| 摘要 |
PURPOSE:To couple transmission mechanisms surely and easily by providing clutch levers which are pivotally fitted to the turning ring on camera side and can move into and out from the inside of the rotating diameter of a coupling pin on lens side. CONSTITUTION:When a lens is mounted, the coupling pin of the lens is inserted into a turning ring 1. As the lens is rotated, the pin is moved clockwise and forces and turns counterclockwise the 1st clutch lever 2 which is pivotally fitted to the turning ring and is held energized to turn clockwise. Then, the 2nd clutch lever 3 which is pivotally fitted to the ring 1 and is held energized to turn counterclockwise is forced downward, and the coupling pin is sandwiched by the 1st and 2nd clutch levers, whereby the coupling is completed. At this time, a switch 30 is changed over, and an AF driving circuit is formed. To remove the lens, a bevel gear 10 can be turned by pulling a spring 12, and therefore all required is to turn the lens counterclockwise and to pull it in a prescribed position. |
