Lens driving device
US8320065B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Jan 28, 2011 |
| Grant date | Nov 27, 2012 |
| Priority date | — |
| Expiry date | May 18, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/08
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An lens driving device is disclosed. The lens driving device includes a base, a lens holder mounted on the base, a movable cover opposite to the a lens holder, a elastic supporting portion received into the lens holder and engaged with the movable cover, a coil and a permanent magnet respectively attached on the lens holder. The permanent magnet interacts with the coil for generating a magnetic force for driving the lens holder to move toward the base along a central axis of the lens holder. The elastic supporting portion defines an elastic force which is more than a weight of the movable cover but not more than the resultant of the weight of the movable cover and the magnetic force. While assembled, the lens driving device further defines a movable distance between an upper surface of the supporting elements and a first surface of the movable cover.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.