CN117503025A

CN117503025A - Insertion tube and endoscope

Info

Publication number: CN117503025A
Application number: CN202311626343.4A
Authority: CN
Inventors: 张磊; 印帅
Original assignee: Medcaptain Medical Technology Co Ltd
Current assignee: Medcaptain Medical Technology Co Ltd
Priority date: 2023-11-29
Filing date: 2023-11-29
Publication date: 2024-02-06

Abstract

The application provides an insertion tube and endoscope, the insertion tube includes snake bone, flexible pipe and butt joint pipe, and the snake bone includes main part and installation department, and the main part includes a plurality of bone segments of swing joint each other, and the installation department is installed in the main part one end along extending direction, and the outside of installation department and the outside of partial flexible pipe are located to the butt joint pipe cover, and with the equal fixed connection of installation department and flexible pipe. When the joint of the snake bone and the flexible pipe is worn and broken, the insertion pipe only needs to be replaced by the butt joint pipe, and the replacement is convenient.

Description

Insertion tube and endoscope

Technical Field

The present application relates to the field of endoscope technology, and in particular, to an insertion tube and an endoscope.

Background

At present, a snake bone is generally arranged in an endoscope and connected with a flexible tube, and the adjustment of a lens in the endoscope is realized by controlling the bending deformation of the snake bone. And the snake bones and the flexible pipe are easy to wear and break at the joint in the bending process. At present, the flexible pipe and the snake bone are directly and fixedly connected in a common mode of welding and the like, and when the snake bone and the flexible pipe are worn and broken at the connecting part, the flexible pipe and the snake bone need to be integrally replaced, and the replacement is troublesome.

Disclosure of Invention

The purpose of this application embodiment is to provide a pegboard and endoscope, and this pegboard takes place when wearing and tearing fracture in the junction of snake bone and flexible pipe, only need change the butt joint pipe can, it is more convenient to change.

The embodiment of the application provides an insert tube, insert tube include snake bone, flexible pipe and to take over, and snake bone includes main part and installation department, and the main part includes a plurality of bone segments of swing joint each other, and installation department installs in the main part one end along extending direction to take over and the equal fixed connection of installation department and flexible pipe.

In the insertion tube provided by the embodiment of the application, the connection part of the flexible tube and the snake bone is fixedly connected through the butt joint tube. In the process of bending the insertion tube, the snake bone and the flexible tube are not directly fixedly connected, so that the snake bone and the flexible tube are not worn against each other during bending, but are worn against the butt joint tube, and therefore, when the insertion tube is worn and broken, only the butt joint tube needs to be replaced, and the problem that the whole replacement is needed when the existing snake bone and the flexible tube are directly fixedly connected is solved.

In one possible embodiment, the docking tube is sleeved outside the mounting portion and outside a portion of the flexible tube. The installation department and the flexible pipe are not directly fixedly connected, and the size of the butt joint department of the installation department and the flexible pipe can not be suddenly changed, so that the working pipe installed on the inner side of the flexible pipe can be naturally transited to the inner side of the snake bone, the working pipe can not be deformed or twisted, the smoothness of the inside of the working pipe is ensured, and tools such as instruments and the like are further ensured to work in the working pipe without being influenced.

In one possible embodiment, the flexible tube includes a first portion and a second portion connected to the first portion, the first portion is disposed opposite to the mounting portion, the docking tube is sleeved outside the first portion, and the docking tube is fixedly connected to the first portion, and an outer diameter of the first portion is smaller than an outer diameter of the second portion, so that when the docking tube is sleeved outside the first portion, an outer diameter of the docking tube is comparable to an outer diameter of the second portion, so that an outer diameter of the insertion tube is uniform and consistent, and an appearance effect of the insertion tube is improved.

In a possible implementation mode, the butt joint pipe is sleeved on the outer side of the installation part, the outer diameter of the installation part is smaller than that of the main body, on the one hand, after the butt joint pipe is sleeved on the outer side of the installation part, the outer diameter of the butt joint pipe can be equal to the outer diameter of the main body in size, and the outer diameter of the insertion pipe is uniform and consistent in size and good in appearance effect. On the other hand, the inner side of the installation part is not influenced and is communicated with the inner side of the main body smoothly, so that the smoothness of the inside of the working tube is ensured.

In one possible implementation manner, the snake bone is provided with a first rib, the first rib is convexly arranged on the peripheral surface of the mounting part, and is in butt joint Guan Baofu with the first rib and in interference fit with the first rib, so that the firmness of connection between the butt joint pipe and the snake bone can be improved; and/or, the flexible Guan Sheyou second ribs are arranged on the peripheral surface of the flexible pipe in a protruding mode, and the butt joint pipe is coated with the second ribs and in interference fit with the second ribs. The snake bone is equipped with first rib, and first rib is protruding to be located the global of installation department, dock Guan Baofu first rib, and with first rib interference fit to promote the firmness of being connected between butt joint pipe and the flexible pipe.

In one possible embodiment, the material of the docking tube comprises a metal or a nonmetal.

In one possible embodiment, the wall thickness of the butt joint pipe is D,0.05 cm.ltoreq.D.ltoreq.1 cm.

