| 摘要 |
PROBLEM TO BE SOLVED: To provide an electromagnetic valve capable of improving attraction efficiency by a simple structure and capable of expanding adjustment width of coil attraction force.SOLUTION: An electromagnetic valve 1A is configured so that: a coil bobbin 31 composed of a non-magnetic material includes a cylindrical body 31a provided with a hollow hole 31e; a fixed iron core 34 includes a fixed iron core insertion part 34c to be inserted into the hollow hole 31e and an expanded diameter part 34a formed on a valve part side end face of the fixed iron core insertion part 34c and arranged on the outside of the cylindrical part 31a outer than the valve side end part; the expanded diameter part 34a is arranged so that an attraction area of an attraction surface 34d for attracting a movable iron core 35 is larger than a cross-sectional area of the hollow hole 31e and a non-magnetic member 31c surrounds a periphery of a portion where the expanded diameter part 34a is opposed to the movable iron core 35; and a magnetic member 37 includes a contact part 37c laid between the non-magnetic member 31c and a valve part 2 and brought into contact with an external cover 38 and an opposite arrangement part 37c arranged so as to be opposed to an outer peripheral surface of the movable iron core 35. |
