To prevent dust and the like from adhering to a click member disposed in an operation member and inhibits sounds from occurring from the click member.

An operation device 12 is provided on an exterior cover 3 and includes: an operation member 30 having a space therein; a click member 34 disposed in the space of the operation member; and a dust proof member 32 preventing dust from intruding into the space where the click member is disposed and pressing the click member against the exterior cover.