Patent ID: 8454249

Claim:
A focal plane shutter for cameras provided with a first blade driving means which makes a first blade leave an exposure aperture by putting a cocking member in its cocked position in the cocked state of the focal plane shutter, as well as in a state of the focal plane shutter in the completion of the exposure operation, and which makes the first blade cover the exposure aperture in the return operation of the cocking member, a second blade-driving first member which engages with and is locked by a locking member in the cocking operation of the cocking member so as to keep a second blade covering the exposure aperture and which makes the second blade leave the exposure aperture when the second blade-driving first member is released from the engagement with the locking member just before the cocking member reaches its cocked position, and a second blade-driving second member which is rotated by the cocking operation of the cocking member in a rotation direction bringing the second blade-driving second member to its cocked state and which rotates the second blade-driving first member in the exposure operation in a rotation direction in which the exposure operation of the second blade-driving first member is performed, so as to make the second blade cover the exposure aperture.