Head gimbal assembly and disk device with the same

Patent metadata

Field	Value
Publication number	US-9245552-B2
Application number	US-201514616479-A
Country	US
Kind code	B2
Filing date	Feb 6, 2015
Priority date	Feb 21, 2014
Publication date	Jan 26, 2016
Grant date	Jan 26, 2016

Abstract

According to an embodiment, a head gimbal assembly includes a support plate, a wiring member, a magnetic head and drive members. A gimbal portion of the wiring member includes a thin metallic plate including a tongue portion mounted with a magnetic head, a proximal end portion fixed to the support plate, support projections, and link portions, an insulating layer including first bridge portions extending from the proximal end portion to the tongue portion, and second bridge portions extending from the proximal end portion to middle portions of the first bridges, and a conducive layer including signal wirings extending to the tongue portion through the second and first bridge portions, and reinforcement wiring portions. The drive members are provided at the first bridge portions.

First claim

What is claimed is:

1. A wiring assembly comprising:
a wiring member comprising a metallic plate, an insulating layer on the metallic plate, and a conductive layer on the insulating layer, wherein the metallic plate comprises a proximal end portion, a tongue portion located apart from the proximal end portion; the insulating layer comprises a distal end portion on the tongue portion, a pair of first bridge portions extending from the proximal end portion to the distal end portion along both sides of the tongue portion, and a pair of second bridge portions extending from the proximal end portion to middle portions of the first bridge portions to join the first bridge portions; and the conductive layer comprises a plurality of wirings being through the first bridge portions and the second bridge portions; and
a drive member fixed to each of the first bridge portions in a position between the proximal end portion and the middle portion, connected to at least one of the wirings, and configured to expand and contract between the proximal end portion and the middle portion.

2. The wiring assembly of claim 1 , wherein the metallic plate comprises a pair of projection portions projecting from the tongue portion.

3. The wiring assembly of claim 2 , wherein the metallic plate comprises a pair of link portions extending along the both sides of the tongue portion and connecting the proximal end portion and the tongue portion.

4. The wiring assembly of claim 2 , wherein each of the first bridge portions comprises a part fixed to the projection portion.

5. The wiring assembly of claim 1 , wherein the conductive layer comprises reinforcement wiring portions provided at the middle portions.

6. The wiring assembly of claim 1 , wherein the metallic plate comprises a pair of link portions extending along the both sides of the tongue portion and connecting the proximal end portion and the tongue portion.

7. A head wiring assembly comprising:
a support plate including a convex portion;
a wiring member attached to the support plate and comprising a metallic plate, an insulating layer on the metallic plate, and a conductive layer on the insulating layer, wherein the metallic plate comprises a proximal end portion fixed to the support plate, a tongue portion located apart from the proximal end portion and located over the convex portion; the insulating layer comprises a distal end portion on the tongue portion, a pair of first bridge portions extending from the proximal end portion to the distal end portion along both sides of the tongue portion, and a pair of second bridge portions extending from the proximal end portion to middle portions of the first bridge portions to join the first bridge portions; and the conductive layer comprises a plurality of wirings being through the first bridge portions and the second bridge portions;
a drive member fixed to each of the first bridge portions in a position between the proximal end portion and the middle portion, connected to at least one of the wirings, and configured to expand and contract between the proximal end portion and the middle portion; and
a magnetic head attached to the tongue portion and electrically connected to a part of the wirings.

8. The head wiring assembly of claim 7 , wherein the metallic plate comprises a pair of projection portions projecting from the tongue portion and located close to the convex portion.

9. The head wiring assembly of claim 8 , wherein the metallic plate comprises a pair of link portions extending along the both sides of the tongue portion and connecting the proximal end portion and the tongue portion.

10. The head wiring assembly of claim 8 , wherein each of the first bridge portions comprises a part fixed to the projection portion.

11. The head wiring assembly of claim 7 , wherein the conductive layer comprises reinforcement wiring portions provided at the middle portions.

12. The head wiring assembly of claim 7 , wherein the metallic plate comprises a pair of link portions extending along the both sides of the tongue portion and connecting the proximal end portion and the tongue portion.

13. A disk device comprising:
a disk recording medium; and
the head wiring assembly of claim 7 .

14. The disk device of claim 13 , wherein the metallic plate comprises a pair of projection portions projecting from the tongue portion and located close to the convex portion.

15. The disk device of claim 14 , wherein the metallic plate comprises a pair of link portions extending along the both sides of the tongue portion and connecting the proximal end portion and the tongue portion.

16. The disk device of claim 14 , wherein each of the first bridge portions comprises a part fixed to the projection portion.

17. The disk device of claim 13 , wherein the conductive layer comprises reinforcement wiring portions provided at the middle portions.

18. The disk device of claim 13 , wherein the metallic plate comprises a pair of link portions extending along the both sides of the tongue portion and connecting the proximal end portion and the tongue portion.

Assignees

• Toshiba Kk

Inventors

• Kido Takuma
• Sasaki Yasutaka
• Kudo Masaya

Classifications

• G11B5/5552

  using fine positioning means for track acquisition separate from the coarse (e.g. track changing) positioning means · CPC title

• G11B5/483

  Piezoelectric devices between head and arm, e.g. for fine adjustment · CPC title

• G11B5/486 Primary

  with provision for mounting or arranging electrical conducting means or circuits on or along the arm assembly · CPC title

• G11B5/4853 Primary

  Constructional details of the electrical connection between head and arm · CPC title

• G11B5/48

  Disposition or mounting of heads {or head supports} relative to record carriers {(mounting of head within housing G11B5/105); arrangements of heads, e.g. for scanning the record carrier to increase the relative speed (driving of both record carriers and head G11B15/18; guiding record carriers G11B15/60; head selecting circuits G11B15/12)} · CPC title