Surge assembly and contactor

Abstract

The utility model belongs to the technical field of low-voltage electric appliances, and discloses a surge assembly and a contactor, the surge assembly comprises a circuit board, two elastic sheet terminals and a surge piece, the number of the elastic sheet terminals is two, each elastic sheet terminal comprises a fixed part and a connecting part which are connected with each other, and the fixed part is fixed on the circuit board; the surge piece is provided with two pins, the two pins are fixed on the circuit board, and the two pins are electrically connected with the two elastic piece terminals in a one-to-one correspondence mode through the circuit board. According to the surge assembly provided by the utility model, even if the surge assembly encounters impact vibration, the elastic piece terminal can enable the connecting part to always keep abutting against the wiring terminal through the elastic deformation of the elastic piece terminal, and stable and reliable conduction between the surge piece and the wiring terminal is ensured.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, and in particular to a surge device and contactor. Background Technology

[0002] Existing AC contactors are susceptible to damage from spike currents or voltages. Therefore, surge protectors are usually installed on AC contactors. When a spike current or voltage is suddenly generated in the circuit of the AC contactor due to external interference, the surge protector can conduct and shunt the current in a very short time, thereby preventing the surge from damaging the coil in the circuit.

[0003] In related technologies, the surge protector and terminals inside the contactor are usually rigidly connected. In applications with high impact and vibration, the surge protector may disconnect from the terminals, affecting the surge protector's protection function for the coil and consequently affecting the contactor's operating performance. Utility Model Content

[0004] One objective of this invention is to provide a surge assembly that effectively ensures stable and reliable conduction between the surge element and the terminal block.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A surge component is provided, comprising:

[0007] Circuit board,

[0008] Two spring-loaded terminals, each spring-loaded terminal comprising a fixing part and a connecting part connected to each other, the fixing part being fixed to the circuit board, and the connecting part being used to abut against the wiring terminal;

[0009] A surge device having two pins, the two pins being fixed to the circuit board, and the two pins being electrically connected to two spring terminals one-to-one through the circuit board.

[0010] Optionally, the circuit board is provided with two first solder holes, and the two first solder holes are respectively provided with the two spring terminals. The fixing part includes a first fixing piece and a second fixing piece arranged at an angle. The first fixing piece passes through the corresponding first solder hole and is soldered to the circuit board, and the second fixing piece is attached to the circuit board.

[0011] Optionally, the circuit board is further provided with two second solder holes, which are respectively provided with two spring terminals. The projection of the second solder hole along the direction perpendicular to the second fixing piece is located on the second fixing piece, and the second fixing piece is soldered to the circuit board at the second solder hole.

[0012] Optionally, the outer periphery of the circuit board is provided with protrusions and / or grooves.

[0013] Another objective of this utility model is to provide a contactor, comprising:

[0014] shell:

[0015] Two wiring terminals are located inside the housing;

[0016] The surge assembly described above is located inside the housing, and the connection portion of the two spring terminals of the surge assembly corresponds to and abuts against the two wiring terminals.

[0017] Optionally, the circuit board of the surge assembly includes two opposing limiting edges, and the housing includes:

[0018] The base has a first limiting groove, and one of the two limiting sides is inserted into the first limiting groove;

[0019] The upper cover is provided on the base, and the upper cover is provided with a second limiting groove, and the other of the two limiting sides is inserted into the second limiting groove.

[0020] Optionally, the upper cover is provided with a limiting surface, and the wiring terminal includes an abutment plate, the first side of the abutment plate abutting against the corresponding connecting part, and the second side of the abutment plate abutting against the limiting surface.

[0021] Optionally, the upper cover includes:

[0022] A main cover is disposed on the base, and the main cover is provided with mounting holes and the limiting surface;

[0023] A secondary cover is provided on the mounting hole, and the second limiting groove is provided on the secondary cover.

[0024] Optionally, the base is provided with a limiting component, the limiting component includes two first limiting blocks spaced apart along a first direction, a first limiting groove is formed between the two first limiting blocks, and the two terminals are spaced apart along a second direction, the terminals include limiting plates, and the circuit board of the surge assembly is sandwiched between the limiting plates of the two terminals.

[0025] And / or, the upper cover is provided with two second limiting blocks spaced apart along the second direction, and each of the two second limiting blocks is provided with a second limiting groove on the side facing each other, and the second limiting groove passes through the side of the second limiting block facing the base.

