Composite contact and relay

Abstract

The present application relates to a composite contact and a relay. The composite contact comprises a base body (10) and an electrical contact layer (20). The base body (10) has a first surface, and an edge of the first surface is provided with first embedding recesses (111). The electrical contact layer (20) comprises a main body portion (21) and first embedding portions (22) connected to the main body portion (21); the main body portion (21) is arranged on the first surface; an edge of the main body portion (21) is provided with first through holes (211); and the first through holes (211) are arranged so as to be aligned with openings of the first embedding recesses (111). Each first embedding portion (22) extends from the hole wall of a first through hole (211) in a direction approaching the recess bottom of a first embedding recess (111), and the first embedding portion (22) is provided in the first embedding recess (111).

Description

Composite contacts and relays

[0001] Related applications

[0002] This application claims priority to Chinese patent application No. 2024225555728, filed on October 22, 2024, entitled "Composite Contacts and Relays", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of electronic technology, and in particular to a composite contact and relay. Background Technology

[0004] Composite contacts consist of a substrate and an electrical contact layer, with the electrical contact layer disposed on the substrate and in contact with the substrate plane. However, due to the thin edges of the electrical contact layer and the poor bonding force between the electrical contact layer and the substrate, the edges of the composite contacts are prone to cracking and lifting after being riveted to the spring.

[0005] To address these issues, an embedding groove is created in the substrate, and the electrical contact layer fills the entire groove. However, this composite contact is limited by the manufacturing process, and the amount of material used in the electrical contact layer is relatively large. Summary of the Invention

[0006] Based on this, according to various embodiments of this application, it is necessary to provide a composite contact and a relay.

[0007] In a first aspect, this application provides a composite contact, comprising:

[0008] A substrate having a first surface, the edge of which is provided with a first embedding groove; and

[0009] An electrical contact layer includes a main body and a first embedded part. The main body is connected to the first embedded part. The main body is disposed on the first surface. The edge of the main body is provided with a first through hole. The first through hole is disposed opposite to the opening of the first embedded groove. The first embedded part extends from the hole wall of the first through hole toward the direction close to the first embedded groove. The first embedded part is disposed in the first embedded groove.

[0010] In one embodiment, the first embedding portion includes a first embedding wall, which surrounds the first through hole and forms a first cavity, which communicates with the first through hole.

[0011] In one embodiment, the thickness of the first embedded wall is uniform.

[0012] In one embodiment, there are multiple first embedding slots, all of which are circumferentially spaced along the first surface to form an annular shape; there are multiple first through holes, all of which are circumferentially spaced along the main body, and each of the first through holes corresponds to one of the first embedding slots; there are multiple first embedding parts, all of which are connected to the hole walls of each of the first through holes, and each of the first embedding parts is fitted into each of the first embedding slots.

[0013] In one embodiment, the first embedding groove is provided at equal intervals along the circumference of the first surface; the first through hole and the first embedding portion are both provided at equal intervals along the circumference of the main body.

[0014] In one embodiment, the first embedding portion and the first embedding groove are tapered.

[0015] In one embodiment, the first surface has a second embedding groove in the middle, and the main body has a second through hole in the middle, the second through hole being disposed opposite to the groove opening of the second embedding groove; the electrical contact layer further includes a second embedding part connected to the main body, the second embedding part extending from the hole wall of the second through hole toward the groove bottom of the second embedding groove, the second embedding part being disposed in the second embedding groove.

[0016] In one embodiment, the second embedding portion includes a second embedding wall that extends from the wall of the second through hole toward the bottom of the second embedding groove; the second embedding wall is disposed around the second through hole to form a second cavity that communicates with the second through hole.

[0017] In one embodiment, the second embedded wall has a uniform wall thickness.

[0018] In one embodiment, both the second embedding groove and the second embedding portion are tapered.

[0019] In one embodiment, the composite contact block is formed.

[0020] In one embodiment, the substrate is welded to the electrical contact portion.

[0021] In one embodiment, the main body has a contact surface on the side opposite to the substrate.

