Multi-window type display device

Claim 1

A multi-window type display device, which comprises, in combination, a plurality of display windows, a plurality of display units at least one of which is provided at each of said display windows, and one light source common to all the display units and located to the rear of said display units; each of said display units comprising a display body disposed at the rear side of one of said display windows; an electromagnet comprising a Ushaped iron core, the legs of said U-shaped core extending towards said display window and terminating in two pole ends and an energizing winding means adapted to alternately magnetize said iron core in one direction or the other opposite direction such that said two pole ends are always oppositely polarized; a unit case mounted over the surfaces of both poles of said iron core, said case including a passage and containing therein a permanent magnet, one pole of said permanent magnet facing in the direction of said display window and the other pole of said permanent magnet facing away from said display window, said permanent magent being adapted to be slid along said passage formed in said case from one pole to the other pole of said electromagnet, said passage being provided with a convex shoulder at the center portion of the sliding surface of said passage and protruding towards the interior of said passage, whereby said permanent magnet is stopped by said shoulder irrespective of any vibration shock from outside and is made to jump over said convex shoulder when said magnet is moved from one pole tip to the other pole tip of said electromagnet in response to the magnetization direction of said electromagnet poles, said case having a slot positioned therein and said permanent magnet being provided with arm means protruding from said case through said slot, said arm means supporting said display body, whereby said display body is, while being irradiated by said light source from the rear side thereof, moved to a position corresponding to the position of said permanent magnet, thereby achieving a display operation.