| 摘要 |
PURPOSE:To make change-over of automatic focusing and manual focusing easy by transmitting the driving force of a cam for driving the taking lens by way of freely connectable and disconnectable relaying lever and taking lens drive lever. CONSTITUTION:The driving force of a taking lens drive cam 10 is transmitted by way of a relaying lever 14 and a taking lens drive lever 16, whereby a taking lens 15 is moved on the optical axis. An electromagnetic member 19 is then energized by the focusing signal at the focusing corresponding to the distance measured with a movable mirror 2 and a coupling lever 18 is oscillated in the counterclockwise direction by way of a movable piece 20. This causes the levers 14, 16 to be disconnected, so that the driving force of the cam 10 is not transmitted to the lens 15 and automatic focusing is thus accomplished. On the other hand, this lever 18 responds to the manual operation of a change-over knob 22. Hence, if the levers 14, 16 are disconnected manually and the lever 16 is manually moved by the pin 22e of the knob 22, the focusing is easily changed over to manual focusing. As a result, even if no automatic focusing signal is generated, photographing is performed by manual focusing without losing shutter chance. |
