Patent ID: 7168079

Claim:
A disk apparatus comprising: an apparatus body; a chassis fixed to the apparatus body; a tray that moves with respect to the chassis to carry a disk; a drive unit that moves in a direction substantially orthogonal to a carrying direction of the tray with respect to the chassis to mount or dismount the disk placed on the tray; a pickup unit attached to the drive unit and having an optical pickup for recording or reproducing the disk, the pickup unit being movable in a radial direction of the disk; a plurality of gears arranged on the drive unit; a motor having a motor shaft and arranged on the drive unit to have an axial direction inclined with respect to a moving direction of the pickup unit, the motor driving the drive unit, the pickup unit and the tray through the plurality of gears; a worm gear having a lead angle of 15°–30° and attached to the motor shaft; a stacked gear including a worm wheel and a flat gear; and a gear arranged on the chassis and being in mesh with the gear arranged on the drive unit; wherein a feed of the tray coupled with the worm gear through the stacked gear is set at 1.5 mm–2.5 mm for each rotation of the worm gear; and a tooth width of the gear arranged on the chassis is set at 15 mm–30 mm.