To provide a sheet type push-button switch, in which reliability and appearance of the product are excellent, and high contact reliability is obtained.
A plurality of sets of fixed contact points 9, 10 composed of a pair of the peripheral fixed contact point and the center fixed contact point are installed on a circuit substrate 8, and a sheet member 12 is fixed on this circuit substrate 8 via a spacer 11, and a dome-like movable contact point is housed in a housing hole 11a formed in the spacer 11. A plurality of protruding parts 5c are formed so as to surround the vertex 5a on the inner side of the movable contact point 5, and when the vertex 5a is set as the pressurized part and the movable part 5 is reversed, the vertex 5a becomes the movable region, and the protruding part 5c is made to be contacted to the center fixed contact point 10.
IWAMA HISAYA
YAMAGATA TAKEO
Ichiro Suzuki
Hirohiro Ichimura
Kazuo Kobayashi
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