Wire-to-board connector, connector module and electrical equipment

Abstract

The utility model relates to the technical field of connectors, in particular to a wire-to-board connector, a connector module and electrical equipment. The wire-to-board connector includes a terminal and an elastic coupling member. The terminal is suitable for being connected to a circuit board, the terminal is provided with an installation through hole, the installation through hole penetrates through the two ends of the terminal, and a first insertion port and a second insertion port for insertion and extraction of the contact pin are formed in the two ends of the installation through hole respectively. And the elastic coupling piece is accommodated in the mounting through hole and is in contact with the terminal, and the elastic coupling piece is used for clamping the contact pin. The wire-to-board connector is small in occupied space.

Description

Technical Field

[0001] The present application relates to the field of connector technology, and in particular to a wire-to-board connector, a connector module, and an electrical device. Background Art

[0002] Connectors are electrical connectors used to transmit power and communication signals. Wire-to-board connectors are a very important type of connector, which has a high market share. They are connectors that connect wires to circuit boards. Wire-to-board connectors are developing very rapidly, with more and more types and wider applications.

[0003] The current plastic shell connectors are relatively large in size. When electrically connected to the conductive traces on the surface of the circuit board, the connectors are arranged on the surface of the circuit board, requiring a large plug-in and layout space. The above space occupation is not conducive to the layout of devices with high heights on the printed circuit board (PCBA), and will also limit the installation space of the PCBA board. Utility Model Content

[0004] The present application provides a wire-to-board connector, a connector module, and an electrical device.

[0005] In a first aspect, the present application provides a wire-to-board connector, comprising a terminal and an elastic coupling. The terminal is suitable for connecting to a circuit board, and the terminal is provided with a mounting through hole, the mounting through hole passes through both ends of the terminal, and the two ends of the mounting through hole are respectively formed with a first plug interface and a second plug interface for plugging and unplugging a plug pin. The elastic coupling is accommodated in the mounting through hole and contacts the terminal, and the elastic coupling is used to clamp the plug pin.

[0006] In some optional examples, the terminal includes a plug-in portion and a limiting portion, a mounting hole is opened in the plug-in portion, the limiting portion is arranged in the mounting hole and protrudes relative to the hole wall, there are two limiting portions, the two limiting portions are respectively arranged at the first plug-in interface and the second plug-in interface, and the elastic coupling member is arranged between the two limiting portions.

[0007] In some optional examples, the end of the elastic coupling member is in abutting contact with the limiting portion, or the end of the elastic coupling member is in abutting contact with the hole wall of the mounting through hole.

[0008] In some optional examples, the elastic coupling member includes at least one of the following structures: a crown spring, a torsion spring, a wire spring, a claw, and a spring.

[0009] In some optional examples, the wire-to-board connector further includes a wear-resistant layer, and the wear-resistant layer covers the surface of the terminal and the surface of the elastic coupling member.

[0010] In some optional examples, the wire-to-board connector further includes a conductive film layer, which covers the surface of the terminal and the surface of the elastic coupling member; or, the wire-to-board connector further includes a conductive film layer, which covers the wear-resistant layer.

[0011] In some optional examples, the wear-resistant layer includes at least one of the following film layers: a high-molybdenum-nickel-based self-fluxing alloy coating, a high-chromium-molybdenum-nickel-based self-fluxing alloy coating, a high-copper self-fluxing alloy coating, and a tungsten carbide dispersed nickel-based self-fluxing alloy coating; the conductive film layer includes at least one of the following film layers: a gold-plated layer and a silver-plated layer.

[0012] In some optional examples, the circuit board is provided with a connecting through hole, and the terminal includes a limiting flange and a plug-in portion, the plug-in portion is used to pass through the connecting through hole, and the limiting flange is surrounded by a peripheral wall of the plug-in portion and protrudes relative to the peripheral wall.

[0013] On the second aspect, the present application also provides a connector module, including the above-mentioned wire-to-board connector and a pin, the pin is suitable for connecting to the wire, the pin is inserted into the installation space through the first plug interface or the second plug interface, the pin is embedded in the elastic coupling and is in contact and connected with the elastic coupling, and the pin is electrically connected to the terminal through the elastic coupling.