In one possible embodiment, the docking tube is sleeved outside the mounting portion and outside a portion of the flexible tube, and the insertion tube further includes a first adhesive member;

the first bonding piece is connected between the inner side of the butt joint pipe and the peripheral surface of the mounting part; and/or the first bonding piece is connected between the inner side of the butt joint pipe and the peripheral surface of the flexible pipe.

In one possible embodiment, the mounting portion is provided with a first groove, an opening of the first groove is formed in a peripheral surface of the mounting portion, the butt joint pipe covers the opening of the first groove, and the first adhesive member is arranged in the first groove and is fixedly connected between a groove wall of the first groove and an inner side of the butt joint pipe. The material that can hold first bonding piece in the first recess utilizes first bonding piece to bond between the cell wall of first recess and the inboard of butt joint pipe, can promote the connection fastness between butt joint pipe and the snake bone.

In one possible embodiment, the plurality of first grooves are provided, and the opening of each first groove is disposed around the circumferential surface of the mounting portion, and the plurality of first grooves are disposed at intervals along the extending direction of the mounting portion.

In one possible embodiment, the plurality of first grooves are provided at intervals along the circumferential surface of the mounting portion.

In one possible embodiment, the first recess extends through the mounting portion in the direction of the wall thickness of the mounting portion.

In one possible embodiment, the flexible member Guan Sheyou is a second groove, an opening of the second groove is formed in a peripheral surface of the flexible tube, the butt joint tube covers the opening of the second groove, and the first adhesive member is disposed in the second groove and is fixedly connected between a groove wall of the second groove and an inner side of the butt joint tube. The material of the first bonding part can be accommodated in the second groove, and the first bonding part is bonded between the groove wall of the second groove and the inner side of the butt joint pipe, so that the connection firmness between the butt joint pipe and the flexible pipe can be improved.

In one possible embodiment, the butt joint pipe is provided with an opening penetrating the butt joint pipe in the wall thickness direction of the butt joint pipe, the first adhesive member includes a first adhesive portion fixedly connected to the peripheral surface of the mounting portion and the peripheral surface of the flexible pipe, and a second adhesive portion fixedly connected to the first adhesive portion and connected to the wall of the opening. Through set up the trompil at the butt joint pipe to make second bonding portion and first bonding portion form the back-off structure, can prevent that the butt joint pipe from moving along extending direction relative snake bone, promoted the connection fastness of first bonding piece and flexible pipe and snake bone.

In one possible embodiment, the insertion tube is provided with a boss which abuts against an end face of the docking tube; the boss is convexly arranged on the peripheral surface of the mounting part and extends along the circumferential direction of the mounting part; and/or the boss is convexly arranged on the peripheral surface of the flexible pipe and extends along the circumferential direction of the flexible pipe. Through setting up the boss at the inserted tube, utilize the boss to support with the terminal surface of butt joint pipe to the position that the butt joint pipe sleeve was located on the installation department of snake bone, guaranteed the product uniformity of a plurality of inserted tubes on the one hand, on the other hand avoided the flexible pipe sleeve to locate the inboard part of butt joint pipe and be unlikely to too much, ensured the connection fastness of inserted tube.

In one possible embodiment, the boss includes a second mating face facing the docking tube and mating with an end face of the docking tube.

In one possible embodiment, the insertion tube further includes a second adhesive member connected between the second mating surface and an end surface of the butt joint tube to further enhance the connection between the butt joint tube and the installation portion of the snake bone.

In one possible embodiment, the mounting portion abuts against an end face of the flexible pipe, and the mounting portion includes a first mating face that faces the flexible pipe and is in concave-convex engagement with the end face of the flexible pipe.

In one possible implementation manner, each bone segment is provided with a traction wire hole, the traction wire holes penetrate through the bone segments along the axial direction of the bone segments, the traction wire holes of the bone segments are communicated to form a channel, the channel is used for accommodating traction wires, at least one bone segment in the bone segments is provided with a first slot and a second slot, the first slot opening and the second slot opening are respectively arranged on two surfaces of the bone segments, which are arranged opposite to each other along the axial direction, the first slot and the second slot opening penetrate through the peripheral surface of the bone segments, and the first slot opening and the second slot opening are communicated along the axial direction of the bone segments to form the traction wire holes.

In one possible embodiment, the body comprises at least two segments of body portions, each segment of body portion comprising a plurality of condyles.

The embodiment of the application also provides an endoscope, including head, camera lens, cable, work pipe, traction wire and as foretell insert tube, the head is installed in the main part along extending direction and deviate from the one end of installation department, and the camera lens is installed in the head, and the cable is connected with the camera lens electricity, traction wire and snake bone fixed connection, work pipe, cable and traction wire all accept in the inboard of insert tube.

