Rotational joint

摘要

A rotational joint is provided that comprises a first member, second member, rotational shaft member, rotational biasing member and stop ring. The first member has a pair of sidewalls that face each other. The second member has a pair of plate members each disposed proximate to the outer-facing sides of the sidewalls. The rotational shaft member is fitted into shaft holes in each of the plate members and the sidewalls. The rotational biasing member is disposed around the rotational shaft member and its one end is engaged with the first member and the other end with the stop ring fixed to the rotational shaft member. The first member is rotatable with respect to the rotational shaft member that is fixed to the second member. The rotational biasing member and stop ring are disposed between the sidewalls.

主权项

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.