Disk drive employing a spindle motor comprising a hub ratchet arm disengaged through angular velocity

摘要

A disk drive is disclosed employing a spindle motor comprising a hub ratchet arm disengaged through angular velocity. In one embodiment the ratchet arm is connected to the hub and engages a spindle shaft or a stator, and in an alternative embodiment the ratchet arm is connected to the spindle shaft or the stator and engages the hub. In one embodiment the ratchet arm disengages through centrifugal force, and in an alternative embodiment the ratchet arm disengages through an air bearing or windage.