In one possible embodiment, the main body comprises at least two sections of main body parts, the at least two sections of main body parts are connected with each other, each section of main body part comprises a plurality of bone segments, each bone segment is provided with a first through hole, a second through hole and a third through hole, and the first through hole, the second through hole and the third through hole penetrate through the bone segments along the axial direction of the bone segments and are arranged at intervals; in the at least two sections of the main body part, the first through holes of the bone segments are communicated to form a first channel, the second through holes of the bone segments are communicated to form a second channel, and the third through holes of the bone segments are communicated to form a third channel; the mounting part is communicated with the first channel, the second channel and the third channel and is communicated with the inner side of the flexible pipe; the working tube is accommodated in the first channel, the cable is accommodated in the second channel, and the traction wire is accommodated in the third channel.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an endoscope according to a first embodiment of the present application;

FIG. 2 is an exploded view of the endoscope of FIG. 1;

FIG. 3 is a schematic view of the structure of an insertion tube in the endoscope shown in FIG. 2;

FIG. 4 is an exploded view of the insertion tube of FIG. 3;

FIG. 5 is a schematic view of a snake bone in the insertion tube of FIG. 4;

FIG. 6 is a schematic view of the snake bone of FIG. 5 from another perspective;

FIG. 7 is an exploded view of the snake bone of FIG. 5;

FIG. 8 is an exploded view of the snake bone of FIG. 5 at another view angle;

FIG. 9 is a schematic cross-sectional view of a portion of a condyle of the main body of the snake bone of FIG. 5;

FIG. 10 is a schematic cross-sectional view of the snake bone of FIG. 5;

FIG. 11 is a schematic view of a portion of the bone segments and connecting portions of the snake bone of FIG. 5;

FIG. 12 is a schematic cross-sectional view of the portion A of the snake bone of FIG. 5;

FIG. 13 is a schematic cross-sectional view of an assembled structure of a snake bone with a flexible tube, a butt-joint tube and a first adhesive member in the insertion tube of FIG. 3;

FIG. 14 is a schematic cross-sectional view of an assembled structure of a snake bone in an insertion tube, a flexible tube, a butt joint tube and a first adhesive member according to a second embodiment of the application;

FIG. 15 is a schematic cross-sectional view of an assembled structure of a snake bone in an insertion tube, a flexible tube, a butt joint tube and a first adhesive member according to a third embodiment of the invention;

FIG. 16 is a schematic view showing a part of the structure of a snake bone in an insertion tube according to the fourth embodiment of the invention;

fig. 17 is a schematic cross-sectional view showing an assembled structure of a snake bone, a flexible tube, a butt joint tube and a first adhesive member in an insertion tube according to a fifth embodiment of the application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

Referring to fig. 1 and 2, fig. 1 is a schematic structural view of an endoscope 1000 according to a first embodiment of the present application, and fig. 2 is an exploded structural view of the endoscope 1000 shown in fig. 1.

The endoscope 1000 may be used to visually inspect inaccessible locations, such as a body cavity of a human body. For convenience of description, the extending direction of the endoscope 1000 shown in fig. 1 is defined as the X-axis direction. The present embodiment describes the terms "distal" and "proximal" and the like in terms of orientation with respect to the endoscope 1000, i.e., the terms "distal" and "proximal" are used in terms of the positive direction toward the X-axis and the negative direction toward the X-axis, i.e., the terms "proximal" and "distal" are used in terms of the direction toward the operator and the direction away from the operator when the operator is using the endoscope 1000.

In this embodiment, endoscope 1000 includes handle 1, insertion tube 2, lens 4, cable (neither shown in fig. 1 nor 2), driver 6, traction wire 7, and working tube 8. The insertion tube 2 is connected to the handle 1 and communicates with the inside of the handle 1. Wherein the handle 1 is oriented towards the operator when the endoscope 1000 is in use.

The lens 4 is mounted at one end of the insertion tube 2 away from the handle 1, and the cable is electrically connected with the lens 4 and is accommodated inside the insertion tube 2. The cable is used for transmitting information acquired by the lens 4 and/or transmitting control information of a user on the lens 4. For example, the cable may be electrically connected to an external cable and electrically connected to a computing device such as a computer through the external cable, so as to process information acquired by the lens 4 by using the computing device such as a computer.

The driving member 6 is mounted on the handle 1, and the traction wire 7 is fixedly connected between the insertion tube 2 and the driving member 6, extends along the extending direction of the insertion tube 2, and is accommodated inside the insertion tube 2. Wherein the driving member 6 is used for driving the traction wire 7 to move so as to shorten or lengthen the traction wire 7. Illustratively, the driving member 6 includes a rotating wheel and an operating rod, the rotating wheel is accommodated inside the handle 1, the operating rod is fixedly connected with the rotating wheel, and the traction wire 7 is fixedly connected between the insertion tube 2 and the rotating wheel. The operator can stir the operating rod to drive the rotating wheel to rotate, thereby driving the traction wire 7 to move and further driving the traction wire 7 to be tensioned or loosened. In this embodiment, there are two traction wires 7. In other embodiments, the number of the traction wires 7 may be three, four, etc., which is not limited in this application.

The working tube 8 is inserted through the insertion tube 2 and the handle 1, and is housed inside the insertion tube 2 and the handle 1. A working tube 8 extends from the insertion tube 2 to the handle 1 and is used to house tools such as instruments. Illustratively, the instrument includes a biopsy forceps, a cytobrush, or the like. Wherein the working tube 8 comprises an inlet 81 and an outlet 83. The inlet 81 of the working tube 8 is exposed to the handle 1 to communicate the inside and outside of the handle 1. The outlet 83 of the working tube 8 is exposed to the insertion tube 2 to communicate the inside and outside of the insertion tube 2.

