Lens driving device for auto-focus camera
US5680649A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 1995 |
| Grant date | Oct 21, 1997 |
| Priority date | — |
| Expiry date | Jun 29, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/08
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens driving device comprises a lens driving member mounted for rotation between an initial position and a preselected focus position, an urging member for urging the lens driving member in a first direction of rotation to control a rotational position of the lens driving member in accordance with the preselected focus position, and a ratchet operably rotatable with the lens driving member. A retaining member is mounted for back and forth rocking movement and has retaining portions for alternate engagement with the ratchet during back and forth rocking movement of the retaining member. A control mechanism controls the rocking movement of the retaining member. A holding member holds the lens driving member from rotation in a second direction of rotation opposite to the first direction of rotation when the lens driving member is in the initial position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.