PROBLEM TO BE SOLVED: To provide a bending shape holding operation device of intracavital insertion tubes, which can perform a traction operation for pulling a pair of operation wires to maintain a bending shape of a flexible section at the same time with a small operation force, is moreover user-friendly, has a simple structure, and can be composed to be lightweight.SOLUTION: The bending shape holding operation device of intracavital insertion tubes is provided with: pulleys 7 on which rear end parts of the pair of operation wires 5 are wound, the operation wires being drawn out toward a flexible tube 1 a pulley support member 10 which supports the pulleys 7 rotatably, and is installed slidably in a roughly parallel direction to the drawing direction of the pair of operation wires 5 and a leaf spring 15 which biases the pulley support member 10 in an opposite direction to the drawing direction of the pair of operation wires 5.COPYRIGHT: (C)2012,JPO&INPIT【課題】屈曲自在部の屈曲形状を保持するために対をなす操作ワイヤを同時に牽引操作する操作を、小さな操作力量で行うことができ、しかも操作性がよく、構造がシンプルで軽量に構成することができる体腔内挿入管類の屈曲形状保持操作装置を提供すること。【解決手段】対をなす操作ワイヤ5の後端側の部分が巻回されて可撓管部1の方に向かって引き出されたプーリ7と、プーリ7を回転自在に支持して対をなす操作ワイヤ5の引き出し方向と略平行方向にスライド自在に設けられたプーリ支持部材10と、プーリ支持部材10を対をなす操作ワイヤ5の引き出し方向と反対方向に付勢するための板バネ15とが設けられている。【選択図】 図1
