Terminal and electrical connection structure

Abstract

The utility model discloses a terminal and an electric connection structure, including terminal body and contact post, the terminal body has the plug cavity that is enclosed by at least two elastic arms, the diameter of plug cavity gradually reduces along from the plug inlet end to the plug cavity bottom direction, the contact post is fixedly connected on at least two elastic arms, and is located the smallest position of plug cavity diameter, the contact post has convex arc conductive surface, convex arc conductive surface is towards terminal axis direction and partially protrudes in the inner wall of plug cavity, and this terminal design emphatically solves the problem of the spark of terminal to the plug, the ablation, the electricity problem of being connected, and the problem of terminal damage needs to replace the assembly, just need to increase the new contact post of embedding on the elastic arm, and the structure of the convex arc conductive surface that increases, makes the conductive performance of terminal and the plug terminal between the plug-in after more excellent.

Description

Technical Field

[0001] This utility model relates to the field of electrical connection technology, and more specifically, to a terminal and an electrical connection structure. Background Technology

[0002] In the field of electrical connections, many electrical circuits require connectors. Currently, most connections are achieved by plugging in and out of connectors, especially in high-current, large-diameter wire harnesses, such as the charging guns and charging sockets used in rapidly developing new energy vehicles. During use, plug-in terminals need to be inserted into connectors, resulting in a large contact area. Frequent insertion and removal can lead to arcing, burning, and short circuits, as well as wear and uneven wear on the plug-in terminals. Damaged terminals not only reduce their lifespan but also cause poor contact and reduced conductivity, affecting normal use and potentially causing safety accidents. Furthermore, damaged terminals often require complete replacement.

[0003] Therefore, there is an urgent need to develop a new terminal structure solution to address the above problems in the existing technology. Utility Model Content

[0004] One objective of this invention is to provide a new technical solution for terminals and an electrical connection structure to solve the problems of wear, poor contact, and poor conductivity of plug terminals after frequent plugging and unplugging.

[0005] According to a first aspect of the present invention, a terminal is provided, comprising a terminal body and a contact post. The terminal body has a insertion cavity formed by at least two elastic arms, the diameter of which gradually decreases from the insertion inlet end to the bottom of the insertion cavity. The contact post is fixedly connected to the at least two elastic arms and is located at the position where the diameter of the insertion cavity is smallest. The contact post has a convex arc-shaped conductive surface, which faces the terminal axis and partially protrudes outward from the inner wall of the insertion cavity.

[0006] Optionally, the contact post is a conductor.

[0007] Optionally, the surface of the conductor has a plating.

[0008] Optionally, the coating material is at least one of zinc or silver.

[0009] Optionally, the contact post is made of copper or a copper alloy.

[0010] Optionally, the contact post is machined from a metal rod.

[0011] Optionally, the end of the contact post that is away from the convex arc-shaped conductive surface is coplanar with the outer surface of its corresponding elastic arm.

[0012] Optionally, the contact post is riveted or interference-fitted to the elastic arm.

[0013] Optionally, the free end of the elastic arm is provided with an axially extending mounting hole, and the contact post has a riveting part with a diameter larger than that of the mounting hole, the riveting part being radially riveted into the mounting hole.

[0014] This utility model also provides an electrical connection structure, including any of the terminals described above, and further including a mating terminal that is inserted into the insertion cavity of the terminal, wherein the outer wall of the mating terminal abuts against and is electrically connected to a convex arc-shaped conductive surface protruding from the inner wall of the insertion cavity.

[0015] The beneficial effects of this utility model are as follows:

[0016] The flexible arm of this utility model terminal is fixedly connected to a contact post. The contact post has a convex arc-shaped conductive surface that faces the terminal axis and partially protrudes outward from the inner wall of the insertion cavity. During use, the insertion terminal is inserted into the mating terminal. The small contact area between the convex arc-shaped conductive surface and the mating terminal effectively avoids arcing, burning, and short circuits during frequent insertion and removal. This reduces wear and uneven wear on the insertion terminal, extends the terminal's service life, and the added convex arc-shaped conductive surface structure also improves the conductivity between the terminal and the mating terminal. After long-term wear of the contact post, it can be replaced by re-embedding the contact post on the flexible arm, reducing maintenance costs.

