Patent ID: 8645982
Filing Date: 2014-02-04
Classification: G11B

Abstract:
1. A disc clamping unit, the disc clamping unit comprising: a case including a lateral wall unit formed with a hollow hole, and a support unit extended to an inner side of a distal end of the lateral wall unit; a clamper arranged inside the lateral wall unit and supported by the support unit for clamping an upper surface of the optical disc; a cover plate covering the clamper; and an elastic member interposed between the clamper and the cover plate to apply a pressure to the clamper to a direction facing the upper surface of the optical disc, wherein the elastic member includes a coil spring, and wherein an area contacting the cover plate in the elastic member includes a plurality of first uneven units, and an area contacting the clamper in the elastic unit includes a plurality of second uneven units.