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    • 3. 发明授权
    • Self-adjusting steering mechanism for borescope or endoscope
    • 内窥镜自适应转向机构
    • US4762119A
    • 1988-08-09
    • US78712
    • 1987-07-28
    • Jimmie B. Allred, IIIAllan I. Krauter
    • Jimmie B. Allred, IIIAllan I. Krauter
    • A61B1/005A61B1/00
    • A61B1/0055
    • In a cable-steerable endoscope or borescope, in which opposing cables are displaced to deflect the tip of the endoscope or borescope, a self-adjusting mechanism in the control section ensures a maximal differential force and a minimal total force is applied to the two steering cables. The self-adjusting mechanism has a frame that is affixed within the control section and a slider that is slidably disposed on the frame. First and second arms project outwardly from the slider and engage ends of the cable sheaths for the steering cables. The slider has a structure that engages the frame when there is no force on one steering cable to lock the slider against sliding motion, but which permits the slider to move proximally on the frame when there are forces applied on both steering cables. This arrangement, along with a reset spring, automatically takes up play or slack in the cable when it is not necessary, and also avoids simultaneous tensioning of the two cables which produces high steering forces that can damage the steering section.
    • 在电缆可操纵的内窥镜或内窥镜中,其中相对的电缆被移位以使内窥镜或内窥镜的尖端偏转,控制部分中的自调节机构确保最大的差分力,并且最小的总力施加到两个转向 电缆 自调节机构具有固定在控制部内的框架和可滑动地设置在框架上的滑块。 第一和第二臂从滑块向外突出并且接合用于转向电缆的电缆护套的端部。 当在一个转向电缆上没有力而使滑块抵抗滑动运动时,滑块具有接合框架的结构,但是当施加在两个转向电缆上的力时允许滑块在框架上向近侧移动。 这种布置与复位弹簧一起在不需要的时候自动地占用或松弛电缆,并且还避免了两个电缆的同时张紧,这产生可能损坏转向部分的高转向力。