Composite contact and relay

Abstract

The utility model relates to a composite contact and a relay. The composite contact includes a substrate and an electrical contact layer. The base body is provided with a first surface, and the edge of the first surface is provided with a first embedding groove. The electric contact layer comprises a main body part and a first embedding part connected with the main body part, the main body part is arranged on the first surface, a first through hole is formed in the edge of the main body part, and the first through hole is opposite to a notch of the first embedding groove. The first embedding part extends from the hole wall of the first through hole to the direction close to the groove bottom of the first embedding groove, and the first embedding part is arranged in the first embedding groove. Therefore, the embedded structure that the first embedded part is embedded into the first embedded groove is not limited by the processing technology, the material consumption of the electric contact layer can be reduced, and the cost is saved.

Description

Technical Field

[0001] The present application relates to the field of electronic technology, and in particular to a composite contact and a relay. Background Art

[0002] The composite contact includes a base and an electrical contact layer, which is disposed on the base and in contact with the base plane. However, due to the thin edges of the electrical contact layer, the bonding strength between the electrical contact layer and the base is poor. This can lead to cracking and warping of the edges of the composite contact after riveting the composite contact to the spring.

[0003] In order to solve the above problem, an embedding groove is provided on the substrate, and the electrical contact layer fills the entire embedding groove. However, this composite contact is limited by the processing technology, and the electrical contact layer requires a large amount of material. Utility Model Content

[0004] Based on this, it is necessary to provide a composite contact and relay that is not restricted by processing technology and can also reduce the amount of material used in the electrical contact layer and save costs.

[0005] In a first aspect, the present application provides a composite contact, comprising:

[0006] A base body, the base body having a first surface, an edge of the first surface being provided with a first embedding groove; and

[0007] An electrical contact layer includes a main body and a first embedded portion connected to the main body, the main body is provided on the first surface, a first through hole is provided at the edge of the main body, the first through hole is arranged opposite to the notch of the first embedded groove, the first embedded portion extends from the hole wall of the first through hole toward the direction close to the first embedded groove, and the first embedded portion is provided in the first embedded groove.

[0008] The aforementioned composite contact, in which the first embedded portion is embedded in the first embedded groove, can be formed during the composite contact pier molding process or can be processed and formed after the composite contact pier molding process. That is, the embedded structure in which the first embedded portion is embedded in the first embedded groove is not subject to processing restrictions. Because the first through-hole is provided at the edge of the main body, the first embedded portion extends from the wall of the first through-hole toward the first embedded groove. This reduces the amount of material used in the electrical contact layer, thereby saving costs.

[0009] In one embodiment, the first embedded portion includes a first embedded wall disposed around the first through-hole, forming a first cavity that communicates with the first through-hole. This reduces the amount of material used for the electrical contact layer, saving costs. Furthermore, the top of the first embedded wall is hollowed out, making it less susceptible to arc erosion and deformation, thereby ensuring a reliable connection between the first embedded wall and the wall of the first embedded slot.

[0010] In one embodiment, the first embedded wall has a uniform thickness, so that the amount of material used for the electrical contact layer can be reduced, thereby saving costs, while ensuring the bonding force between the first embedded wall and the wall of the first embedded groove.

[0011] In one embodiment, there are multiple first embedding grooves, all of which are spaced apart along the circumference of the first surface to form a ring shape; there are multiple first through holes, all of which are spaced apart along the circumference of the main body, and all of which correspond to all of the first embedding grooves; there are multiple first embedding portions, all of which are connected to the hole walls of all of the first through holes, and all of which correspond to all of the first embedding grooves. In this way, the bonding strength between the substrate and the electrical contact layer can be further improved.

[0012] In one embodiment, the first embedding portion and the first embedding groove are conical in shape.

[0013] In one embodiment, a second embedding groove is provided in the middle of the first surface, a second through-hole is provided in the middle of the main body, and the second through-hole is disposed opposite the opening of the second embedding groove. The electrical contact layer further includes a second embedding portion connected to the main body, extending from the wall of the second through-hole toward the bottom of the second embedding groove and disposed within the second embedding groove. This improves the overall bonding strength between the substrate and the electrical contact layer.

[0014] In one embodiment, the composite contact is formed by piercing; alternatively, the substrate and the electrical contact layer are welded. For piercing composite contacts, by positioning the first embedded portion within the first embedded groove, an effective embedding and gripping force is formed between the substrate and the electrical contact layer, thereby improving the bonding strength between the substrate and the electrical contact layer. For welded composite contacts, by positioning the first embedded portion within the first embedded groove, the substrate and the electrical contact layer can be better pre-positioned, improving the molding accuracy of the substrate and the electrical contact layer, and also improving the bonding strength between the substrate and the electrical contact layer.

