254 for limiting the auxiliary moving contact 343 are respectively formed in two opposite groove walls of the auxiliary supporting groove 252, the auxiliary contact spring is used for pushing the middle portion of the auxiliary moving contact 343, so that the middle portion of the auxiliary moving contact 343 is limited by the auxiliary limiting surface 254, two ends of the auxiliary moving contact 343 extend to two sides of the auxiliary supporting portion 251 respectively, and when the auxiliary moving contact 343 contacts with the auxiliary fixed contact 341, the auxiliary contact spring is compressed and pushes the auxiliary moving contact 343, so that the auxiliary moving contact 343 is compressed with the auxiliary fixed contact 341.

The contactor of this embodiment has two auxiliary contact modules 34, and the two auxiliary contact modules 34 are respectively a normally open contact and a normally closed contact, two auxiliary supporting slots 252 corresponding to the two auxiliary contact modules 34 are respectively provided on the auxiliary supporting portion 251, auxiliary moving contacts 343 are respectively provided in the two auxiliary supporting slots 252, the two auxiliary supporting slots 252 are located at different heights, so that the two auxiliary moving contacts 343 are located at different heights, one auxiliary moving contact 343 contacts with the corresponding auxiliary fixed contact 341 and forms a normally closed contact, the other auxiliary moving contact 343 is separated from the corresponding auxiliary fixed contact 341 and forms a normally open contact, and when the auxiliary moving contact 343 of the normally open auxiliary contact contacts with the corresponding auxiliary fixed contact 341, the auxiliary moving contact 343 of the normally closed auxiliary contact is separated from the corresponding auxiliary fixed contact 341.

Therefore, the two auxiliary contacts of the normally open contact and the normally closed contact are prevented from being arranged at different heights, the two auxiliary contacts of the normally open contact and the normally closed contact are arranged in the third functional module 3 at the same time, the height of the third functional module 3 can be effectively reduced, the structure of the auxiliary contact is more compact, and the height of the third functional module 3 meets the size requirement after being combined with the first functional module 1 and the second functional module 2. It is of course also possible to implement other ways, for example to arrange the two auxiliary contact modules 34 at different heights, but to increase the height of the third functional module 3, all falling within the scope of the utility model. In addition, both auxiliary contact modules 34 may be normally open contacts or normally closed contacts, and one or more auxiliary contact modules 34 may be provided for the contactor.

As shown in fig. 3, the cover 22 is clamped to the base 21 along a first direction, the cover 32 is clamped to the cover 22 along a second direction, or is clamped to the base 21 and extends to an outer structure of the cover 22, and the first direction is perpendicular to the second direction, so that the assembly is convenient, and the cover 32 can play a role of limiting the cover 22.

Further, the cover 32 is of an integral structure or a split structure, and the cover 32 of the split structure is provided with a sealing hole corresponding to the surge protection module 35, and a detachable sealing plug 321 for plugging into the sealing hole, so that the electronic circuit board of the surge protection module 35 can be conveniently installed and detached.

As shown in fig. 4-5, the interlocking module 33 includes a bracket and an interlocking part 331 rotatably disposed on the bracket, the bracket is fixedly disposed in a housing of the contactor, the bracket is disposed in the third functional module 3 at the top of the contactor in this embodiment, the interlocking part 331 includes a pivoting part 332 rotatably connected with the bracket, and a first locking part 333 and a second locking part 334 oppositely disposed at two sides of the pivoting part 332, the first locking part 333 extends to the outside of the contactor for inserting into an adjacent contactor and matching with the contact support 25 of the adjacent contactor, the second locking part 334 matches with the contact support 25 of the contactor, when the contactor is switched on with one of the adjacent contactors, the contact support 25 of the other contactor is locked by the interlocking part 331, so that the locked contactor cannot be switched on, and the two contactors are prevented from being switched on simultaneously, thereby realizing the interlocking of the two contactors

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 (16)

1. A contactor comprises a first functional module (1), a second functional module (2) and a third functional module (3), wherein the second functional module (2) is arranged between the first functional module (1) and the third functional module (3),

The first functional module (1) is provided with a coil of an electromagnetic system, the electromagnetic system comprises a movable iron core and a coil for driving the movable iron core to move,

The second functional module (2) comprises a contact system and a contact binding post (23), the contact system comprises a fixed contact (24) and a moving contact, the moving contact is arranged on a contact support (25) driven by an electromagnetic system, a moving iron core of the electromagnetic system is connected with the contact support (25), the fixed contact (24) is connected with a working circuit through the contact binding post (23),

The multifunctional electric motor is characterized in that the third functional module (3) is provided with a coil wiring terminal (31), the second functional module (2) further comprises a coil connecting structure (26) used for electrically connecting the coil wiring terminal (31) and a coil, and the coil is connected with the coil wiring terminal (31) through the coil connecting structure (26).

2. The contactor according to claim 1, characterized in that the second functional module (2) comprises a base (21) and a cover (22) covering the outside of the base (21), the contact system being arranged on the inside of the base (21), the coil connection structure (26) being located between the outside of the base (21) and the inside of the cover (22).

3. The contactor according to claim 1, wherein the third functional module (3) is provided with two coil connection terminals (31), the two coil connection terminals (31) being located directly above the two connection positions of the coil, respectively.

4. The contactor of claim 1, wherein the coil connection structure (26) includes a first conductive member (261) connected to the coil and a second conductive member (262) connected to the coil connection terminal (31), the first conductive member (261) being connected to the second conductive member (262).

