Patent ID: 6414406
Filing Date: 2002-07-02
Classification: H01F

Abstract:
A solenoid actuator for driving a driven member by an electromagnetic force such that said driven member performs reciprocating motion, comprising:at least one electromagnet; an armature connected to said driven member, for performing reciprocating motion in accordance with energization and deenergization of said at least one electromagnet to thereby drive said driven member such that said driven member performs said reciprocating motion, said armature having two end faces extending in parallel with each other in a direction orthogonal to a direction of said reciprocating motion thereof; and guide means having two guide surfaces opposed to said two end faces of said armature, respectively, said two guide surfaces being formed with a total of at least three protrusions at respective locations, each of said two guide surfaces being formed with at least one of said at least three protrusions, said guide means slidably guiding said reciprocating motion of said armature in a state of said two end faces of said armature being in partial contact with said at least three protrusions of said two guide surfaces of said guide means.