Lens barrel device
US6844988B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 2003 |
| Grant date | Jan 18, 2005 |
| Priority date | — |
| Expiry date | Aug 7, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/026
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens barrel device includes a lens mounted in a lens frame that is threaded into an annular adjusting ring. The adjusting ring is coupled using a bayonet to a lens barrel. The lens barrel includes first and second flanges on the inner periphery of the lens barrel that define grooves for receiving bayonet projections on the annular adjusting ring. The bayonet coupling structure of the annular adjusting ring includes semispherical projections for elastically engaging inner walls of the grooves and also includes a rotation regulating stopper for engaging an end wall of an opening in one of the inner flanges so as to regulate rotation of the annular adjusting ring, and hence the lens, relative to the lens barrel. The end wall includes a groove for receiving a jig that can release the bayonet coupling structure of the annular adjusting ring from the lens barrel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.