| 摘要 |
PURPOSE:To simplify working upon the body between rotary plates and facilitate assembling by using two sheets of rotary plates and disposing respectively a half number of sheets of movable blades between said body and the respective rotary plates. CONSTITUTION:Respectively one ends of a half number of movable blades 3 are pivotally supported on one surface of a body 1, the pins 4 at the respectively other ends of the movable blades 3 by every half number are inserted and engaged in the respective slits 6 of two sheets of rotary plates 2, and both rotary plates 2 are simultaneously rotated with respect to the body 1, whereby the iris is changed. As a result, the movable blades 3 are located by the body 1 and this makes the connection between the movable blades 3 and the rotary plates 2 easy. |
