Patent ID: 7564654

Claim:
An actuator latch device for locking an actuator of a hard disk drive, the actuator having a swing arm rotatably installed on a base member, a voice coil motor (VCM) coil provided at an end of the swing arm, and magnets oppositely arranged at the VCM coil, the actuator latch device comprising: a notch provided at the end of the swing arm; a latch lever rotatably installed on the base member and having at a first end thereof a hook interfering with the notch to restrict one way rotation of the swing arm, and a counterbalance device at a second end thereof; a stopper on the base member to block the counterbalance device so as to restrict a rotation of the latch lever; and a first iron core at an end of the swing arm to allow the swing arm to receive a torque by a leakage flux of the magnet, and a second iron core at the counterbalance device of the latch lever to allow the latch lever to receive a torque by a leakage flux of the magnet.