| 摘要 |
<p>PURPOSE:To make the mechanism of the device simple by providing an automatic selective change-over means for allowing constant-length feed operation to be made by the rotating force of a winding system when no film is loaded in the camera. CONSTITUTION:When the shutter is released from the state of the figure, a lever 28 moves in the direction shown by an arrow, and a lever 28 turns clockwise, then its other end part 27a detaches from a notched part 24a and its end part 27a turns a switch 38 on. Then, a motor 31 runs to revolve a spool gear 9 and revolve a spool 10, but since no film is loaded, a sprocket 34 does not rotate. The revolution of the spool gear 9 revolves a gear 13 in the direction shown by an arrow by way of idler gears 11, 12, 13, then a disc 24 and a cam 25 are rotated by a one-way clutch 14b via gears 14, 17. As the cam 25 revolves, the shutter is charged and as the disc 24 makes 1 turn, the end part 27a of the lever 27 drops into its notched part 24a and all the operations end. At the same time, the switch 38 goes on, thereby cutting off the power supply to the motor 31.</p> |
