Patent ID: 7574942

Claim:
A cable guide for guiding a cable member for conducting a signal and/or power in an articulated joint that connects a first link member and a second link member to each other in a relatively rotatable manner, comprising: a hollow center drum including a substantially circular outer peripheral wall and fixedly attached to the first link member, the outer peripheral wall being provided with a hole formed at a first angular position substantially aligning with the first link and a slot formed at a second angular position and elongated circumferentially over an angle substantially corresponding to a range of angular movement of the second link member relative to the first link member in such a manner that the cable member is passed into the center drum from the hole and out of the center drum from the slot; a cable support member integrally attached to the center drum and extending inside the center drum to a point adjacent to a center of a rotational movement between the first link member and second link member, wherein the center drum is provided with an end wall, and the cable support member is integrally formed as a rib extending from the end wall; and a shutter plate slidably and circumferentially guided by the center drum and having an end circumferentially interposed between an engagement piece fixedly attached to the second link and the cable member such that the shutter plate is actuated in either circumferential direction depending on a direction of an angular movement of the second link relative to the first link.