Voice coil motor with improved zooming performance
US11733587B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2022 |
| Grant date | Aug 22, 2023 |
| Priority date | — |
| Expiry date | Apr 9, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2205/0069
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A voice coil motor includes a housing, a first lens holder, a second lens holder, a first electromagnetic drive assembly, and a second electromagnetic drive assembly. The first electromagnetic drive assembly generates a first electromagnetic force to drive the second lens holder to move in a moving direction. The second electromagnetic drive assembly is adapted to drive the first lens holder to move along the moving direction. The first magnetic steel portion includes a first magnet and a second magnet. The first coil includes a first wire portion and a second wire portion. When the first coil is conducted, a direction of current in the first wire portion and a direction of current in the second wire portion have at least components in opposite directions. The present disclosure can solve the jam problem when zooming, and also increase the zoom stroke.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.