Camera lens driving device
US4974006A · kind A · utility
5Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 26, 1989 |
| Grant date | Nov 27, 1990 |
| Priority date | — |
| Expiry date | Dec 26, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B3/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens driving device for an auto-focusing camera includes a lens driving member biased to move in one direction, a ratchet wheel having a plurality of teeth and rotatably associated with the lens driving member, a rockable retaining member having two pawl portions alternately engaging the teeth of the ratchet wheel, an electromagnet for controlling the rocking motions of the retaining member, and a control circuit for outputting a signal to the electromagnet to control the biased movement of the lens driving member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.