| 摘要 |
PURPOSE:To operate a shutter with a small number of components, by operating a driving member by a release operation and by providing the driving member on an iron piece lever which is controlled by an electromagnet connected to an exposure control circuit. CONSTITUTION:When a release plate 4 is depressed, a switch S1 is closed, and an electromagnet 10 is excited by an exposure control circuit 11 to attract and hold a piece 12 to be adsorbed. When the release plate 4 is depressed furthermore, detention due to a detaining pawl 7 is released by the terminal to operate a driving member 6 in the right direction. Then, a switch S2 is opened, and a shutter blade 2 is turned to start exposure; and after the elapse of a desired time, the electromagnet 10 is degaussed, and the piece 12 is separated from the electromagnet 10, and thus, an iron piece lever 5 is turned to the right by a spring 5i energized preliminarily, and the driving member 6 is not only turned to the right around a shaft 6a but also operated in the right direction by a spring 6h, and detention of a projection 6d is released to turn a switching member 3 to the left, and the shutter blade 2 is turned to complete exposure. |