[0015] In one embodiment, a contact surface is provided on the side of the main body facing away from the base; alternatively, a first contact surface and a second contact surface are provided on the side of the main body facing away from the base, with the first contact surface being located in the middle of the main body and the second contact surface surrounding the first contact surface, with the first contact surface protruding from the second contact surface. When a composite contact having a first contact surface and a second contact surface is used in a single contact product, arcing can be concentrated on the first contact surface, reducing edge erosion on the second contact surface.

[0016] In one embodiment, the composite contact is of rivet type, the base includes a nail head and a nail tail connected to the nail head, and the electrical contact layer is provided on a side of the nail head facing away from the nail tail.

[0017] In a second aspect, the present application provides a relay comprising any of the composite contacts described above.

[0018] In the aforementioned relay, the embedded structure in which the first embedded portion is embedded in the first embedded groove can be formed during the molding process of the composite contact pier, or can be formed afterward. This means that the embedded structure in which the first embedded portion is embedded in the first embedded groove is not subject to processing restrictions. Because the first through-hole is provided on the edge of the main body, the first embedded portion extends from the wall of the first through-hole toward the first embedded groove. This reduces the amount of material used in the electrical contact layer, thereby saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 FIG. 1 is a schematic diagram of a cap-type composite contact formed by a piercing process according to an embodiment of the present application.

[0020] Figure 2 for Figure 1 A top view of a truncated cap-type composite contact is shown.

[0021] Figure 3 for Figure 2 Cross-sectional view along AA.

[0022] Figure 4 for Figure 3 A local enlarged schematic diagram of point A in the middle.

[0023] Figure 5 FIG. 1 is a schematic diagram of a cap-type composite contact bonded by welding according to an embodiment of the present application.

[0024] Figure 6 for Figure 5 A top view of a solder bonded cap-type composite contact is shown.

[0025] Figure 7 for Figure 6 Cross-sectional view along BB.

[0026] Figure 8 for Figure 7 A partial enlarged schematic diagram of point B in the middle.

[0027] Figure 9 Schematic diagram of a non-cap type composite contact formed by a pier according to an embodiment of the present application.

[0028] Figure 10 for Figure 9 A top view of a pier-molded, non-cap-type composite contact is shown.

[0029] Figure 11 for Figure 10 Cross-sectional view along CC.

[0030] Figure 12 for Figure 11 A partial enlarged schematic diagram of point C in the middle.

[0031] Figure 13 This is a schematic diagram of a cap-type composite contact formed by piercing according to another embodiment of the present application.

[0032] Figure 14 for Figure 13 A top view of a truncated cap-type composite contact is shown.

[0033] Figure 15 for Figure 14 Cross-sectional view along DD.

[0034] Figure 16 for Figure 15 A local enlarged schematic diagram of point D in the middle.

[0035] Figure 17 This is a schematic diagram of a non-cap type composite contact formed by a pier molding according to another embodiment of the present application.

[0036] Figure 18 for Figure 17 A top view of a pier-molded, non-cap-type composite contact is shown.

[0037] Figure 19 for Figure 18 Cross-sectional view along EE.

[0038] Figure 20 for Figure 19 A partial enlarged schematic diagram of point E in the middle.

[0039] Figure 21 This is a schematic diagram of a cap-type composite contact formed by piercing according to another embodiment of the present application.

[0040] Figure 22 for Figure 21 A top view of a truncated cap-type composite contact is shown.

[0041] Figure 23 for Figure 22 Cross-sectional view along the middle line FF.

[0042] Figure 24 for Figure 23 A partial enlarged schematic diagram of point F in the middle.

[0043] Figure 25 This is a schematic diagram of a non-cap type composite contact formed by a pier according to another embodiment of the present application.

[0044] Figure 26 for Figure 25 A top view of a pier-molded, non-cap-type composite contact is shown.

[0045] Figure 27 for Figure 26 Cross-sectional view along GG.

[0046] Figure 28 for Figure 27 A local enlarged schematic diagram of point G in the middle.

