Electroplated coating of terminal tape

Abstract

The utility model provides a kind of electroplating plating layer of terminal material band, including substrate and the conductive terminal being set on substrate, and the surface of conductive terminal including holding part, contact neck and contact end contact neck and contact end is provided with composite plating, composite plating includes the substrate layer, conductive metal layer, hardness reinforcing layer, wear-resistant metal layer and corrosion-resistant plating layer that sequentially electroplated from the surface of conductive terminal, and conductive metal layer includes first metal layer, second metal layer and third metal layer, by the way of multilayer electroplating on the outer surface of the holding part, contact neck and contact end of conductive terminal, composite plating is set, by sequentially electroplating substrate layer, conductive metal layer, hardness reinforcing layer, wear-resistant metal layer and corrosion-resistant plating layer from the surface of conductive terminal, the composite performance of hardness, corrosion resistance and conductivity is considered by the way of multilayer electroplating, compared with prior art, by reasonably setting electroplating plating layer, to reach the purpose that conductive terminal is wear-resistant, corrosion-resistant.

Description

Technical Field

[0001] This utility model relates to the field of terminal strip electroplating technology, and in particular to an electroplating coating for terminal strips. Background Technology

[0002] As electronic devices are used more frequently, they are also charged more often. This increased charging frequency means that the charging ports are plugged in and out too frequently. During the plugging and unplugging process, the contact between the male and female terminals will cause wear and tear on both of them. Over time, they are prone to damage or corrosion from accumulated sweat during handling.

[0003] In the prior art, in order to extend the service life of conductive terminals, the surface of the conductive terminals is generally electroplated. Common electroplating methods use materials such as copper, tin, tin alloy, gold, silver, palladium and other materials to electroplat the entire surface of the conductive terminals. However, excessively high insertion and removal frequency will still cause the conductive terminals to be less durable. Therefore, how to reasonably set the electroplating layer to achieve wear resistance and corrosion resistance is a technical problem that urgently needs to be solved. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, this utility model provides an electroplating coating for terminal strips, which solves the technical problem of how to reasonably set the electroplating coating to achieve wear resistance and corrosion resistance, since the commonly used electroplating method uses materials such as copper, tin, tin alloy, gold, silver, palladium and other materials to electroplat the entire surface of the terminals. However, excessively high insertion and removal frequency will still cause the terminal strips to be undurable.

[0006] (II) Technical Solution

[0007] The purpose of this utility model is to provide an electroplating coating for a terminal strip, which includes a substrate and a conductive terminal disposed on the substrate. The conductive terminal includes a holding portion, a contact neck, and a contact end. The surfaces of the contact neck and the contact end are provided with a composite coating. The composite coating includes a base layer, a conductive metal layer, a hardness reinforcing layer, a wear-resistant metal layer, and a corrosion-resistant coating sequentially electroplated from the surface of the conductive terminal. The conductive metal layer includes a first metal layer, a second metal layer, and a third metal layer. The surface of the holding portion is provided with a base layer and a first metal layer.

[0008] Preferably, a transition section is provided between the conductive terminal and the substrate.

[0009] Preferably, the conductive terminal further includes a crimping portion, and a retaining portion and a contact neck are provided between the crimping portion and the contact end, wherein the crimping portion is connected to the retaining portion, the retaining portion is connected to the contact neck, and the contact end is located at the tail end of the contact neck.

[0010] Preferably, the substrate layer is copper and has a thickness of 0.5 to 5 μm.

[0011] Preferably, the first metal layer and the third metal layer are one of pure gold, gold-cobalt alloy and gold-nickel alloy, and their thickness is 0.025 to 0.5 μm.

[0012] Preferably, the second metal is one of pure silver, silver palladium and silver antimony, and its thickness is 0.125 to 3 μm.

[0013] Preferably, the hardness-enhancing layer is one of nickel-tungsten or nickel-phosphorus alloy, and its thickness is 0.5 to 5 μm.

[0014] Preferably, the wear-resistant metal layer is pure platinum with a thickness of 0.125 to 3 μm.

[0015] Preferably, the corrosion-resistant coating is one of pure palladium or palladium-nickel alloy, and its thickness is 0.125 to 3 μm.

