CN-224206806-U - Bending tube, insertion portion, and endoscope

CN224206806UCN 224206806 UCN224206806 UCN 224206806UCN-224206806-U

Abstract

The application discloses a bending tube, an inserting part and an endoscope, and relates to the technical field of medical instruments. The bending tube disclosed by the application is used for an endoscope. The bending tube comprises a plurality of tube segment units which are axially distributed along the bending tube, the tube segment units are rotationally connected to realize bending action of the bending tube, the bending tube is provided with a guide channel which is arranged on the side wall of the bending tube and used for guiding and penetrating the traction rope, the bending tube is provided with a first positioning part which is arranged at the far end of the bending tube and is positioned on an extending path of the guide channel, and the first positioning part is used for pre-positioning the traction rope when one side of the far end of the bending tube is straightened, so that the far end part of the traction rope is distributed along the extending path of the guide channel. The scheme at least can be used for solving the problem that the connection reliability of the distal end of the hauling rope and the bending tube is insufficient.

Inventors

TANG PENG
JIANG ZHENDONG
LI XIANG

Assignees

湖南省华芯医疗器械有限公司

Dates

Publication Date: 20260508
Application Date: 20250526

Claims (10)

1. A bending tube for an endoscope, characterized in that the bending tube comprises a plurality of tube segment units arranged along the axial direction thereof, and the tube segment units are rotationally connected to realize the bending action of the bending tube; The bending tube is provided with a guide channel arranged on the side wall of the bending tube, the guide channel is used for guiding and penetrating the traction rope, the bending tube is provided with a first positioning part arranged at the distal end of the bending tube, the first positioning part is positioned on the extending path of the guide channel, and the first positioning part is used for pre-positioning the traction rope when one side of the distal end of the bending tube straightens the traction rope so that the distal end part of the traction rope is distributed along the extending path of the guide channel.
2. The bending tube of claim 1, wherein the first positioning portion penetrates a sidewall of the bending tube to pre-position the pulling rope when the pulling rope is tensioned inside and outside the bending tube by passing through the pulling rope; Or the first positioning part is a first positioning bulge, and the first positioning bulge is used for winding the traction rope so as to pre-position the distal end part of the traction rope.
3. The bending tube of claim 2, wherein the first locating portion is a first locating notch through a side wall of the bending tube, the first locating notch being provided in a distal end face of the bending tube, or the first locating portion is a first locating hole through a side wall of the bending tube.
4. A bending tube according to claim 2 or claim 3, wherein the bending tube is positionally assembled with the front end housing of the insertion portion of the endoscope by the first positioning portion.
5. The bending tube of claim 4, wherein the first positioning projection is provided on a distal end face of the bending tube and is provided to protrude in an axial direction of the bending tube.
6. An insert comprising the curved tube of any one of claims 1 to 5.
7. The insertion portion according to claim 6, wherein the traction rope extends into the first positioning portion with the first positioning portion penetrating the side wall of the bent tube, and is welded to the bent tube in the first positioning portion to form an auxiliary welding point.
8. The insert of claim 7, wherein the traction rope is broken at its auxiliary weld.
9. The insertion part according to claim 7 or 8, wherein the bending tube further comprises an avoidance notch provided at a distal end thereof, and a distal end portion of the instrument tube of the insertion part is bent and extended into the avoidance notch, the avoidance notch is provided corresponding to one of the first positioning notches in an axial direction of the insertion part, and the first positioning notch is located in the avoidance notch; Or the bending tube further comprises a second positioning notch arranged at the far end of the bending tube, the second positioning notch is arranged corresponding to the first positioning notch in the axial direction of the insertion part, the first positioning notch is positioned in the second positioning notch, the insertion part comprises a front end shell arranged at the far end of the bending tube, a second positioning protrusion is arranged on the side wall of the front end shell, and the second positioning protrusion is clamped with the second positioning notch to realize limit fit in the circumferential direction.
10. An endoscope comprising the insertion portion according to any one of claims 6 to 9.

Description

Bending tube, insertion portion, and endoscope Technical Field The application relates to the technical field of medical instruments, in particular to a bending tube, an inserting part and an endoscope. Background With the continuous development of medical technology, endoscopes are widely used in the diagnosis and treatment process of diseases. When using an endoscope, it is necessary to send the insertion portion of the endoscope into a patient, and to pull the distal end portion of the insertion portion by a pulling rope to bend the active bending section, thereby adjusting the orientation of the distal end of the insertion portion to obtain image information of a target site (for example, a lesion). In the related art, the distal end of the pull cord is typically fixed to the side wall of the distal end of the bending tube in the active bending section by welding, in order to desirably improve the connection reliability of the two. However, in practice, with the above-mentioned related-art endoscope, the distal end of the pulling cord is still often loosened or even detached, and it is seen that the reliability of its fitting on the curved tube is still insufficient. Disclosure of utility model The application provides a bending tube, an insertion part and an endoscope, which can be used for at least solving the problem of insufficient connection reliability between the distal end of a hauling cable and the bending tube. In a first aspect, embodiments of the present application provide a bending tube for an endoscope. The bending tube comprises a plurality of tube segment units which are axially distributed along the bending tube, and the tube segment units are rotationally connected with each other so as to realize the bending action of the bending tube. The bending tube is provided with a guide channel arranged on the side wall of the bending tube and used for guiding the traction rope to pass through, and the bending tube is provided with a first positioning part arranged at the distal end of the bending tube and positioned on the extending path of the guide channel, wherein the first positioning part is used for pre-positioning the traction rope when the traction rope is straightened at one side of the distal end of the bending tube so as to enable the distal end part of the traction rope to be distributed along the extending path of the guide channel. In some embodiments, the first positioning portion penetrates the sidewall of the curved tube to pre-position the pull-cord as it is passed through the pull-cord to tension the pull-cord on the inside and outside of the curved tube. In some embodiments, the first positioning portion is a first positioning protrusion for winding the pull-cord to pre-position a distal portion of the pull-cord. In some embodiments, the first locating portion is a first locating notch through a side wall of the curved tube, the first locating notch being provided in a distal end face of the curved tube. In some embodiments, the first locating portion is a first locating hole through a sidewall of the curved tube. In some embodiments, the bending tube is positionally assembled with the front end housing of the insertion portion of the endoscope by a first positioning portion. In some embodiments, the first positioning protrusion is provided on a distal end face of the bending tube and is provided protruding in an axial direction of the bending tube. In a second aspect, embodiments of the present application provide an insert comprising a curved tube according to the first aspect of the present application. In some embodiments, the pull rope extends into the first locating portion with the first locating portion penetrating the side wall of the curved tube and is welded to the curved tube within the first locating portion to form the auxiliary welding point. In some embodiments, the traction rope is broken at its auxiliary weld. In some embodiments, the bending tube further comprises an avoidance notch arranged at the distal end of the bending tube, the distal end portion of the instrument tube of the insertion portion is bent and extends into the avoidance notch, the avoidance notch is arranged corresponding to one first positioning notch in the axial direction of the insertion portion, and the first positioning notch is located in the avoidance notch. In some embodiments, the bending tube further comprises a second positioning notch arranged at the distal end of the bending tube, the second positioning notch is arranged corresponding to the first positioning notch in the axial direction of the insertion part, the first positioning notch is positioned in the second positioning notch, the insertion part comprises a front end shell arranged at the distal end of the bending tube, a second positioning protrusion is arranged on the side wall of the front end shell, and the second positioning protrusion is clamped with the second positioning notch to realize limit fit in the cir