Connector terminal

A connector terminal, terminal technology, applied in the direction of contact parts, etc., can solve the problems of large insertion force and removal force, terminal sliding is not very good, surface state is easy to change with time, etc.

Inactive Publication Date: 2003-10-08
MITSUBISHI SHINDOH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the prior art terminals composed of Sn-plated Cu alloy sheets, since the surface layers of the male and female terminals are softer Sn-plated layers, that is, identical to each other, the sliding of the terminals is not very good when the connectors are connected, etc. , therefore, considerable insertion and removal forces are required
In addition, when exposed to high temperatures such as around an engine, the Sn-plated layer of the base material and the Cu alloy dissipate heat from each other, making the surface state prone to change over time, and at the same time, there is a risk of fluctuations in contact resistance and fastening force

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The male terminal 1 and the female terminal 2 of Embodiment 1 are manufactured in the manner described below.

[0052] Copper alloy sheets (substrate materials) A and B shown in Table 1 were subjected to alkaline degreasing, electrolytic degreasing and activation treatment, and under the following conditions, after forming Cu layer 6 by electroplating Cu substrate, a pure Sn layer can be formed by Sn finishing plating 7, in order to obtain Sn-plated Cu alloy sheet. Next, the sheets were passed through a reducing atmosphere at temperatures of 250° and 300° for 10-80 seconds to perform reflow treatment and form a Cu-Sn alloy layer 8, and obtain surface-hardened electroplated Cu alloy sheets shown in Table 2.

[0053] Cu

Alloy

thickness

(mm)

Composition (wt%)

feature

Non-Cu component

Cu and inevitable

free from impurities

tensile strength

(N / mm 2 )

extend

Elongation

Hardness (Hv)

...

Embodiment 2

[0062] A method of manufacturing the male terminal 1 and the female terminal 2 of Embodiment 2 will be described below.

[0063] Respectively anneal Sn-plated Cu alloy sheets C and D at 200-220°C for 30-10000 seconds, reflow Sn-plated Cu alloy sheets E and F, and hot-dip Sn-plated Cu alloy sheets G and H, so that A Cu-Sn alloy layer was obtained and quenched. As shown in Table 3, following the quenching treatment, the thickness of the pure Sn layer 7 and the thickness of the Cu—Sn alloy layer 8 were measured.

[0064] Utilize the electroplated Cu alloy plate can be manufactured with such as figure 1 The male terminal 1 and the female terminal 2 of the shape shown, and the respective sliding portions of the male terminal 1 and the female terminal 2 determine the difference in Vickers hardness value (HV) of the two. Table 3 shows these results. The maximum load was measured 10 times for each different combination during the insertion of the male terminal 1 into the female ter...

Embodiment 4

[0078] The electroplating condition of embodiment 4 [Ni electroplating condition]

[0079] Plating bath composition: 240g / l nickel sulfate, 45g / l nickel chloride, 30g / l boric acid; plating bath temperature: 35°C; current density: 2A / dm 2 [2%-Sn Cu alloy plating conditions]

[0080] Plating tank composition: 50g / l tin sulfate, 45g / l sulfuric acid, 1g / l TopFleet SC-S (trademark of Okuno Chemical Industry Co., Ltd.), 10ml / l Top Fleet Sc-R, 0.3ml / l Top Fleet Sc- 1; Plating tank temperature: 20°C, current density: 2A / dm 2 [Electroplating 19%-SnNi Alloy Conditions]

[0081] Plating bath composition: 500ml / l Pyroalloy SN Starter (trademark of Kagaku Sanyo Co., Ltd.), 20ml / l Pyroalloy SN makeup, 25g / l esterified tin; plating bath temperature: 40°C, current density: 1A / dm 2 [Electroplating 26%-SnNi Alloy Conditions]

[0082] Plating bath composition: 500ml / l Pyroalloy SN Start, 20ml / l Pyroalloy SN makeup; plating bath temperature: 40°C, current density: 1A / dm 2 [Conditions for Ag ...

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Abstract

The connector terminal of the present invention is made of an electroplated Cu alloy plate, and a pair of mutually engaged male terminals 1 and female terminals 2 are provided; wherein in the mutual sliding part of the male terminal 1 and the female terminal 2, the dimension of one of the terminals The Vickers hardness of the other terminal is in the range of 60-700HV, the Vickers hardness of the other terminal is in the range of 20-150HV, and the difference between the Vickers hardness of the two terminals is 15HV or more. The result is low insertion force, removal force and good thermal resistance in addition to stable contact resistance.

Description

technical field [0001] The present invention relates to a connector terminal produced from a thin metal plate in which pure metal or alloy is finely plated and used for connectors of automobiles and the like. Background technique [0002] Connector terminals for electric wire connectors and the like generally used in automobiles and the like are produced by press-forming, punching, or bending a Cu (copper) alloy thin plate or the like. In this case, for the resulting terminal, in order to obtain satisfactory electrical connection characteristics and the like, a pure metal-plated or alloy-plated metal sheet is often used, especially a Sn (tin)-plated or Sn-alloy-plated metal sheet is used. These connector terminals consist of interengaging male and female terminals made of metal tin plate. [0003] However, techniques involving connectors and other connector terminals still suffer from the problems described below. [0004] In recent years, the number of circuits used in el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01R13/03
CPCH01R13/03
Inventor 铃木竹四佐藤进英榊原直男森哲人
Owner MITSUBISHI SHINDOH CO LTD
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