| 摘要 |
<P>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. <P>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. <P>COPYRIGHT: (C)2012,JPO&INPIT |
