Disk system with sub-actuators for fine head displacement
US5189578A · kind A · utility
152Cited by
12References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1990 |
| Grant date | Feb 23, 1993 |
| Priority date | — |
| Expiry date | Jun 26, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/4873
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic disk system utilizes both of voice coil motor and a piezoelectric element provided on a head supporting arm to precisely position a head to a predetermined position on a disk. The piezoelectric element is built in the distal end portion of the head supporting arm and is restricted in respect of its movement by a resilient mechanism which has low rigidity in the driving direction of the piezoelectric element and high rigidity in the other directions. The resilient mechanism is formed by pairs of doubled parallel leaf springs so arranged that each pair is disposed on either side of the piezoelectric element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.