| 摘要 |
PROBLEM TO BE SOLVED: To prevent unexpected input to an operation input member, in an apparatus comprising the operation input member, and to prevent a size of the overall apparatus from depending on a size of the operation input member.SOLUTION: As an operation input member, a push-button is divided into a push-button head 10 (an operation member body) and a push-button shaft 15 (an operation transmission member), and the push-button head 10 is made movable along an outer circumferential surface of a case body 20 between a first position P1 where an input operation can be transmitted to the push-button shaft 15, and a second position P2 where the input operation cannot be transmitted. The push-button head 10 is moved to the second position P2 by an outer ring 30 (a moving mechanism) in the case of no need. Therefore, when there is unexpected input to the push-button head 10, that input is prevented from being transmitted to the push-button shaft 15, such that, as the overall push-button, unexpected input is prevented, and the outer ring 30 (the moving mechanism) is also provided for moving only the push-button head 10. |