In use, an operator can hold the handle 1 to advance the endoscope 1000 into a location to be visually inspected. Wherein a lens 4 mounted at the distal end of the insertion tube 2 is directed toward the position to be visually inspected to acquire information at the position to be visually inspected. The inner side of the working tube 8 forms a working channel, and tools such as instruments can extend from the proximal handle 1 side into the inlet 81 of the working tube 8 and from the distal outlet 83 of the working tube 8 to perform work at the location to be visually inspected. When the position to be checked is required to be adjusted, the operator operates the driving piece 6, the driving piece 6 drives the traction wire 7 to move, and the traction wire 7 is driven to be tensioned or loosened to drive the insertion tube 2 to bend, so that the working tube 8 mounted on the inner side of the insertion tube 2 is driven to bend, the position of the lens 4 is adjusted, the position of the outlet 83 of the working tube 8 is adjusted, and tools such as instruments and the like can be conveniently operated at the adjusted position to be checked visually.

Referring to fig. 2, 3 and 4 in combination, fig. 3 is a schematic view of the structure of the insertion tube 2 in the endoscope 1000 shown in fig. 2, and fig. 4 is an exploded schematic view of the insertion tube 2 shown in fig. 3.

The insertion tube 2 includes a flexible tube 100, a docking tube 200, a snake bone 300, a head 500 and a first adhesive 700 (see fig. 13). The flexible tube 100 is disposed opposite to the snake bone 300, the butt joint tube 200 is sleeved on the outer sides of the flexible tube 100 and the snake bone 300, and the first adhesive member 700 is adhered between the inner side of the butt joint tube 200 and the outer side of the flexible tube 100 and the outer side of the snake bone 300, so that the butt joint tube 200 is fixedly connected with the flexible tube 100 and the snake bone 300, and the flexible tube 100 and the snake bone 300 are fixedly connected. The head 500 is mounted to the snake bone 300 at an end thereof which is directed in the extending direction and away from the flexible tube 100.

Specifically, the flexible tube 100 extends in the X-axis direction. Wherein the flexible tube 100 may be bent and deformed by an external force. The flexible pipe 100 is provided with a through groove 110, and the through groove 110 penetrates the flexible pipe 100 in the extending direction of the flexible pipe 100. In this embodiment, the flexible tube 100 has an outer diameter D1.

The docking tube 200 extends in the X-axis direction. The nipple 200 is provided with a penetration groove 210, and the penetration groove 210 penetrates the nipple 200 in the extending direction of the nipple 200. In this embodiment, the inner diameter of the butt joint pipe 200 is D2. Wherein D2 > D1. The wall thickness of the butt joint pipe is D, and D is more than or equal to 0.05cm and less than or equal to 1cm by way of example. Wherein, the material of the butt joint pipe 200 comprises metal or nonmetal.

Referring to fig. 5, 6, 7 and 8 in combination, fig. 5 is a schematic structural view of the snake bone 300 in the insertion tube 2 shown in fig. 4, fig. 6 is a schematic structural view of the snake bone 300 shown in fig. 5 at another viewing angle, fig. 7 is a schematic exploded structural view of the snake bone 300 shown in fig. 5, and fig. 8 is a schematic exploded structural view of the snake bone 300 shown in fig. 5 at another viewing angle.

The snake bone 300 is provided with a first channel 301, a second channel 303 and a third channel 305. The first, second and third channels 301, 303 and 305 each penetrate the snake bone 300 along the extending direction of the snake bone 300, and the first, second and third channels 301, 303 and 305 are disposed at a distance from each other. Wherein the first channel 301, the second channel 303, and the third channel 305 are spaced apart from each other means that at least part of each of the first channel 301, the second channel 303, and the third channel 305 in the extending direction is spaced apart from each other. Wherein, the first channel 301 is used for accommodating the working tube 8, the second channel 303 is used for accommodating the cable, and the third channel 305 is used for accommodating the traction wire 7. In this embodiment, the inner diameter of the first channel 301 > the inner diameter of the third channel 305. There are two third passages 305, and two third passages 305 accommodate two traction wires 7, respectively.

The snake bone 300 extends in the X-axis direction. The snake bone 300 includes a main body 300a, a mounting portion 300b and a fixing portion 300c. The mounting portion 300b and the fixing portion 300c are connected to opposite ends of the main body 300a in the extending direction, and each communicates with the main body 300 a. Wherein the mounting portion 300b is for interfacing with the flexible tube 100, and the fixing portion 300c is for connecting with the head 500. In this embodiment, the outer diameter of the main body 300a is D3, the outer diameter of the mounting portion 300b is D4, and the outer diameter of the fixing portion 300c is D5. The outer diameter D4 of the mounting portion 300b is smaller than the outer diameter D3 of the main body 300a, the outer diameter D4 of the mounting portion 300b is substantially equal to the outer diameter D1 of the flexible tube 100, and the outer diameter D5 of the fixing portion 300c is substantially equal to the outer diameter D3 of the main body 300 a.

