| 摘要 |
PURPOSE:To eliminating irregularity of exposure due to the bounding of a diaphragm by delaying the springing-up operation of a mirror through a speed adjusting device in the diaphragm and mirror driving mechanism of a single-lens reflex camera. CONSTITUTION:When an electromagnet 64 releases an attracted piece 65 in a charging state, an actuation member 61 presses levers 29 and 40. Since a diaphragm release lever 29 releases a diaphragm driving member 9, stopping-down operation starts. On the other hand, a speed adjusting mechanism release lever 40 releases the pin 53 of a sector gear 41, so a speed adjusting mechanism consisting of a pinion 48, an escape wheel 47, and a pallet fork 29 operates. The sector gear rotates at a low speed and after the preset time when the bounding of a diaphragm decreases sufficiently to a suppressed value, a pin 55 presses a release lever 11 to release a reflecting mirror driving member 5. |