[0014] In a third aspect, the present application also provides an electrical device, including a circuit board and the above-mentioned connector module, wherein the terminals are connected to the circuit board.

[0015] In some optional examples, the circuit board is provided with a connecting through hole, the terminal is passed through the connecting through hole, and the terminal is welded and connected to the circuit board; the circuit board is provided with a conductive part, and the terminal is connected to the conductive part.

[0016] In the wire-to-board connector provided by the present application, the terminal is used to connect to the circuit board. When in use, the pin is inserted into the terminal and electrically connected to the terminal through the elastic coupling, and at the same time, the lower limit of the clamping action of the elastic coupling is located at the terminal. The embedded matching connection between the pin and the terminal effectively reduces the longitudinal space occupied by the pin. The pin can be plugged into the terminal through the first plug interface or the second plug interface. The two insertion methods improve the applicability, and the pin position can be flexibly adjusted, which effectively avoids the problem of interference with other structures on the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the implementation manner will be briefly introduced below. Obviously, the drawings described below are only some implementation manners of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1It is a simplified structural diagram of an electrical device provided in one embodiment of the present application.

[0019] Figure 2 It is a schematic diagram of the exploded structure of a connector module provided in one embodiment of the present application.

[0020] Figure 3 yes Figure 1 A schematic structural diagram of the electrical device shown in another perspective.

[0021] Figure 4 yes Figure 2 A schematic diagram of the cross-sectional structure of the connector module shown.

[0022] Figure numerals: 100, wire-to-board connector; 10, terminal; 12, mounting through hole; 121, first plug interface; 123, second plug interface; 14, plug-in portion; 16, limiting flange; 18, limiting portion; 30, elastic coupling member; 200, connector module; 20, pin; 21, insertion portion; 23, wiring portion; 232, connecting hole; 25, limiting boss; 300, electrical equipment; 302, circuit board; 3021, connecting through hole. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0024] If certain words are used in the specification and claims to refer to specific components, those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use differences in names as a way to distinguish components, but use differences in components' functions as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to"; "substantially" means that those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0025] See also Figure 1 , an embodiment of the present application provides a connector module 200 and an electrical device 300 equipped with the connector module 200.

[0026] This specification does not limit the specific type of the electrical device 300. For example, the electrical device 300 can be a generator, a transformer, a circuit breaker, or an electrical device including any of the aforementioned devices (generator, transformer, circuit breaker). The connector module 200 is applied to the electrical device 300, and is used for wiring between the various electronic devices of the electrical device 300. As an example, the electrical device 300 may include a housing (not shown in the figure), a circuit board 302, an electric wire (not shown in the figure), and the above-mentioned connector module 200. The circuit board 302 is arranged in the housing, and the connector module 200 is arranged between the circuit board 302 and the electric wire, and is electrically connected to the circuit board 302 and the electric wire. Among them, the electric wire can be connected to other electronic devices to achieve electrical connection between the circuit board 302 and other electronic devices.

[0027] In this application, unless otherwise clearly specified or limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be internal communication between two elements, or it can be only surface contact. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] In this embodiment, the connector module 200 may include a wire-to-board connector 100 and a plug pin 20, wherein the wire-to-board connector 100 is disposed on the circuit board 302 and electrically connected to the circuit board 302, and the plug pin 20 is connected to the wire and electrically connected to the wire-to-board connector 100. The connector module 200 is connected to the circuit board 302 through the wire-to-board connector 100 and to the wire through the plug pin 20, thereby realizing the electrical connection between the circuit board 302 and the wire.

[0029] Please also see Figure 2 and Figure 3 , the wire-to-board connector 100 may include a terminal 10 and an elastic coupling member 30. The terminal 10 is connected to the circuit board 302, and the terminal 10 is provided with a mounting through hole 12, and the mounting through hole 12 passes through both ends of the terminal 10. Specifically, the mounting through hole 12 passes through the terminal 10 along the length direction of the terminal 10, and the two ends of the mounting through hole 12 are respectively formed with a first plug interface 121 and a second plug interface 123 for plugging and unplugging the plug pin 20. The elastic coupling member 30 is accommodated in the mounting through hole 12 and contacts the terminal 10, and the elastic coupling member 30 is used to clamp the plug pin 20.

