Collapsible lens barrel
US6943963B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 22, 2004 |
| Grant date | Sep 13, 2005 |
| Priority date | — |
| Expiry date | Apr 22, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B17/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
When a wheel is rotated, first inclined portions of end surface cams provided on the wheel push corresponding cam followers formed on a movable cylinder. Accordingly, the movable cylinder holding a photographing lens is extended. Then, when each of the cam followers reaches a first flat portion of the corresponding end surface cam, the movable cylinder is placed in a photographing position. In the photographing position, when the wheel is further rotated, the cam follower is pushed by a second inclined portion of the end surface cam. The movable cylinder is thus extended. Then, when the cam follower reaches a second flat portion of the corresponding end surface cam, the movable cylinder is placed in a macro photographing position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.