Pickup actuator for disk-type media
US4942562A · kind A · utility
21Cited by
4References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 21, 1988 |
| Grant date | Jul 17, 1990 |
| Priority date | — |
| Expiry date | Mar 21, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/08582
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A pickup actuator includes a slider, an optical pickup unit, and at least one suspension arm extending from the slider for suspending the pickup unit. The pickup unit includes at least one bobbin surrounding a yoke plate, upon which a first coil is wound, and further transversely mounted coils attached to the first coil. The coils collectively control movement of the pickup unit in tracking, focusing and tilt directions thereof. A further bobbin connected to the slider surrounds the yoke plate and includes a further coil wound thereabout for driving the slider and the pickup unit radially of an associated optical disk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.