| 摘要 |
PROBLEM TO BE SOLVED: To provide an endoscope in which a big curvature angle is obtained and the curvature angle is not lowered even when repeatedly used in the endoscope having a curvature part to be driven by fluid pressure. SOLUTION: In the endoscope having the curvature part to be driven by the fluid pressure, a member having a bellows structure is used as an inner diameter regulation member of the center lumen of a multi-lumen tube constituting the curvature part. COPYRIGHT: (C)2009,JPO&INPIT
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