Patent ID: 7571964

Claim:
An electric telescopic apparatus for a vehicle seat, comprising: a base body provided at one of a seat portion of the vehicle seat and a base portion of an ottoman; a movable body provided at a movable portion, the movable body assembled to the base body so as to extend or retract forward and backward relative to the base body; a rack fixed horizontally in a tight contact manner on one of a top wall and a bottom wall of one of the base body and the movable body, the rack being formed in a plate shape which extends in the extending and retracting direction of the movable body, and having teeth at a longitudinal side portion thereof; a pinion housed in the other of the base body and the movable body and configured to be engaged with the rack; a drive unit having a drive source for driving the pinion; a guide mechanism provided at the base body and the movable body to guide the movable body in the extending and retracting direction of the movable body; and an anti-wobble mechanism including a first guide portion and a first engagement portion, the first guide portion being formed as an inner peripheral surface of an aperture formed in one of the top wall and the bottom wall of one of the base body and the movable body, the first guide portion being a straight-line surface opposing the rack and parallel to the rack, the first engagement portion being formed on at least one of the top wall and the bottom wall of the other of the base body and the movable body, and the first engagement portion slidably engaging the first guide portion; wherein guide mechanism includes a shaft provided at side surfaces on the right and left of one of the base body and the movable body and extended in the extending and retracting direction of the movable body; and a guide provided at side surfaces on the right and left of the other of the base body and the movable body and outfitted onto the shaft to be slidable.