[0022] In one embodiment, the main body portion has a first contact surface and a second contact surface on the side opposite to the substrate. The first contact surface is located in the middle of the main body portion, and the second contact surface is arranged around the first contact surface. The first contact surface protrudes from the second contact surface.

[0023] In one embodiment, the composite contact is rivet-type, the substrate includes a rivet head and a rivet tail connected to the rivet head, and the electrical contact layer is disposed on the side of the rivet head away from the rivet tail.

[0024] Secondly, this application provides a relay including any of the above-mentioned composite contacts.

[0025] Details of one or more embodiments of the present invention are set forth in the following drawings and description. Other features, objects, and advantages of the invention will become apparent from the specification, drawings, and claims. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the disclosed drawings without creative effort.

[0027] Figure 1 is a schematic diagram of a cap-type composite contact formed by a pier in an embodiment of this application.

[0028] Figure 2 is a top view of the cap-shaped composite contact formed by the pier shown in Figure 1.

[0029] Figure 3 is a cross-sectional view along AA in Figure 2.

[0030] Figure 4 is a magnified view of part A in Figure 3.

[0031] Figure 5 is a schematic diagram of a cap-type composite contact with welded connection according to an embodiment of this application.

[0032] Figure 6 is a top view of the cap-type composite contact with welded joint shown in Figure 5.

[0033] Figure 7 is a cross-sectional view along BB in Figure 6.

[0034] Figure 8 is a magnified view of part B in Figure 7.

[0035] Figure 9 is a schematic diagram of a non-cap-type composite contact formed by a pier according to an embodiment of this application.

[0036] Figure 10 is a top view of the non-cap-type composite contact formed by the pier shown in Figure 9.

[0037] Figure 11 is a cross-sectional view along CC in Figure 10.

[0038] Figure 12 is a magnified view of part C in Figure 11.

[0039] Figure 13 is a schematic diagram of a cap-type composite contact formed by a pier in another embodiment of this application.

[0040] Figure 14 is a top view of the cap-shaped composite contact formed by the pier shown in Figure 13.

[0041] Figure 15 is a cross-sectional view along DD in Figure 14.

[0042] Figure 16 is a magnified view of part D in Figure 15.

[0043] Figure 17 is a schematic diagram of a non-cap-type composite contact formed by a pier according to another embodiment of this application.

[0044] Figure 18 is a top view of the non-cap-type composite contact formed by the pier shown in Figure 17.

[0045] Figure 19 is a cross-sectional view along EE in Figure 18.

[0046] Figure 20 is a magnified view of part E in Figure 19.

[0047] Figure 21 is a schematic diagram of a cap-type composite contact formed by a pier in another embodiment of this application.

[0048] Figure 22 is a top view of the cap-shaped composite contact formed by the pier shown in Figure 21.

[0049] Figure 23 is a cross-sectional view along FF in Figure 22.

[0050] Figure 24 is a magnified view of part F in Figure 23.

[0051] Figure 25 is a schematic diagram of a non-cap-type composite contact formed by a pier in another embodiment of this application.

[0052] Figure 26 is a top view of the non-cap-type composite contact formed by the pier shown in Figure 25.

[0053] Figure 27 is a cross-sectional view along GG in Figure 26.

[0054] Figure 28 is a magnified view of part G in Figure 27.

[0055] Explanation of reference numerals in the attached drawings: 10, base material; 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 part; 221, first embedding wall; 222, first cavity; 23, second embedding part; 231, second embedding wall; 232, second cavity; 30, first welding layer; 40, second welding layer. Detailed Implementation

[0056] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0057] One embodiment of this application provides a relay including composite contacts. Optionally, the relay is a magnetic latching relay.

[0058] In one embodiment, as shown in Figures 1 to 4, the composite contact includes a substrate 10 and an electrical contact layer 20. The substrate 10 has a first surface, and the edge of the first surface has a first embedding groove 111. The electrical contact layer 20 includes a main body 21 and a first embedding part 22 connected to the main body 21. The main body 21 is disposed on the first surface, and the edge of the main body 21 has a first through hole 211, which is disposed opposite to the opening of the first embedding groove 111. The first embedding part 22 extends from the wall of the first through hole 211 toward the bottom of the first embedding groove 111, and the first embedding part 22 is disposed within the first embedding groove 111.