[0026] Optionally, the housing is provided with a limiting rib, which is inserted into a groove on the circuit board of the surge assembly.

[0027] Optionally, the terminal block is provided with a welding notch.

[0028] Beneficial effects: The surge assembly provided by this utility model has two pins of the surge element electrically connected to two corresponding spring terminals via a circuit board. Even when subjected to impact vibration, the spring terminals can maintain the connection between the surge element and the terminal block through their own elastic deformation, thus ensuring stable and reliable conduction between the surge element and the terminal block. Furthermore, fixing the fixing part and the pins of the surge element to the circuit board ensures stability and reliability.

[0029] The contactor provided by this utility model effectively ensures stable and reliable conduction between the surge element and the terminal block through the setting of the surge assembly. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the surge assembly provided by this utility model;

[0031] Figure 2 This is a schematic diagram of the surge assembly with terminals provided by this utility model;

[0032] Figure 3 This is a schematic diagram of the circuit board structure provided by this utility model;

[0033] Figure 4 This is a structural schematic diagram of the surge device provided by this utility model;

[0034] Figure 5 This is a schematic diagram of the structure of the spring-loaded terminal provided by this utility model;

[0035] Figure 6 This is an exploded structural diagram of the contactor provided by this utility model;

[0036] Figure 7 This is a schematic diagram of the structure of the base provided by this utility model;

[0037] Figure 8 This is a schematic diagram of the structure of the secondary cover provided by this utility model;

[0038] Figure 9 This is a schematic diagram showing the connection relationship between the main cover and the surge assembly provided by this utility model;

[0039] Figure 10 This is a schematic diagram of the structure of the wiring terminal provided by this utility model;

[0040] Figure 11 This is a schematic diagram showing the connection relationship between the base and the surge assembly provided by this utility model;

[0041] Figure 12 This is a schematic diagram showing the connection relationship between the sub-cover and the surge assembly provided by this utility model.

[0042] In the picture:

[0043] 100. Circuit board; 101. Clearance hole; 102. First solder hole; 103. Second solder hole; 104. Third solder hole; 105. Fourth solder hole; 106. Groove; 110. Limiting edge;

[0044] 200, spring-loaded terminal; 210, fixing part; 211, first fixing piece; 212, second fixing piece; 220, connecting part;

[0045] 300. Surge component; 310. Pin; 320. Surge body;

[0046] 400. Terminal block; 401. Welding notch; 410. Abutment plate; 420. Limiting plate; 430. Wiring block; 440. Extension plate;

[0047] 500, Outer shell; 501, Limiting rib; 510, Base; 5101, First limiting groove; 511, Limiting assembly; 5111, First limiting block; 520, Top cover; 5201, Second limiting groove; 521, Main cover; 5211, Limiting surface; 5212, Mounting hole; 522, Secondary cover; 5221, Inverted buckle; 5222, Second limiting block; 5223, Limiting rib. Detailed Implementation

[0048] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0049] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0050] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0051] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0052] Reference Figures 1 to 5 As shown, this embodiment provides a surge assembly, which includes a circuit board 100, a spring terminal 200, and a surge element 300.

[0053] Specifically, two spring terminals 200 are provided. Each spring terminal 200 includes a fixing part 210 and a connecting part 220 connected to each other. The fixing part 210 is fixed to the circuit board 100, and the connecting part 220 is used to abut against the terminal 400. It is understood that the spring terminal 200 is composed of an elastic sheet. When the connecting part 220 abuts against the terminal 400, the spring terminal 200, relying on its own elastic potential energy, causes the connecting part 220 to tend to bend towards the terminal 400. The terminal 400 can be a contactor terminal or a conductive component of other low-voltage electrical appliances; this embodiment is not limited to any particular type.

[0054] Specifically, the surge device 300 has two pins 310, which are fixed on the circuit board 100, and the two pins 310 are electrically connected to two spring terminals 200 one-to-one through the circuit board 100.

[0055] In this embodiment, the two pins 310 of the surge element 300 are electrically connected to the two spring terminals 200 one-to-one through the circuit board 100. Even when subjected to impact vibration, the spring terminals 200 can maintain the connection portion 220 against the terminal 400 through their own elastic deformation, thus ensuring stable and reliable conduction between the surge element 300 and the terminal 400. In addition, the fixing portion 210 and the pins 310 of the surge element 300 are fixed on the circuit board 100, ensuring stability and reliability.

