Contact system and contactor

Abstract

The contact system comprises at least two contact modules and a supporting seat, each contact module comprises a first module shell, a moving contact, a static contact and a contact support, the moving contact, the static contact and the contact support are arranged in the first module shell, the contact support is movably arranged in the first module shell, the moving contact is arranged on the contact support, and the static contact is arranged on the static contact. The contact support can move relative to the first module shell to drive the moving contact to be in contact with the static contact, the contact support is provided with a linkage part extending out of the first module shell, the at least two contact modules are arranged side by side, and the support seat is fixedly connected with the linkage part of the at least two contact modules. The contact module is convenient to disassemble and replace, can be produced in batches and installed in a multi-pole circuit, can be quickly assembled and replaced, improves the product assembly and after-sales part replacement efficiency, improves the operation and maintenance efficiency, and reduces the use cost of customers.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical appliances, specifically to a contact system and a contactor. Background Technology

[0002] Contactors are widely used in the electrical industry. Inside a contactor are moving contacts and stationary contacts. The moving contacts and stationary contacts work together to make or break a circuit.

[0003] In the current electrical market, contactors consist of multiple sets of moving and stationary contacts. During frequent use, some moving or stationary contacts need to be replaced due to wear, while others can still be used. In the existing technology, after the moving and stationary contacts wear out, the entire contactor needs to be replaced, which results in high operating costs for customers and low maintenance efficiency for electrical equipment. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a contact system and contactor that can partially replace the moving contact and the stationary contact.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] In a first aspect, this application provides a contact system, including at least two contact modules and a support base. Each contact module includes a first module housing and a moving contact, a stationary contact, and a contact support disposed within the first module housing. The contact support is movably disposed within the first module housing, and the moving contact is disposed on the contact support. The contact support is movable relative to the first module housing to drive the moving contact to contact the stationary contact. The contact support is provided with a linkage portion extending out of the first module housing. At least two of the contact modules are arranged side by side, and the support base is fixedly connected to the linkage portions of the at least two contact modules.

[0007] In one possible implementation, the support base is connected to a support platform, the support platform is provided with a first through hole, and the support base is slidably disposed within the first through hole.

[0008] In one possible implementation, the contact support includes a mounting platform connected to the linkage, the mounting platform being installed inside the first module housing, and the moving contact being fixedly mounted on the mounting platform.

[0009] In one possible implementation, the support base has a mounting groove on one side opposite the linkage part, the mounting groove extending along the thickness direction of the contact module to both sides of the support base, and the linkage part is at least partially installed in the mounting groove.

[0010] In one possible implementation, the contact supports connection with a reset element, which drives the contact to move in a direction that separates from or contacts the stationary contact.

[0011] In one possible implementation, the contact support has an internal receiving cavity with the opening of the receiving cavity facing away from the linkage part. The reset member is at least partially disposed in the receiving cavity, with one end of the reset member connected to the bottom wall of the receiving cavity and the other end connected to the inner wall of the first module housing.

[0012] In one possible implementation, the first module housing has a second through hole, and the cross-section of the mounting platform is consistent with the shape of the second through hole; the linkage part includes two first retaining walls, a first retaining groove is formed between the two first retaining walls, the two first retaining walls protrude from the mounting platform, and the first retaining wall near the mounting platform abuts against the first module housing.

[0013] In one possible implementation, the linkage includes two first retaining walls, with a first retaining groove formed between the two first retaining walls, and a first buckle is provided on the support seat. The support seat and the linkage are fixed together by the first buckle and the first retaining groove.

[0014] In one possible implementation, the first module housing includes a first module base and a first module cover, the contact support, moving contact and stationary contact are disposed on the first module base, and the first module cover is fitted onto the first module base.

[0015] In one possible implementation, the side of the linkage facing the support seat is provided with at least one first elastic member, the first elastic member being located between the linkage and the support seat, and the elasticity of the first elastic member pressing and fixing the contact module and the support seat together.