[0059] Optionally, referring to Figures 1 and 3, the composite contact is a rivet type. Specifically, the substrate 10 includes a rivet head 11 and a rivet tail 12, which are connected to form a T-shape. The electrical contact layer 20 is disposed on the side of the rivet head 11 away from the rivet tail 12. Herein, the first surface refers to the side of the rivet head 11 away from the rivet tail 12.

[0060] It should be noted that there are various methods for forming composite contacts, and the appropriate method can be selected based on actual needs during the processing.

[0061] Optionally, referring to Figures 1 to 4, the composite contact is formed by inserting the first embedding part 22 into the first embedding groove 111, thereby forming an effective embedding and gripping force 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.

[0062] Optionally, the substrate 10 is welded to the electrical contact layer 20. Specifically, referring to 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 disposed on the first surface, and the main body 21 is connected to the first surface through the first welding layer 30. The second welding layer 40 is disposed on the groove wall of the first embedding groove 111, and the first embedding part 22 is connected to the groove wall of the first embedding groove 111 through the second welding layer 40.

[0063] For composite contacts with welded joints, by placing the first embedding part 22 in the first embedding groove 111, the substrate 10 and the electrical contact layer 20 can be better pre-positioned, improving the forming accuracy of the substrate 10 and the electrical contact layer 20, and also improving the bonding force between the substrate 10 and the electrical contact layer 20.

[0064] The aforementioned composite contact, by embedding the first embedding portion 22 of the electrical contact layer 20 into the first embedding groove 111 of the substrate 10, increases the bonding force 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, it can improve the situation of cracking and warping at the edge of the composite contact, ensure the contact area between the substrate 10 and the electrical contact layer 20, avoid the temperature rise of the composite contact, and improve the long-term current carrying capacity of the relay. During the electrical durability test, it can prevent the electrical contact layer 20 from being burned by electric arc, prevent the substrate 10 from being exposed, solve the problem of adhesion of the composite contact during the electrical durability test, prevent the relay from failing prematurely, and increase the number of times the relay can be used for load switching during the electrical durability test.

[0065] In this embodiment, the embedded structure of the first embedding part 22 embedded in the first embedding groove 111 can be formed during the molding process of the composite contact block, or it can be formed after the composite contact block is molded. That is, the embedded structure of the first embedding part 22 embedded in the first embedding groove 111 is not limited by the processing technology. Since the edge of the main body 21 is provided with a first through hole 211, the first embedding part 22 extends from the hole wall of the first through hole 211 toward the direction close to the first embedding groove 111, which can reduce the amount of material used in the electrical contact layer 20 and save costs.

[0066] In one embodiment, referring to FIG4, the first embedding portion 22 includes a first embedding wall 221, which extends from the wall of the first through hole 211 toward the bottom of the first embedding groove 111. The first embedding wall 221 surrounds the first through hole 211, forming a first cavity 222, which communicates with the first through hole 211. It is understood that the first embedding portion 22 has a hollow structure. This reduces the amount of material used in the electrical contact layer 20, saving costs.

[0067] It should be noted that, referring to Figures 3 and 4, in this embodiment, the upper part of the first embedded wall 221 is hollowed out, so that the first embedded wall 221 is not easily burned by electric 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.

[0068] In one embodiment, referring to FIG4, the wall thickness of the first embedded wall 221 is uniform. It is understood that the thickness of the first embedded wall 221 is equal at all locations. Thus, while ensuring the bonding force between the first embedded wall 221 and the wall of the first embedded groove 111, the amount of material used in the electrical contact layer 20 can be reduced, saving costs.

[0069] In one embodiment, a plurality of first embedding slots 111 are provided, and all the first embedding slots 111 are arranged circumferentially at intervals along the first surface to form an annular shape.

