To provide an operation button device improved in user-friendliness and visibility by an inexpensive method in which a button switch in a long shape may be easily turned on by preventing seesaw movement even when an end portion of the button is pushed.
A button attachment base part 31 is connected to a button support part 32 formed in each end portion along the lengthwise direction of a button part 26, and an inside button pushing part 41 of the button part 26 is constructed so that a switch 35 may be operated by a switch pushing part 42 of an inside button part 37. An L-shaped rib 43 is formed in an outer edge portion along the lengthwise direction of the button part 26, and the L-shaped rib 43 is caught between an inner wall of a panel 21 and a sheet (intermediate layer) 39 adhered onto a control device 33, so as to prevent seesaw movement of the button part 26. Thus, user-friendliness and visibility may be improved.
KOBAYASHI SHINICHIRO
Daisuke Nagano
Kentaro Fujii