Patent ID: 8269588

Claim:
A bistable actuator, comprising: a cylinder formed by rolling a thin plate so as to form an inner space; a mover reciprocatingly installed within the cylinder in a lengthwise direction of the cylinder; first and second coils installed near both end portions of the cylinder, respectively, by interposing the mover therebetween; an intermediate plate fixed into the cylinder and formed by laminating a plurality of thin plates; and a plurality of permanent magnets fixed to the intermediate plate between the first and second coils, wherein the intermediate plate has a rectangular outer appearance and is provided with a through hole through which the mover is inserted, wherein the plurality of permanent magnets are fixed to an inner surface of the through hole, and wherein magnetic flux attraction plates are attached onto surfaces of the plurality of permanent magnets, respectively, each of the magnetic flux attraction plates being formed by laminating a plurality of thin plates.