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Electrical contact, connector terminal pair, and connector pair

A technology of connector terminals and electrical contacts, applied in the direction of connection, parts and circuits of connecting devices, can solve the problems of increased insertion force, high friction coefficient, condensation, etc., and achieve high connection reliability and low insertion. force effect

Active Publication Date: 2019-06-07
AUTONETWORKS TECH LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, tin is very soft and has the property of easily causing condensation, so the contact portion of the tin-plated connector terminal has a high friction coefficient, and the insertion force required to fit the connector terminal by insertion becomes large.

Method used

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  • Electrical contact, connector terminal pair, and connector pair
  • Electrical contact, connector terminal pair, and connector pair
  • Electrical contact, connector terminal pair, and connector pair

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0073] Hereinafter, the present invention will be described in detail using examples.

[0074] [Preparation of plating samples]

[0075] Tin-plated samples, tin / palladium-plated samples, and nickel-plated samples were produced by electroplating on the surface of a clean copper substrate. Table 1 shows the film thicknesses of the respective plating layers. Regarding the tin / palladium-plated samples, after the nickel-plated layer was formed as the base layer, the palladium-plated layer and the tin-plated layer were sequentially formed with the described film thicknesses.

[0076] By further heating the tin / palladium-plated sample at 300° C., an alloy between tin and palladium progressed, and this was used as a tin-palladium alloy sample. By observing the cross-section and surface of the obtained sample with a scanning electron microscope (SEM), it can be confirmed that both the alloy part and the tin part are exposed on the outermost surface of the tin-palladium alloy sample, ...

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Abstract

The present invention provides: an electrical contact which is capable of achieving a good balance between low coefficient of friction and low contact resistance even after sliding; and a connector terminal pair and a connector pair, each of which is provided with this electrical contact. An electrical contact that is composed of a first contact 10 and a second contact 20, which are capable of forming an electrical contact with each other. This electrical contact is configured such that: the first contact 10 comprises an alloy-containing layer 14 which has an alloy part 14a that is formed of an alloy containing tin and palladium and a tin part 14b that is formed of tin or an alloy which has a higher ratio of tin to palladium than the alloy part 14a, and wherein both the alloy part 14a andthe tin part 14b are exposed in the outermost surface; and the second contact 20 comprises a dissimilar metal layer 22 in the outermost surface, said dissimilar metal layer 22 having a higher hardnessthan the alloy-containing layer 14, while being formed of a metal that contains neither tin nor palladium. According to the present invention, a connector terminal pair and a connector pair are configured to comprise this electrical contact.

Description

technical field [0001] The present invention relates to an electrical contact, a connector terminal pair and a connector pair, and in further detail, relates to an electrical contact having an alloy-containing layer containing palladium on one surface of a pair of contacts electrically contacting each other, and relates to an electrical contact having an alloy layer containing palladium. Connector terminal pairs and connector pairs of such electrical contacts. Background technique [0002] It is required to exhibit low contact resistance at the contact portion of a connector terminal connected to an electric component of an automobile. In general, a tin-plated layer is often formed on the surface of a connector terminal. The tin plating imparts very low contact resistance, enabling good electrical connections. However, tin is very soft and has the property of easily causing condensation. Therefore, the contact portion of the tin-plated connector terminal has a high frictio...

Claims

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Application Information

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IPC IPC(8): C25D7/00C25D5/10C25D5/50H01R13/03
CPCC25D5/10C25D5/50C25D7/00H01R13/03H01R13/187
Inventor 加藤晓博渡边玄土屋善康
Owner AUTONETWORKS TECH LTD
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