| 摘要 |
PCT No. PCT/JP85/00314 Sec. 371 Date Jan. 21, 1986 Sec. 102(e) Date Jan. 21, 1986 PCT Filed Jun. 4, 1985 PCT Pub. No. WO86/00168 PCT Pub. Date Jan. 3, 1986.An electromagnetic actuator comprises a stationary element made of soft magnetic material which element has a plurality of magnetic poles, a magnet one magnetic pole of which is secured to the stationary element, a movable element made of soft magnetic material which element is faced with the magnetic poles of the stationary element and the other magnetic pole of the magnet through narrow gaps so as to form a magnetic circuit arranged in parallel to the direction of magnetic flux generated by the magnet, and a coil element wound around the stationary element which coil is so arranged as to energize the magnetic circuit in series. When electric current is flowed through the coil, the balance of magnetic force between these magnetic fluxes loses and therefore, the movable element is reciprocally moved with respect to the stationary element. This device can be actuated with a large moving force generated by a fine current.
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