[0016] (III) Beneficial Effects

[0017] By applying a composite plating layer to the outer surfaces of the holding portion, contact neck, and contact end of the conductive terminal through multi-layer electroplating, specifically by sequentially electroplating a base layer, a conductive metal layer, a hardness-enhancing layer, a wear-resistant metal layer, and a corrosion-resistant plating layer on the surface of the conductive terminal, the multi-layer electroplating method achieves a combination of hardness, corrosion resistance, and conductivity. Compared with existing technologies, by rationally setting the electroplating layers, the conductive terminal achieves wear resistance and corrosion resistance. Attached Figure Description

[0018] The accompanying drawings are provided to further understand the technical solution of this utility model and constitute a part of the specification. They are used together with the embodiments of this utility model to explain the technical solution of this utility model, and do not constitute a limitation on the technical solution of this utility model.

[0019] Figure 1 This is a front view of the conductive terminals with the electroplated coating on the terminal strip;

[0020] Figure 2 This is a diagram of the composite plating structure of the electroplating layer on the terminal strip;

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Substrate; 2. Transition section; 3. Conductive terminal; 30. Press-fit part; 31. Holding part; 32. Contact neck; 33. Contact end; 4. Base layer; 5. Conductive metal layer; 50. First metal layer; 51. Second metal layer; 52. Third metal layer; 6. Hardness-reinforcing layer; 7. Wear-resistant metal layer; 8. Corrosion-resistant coating. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0024] The following is in conjunction with the appendix Figures 1 to 2 To further describe, this utility model discloses an electroplating layer for a terminal strip, including a substrate and conductive terminals 3 disposed on the substrate. During the electroplating process, the conductive terminals 3 undergo a multi-layer electroplating process by being pulled by the substrate. The conductive terminals 3 include a holding portion 31, a contact neck 32, and a contact end 33. A composite plating layer is formed on the surfaces of the holding portion 31, contact neck 32, and contact end 33 of the conductive terminals 3 by electroplating. When electroplating the base layer 4 and the first metal layer 51, the holding portion 31, contact neck 32, and contact end 33 of the conductive terminals 3 are used as the electroplating areas. The purpose is to electroplat the holding portion 31 only with the first metal layer 51 of the base layer 4 and the conductive metal layer 5, using copper as the base layer 4 and then passing through the first metal layer 51 made of pure gold to improve the overall metallic properties. Furthermore, the surfaces of the contact neck 32 and contact end 33 are sequentially electroplated with a base layer 4, a conductive metal layer 5, and a hardness-reinforcing layer 6. The wear-resistant metal layer 7 and the corrosion-resistant plating layer 8 are specifically designed with copper as the base layer 4. A layer of copper is deposited on the surface of the metal conductive terminal 3 to cover the pores formed during the processing of the metal conductive terminal 3 and to form a smooth surface. Then, three metal layers of gold, silver and gold are electroplated to form the conductive metal layer 5. This not only increases the heat resistance of the conductive terminal 3 but also effectively improves its conductivity. The hardness-reinforcing layer 6 is made of nickel-tungsten alloy to make the hardness of the plating layer reach HV500 or higher, thereby improving the wear resistance. The wear-resistant metal layer 7 is made of platinum and the corrosion-resistant plating layer 8 is made of palladium, both of which are corrosion-resistant and have strong wear resistance. The composite plating layer formed by the above combination not only significantly improves the hardness of the plating layer, but also greatly improves the wear resistance, corrosion resistance and discoloration resistance of the plating layer. This significantly increases the number of insertion and removal cycles of the plating layer, improves the service life of the plating layer and the charging efficiency, and achieves the goal of extending the service life of the charging terminal.

[0025] In addition, the conductive metal layer 5 includes a first metal layer 50, a second metal layer 51 and a third metal layer 52, and is electroplated on the substrate layer 4 in the order of the first metal layer 50, the second metal layer 51 and the third metal layer 52. In this embodiment, the first metal layer 50 and the third metal layer 52 are made of pure gold, and the second metal layer 51 is made of pure silver.

[0026] In a preferred embodiment, a transition section substrate 2 is provided between the conductive terminal 3 and the substrate. After electroplating is completed, the transition section substrate 2 needs to be cut to separate the conductive terminal 3 from the substrate.

[0027] In a preferred embodiment, the conductive terminal 3 further includes a crimping portion 30, and a retaining portion 31 and a contact neck 32 are provided between the crimping portion 30 and the contact end 33. The crimping portion 30 is connected to the retaining portion 31, the retaining portion 31 is connected to the contact neck 32, and the contact end 33 is located at the tail end of the contact neck 32.

[0028] In a preferred embodiment, the substrate 4 is copper with a thickness of 0.5 to 5 μm, such as 1 μm, 2 μm, 3 μm, 4 μm, etc.

