Bending portion for disposable endoscope

Abstract

The invention provides a bending portion for a disposable endoscope. The bending portion is formed by sequential end-to-end connection of a plurality of elastic pull-line positioning rings and is in abendable snake-bone structure. Two opposite side walls of each elastic pull-line positioning ring are internally provided with pull-line penetrating holes which penetrate head and tail ends of the side walls. The pull-line penetrating holes of the elastic pull-line positioning rings are sequentially and penetratingly connected to form pull-line passages in two side walls of the snake-bone structure. Positions, with the pull-line penetrating holes, at end-to-end abutting edges of every two adjacent elastic pull-line positioning rings are provided with notches as reserved bending gaps. The bending portion made of a plastic material is high in elasticity, operability, stability and safety.

Description

technical field [0001] The invention relates to the field of medical equipment, in particular to a bending part for a disposable endoscope. Background technique [0002] With the development of medicine, endoscopic surgery has been increasingly used clinically in recent years. The endoscope snake bone is one of the important parts of the endoscope. It is located at the front end of the endoscope to form a bending part, which is convenient for the lens to change direction in the human body. The existing bending part is made of metal, which is made by sequential riveting or welding of a plurality of metal stay wire positioning rings. The outer wall of each stay wire positioning ring is provided with depressions, and the stay wires pass through these depressions in sequence. Since the wire positioning ring is made of metal, its flexibility is not enough, and it is easy to produce sharp and hard folds, so that the wire cannot be pulled smoothly. Once one of the wire positioning...

AI Technical Summary

Problems solved by technology

Since the wire positioning ring is made of metal, its flexibility is not enough, and it is easy to produce sharp and hard folds, so that the wire cannot be pulled smoothly. Once one of the wire positioning rings is damaged, the wire cannot be pulled. mirror must be replaced

On the other hand, since the metal stay wire positioning rings are composed of riveting or welding, the processing technology is complex and prone to defects. Moreover, once the riveting points or welding points are detached or desoldered during use, the rigidity of the metal material , it is easy to cause the entire bending part to fail, the cable cannot be pulled, and the endoscope cannot be rotated, causing inconvenience to the operator and unnecessary pain to the patient

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