A focal plane shutter for cameras is provided with a shutter blade which can
be
actuated to both directions for opening and for closing a photographing optical
path by an electromagnetic apparatus. When a rotor is rotated to the direction
corresponding to the direction of conduction of coils an actuating member which
is formed in one with the rotor make arms rotate by its actuating pin and actuates
four blades of the shutter blade about upward and downward direction. A brake member
rotatably arranged together with on a friction plate on a shaft has bent portions
formed near tip portions of the arm portions which are inserted in a slot on a
shutter base plate. An operation for opening the shutter blade is braked by the
actuating pin contacting, pressing and moving one of the bent portions at termination
stage, and a closing operation is braked by the actuating pin contacting, pressing
and moving another bent portion at the termination stage. Thus the shutter blade
can be braked suitably at the termination stage and stopped early.
