| 摘要 |
<p>This invention has an object to provide an endoscope which efficiently and reliably obtains a stronger pulling force. To the end, the endoscope includes a drive section 12 which generates driving force for bending and driving a bending portion 2b, a C ring-shaped member 9 which is frictionally engageable with a pulley 11 and has a notch portion 9c at a portion of the ring-shaped member, an operation input member 5 which bends and operates the bending portion, an operation input-side pulling member 8a which is a first pulling member wound around the C ring-shaped member and extending from the C ring-shaped member toward the operation input member and is coupled to the operation input member such that a wrap distance, over which the operation input-side pulling member wraps around the C ring-shaped member across the notch portion from an extension position toward the operation input member of the C ring-shaped member, decreases with increase in the amount of operation of the operation input member, and a bending portion-side pulling member 8b which is a second pulling member wound around the C ring-shaped member and extending from the C ring-shaped member toward the bending portion and is coupled to the bending portion so as not to wrap around the C ring-shaped member across the notch portion from an extension position toward the bending portion on the C ring-shaped member.</p> |
