Focal-plane shutter for digital camera
US6783287B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2002 |
| Grant date | Aug 31, 2004 |
| Priority date | — |
| Expiry date | Sep 2, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B9/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
When the main power of a camera is turned on, a set member (14) is rotated from an initial position to a set position by an operation member (15) on the camera side and once stops at a midway position. At this time, a second blade group (19) retreats from an aperture (1a) and a first blade group (16) enters the aperture 1a to a position not covering an image pickup device (4), so that the aperture (1a) is opened and it is made possible to display a subject in an electronic viewfinder. When a release button is pressed, the set member (14) is rotated from the midway position to the set position and thus the aperture (1a) is covered with the first blade group (16). After this, when drive members (10, 12) are attracted to iron cores (8, 9) and the set member (14) is restored to the initial position, the drive members perform light exposure operation in order.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.