Patent ID: 6961215

Claim:
A disk drive device, comprising: a recording medium defining an axis of rotation having an axial direction; a head slider which has a head element for recording data on the recording medium and for reading data recorded on the recording medium; a spindle motor for rotationally driving the recording medium; a clamp for applying a pressing force to the recording medium to fasten the recording medium to the spindle motor, the clamp having an axial center, an attachment portion extending from the axial center that secures the clamp to the spindle motor, a pressing portion that applies force to the recording medium, and an elastic portion located between the attachment portion and the pressing portion, and the clamp being joined to the spindle motor with a single fastener that extends through the axial center of the clamp; a film body interposed between the pressing portion and the recording medium, the film body being formed from a material which is more pliable than a material forming the clamp, and the film body material having a lower coefficient of friction than the clamp material; and the attachment portion is located closer to the pressing portion in the axial direction than the elastic portion, such that the attachment portion, the elastic portion, and the pressing portion form a concave cross-sectional shape on both sides of the axial center of the clamp.