Patent ID: 6487162
Filing Date: 2002-11-26
Classification: G11B

Abstract:
A disc clamping device for clamping a disc with a center hole comprising:a turntable having a boss on the center for putting the disc thereon; and a disc clamping member tightly sleeved on the boss having a diameter conformed to that of the center hole of the disc, and the disc clamping member including a plurality of cantilever members along its periphery, and a protuberance provided on an outer surface of each cantilever member; wherein the protuberances are respectively located near an open end of the cantilevers, and the cantilevers are structured such that they are deformed inwardly when biased by the disc as the disc is being sleeved through the disc clamping member, causing the protuberances to be elastically energized to exert an urging force against the disc so as to forcefully clamp the disc on the turntable; said disc clamping device further comprising an annular flange on the outer periphery of the top surface of the turntable for providing a frictional force to the disc when rotating; and a line from one of the protuberances to the center of the disc clamping member is at an angle ranging from 10 to 60 degrees with respect to a line from the base of the cantilever member to the center of the disc clamping member.