| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a setting dial and an image formation apparatus in which the cost is reduced.SOLUTION: A setting dial includes a push button switch 53 including a push button 531 biased in the projecting direction and detecting on/off of the push button 531, an operation member 51 having a peripheral surface 511 surrounding the rotation center line L and an end face 512 penetrated by the rotation center line L, where an operation part 511a for receiving rotary operation by a user is formed on the peripheral surface 511, irregularities are formed on the end face 512 to act on the push button 531, and an arm member 52 extending between the push button 531 of the push button switch 53 and the end face 512 of the operation member 51, and turning the push button 531 on/off depending on the change of irregularities of the end face 512 due to rotary operation of the operation member 51.</p> |
