| 摘要 |
PROBLEM TO BE SOLVED: To temporarily fix a rotation handle at a desired rotating operation position in a simple configuration.SOLUTION: A fixing mechanism comprises: a flexible member that includes a substantially disk-shaped pressing member rotating separately from a rotation handle, and a flexible piece with which at least a part of a peripheral wall surface of the pressing member comes into contact, and the base end of which is fixed to the handle base part so as to surround the pressure member; and a holding member that has a substantially cylindrical wall part so as to surround the flexible piece and, the base end of which is fixed to the rotation handle. At least any one of the part of peripheral surface of the pressing member coming into contact with the flexible piece, and a part of the internal wall surface the flexible member coming into contact with the pressing part is so formed that a distance from the rotation axis thereof is gradually shortened towards the rotating operation direction of the rotation handle. When the pressing member rotatingly operated in a same direction as the rotating operation direction of the rotation handle comes into contact with the flexible member, the fixing mechanism presses the flexible member and bends it outward to bring the flexible member into pressure contact with the wall part of the holding member, thereby temporarily inhibiting the movement of the operation handle. |
