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Recording disk drive capable of suppressing vibration of flexible printed circuit board

a flexible printed circuit board and recording disk technology, applied in the direction of laminating printed circuit boards, dielectric characteristics, instruments, etc., can solve the problems of insufficient positioning accuracy of the first particularly limited displacement of the second flexible printed circuit board, etc., to achieve the effect of suppressing vibration of the flexible printed circuit board and higher accuracy

Inactive Publication Date: 2007-07-05
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a recording disk drive with a flexible printed circuit board that can suppress vibration caused by the rotation of the recording disk. The flexible printed circuit board is positioned on the head actuator and a viscoelastic layer is overlaid on its surface to absorb the vibration. The invention also provides a flexible printed circuit board unit and a recording disk drive with a high accuracy of positioning the flexible printed circuit board. The technical effects of the invention include improved accuracy of reading and writing information, and reduced exposure of the electrically-conductive pattern.

Problems solved by technology

If the second flexible printed circuit board is integral to the head suspension, the displacement of the second flexible printed circuit board is particularly limited when the second flexible printed circuit board is to be positioned relative to the first flexible printed circuit board.
However, a sufficient accuracy of the positioning of the first flexible printed circuit board cannot be achieved with the conventional positioning hole.

Method used

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  • Recording disk drive capable of suppressing vibration of flexible printed circuit board
  • Recording disk drive capable of suppressing vibration of flexible printed circuit board
  • Recording disk drive capable of suppressing vibration of flexible printed circuit board

Examples

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Embodiment Construction

[0031]FIG. 1 schematically illustrates the inner structure of a hard disk drive (HDD) 11 as an example of a recording disk drive or storage device according to an embodiment of the present invention. The HDD 11 includes a box-shaped main enclosure 12 defining an inner space. At least one magnetic recording disk 13 is mounted on the driving shaft of a spindle motor 14 within the main enclosure 12. The spindle motor 14 is allowed to drive the magnetic recording disk 13 for rotation at a higher revolution speed such as 10,000 rpm, 15,000 rpm, or the like, for example. A cover, not shown, is coupled to the main enclosure 12 so as to define the closed inner space between the main enclosure 12 and the cover itself.

[0032] A head actuator 15 is also accommodated in the inner space of the main enclosure 12. The head actuator 15 comprises an actuator block 16. The actuator block 16 is coupled to a vertical support shaft 17 for relative rotation. The rotation of the actuator block 16 allows t...

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Abstract

A fixing member is spaced from a head actuator by a predetermined distance. A flexible printed circuit board extends at least from the head actuator to the fixing member. The flexible printed circuit board is superposed on the surface of the fixing member. A viscoelastic layer and a protecting layer are overlaid on the surface of the flexible printed circuit board. A clip clips all the fixing member, the flexible printed circuit board, the viscoelastic layer and the protecting layer together. When a head slider is positioned, the head actuator changes its attitude relative to a recording disk. The inertial force based on the rotation causes the first flexible printed circuit board to vibrate when the actuator block stops rotating. The viscoelastic layer serves to absorb this residual vibration of the first flexible printed circuit board. Vibration of the flexible printed circuit board can be suppressed.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a recording disk drive such as a hard disk drive (HDD). In particular, the invention relates to a recording disk drive comprising: a head actuator; a fixing member spaced from the head actuator by a predetermined distance; and a flexible printed circuit board attached to the head actuator so as to extend at least from the head actuator to the fixing member. [0003] 2. Description of the Prior Art [0004] A head actuator is incorporated in a hard disk drive (HDD) so as to change its attitude relative to a magnetic recording disk. The head actuator comprises an actuator block coupled to a vertical support shaft. Actuator arms are defined in the actuator block. A head suspension is fixed to the corresponding actuator arm so as to support a head slider at the tip end thereof. A first flexible printed circuit board is attached to the actuator block so as to supply a sensing current or a wri...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G11B5/55G11B33/12G11B5/012G11B17/00G11B21/02G11B33/08G11B33/14H05K1/00H05K1/02H05K3/00H05K3/36H05K7/14
CPCH05K1/0269G11B33/122H05K3/0058H05K3/281H05K3/363H05K2201/0133H05K2201/058H05K2201/09063H05K2201/0989H05K2201/099H05K2201/09918H05K2201/10386H05K2201/10409H05K2201/10598H05K2201/2045H05K2203/0191H05K2203/166H05K2203/167G11B5/4846G11B33/08G11B33/121H05K1/0393
Inventor IZUMI, MITSUHIROYOSHIDA, MITSUAKIKANEKO, HISASHIINO, TSUNEYORIKOMURA, YUKIHIROFUJIMOTO, SHINJIFUNABASHI, KEI
Owner FUJITSU LTD
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