[0016] In one possible implementation, the linkage part has two first elastic members on the side facing the support base, and a guide groove is provided between the two first elastic members. The guide groove and the two first elastic members are parallel to each other. The mounting groove of the support base has a guide protrusion that cooperates with the guide groove. The two ends of the guide protrusion extend to both sides of the support base along the thickness direction of the contact module.

[0017] In one possible implementation, the first elastic element is a metal sheet, and the two ends of the first elastic element are bent toward each other to form a second barb. The linkage part is provided with a second slot that cooperates with the second barb. The first elastic element is installed on the linkage part through the second barb. The first elastic element is a flat plate structure, and the side of the linkage part facing the support seat is provided with two grooves facing each other along the thickness direction of the contact module. The two ends of the first elastic element are bent toward each other and inserted into the two grooves.

[0018] Secondly, this application provides a contactor that includes the contact system described above.

[0019] In one possible implementation, an electromagnetic system is also included, comprising a second module housing and a moving iron core. The second module housing contains a coil and a stationary iron core, and the moving iron core is mounted on the support base. The contact system has a support platform fixedly connected to the first module housing of at least two contact modules, and the support platform and the second module housing are fixedly installed.

[0020] In one possible implementation, an electromagnetic system and a contactor housing are also included. The electromagnetic system includes a coil, a stationary iron core, and a moving iron core, with the stationary iron core at least partially mounted within the coil and the moving iron core disposed on the support base. The electromagnetic system and the contact system are disposed within the contactor housing.

[0021] Compared to existing technologies, the outstanding advantage of this application lies in its modular design of the contact system. The contact system includes at least two contact modules and a support base. Each contact module includes a first module housing and a moving contact, a stationary contact, and a contact support disposed within the first module housing. The contact supports of at least two contact modules are fixedly installed with the support base. Movement of the support base can drive the movement of multiple contact supports. The moving contact is disposed on the contact support, and the stationary contact is disposed within the first module housing. Movement of the contact support can drive the moving contact to contact or disconnect with the stationary contact. This application is easy to disassemble and replace, can be mass-produced, and can be installed in multi-pole circuits. At the same time, it allows for rapid assembly and replacement of contact modules, improving product assembly and after-sales component replacement efficiency, enhancing maintenance efficiency, and reducing customer usage costs.

[0022] Furthermore, a first elastic element is provided on the side of the linkage unit facing the support base. The linkage unit is installed in the mounting groove of the support base, and the elasticity of the first elastic element presses and fixes the contact module and the support base together.

[0023] Furthermore, the support base is provided with a guide protrusion that extends along the thickness direction of the contact module. The side of the linkage unit facing the support base is provided with a guide groove, and the guide protrusion is installed in the guide groove. The guide protrusion and the guide groove cooperate to guide the movement of the linkage unit in the support base, enabling the linkage unit to move stably and preventing the linkage unit and the support base from shifting or deflecting and getting stuck. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the contactor of this utility model, which includes three contact modules;

[0025] Figure 2 and Figure 3 This is an exploded view of the contactor contact system of this utility model;

[0026] Figure 4 This is an exploded view of the contact module of this utility model;

[0027] Figure 5 This is a schematic diagram of the contact support structure of this utility model;

[0028] Figure 6 This is a schematic diagram of the structure of the contactor of this utility model, which includes four contact modules;

[0029] Figure 7 This is a schematic diagram of the structure of the first module housing and contact support of the contactor of this utility model after disassembly;

[0030] The reference numerals in the attached drawings include: stationary contact 4; contact module 2; contact support 3; support platform 11; support base 12; protrusion 13; second mounting part 14; first through hole 15; linkage part 31; mounting platform 32; first module base 21; first module cover 22; mounting groove 121; first buckle 122; first slot 35; first elastic element 33; guide protrusion 123; guide groove 34; terminal 41; second through hole 23. Detailed Implementation

[0031] The specific embodiments of this utility model are further described below with reference to the accompanying drawings. The scope of protection of this utility model is not limited to the description of the following embodiments.

