An input device 34, wherein the step portion has a curved side surface, {HEAD ~ the operating unit} has {TAIL ~ a curved portion}, and the curved portion of the operating unit fits into the curved side surface of the step portion 
has
An input device 34 , wherein the step portion has a curved side surface , { HEAD ~ the operating unit } has { TAIL ~ a curved portion } , and the curved portion of the operating unit fits into the curved side surface of the step portion
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH