To obtain a change-over operation mechanism for a switch aligning with a counterpart component to be attached inside a switch cover as well as suppressing deterioration in strength of the counterpart component.

A clicking spring 16 is provided with a clicking part 16c with a slit 16b in between on one side of an attaching part 16a and a switch operation part 16e is formed with a tipping over preventing part 16d in between. An operated end 17a is provided on a bottom side of a change-over switch 17 fixed by a switch cover 14, an electrical contact piece is projecting on a top surface, and the operated end 17a is protruding in a direction orthogonal to a moving plane of the click spring 16. A sliding part 15 is provided with a knob 15a going into a long hole 14d and the attaching part 16a of the clicking spring 16 is attached to the top surface of the knob 15a by a screw 18. A flexible print substrate 19 is connected to a side surface of the change-over switch 17 and a conductor of the flexible print substrate 19 is connected to the electrical contact piece of the change-over switch 17.