CN-116407071-B - Endoscope insertion tube and endoscope

CN116407071BCN 116407071 BCN116407071 BCN 116407071BCN-116407071-B

Abstract

The invention relates to the technical field of endoscopes, and provides an endoscope insertion tube and an endoscope. The endoscope insertion tube comprises an insertion part, wherein the insertion part is provided with a main body section and a bending section which are formed along the axial direction, the insertion part comprises an inner core, the inner core is provided with a multi-cavity channel which is formed along the axial direction, the multi-cavity channel comprises a working cavity channel, a water-air cavity channel and a plurality of functional cavity channels, the inner core consists of an inner core main body part and an inner core extending part, the inner core main body part is positioned in the main body section, the inner core extending part is positioned in the bending section, the end surface cross section of the inner core extending part is contained in the end surface cross section of the inner core main body part, the end surface cross section area of the inner core extending part is smaller than the end surface cross section area of the inner core main body part, and the inner core extending part only comprises the working cavity channel and the water-air cavity channel.

Inventors

XIE TIANYU
Ji Yuantong
WANG YANTAO
YANG JUN

Assignees

北京大学
上海澳华内镜股份有限公司

Dates

Publication Date: 20260508
Application Date: 20211231

Claims (7)

1. An endoscope insertion tube, comprising: An insertion portion having a main body section and a curved section formed in an axial direction; The insertion part comprises an inner core, wherein the inner core is provided with a plurality of cavities formed along the axial direction, and the cavities comprise a working cavity, a water gas cavity and a plurality of functional cavities; The inner core consists of an inner core main body part and an inner core extension part, wherein the inner core main body part is axially positioned on the main body section, the inner core extension part is axially positioned on the bending section, and the inner core main body part and the inner core extension part are integrally formed; the end surface section of the inner core extension part is contained in the end surface section of the inner core main body part, and the end surface section area of the inner core extension part is smaller than the end surface section area of the inner core main body part; The working channel and the water gas channel completely penetrate through the inner core main body part and the inner core extension part along the axial direction, the plurality of functional channels completely penetrate through the inner core main body part along the axial direction, the inner core extension part is only provided with a working cavity channel and a water vapor cavity channel, and the working cavity channel and the water vapor cavity channel at the position of the inner core extension part are formed by extending the working cavity channel and the water vapor cavity channel at the position of the inner core main body part to a bending section; The bending section comprises a snake bone component, a snake bone protection leather and a head end part, wherein the snake bone protection leather is sleeved outside the snake bone component, one end of the snake bone component is connected with the main body section, the other end of the snake bone component is connected with the head end part, the head end part is at least provided with a working opening and a water air opening, the working cavity is communicated with the working opening, the water air cavity is communicated with the water air opening, and the inner core extension part is arranged in the snake bone component; the functional channels comprise cable channels, imaging unit cables are arranged in the cable channels in a penetrating mode, the head end portion is further provided with a camera unit and an illumination unit, and the imaging unit cables penetrate through the snake bone assembly and are connected with the camera unit and the illumination unit; The multifunctional cavity comprises a plurality of haulage rope cavities, haulage ropes are arranged in the haulage rope cavities, and pass through the snake bone component and are connected with the end part of the snake bone component, which is far away from the main body section.
2. The endoscope insertion tube of claim 1, wherein the plurality of functional channels comprises an air channel, the air channel is arranged with the water air channel in a common wall, a water air through hole is arranged between the air channel and the water air channel, the water air through hole is communicated with the water air channel and the air channel, the air channel is provided with an opening facing the bending section, and a plug piece is arranged at the opening of the air channel.
3. The endoscope insertion tube of claim 1, wherein the outer wall of the inner core body portion is provided with a plurality of accommodating gaps, the plurality of accommodating gaps are in one-to-one correspondence with the plurality of hauling cable channels, and the accommodating gaps are communicated with the hauling cable channels.
4. An endoscope insertion tube according to any of claims 1 to 3 and wherein said working channel, said water gas channel and said plurality of functional channels are profiled in cross section, said water gas channel and said plurality of functional channels being circumferentially disposed along an inner wall of said insertion portion, said working channel having a larger cross-sectional area than said water gas channel and said plurality of functional channels.
5. An endoscope insertion tube as in any of claims 1-3 wherein a removable divider is provided within the working channel, the divider extending along one end of the insertion portion to the other end to divide the working channel into a plurality of regions.
6. An endoscope insertion tube as in any of claims 1-3 wherein the body section further comprises a metal braid and a soft gel layer, the metal braid being wrapped around the inner core body portion and the soft gel layer being wrapped around the metal braid.
7. An endoscope comprising an operation portion and the endoscope insertion tube according to any one of claims 1 to 6; The operation part is connected with one end of the insertion part far away from the bending section so as to drive the insertion part to rotate and bend the bending section.

