| 摘要 |
PROBLEM TO BE SOLVED: To provide a simple constitution capable of easily adjusting operation torque in operating a rotary knob for a rotary type operation mechanism suitably used for a camera control unit.SOLUTION: A rotary type operation mechanism is provided with an adjusting ring 120 which is provided with a projection part 107 projecting sideward at a part of a shaft 105 coupled to a knob 101, and rotates independently the shaft 105 to be displaceable along the axis of the shaft 105. The adjusting ring 120 has a surface opposed to the projection part 107 and an outer peripheral surface accepting a rotating action to vary the axial distance between the projection part 107 and a surface opposing thereto. A spring 130 is arranged between the projection part 107 and the surface opposing thereto, and the axial distance between the projection part 107 and the surface opposing thereto is varied through an action of the adjusting ring 120 so as to vary a deformation amount of the spring 130, and the load placed on the projection part 107 is thereby varied to adjust operation torque of the knob 101.SELECTED DRAWING: Figure 6 |
