Patent ID: 8413179

Claim:
A disk holding device for a disk having a center hole, comprising: a disk holding mechanism for engagement with an edge of said center hole when in a holding position, and for coming away from said edge internally when in a release position, said disk holding mechanism comprising first, second and third coupling levers for engagement on at least three points of said edge, each of said first, second and third coupling levers comprising a shank portion for insertion in said center hole, each of said first and second coupling levers further has a hook portion, disposed to project from said shank portion, for coupling with said edge, said first, second and third coupling levers being movable between said holding position and said release position; an actuating mechanism for shifting said disk holding mechanism, to hold said disk by setting said disk holding mechanism in said holding position, and to release said disk by setting said disk holding mechanism in said release position; and a regulating portion, disposed opposite to said third coupling lever with respect to said center hole, for contacting a peripheral portion of an upper surface of said disk, to keep said disk retained on said third coupling lever by preventing skew relative to said disk holding mechanism.