Patent ID: 7992160

Claim:
A motor comprising: a chucking device for detachably holding a disk having a central opening portion; a rotating body rotatable about a specified center axis, the rotating body including a rotor magnet and a rotor holder, the rotor holder having a cylindrical portion for holding the rotor magnet in place, a cover portion extending from the cylindrical portion to the center axis and a disk support portion formed on an upper surface of the cover portion for making contact with a lower surface of the disk; and a fixed body including a bearing member for rotatably supporting the rotating body and a stator arranged to face the rotor magnet, wherein the chucking device includes: a center case to which the central opening portion of the disk is inserted, the center case having a cylindrical portion coaxial with the center axis and a cover portion for covering an axial upper side of the cylindrical portion of the center case, at least a part of the cylindrical portion of the center case arranged axially above the rotating body; resilient members received within the center case; and claw members for holding the disk in place, the claw members remaining in contact with radial outer ends of the respective resilient member, wherein each of the claw members has a claw portion having a disk holding surface for holding the disk in place and a pair of wing portions extending radially inwardly from the claw portion, and wherein each of the wing portions has a spherical contact surface contacting with an underlying part arranged axially below the wing portions.