To reduce the occurrence of a fault, etc., by forming projecting parts surrounding press button parts in one body on the holding part surface side of an operating member so as to prevent the generation of the short-circuit or disconnection of a circuit.

Projecting parts (rising parts) 41 totally surrounding the plural press button parts 35 are formed in one body at a position between the periphery of the parts 35 and plural through holes 40 on the surface side of the holding part 34 of the operating member 31 of a switch. In addition, projecting parts (rising parts) 42 are formed in one body also at the peripheral part of the surface side of the holding part 34 of the operating member 31 of a switch. By constitution like this, even when rain water, etc., is infiltrated from the gap between the wall face of the button hole 43 of an upper case 2 and the wall face of the press button part 34 of the member 31 of the switch and infiltrated inside through the gap between the lower tip face of a wall part 44 and the part 34 of the member 31, the rain water is prevented from furthermore infiltrating.