handling this button, the locking mechanism is released.
Meanwhile, in the case the lens barrier is urged by the compression spring toward the open position, the compression spring intervenes between the lens barrier and the camera body. In this case, it is necessary to urge the lens barrier from the closed position toward the open position even when the lens barrier is set to the open position. By the way, when the lens barrier is set to the closed position, the compression spring is more compressed in comparison with the state in that the lens barrier is set to the open position. The compression spring has a limit of length at the time of compression. Thus, there is a shortcoming that a movement amount of the lens barrier isat the closed position. Under this state, the lens barrier is moved again to the lock switch position to release the lens barrier locked at the closed position.
The lens-barrier device comprises another mechanism for urging the lens barrier toward the open position. This urging mechanism is constituted of compression springs, a press member, and a slider. The compression spring urges the lens barrier toward the open position. The press member abuts on one end of the compression spring, and is moved together with the lens barrier. The slider abuts on the other end of the compression spring, and is moved within a predetermined range together with the lens barrier when moving the lens barrier from the closed position to the lock switch position.
In the present invention, the locking