Objective lens driving device
US5105405A · kind A · utility
15Cited by
10References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 24, 1989 |
| Grant date | Apr 14, 1992 |
| Priority date | — |
| Expiry date | Apr 24, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/093
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An objective lens driving device of a sliding shaft type is mounted on an optical information recording and reproducing apparatus. The objective lens driving device includes an armature unit having a magnet magnetized in a plurality of pairs of magnetic poles, and a stator unit having a yoke, and control coils mounted on the yoke. The magnet is disposed with the boundaries between the magnetic poles which are respectively opposite gaps formed in the yoke. The objective lens driving device has an improved reliability and a reduced number of component parts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.