PROBLEM TO BE SOLVED: To provide a device for a curving operation of body cavity insertion tubing, which enables traction operation of a curving operation wire for remote-controlled bending of a curving part by a small operation force and which can be so constituted as to have excellent operability and a simple and lightweight structure.SOLUTION: Leaf springs 25U and 25D for biasing a drum driving cylinder 23 in the direction of pulling the curving operation wires 6U and 6D are formed in an R shape curved in a curvature radius smaller than that of the outer peripheral surface of the drum driving cylinder 23 when no load is applied, and the springs are disposed in a state of being elastically deformed to be along the outer peripheral surface of the drum driving cylinder 23 and charged with a spring force (restoring force). When the drum driving cylinder 23 rotates in the direction of the curving operation wires 6U and 6D being pulled, the leaf springs 25U and 25D return gradually to the original shape, while entering notch parts 24U and 24D of the drum driving cylinder 23, and assist the rotation of the drum driving cylinder 23 by the spring force (restoring force) thereof.COPYRIGHT: (C)2012,JPO&INPIT【課題】湾曲部を遠隔操作で屈曲させるための湾曲操作ワイヤの牽引操作を、小さな操作力量で行うことができて、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湾曲操作装置を提供すること。【解決手段】湾曲操作ワイヤ6U,6Dを牽引する方向にドラム駆動筒23を付勢するための板ばね25U,25Dは、無負荷の状態ではドラム駆動筒23の外周面の曲率半径より小さな曲率半径でカーブしたアール形状に形成されて、ドラム駆動筒23の外周面に沿う状態に弾性変形させられてばね力(復元力)がチャージされた状態に配置され、湾曲操作ワイヤ6U,6Dが牽引される方向にドラム駆動筒23が回転すると、板ばね25U,25Dが、ドラム駆動筒23の切り欠き部24U,24D内に入りながら次第に元の形状に戻ってそのばね力(復元力)でドラム駆動筒23の回転をアシストする。【選択図】 図1
