| 摘要 |
PURPOSE:To load easily a film in a motor-driven camera with a simple mechanism by setting automatically a single-shot mode whenever the rear cover is open. CONSTITUTION:When the rear cover is opened, an on-off switch turns on and the Q output of an FFDF3 is zero, so neither of DF5 and DF6 is cleared and the output of DF3 is inputted to P terminals of DF5 and DF6 through an OR gate O5 to hold them set. Therefore, an input to an AND gate A9 goes up to 1 and its output is inverted by an inverter N2 and inputted to an AND gate A8. Consequently, the pulse of CC3 by the next release is not accepted by the DF5 and DF6. This state is therefore held and release winding is perforemed only once by turning on a release switch once. Thus, when the rear cover is opened, a single-shot mode is entered regardless of a frame speed mode, and the operability of the camera is improved considerably. |
