Spindle motor and disk unit

摘要

A spindle motor employed for a hard disk unit, including a hub having an outer peripheral wall portion provided with a rotor magnet on its outer peripheral surface and formed so as to be able to support the inner peripheral portion of a hard disk and a stator coil fixed so as to be positioned outwards in the radial direction of the disk and face the rotor magnet. This spindle motor is assembled in the disk unit, in which each stator coil is disposed so that the tracing of the magnetic head in movement is positioned between adjacent cores, thereby the magnetic head is affected less by the leak magnetic flux from the stator coil. In addition, the scanning head is moved to its unloading position with use of an energy accumulated in the capacitor when the power of the disk unit is turned off.