| 摘要 |
In an operating unit, push buttons are integrally formed via a connecting section, and the top face of the connecting section abuts the bottom face of a panel. On side-faces of the push buttons, an outwardly protruding flange is integrally formed. The top face of the flange is set to be at a position higher than that of the top face of the connecting section. When one of the push buttons is pressed down, the operating unit is rotated about a point in the inside of another of the push buttons as a fulcrum so as to turn on the output of a switch member. Because the operating unit is rotated about the inside point as the fulcrum, other switch members cannot be switched.
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