Disc clamping device with self lock elements
AssigneeIndustrial Technology Research Institute
InventorsMin-Der Wu, Wan-Wen Chiu, Hsu-Pin Pan
Life of this patent
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Abstract
A disc clamping device with self lock elements particularly for DVD-ROM or CD-ROM fixedly maintained on a turntable when disc is rotating in high speed. The device comprises a turntable having a boss on the center for putting disc thereon, and a disc clamping member tightly sleeved on boss having protuberances on periphery wherein protuberances are deformed inwards when biased by disc such that disc can insert through disc clamping member, and then protuberances return to original forms by elastically energized force for clamping disc on turntable. By utilizing this, the purposes of decreasing the umber of parts, easy assembly, and high precision positioning of disc are achieved.
Claims7
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.
Dependencies are inferred from the claim text.