| 摘要 |
<p>This shutter opening/closing mechanism (100) has: a rectangular frame body (10); shutter plates (20a, 20b, 20c) installed rotatably to the frame body (10) at shutter rotary shafts (41a, 41b, 41c) provided to positions towards one side edge (22a, 22b, 22c) of shutter surfaces (21a, 21b, 21c); shutter arms (40a, 40b, 40c) that are affixed towards one side edge (22a, 22b, 22c) and are each inclined with respect to the shutter plates (20a, 20b, 20c); and a spring (50) that is provided across shutter arm (40a) and shutter arm (40b). By means of selectively attaching one end of the spring (50) to either a spring attachment section (45a2) or a spring attachment section (45a1) provided to shutter arm (40a), it is possible to alter the characteristics of the torque assisting the opening/closing of shutter plate (20a).</p> |