Description

Endoscope insertion tube and endoscope Technical Field The invention relates to the technical field of endoscopes, in particular to an endoscope insertion tube and an endoscope. Background An endoscope is a medical instrument which can enter a human body through a natural duct of the human body or through a small incision made by an operation so as to peep for the change of a relevant part, or can correspondingly treat the peeping part through a working channel. In the prior art, besides a working channel, an illumination light window, a water vapor nozzle, a water delivery air channel, a lens, a haulage rope channel and other non-clamp channel functional devices are further arranged on the endoscope, a plurality of endoscopes are selectively provided with a multi-cavity tube in an insertion part for isolating each functional device, cavities such as an illumination cavity, a camera lens cavity, a water delivery air channel, a water suction cavity and an instrument cavity catheter are arranged in the multi-cavity tube, two ends of the cavities are communicated with each other, so that each functional device is accommodated, and a bending assembly is sleeved on the periphery of the multi-cavity inner catheter for facilitating bending of the insertion part. When the endoscope works, the bending part can be bent and deformed to a large extent, and when the bending part of the multi-cavity endoscope is bent, the cavity formed between the inner cavity and the bending assembly is insufficient due to the fact that the cavity is insufficient in redundant space, the risk that the cavity is mutually extruded and deformed and even collapses is caused, the cross section area of the cavity is greatly reduced, and the performance is greatly reduced. Disclosure of Invention The invention provides an endoscope insertion tube and an endoscope, which are used for solving the defect that the bending part of a multi-cavity tube endoscope in the prior art can cause extrusion deformation of various cavities and even collapse of the cavities, and realizing the purpose of ensuring the usability of various functional devices of the endoscope. The present invention provides an endoscope insertion tube, comprising: An insertion portion having a main body section and a curved section formed in an axial direction; The insertion part comprises an inner core, wherein the inner core is provided with a plurality of cavities formed along the axial direction, and the cavities comprise a working cavity, a water gas cavity and a plurality of functional cavities; The inner core consists of an inner core main body part and an inner core extension part, wherein the inner core main body part is axially positioned on the main body section, the inner core extension part is axially positioned on the bending section, and the inner core main body part and the inner core extension part are integrally formed; the end surface section of the inner core extension part is contained in the end surface section of the inner core main body part, and the end surface section area of the inner core extension part is smaller than the end surface section area of the inner core main body part; The working channel and the water gas channel completely penetrate through the inner core main body part and the inner core extension part along the axial direction, the plurality of functional channels completely penetrate through the inner core main body part along the axial direction, the inner core extension part is only provided with a working cavity channel and a water vapor cavity channel, and the working cavity channel and the water vapor cavity channel at the position of the inner core extension part are formed by extending the working cavity channel and the water vapor cavity channel at the position of the inner core main body part to the bending section. According to the endoscope insertion tube provided by the invention, the functional channels comprise the air channel, the air channel and the water air channel are arranged in a common wall, a water-air through hole is arranged between the air channel and the water air channel, the water-air through hole is communicated with the water air channel and the air channel, the air channel is provided with an opening facing the bending section, and a plug member is arranged at the opening of the air channel. According to the endoscope insertion tube provided by the invention, the bending section comprises the snake bone component, the snake bone protecting leather and the head end part, the snake bone protecting leather is sleeved outside the snake bone component, one end of the snake bone component is connected with the main body section, the other end of the snake bone component is connected with the head end part, the head end part is at least provided with a working opening and a water air opening, the working cavity is communicated with the working opening, the water air cavity is communicated with the water air openin