[0070] Furthermore, referring to Figures 2, 4, 6, 8, 10, 12, 14, 16, 18, and 20, multiple first through holes 211 are provided, all of which are spaced apart circumferentially along the main body 21, and each first through hole 211 corresponds to one of the first embedding grooves 111. Multiple first embedding parts 22 are provided, each of which is connected to one of the first through holes 211 and is fitted into one of the first embedding grooves 111. Thus, by fitting multiple first embedding parts 22 into multiple first embedding grooves 111, the bonding force between the substrate 10 and the electrical contact layer 20 can be further improved, and after the composite contact and the spring are riveted, issues such as cracking and warping at the edges of the electrical contact layer 20 can be mitigated.

[0071] Optionally, the first embedding grooves 111 are provided at equal intervals along the circumference of the first surface. The first through holes 211 and the first embedding portions 22 are both provided at equal intervals along the circumference of the main body portion 21.

[0072] For the relatively thin electrical contact layer 20, in order to improve the overall bonding force between the substrate 10 and the electrical contact layer 20, in this embodiment, referring to Figures 21 to 28, a second embedding groove 112 is provided in the middle of the first surface. A second through hole 212 is provided in the middle of the main body 21, and the second through hole 212 is disposed opposite to the groove opening of the second embedding groove 112. The electrical contact layer 20 also includes a second embedding part 23 connected to the main body 21. The second embedding part 23 extends from the hole wall of the second through hole 212 toward the groove bottom of the second embedding groove 112, and the second embedding part 23 is disposed in the second embedding groove 112.

[0073] It is understandable that if the electrical contact layer 20 is thin, in addition to fitting the edge of the substrate 10 to the edge of the electrical contact layer 20, the middle part of the substrate 10 can also fit into the middle part of the electrical contact layer 20, thereby improving the overall bonding force between the substrate 10 and the electrical contact layer 20.

[0074] In one embodiment, referring to Figures 23 and 28, the second embedding portion 23 includes a second embedding wall 231 extending from the wall of the second through hole 212 toward the bottom of the second embedding groove 112. The second embedding wall 231 is disposed around the second through hole 212 to form a second cavity 232, which communicates with the second through hole 212. It is understood that the second embedding portion 23 has a hollow structure. This reduces the amount of electrical contact layer 20 used, saving costs.

[0075] It should be noted that, in this embodiment, the upper part of the second embedded wall 231 is hollow, so that the second embedded wall 231 is not easily burned by electric 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.

[0076] In one embodiment, referring to Figures 24 and 28, the second embedded wall 231 has a uniform wall thickness. It is understood that the thickness of the second embedded wall 231 is equal at all locations. Thus, while ensuring the bonding force between the second embedded wall 231 and the wall of the second embedded groove 112, the amount of material used in the electrical contact layer 20 can be reduced, saving costs.

[0077] In one embodiment, referring to Figures 11, 12, 15, 16, 19, and 20, the first embedding groove 111 and the second embedding groove 112 are conical in shape, as are the first embedding portion 22 and the second embedding portion 23. Specifically, the first embedding groove 111 and the second embedding groove 112 are conical grooves, and the first embedding portion 22 and the second embedding portion 23 are hollow conical bodies.

[0078] Of course, in other embodiments, the cross-sectional shape of the first embedding groove 111, the first embedding part 22, the second embedding groove 112, and the second embedding part 23 is square, the first embedding groove 111 and the second embedding groove 112 are square grooves, and the first embedding part 22 and the second embedding part 23 are square bodies. Alternatively, the cross-sectional shape of the first embedding groove 111, the first embedding part 22, the second embedding groove 112, and the second embedding part 23 is arc-shaped, the first embedding groove 111 and the second embedding groove 112 are arc-shaped grooves, and the first embedding part 22 and the second embedding part 23 are arc-shaped bodies.

[0079] In one embodiment, as shown in Figures 9, 11, 17, 19, 25, and 27, the side of the electrical contact layer 20 facing away from the substrate 10 has a contact surface. Optionally, the contact surface is a plane; or, the contact surface is an arc surface that protrudes in the direction 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 single plane or an arc surface.

