ROTATIONAL MOVEMENT SUPPORTING MECHANISM

摘要

PROBLEM TO BE SOLVED: To diminish sounds produced at the time of click by forming a rotational movement supporting mechanism as a click mechanism part into a structure utilizing the frictional resistance of the mutual elastic bodies. SOLUTION: A click mechanism part 4 comprises an elastic body 41 and a roller member 42 which can be brought into slide contact with on the inner surface of the elastic body 41. The elastic body 41 has wall parts 41a, 41b opposed to each other in a width direction. A thick part thicker than the other part is provided in an appropriate position in the circumference direction of one wall part 41a. The elastic body 41 is loaded between a main body case 2 and a rotary shaft 3 by being engaged with the main body case 2. The roller member 42 is loaded between the rotary shaft 3 and the elastic body 41. When the position of the roller member 42 is brought to a position opposed to the thick part, the wall parts 41a, 41b contact with each other so that the rotary shaft 3 is clicked.