HEAD STACK ASSEMBLY AND DISK DRIVE WITH THE SAME

• US 20120002328A1
• Filed: 06/03/2011
• Published: 01/05/2012
• Est. Priority Date: 06/30/2010
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Aoki, Kenichiro, Nakada, Toshiyuki
• Granted Patent: US 9,019,662 B2
• Time in Patent Office: Days
• US Class Current: 360/244.5
• CPC Class Codes: G11B 5/4833 Structure of the arm assembly, e.g. load beams, flexures, parts of the arm adapted for controlling vertical force on the head G11B5/484 takes precedence

Abstract

According to an embodiment, a head stack assembly includes an arm including a swaged seat surface with swaged hole, a load beam supporting a head, and a baseplate secured to a proximal end portion of the load beam, including an annular protrusion secured to the swaged hole of the arm by swaging, and secured to the swaged seat surface. The arm includes a distal end portion located on a longitudinal end side of the arm with respect to the center of the swaged hole and being less rigid than the other portion of the arm around the swaged hole.

Claims

1. A head stack assembly comprising:

an arm comprising a swaged seat surface comprising a swaged hole, the arm comprising a first end portion proximate the swaged hole located at a longitudinal end of the arm, the first end portion being less rigid than a second portion of the arm proximate the swaged hole;

a suspension comprising a load beam configured to support a head; and

a baseplate secured to an end portion of the load beam, comprising an annular protrusion secured to the swaged hole of the arm by swaging, and secured to the swaged seat surface.

2. The head stack assembly of claim 1, wherein the arm comprises a notch formed in the arm first end portion.

3. The head stack assembly of claim 2, wherein the notch is formed throughout a thickness of the arm.

4. The head stack assembly of claim 3, wherein the notch is in a part of the first end portion in a thickness direction of the arm.

5. The head stack assembly of claim 1, wherein the notch is symmetrical with respect to a central axis of the arm passing through the center of the swaged hole.

6. The head stack assembly of claim 1, wherein the arm comprises a through-hole formed in the arm first end portion.

7. The head stack assembly of claim 6, wherein the through-hole is symmetrical with respect to a central axis of the arm passing through the center of the swaged hole.

8. A disk drive comprising:

a disk recording medium;

a drive motor configured to support and rotate the recording medium; and

a head stack assembly configured to support a head, the head being configured to perform data processing for the recording medium and to be movable relative to the recording medium, the head stack assembly comprising

an arm comprising a swaged seat surface comprising a swaged hole, the arm comprising a first end portion proximate the swaged hole located on a longitudinal end side of the arm, the first end portion being less rigid than a second portion of the arm proximate the swaged hole;

a suspension comprising a load beam supporting the head; and

a baseplate secured to an end portion of the load beam, comprising an annular protrusion secured to the swaged hole of the arm by swaging, and secured to the swaged seat surface.

9. The disk drive of claim 8, wherein the arm comprises a notch formed in the arm first end portion.

10. The disk drive of claim 9, wherein the notch is formed throughout a thickness of the arm.

11. The disk drive of claim 9, wherein the notch is in a part of the first end portion in a thickness direction of the arm.

12. The disk drive of claim 9, wherein the notch is symmetrical with respect to a central axis of the arm passing through the center of the swaged hole.

13. The disk drive of claim 8, wherein the arm comprises a through-hole formed in the arm first end portion.

14. The disk drive of claim 13, wherein the through-hole is symmetrical with respect to a central axis of the arm passing through the center of the swaged hole.