Patent ID: 8004108

Claim:
An electric power-feeding structure for feeding electric power to a moving body which is driven to be raised or lowered, comprising: an arm having a distal end connected to the moving body movably in a direction perpendicular to a raising or lowering direction of the moving body, and a proximal end adapted to be rotatably driven so as to swing about a rotating axis, to thereby drive the raising or lowering of the moving body, wherein an electrical wire is routed alongside the arm, and one end of the electrical wire extending from the distal end of the arm is connected to the moving body to feed electric power to the moving body, and wherein, in a vicinity of the rotating axis of the arm, the electrical wire is routed around the rotating axis from a folded-back portion at which the electrical wire is folded back, to a fixing portion of the arm so that the electrical wire is bent and deformed to expand a radius of curvature of the electric wire in association with a rotation of the arm to absorb an excess length of the electric wire.