Actuator for an optical head
US5513047A · kind A · utility
13Cited by
3References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 18, 1994 |
| Grant date | Apr 30, 1996 |
| Priority date | — |
| Expiry date | May 18, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0935
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A focus drive coil is wound on an outer periphery of a lens holder, and two tracking drive coils are provided on the focus drive coil. Magnetic chips are preferably interposed between each of the two tracking drive coils. First to third magnets are provided on an actuator base. The first magnet faces the adjacent half portions of the two tracking drive coils, and the second and third magnets face the outer half portion of the two tracking drive coils. The lens holder is supported on the actuator base by using upper and lower parallel triangular plate springs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.