JPS60241680A - Connector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Yu' eyes and years! - The invention relates to an improvement in the structure of a connector used for electrical m-connection.

1 Bean 1" 211 In recent years, with the development of electrical and electronic devices, there has been a demand for electronic components mounted in these devices to be smaller and lighter, have higher performance, have a longer lifespan, and ensure high reliability. By the way, the shape, structure, material, and surface treatment of connectors used to make electrical connections must be improved to meet these requirements. ! Improvements and studies are being made from various perspectives such as:

In conventional connectors, in order to achieve high connection reliability, that is, sufficient electrical connection, 01 has a strong spring property that allows it to be tightly coupled to the parts to be connected.
1jC, or (2) configuring a relatively large connector to provide sufficient elasticity. However, when increasing the springiness,
There is a problem in that the insertion/extraction force to the part to be connected becomes large, reducing work efficiency. Another drawback is that connection reliability deteriorates significantly due to repeated insertion and removal.

In particular, in multi-bin connectors, the overall insertion/extraction force becomes extremely large, and as a result, these problems become more pronounced.

On the other hand, (1) When increasing the size of the connector, it is difficult to meet the demands for reduction in size and weight, that is, high-density packaging, and there is also a drawback in that it is disadvantageous in terms of cost.

Achieve! ``I■ Therefore, an object of the present invention is to provide a connector that can provide electrical connections with high reliability, has a small insertion/extraction force and is therefore excellent in workability, and has little deterioration of characteristics even after repeated insertion/extraction. It's about doing.

Group 11111 This invention can be summarized as follows: When at least an electrically connected portion is deformed by applying an external force in the operating temperature range, stress-induced martensite is generated, and when the external force is removed, the martensite phase disappears. This connector is characterized in that it is made of a material that undergoes thermoelastic martensitic transformation, thereby exhibiting superelastic behavior. That is, tI
By utilizing the i-elastic behavior, it is intended to ensure the thermal adaptability of the electrical M thread and to reduce the insertion/extraction force.

Since it is sufficient that "at least the electrically connected part" be made of a material that causes thermoelastic martensitic transformation as described above, the entire part may be made of such a material. Needless to say.

In addition, since any material that undergoes thermoelastic martensitic transformation that exhibits the above-mentioned superelastic behavior in the operating temperature range is sufficient, it is sufficient that the inverse M temperature exhibits thermoelastic martensitic transformation that is lower than the operating temperature i11. For example, various known alloy materials such as C1i-AfL-Zn alloy, CLI-/1--Nl alloy, and iRuiHaN + Wang+ alloy can be used.

Preferably, for example, All, 3n, Pb
.

1 selected from the group consisting of N1, Zn and A11l
At least the surface of the part where the electrical connection is made may be coated with more than one type of metal, and by coating with these various metals, it is possible to further improve the reliability of the electrical connection against weak currents. Become.

oiq1 FIG. 1 is a perspective view for explaining a first embodiment of the present invention. Here, a connector 3 for making a connection in a through hole 2 of a printed circuit board 1 is shown. That is, the connector 3 has branched springy parts 3a and 3b, and the springy properties of the branched parts 3a and 3b ensure electrical connection when inserted into the through hole 2 in the direction of arrow X in FIG. and is connected to the conductor pattern 4 formed in connection with the through hole 2.

Although the shape of the connector 3 shown in FIG. 1 is already known,
Conventional connectors 3 of this type were made of metal materials such as phosphor bronze, and had low springiness, making insertion and removal difficult.
- The substrate 1 was likely to be damaged.

In the connector 3 shown in FIG.
U-14 weight% to m3.7 heavy base% N1 When manufactured from alloy, even if a large number of connectors 3 are mixed into a large number of through holes 2 at the same time, the 1r operation is extremely easy (
It was also confirmed that the electrical connection was sufficient. In addition, W! When it was returned, no deterioration in characteristics was observed.

