| 摘要 |
PROBLEM TO BE SOLVED: To prevent chattering from being generated when opening/closing a contact in a counter contact switch, and to avoid an arc.SOLUTION: In a structure, not for mitigating the inertia of a gravity mass of a movable contact 8, an elastic contact part 9b composed of a metal elastic member 9 is provided outside of a fixed contact 10, the elastic contact part 9b is brought into contact with a solid contact part 8a in the process where the movable contact 8 approaches the fixed contact 10 in a switch-on operation, thereby forming a bypass circuit, and the movable contact 8 is brought into contact with the fixed contact 10 just after that, thereby completing a normal circuit. In a switch-off operation, reversely, the movable contact 8 is first detached from the fixed contact 10 of the normal circuit, the elastic contact part 9b of the bypass circuit and the solid contact part 8a are detached just after that, an arc which is generated in electric circuit detachment is generated between the elastic contact part 9b and the solid contact part 8a, and the arc is not generated between the fixed contact 10 of the normal circuit and the movable contact 8 at all. |