[0017] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.

[0019] Figure 1 This is a three-dimensional structural diagram of the terminal of this utility model;

[0020] Figure 2 This is a structural schematic diagram of the cross-section of the terminal of this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the terminal body of this utility model.

[0022] The diagram is marked as follows:

[0023] 10. Terminal body; 11. Flexible arm; 111. Assembly hole; 20. Contact post; 21. Convex arc-shaped conductive surface; 22. Riveting part. Detailed Implementation

[0024] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0025] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0026] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0027] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0028] According to the first aspect of this utility model, as Figures 1-3 As shown, a terminal is provided, including a terminal body 10 and a contact post 20. The terminal body 10 has a plug cavity formed by at least two elastic arms 11. The diameter of the plug cavity gradually decreases from the plug inlet end to the bottom of the plug cavity. The contact post 20 is fixedly connected to the at least two elastic arms 11 and is located at the position where the diameter of the plug cavity is the smallest. The contact post 20 has a convex arc-shaped conductive surface 21. The convex arc-shaped conductive surface 21 faces the terminal axis and partially protrudes outward from the inner wall of the plug cavity.

[0029] In the field of electrical connections, many electrical circuits require connectors. Currently, most connections are achieved by plugging in and out of connectors, especially in high-current, large-diameter wire harnesses, such as the charging guns and charging sockets used in rapidly developing new energy vehicles. During use, plug-in terminals need to be inserted into connectors, resulting in a large contact area. Frequent insertion and removal can lead to arcing, burning, and short circuits, as well as wear and uneven wear on the plug-in terminals. Damaged terminals not only reduce their lifespan but also cause poor contact and reduced conductivity, affecting normal use and potentially causing safety accidents. Furthermore, damaged terminals often require complete replacement.

[0030] The flexible arm 11 of this utility model terminal is fixedly connected to a contact post 20. The contact post 20 has a convex arc-shaped conductive surface 21 that faces the terminal axis and partially protrudes outward from the inner wall of the insertion cavity. During use, the insertion terminal is inserted into the mating terminal. The convex arc-shaped conductive surface 21 has a small contact area with the mating terminal. In frequent insertion and removal actions, it effectively avoids arcing, burning, and short circuits, reduces wear and uneven wear on the insertion terminal, and extends the service life of the terminal. The added convex arc-shaped conductive surface 21 structure can also improve the conductivity between the terminal and the mating terminal. After the contact post 20 wears out from long-term insertion, it can be replaced by re-embedding the contact post 20 into the flexible arm 11, which reduces maintenance costs.

[0031] In some embodiments, the contact post 20 is a conductor.

[0032] The contact post 20, which acts as a conductor, is in contact with both the mating terminal and the terminal body 10. While providing clamping force, it also conducts electricity, thereby increasing conductivity.

[0033] In some embodiments, the surface of the conductor has a plating.

[0034] By applying a plating layer, surface wear of the conductor can be prevented, ensuring conductivity. Preferably, the plating material is one of the following: gold, silver, nickel, tin, zinc, tin-lead alloy, silver-antimony alloy, palladium, palladium-nickel alloy, graphite silver, graphene silver, and silver-gold-zirconium alloy. As the metal contacts require frequent insertion and removal, the plating layer needs to be made of a wear-resistant metal to significantly increase the contact's lifespan. Considering the conductivity and stability of the aforementioned metals, they are superior to copper or copper alloys, enabling the conductive ball bearings to achieve better electrical performance and a longer service life.

[0035] In some embodiments, the coating material is at least one of zinc or silver.

[0036] The conductivity and stability of at least one of the metals, zinc or silver, are superior to those of copper or copper alloys, which enables the convex arc-shaped conductive surface 21 of the contact post 20 to obtain better electrical performance and a longer service life.

[0037] In some embodiments, the contact post 20 is made of copper or a copper alloy.