[0030] When in use, the terminal 10 is connected to the circuit board 302, the pin 20 is inserted into the terminal 10 and electrically connected to the terminal 10 through the elastic coupling member 30, and is located at the terminal 10 at the lower limit of the clamping action of the elastic coupling member 30. In this embodiment, the pin 20 is connected with the terminal 10 by an embedded fit, which effectively reduces the longitudinal space occupied by the pin 20, thereby reducing the overall occupied space of the connector module 200. The pin 20 can be plugged into the terminal 10 through the first plug interface 121 or through the second plug interface 123. The two insertion methods improve the applicability, and the pin position can be flexibly adjusted, which effectively avoids the problem of interference with other structures on the circuit board 302.

[0031] In this embodiment, the circuit board 302 may be provided with a connecting through hole 3021, which penetrates the circuit board 302 along the thickness direction of the circuit board 302, and the connecting through hole 3021 is used for the terminal 10 to be inserted. The terminal 10 may include a plug-in portion 14 and a limiting flange 16, and the plug-in portion 14 is inserted into the connecting through hole 3021. The plug-in portion 14 is generally cylindrical, and the mounting through hole 12 is provided in the plug-in portion 14, and the two ends of the plug-in portion 14 protrude from the two sides of the circuit board 302 respectively. The limiting flange 16 surrounds the peripheral wall arranged at one end of the plug-in portion 14 and protrudes relative to the peripheral wall, and the limiting flange 16 is generally annular, and its outer diameter is larger than the aperture of the mounting through hole 12. When the terminal 10 is connected to the circuit board 302, the limiting flange 16 abuts against one side of the circuit board 302.

[0032] In the description of the present application, it should be understood that terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", and "inside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only used to simplify the description of the present application and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present application.

[0033] The plug-in portion 14 and the limiting flange 16 are both circular in shape, which reduces the occupied space under the same electrical contact area, thereby reducing the use space of the entire wire-to-board connector 100. The terminal 10 passes through the circuit board 302 through the connecting through hole 3021 and is connected to the circuit board 302. The occupied space of the terminal 10 utilizes the space in the thickness direction of the circuit board 302, thereby effectively reducing the longitudinal space occupied by the terminal 10. This specification does not limit the shape and size of the terminal 10, and the inner diameter of the terminal 10, the shape of the terminal 10, etc. can be appropriately adjusted according to the current size.

[0034] This specification does not limit the specific connection method between the terminal 10 and the circuit board 302. In this embodiment, the terminal 10 and the circuit board 302 are connected by welding. Specifically, in order to facilitate welding, a pad, such as a copper pad, can be added to the circuit board 302. The pad is arranged in the connecting through hole 3021 and is located at one end of the connecting through hole 3021 close to the limiting flange 16. The limiting flange 16 is supported on the pad and is welded on the pad by a reflow soldering process, thereby realizing the welding connection between the terminal 10 and the circuit board 302.

[0035] The circuit board 302 may also be provided with a conductive layer 3023, and the terminal 10 is connected to the conductive layer 3023. This specification does not limit the specific structure of the circuit board 302. For example, the circuit board 302 may include a multilayer board, and the conductive layer 3023 may be sandwiched between other dielectric layers; or the conductive layer 3023 may also be a conductive trace on the surface of the dielectric layer.

[0036] The present specification does not limit the specific material of the terminal 10. For example, the terminal 10 may be made of copper or stainless steel. In the present embodiment, the material of the terminal 10 is H62 lead-free copper.

[0037] Please also see Figure 2 and Figure 4 In this embodiment, the elastic coupling member 30 is disposed in the mounting through hole 12, and the elastic coupling member 30 is used to connect the terminal 10 and the plug pin 20. In order to improve the stability of the elastic coupling member 30 installed in the mounting through hole 12, the terminal 10 may further include a limiting portion 18, which is disposed on the hole wall of the mounting through hole 12 and protrudes relative to the hole wall. There are two limiting portions 18, which are respectively disposed at the first plug interface 121 and the second plug interface 123, and the elastic coupling member 30 is disposed between the two limiting portions 18. The two limiting portions 18 limit the elastic coupling member 30 to prevent the elastic coupling member 30 from falling out of the terminal 10, thereby improving the structural stability.

