Patent ID: 7681209

Claim:
An optical disk player, comprising: an optical pickup unit which outputs a light to record and read data on and from an optical disk; a pinion which is rotated by a driving force of a motor; and a rack which holds the optical pickup unit and is also engaged with the pinion and moved with rotation of the pinion, wherein the rack is a double rack which includes a fixed rack plate, which is movably supported by guide members and is fixed to the optical pickup unit, and a movable rack plate, which overlaps the fixed rack plate slidably in a direction parallel to a moving direction of the fixed rack plate so that a backlash between the rack and the pinion is prevented, wherein the optical disk player further comprises a press member which presses the movable rack plate against the fixed rack plate in a horizontal direction perpendicular to a slide direction of the movable rack plate, wherein a shaky movement between the movable rack plate and the fixed rack plate in the horizontal direction is avoided by pressing the movable rack plate against the fixed rack plate by using the press member, and thus the movable rack plate does not hit the fixed rack plate when the rack moves with rotation of the pinion.