公开(公告)号：US4400074A

公开(公告)日：1983-08-23

申请号：US353031

申请日：1982-03-01

申请人： Kazuhiko Akiyama ,  Takeshi Yoshino ,  Michihiro Shiina ,  Shigeo Sato ,  Tetsuo Nishizawa ,  Toshio Yoshida ,  Nobuo Kobayashi

发明人： Kazuhiko Akiyama ,  Takeshi Yoshino ,  Michihiro Shiina ,  Shigeo Sato ,  Tetsuo Nishizawa ,  Toshio Yoshida ,  Nobuo Kobayashi

IPC分类号： G03B17/42 ,  G03B1/18 ,  G03B17/36

CPC分类号： G03B17/425

摘要： An automatic rewinding camera wherein an automatic advance of the photographic film by one frame is caused by shutter release operation and rewinding of the photographic film is automatically started when the film is prevented from further advance. The camera has a film-driven sprocket wheel, by the rotation of which film movement signals are produced. A timer circuit maintains, during the passage of a predetermined active time which is shorter than the time required to advance the photographic film by one frame, the camera motor in forward rotation so as to advance the photographic film. The timer circuit is reset by the film movement signals. But when those film signals stop, that is, when the film is fully extended from the cartridge, then the timer is not reset; and the measurement of the full predetermined active time, by the timer, without resetting, results in the motor being reversed to rewind the film.

摘要翻译： 一种自动倒带摄像机，其中通过快门释放操作引起摄影胶片自动前进一帧，并且当防止胶片进一步前进时，照相胶片的倒带自动开始。 照相机具有胶片驱动的链轮，通过产生胶片移动信号的旋转。 定时器电路在比预定的活动时间短的过程中保持照相胶片前进一帧所需的时间，以使照相胶片前进。 定时器电路由胶片移动信号复位。 但是当这些电影信号停止时，也就是说，当胶片从墨盒完全伸出时，定时器不复位; 并且通过定时器对整个预定的活动时间进行测量而不进行复位，导致电动机被反转以倒带。