Pressure contact type electric interconnector and its making method

Abstract

A press-contact electrical interconnector for interconnecting an electronic circuit board and a subject electronic circuit board by being inserted between them is comprised of an insulative foam elastomer; an insulative rubber sheet having a section roughly in a U shape which covers the surface, one side and the backside of the insulative foam elastomer, while exposing the both end faces and the other side of the insulative foam elastomer; a plurality of conductive threads adhered and secured roughly in a U shape on the insulative rubber sheet and provided in proximity in a row arrangement at roughly equal pitches in the direction of from one end face toward the other end face of the insulative foam elastomer; and an insulative protective rubber sheet of high hardness provided on the other side of the insulative foam elastomer. Either one of the plurality of conductive threads on the surface of the insulative rubber sheet and the plurality of conductive threads on the backside thereof is made to be capable of contacting with the electronic circuit board, the other being capable of contacting with the subject electronic circuit board, or still furthermore an insulative deformation-restraining rubber sheet of high hardness is adhered and secured to the plurality of conductive threads on one side of the insulative rubber sheet.

Description

technical field [0001] The present invention relates to a pressure contact electrical interconnect for interconnecting a liquid crystal display and a circuit board or interconnecting a plurality of circuit boards, and an improved method of making such a device. Background technique [0002] There are various types of press-contact electrical interconnects, but recently a U-shaped metal wire interconnect is used for interconnecting a liquid crystal display and a circuit board or interconnecting multiple circuit boards. Such U-shaped metal wire interconnectors such as figure 1 Shown in is composed of an insulating foam elastic body 15, an insulating rubber sheet 2A and a plurality of conductive wires 3. The elastic body 15 is a roughly semi-elliptical block made of sponge silicone rubber material. The rubber sheet 2A has a substantially U-shaped cross section and is attached to the curved side and back of the peripheral surface of the insulating foam elastic body 15 to cover...

AI Technical Summary

Problems solved by technology

Therefore, when the electrical interconnector 17 is high, the matching effect is not good, and the interconnection between the electronic circuit board and the auxiliary electronic circuit board is very unstable, which often leads to non-conduction, so that the electronic circuit board and the auxiliary electronic circuit board are not interconnected. up, so the quality is not stable, the problem is very big

[0006] In addition, the general press-contact electrical interconnector is formed in the above-mentioned manner, the arrangement pitch of the conductive wires 3 is only as small as 50 microns to 100 microns, and the diameter of each conductive wire 3 is only as small as 30 microns to 40 microns, so Even if there is a small force pressing on the conductive wire 3, it will deform it, so that the failure rate of products such as mobile phones will increase, causing problems

In addition, since the electrical interconnector 17 is deformed by a small force, the interconnection between the electronic circuit board and the auxiliary electronic circuit board becomes very unstable, resulting in the problem that it cannot be used together.

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