Lens drive device
US8040620B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2009 |
| Grant date | Oct 18, 2011 |
| Priority date | — |
| Expiry date | Dec 30, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K41/0356
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lens drive device may include a movable body provided with a lens and a drive mechanism for driving the movable body in the optical axis direction. The drive mechanism may include a substantially triangular prism-shaped drive magnet part disposed in at least one of four corners of the lens drive device, and a drive coil wound around a substantially triangular tube shape and whose inner peripheral face is oppositely disposed to an outer peripheral face of the drive magnet part through a gap space. In at least another embodiment, a lens drive device may include a flat spring provided with a plurality of arm parts which connect a movable body fixed part with a fixed body fixed part. The arm part is formed with a low spring constant part whose spring constant is smaller than a spring constant of other portion of the arm part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.