| 摘要 |
PURPOSE:To make the external size of a shutter small, by providing a mechanism for connecting a rear curtain winding drum and a front curtain winding pulley, in said rear curtain winding drum. CONSTITUTION:Front curtain winding pulleys 4, 5 having the same diameter, and a rear curtain winding drum are placed eccentrically a little. Therefore, since positions of mouthpieces 9, 14 in case of winding a shutter are made nearer the side of the pulleys 4, 5 and the drum 2, the initial running distance of a front curtain 13 and a rear curtain 8 can be made long and a curtain speed is stabilized. Since a speed of rotation of both the pulleys 4, 5 and the drum 2 is the same, the winding mechanism, etc. are simplified remarkably, and also since the dimeter of the pulleys 4, 5 and the drum 2 is same, the inertia is put in order easily. |
