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    • 1. 发明授权
    • Flexible endoscope
    • 柔性内窥镜
    • US4947827A
    • 1990-08-14
    • US292473
    • 1988-12-30
    • Eric Opie, deceasedFred E. SilversteinDavid R. Kreft
    • Eric Opie, deceasedFred E. SilversteinDavid R. Kreft
    • G02B23/24A61B1/00A61B1/005
    • A61B1/00073A61B1/0052
    • Various methods and mechanical devices for providing manipulation and steering of the bending section of an endoscope having a sheath thereon is disclosed. In one embodiment, the longitudinal center axis of a biopsy type is aligned with the longitudinal center of the insertion tube, both being in common with the instantaneous bending center of the insertion tube. The insertion tube is capable of only right and left movement through steering but is also rotatable with respect to the handle to permit the tip to be positioned in any desired location. In an alternative embodiment, the instantaneous bending center is radially offset from the longitudinal center of the insertion tube. The hinges are positioned in the bending section of the insertion tube for locating the instantaneous center of bending at a desired location in a groove. Four, or in an alternative embodiment, three cables are provided for controlling the movement and steering of the bending section. Because the cables are not symmetrically located with respect to the instantaneous bending center, the mechanical control assembly is designed to take into account the difference between the movements of the respective cable through the full range of motions. In an alternative embodiment, the channel is located radially offset from the instantaneous center of bending and the biopsy tube assembly is made stretchable or compressible to ensure that the biopsy tube end remains aligned with the end of the insertion tube end.
    • 公开了用于提供具有护套的内窥镜的弯曲部分的操纵和转向的各种方法和机械装置。 在一个实施例中,活检类型的纵向中心轴线与插入管的纵向中心对准,两者都与插入管的瞬时弯曲中心相同。 插入管能够仅通过转向左右移动,但也可相对于手柄旋转,以允许尖端定位在任何期望的位置。 在替代实施例中,瞬时弯曲中心从插入管的纵向中心径向偏移。 铰链定位在插入管的弯曲部分中,用于将瞬时的弯曲中心定位在凹槽中的期望位置。 四个或替代实施例中,提供三根电缆以控制弯曲部分的移动和转向。 由于电缆相对于瞬时弯曲中心不对称地定位,所以机械控制组件被设计成考虑到各个电缆通过全部运动范围的运动之间的差异。 在替代实施例中,通道位于径向偏离瞬时弯曲中心的位置,活检管组件被制成可拉伸或可压缩,以确保活检管端部保持与插入管端部的端部对准。