Patent ID: 7380256

Claim:
A disk drive comprising a turntable which has a ring-like disk receiving surface on which a disk having a center hole is to be placed and which can rotate around a rotation shaft, a disk holding mechanism which holds said disk on said turntable, a disk-retaining abutment member which includes a hole that does not abut against said disk holding mechanism and which has projections provided at an outer periphery of said hole and projecting toward said turntable, and a moving mechanism which allows said disk-retaining abutment member and said turntable to relatively approach each other and separate from each other, wherein said projections are formed by a first deformed portion formed at a position opposed to said disk receiving surface and a second deformed portion formed at a location closer to an inner peripheral side than the disk receiving surface, the projection formed by said second deformed portion most projects toward the turntable.