[0056] For example, the circuit board 100 can be rectangular to ensure a compact structure for the surge assembly.

[0057] For example, the length direction of the surge element 300 is set at an angle to the length direction of the circuit board 100, which can reduce the size of the circuit board 100 to ensure the compact structure of the surge assembly.

[0058] For example, two spring terminals 200 are respectively disposed on both sides of the circuit board 100 along the length direction.

[0059] For example, the circuit board 100 is provided with a clearance hole 101, and the surge device 300 also includes a surge body 320 connected to the pin 310. Part of the surge body 320 is located in the clearance hole 101 to ensure that the surge device has a compact structure.

[0060] For example, the shape of the connecting portion 220 of the spring terminal 200 includes, but is not limited to, an arc shape or an angle shape.

[0061] In this embodiment, reference is made to Figure 1 , Figure 3 and Figure 5 As shown, the fixing part 210 can be fixed to the circuit board 100 by welding.

[0062] In one feasible embodiment, the circuit board 100 is provided with two first solder holes 102, which are respectively provided with two spring contact terminals 200. The fixing part 210 includes a first fixing piece 211 and a second fixing piece 212 arranged at an included angle. The first fixing piece 211 passes through the corresponding first solder hole 102 and is soldered to the circuit board 100 to ensure a stable and reliable connection between the spring contact terminal 200 and the circuit board 100. The second fixing piece 212 is attached to the circuit board 100. It can be understood that the force between the second fixing piece 212 and the circuit board 100 can give the spring contact terminal 200 itself a large elastic potential energy, effectively ensuring a stable and reliable contact between the connection part 220 and the terminal 400.

[0063] For example, the connecting part 220 can be bent into shape by the second fixing piece 212 toward the side away from the circuit board 100, which has a compact structure and effectively ensures that the connecting part 220 and the terminal block 400 are in stable and reliable contact.

[0064] For example, the first fixing piece 211 and the second fixing piece 212 are perpendicular to each other.

[0065] In one feasible embodiment, the circuit board 100 is further provided with two second solder holes 103, which are respectively provided with two spring terminals 200. The projection of the second solder holes 103 along the direction perpendicular to the second fixing plate 212 is located on the second fixing plate 212, and the second fixing plate 212 is soldered to the circuit board 100 at the second solder holes 103, so as to further ensure that the connection between the fixing part 210 and the circuit board 100 is stable and reliable.

[0066] Of course, the fixing part 210 can also be fixed to the circuit board 100 in other ways, such as by tightening with bolts, but this embodiment does not limit it.

[0067] In this embodiment, reference is made to Figure 1 , Figure 3 and Figure 4 As shown, the pins 310 of the surge device 300 can be fixed to the circuit board 100 by soldering. Specifically, the circuit board 100 is provided with a third solder hole 104 and a fourth solder hole 105. One of the two pins 310 passes through the third solder hole 104 and is soldered to the circuit board 100, while the other passes through the fourth solder hole 105 and is soldered to the circuit board 100. This facilitates soldering and ensures a stable and reliable connection. Of course, the pins 310 of the surge device 300 can also be fixed to the circuit board 100 in other ways, such as by bolt tightening, which is not limited in this embodiment.

[0068] For example, at least one third solder hole and at least one fourth solder hole 105 are provided. It is understood that one of the two pins 310 passes through one of the third solder holes 104 and the other passes through one of the fourth solder holes 105 to accommodate surge elements 300 of different sizes.

[0069] In some embodiments, the outer periphery of the circuit board 100 is provided with a protrusion (not shown), which can limit the positioning of the circuit board 100 by engaging with the housing 500 of a low-voltage electrical appliance such as a contactor. In other embodiments, such as Figure 3 As shown, the outer periphery of the circuit board 100 is provided with a groove 106, which can limit the positioning of the circuit board 100 with the housing 500 of low-voltage electrical appliances such as contactors, so as to realize the positioning and assembly of the circuit board 100. In a feasible embodiment, the outer periphery of the circuit board 100 is provided with both a protrusion and a groove 106.

[0070] Reference Figures 6 to 12 As shown, this embodiment also provides a contactor, which includes a housing 500, a terminal block 400, and the surge assembly described above.