[0038] This specification does not limit the connection method between the limiting portion 18 and the plug-in portion 14. The limiting portion 18 can be integrally formed on the inner wall of the plug-in portion 14, for example, formed by bending one end of the plug-in portion 14, or the limiting portion 18 can also be a limiting protrusion fixedly connected to the wall of the mounting through hole 12.

[0039] This specification does not limit the specific position state between the elastic coupling member 30 and the limiting portion 18. The outer peripheral wall of the elastic coupling member 30 can be in contact with the limiting portion 18. For example, one end of the elastic coupling member 30 is in contact with the corresponding limiting portion 18, and the other end is relatively spaced from the corresponding limiting portion 18; or, the two ends of the elastic coupling member 30 are respectively in contact with the corresponding limiting portions 18. In other embodiments, the outer peripheral wall of the elastic coupling member 30 can also be in contact with the hole wall of the mounting through hole 12. In this embodiment, one end of the elastic coupling member 30 is in contact with the limiting portion 18, and the outer peripheral wall of the other end is in contact with the hole wall of the mounting through hole 12, which increases the contact area between the elastic coupling member 30 and the plug-in portion 14, improves the conductive efficiency, and at the same time improves the high voltage resistance performance to achieve large current transmission.

[0040] This specification does not limit the specific type of the elastic coupling 30. The elastic coupling 30 includes at least one of the following structures: a crown spring, a torsion spring, a wire spring, a claw, and a spring. In this embodiment, the elastic coupling 30 is a crown spring. The crown spring is a compression spring, which includes a plurality of spring leaves arranged in a circumferential direction, and the plurality of spring leaves form a hollow structure. The pin 20 is inserted into the hollow of the elastic coupling 30. The minimum diameter of the hollow of the elastic coupling 30 is smaller than the outer diameter of the insertion part of the pin 20. The elastic coupling 30 contacts the inserted pin 20 through the plurality of spring leaves to achieve the purpose of electrical connection. At the same time, the spring leaves apply friction to the surface of the pin 20, thereby improving the insertion retention force of the pin 20. The plurality of spring leaves of the elastic coupling 30 increase the contact area with the pin 20, thereby reducing the space occupied and achieving large current carrying.

[0041] This specification does not limit the shape and size of the elastic coupling member 30. The shape and size of the elastic coupling member 30 can be adjusted according to the aperture of the mounting through hole 12 of the terminal 10, and the inner diameter of the spring of the elastic coupling member 30 can also be adjusted to meet different retention force requirements for the pin 20. This specification does not limit the specific material of the elastic coupling member 30. For example, the elastic coupling member 30 can be made of copper or stainless steel. In this embodiment, the material of the elastic coupling member 30 is C17200 beryllium copper.

[0042] In this embodiment, the wire-to-board connector 100 may also include a wear-resistant layer, which covers the terminal 10 and the elastic coupling member 30, improves the wear resistance of the terminal 10 and the elastic coupling member 30, and increases the plug-in and pull-out life of the wire-to-board connector 100 when it is matched with the pin 20. This specification does not limit the specific material of the wear-resistant layer. In this embodiment, the wear-resistant layer is a nickel-based self-fluxing alloy coating. For example, the wear-resistant layer may include at least one of the following alloy coatings: Ni-B-Si alloy coating, Ni-Cr-B-Si alloy coating, Ni-Cr-B-Si-Mo coating, Ni-Cr-B-Si-Mo-Cu coating, high-molybdenum nickel-based self-fluxing alloy coating, high-chromium-molybdenum nickel-based self-fluxing alloy coating, Ni-Cr-WC-based self-fluxing alloy coating, high-copper self-fluxing alloy coating, tungsten carbide dispersion type nickel-based self-fluxing alloy coating. In addition to having wear resistance, the nickel-based self-fluxing alloy coating also has good oxidation resistance, corrosion resistance, and welding performance. In this embodiment, the nickel-based self-fluxing alloy plating layer is coated on the surface of the terminal 10 and the surface of the elastic coupling member 30 by electroplating.

