Patent ID: 7014168

Claim:
A solenoid actuator comprising: a solenoid; a plunger that is arranged substantially coaxially with respect to the solenoid; a stator that has a substantially annular shape defining an inner circumferential face; a cylindrical cup that is arranged radially inside of the inner circumferential face of the stator, the cup receiving the plunger such that the plunger is substantially axially slidable in the cup; a cylindrical yoke that radially surrounds the solenoid and an outer circumference of the stator; and a magnetic force transferring member that is axially inserted between a step portion formed in an inner circumference of the yoke and a radially outer portion of the stator to axially transfer magnetic force between the yoke and the stator, wherein the outer circumference of the stator radially forms a first gap with an inner circumferential face of the yoke therebetween, the inner circumferential face of the stator radially forms a second gap with an outer circumferential face of the cup therebetween, and the first gap is greater than the second gap.