The main body 300a extends in the X-axis direction. In this embodiment, the body 300a includes at least two body portions 310 and a connector 330. Adjacent two segments of body portion 310 are connected by a connector 330. Wherein each segment of the body portion 310 has an outer diameter equal to D5. The material of the connecting piece 330 and the material of the at least two sections of the main body portion 310 can be the same, which is beneficial to molding the connecting piece 330 and the main body portion 310 together, thereby improving the assembly efficiency of the snake bone 300. It will be appreciated that in other embodiments, the body 300a may be integrally formed without the connector 330.

In this embodiment, the at least two-stage body portion 310 includes a first body portion 310a and a second body portion 310b, and the first body portion 310a and the second body portion 310b are located at two ends of the body 300a that are disposed opposite to each other in the extending direction. In this embodiment, the main body portion 310 of the snake bone 300 has two sections, and the two sections of main body portions 310 are a first main body portion 310a and a second main body portion 310b, respectively, the first main body portion 310a is located at one end of the main body 300a along the negative X-axis direction, and the second main body portion 310b is located at one end of the main body 300a along the positive X-axis direction. It will be appreciated that in other embodiments, the body 300a may also include a middle section body portion 310, the middle section body portion 310 being connected between the first body portion 310a and the second body portion 310 b. The main body portion 310 of the middle section may have one section, two sections, etc., where the total number of main body portions 310 in the main body 300a is three sections, four sections, etc., and the number of sections of the main body portion 310 in the main body 300a is not limited in this embodiment.

Specifically, each segment body portion 310 includes a plurality of condyles 10 and a connecting portion 30. The connecting portion 30 is connected between two adjacent condyles 10, and a plurality of condyles 10 are movably connected to each other through the connecting portion 30.

Referring to fig. 9 and 10 in combination, fig. 9 is a schematic cross-sectional structure of a portion of the condyle 10 of the main body 300a of the snake bone 300 shown in fig. 5, and fig. 10 is a schematic cross-sectional structure of the snake bone 300 shown in fig. 5.

The axial direction of each condyle 10 is the X-axis direction. Each condyle 10 is provided with a first through hole 11, a second through hole 13, and a third through hole 15. The first through hole 11, the second through hole 13 and the third through hole 15 each penetrate the condyle 10 in the axial direction of the condyle 10 and are disposed at intervals from each other. In this embodiment, the first through holes 11 of the bone segments 10 are communicated along the axial direction of the bone segments 10 to form a first channel 301, the second through holes 13 of the bone segments 10 are communicated along the axial direction of the bone segments 10 to form a second channel 303, and the third through holes 15 of the bone segments 10 are communicated along the axial direction of the bone segments 10 to form a third channel 305. The third through hole 15 is a pulling wire hole, and the third channel 305 is used for accommodating the pulling wire.

In the present embodiment, the aperture of the first through hole 11 > the aperture of the second through hole 13 > the aperture of the third through hole 15. The third through holes 15 of each condyle 10 are two, and the two third through holes 15 are arranged at intervals and are respectively positioned at two sides of the first through hole 11 and the second through hole 13. The two third through holes 15 of the plurality of condyles 10 are respectively communicated in the axial direction of the condyle 10 to form two third passages 305. Each third through hole 15 is configured to receive one traction wire 7 therethrough, so that the snake bone 300 can be bent toward the direction in which the two traction wires 7 are pulled. It will be appreciated that when more third through holes 15 are provided to accommodate more traction wires 7, the plurality of traction wires 7 may cooperate with each other such that the bending direction in which the snake bone 300 may be adjusted is finer and the degree of freedom of the snake bone 300 is higher. In addition, through setting up two third through-holes 15 and being located the both sides of first through-hole 11 and second through-hole 13 respectively, do benefit to the crooked scope of promotion snake bone 300 to do benefit to the use scene of expansion snake bone 300.

At least one condyle 10 in each segment body portion 310 is also provided with a first slot 17 and a second slot 18. The openings of the first slot 17 and the second slot 18 are respectively arranged on two surfaces of the condyle 10 which are arranged opposite to each other along the axial direction, and the first slot 17 and the second slot 18 penetrate through the peripheral surface of the condyle 10. In this embodiment, the first slot 17 communicates with the second slot 18 in the axial direction of the condyle 10 to form the third through-hole 15. When the third channel 305 formed by the third through hole 15 is smaller in size for receiving the contents such as the slim traction wire 7, the third channel 305 to be formed may be slimmer. Therefore, when the third channel 305 is formed by core-pulling preparation, the core-pulling is thin and long, the difficulty of mold processing is increased, and the core-pulling is easy to break when being pulled out, so that the third channel 305 is difficult to form, the core-pulling is expensive, and the production cost of the snake bone 300 is increased. According to the embodiment of the application, the first grooves 17 and the second grooves 18 are formed in the condyle 10, so that core pulling is not needed when the third channel 305 of the snake bone 300 is formed, the first grooves 17 and the second grooves 18 can be formed on the single condyle 10 respectively by using the die, then the staggered first grooves 17 and the staggered second grooves 18 are communicated to form the third through holes 15, the third channel 305 is formed, the difficulty of the slender channel in the forming process is eliminated, the problem that the third channel 305 is easy to break in the existing preparation process by using the core pulling is solved, the supporting strength of each main body part 310 in the snake bone 300 is not influenced, the use of the core pulling is eliminated, the processing difficulty of the die is reduced, and meanwhile, the production cost of the snake bone 300 is reduced.

