Lead screw device, lens driver, lens barrel, and camera using the lead screw device
US10473882B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2017 |
| Grant date | Nov 12, 2019 |
| Priority date | — |
| Expiry date | Aug 7, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical device includes an optical system including a plurality of lens groups, at least one lens group being a movable lens group moving in an optical axis direction, and a movable frame to move the movable lens group. The movable frame includes a driving source, a drive screw, a lens supporting frame, and maintaining an integrated state relative to the movable lens group, a plurality of arms disposed in a position to face the drive screw and being openable and closable relative to the drive screw with a single opening and closing axis as a support axis, the plurality of arms including a first arm and a second arm, and a biasing spring configured to apply a biasing force to the first arm in a direction in which the first arm approaches the drive screw, wherein the lens supporting frame is further configured to support the biasing spring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.