Patent ID: 6892386

Claim:
A guide shaft height adjustment mechanism, which comprises: a chassis comprised of a chassis base having a flat-plate shape and a hole; a guide shaft for guiding an optical pick-up along a radial direction of an optical disc, the guide shaft having one end acting as a movable end and being mounted on the chassis base so that the movable end can be displaced in a direction perpendicular to the chassis base; an adjustment member rotatably provided at the vicinity of the movable end of the guide shaft, the adjustment member being formed by outsert molding at the position of the hole formed in the chassis base; and a biasing member provided between the chassis base and the guide shaft at the vicinity of the adjustment member for pushing the guide shaft to a direction far away from the chassis base; wherein the adjustment member has an abutment surface at the vicinity of the movable end of the guide shaft, the abutment surface faces the chassis base so that the guide shaft is abutted thereto, and the abutment surface is formed so as to be inclined relative to the chassis base and extend along the circumferential direction of the adjustment member, in which the movable end of the guide shaft is in abutment with the abutment surface by the biasing force of the biasing member, and the distance between the movable end of the guide shaft and the chassis base can be adjusted by rotating the adjustment member.