The first slot 17 forms a first opening in the circumferential surface of the condyle 10 and the second slot 18 forms a second opening in the circumferential surface of the condyle 10. Wherein the first opening and the second opening are respectively oriented to the condyle 10 along opposite directions of a tangent line, and the tangent line is parallel to the radial direction of the condyle 10. The dashed line AB shown in fig. 10 is a tangent to the condyle 10, with the first opening formed by the first slot 17 facing in the direction AB and the second opening formed by the second slot 18 facing in the direction BA. The first opening formed by the first slot 17 on the peripheral surface of the condyle 10 and the second opening formed by the second slot 18 on the peripheral surface of the condyle 10 are opposite in direction, so that the slot wall of the first slot 17 and the slot wall of the second slot 18 completely cover the contents, such as the traction wire 7, penetrating through the third through hole 15 in the radial direction of the condyle 10 by 360 degrees, so that the traction wire 7 is completely restrained in the third channel 305, and the traction wire 7 is not separated from the limitation of the third channel 305 when the snake bone 300 is used at various angles.

Referring to fig. 11 in combination, fig. 11 is a schematic structural view of a portion of the condyle 10 and the connecting portion 30 of the snake bone 300 shown in fig. 5. In the present embodiment, the connection part 30 includes a plurality of connection parts 31, and the plurality of connection parts 31 are disposed at intervals from each other. Each connecting portion 31 is connected between two adjacent condyles 10 to achieve the connection of the connecting portion 30 between two adjacent condyles 10, thereby achieving the movable connection between two adjacent condyles 10 and further achieving the assembly of the main body portion 310.

Wherein, the plurality of connecting parts 31 are positioned on the same straight line, so that the connecting parts 31 are prevented from obstructing the movement between the adjacent two condyles 10, the freedom of the movement between the adjacent two condyles 10 is improved, and the bending of the snake bone 300 is easy to adjust. In this embodiment, the connection portion 30 between the adjacent bone segments 10 includes three connection portions 31, two connection portions 31 are located at two opposite ends of the bone segment 10 in the radial direction, and one connection portion 31 is located between the opening of the first through hole 11 and the opening of the second through hole 13 in the bone segment 10 and is located in the same line as the other two connection portions 31.

With continued reference to fig. 9 and 10, in the present embodiment, the connecting member 330 includes a first connecting portion 331 and a second connecting portion 333, and the first connecting portion 331 and the second connecting portion 333 are respectively disposed between two adjacent main body portions 310. Specifically, in the two adjacent sections of the main body portion 310, the first connection portion 331 and the second connection portion 333 are respectively disposed on a surface of the one section of the main body portion 310 facing the other section of the main body portion 310, and the first connection portion 331 and the second connection portion 333 are fixedly connected to achieve the fixed connection between the two adjacent sections of the main body portion 310, so that the two adjacent sections of the main body portion 310 are connected through the connection piece 330, and further the assembly of the main body 300a is achieved.

In this embodiment, the first connecting portion 331 is a protrusion, and the protrusion is protruding from a surface of the first body portion 310a facing the condyle 10 of the second body portion 310 b. The second connecting portion 333 is a recess, and an opening of the recess is formed on a surface of the second body portion 310b facing the condyle 10 of the first body portion 310 a. In the present embodiment, the convex-concave matching is utilized to realize the fixed connection between the first connection portion 331 and the second connection portion 333, so as to realize the fixed connection between the first body portion 310a and the second body portion 310 b. It is understood that in other embodiments, the connector 330 may also include at least one of the following: adhesive, concave-convex structure, steel ring and rivet.

In the main body 300a of the snake bone 300, at least one of the number of holes of at least one bone segment 10, the sectional shape of the bone segment 10, and the formation shape of the third through hole 15 is different from other bone segments 10. The "number of holes" of the bone segment 10 refers to the number of holes in the bone segment 10 after the holes are communicated. Illustratively, at least two of the first through holes 11, the second through holes 13, and the third through holes 15 may be communicated by providing through holes or communication holes to change the number of holes of the condyle 10.

With continued reference to fig. 7 and 8, in two adjacent main body portions 310 of the snake bone 300 of the embodiment, at least a part of the bone segments 10 of at least one main body portion 310 facing the other main body portion 310 are provided with through holes 107, the through holes 107 penetrate through the bone segments 10 along the axial direction of the bone segments 10, and the through holes 107 are communicated with at least two of the first through holes 11, the second through holes 13 and the third through holes 15. Through the through hole 107, at least two of the first through hole 11, the second through hole 13 and the third through hole 15 in the condyle 10 at the joint of the two adjacent sections of the main body part 310 are communicated, the first channel 301, the second channel 303 and the third channel 305 of the snake bone 300 are arranged at intervals, the channel of the snake bone 300 at the joint of the two adjacent sections of the main body part 310 is enlarged, the natural transition of the content accommodated in the inner side of each section of the main body part 310 at the joint is facilitated, and accordingly the assembly reliability of the snake bone 300 at the joint of the two adjacent sections of the main body part 310 is improved.

