| 摘要 |
PURPOSE:To advance and rewind the film smoothly and lightly, by constituting unidirectional clutches, which are provided between an advancing shaft and an advancing spool and between a sprocket shaft and a sprocket, in the direction opposite to that of a unidirectional clutch provided between a rewinding shaft and a rewinding spool. CONSTITUTION:An advancing shaft gear 1, a sprocket shaft gear 3, and a rewinding shaft gear 5 are connected by a rotation transfer mechanism including unidirectional clutches 7, 8, and 9, and when they are rotated in the advancing direction, the sprocket shaft gear 3 is rotated in a rotation speed lower than that of a sprocket 4 rotated by a film, and the rewinding shaft gear 5 is rotated in a rotation speed higher than that of a rewinding spool 6 rotated by the film. When they are rotated in the rewinding direction, the sprocket shaft gear 3 is rotated in a rotation speed higher than that of the sprocket 4 rotated by the rewound film, and the advancing shaft gear 1 is rotated in a rotation speed higher than that of an advancing spool 2 rotated by the film. |
