Patent ID: 7265945
Filing Date: 2007-09-04
Classification: G11B

Abstract:
1. A head drive device for use in driving a head relative to a disk rotatable about a disk axis, comprising: a head support mechanism including a head support member having a support arm and a slider attached to one end portion of said support arm for at least one of recording on a disk and reproducing from a disk; a bearing part for rotatably supporting said head support mechanism for rotation in a direction parallel to a surface of the disk and about a bearing part axis parallel to but spaced apart from the disk axis; and a driving device arranged to rotate said head support mechanism in a direction parallel to the surface of the disk; wherein one end portion of a spring plate is connected to another end portion of said support arm, and another end portion of said spring plate is connected to a base arm for thrusting said slider in a direction of the disk; wherein said spring plate is arranged to bias said head support member toward said base arm such that one end portion of said base arm is contacted against said head support member; wherein another end portion of said base arm is supported on said bearing part for rotation about said bearing part axis; wherein a rotation support part is provided between said base arm and said support arm and defines a rotation axis of said head support member, said rotation axis being perpendicular to a plane defined by a longitudinal axis of said support arm and said bearing part axis, and said rotation axis is provided away from said slider; wherein the head is mounted on said slider and attached to said one end portion of said support arm by way of said slider; and wherein a balance member is formed at said another end portion of said support arm, and said head support member further includes said slider and the balance member.