| 摘要 |
<p>The present invention provides an electroconductive contact unit which includes needle member guide holes formed in a plate made of high strength material such as metallic materials. The mechanical strength of the parts of the holder defining the needle member guide holes are increased in mechanical strength so that the positional precision of the tip of each electroconductive needle member can be improved. Even when electroconductive metallic material is used as a readily available high strength material, by forming an insulating film over the inner circumferential surface of each needle member guide hole which guides the corresponding needle member, the needle member can be slidably disposed therein without breaking insulation. In particular, when the plate is made of electroconductive material, and an insulating film is formed over the outer surface of the holder as well as over the inner circumferential surface of each through hole which guides the needle member and receives a coil spring therein, simply by grounding the plate, it is possible to electromagnetically shield the electroconductive needle member and the compression coil spring inside each through hole, and make them immune to noises. <IMAGE></p> |
