Device and method for electromagnetically activating the shutter of a camera

摘要

A device and method for electromagnetically activating the shutter of a camera to provide different aperture openings comprises: an armature having a core and a coil, the core is capable of receiving current, and the armature will produce a first magnetic field; a movable magnet member that produces a second magnetic field at one of its two ends, the second magnetic field is coupled to the first magnetic field and the other end of the member is coupled to one or more shutters; and a circuit capable of receiving current coupled to a coil for setting the direction of current flow in the coil to a first direction or a second direction or for denying the presence of current flow in the coil so that when the coil receives no current a first magnetic field will not be present and the member will be at a first location and move one or more shutter elements to block the aperture and allow no light to enter the camera, and when current flows through the coil in a first direction the member will be attracted by the first magnetic field and move to a second location and move one or more shutter elements to form a first aperture size and if current flows through the coil in a second direction the member will be attracted by the first magnetic field and move one or more shutter elements to form a second aperture size.