| 摘要 |
PROBLEM TO BE SOLVED: To obtain a click mechanism of a rotation operation member with which a rotation operation member with a button switch is positioned at a given position of the direction of rotation in a simple structure without increasing the number of parts. SOLUTION: The click mechanism of the rotation operation member, structured by making use of a button switch fitted at the side of the rotation operation member, is composed of a rotation operation member and non-rotational fixture engaging with each other in free relative rotation at a cylindrical or conical rotation-engagement face, a plurality of click grooves formed in periphery direction with intervals facing the rotation-engagement face consisting of a concave face of the non-rotational fixture, a button switch supported to the rotation operation member so as to rotate together with it in its rotation direction and relatively move with it in the axis direction, and an elastic engagement leg formed on the button switch positioned inside the rotation-engagement face in free engagement and disengagement with the click grooves. |
