| 摘要 |
PROBLEM TO BE SOLVED: To provide a push button switch structure which does not make air bubbles remain even if the pressure is small, and prevents an overflow of adhesives when an insulator is adhered. SOLUTION: The push button switch comprises a plurality of connection terminals 1f, 1g formed at the side end part of an insulation board, a central fixed contact point 1a and a peripheral fixing contact point 1b connected by the plurality of connection terminals 1f, 1g and conductive patterns 1c, 1e, formed so as to face each other on the insulation board 1, a dome-shaped movable contact 3 reversal turn capably formed on the central fixed contact point 1a and the peripheral fixing contact point 1b, electrically connecting the central fixed contact point 1a with the peripheral fixing contact point 1b by reversal turning, and an insulation film 2 stuck on the conductive pattern 1e while covering the upper part of the insulation board 1, supporting the movable contact point 3 on the insulation board 1. A groove 1h, releasing the air bubble generated when pressurized, is formed at the part where the insulation film 2 is stuck on the conductive pattern 1e.
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