Patent ID: 6601822
Filing Date: 2003-08-05
Classification: F16K,Y10T

Abstract:
An electromagnetic driving device comprising;a coil; a movable element; and a fixed element having a housing portion in which the movable element is housed to reciprocatingly move, and an attracting portion toward which the movable element is attracted by magnetic flux to be generated upon energizing the coil, wherein the housing portion is provided at a position thereof radially opposed to the movable element with a ring portion connected with the attracting portion so that the housing portion and the attracting portion are formed into an integrated piece, and the ring portion is provided with at lease one through-hole radially penetrating a wall of the ring portion, the at least one through-hole restricting direct flow of the magnetic flux between the housing portion and the attracting portion so magnetic flux flows via the moveable element between the housing portion and the attracting portion.