Patent ID: 9152017
Filing Date: 2015-10-06
Classification: G03B,Y10T

Abstract:
1. A rotational joint, comprising: a first member having a pair of sidewalls that face each other; a second member having a pair of plate members each disposed proximate to outside faces of the pair of sidewalls; a rotational shaft member extending into shaft holes provided in each of the plate members and the sidewalls; a rotational biasing member that is disposed around the rotational shaft member, one end of the rotational biasing member being engaged with a stop member that is provided on an interior wall of one of the pair of sidewalls of the first member; a stop ring, the other end of the rotational biasing member is engaged with the stop ring, the stop ring being fixed to the rotational shaft member; and the first member being rotatable with respect to the rotational shaft member, the rotational shaft member being fixed to the second member, the rotational biasing member providing a rotational biasing force about the rotational shaft member between the first and second members, and the rotational biasing member and the stop ring being disposed between the sidewalls; wherein a wiring hole is provided in one of the sidewalls of the first member and an arcuate notch that corresponds to a locus of the wiring hole when the joint is rotated is provided in the plate member of the second member that faces the wiring hole, and a wire in the first member extends through the wiring hole and the arcuate notch to the second member.