FIGS. 2 and 3 show a fl view and a front W4 view of a connector to which a second embodiment of the present invention is applied. Here, a connector 13 slit h 13 a is provided, and by adding r9 to the pudding i/1 a, a joint portion 13 b of both slits of the slit 13 a is formed.

13c is configured to have spring properties.

In the connector 13, as shown in FIG. 3, the cable 15 having the sheath 14 is inserted into the slit 13a with F<19 sheath 1/l to ensure electrical connection. The connector 13 has conventionally been made of a metal material such as brass or phosphor bronze, but there has been a problem in that it tends to cause connection failures in some parts.

On the other hand, in this embodiment, the connector 13 is Qu-26,
With 2311%Zn-4,3fII%AfL alloy plate,
The slit 13a may be shaped slightly narrower or the slit 13 may be
When I used a tube that was formed by punching so that the entrance of a was narrow, there were no electrical connection defects.

FIG. 4 is a schematic side view for explaining a third embodiment of the present invention. Here, a pin-type connector 23 is shown, and in this connector 23, a connecting portion 2 at the tip
3a...23d are constructed so as to have spring properties. In this type of connector 23, the connecting portion 23
When a...23d was used with 80 plating on N1-44.7% by weight T1 alloy wire, there was almost no deterioration in spring properties, and the electrical connection condition was also good. was confirmed. Furthermore, it was confirmed that there was almost no deterioration of the spring properties after repeated insertion and removal.

In addition, use the connector shown in Figure 4 of the cylinder to connect 7'Z231. Figure 5 shows the stress strain characteristics of the Ni-44,71%-1B gold wire used. The area shown has a somewhat flat characteristic.Therefore, it can be seen that it is preferable to crotch the connector 23 for use in the area shown by A, since the stress will not rise suddenly even if the strain is increased.

As described above, according to the present invention, when at least the electrically connected portion is deformed by applying an external force at the working temperature, stress is induced and tensile occurs. It is made of a material that exhibits a mature elastic martensitic transformation where the martensitic phase disappears when an external force is removed, resulting in superelastic behavior. The apparent recovery strain of the material can be designed to be large, making it possible to dramatically improve the reliability of electrical connections. Furthermore, since it utilizes Showa's elastic behavior, the Young's modulus is small and stress does not increase much even when strain increases, so the insertion/extraction force can be reduced, and workability can therefore be improved. Become.

Furthermore, since the strain M that can be completely recovered from deformation is extremely large, at least 10 times that of ordinary metal materials, it is possible to prevent performance deterioration due to repeated insertion and removal to iV*.

This invention is for IC or LSJ, printed circuit board,
Note [1] that it can be applied to various electronic connector crotches for flat cables or ribbon cables.

[Brief explanation of drawings]

FIG. 1 is a perspective view for explaining a first embodiment of the invention. FIGS. 2 and 3 are a perspective view and a front view for explaining a second embodiment of the invention. FIG. 4 is a schematic side view for explaining a third embodiment of the invention. FIG. 5 is a diagram showing stress strain characteristics when Ni-44, 7F151% Ti alloy powder is used in the example shown in FIG. 4. In the figure, 1 is a printed circuit board provided with through holes, 2 is a through hole, 3 is a connector, 3a and 3b are parts for electrical connection, 13 is a connector, 23 is a connector, 2.3a...23d indicates a part that makes an electrical connection. Patent applicant: Sumitomo Electric Isai Co., Ltd. Representative: Hisabe Fukami (and two others)

Claims (4)

[Claims] (1) At least the electrically connected part produces stress-induced martensite when deformed by applying an external force in the operating temperature range, and when the external force is removed, the martensite phase disappears and exhibits superelastic behavior. A connector characterized in that it is made of a material that undergoes thermoelastic martensitic transformation. (2) At least the surface of the part to be electrically connected is
The connector according to claim 1, coated with one or more metals selected from the group consisting of AU1Sn-, PbSN'NZn, and 80. (3) The connector according to claim 1 or 2, which is used for connection in a through hole of a through hole board. (4) The connector according to claim 1 or 2, which is used for connecting a flat cable or a ribbon cable.