Patent ID: 7091807

Claim:
An electromagnetic device comprising: a magnetic path including first and second magnetic path parts, and a leg part connecting the first and second magnetic path parts; an attraction coil disposed in the magnetic path and arranged to generate a magnetic flux; a repulsion coil disposed in the magnetic path and arranged to generate a magnetic flux; a plunger disposed in the magnetic path and arranged to move to and from one of the first and second magnetic path parts by at least one of electromagnetic forces of the attraction coil or the repulsion coil; and a starting flux generating section disposed between the attraction coil and the repulsion coil in the magnetic path, and arranged to generate a magnetic flux so that the magnetic flux of the starting flux generating section and the magnetic flux of the repulsion coil repulse magnetically each other at a part of the magnetic path to start the plunger, wherein the magnetic flux of the attraction coil, the magnetic flux of the repulsion coil and the magnetic flux of the starting flux generating section flow in the same direction at a start of actuation of the plunger.