Suspension assembly with lift tab for disk drive, disk drive with the same

Patent metadata

Field	Value
Publication number	US-9990945-B2
Application number	US-201715459604-A
Country	US
Kind code	B2
Filing date	Mar 15, 2017
Priority date	Apr 25, 2016
Publication date	Jun 5, 2018
Grant date	Jun 5, 2018

Abstract

According to one embodiment, a suspension assembly includes a support plate and a lift tab extending in a first direction. The lift tab has an arc-shaped cross section, and includes an arc-shaped outer circumferential surface, an arc-shaped inner circumferential surface, a first upper end surface located between one arc ends of the outer and inner circumferential surfaces, and a second upper end surface located between other arc ends of the outer and inner circumferential surfaces of the inner circumferential surface, and a first angle made between the outer circumferential surface and the first upper end surface is less than a second angle made between the inner circumferential surface and the first upper end surface.

First claim

What is claimed is:

1. A suspension assembly for a disk drive, comprising:
a support plate including a distal end; and
a lift tab extending in a first direction from the distal end of the support plate,
wherein
the lift tab is formed to have an arc-shaped lateral cross section orthogonally crossing the first direction, and comprises an arc-shaped outer circumferential surface, an arc-shaped inner circumferential surface, a first upper end surface located between one arc end of the outer circumferential surface and one arc end of the inner circumferential surface, and a second upper end surface located between an other arc end of the outer circumferential surface and an other arc end of the inner circumferential surface, and
a first angle made between the outer circumferential surface and the first upper end surface is less than a second angle made between the inner circumferential surface and the first upper end surface.

2. The suspension of claim 1 , wherein
a third angle made between the first upper end surface and the second upper end surface is 140 to 180 degrees.

3. The suspension assembly of claim 1 , wherein
the outer circumferential surface of the lift tab has a constant radius of curvature.

4. The suspension assembly of claim 1 , wherein
when a gap between the one arc end and the other arc end of the outer circumferential surface is defined as a width of the lift tab, and a gap between a plane where the first upper end surface and the second upper end surface are located and a top portion of the outer circumferential surface is defined as a height of the lift tab, a ratio between the width and the height (width/height) is 4.1 or more.

5. The suspension assembly of claim 1 , wherein
a forth angle made between the outer circumferential surface and the second upper end surface is less than a fifth angle made between the inner circumferential surface and the second upper end surface.

6. The suspension of claim 5 , wherein
a third angle made between the first upper end surface and the second upper end surface is 140 to 180 degrees.

7. A disk device comprising:
a disk shaped recording medium comprising a recording layer;
a suspension assembly comprising a support plate including a distal end, and a lift tab extending in a first direction from the distal end of the support plate;
a magnetic head supported by the support plate of the suspension assembly; and
a ramp member provided on an outer side of the recording medium, to which the lift tab of the suspension assembly is abuttable;
wherein
the lift tab is formed to have an arc-shaped lateral cross section orthogonally crossing the first direction, and comprises an arc-shaped outer circumferential surface, an arc-shaped inner circumferential surface, a first upper end surface located between one arc end of the outer circumferential surface and one arc end of the inner circumferential surface, and a second upper end surface located between an other arc end of the outer circumferential surface and an other arc end of the inner circumferential surface, and
a first angle made between the outer circumferential surface and the first upper end surface is less than a second angle made between the inner circumferential surface and the first upper end surface.

8. The disk device of claim 7 , wherein
a third angle between the first upper end surface and the second upper end surface is 140 to 180 degrees.

9. The disk device of claim 7 , wherein
the outer circumferential surface of the lift tab has a constant radius of curvature.

10. The disk device of claim 7 , wherein
when a gap between the one arc end and the other arc end of the outer circumferential surface is defined as a width of the lift tab, and a gap between a plane where the first upper end surface and the second upper end surface are located and a top portion of the outer circumferential surface is defined as a height of the lift tab, a ratio between the width and the height (width/height) is 4.1 or more.

Assignees

• Toshiba Kk

Inventors

• Aoki Kenichiro
• Sasaki Yasutaka

Classifications

• G11B5/4833 Primary

  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) · CPC title

• G11B21/22 Primary

  while the head is out of operative position · CPC title

• G11B5/4826 Primary

  Mounting, aligning or attachment of the transducer head relative to the arm assembly, e.g. slider holding members, gimbals, adhesive (G11B5/484 takes precedence; details of head housings or structures G11B5/10, G11B5/127; adjustment relative to the record carrier G11B5/56) · CPC title

• G11B5/102

  Manufacture of housing · CPC title