Patent ID: 7913268

Claim:
A motor comprising: a shaft coaxial with a center axis, the shaft having an outer surface having an inner recess, the inner recess being concave toward the center axis; a rotor magnet rotatable integrally with the shaft; a rotor holder having a fitting bore to which the shaft is fitted and including a hollow, approximately cylindrical portion to which the rotor magnet is attached; and a chucking device operable to enable attachment and detachment of a disk-shaped storage medium having a center hole, including a turntable disposed axially above the rotor holder, the turntable having a securing bore to which the shaft is fitted and a placement portion on which the disk-shaped storage medium is placed, wherein the fitting bore is separated from the securing bore by an outer recess facing the inner recess in a radial direction substantially perpendicular to the center axis, the outer recess being concave away from the center axis, and wherein an adhesive is placed in the inner recess and the outer recess.