[0071] Specifically, there are two terminals 400 located inside the housing 500, and the surge assembly is located inside the housing 500. The connection portion 220 of the two spring terminals 200 of the surge assembly corresponds to and abuts against the two terminals 400.

[0072] In this embodiment, the contactor, through the setting of the surge assembly, can effectively ensure stable and reliable conduction between the surge element 300 and the terminal block 400.

[0073] In this embodiment, reference is made to Figure 3 , Figures 6 to 8 As shown, the circuit board 100 of the surge assembly includes two opposing limiting edges 110, and the housing 500 includes a base 510 and a top cover 520. The base 510 has a first limiting groove 5101, into which one of the two limiting edges 110 is inserted. The top cover 520 is disposed on the base 510 and has a second limiting groove 5201, into which the other of the two limiting edges 110 is inserted. It is understood that a mounting cavity is formed between the base 510 and the top cover 520 to accommodate the terminal block 400 and the surge assembly. In this embodiment, when assembling the surge assembly within the housing 500, one of the two limiting edges 110 of the circuit board 100 can be first inserted into the first limiting groove 5101. Then, the top cover 520 is placed on the base 510, and the other of the two limiting edges 110 of the circuit board 100 is inserted into the second limiting groove 5201, facilitating assembly. Furthermore, inserting one of the two limiting edges 110 into the first limiting groove 5101 and the other into the second limiting groove 5201 ensures stable and reliable positioning and assembly of the surge assembly relative to the housing 500.

[0074] For example, when the circuit board 100 is set as a rectangle, the two limiting sides 110 can be the long sides of the circuit board 100.

[0075] For example, at least one of the first limiting groove 5101 and the second limiting groove 5201 is provided with a limiting rib 5223 on the groove wall. The limiting rib 5223 can abut against the circuit board 100 to effectively prevent the circuit board 100 from shaking relative to the outer casing 500.

[0076] In this embodiment, reference is made to Figure 6 , Figures 8 to 10As shown, the upper cover 520 is provided with a limiting surface 5211, and the terminal block 400 includes an abutment plate 410. The first side of the abutment plate 410 abuts against the corresponding connecting part 220, and the second side of the abutment plate 410 abuts against the limiting surface 5211. When the contactor is de-energized, the force generated by the reverse electromotive force will cause the abutment plate 410 to tend to move away from the connecting part 220, while the limiting surface 5211 can prevent the abutment plate 410 from moving away from the connecting part 220, effectively ensuring stable and reliable contact between the abutment plate 410 and the connecting part 220.

[0077] For example, the top cover 520 is provided with two limiting surfaces 5211, and the two limiting surfaces 5211 are configured to correspond one-to-one with the two abutment plates 410.

[0078] In one feasible implementation, the upper cover 520 includes a main cover 521 and a secondary cover 522. The main cover 521 is disposed on the base 510 and has a mounting hole 5212 and a limiting surface 5211. The secondary cover 522 is disposed on the mounting hole 5212, and a second limiting groove 5201 is disposed on the secondary cover 522. In this embodiment, after one of the two limiting edges 110 of the circuit board 100 is inserted into the first limiting groove 5101, the main cover 521 can be placed on the base 510 first, so that the limiting surface 5211 abuts against the second side of the abutment plate 410; then the secondary cover 522 is placed on the mounting hole 5212, so that the other of the two limiting edges 110 of the circuit board 100 is inserted into the second limiting groove 5201. Compared to the one-piece molded top cover 520, the split design of the top cover 520 can effectively prevent assembly failure due to misalignment between the limiting surface 5211 and the abutment plate 410, or misalignment between the circuit board 100 and the second limiting groove 5201, thus facilitating assembly.

[0079] For example, the secondary cover 522 is snapped onto the mounting hole 5212 of the main cover 521. Specifically, the secondary cover 522 has a plurality of buckles 5221 spaced apart along the circumference, and the mounting hole 5212 has a plurality of slots (not shown), with the buckles 5221 and the slots corresponding to each other. Of course, the cover can also be installed on the main cover 521 in other ways, such as bolt fastening, which is not limited in this embodiment.