[0038] In the field of electrical connections, copper or copper alloys are used for current conduction. The contact post 20 made of copper or copper alloy has high conductivity, good ductility and thermal conductivity.

[0039] 1. In some embodiments, the contact post 20 is machined from a metal rod.

[0040] By machining metal rods, excess material can be precisely removed according to design requirements, maximizing the use of raw materials, reducing waste, lowering costs, and ensuring machining accuracy. Machining equipment such as lathes and milling machines, through precise control and operation, can achieve high-precision machining of the contact post 20, ensuring that the dimensions and shape of the contact post 20 after forming meet the design requirements for fixed connection with the elastic arm.

[0041] In some embodiments, such as Figure 1 and Figure 2 As shown, the end of the contact post 20 that is away from the convex arc-shaped conductive surface 21 is coplanar with the outer surface of its corresponding elastic arm 11.

[0042] The smooth connection and coplanarity with the outer surface of the elastic arm 11 make the overall appearance more aesthetically pleasing and facilitate external visual observation of the maximum depth of the contact post 20 when it is embedded, while also saving on the material cost of the contact post 20.

[0043] In some embodiments, such as Figures 1-2 As shown, the contact post 20 is riveted or interference-fitted to the elastic arm 11.

[0044] Riveting or interference fit connection makes the connection between contact post 20 and elastic arm 11 more stable, thereby ensuring the stability of the connection between the terminal and the mating terminal through contact post 20 and ensuring electrical safety.

[0045] In some embodiments, such as Figures 1-3 As shown, the free end of the elastic arm 11 is provided with an axially extending assembly hole 111, and the contact post 20 has a riveting part 22 with a diameter larger than that of the assembly hole 111. The riveting part 22 is radially riveted into the assembly hole 111.

[0046] The riveting part 22 is radially riveted into the assembly hole 111, making the connection between the contact center and the assembly hole 111 more stable, preventing the contact post 20 from falling out of the assembly hole 111, thereby ensuring the stability of the connection between the terminal and the mating terminal through the contact post 20 and ensuring electrical safety.

[0047] This utility model also provides an electrical connection structure, including any of the terminals described above, and further including a mating terminal that is inserted into the mating cavity of the terminal, wherein the outer wall of the mating terminal abuts against and is electrically connected to a convex arc-shaped conductive surface 21 that protrudes from the inner wall of the mating cavity.

[0048] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A terminal, characterized in that, Includes terminal body and contact post, The terminal body has a plug cavity formed by at least two elastic arms. The diameter of the insertion cavity gradually decreases from the insertion inlet end towards the bottom of the insertion cavity. The contact post is fixedly connected to the at least two elastic arms and is located at the position where the diameter of the insertion cavity is the smallest. The contact post has a convex arc-shaped conductive surface. The convex arc-shaped conductive surface faces the axis of the terminal and partially protrudes outward from the inner wall of the insertion cavity.

2. A terminal according to claim 1, characterized in that, The contact post is a conductor.

3. A terminal according to claim 2, characterized in that, The surface of the conductor has a plating.

4. A terminal according to claim 3, characterized in that, The coating material is at least one of zinc or silver.

5. A terminal according to claim 1, characterized in that, The contact post is made of copper or a copper alloy.

6. A terminal according to claim 5, characterized in that, The contact post is machined from a metal rod.

7. A terminal according to claim 1, characterized in that, The end of the contact post that is away from the convex arc-shaped conductive surface is coplanar with the outer surface of its corresponding elastic arm.

8. A terminal according to claim 1, characterized in that, The contact post is riveted or interference-fitted to the elastic arm.

9. The terminal according to claim 8, characterized in that, The free end of the elastic arm is provided with an axially extending assembly hole, and the contact post has a riveting part with a diameter larger than that of the assembly hole. The riveting part is fitted into the assembly hole by radial riveting.

10. An electrical connection structure, characterized in that: The device includes a terminal as described in any one of claims 1-9, and further includes a mating terminal that is inserted into the mating cavity of the terminal, wherein the outer wall of the mating terminal abuts against and is electrically connected to a convex arc-shaped conductive surface protruding from the inner wall of the mating cavity.

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