Patent ID: 8197150

Claim:
A focal plane shutter for digital cameras comprising: a first driving member for front blade that connects a front blade, has a pressed portion and a restrained portion, and is rotatably mounted to a first shaft of a shutter base plate; a second driving member for front blade that has a pressing portion, is rotatably mounted to the first shaft, is rotated by biasing a front blade driving spring in photography, and causes a front blade to open an exposure aperture when the pressing portion presses the pressed portion in rotation of the second driving member and rotates the first driving member for front blade together; a set spring that directly or indirectly biases the first driving member for front blade so as to be rotated to a position where the front blade covers the exposure aperture in a set state; a rear blade driving member that connects a rear blade, is rotatably mounted to a second shaft of the shutter base plate, and is rotated by a biasing force of a rear blade driving spring in photography, and causes the rear blade to close the exposure aperture; a setting member that is rotatably mounted to a third shaft of the shutter base plate, is rotated from an initial position to rotate the second driving member for front blade and the rear blade driving member against the biasing force of each driving spring in an setting operation, maintains the driving members in the set state in a set position, and returns the driving members to the initial position after release of a camera and before start of photography exposure; and restraining means that has a restraining member that can go in and out of an operation path of the restrained portion, is mounted to the shutter base plate, can operate the restraining member in the operation path of the restrained portion immediately after finish of photography and before start of the setting operation of the setting member when the restraining member is outside the operation path of the restrained portion, and can operate the restraining member out of the operation path of the restrained portion in a restraining state of the restrained portion when the restraining member is within the operation path of the restrained portion.