Specifically, as shown in fig. 8, at least a portion of the bone joint 10 of the first body portion 310a facing the second body portion 310b in this embodiment is provided with a through hole 107, and the through hole 107 communicates with the first through hole 11, the second through hole 13 and the third through hole 15. At this time, the number of holes of the partial condyle 10 in the first body portion 310a is one. As shown in fig. 7, at least a portion of the condyle 10 of the second body portion 310b facing the first body portion 310a is provided with a through hole 107, and the through hole 107 communicates with the first through hole 11, the second through hole 13, and the third through hole 15. At this time, the number of holes of the partial condyle 10 in the second body portion 310b is one. The first channel 301, the second channel 303 and the third channel 305 of the snake bone 300 are communicated into one channel at the connection of the first body portion 310a and the second body portion 310b, and the channel portions at the other bone segments 10 are arranged at intervals so as to realize that the first channel 301, the second channel 303 and the third channel 305 of the snake bone 300 are arranged at intervals. It will be appreciated that in other embodiments, the through-holes 107 may be provided only in at least a portion of the condyle 10 of the first body portion 310a facing the second body portion 310b, or the through-holes 107 may be provided only in at least a portion of the condyle 10 of the second body portion 310b facing the first body portion 310 a.

With continued reference to fig. 5, 7 and 12, fig. 12 is a schematic cross-sectional view of portion a of the snake bone 300 shown in fig. 5.

The mounting portion 300b extends in the X-axis direction. The mounting portion 300b is mounted to one end of the main body 300a in the negative X-axis direction and communicates with the inside of the main body 300 a. In this embodiment, the mounting portion 300b is a bone segment 10, and the mounting portion 300b is connected to the bone segment 10 of the first body portion 310 a. The mounting portion 300b is provided with a first through hole 11, a second through hole 13, and a third through hole 15, and each of the first through hole 11, the second through hole 13, and the third through hole 15 penetrates the mounting portion 300b in the extending direction of the mounting portion 300b.

The mounting portion 300b includes a first mating surface 52, and the first mating surface 52 is an end surface of the mounting portion 300b facing away from the main body 300 a. Wherein the first mating surface 52 is for interfacing with an end surface of the flexible tube 100. In this embodiment, the first mating surface 52 of the mounting portion 300b and the end surface of the flexible tube 100 are flat. It will be appreciated that in other embodiments, the first mating surface 52 may be in concave-convex engagement with the end surface of the flexible tube 100, that is, the first mating surface 52 may be convex toward the surface of the flexible tube 100, the end surface of the butt joint tube 200 facing the first mating surface 52 may be concave, the convex first mating surface 52 may be concave toward the end surface of the concave flexible tube 100, or the portion of the surface of the first mating surface 52 facing the flexible tube 100 may be concave, and the end surface of the flexible tube 100 facing the first mating surface 52 may be convex, and the concave first mating surface 52 may be concave and concave toward the end surface of the convex flexible tube 100.

The mounting portion 300b is provided with a first groove 40, and an opening of the first groove 40 is provided on the peripheral surface of the mounting portion 300 b. In this embodiment, the opening of the first groove 40 is disposed around the peripheral surface of the mounting portion 300b, i.e., the first groove 40 is an annular groove. The plurality of first grooves 40 are provided, and the plurality of first grooves 40 are disposed at intervals along the extending direction of the mounting portion 300 b.

In this embodiment, the mounting portion 300b is further provided with a first through hole 108, and the first through hole 108 penetrates the mounting portion 300b along the extending direction of the mounting portion 300b and communicates with the first through hole 11 and the second through hole 13 of the mounting portion 300 b. At this time, the number of holes of the mounting portion 300b is three. It will be appreciated that, in other embodiments, at least a portion of the bone segments 10 of the first body portion 310a connected to the mounting portion 300b facing the mounting portion 300b may be provided with first communication holes 108, where the first communication holes 108 penetrate the bone segments 10 along the axial direction of the bone segments 10 and communicate the first through holes 11 with the second through holes 13. At this time, the number of holes of the partial condyle 10 in the first body portion 310a is three.

In this embodiment, the insertion tube 2 further includes a boss 50, and the boss 50 is protruding from the circumferential surface of the mounting portion 300b and extends along the circumferential direction of the mounting portion 300 b. In this embodiment, the boss 50 is an annular boss, and is disposed around a circumference of the mounting portion 300 b. In other embodiments, the boss 50 may surround only a portion of the peripheral surface of the mounting portion 300 b. The outer diameter of boss 50 > the outer diameter D4 of mounting portion 300 b. In this embodiment, the outer diameter of the boss 50 is substantially equal to the outer diameter D3 of the body 300 a. The boss 50 includes a second mating surface 51, the second mating surface 51 for mating with an end surface of the docking tube 200. In this embodiment, the second mating surface 51 is a side end surface of the boss 50 along the negative X-axis direction. The second mating surface 51 is relatively flat with the end surface of the docking tube 200. It will be appreciated that, in other embodiments, the second mating surface 51 may be in concave-convex engagement with the end surface of the butt joint pipe 200, that is, the portion of the surface of the second mating surface 51 facing the butt joint pipe 200 is convex, the end surface of the butt joint pipe 200 facing the second mating surface 51 is concave, the convex second mating surface 51 is in concave-convex engagement with the end surface of the concave butt joint pipe 200, or the portion of the surface of the second mating surface 51 facing the butt joint pipe 200 is concave, the end surface of the butt joint pipe 200 facing the second mating surface 51 is convex, and the concave second mating surface 51 is in concave-convex engagement with the convex end surface of the butt joint pipe 200. It will be appreciated that in other embodiments, the insertion tube 2 may further be provided with a second adhesive member, and the second adhesive member is connected between the second mating surface 51 and the end surface of the docking tube 200, so as to further enhance the connection firmness between the docking tube 200 and the mounting portion 300b of the snake bone 300.

