Focal-plane shutter for digital still camera
US6749348B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 28, 2003 |
| Grant date | Jun 15, 2004 |
| Priority date | — |
| Expiry date | Jul 28, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B9/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A first blade is made up of two arms and three blades supported by the arms, wherein one of the arms is rotated in the clockwise direction by a driving pin pressing a pressed portion thereof only when a first-blade driving member is rotated by the force from a driving spring, and the other arm is reciprocally rotated by an output pin fit to a slot when a motor is reciprocally rotated. A second blade is made up of two arms and three blades supported by the arms, wherein one of the arms is reciprocally rotated by a driving pin fit to a slot when a second-blade driving member is reciprocally rotated. One of two action methods can be selected by determining a driving sequence for the first-blade driving member and the motor as to the first blade. Thus, the present invention provides a focal-plane shutter for a digital still camera which can take a picture with both the normally-open method and the normally-closed method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.