[0032] The contactor includes a contact system and an electromagnetic system. The contact system includes stationary contacts 4, moving contacts, and a contact support. The electromagnetic system includes a stationary iron core, a moving iron core, and a coil for driving the moving iron core. The moving iron core is connected to the contact support 3, and the stationary iron core and moving iron core are arranged opposite to each other. The coil is located between the stationary iron core and the moving iron core. Multiple moving contacts are arranged on the contact support 3, each moving contact corresponding to two stationary contacts 4. Each moving contact has moving contacts at both ends, which contact or separate from the two stationary contacts 4 arranged at both ends of the contactor. Each end of the contactor has two contact terminals connected to the two stationary contacts 4. The contactor also has a coil terminal electrically connected to the coil of the electromagnetic system. The two contact terminals serve as the input and output terminals for connecting the power supply and the load, respectively. The coil terminal is used to connect to the control power supply to power or de-power the coil, thereby driving the moving iron core to move the contact support 3. The contact support 3 then drives the moving contacts to contact or separate from the two stationary contacts 4. This is prior art in the art.

[0033] like Figures 1-6As shown, this utility model provides a contactor, including a contact system and an electromagnetic system. The contact system includes at least two contact modules 2 and a support base 12. Each contact module 2 includes a first module housing and a moving contact, a stationary contact 4, and a contact support 3 disposed within the first module housing. The contact support 3 is movably disposed within the first module housing, and the moving contact is disposed on the contact support 3. The contact support 3 can move relative to the first module housing to drive the moving contact to contact the stationary contact 4. The contact support 3 is provided with a linkage part 31 extending out of the first module housing. At least two of the contact modules 2 are arranged side by side, and the support base 12 is fixedly connected to the linkage part 31 of at least two contact modules 2.

[0034] The technical advantage of this application lies in the modular design of the contact system, which includes at least two contact modules 2 and a support base 12. Each contact module 2 includes a first module housing and a moving contact, a stationary contact 4, and a contact support 3 disposed within the first module housing. The contact supports 3 of at least two contact modules 2 are fixedly installed with the support base 12. Movement of the support base 12 can drive the movement of multiple contact supports 3. The contact supports 3 are provided with moving contacts, and the first module housing is provided with stationary contacts 4. Movement of the contact supports 3 can drive the moving contacts to move and contact or disconnect with the stationary contacts 4. This application is easy to disassemble and replace, can be mass-produced, and can be installed in multi-pole circuits. At the same time, it allows for quick assembly and replacement of contact modules 2, improving product assembly and after-sales component replacement efficiency, enhancing maintenance efficiency, and reducing customer usage costs.

[0035] Preferably, in one possible implementation, the support base 12 is fixedly connected to the moving iron core (not shown in the figure). The movement of the moving iron core can drive the support base 12 to move. The support base 12 is fixedly connected to the linkage part 31 of at least two contact modules 2. Therefore, the movement of the moving iron core can drive the contact support 3 to move within the first module housing.

[0036] Preferred, such as Figure 2 and Figure 3 As shown, the contact system also includes a support platform 11, and a support base 12 is movably mounted on the support platform 11. The support platform 11 is fixedly connected to the first module housing of at least two contact modules 2. Furthermore, the support platform 11 has a first through hole 15, and the support base 12 is installed in the first through hole 15. The support base 12 can slide telescopically within the first through hole 15.

[0037] Furthermore, the support base 12 is provided with multiple slide rails, and the support platform 11 is provided with multiple sliding grooves that cooperate with the slide rails, so that the support base 12 can slide within the support platform 11. Since the contact module 2 adopts a modular design, it is easy to replace. However, repeated replacements can easily damage the support base 12. Therefore, the support platform 11 and the support base 12 adopt a separate installation structure, which makes it easy to replace one of them after the support base 12 or the support platform 11 is damaged, thus saving costs.

