| 摘要 |
PURPOSE:To prevent photograph being taken in more than the specified number of frames of a film by loading a photographic film providing a perforation eliminating part after the specified number of frames in a camera main body installing a shutter charging mechanism whose driving source is the rotation of a sprocket as one body. CONSTITUTION:When filming of 24th exposure is completed in the case of 24 exposures of film, the sprocket 10 touches the perforation eliminating part 101 even if a film 2 is wound with a winding knob 6 after that, so that it can not receive a rotating force from the film 2. Therefore, a cam plate 11 integrated with the sprocket 10 does not rotate and a shutter charging plate 12 does not move, and a shutter blade 17, of course, can not be opened even if a release plate 14 is pushed. Then, after the specified number of frames only winding of the film with the winding knob 6 is executed and the photographing can not be executed at all. Thus, the photographing more than the specified number of frames can not be executed, so that a trouble that a deep black part emerges in a part of a developed screen caused by photographing more than specified number of frames can be solved.
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