| 摘要 |
PURPOSE:To remove the complexity of operation and malfunction by using one point in a diaphragm stroke as a starting point and obtaining a control diaphragm value on the basis of clocking time. CONSTITUTION:The movement of the diaphragm is transmitted to an expansion locking mechanism by a lever 48 interlocking with a diaphragm regulating lever 41 through a driving shaft 53, and since an armature 131 is arranged on a lever 130 fixed on one end of the driving shaft 53, the armature 131 is slided on a printed substrate 134 arranged on a surface opposed to the armature 131, while interlocking with the lever 130. Patterns 132, 133 are formed on the printed substrate 134, and at the opened position of the diaphragm, both the patterns are shorted through the armature 131. At the start of stopping operation, the pattern 132 is disconnected from the pattern 133 at a point stopping the diaphragm up to a half step from the opening of the diaphragm. A time control circuit 135 controls the time of the diaphragm from said point in accordance with a time table. |