[0038] Preferably, in one embodiment of the contactor, the electromagnetic system includes a second module housing and the moving iron core. The second module housing contains a coil and a stationary iron core, with the stationary iron core at least partially installed within the coil. Two terminals of the coil extend out of the second module housing. The second module housing is fixedly connected to a support platform 11, aligning the coil and stationary iron core with the moving iron core on the support base 12. When the two terminals of the coil are powered, the stationary iron core generates a magnet, attracting the moving iron core and causing the support base 12 to move within the support platform 11. The support base 12 then moves at least two contact supports 3 in the first module housings together, causing the moving contact to contact or disconnect from the stationary contact 4. The second module housing is connected to the support platform 11, and the at least two first module housings, the second module housing, and the support platform 11 constitute the contactor housing.

[0039] Furthermore, in another embodiment of the contactor, the contactor also includes a separate contactor housing, and the electromagnetic system, support platform 11, support base 12, and at least two contact modules 2 are all disposed within the contactor housing. The coil and the stationary iron core correspond to the moving iron core on the support base 12. When the coil is energized, it generates an attractive force on the moving iron core, thereby driving the support base 12 and the contact supports 3 in the at least two first module housings to move together. As an alternative embodiment, the support platform 11 may not be provided, and the support base 12 may slide with the housing.

[0040] As another possible implementation, the moving iron core is not mounted on the support base 12; instead, the moving iron core drives the support base 12 to move via a push rod. The moving iron core is slidably positioned, and the push rod is connected to it. The push rod passes through the support platform 11 to push or pull the support base 12, thereby causing at least two contact supports 3 in the first module housing to move together via the support base 12. The moving iron core, the stationary iron core, and the coil are mounted together within the second module housing or a separate contactor housing.

[0041] Preferably, the support base 11 has at least two protrusions 13 relative to the contact module 2, and the at least two protrusions 13 are provided with first mounting portions. The support base 12 and the multiple contact modules 2 are fixedly installed by means of the first mounting portions and can be applied in 3-pole, 4-pole or multi-pole circuits.

[0042] The support platform 11 has at least two protrusions 13 relative to the contact module 2, and a first mounting part is provided on the protrusion 13, which can be fixedly installed on the assembly or wall.

[0043] Preferred, such as Figure 4 and Figure 5 As shown, the contact support 3 includes a linkage part 31 and a mounting platform 32. The mounting platform 32 is installed inside the first module housing and is connected to the linkage part 31. The moving contact is installed on the mounting platform 32, and the linkage part 31 is located outside the first module housing. Figure 5 A schematic diagram of the contact support 3 of this utility model is shown.

[0044] Furthermore, the contact support 3 is internally equipped with a reset element. This reset element drives the contact support 3 to move the moving contact in a direction that separates from or contacts the stationary contact 4 (normally open or normally closed contact). Alternatively, the reset element can be understood as driving the contact support 3 to move closer to or further away from the electromagnetic system, causing the linkage 31 to fit tightly against the first module housing. When the power supply to the electromagnetic system coil is disconnected, the stationary iron core no longer attracts the moving iron core. Driven by the reset element, the contact support 3 resets the support base 12, causing the moving contact and stationary contact 4 to separate or contact, thus disconnecting or connecting the load to the power supply.

[0045] Furthermore, in one possible implementation, the contact support 3 may have a receiving cavity inside, with the opening of the receiving cavity facing away from the linkage part 31. The reset part is disposed in the receiving cavity, with one end of the reset part connected to the bottom wall of the receiving cavity and the other end connected to the first module housing. Preferably, the reset part is a tension spring or a compression spring. In this embodiment, the reset part is a tension spring. The tension force generated by the tension spring makes the contact support 3 have potential energy away from the electromagnetic system, and the linkage part 31 of the contact support 3 abuts against the first module housing. When the reset part is a compression spring, the thrust generated by the compression spring makes the contact support 3 have energy release close to the electromagnetic system.

