Patent ID: 8193887

Claim:
A monostable permanent magnetic actuator using a laminated steel core, comprising: lamination cores formed as a plurality of metallic thin plates which are laminated to each other; a coil disposed to be adjacent to the lamination cores, and configured to apply a magnetic force to the lamination cores by an external power; a mover mounted in the lamination cores so as to be movable in upper and lower directions; permanent magnets installed at the lamination cores and configured to apply an upward and downward magnetic force to the mover; a guider configured to guide an upward and downward motion of the mover; and an elastic member configured to apply an elastic force to the mover in an opposite direction to the permanent magnets, wherein the mover comprises: a stem slidably inserted into a fixed core inside a bottom surface of a space defined between laminated cores; a head disposed above the stem; and a movable core disposed above the head and formed as a plurality of thin plates which are laminated to each other; and wherein the guider comprises: guide slots formed in the head in upper and lower directions; and guide bars supported by the fixed plates, wherein the mover moves in a state that the guide bars has been inserted into the guide slots.