Patent ID: 7420775
Filing Date: 2008-09-02
Classification: G11B

Abstract:
1. A hard disk drive comprising: a housing including a base member attached to a cover member; a plurality of disks rotatably stacked on the base member and spaced apart from one another; an actuator pivotably installed on the base member and fixedly supporting, on its leading end, a slider on which a magnetic head for recording or reproducing data to or from the disks is mounted; and a damper disposed between two of the plurality of stacked disks, wherein one or more grooves are formed on at least one surface of the damper respectively facing at least one of the two disks, with at least one of the grooves traversing from an inner periphery of the damper to an outer periphery of the damper to guide an air flow of channeled air in the at least one groove, and with a rotational axis of the at least one disk being an origin and a pair of virtual straight lines intersecting each other being drawn to divide a corresponding plane into four sections, a center of curvature of the one or more grooves is positioned in a quadrant symmetric with respect to an origin to a quadrant in which a pivot axis of the actuator is positioned and a radius of curvature of the groove is greater than a radius of the disk.