| 摘要 |
PROBLEM TO BE SOLVED: To provide a switch mechanism for separating a contact set when an insufficient voltage condition is caused. SOLUTION: A level assembly 3 is included in this mechanism, and is pressed by a spring 9 to be pivotedly driven around any of two fulcrums 4 and 8 to close or separate a contact respectively. Only one side fulcrum position is related to one time movement of a lever assembly body 3, and the movements around one side and the other side fulcrum positions 4 and 8 close a contact set and separate a contact respectively. Insufficient voltage releases the retaining a plunger 7 by a solenoid 6 to commence action around the fixed fulcrum 8. The action of a reset button 10 by manual operation commences action around the movable fulcrum 4 when voltage is sufficient. An arm 5 is displaced by the plunger to shift the movable fulcrum, also returns the plunger at the time of resetting. The switch mechanism can be assembled into a current control device forming insufficient voltage by detecting electric defectiveness. |
