Patent ID: 7327066

Claim:
A motor comprising: a rotor magnet, which has a cylindrical circumferential surface representing a circular cross section and has a plurality of magnetic poles circumferentially arranged about its center axis; a first core section having first radially inward extending teeth portions each terminating in a flat tooth-end portion paralleling a plane tangent to the circumferential surface of the rotor magnet; a second core section having second radially inward extending teeth portions each terminating in a curved tooth-end portion facing the circumferential surface of the rotor magnet along a predetermined radius of curvature, with at least the second tooth-end portions being axially laminated to the first tooth-end portions, thereby together constituting magnetic pole teeth; a coil, which is fixed to the magnetic pole tooth; a rotor, which holds the rotor magnet therein; and a bearing mechanism, which rotatably supports the rotor relative to the core.