| 摘要 |
PURPOSE:To improve the usability of a camera by preventing the erroneous operation of a user by automatically winding a film without exposure by detecting the remaining amount of an unexposed film and generating a warning tone at a prescribed point in time. CONSTITUTION:The length of an unexposed film is detected by a detecting circuit 100 and when the remaining amount of the film becomes less, a subject paper feeding circuit 102 stops feeding a body to be recorded to a recording part. Further, the detection signal turns on a warning display device 108. Furthermore, the detection signal puts a film winding driving circuit 104 in operation to make a winding for a prescribed time without exposure. Simultaneously with that, a warning tone circuit 110 operates to let a user know the state of the nonexposure winding. On the nonexposure winding, its end signal and the output of the circuit 100 permit the circuit 110 to generate a continuous warning tone. |
