| 摘要 |
A universal joint including a ball joint member of synthetic resin having four ridges formed on the outer surface of a ball portion and four guide furrows formed between the ridges when the joint member is in an assembled state, and two metal yokes each having two bifurcated arms at one end, the two arms of one of the yokes being fitted in two symmetrically positioned guide furrows of the ball joint member, the two arms of the other yoke being fitted in the other two symmetrically positioned guide furrows of the ball joint member. The ball joint member is divided into a half segment toward one of the yokes and a half segment toward the other yoke, a spring member being provided in a cavity formed in the opposed faces of the half segments for biasing the half segments away from each other, an electrically conductive member being held between the two half segments and projecting into the guide furrows in pressing contact with the arms of the two yokes.
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