[0080] In some embodiments, refer to Figure 7 , Figure 10 and Figure 11As shown, a limiting component 511 is provided on the base 510. The limiting component 511 includes two first limiting blocks 5111 spaced apart along a first direction, with a first limiting groove 5101 formed between the two first limiting blocks 5111. Two terminals 400 are spaced apart along a second direction, and each terminal 400 includes a limiting plate 420. The circuit board 100 is sandwiched between the limiting plates 420 of the two terminals 400. That is, a limiting fit is formed between the circuit board 100 and the limiting component 511 along the first direction, and a limiting fit is formed between the circuit board 100 and the terminals 400 along the second direction, realizing the positioning and assembly of the circuit board 100 relative to the base 510. The setting of the limiting component 511 facilitates the forming of the base 510. The first direction can be the width direction of the contactor.

[0081] For example, at least one limiting component 511 is provided, such as two spaced apart along the second direction, that is, the two limiting components 511 correspond one-to-one with the two sides of the circuit board 100 along the second direction. It is understood that, in order to prevent positional interference between the limiting component 511 and the spring terminal 200, the two first limiting blocks 5111 in the same group have different shapes. The second direction is perpendicular to the first direction, and the second direction can be the length direction of the contactor.

[0082] Of course, the number of first limiting grooves 5101 can be other numbers, and the first limiting grooves 5101 can also be formed in other ways. This embodiment does not limit them.

[0083] It is understandable that the top cover 520 is mounted on the base 510 along a third direction, with the first direction, the second direction and the third direction being perpendicular to each other, and the third direction being the depth direction of the contactor.

[0084] For example, the limiting plate 420 and the abutment plate 410 are connected and set at an angle, for example, the limiting plate 420 and the abutment plate 410 are perpendicular to each other. The abutment plate 410 is located on one side of the limiting plate 420 along the first direction, and the abutment plate 410 is formed by bending the limiting plate 420 toward the circuit board 100.

[0085] For example, the terminal block 400 also includes a terminal block 430, through which the terminal block 400 can be electrically connected to an external circuit. The terminal block 430 is located on the side of the limiting plate 420 facing the base 510, and the terminal block 430 is formed by bending the limiting plate 420 toward the side away from the circuit board 100.

[0086] For example, the terminal block 400 further includes an extension plate 440 connected to the terminal block 430, and the contactor also includes a coil (not shown), with the extension plate 440 electrically connected to the coil. The extension plate 440 is located on one side of the terminal block 430 along a first direction, and is formed by bending the terminal block 430 toward the base 510.

[0087] In some embodiments, refer to Figure 8 and Figure 12 As shown, the upper cover 520 is provided with two second limiting blocks 5222 spaced apart along the second direction. Each of the two second limiting blocks 5222 has a second limiting groove 5201 on its side facing each other, and the second limiting groove 5201 penetrates the side of the second limiting block 5222 facing the base 510. Specifically, the second limiting blocks 5222 are located on the main cover 521. In this embodiment, the positioning and assembly of the circuit board 100 relative to the upper cover 520 can be achieved through the second limiting grooves 5201 on the two second limiting blocks 5222. Furthermore, the arrangement of the two second limiting blocks 5222 facilitates the forming of the upper cover 520 and effectively prevents positional interference between the second limiting blocks 5222 and the surge protector 300.

[0088] Of course, the number of second limiting grooves 5201 can be other numbers, and the second limiting grooves 5201 can also be formed in other ways. This embodiment does not limit them.

[0089] In some embodiments, refer to Figure 3 and Figure 8 As shown, taking the circuit board 100 with a groove 106 on its outer periphery as an example, the outer shell 500 is provided with a limiting rib 501, which is inserted into the groove 106 to achieve positioning and assembly of the circuit board 100 and the upper cover 520, effectively preventing the circuit board 100 from shaking relative to the outer shell 500. Exemplarily, the limiting rib 501 can be provided on the groove wall of the second limiting groove 5201. Exemplarily, at least one of the two second limiting blocks 5222 has a limiting rib 501 on the groove wall of the second limiting groove 5201.

[0090] In some embodiments, taking the circuit board 100 having a protrusion on its outer periphery as an example, the outer casing 500 has an opening groove (not shown), and the protrusion is inserted into the opening groove to realize the positioning and assembly of the circuit board 100 and the upper cover 520, effectively preventing the circuit board 100 from shaking relative to the outer casing 500. For example, the opening groove can be provided on the groove wall of the second limiting groove 5201.