[0043] In order to improve the conductive performance of the wire-to-board connector 100, in this embodiment, the wire-to-board connector 100 may also include a conductive film layer, which covers the outside of the wear-resistant layer on the terminal 10 and the outside of the wear-resistant layer on the elastic coupling member 30. This specification does not limit the specific material of the conductive film layer. In this embodiment, the conductive film layer includes at least one of the following film layers: a gold-plated layer and a silver-plated layer. In this embodiment, the terminal 10 and the elastic coupling member 30 are both coated with a double layer of H62 lead-free copper substrate, a conductive film layer and a wear-resistant layer, which not only increases the conductive performance of the wire-to-board connector 100, but also greatly improves its wear resistance and improves the plug-in life.

[0044] In other embodiments, the terminal 10 may not be covered with a wear-resistant layer, but may be directly electroplated with a conductive film layer, or the terminal 10 may only be covered with a wear-resistant layer without electroplating a conductive film layer. The elastic coupling member 30 may not be covered with a wear-resistant layer, but may be directly electroplated with a conductive film layer, or the elastic coupling member 30 may only be covered with a wear-resistant layer without electroplating a conductive film layer.

[0045] In this embodiment, the pin 20 is inserted into the mounting through hole 12 through the first plug interface 121 or the second plug interface 123, the pin 20 is embedded in the elastic coupling member 30 and is in contact with the elastic coupling member 30, and the pin 20 is electrically connected to the terminal 10 through the elastic coupling member 30. The terminal 10 is inserted into the circuit board 302 so that the first plug interface 121 and the second plug interface 123 are respectively located on opposite sides of the circuit board 302. The pin 20 can be assembled on the wire-to-board connector 100 from the first plug interface 121 or from the second plug interface 123. During assembly, the pin 20 can select the insertion position according to the positions of the structures on both sides of the circuit board 302, which effectively saves the space occupied by the pin 20 and better avoids the interference problem with other structures.

[0046] The plug pin 20 may include an insertion portion 21, a connection portion 23, and a limiting boss 25. The insertion portion 21 is inserted into the mounting through hole 12, the connection portion 23 is connected to one end of the insertion portion 21 and is located outside the mounting through hole 12, and the connection portion 23 is connected to the wire. The limiting boss 25 is arranged around the peripheral wall of the connection portion 23 and protrudes relative to the peripheral wall of the insertion portion 21. When the insertion portion 21 of the plug pin 20 is inserted into the terminal 10, the limiting boss 25 abuts against one end of the terminal 10. The insertion portion 21, the connection portion 23, and the limiting boss 25 may be integrally formed and connected.

[0047] In order to facilitate the connection of the wire, the outer diameter of the connection part 23 is larger than the outer diameter of the insertion part 21, and a connection hole 232 is provided at one end of the connection part 23 away from the insertion part 21. The plug pin 20 and the wire are connected by cold pressing technology. Specifically, when connecting the wire, one end of the wire is inserted into the connection hole 232, and a special cold pressing pliers is used to squeeze and deform the end of the connection part 23 away from the insertion part 21 to press the wire tightly, thereby completing the connection between the plug pin 20 and the wire. The insertion part 21, the connection part 23 and the limiting boss 25 all have a roughly cylindrical shape, which reduces the floor space, and the cold pressing technology is used to connect the wire, which reduces the space occupied by the plug pin 20 in the outlet direction.

[0048] This specification does not limit the size and shape of the pin 20. The pin 20 can appropriately adjust the diameter of the insertion portion 21 according to the current size during actual use, or adjust the outer diameter or shape of the wire pressing end of the connection portion 23.

[0049] This specification does not limit the specific material of the pin 20. For example, the pin 20 can be made of copper or stainless steel. In this embodiment, the material of the pin 20 is H62 lead-free copper. In some embodiments, the surface of the pin 20 can also be covered with a wear-resistant layer, for example, the surface of the pin 20 is electroplated with a nickel-based self-fluxing alloy. A conductive film layer can also be covered on the wear-resistant layer, for example, the outermost layer of the pin 20 is silver-plated or gold-plated. Alternatively, the pin 20 may not be covered with a wear-resistant layer, and a conductive film layer may be directly electroplated, or the pin 20 may only be covered with a wear-resistant layer without electroplating a conductive film layer.

