Patent ID: 6952323
Filing Date: 2005-10-04
Classification: G11B

Abstract:
1. A disk drive unit, comprising: a disk storage medium for storing data; a spindle motor for rotating the disk storage medium; a magnetic head for storing and reproducing data from the disk storage medium; a rotary actuator for seeking the magnetic head with respect to the disk storage medium and rotating on a pivot axis; a voice coil motor for rotatably moving the rotary actuator; a disk enclosure for accommodating the disk storage medium, the spindle motor, the rotary actuator and the voice coil motor and which is comprised of a base with an opening and a top cover that seals the opening; a damper disposed between the voice coil motor and the top cover, wherein the voice coil motor comprises a first yoke and a second yoke which are placed opposite each other at a predetermined gap; a permanent magnet disposed between the first and second yokes, wherein the first and second yokes respectively comprise an inner perimeter edge facing the pivot axis, an outer perimeter edge facing the base, and a pair of side perimeter edges combining the outer and inner perimeter edges, and wherein the damper comprises first dampers with a predetermined width along the pair of side perimeter edges; and a second damper with a predetermined width along the outer perimeter of the first yoke, the second damper stretching from the first dampers.