| 摘要 |
PURPOSE:To make a shutter small-sized, by bearing a rear curtain winding drum singly by a supporting member, and also mounting a front curtain winding pulley to the upper and lower end parts of a front curtain winding axis provided by piercing said rear curtain winding drum and the supporting member. CONSTITUTION:Front curtain winding pulleys 4, 5 having the same diameter, and a rear curtain winding drum 2 are placed eccentrically a little, by whih positions of mouthpieces 9, 14 in case of winding a shutter are made nearer the side of the pulleys 4, 5 and the drum. Therefore, 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 same, the winding mechanism, etc. are simplified remarkably, and also since the diameter of the pulleys 4, 5 and the drum 2 is same, the inertia is put in order easily. |