[0050] In the connector module 200 provided in the embodiment of the present application, the terminal 10 is connected to the circuit board 302, the pin 20 is inserted into the terminal 10 and electrically connected to the terminal 10 through the elastic coupling member 30, and is located at the terminal 10 at the lower limit of the clamping action of the elastic coupling member 30. In this embodiment, the pin 20 is connected to the terminal 10 by an embedded fit, which effectively reduces the longitudinal space occupied by the pin 20, thereby reducing the overall occupied space of the connector module 200. The multiple springs of the elastic coupling member 30 increase the contact area with the pin 20, and realize large current carrying while reducing the space occupied. The pin 20 can be plugged into the terminal 10 through the first plug interface 121, and can also be plugged into the terminal 10 through the second plug interface 123. The two insertion methods improve the applicability, and the pin position can be flexibly adjusted, which effectively avoids the problem of interference with other structures on the circuit board 302.

[0051] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application is described in detail with reference to the above embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents. However, these modifications or replacements do not drive the essence of the corresponding technical solutions out of the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A wire-to-board connector, characterized in that: include: The terminal is suitable for connecting to the circuit board, the terminal is provided with a mounting through hole, the mounting through hole runs through both ends of the terminal, and the two ends of the mounting through hole are respectively formed with a first plug interface and a second plug interface for plugging and unplugging the pin; And an elastic coupling piece, which is accommodated in the mounting through hole and contacts the terminal, and is used for clamping the plug pin.

2. The wire-to-board connector according to claim 1, wherein: The terminal includes a plug-in portion and a limiting portion, the mounting through hole is opened in the plug-in portion, the limiting portion is arranged in the mounting through hole and protrudes relative to the hole wall of the mounting through hole, there are two limiting portions, the two limiting portions are respectively arranged at the first plug-in interface and the second plug-in interface, and the elastic coupling member is arranged between the two limiting portions.

3. The wire-to-board connector according to claim 2, wherein: The end of the elastic coupling member is in abutment contact with the limiting portion, or the end of the elastic coupling member is in abutment contact with the hole wall of the mounting through hole.

4. The wire-to-board connector according to claim 2, wherein: The elastic coupling member includes at least one of the following structures: a crown spring, a torsion spring, a wire spring, a claw, and a spring sheet.

5. The wire-to-board connector according to any one of claims 1 to 4, characterized in that: The wire-to-board connector further includes a wear-resistant layer, and the wear-resistant layer covers the surface of the terminal and the surface of the elastic coupling member.

6. The wire-to-board connector according to claim 5, characterized in that: The wire-to-board connector further includes a conductive film layer, and the conductive film layer covers the surface of the terminal and the surface of the elastic coupling member; or, The wire-to-board connector further includes a conductive film layer, and the conductive film layer covers the wear-resistant layer.

7. The wire-to-board connector according to claim 6, wherein: The wear-resistant layer includes at least one of the following film layers: a high-molybdenum-nickel-based self-fluxing alloy coating, a high-chromium-molybdenum-nickel-based self-fluxing alloy coating, a high-copper self-fluxing alloy coating, and a tungsten carbide dispersed nickel-based self-fluxing alloy coating; the conductive film layer includes at least one of the following film layers: a gold-plated layer and a silver-plated layer.

8. The wire-to-board connector according to any one of claims 1 to 4, characterized in that: The circuit board is provided with a connecting through hole, and the terminal includes a limiting flange and a plug-in portion, the plug-in portion is used to pass through the connecting through hole, and the limiting flange is arranged around the peripheral wall of the plug-in portion and protrudes relative to the peripheral wall.

9. A connector module, characterized in that: include: The wire-to-board connector according to any one of claims 1 to 8; And a pin suitable for connecting to the wire, the pin is inserted into the mounting through hole through the first plug interface or the second plug interface, the pin is embedded in the elastic coupling and is in contact with and connected to the elastic coupling, and the pin is electrically connected to the terminal through the elastic coupling.

10. An electrical device, characterized in that: include: Circuit boards; And the connector module as claimed in claim 9, wherein the terminal is connected to the circuit board.

11. The electrical device according to claim 10, characterized in that The circuit board is provided with a connecting through hole, the terminal is passed through the connecting through hole, and the terminal is connected to the circuit board by welding; the circuit board is provided with a conductive part, and the terminal is connected to the conductive part.

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