An insertion tube, its manufacturing method, insertion part, and endoscope

By setting a first reinforcing layer and a second reinforcing layer inside the endoscope insertion tube, the problems of insertion resistance and control precision caused by elastic tube deformation are solved, and the morphological stability and control precision of the insertion part are achieved.

CN121621918BActive Publication Date: 2026-05-26HUNAN VATHIN MEDICAL INSTR CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUNAN VATHIN MEDICAL INSTR CO LTD
Filing Date
2026-02-04
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

The elastic tube of the existing endoscope insertion section is prone to irreversible deformation under its own weight and external forces, which leads to increased resistance and decreased control precision during insertion.

Method used

A first reinforcing layer and a second reinforcing layer are provided inside the insertion tube. The first reinforcing layer has a recessed portion, and the elastic tube is located between the recessed portion and the second reinforcing layer, forming a double limiting and covering support to ensure the stability and morphological stability of the elastic tube.

Benefits of technology

It effectively prevents the elastic tube from bending due to its own weight and external forces, ensures the morphological stability of the insertion tube in the cavity and the straightness of the traction rope, and improves the control response accuracy and insertion effect.

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    Figure CN121621918B_ABST
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Abstract

This application discloses an insertion tube, its manufacturing method, an insertion part, and an endoscope, relating to the field of medical device technology. The insertion tube includes an insertion body and an elastic tube. A first reinforcing layer and a second reinforcing layer are disposed within the insertion body, with the second reinforcing layer surrounding the first reinforcing layer. The first reinforcing layer has a recessed portion. The first and second reinforcing layers can form a dual limiting and covering support for the elastic tube. The concave shape of the recessed portion of the first reinforcing layer conforms to the outer contour of the elastic tube, and the outer enclosure constraint of the second reinforcing layer can significantly improve the installation stability of the elastic tube in the first channel. This effectively counteracts the bending moment generated by the elastic tube's own weight and external forces, preventing the elastic tube from bending due to its own weight and external forces. It also prevents the insertion tube from deforming due to the bending of the elastic tube, ensuring the morphological stability of the insertion tube during its advancement within the cavity, and ensuring the straightness of the traction rope transmission path and the precise transmission of control commands.
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Citation Information

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