| 摘要 |
PROBLEM TO BE SOLVED: To restrict acceleration of a plunger in the direction in which a contact is closed, in an electromagnetic solenoid device that opens/closes the contact.SOLUTION: An electromagnetic solenoid device 1 comprises: a vent 70 where a slide space S for a SL2 plunger 47 is open to outside, and a pressure release valve 71 that opens/closes the vent 70. The structure of the electromagnetic solenoid device 1 is such that while the pressure release valve 71 is closed, the slide space S is closed and pressure in the slide space S increases as the SL2 plunger 47 moves toward one end (in the direction in which a contact is closed), and when the pressure becomes equal to or higher than a predetermined value, the pressure release valve 71 opens and pressure decreases. In this structure, since the slide space S is sealed when the pressure release valve 71 is closed, the pressure in the slide space S acts in the direction in which the SL2 plunger 47 is pushed back (opposite direction to the direction in which the SL2 plunger 47 moves). Accordingly, excessive acceleration of the SL2 plunger 47 can be prevented. Additionally, an excessive pressure increase in the slide space S can be restricted by the pressure release valve 71. |