[0047] Description of Figure Numbers:

[0048] 10. Base; 11. Nail head; 111. First embedding groove; 112. Second embedding groove; 12. Nail tail; 20. Electrical contact layer; 21. Main body; 211. First through hole; 212. Second through hole; 213. First contact surface; 214. Second contact surface; 22. First embedding portion; 221. First embedding wall; 222. First cavity; 23. Second embedding portion; 231. Second embedding wall; 232. Second cavity; 30. First welding layer; 40. Second welding layer. DETAILED DESCRIPTION

[0049] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0050] A relay provided in an embodiment of the present application includes a composite contact. Optionally, the relay is a magnetic latching relay.

[0051] In one embodiment, Figures 1 to 4The composite contact includes a substrate 10 and an electrical contact layer 20. The substrate 10 has a first surface, with a first embedded groove 111 defined at the edge of the first surface. The electrical contact layer 20 includes a main body 21 and a first embedded portion 22 connected to the main body 21. The main body 21 is disposed on the first surface, and a first through-hole 211 is defined at the edge of the main body 21. The first through-hole 211 is disposed opposite the notch of the first embedded groove 111. The first embedded portion 22 extends from the wall of the first through-hole 211 toward the bottom of the first embedded groove 111, and is disposed within the first embedded groove 111.

[0052] Optionally, see Figure 1 and Figure 3 The composite contact is a rivet-type. Specifically, the base 10 includes a rivet head 11 and a rivet tail 12. The rivet head 11 and the rivet tail 12 are connected to form a T-shape. The electrical contact layer 20 is provided on the side of the rivet head 11 facing away from the rivet tail 12. The first surface refers to the side of the rivet head 11 facing away from the rivet tail 12.

[0053] It should be noted that there are multiple methods for forming composite contacts, and during the actual processing, they can be selected according to actual needs.

[0054] Optionally, see Figures 1 to 4 For the composite contact formed by the pier molding, by arranging the first embedding portion 22 in the first embedding groove 111, an effective embedding gripping force is formed between the substrate 10 and the electrical contact layer 20, thereby increasing the bonding force between the substrate 10 and the electrical contact layer 20.

[0055] Optionally, the substrate 10 is welded to the electrical contact layer 20. Figures 5 to 8 The composite contact further includes a first welding layer 30 and a second welding layer 40 connected to the first welding layer 30. The first welding layer 30 is provided on the first surface, and the main body 21 is connected to the first surface via the first welding layer 30. The second welding layer 40 is provided on the groove wall of the first embedded groove 111, and the first embedded portion 22 is connected to the groove wall of the first embedded groove 111 via the second welding layer 40.

[0056] For the composite contact bonded by welding, by arranging the first embedded portion 22 in the first embedded groove 111, the base 10 and the electrical contact layer 20 can be better pre-positioned, the molding accuracy of the base 10 and the electrical contact layer 20 can be improved, and the bonding force between the base 10 and the electrical contact layer 20 can also be improved.

[0057] The composite contact described above, by embedding the first embedding portion 22 of the electrical contact layer 20 within the first embedding groove 111 of the substrate 10, can increase the bonding strength between the edge of the substrate 10 and the edge of the electrical contact layer 20. After the composite contact is riveted to the spring, cracking and warping of the composite contact edge can be reduced, ensuring the contact area between the substrate 10 and the electrical contact layer 20, preventing the composite contact from heating up, and improving the long-term current-carrying capacity of the relay. During electrical durability testing, the electrical contact layer 20 can be protected from arc erosion, and the substrate 10 can be exposed. This solves the problem of composite contact adhesion during electrical durability testing, prevents premature relay failure, and increases the number of times the relay can be used for on-load switching during electrical durability testing.

[0058] In this embodiment, the embedded structure of the first embedded portion 22 embedded in the first embedded groove 111 can be formed during the molding process of the composite contact pier, or can be processed and formed after the composite contact pier is molded. That is, the embedded structure of the first embedded portion 22 embedded in the first embedded groove 111 is not restricted by the manufacturing process. Because the first through hole 211 is provided on the edge of the main body 21, the first embedded portion 22 extends from the hole wall of the first through hole 211 toward the first embedded groove 111. This can reduce the amount of material used in the electrical contact layer 20, saving costs.

[0059] In one embodiment, see Figure 4 The first embedded portion 22 includes a first embedded wall 221, which extends from the wall of the first through-hole 211 toward the bottom of the first embedded groove 111. The first embedded wall 221 surrounds the first through-hole 211 and forms a first cavity 222, which communicates with the first through-hole 211. It will be appreciated that the first embedded portion 22 is a hollow structure. This reduces the material used for the electrical contact layer 20, saving costs.