[0046] Furthermore, such as Figure 7 As shown, a second through hole 23 is provided on the first module housing. The cross-section of the mounting platform 32 is consistent with the shape of the second through hole 23, allowing the mounting platform 32 to pass through and move within the second through hole 23. Furthermore, the dimensions of the mounting platform 32 match the dimensions of the second through hole 23, allowing the mounting platform 32 to slide within the second through hole 23 while preventing dust from entering. Further, as... Figure 5 As shown, the second through hole 23 and the mounting platform 32 are both square structures.

[0047] Furthermore, such as Figure 5As shown, the linkage part 31 includes two first retaining walls, a first retaining groove 35 is formed between the two first retaining walls, the two first retaining walls protrude from the mounting platform 32, and one of the first retaining walls near the mounting platform 32 abuts against the first module housing.

[0048] Furthermore, the linkage part 31 includes first slots 35 disposed opposite to each other, and each first slot 35 forms the first card wall.

[0049] Furthermore, the first module housing includes a first module base 21 and a first module cover 22. The first module cover 22 covers the first module base 21. The contact support 3, the moving contact and the stationary contact 4 are disposed on the first module base 21. The first module base 21 and the first module cover 22 can be fixed by multiple screws, as shown in this embodiment, or they can be fixed by snap-fit ​​installation.

[0050] Furthermore, such as Figure 3 As shown, the support base 12 faces the contact module 2. The support base 12 has a mounting groove 121 on one side opposite the linkage part 31. The mounting groove 121 extends along the thickness direction of the contact module 2 to both sides of the support base 12. The linkage part 31 can be partially installed in the mounting groove 121.

[0051] Furthermore, the linkage 31 is installed in the mounting groove 121 of the support base 12 from one side along the thickness direction of the contact module 2.

[0052] Furthermore, such as Figure 3 and Figure 5 As shown, the support base 12 is provided with a first buckle 122, which cooperates with the first slot 35 on the linkage part 31. The support base 12 and the linkage part 31 are fixed by the first buckle 122 and the first slot 35. Furthermore, the first buckle 122 is two barbs that extend from both sides of the mounting groove 121 toward the center of the mounting groove 121 on the side of the support base 12 facing the linkage part 31. The first slot 35 is two parallel first locking walls that extend to both sides toward the center of the linkage part 31. The first slot 35 is formed between the two first locking walls. The first buckle 122 is installed in the first slot 35 to realize buckle installation.

[0053] Preferably, the support base 12 can be made of aluminum alloy profile. Aluminum alloy profiles are sturdy and easy to process, requiring only cutting and drilling according to specified dimensions, thereby reducing mold opening costs and cycle time, and are also recyclable. The support base 12 can also be made of plastic to improve insulation performance; the contact support 3 can be made of insulating material to improve insulation protection performance.

[0054] Furthermore, such as Figure 5As shown, the linkage part 31 is provided with a first elastic element 33 on the side facing the support base 12. The linkage part 31 is installed in the mounting groove 121 of the support base 12. The first elastic element 33 is located between the linkage part 31 and the support base 12. The elasticity of the first elastic element 33 presses and fixes the contact module 2 and the support base 12.

[0055] Furthermore, such as Figures 3-5 As shown, the support base 12 is provided with a guide protrusion 123, which extends along the thickness direction of the contact module 2. The side of the linkage part 31 facing the support base 12 is provided with a guide groove 34. The guide protrusion 123 is installed in the guide groove 34. The guide protrusion 123 and the guide groove 34 cooperate to guide the movement of the linkage part 31 in the support base 12, so that the linkage part 31 can move stably and avoid the linkage part 31 and the support base 12 from being offset or deflected and getting stuck. In this embodiment, two first elastic members 33 are arranged in parallel on the linkage part 31, and the guide groove 34 is arranged between the two first elastic members 33, and the guide groove 34 is parallel to the first elastic members 33.

[0056] Furthermore, the first elastic element 33 is a metal sheet, with its two ends bent towards each other to form a second barb. The middle part of the first elastic sheet protrudes towards the support base 12. The linkage part 31 is provided with a second slot that mates with the second barb. The first elastic element 33 is mounted on the linkage part 31 via the second barb. In other embodiments, the first elastic element 33 is a flat plate structure. The side of the linkage part 31 facing the support base 12 has two grooves facing each other along the thickness direction of the contact module 2. The two ends of the first elastic element 33 are bent towards each other and inserted into the two grooves.