[0091] In one feasible implementation, such as Figure 10As shown, the terminal block 400 is provided with a soldering notch 401. When the contactor does not include the circuit board 100 and spring terminal 200 in the surge assembly, that is, when the contactor only includes the surge element 300 in the surge assembly, the pins 310 of the surge element 300 can be soldered to the corresponding soldering notch 401 of the terminal block 400 to improve applicability.

[0092] For example, a welding notch 401 is provided on the abutment plate 410 of the terminal block 400.

[0093] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A surge assembly, characterized in that, include: Circuit board (100), Two spring-loaded terminals (200) are provided, each spring-loaded terminal (200) including a fixing part (210) and a connecting part (220) connected to each other. The fixing part (210) is fixed on the circuit board (100), and the connecting part (220) is used to abut against the terminal block (400). A surge element (300) has two pins (310), which are fixed on the circuit board (100) and electrically connected to two spring terminals (200) one-to-one through the circuit board (100).

2. The surge assembly according to claim 1, characterized in that, The circuit board (100) is provided with two first solder holes (102), and the two first solder holes (102) are respectively provided with two spring terminals (200). The fixing part (210) includes a first fixing piece (211) and a second fixing piece (212) arranged at an angle. The first fixing piece (211) passes through the corresponding first solder hole (102) and is soldered to the circuit board (100). The second fixing piece (212) is attached to the circuit board (100).

3. The surge assembly according to claim 2, characterized in that, The circuit board (100) is also provided with two second solder holes (103), and the two second solder holes (103) are respectively provided with two spring terminals (200). The projection of the second solder hole (103) along the direction perpendicular to the second fixing piece (212) is located on the second fixing piece (212), and the second fixing piece (212) is soldered to the circuit board (100) at the second solder hole (103).

4. The surge assembly according to claim 1, characterized in that, The circuit board (100) has protrusions and / or grooves (106) on its outer periphery.

5. A contactor, characterized in that, include: Casing (500): Two wiring terminals (400) are located inside the housing (500); The surge assembly as described in any one of claims 1-4 is disposed within the housing (500), and the connection portion (220) of the two spring terminals (200) of the surge assembly abuts against the two terminals (400) in a one-to-one correspondence.

6. The contactor according to claim 5, characterized in that, The circuit board (100) of the surge assembly includes two opposing limiting edges (110), and the housing (500) includes: A base (510) is provided with a first limiting groove (5101), and one of the two limiting edges (110) is inserted into the first limiting groove (5101). The upper cover (520) is provided on the base (510), and the upper cover (520) is provided with a second limiting groove (5201), and the other of the two limiting edges (110) is inserted into the second limiting groove (5201).

7. The contactor according to claim 6, characterized in that, The upper cover (520) is provided with a limiting surface (5211), and the terminal block (400) includes an abutment plate (410). The first side of the abutment plate (410) abuts against the corresponding connecting part (220), and the second side of the abutment plate (410) abuts against the limiting surface (5211).

8. The contactor according to claim 7, characterized in that, The upper cover (520) includes: The main cover (521) is disposed on the base (510), and the main cover (521) is provided with mounting holes (5212) and limiting surfaces (5211); A secondary cover (522) is provided on the mounting hole (5212), and a second limiting groove (5201) is provided on the secondary cover (522).

9. The contactor according to claim 6, characterized in that, The base (510) is provided with a limiting component (511), the limiting component (511) includes two first limiting blocks (5111) spaced apart along a first direction, a first limiting groove (5101) is formed between the two first limiting blocks (5111), and two terminals (400) are spaced apart along a second direction. Each terminal (400) includes a limiting plate (420), and the circuit board (100) of the surge assembly is sandwiched between the limiting plates (420) of the two terminals (400). And / or, the upper cover (520) is provided with two second limiting blocks (5222) spaced apart along the second direction, and each of the two second limiting blocks (5222) is provided with a second limiting groove (5201) on the side facing each other, and the second limiting groove (5201) passes through the side of the second limiting block (5222) facing the base (510).

10. The contactor according to claim 5, characterized in that, The outer casing (500) is provided with a limiting rib (501), which is inserted into a groove (106) on the circuit board (100) of the surge assembly.

11. The contactor according to claim 5, characterized in that, The terminal block (400) is provided with a welding notch (401).

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