DISK DEVICE

摘要

A magnetic disk device that is capable of thinning the magnetic disk device due to the thinning of the clamp, improving impact resistance due to the increase of the clamping force, and reducing rotation synchronization deviations such as the warping or swell of the disk that is caused by misalignment between a disk pressing section, the disk support surface of a spindle hub, and the disk. That is, the clamp structure is arranged so that the shape of a clamp (3) in the inner periphery rather than in the diameter where the outer diameter of a screw head (4b) contacts the clamp (3) has a displacement portion (3b) in the direction of the screw axis force over the entire periphery with the contact portion used as a reference.