5. The contactor according to claim 4, wherein the first conductive member (261) comprises a clamping spring (263), the clamping spring (263) comprises a contact portion (264) having elasticity, and a connection portion (265) located at a side of the contact portion (264), the connection portion (265) is used for connecting the coil, and the second conductive member (262) is in plug connection with the clamping spring (263).

6. The contactor of claim 4, wherein the coil connection terminal (31) comprises a coil connection piece (311), a coil pressing piece (312) and a coil connection screw (313), the coil connection screw (313) penetrates through the coil pressing piece (312) to be connected with the coil connection piece (311), the coil connection screw (313) is used for driving the coil pressing piece (312) to press a wire on the coil connection piece (311), and the coil connection piece (311) and the second conductive piece (262) are integrally formed.

7. The contactor according to claim 2, wherein the side surface of the base (21) is provided with coil wiring grooves (210), the coil wiring grooves (210) being adapted to accommodate the coil connection structures (26).

8. The contactor according to claim 1, wherein the third functional module (3) comprises an auxiliary module comprising one of an interlock module (33), an auxiliary contact module (34) and a surge protection module (35), or any combination of the plurality thereof.

9. The contactor according to claim 1, wherein the third functional module (3) is provided with an interlocking module (33), the interlocking module (33) is disposed opposite to the two coil connection terminals (31) on both sides of the third functional module (3), two auxiliary contact modules (34) are disposed between the interlocking module (33) and the two coil connection terminals (31), and a surge protection module (35) is disposed between the two coil connection terminals (31).

10. The contactor according to claim 1, wherein an auxiliary contact module (34) is disposed in the third functional module (3), the contact support (25) is provided with an auxiliary support portion (251) inserted into the third functional module (3), the auxiliary contact module (34) comprises two auxiliary fixed contacts (341) disposed at intervals, and auxiliary connection terminals (342) disposed on the auxiliary fixed contacts (341) respectively, the auxiliary support portion (251) is inserted between the two auxiliary fixed contacts (341) of the auxiliary contact module (34), an auxiliary moving contact (343) is disposed on the auxiliary support portion (251), and when the moving contact is contacted with and separated from the fixed contact (24) by the contact support (25), the auxiliary moving contact (343) can be simultaneously driven to move to contact with and separate from the auxiliary fixed contact (341), so that the auxiliary contact module (34) can switch output states.

11. The contactor of claim 10, wherein the auxiliary supporting portion (251) is provided with an auxiliary supporting groove (252), two opposite groove walls of the auxiliary supporting groove (252) are respectively provided with an auxiliary spring table (253) for fixing an auxiliary contact spring and an auxiliary limiting surface (254) for limiting an auxiliary moving contact (343), the auxiliary contact spring pushes the middle part of the auxiliary moving contact (343) to enable the middle part of the auxiliary moving contact (343) to be limited with the auxiliary limiting surface (254), two ends of the auxiliary moving contact (343) respectively extend to two sides of the auxiliary supporting portion (251), and when the auxiliary moving contact (343) is contacted with the auxiliary fixed contact (341), the auxiliary contact spring is compressed and pushes the auxiliary moving contact (343) to enable the auxiliary moving contact (343) to be compressed with the auxiliary fixed contact (341).

12. The contactor of claim 11, wherein the contactor comprises two auxiliary contact modules (34), the two auxiliary contact modules (34) are respectively a normally open contact and a normally closed contact, two auxiliary supporting grooves (252) corresponding to the two auxiliary contact modules (34) are respectively arranged on the auxiliary supporting portion (251), auxiliary moving contacts (343) are respectively arranged in the two auxiliary supporting grooves (252), the two auxiliary moving contacts (343) are positioned at different heights, one auxiliary moving contact (343) is contacted with the corresponding auxiliary fixed contact (341) and forms the normally closed contact, and the other auxiliary moving contact (343) is separated from the corresponding auxiliary fixed contact (341) and forms the normally open contact.

13. The contactor according to claim 1, wherein the third functional module (3) is provided with an interlocking module (33), the interlocking module (33) comprises a bracket and an interlocking piece (331) rotatably arranged on the bracket, the interlocking piece (331) comprises a pivoting part (332) rotatably connected with the bracket, and a first locking part (333) and a second locking part (334) oppositely arranged at two sides of the pivoting part (332), the first locking part (333) extends out of the contactor and is used for being inserted into an adjacent contactor and is matched with a contact support (25) of the adjacent contactor, the second locking part (334) is matched with the contact support (25) of the contactor, and when one contactor is closed, the contact support (25) of the other contactor is locked through the interlocking piece (331), so that the contactor cannot be closed.

14. The contactor according to claim 1, wherein the second functional module (2) comprises a base (21) and a cover (22) covering the outside of the base (21), the third functional module (3) comprises a cover (32), the cover (22) is clamped to the base (21) along a first direction, the cover (32) is clamped to the cover (22) along a second direction, or is clamped to the base (21) and extends to a structure outside the cover (22), and the first direction is perpendicular to the second direction.

15. The contactor according to claim 14, wherein the cover (32) is provided with a sealing hole and a removable sealing plug (321) for plugging into the sealing hole.

16. The contactor according to claim 1, wherein the first functional module (1), the second functional module (2) and the third functional module (3) are sequentially arranged along the height direction of the contactor, the length of the third functional module (3) is smaller than the length of the second functional module (2) in the length direction of the contactor, and screw holes corresponding to contact connection terminals (23) are respectively arranged at two ends of the top surface of the second functional module (2) in the length direction of the contactor.