Patent ID: 8556639

Claim:
An electric contact comprising: a first contact member, having conductivity, and which has an external cylinder portion with an opening end, a second contact member, having conductivity, and which has an internal contact portion to be inserted into the external cylinder portion through the opening end from a first end of the internal contact portion so that the second contact member is thereby interlinked with the first contact member in an extensible manner, and an urging member which, when the internal contact portion is inserted into the external cylinder portion, urges the first contact member and the second contact member toward a direction to separate the first contact member and the second contact member, wherein the internal contact portion has a taper shape which expands from the first end of the internal contact portion toward a second end of the internal contact portion, to thereby provide a taper shape surface of the internal contact portion, and when the internal contact portion is inserted into the external cylinder portion, the internal contact portion moves in the external cylinder portion with the taper shape surface contacting an internal surface of the opening end of the external cylinder portion, so that the internal contact portion thereby conducts with the external cylinder portion as the internal contact portion moves in the external cylinder portion.