Patent ID: 7877761

Claim:
An optical disc apparatus which records or reproduces information onto/from an optical disc, the apparatus comprising: an optical pickup which irradiates a laser beam onto the optical disc to receive its reflection light; a pickup moving mechanism which allows the optical pickup to be moved in a substantially radius direction of the optical disc; a disc motor which drives the optical disc to rotate; a clamper which is fixed to a rotational portion of the disc motor and which is engaged with a center hole of the optical disc or a marginal portion of the center hole of the optical disc when the optical disc is rotated; a chassis in which the optical pickup, the pickup moving mechanism, and the disc motor are mounted; a motor fixing plate through which the disc motor is attached to the chassis; a tray which is coupled to the chassis to insert or discharge the optical disc into/from an apparatus body; a bottom cover which is coupled to a surface opposite to a disc mounting surface of the tray; and a bottom case which is arranged outside the bottom cover and which has a convex portion protruding in the bottom cover direction at a region including the whole or a part of an orthographically-projected surface of the disc motor on a surface opposed to a rear surface of the disc motor, wherein in a recording or reproducing state, the sum of a first distance between the motor fixing plate and the bottom cover and a second distance between the bottom cover and the convex portion of the bottom case is smaller in the rotational axis direction of the disc motor than the sum of a third distance between the optical disc and the tray and an insertion depth by which the clamper is inserted into the center hole of the optical disc.