| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a lock type rotation operation dial with a lock function added, which improves operability such that switching between a lock state and a lock release state is easily performed, keeps a proper height for a user, and reduce the number of components to reduce costs.SOLUTION: An operation device includes: a rotatable rotation operation dial having a plurality of stop phases; a lock member locking the rotation operation dial at a predetermined stop position; a lock button operating the lock member; an alternate mechanism holding a lock state even in a case of removing pressing force, and restored to a lock release state even in a case of pressing again; and a body case upper surface provided with a hole into which the lock member is inserted in locking.</p> |
