Patent ID: 6556033
Filing Date: 2003-04-29
Classification: G01R

Abstract:
An electroconductive contact unit assembly, comprising a holder for guiding an electroconductive needle member for contacting an object so as to be axially moveable into and out of a through hole, and a compression coil spring received in the through hole coaxially with respect to the electroconductive needle member so as to resiliently urge the electroconductive needle member out of the through hole, characterized by that:the holder comprises an electroconductive metallic plate member and an insulating plate member placed one over the other; and the through hole comprises a needle member guide hole for guiding the electroconductive needle member, a retaining shoulder for retaining the electroconductive needle member therein against a spring force of the compression coil spring, and a coil spring support hole for receiving the compression coil spring; the needle member guide hole and retaining shoulder being formed in the electroconductive metallic plate member, an insulating film being formed on an inner circumferential surface of the needle guide hole and retaining shoulder, and the coil spring support hole being formed in the insulating plate member.