| 摘要 |
PURPOSE:To eliminate malfunction of releasing by associating a state memory holding mechanism which mechanically captures the opening completion signal of shutter blades or shutter blades serving also as a diaphragm to a driving device. CONSTITUTION:When a release lever 15 is pushed, a switch associated with this lever 15 operates to drive an exposure control circuit. A driving device 1 is operated by the current from this control circuit and causes a moving arm 2 to open and close blades. The 1st lever 7 is kicked out and turned instantaneously largely in the state of the imaginary line of the figure against a spring 6 by the rate of overlapping of the moving arm 2 at the opening of said blades, by which the 2nd lever 9 is turned counterclockwise, and the pawl part 9a thereof drops into the low face 7c continuous with the detaining stepped part 7b of the 1st lever 7. In this dropped state, the 1st lever 7 is reset by the spring 6, hence the leading end pawl part 9a is hooked by the detaining step part 7b and is locked. Namely, the opening state of the blades is stored and held. |