[0057] Preferably, the cross-sectional shape of the guide protrusion 123 can be arc-shaped.

[0058] Preferably, in other possible embodiments, the linkage part 31 is provided on the support base 12 protruding towards the contact module 2, and the mounting groove 121 is recessed in the direction facing the support base 12. The linkage part 31 and the mounting groove 121 are installed together. All of these are within the protection scope of this application.

[0059] Furthermore, such as Figure 4 As shown, a contact module 2 includes two stationary contacts 4, which are respectively disposed on both sides of the contact support 3. The stationary contacts 4 are partially disposed inside the contact module 2 and partially protrude from the first module housing. The part protruding from the first module housing serves as a wiring terminal 41 for connecting external leads. The wiring terminal 41 is provided with a wiring hole. The stationary contacts 4 disposed inside the contact module 2 are provided with stationary contact points, which cooperate with the moving contact points on the moving contact.

[0060] The moving contact is mounted on a contact support, and a contact spring is provided between the moving contact and the contact support. The moving contact has moving points at both ends, which respectively mate with two stationary contacts 4. The mounting platform 32 of the contact support may have mounting holes through which the moving contact passes, and the contact spring is placed in the mounting holes to fix the moving contact. Alternatively, the moving contact can also be connected to the contact support using other fittings.

[0061] Preferred, such as Figure 1 As shown, the contactor is a 3P contactor. Three contact modules 2 are installed side by side on the support base 12. The three contact modules 2 can be connected in a three-phase circuit, respectively connected in series in the L1 pole line, L2 pole line and L3 pole line, or they can be connected in series in three circuits to control three different circuits at the same time.

[0062] Furthermore, the support platform 11 has two protrusions 13 spaced apart on both sides along the height direction of the contact module 2. The protrusions 13 are provided with a first mounting part, which includes a first mounting hole and a mounting screw. There is a gap between the terminals 41 of adjacent contact modules 2. The gap between the first mounting part and the adjacent terminals 41 corresponds to the gap. The mounting screw can pass through the first mounting hole and the gap and be installed on the wall or assembly.

[0063] Preferred, such as Figure 6 As shown, the contactor is a 4P contactor. Four contact modules 2 are mounted side by side on the support base 12. The four contact modules 2 can be connected in series in four circuits to control four different circuits at the same time. Alternatively, the four contact modules 2 can be connected in a three-phase four-wire circuit, with three being phase pole units and one being a neutral pole unit.

[0064] Furthermore, the support platform 11 has three protrusions 13 spaced apart on both sides along the height direction of the contact module 2. Each protrusion 13 has a first mounting part. There is a gap between the terminals 41 of adjacent contact modules 2. The gap between the first mounting part and the adjacent terminal 41 corresponds to the gap. The mounting screw can pass through the first mounting hole and the gap to be mounted on the wall or assembly.

[0065] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used during use. They are only for ease of description and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating relative importance.

[0066] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A contact system, characterized in that, It includes at least two contact modules (2) and a support base (12). The contact module (2) includes a first module housing and a moving contact, a stationary contact (4) and a contact support (3) disposed in the first module housing. The contact support (3) is movably disposed in the first module housing. The moving contact is disposed on the contact support (3). The contact support (3) can move relative to the first module housing to drive the moving contact to contact the stationary contact (4). The contact support (3) is provided with a linkage part (31) extending out of the first module housing. At least two of the contact modules (2) are arranged side by side. The support base (12) is fixedly connected to the linkage part (31) of at least two contact modules (2).

2. The contact system according to claim 1, characterized in that, The support base (12) is connected to a support platform (11), the support platform (11) is provided with a first through hole (15), and the support base (12) is slidably disposed in the first through hole (15).

