Disk drive head suspension assembly with microactuator

• US 6,535,360 B1
• Filed: 05/30/2000
• Issued: 03/18/2003
• Est. Priority Date: 06/02/1999
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Yong-hoon, Kim, Seok-jung
• Primary Examiner(s): Davis, David
• Application Number:
  US09/580,459
• Time in Patent Office: 1,022 Days
• Field of Search: 360/294.3, 360/294.1, 360/294.2, 360/294.4, 360/294.5, 360/294.6
• US Class Current: 360/294.3
• CPC Class Codes: G11B 5/5552 using fine positioning means for track acquisition separate from the coarse (e.g. track changing) positioning means

Abstract

A head suspension assembly of a hard disk drive includes a rod beam coupled to an end portion of an actuator arm capable of pivoting in a direction following tracks of a disk, a slider supported at an end portion of the rod beam for reading and writing data from and on the disk, a micro actuator including first and second magnetic members installed at the rod beam and the slider, respectively, and being moved by an electromagnetic force between the magnetic members to allow the slider to minutely move with respect to the rod beam, and a connection device for elastically connecting the first magnetic member and the second magnetic member.

Claims

1. A head suspension assembly of a hard disk drive comprising:

a rod beam coupled to an end portion of an actuator arm capable of pivoting in a direction following tracks of a disk;

a slider supported at an end portion of the rod beam for reading and writing data from and on the disk;

a micro actuator including first and second magnetic members installed at the rod beam and the slider, respectively, and being moved by an electromagnetic force between the magnetic members to allow the slider to minutely move with respect to the rod beam; and

a connection device for elastically connecting the first magnetic member and the second magnetic member,

wherein the first magnetic member comprises a first coil base supported at the end portion of the rod beam and a pair of first coils installed at a bottom surface of the first coil base and forming a magnetic field during driving, and the second magnetic member comprises a second coil base installed on an upper surface of the slider to correspond to the first coil base and a second coil installed on an upper surface of the second coil base to correspond to the first coil.

2. The head suspension assembly as claimed in claim 1, wherein the first coils are installed in a circular shape at the left and right sides with respect to a predetermined center line on the slider crossing the track direction and, when current is applied, an induced magnetic field is formed in a vertical direction at a surface of the slider.

3. The head suspension assembly as claimed in claim 1, wherein the second coil is wound in a rectangular shape at an upper surface of the second coil base to generate an electromagnetic force at left and right effective coil portions with respect to a predetermined center line on the slider crossing the track direction.

4. The head suspension assembly as claimed in claim 1, wherein a recessed portion for accommodating the first coil to be separated a predetermined distance from the second coil is formed at the lower surface of the first coil base.

5. A head suspension assembly of a hard disk drive comprising:

a rod beam coupled to an end portion of an actuator arm capable of pivoting in a direction following tracks of a disk;

a slider supported at an end portion of the rod beam for reading and writing data from and on the disk;

a micro actuator including first and second magnetic members installed at the rod beam and the slider, respectively, and being moved by an electromagnetic force between the magnetic members to allow the slider to minutely move with respect to the rod beam; and

a connection device for elastically connecting the first magnetic member and the second magnetic member, wherein the connection device comprises;

a connection plate having an aperture formed at a bottom surface of the first magnetic member for accommodating the second magnetic member to move therein; and

an elastic member for elastically connecting an inner surface of the aperture and an outer surface of the second magnetic member.

6. The head suspension assembly as claimed in claim 5, wherein the elastic member comprises hairpin springs symmetrically provided with respect to a predetermined center line on the slider crossing the track direction.

7. The head suspension assembly as claimed in claim 5, wherein the elastic member comprises a torsion bar connected between the inner surface of the aperture and either a front end portion or a rear end portion of the second magnetic member to allow the second magnetic member to pivot with respect to the first magnetic member while being bent by an electromagnetic force between the magnetic members.

8. The head suspension assembly as claimed in claim 5, wherein the connection plate and the elastic member are integrally formed with the second magnetic member.

9. A head suspension assembly of a hard disk drive comprising:

a rod beam coupled to an end portion of an actuator arm capable of pivoting in a direction following tracks of a disk;

a slider supported at an end portion of the rod beam for reading and writing data from and on the disk;

a micro actuator including first and second magnetic members installed at the rod beam and the slider, respectively, and being moved by an electromagnetic force between the magnetic members to allow the slider to minutely move with respect to the rod beam; and

a connection device for elastically connecting the first magnetic member and the second magnetic member,

wherein the first magnetic member comprises;

a magnet base supported at the end portion of the rod beam; and

a pair of magnets installed on the magnet base such that directions of magnetization are opposite to each other.

10. The head suspension assembly as claimed in claim 9, wherein said magnetic base has a recessed portion formed at a bottom surface thereof.