| 摘要 |
PURPOSE:To prevent an accident due to a forgetfully unswitched state, etc., by providing a means which automatically switches to a focusing photodetecting element side for a normally used general interchangeable lens when interchangeable lenses are changed, and a forcibly switching means for other interchangeable lenses. CONSTITUTION:While any interchangeable lens is mounted on a camera body, a lock pin 4 projects from a lens fitting mount 2 and a coil spring 10 in a guide member 8 extends to natural length and has weak elastic force, so a lock plate 5 rotates by the tensile elastic force of a coil spring 14 until a lock part 5b comes into contact with a lock member 13 to bring the movable contact piece 12a of a changeover switch into contact with the fixed contact 12b, thus switching the switch to a focusing photodetecting element side for a general interchangeable lens. When the general interchangeable lens is mounted, the lock pin is pressed in to increase engaging force. When another interchangeable lens is mounted, forcible switching is performed by using a lever 7. Therefore, an accident due to a forgetfully unswitched state is prevented. |
