| 摘要 |
PROBLEM TO BE SOLVED: To provide a pushbutton switch ensuring high reliability of the opening and closing operation of a contact part even at the time of the flow of micro current across the contact part. SOLUTION: A body 50 is formed to have an outside dimension corresponding to a mounting frame for a buried wiring appliance allowing the fitting of three such appliances having a standardized unit size as maximum. A plate 3 is attached to the front of the body 50, and three housing parts 51 are formed on the front of the body 50. Momentary switches 30 as small switches and rest springs 37 are arranged in the housing parts 51. Pushbutton switches 32 are formed to be operable with engagement projections 36 coupled to engagement grooves 53 formed on the internal surface of the housing parts 51 of the body 50. When an operation handle 43 is forcibly pushed inside, the flat pieces 37 of the reset springs 37 move so as to come near the tact switches 30, and the operation pieces 30a of the tact switches 30 are pressed by the rear side of the flat pieces 37b.
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