Patent ID: 7663842

Claim:
An actuator apparatus used with a hard disk drive (HDD), the actuator apparatus comprising: an actuator arm that is pivotable; a magnetic head mounted onto one end of the actuator arm; an overmold connected to the other end of the actuator arm and including a metal piece; a voice coil motor (VCM) having a coil coupled to the overmold and at least one magnet positioned to face the coil; and a stopper positioned to be spaced apart at a predetermined interval from the overmold of the actuator arm when the magnetic head is positioned at a parking position to limit pivoting of the actuator arm, wherein the overmold contacts the stopper when the actuator arm moves to the parking position and the stopper is positioned where a torque acting on the actuator arm due to the metal piece and the magnet is substantially 0.