Patent ID: 6566990
Filing Date: 2003-05-20
Classification: F01L

Abstract:
An electromagnetic actuator comprising:a first and a second electromagnet, each comprising a stator and a coil, and opposing each other in an axial direction of said actuator with a gap disposed therebetween, a disc-shaped armature mounted in said gap so as to be reciprocable in said gap in the axial direction, said armature having a surface opposing said first electromagnet, and a hole formed so as to extend in the axial direction, said first electromagnet having a guide hole extending therethrough in the axial direction and communicating with said gap, and a first stem extending through said guide hole and having one end thereof protruding into said gap and slidably inserted into said hole formed in said armature for transmitting a force that acts on said armature to an external load, said first stem having at said one end thereof a first abutment surface that is not parallel to the axial direction, said hole having an inner wall partially formed with a second abutment surface that is not parallel to the axial direction and adapted to engage said first abutment surface, thereby preventing said first stem from moving toward said second electromagnet relative to said armature with said first and second abutment surfaces engaging each other.