Camera with annular light shielding member around axially moving lens housing
US5678137A · kind A · utility
4Cited by
1References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1995 |
| Grant date | Oct 14, 1997 |
| Priority date | — |
| Expiry date | Jun 7, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2217/002
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A camera has a light shielding member surrounding an axially movable lens housing arranged to project through a circular opening in a camera housing. The light shielding member has an annular disc portion with an inner peripheral grooved surface frictionally engaging an outer cylindrical surface of the lens housing. The disc portion is positioned between a transverse inner surface of the camera housing cover and a surface of a helicoid member. At its outer periphery, the light shielding member has a generally cylindrical flange that projects axially between a longitudinal inner surface of the camera housing and the helicoid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.