Patent ID: 8680956
Filing Date: 2014-03-25
Classification: H01F,H01H

Abstract:
1. An electromagnet device comprising: a fixed core; a movable core; a permanent magnet in which one surface of magnetic poles faces said movable core and the other surface of the magnetic poles is fixed to said fixed core; a shaft which is connected to said movable core; an electromagnetic coil which is located so as to wind around said shaft; and an open spring which comes into contact with a surface substantially perpendicular to said shaft of said movable core in a movable range of said movable core, wherein, in the case of being located at one of utmost positions of the movable range of said movable core, one of utmost positions being a position in which said movable core comes into contact with said fixed core, arrangement is made coaxially in the order of said open spring, said movable core, said electromagnetic coil, and said fixed core from said shaft toward the outside; and arrangement is made such that the whole or a part of each axial dimension of said open spring, said movable core, said electromagnetic coil, and said fixed core are overlapped with each other in the case of being seen in a radial direction of said shaft.