[0029] In a preferred embodiment, the first metal layer 50 and the third metal layer 52 are one of pure gold, gold-cobalt alloy and gold-nickel alloy, and their thickness is 0.025 to 0.5 μm, such as 0.05 μm, 0.075 μm, 0.1 μm, 0.2 μm, 0.3 μm, 0.4 μm, etc.

[0030] In a preferred embodiment, the second metal is one of pure silver, silver palladium, and silver antimony, and its thickness is 0.125 to 3 μm, such as 0.5 μm, 1.5 μm, 2 μm, 2.5 μm, etc.

[0031] In a preferred embodiment, the hardness reinforcing layer 6 is one of nickel-tungsten or nickel-phosphorus alloys, and its thickness is 0.5 to 5 μm, such as 1.5 μm, 2 μm, 2.5 μm, 3 μm, 3.5 μm, 4 μm, 4.5 μm, etc.

[0032] In a preferred embodiment, the wear-resistant metal layer 7 is pure platinum, and its thickness is 0.125 to 3 μm, such as 0.5 μm, 1.5 μm, 2 μm, 2.5 μm, etc.

[0033] In the embodiments, the corrosion-resistant coating 8 is one of pure palladium or palladium-nickel alloy, and its thickness is 0.125 to 3 μm, such as 0.5 μm, 1.5 μm, 2 μm, 2.5 μm, etc.

[0034] The composite coating structure formed by the above method exhibits excellent wear resistance, corrosion resistance, and discoloration resistance after passing salt spray test, hardness test, contact resistance test, and adhesion test. In addition, the testing process and standards are all industry standards.

[0035] In summary, by applying a composite plating layer to the outer surfaces of the holding portion, contact neck, and contact end of the conductive terminal through multi-layer electroplating, specifically by sequentially electroplating a base layer, a conductive metal layer, a hardness-enhancing layer, a wear-resistant metal layer, and a corrosion-resistant plating layer onto the surface of the conductive terminal, the multi-layer electroplating method achieves a combination of hardness, corrosion resistance, and conductivity. Compared with existing technologies, by rationally setting the electroplating layers, the conductive terminal achieves wear resistance and corrosion resistance.

[0036] Although embodiments of the present invention have been shown above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications and variations to the above embodiments, but such modifications are all included within the broad scope of the foregoing disclosure, drawings and claims.

Claims

1. An electroplating coating for a terminal strip, comprising a substrate and conductive terminals disposed on the substrate, wherein the conductive terminals include a holding portion, a contact neck, and a contact end, characterized in that: The surfaces of the contact neck and contact end are provided with a composite plating layer, which includes a base layer, a conductive metal layer, a hardness-enhancing layer, a wear-resistant metal layer and a corrosion-resistant plating layer sequentially electroplated from the surface of the conductive terminal. The conductive metal layer includes a first metal layer, a second metal layer and a third metal layer. The surface of the retaining part is provided with a base layer and a first metal layer.

2. The electroplating coating of the terminal strip according to claim 1, characterized in that: A transition section is provided between the conductive terminal and the substrate.

3. The electroplating coating of the terminal strip according to claim 1, characterized in that: The conductive terminal further includes a crimping portion, and a retaining portion and a contact neck are provided between the crimping portion and the contact end, wherein the crimping portion is connected to the retaining portion, the retaining portion is connected to the contact neck, and the contact end is located at the tail end of the contact neck.

4. The electroplating coating of the terminal strip according to claim 1, characterized in that: The substrate is made of copper and has a thickness of 0.5 to 5 μm.

5. The electroplating coating of the terminal strip according to claim 1, characterized in that: The first and third metal layers are one of pure gold, gold-cobalt alloy, and gold-nickel alloy, and their thickness is 0.025 to 0.5 μm.

6. The electroplating coating of the terminal strip according to claim 1, characterized in that: The second metal is one of pure silver, silver palladium, and silver antimony, and its thickness is 0.125 to 3 μm.

7. The electroplating coating of the terminal strip according to claim 1, characterized in that: The hardness-enhancing layer is one of nickel-tungsten or nickel-phosphorus alloys, and its thickness is 0.5 to 5 μm.

8. The electroplating coating of the terminal strip according to claim 1, characterized in that: The wear-resistant metal layer is pure platinum, and its thickness is 0.125 to 3 μm.

9. The electroplating coating of the terminal strip according to claim 1, characterized in that: The corrosion-resistant coating is one of pure palladium or palladium-nickel alloy, and its thickness is 0.125 to 3 μm.

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