| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive and highly reliable fluid-power drive device of a circuit breaker, in which a solenoid can open a control valve with the prescribed voltage. SOLUTION: Between the outside of a case 7 of a solenoid and a sleeve 6 of a control valve, a spring mechanism 10 removable to the drive direction of a plunger 2 is arranged. Further, to retain the position of the solenoid, a stopper 4 and a bolt 5 are provided, which are fixed to a body 6 or a sleeve 12 of the control valve.
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