3. The contact system according to claim 1, characterized in that, The contact support (3) includes a mounting platform (32) connected to the linkage part (31). The mounting platform (32) is installed inside the first module housing, and the moving contact is fixedly installed on the mounting platform (32).

4. The contact system according to claim 1, characterized in that, The support base (12) has a mounting groove (121) on one side opposite to the linkage part (31). The mounting groove (121) extends along the thickness direction of the contact module (2) to both sides of the support base (12). The linkage part (31) is at least partially installed in the mounting groove (121).

5. The contact system according to claim 1, characterized in that, The contact support (3) is connected to the reset member, and the reset member drives the contact support (3) to move the moving contact in the direction of separation or contact with the stationary contact (4).

6. The contact system according to claim 5, characterized in that, The contact support has an internal cavity, the opening of which faces away from the linkage part (31). The reset member is at least partially disposed in the cavity, one end of which is connected to the bottom wall of the cavity and the other end of which is connected to the inner wall of the first module housing.

7. The contact system according to claim 3, characterized in that, The first module housing has a second through hole (23), and the cross-section of the mounting platform (32) is consistent with the shape of the second through hole (23); the linkage part (31) includes two first retaining walls, a first retaining groove (35) is formed between the two first retaining walls, the two first retaining walls protrude from the mounting platform (32), and the first retaining wall near the mounting platform (32) abuts against the first module housing.

8. The contact system according to claim 1 or 7, characterized in that, The linkage part (31) includes two first card walls, and a first card groove (35) is formed between the two first card walls. The support seat (12) is provided with a first buckle (122). The support seat (12) and the linkage part (31) are fixed by the first buckle (122) and the first card groove (35).

9. The contact system according to claim 1, characterized in that, The first module housing includes a first module base (21) and a first module cover (22). The contact support (3), moving contact and stationary contact (4) are disposed on the first module base (21), and the first module cover (22) covers the first module base (21).

10. The contact system according to claim 4, characterized in that, The linkage part (31) is provided with at least one first elastic element (33) on the side facing the support base (12). The first elastic element (33) is located between the linkage part (31) and the support base (12). The elasticity of the first elastic element (33) presses and fixes the contact module (2) and the support base (12).

11. The contact system according to claim 10, characterized in that, The linkage part (31) has two first elastic elements (33) on the side facing the support base (12). A guide groove (34) is provided between the two first elastic elements (33). The guide groove (34) and the two first elastic elements (33) are parallel to each other. A guide protrusion (123) that cooperates with the guide groove (34) is provided in the mounting groove (121) of the support base (12). The two ends of the guide protrusion (123) extend to both sides of the support base (12) along the thickness direction of the contact module (2).

12. The contact system according to claim 10, characterized in that, The first elastic element (33) is a metal sheet. The two ends of the first elastic element (33) are bent towards each other to form a second barb. The linkage part (31) is provided with a second slot that cooperates with the second barb. The first elastic element (33) is installed on the linkage part (31) through the second barb. The first elastic element (33) is a flat plate structure. The side of the linkage part (31) facing the support base (12) is provided with two grooves facing each other along the thickness direction of the contact module (2). The two ends of the first elastic element (33) are bent towards each other and inserted into the two grooves.

13. A contactor, characterized in that, Includes the contact system described in any one of claims 1-12.

14. The contactor according to claim 13, characterized in that, It also includes an electromagnetic system, which includes a second module housing and a moving iron core. The second module housing is provided with a coil and a stationary iron core. The moving iron core is provided on the support base (12). The contact system is provided with a support platform (11) that is fixedly connected to the first module housing of at least two contact modules (2). The support platform (11) and the second module housing are fixedly installed.

15. The contactor according to claim 13, characterized in that, It also includes an electromagnetic system and a contactor housing. The electromagnetic system includes a coil, a stationary iron core and a moving iron core. The stationary iron core is at least partially installed inside the coil, and the moving iron core is disposed on the support base (12). The electromagnetic system and the contact system are disposed inside the contactor housing.

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