| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to sufficiently obtain electromagnetic attraction force.SOLUTION: A stationary core 13 comprises: a stationary core tapered part 131 whose diameter widens toward an attraction direction A; and a stationary core first circular part 132 extending from an end part of stationary core tapered part 131 toward the attraction direction A whose outer diameter is constant. A movable core 16 comprises a movable core cylinder part 161 inside of which a movable core hole part 164, which is a space into which the stationary core tapered part 131 and the stationary core first circular part 132 can enter, is formed, and the movable core cylinder part 161 consists of a movable core cylindrical part 165 extending toward a non-attraction direction B with a constant inner diameter, and a movable core tapered cylinder part 166 in which a diameter of inner peripheral surface becomes narrower from an end part of the movable core cylindrical part 165 toward the non-attraction direction B. Accordingly, an air gap in starting energization can be made smaller. Further, a facing area of a facing surface between the stationary core and the movable core 16 can be made larger. |
