Patent ID: 6922124

Claim:
An electromagnetic drive device having a stator body composed of a core portion and a yoke portion serially arranged in axial alignment with a non-magnetic portion placed therebetween, a plunger slidably received in an inner bore formed in at least one of said yoke portion and said core portion in said stator body and resiliently urged in one direction, and an electromagnetic coil for exciting said stator body to move said plunger in the axial direction of the plunger against the resilient force, wherein said stator body is constituted by piling up in the axial direction and bodily joining a plurality of core portion annular plate elements made of a magnetic material to form said core portion, a plurality of yoke portion annular plate elements made of a magnetic material to form said yoke portion, and a plurality of non-magnetic portion annular plate elements made of a non-magnetic material to form said non-magnetic portion.