Patent ID: 8320085
Filing Date: 2012-11-27
Classification: G11B

Abstract:
1. A disk drive comprising: a head for accessing a data recording area of a disk; an actuator for supporting said head and for pivoting to move said head; a voice coil motor, said voice-coil motor comprising: a latch configured to lock said actuator from pivoting on a pivot shaft toward a data recording area in response to an external force, wherein said latch is positioned at a closed position while being supported by a portion of said actuator when said actuator is positioned at a stand-by position, and is configured to pivot by application of a magnetic bias force which is induced by magnetic flux leakage from said voice coil motor such that said magnetic bias force is configured to act on a magnetic body of said latch with pivoting of said actuator from said stand-by position into proximity with said data recording area such that said latch is configured to stop at an open position; said yoke comprising a protrusion that protrudes toward a magnetic body of said latch when said latch is in an open position, wherein said protrusion is located at a lower position than said magnetic body; and said protrusion comprising a tip that increases in height in a direction in which said magnetic body is configured to move toward when said latch is in said open position.