Patent ID: 8902542

Claim:
A disk drive device, comprising: a hub on which a recording disk is to be mounted; a laminated core formed by laminating magnetic steel sheets, the laminated core having a ring portion and a plurality of teeth that extend radially from the ring portion; coils wound around the plurality of teeth; a magnet fixed to the hub, the magnet being magnetized for driving with a plurality of poles along the circumferential direction and arranged to radially face the plurality of teeth; a base that supports a bearing unit, which rotatably supports the hub; and a projecting portion along the bearing unit, which axially extends toward the inner surface of the hub and by which the core is supported; wherein the laminated core is fixed by sandwiching the ring portion between a seat formed on the base and an extending portion extending radially outward from the projecting portion, and wherein one end surface of the ring portion of the laminated core toward the base is in contact with the seat formed on the base, and the other end surface of the ring portion of the laminated core away from the base is in contact with the extending portion.