| 摘要 |
PROBLEM TO BE SOLVED: To provide a small aperture mechanism for a camera which can regulate one small opening by using two aperture blades and reduce a planer area orthogonal to an optical axis. SOLUTION: Two aperture members 14, 15 can rotate on shafts 14a, 1f. A driving pin 6b integrally coupled to a rotor 6 of a motor is fitted to slots 14c, 15b. When an image is shot by using the small opening of an aperture, the rotor 6 rotates counterclockwise and both of the aperture blades 14, 15 rotate clockwise. When the aperture blade 15 abuts on a stopper 1h and stops, a circular opening of the aperture is formed by aperture regulating edges 14b, 15a. When an image shooting is finished, the rotor 6 rotates clockwise and the aperture blade 14 abuts on a stopper 1g and stops. Since the aperture blades 14, 15 are overlapped, an accommodating area is very small.
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