[0060] It should be noted that, see Figure 3 and Figure 4 In this embodiment, the top of the first embedded wall 221 is hollowed out, so that the first embedded wall 221 is not easily eroded by the arc, which can avoid deformation of the first embedded wall 221 and ensure the reliability of the connection between the first embedded wall 221 and the groove wall of the first embedded groove 111.

[0061] In one embodiment, see Figure 4 The first embedded wall 221 has a uniform thickness. It is understood that the thickness of the first embedded wall 221 is uniform at all locations. This ensures the bonding strength between the first embedded wall 221 and the wall of the first embedded groove 111 while reducing the amount of material used for the electrical contact layer 20 and saving costs.

[0062] In one embodiment, a plurality of first embedding grooves 111 are provided, and all first embedding grooves 111 are spaced apart along the circumference of the first surface to form a ring shape.

[0063] Further, see Figure 2 、 Figure 4 、 Figure 6 、 Figure 8 、 Figure 10 、 Figure 12 、 Figure 14 、 Figure 16 、 Figure 18 and Figure 20 There are multiple first through holes 211, all of which are spaced apart along the circumference of the main body 21. All of the first through holes 211 are arranged in a one-to-one correspondence with all of the first embedding grooves 111. There are multiple first embedding portions 22, all of which are connected to all of the first through holes 211 in a one-to-one correspondence, and all of the first embedding portions 22 are embedded and matched with all of the first embedding grooves 111 in a one-to-one correspondence. In this way, the embedded and matched arrangement of the multiple first embedding portions 22 with the multiple first embedding grooves 111 further improves the bonding strength between the base 10 and the electrical contact layer 20. After the composite contact and the spring are riveted together, cracking and warping of the edge of the electrical contact layer 20 are reduced.

[0064] Optionally, the first embedding grooves 111 are arranged at equal intervals along the circumference of the first surface. The first through holes 211 and the first embedding portions 22 are also arranged at equal intervals along the circumference of the main body 21 .

[0065] For the thinner electrical contact layer 20, in order to improve the overall bonding strength between the substrate 10 and the electrical contact layer 20, in this embodiment, refer to Figures 21 to 28 A second embedded groove 112 is defined in the middle of the first surface. A second through-hole 212 is defined in the middle of the main body 21, and is positioned opposite the opening of the second embedded groove 112. The electrical contact layer 20 further includes a second embedded portion 23 connected to the main body 21. The second embedded portion 23 extends from the wall of the second through-hole 212 toward the bottom of the second embedded groove 112 and is positioned within the second embedded groove 112.

[0066] It is understandable that if the electrical contact layer 20 is relatively thin, in addition to embedding the edge of the substrate 10 with the edge of the electrical contact layer 20, the middle of the substrate 10 can also be embedded with the middle of the electrical contact layer 20 to improve the overall bonding strength between the substrate 10 and the electrical contact layer 20.

[0067] In one embodiment, see Figure 23 and Figure 28The second embedded portion 23 includes a second embedded wall 231 extending from the wall of the second through-hole 212 toward the bottom of the second embedded groove 112. The second embedded wall 231 surrounds the second through-hole 212 to form a second cavity 232, which communicates with the second through-hole 212. It will be appreciated that the second embedded portion 23 is a hollow structure. This reduces the amount of electrical contact layer 20 used, saving costs.

[0068] It should be noted that, in this embodiment, the upper part of the second embedded wall 231 is hollowed out, so that the second embedded wall 231 is not easily burned by the arc, which can avoid deformation of the second embedded wall 231 and ensure the reliability of the connection between the second embedded wall 231 and the groove wall of the second embedded groove 112.

[0069] In one embodiment, see Figure 24 and Figure 28 The second embedded wall 231 has a uniform thickness. It is understood that the thickness of the second embedded wall 231 is equal at all locations. This ensures the bonding strength between the second embedded wall 231 and the wall of the second embedded groove 112 while reducing the amount of material used for the electrical contact layer 20 and saving costs.

[0070] In one embodiment, see Figure 11 、 Figure 12 、 Figure 15 、 Figure 16 、 Figure 19 and Figure 20 The first embedding groove 111 and the second embedding groove 112 are tapered, and the first embedding portion 22 and the second embedding portion 23 are tapered. Specifically, the first embedding groove 111 and the second embedding groove 112 are tapered grooves, and the first embedding portion 22 and the second embedding portion 23 are hollow cones.

