| 摘要 |
PURPOSE: A push button is provided to prevent the breakage of a switch and a circuit substrate though excessive outer force is applied. CONSTITUTION: A control panel(10) has a switch(13) to turn on/off various functions. A loading groove(11) is arranged in a control panel concavely. A button(21) is installed in the loading groove to be moved within a certain distance. A push member(22) is installed to penetrate through the loading groove. The push member pushes the switch by moving with power from the button. A first spring(23) and a second spring(23) have different spring constants. Thereby, excessive outer force is absorbed in the first spring though the excessive outer force is transferred.
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