Spindle motor and information recording and/or reproducing apparatus having this spindle motor

摘要

A spindle motor that can be reduced in size and thickness and yet develops a high rotational torque, and an information recording and/or reproducing apparatus employing this spindle motor. A rotor R includes a turntable 50 which carries and secures a disc-shaped recording medium D and which is rotatable relative to a fixed shaft 66 via a bearing, a ring-shaped first magnet 60 secured to the turntable 50 and arranged inwardly of a coil 68 having the fixed shaft 66 as center, and a ring-shaped second magnet 62 secured to the turntable 50 and arranged outwardly of the coil 68 having the fixed shaft 66 as center. The rotor R is rotated relative to the stator S, by a magnetic field generated in the coil 68 on supplying the current to the coil 68 and another magnetic field generated between the first and second magnets 60 and 62.