[0071] Of course, in other embodiments, the cross-sectional shape of the first embedding groove 111, the first embedding portion 22, the second embedding groove 112, and the second embedding portion 23 is square, the first embedding groove 111 and the second embedding groove 112 are square grooves, and the first embedding portion 22 and the second embedding portion 23 are square bodies. Alternatively, the cross-sectional shape of the first embedding groove 111, the first embedding portion 22, the second embedding groove 112, and the second embedding portion 23 is arc-shaped, the first embedding groove 111 and the second embedding groove 112 are arc-shaped grooves, and the first embedding portion 22 and the second embedding portion 23 are arc-shaped bodies.

[0072] In one embodiment, Figure 9 、 Figure 11 、 Figure 17 、 Figure 19 、 Figure 25 and Figure 27The electrical contact layer 20 has a contact surface on the side facing away from the substrate 10. Optionally, the contact surface is a flat surface; or, alternatively, the contact surface is a curved surface that bulges away from the first surface. It is understood that the side of the electrical contact layer 20 facing away from the substrate 10 is a completely flat surface or a curved surface.

[0073] Of course, the electrical contact layer 20 may also be structurally designed on the side facing away from the substrate 10. Figure 3 、 Figure 5 、 Figure 7 、 Figure 13 、 Figure 15 、 Figure 21 and Figure 23 The main body 21 has a first contact surface 213 and a second contact surface 214 on the side facing away from the base 10. The first contact surface 213 is located in the middle of the main body 21, and the second contact surface 214 surrounds the first contact surface 213, with the first contact surface 213 protruding from the second contact surface 214.

[0074] Optionally, the first contact surface 213 and the second contact surface 214 are planes. Alternatively, the first contact surface 213 and the second contact surface 214 are arcuate surfaces, which are convex in a direction away from the first surface.

[0075] When the composite contact of this embodiment is applied to a single contact product, the arc can be concentrated on the first contact surface 213 , reducing edge erosion of the second contact surface 214 .

[0076] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0077] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0078] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0079] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0080] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0081] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0082] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A composite contact, characterized in that: include: A base body, the base body having a first surface, an edge of the first surface being provided with a first embedding groove; as well as An electrical contact layer includes a main body and a first embedded portion connected to the main body, the main body is provided on the first surface, a first through hole is provided at the edge of the main body, the first through hole is arranged opposite to the notch of the first embedded groove, the first embedded portion extends from the hole wall of the first through hole toward the direction close to the first embedded groove, and the first embedded portion is provided in the first embedded groove.

2. The composite contact according to claim 1, characterized in that: The first embedded portion includes a first embedded wall, which is disposed around the first through hole. The first embedded wall is formed to form a first cavity, and the first cavity is communicated with the first through hole.

3. The composite contact according to claim 2, characterized in that: The first embedded wall has a uniform thickness.

4. The composite contact according to claim 1, characterized in that: There are a plurality of first embedding grooves, and all of the first embedding grooves are spaced apart along the circumference of the first surface to form a ring shape; There are a plurality of first through holes, all of which are spaced apart along the circumference of the main body to form a ring shape, and all of the first through holes are arranged in a one-to-one correspondence with all of the first embedding grooves; There are multiple first embedding parts, all of which are connected to the hole walls of all of the first through holes, and all of the first embedding parts are embedded and matched with all of the first embedding grooves in a one-to-one correspondence.

5. The composite contact according to claim 1, characterized in that: The first embedding portion and the first embedding groove are tapered in shape.

6. The composite contact according to claim 1, characterized in that: A second embedding groove is provided in the middle of the first surface, a second through hole is provided in the middle of the main body, and the second through hole is arranged opposite to the notch of the second embedding groove; The electrical contact layer further includes a second embedded portion connected to the main body portion, the second embedded portion extending from the hole wall of the second through hole toward the bottom of the second embedded groove, and the second embedded portion is disposed in the second embedded groove.

7. The composite contact according to any one of claims 1 to 6, characterized in that: The composite contact is formed into a mold; or the base and the electrical contact layer are welded.

8. The composite contact according to any one of claims 1 to 6, characterized in that: A contact surface is provided on the side of the main body facing away from the base; Alternatively, a first contact surface and a second contact surface are provided on a side of the main body away from the base, the first contact surface is provided in the middle of the main body, the second contact surface is provided around the first contact surface, and the first contact surface protrudes from the second contact surface.

9. The composite contact according to any one of claims 1 to 6, characterized in that: The composite contact is of rivet type, the base comprises a nail head and a nail tail connected to the nail head, and the electrical contact layer is arranged on a side of the nail head away from the nail tail.

10. A relay, characterized in that: Comprising the composite contact according to any one of claims 1 to 9.

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