| 摘要 |
PURPOSE:To permit always normal photographing by supplying electricity intermittently to a motor so as to move a mirror downward in an initial period of release operation when the mirror is up before, for example, photographing. CONSTITUTION:Now, if electricity is supplied to respective parts by release operation while a mirror 2 is up prior to photographing, emitter-collector current flows largely to a phototransistor 11. As a result, transistors T5 and T2 go on, and current flow intermittently to a coil Lm 17, then the coil 16 wound with the coil 17 moves rightward on an iron core 15. This forces the 1st crank lever 4 and the 2nd crank lever 6 to oscillates. When a fulcrum shaft 2b is located to the right side beyond the neutral part with respect to the line connecting shafts 5 and 3 during the oscillating process of the levers 4, 6, a toggle spring 7 acts as the force for moving the mirror 2 downward. Since the mirror operating mechanism is moved downward by this, the always normal photographing is made possible. |
