| 摘要 |
PROBLEM TO BE SOLVED: To provide a built-in permanent magnet type solenoid that can suppress increase of the amount of magnetic flux passing through a suction part and surely reduce the suction force even when the magnetic flux occurring in a coil is larger with respect to the magnetic flux of a magnet.SOLUTION: A disc-shaped permanent magnet 13 which is in close contact with a side wall surface 11a is provided inside a body 11, the permanent magnet 13 is formed to be concentric to the inner diameter of the body 11, and the outer diameter has a gap for the inner diameter. A disc-shaped stopper 14 is in contact with the lower surface of the permanent magnet 13, and the outer diameter of the stopper 14 has an air gap 15 for the inner diameter of the body 11. A coil bobbin 16 is inserted and fitted in the inner diameter of the body 11, and a guide 17 is inserted and fitted to the coil bobbin 16. A plunger 19 is inserted and fitted in the inner diameter of the coil bobbin 16, and displaced by electromagnetic force of magnetization of the coil bobbin 16.SELECTED DRAWING: Figure 1 |
