| 摘要 |
PURPOSE:To maintain the flatness of a film under an excellent condition even when the film is thin one, by judging that the film is thin one or normal one at the time of film loading from its sheet number information and informing the information. CONSTITUTION:Signals 1a-1d indicating the number of photographed sheets are installed to the surface of the patrone of a film F to be charged and 1a-1c of the signals 1a-1d generate 3-bit information depending on their surface, metallic or insulating substance, and the rest 1d always has a metallic surface irrespectively of the cartridge having different photographing number of sheets. Contacts pins 2a-2d are installed to the inside of the film charging chamber of the camera main body at locations corresponding to the signals 1a-1d. A film passage is formed by rails 3, external rails 4, and pressing plate 5 and a camera Ca side circuit and a bank cover B side circuit are connected with each other by means of contacts 6a and 6b. The circuits are connected with contact pins 7a and 7b, respectively, when the back cover B is closed. |
