| 摘要 |
PROBLEM TO BE SOLVED: To enable first and second operation pieces closely disposed in juxtaposition with each other to be operated without error. SOLUTION: In an assembly of a first operating piece 22, a second operating piece 23 closely disposed in juxtaposition with the first operating piece 22 and a contact mechanism operating in connection with the first and second operating pieces 22, 23, the first operating piece 22 and the second operating piece 23 are disposed so as to be operated in the opposite direction to each other (arrows C, D). Even if the second operating piece 23 is touched by mistake when operating the first operating piece 22, operation of the second operating piece 23 can be avoided. Likewise, even if the first operator 22 is touched by mistake when operating the second operating piece 23, operation of the first operating 22 can be avoided. |
