| 摘要 |
PROBLEM TO BE SOLVED: To prevent a pressurized part of a contact holder from sticking to an operation member when the operation member is pressed down up to the press-down position. SOLUTION: The operation member 14 is formed so as to alternate the state of being locked to an acting position and the state of being released from the locking by an operation of locking mechanism 21 every time when it is push down into a switch case 11. A printed board 30 fixed to the lower surface inside the switch case 11 has a fixed contact point 29. A contact holder 31 comprising a surrounding part 33 having a movable contact point 35, and a cylinder-shaped pressure receiving part 34, is formed on the printed board 30. The upper part of the pressure receiving part 34 is made to contact with a pressing part 16, and a space S is formed between them, and the space S is formed so as to communicate with outside through a groove part 16a formed to the pressing part 16.
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