| 摘要 |
An endoscope comprises: an operation portion provided on a proximal end side of an insertion portion; pulling members that extend from the bending pieces included in the bending portion; a pulley rotated by a motor provided in the operation portion in a pulling direction in which any of the pulling members is pulled; rotating bodies which are elastically deformable and arranged in a loose-fit state on the pulley and on which the respective pulling members are wound; a manipulator that is provided so as to project from the operation portion and capable of being subjected to a tilting operation; a suspension frame that is provided at the shaft portion of the manipulator and includes attachment portions to which the pulling members guided into the operation portion are fixed at positions facing each other across the manipulator; and a force amount adjustment section that adjusts an amount of force of pulling a part of a pulling member on the insertion portion side relative to the pulley by changing a frictional resistance generated as a result of, upon an operation to tilt the manipulator being performed, the pulling member being pulled to reduce a diameter of the rotating body and an inner surface of the rotating body being thereby brought into contact with an outer circumferential face of the pulley. |