[0080] Of course, the structural design can also be made on the side of the electrical contact layer 20 away from the substrate 10. Specifically, referring to Figures 1, 3, 5, 7, 13, 15, 21, and 23, the main body 21 has a first contact surface 213 and a second contact surface 214 on the side away from the substrate 10. The first contact surface 213 is located in the middle of the main body 21, and the second contact surface 214 is arranged around the first contact surface 213, with the first contact surface 213 protruding from the second contact surface 214.

[0081] Optionally, the first contact surface 213 and the second contact surface 214 are planar surfaces. Alternatively, the first contact surface 213 and the second contact surface 214 are arc surfaces, with the arc surfaces protruding in a direction away from the first surface.

[0082] When the composite contact of this embodiment is applied to a single contact product, the electric arc can be concentrated on the first contact surface 213, reducing the edge ablation of the second contact surface 214.

[0083] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, 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, and therefore should not be construed as a limitation of this application.

[0084] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0085] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0086] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0087] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, 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 possible implementation.

[0088] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0089] The embodiments described above are merely illustrative of several implementation methods of this application, and 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 those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A composite contact, comprising: include: The substrate has a first surface, and the edge of the first surface is provided with a first embedding groove; as well as An electrical contact layer includes a main body and a first embedded part. The main body is connected to the first embedded part. The main body is disposed on the first surface. The edge of the main body is provided with a first through hole. The first through hole is disposed opposite to the opening of the first embedded groove. The first embedded part extends from the hole wall of the first through hole toward the direction close to the first embedded groove. The first embedded part is disposed in the first embedded groove.

2. The composite contact of claim 1, wherein The first embedding part includes a first embedding wall, which surrounds the first through hole and forms a first cavity, which communicates with the first through hole.

3. The composite contact of claim 2, wherein, The thickness of the first embedded wall is uniform.

4. The composite contact of claim 1, wherein The first embedding groove is provided in multiple ways, and all the first embedding grooves are arranged circumferentially along the first surface to form a ring; The first through hole is provided in multiple ways, and all the first through holes are arranged at intervals along the circumference of the main body to form a ring, and all the first through holes are arranged in a one-to-one correspondence with all the first embedding grooves; The first embedding part is provided in multiple ways, and all the first embedding parts are connected to the hole walls of all the first through holes, and all the first embedding parts are embedded and fitted into all the first embedding slots in a one-to-one correspondence.

5. The composite contact of claim 4, wherein, The first embedding grooves are equally spaced along the circumference of the first surface; Both the first through hole and the first embedded part are equally spaced along the circumference of the main body.

6. The composite contact of claim 1, wherein The first embedding part and the first embedding groove are tapered in shape.

7. The composite contact of claim 1, wherein The first surface has a second embedding groove in the middle, and the main body has a second through hole in the middle, with the second through hole and the groove opening of the second embedding groove being opposite to each other. The electrical contact layer further includes a second embedded portion connected to the main body portion. The second embedded portion extends 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.

8. The composite contact of claim 7, wherein, The second embedding portion includes a second embedding wall that extends from the wall of the second through hole toward the bottom of the second embedding groove; the second embedding wall is arranged around the second through hole to form a second cavity, and the second cavity communicates with the second through hole.

9. The composite contact of claim 8, wherein, The second embedded wall has a uniform wall thickness.

10. The composite contact of claim 7, wherein, Both the second embedding groove and the second embedding part are tapered.

11. The composite contact according to any one of claims 1 to 10, wherein The composite contact block is formed.

12. The composite contact according to any one of claims 1 to 10, wherein The substrate is welded to the electrical contact portion.

13. The composite contact according to any one of claims 1 to 10, wherein The main body has a contact surface on the side opposite to the base.

14. The composite contact according to any one of claims 1 to 10, wherein The main body is provided with a first contact surface and a second contact surface on the side away from the base. The first contact surface is located in the middle of the main body, and the second contact surface is arranged around the first contact surface. The first contact surface protrudes from the second contact surface.

15. The composite contact according to any one of claims 1 to 10, wherein The composite contact is rivet-type, the substrate includes a rivet head and a rivet tail connected to the rivet head, and the electrical contact layer is disposed on the side of the rivet head away from the rivet tail.

16. A relay characterized by comprising: Includes the composite contact as described in any one of claims 1 to 15.

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