Disk drive actuator latch

摘要

A magnetic bistable latch mechanism for latching the actuator of a disk drive in a parked position is described. The latch comprises a magnetically detented latch lever which engages and latches a latch arm in a parked position. The latch arm is part of actuator motor structure and accordingly latches the actuator motor. The latch lever is held in either the latched or unlatched position by magnetic attraction and resists shocks and impacts that otherwise would move the actuator. The latch lever is shifted from one position t the other by the actuator motor eliminating the need for additional circuitry or mechanisms to control the latch. Additionally, the latch does not consume any electrical power in either the latched or unlatched condition.