| 摘要 |
PROBLEM TO BE SOLVED: To simplify a lens barrier device by independently moving a plurality of barrier blades. SOLUTION: In the lens barrier device 1, the first and second barrier blades 8 and 9 are rotatably fitted to the first shaft 6 disposed on a frame body 5, in which an opening 4 is formed in front of the lens 3 of a lens barrel 2. The third and fourth barrier blades 10 and 11 are rotatably fitted to the second shaft 7. The first and second springs 12 and 13 press the first to fourth barrier blades 8 to 11 in the direction in which the opening 4 is closed. When a rotation ring 16 that has the first and second cam engagement projections 14 and 15 is rotated, the first cam engagement projection 14 pushes cam faces 17 and 18 formed on the roots of the first and second barrier blades 8 and 9, and the second cam engagement projection 15 presses cam faces 17 to 20 formed on the roots of the third and fourth barrier blades 10 and 11, thereby moving the first to fourth barrier blades 8 and 11 to their closing positions. COPYRIGHT: (C)2009,JPO&INPIT
|
