Focal-Plane Shutter

A focal-plane shutter comprising:

• a base plate having an opening for exposure;
• blade components installed in a freely movable manner in the base plate that open and close the opening;
• driving components energized in one direction to activate the blade components;
• setting components that set the setting position of the driving components, acting against the biasing force, into a set position prior to shutter actions;
• a component being attracted provided in the driving members;
• and
• electromagnets that exert magnetic attraction, due to electrical conduction, upon the component being attracted while the driving members are set in their set-position, wherein
• the component being attracted includes an axis part, an attaching surface being installed on one end of the axis and coming in contact with and being attracted to the electromagnets, and a flange that is installed on the other end of the axis and also has a curved surface that is curved in a convex manner toward one end, and
• the driving member includes through-holes at designated spacings that allow the axes to be freely inserted, and two flat inclined surfaces that receive in two locations the curved surface of the flange.