With continued reference to fig. 5 and 8, the fixing portion 300c extends in the X-axis direction. The fixing portion 300c is connected to one end of the main body 300a in the positive X-axis direction, and communicates with the inside of the main body 300 a. The fixing portion 300c is provided with a receiving groove 60, and the receiving groove 60 is used for receiving the lens 4. The opening of the accommodating groove 60 is disposed on an end surface of the fixing portion 300c along the extending direction and away from the main body 300 a. In this embodiment, the fixing portion 300c is a bone segment 10, and the fixing portion 300c is connected to the bone segment 10 of the second body portion 310 b. The fixing portion 300c is provided with a first through hole 11, a second through hole 13, and a third through hole 15, and openings of the first through hole 11, the second through hole 13, and the third through hole 15 are all provided in a bottom wall of the accommodating groove 60, and penetrate through a bottom wall of the accommodating groove 60 in a thickness direction of the bottom wall of the accommodating groove 60. The first through hole 11, the second through hole 13 and the third through hole 15 are disposed at a distance from each other and are all in communication with the receiving groove 60.

The fixing portion 300c is further provided with a second communication hole 109, and an opening of the second communication hole 109 is provided in a bottom wall of the accommodating groove 60, and penetrates the bottom wall of the accommodating groove 60 in a thickness direction of the bottom wall of the accommodating groove 60. The second communication hole 109 communicates with the accommodation groove 60, and communicates with the first through hole 11 and the second through hole 13. At this time, the number of holes of the fixing portion 300c is three. It is to be understood that, among the plurality of condyles 10 of the second body portion 310b connected to the fixing portion 300c, at least some condyles 10 facing the fixing portion 300c may be provided with the second communication holes 109, where the second communication holes 109 penetrate the condyles 10 along the axial direction of the condyles 10 and communicate the first through holes 11 with the second through holes 13. At this time, the number of holes of the partial condyle 10 in the second body portion 310b is three.

In the snake bone 300 of the embodiment, the mounting portion 300b is integrally formed with the first body portion 310a of the body 300a, and the fixing portion 300c is integrally formed with the second body portion 310 b. The first through holes 11 of the bone segments 10 in the at least two segments of the main body part 310 are communicated to form a first channel 301, the second through holes 13 are communicated to form a second channel 303, and the third through holes 15 are communicated to form a third channel 305. By arranging the first through hole 11, the second through hole 13 and the third through hole 15 at intervals, so that the formed first channel 301, second channel 303 and third channel 305 are arranged at intervals, the contents contained in the first channel 301, the second channel 303 and the third channel 305 are ensured to be respectively contained in the respective channels, and the problem that when the existing snake bone 300 only has one large channel to contain various contents, the various contents are too free in the channel, so that the position is easy to be disordered is avoided. In addition, the hole walls of the first through hole 11, the second through hole 13 and the third through hole 15 in the bone segments 10 of the main body part 310 play a supporting role, and can support the contents contained in the first channel 301, the second channel 303 and the third channel 305, so that the supporting strength of the snake bone 300 is better, and the problem that the supporting strength of the snake bone 300 is poorer due to the fact that the inside of the channel is not provided with a connecting structure in the scheme that the existing snake bone 300 only has one large channel is solved.

In addition, in preparing the snake bone 300 using a mold, it is necessary to prepare a channel for forming the snake bone 300 using a loose core, for example, in forming the first channel 301, it is necessary to use a loose core having substantially the same length as the first channel 301 as a mold, and withdraw the loose core after preparing the snake bone 300 to form the first channel 301. Because the snake bone 300 has a longer length, the material for molding the snake bone 300 is easy to break and loose core, thereby increasing the molding difficulty of the snake bone 300. In the snake bone 300 provided in this embodiment, by setting at least two sections of the main body portions 310, on one hand, when preparing the snake bone 300, only each section of the main body portion 310 needs to be molded, and then the connecting piece 330 is used to fixedly connect two adjacent sections of the main body portions 310, because each section of the main body portion 310 is shorter than the whole snake bone 300 in length, the ratio between the channel length and the channel section is reduced, thus the molding difficulty of the main body portion 310 is reduced, and the molding of each section of the main body portion 310 is easier than the molding of the whole snake bone 300, and the problem of difficult molding of the snake bone 300 is solved. In addition, compared to the existing method in which the snake bone 300 is assembled by the bone segments 10, in the embodiment of the application, each segment of the main body portion 310 includes a plurality of bone segments 10, and the snake bone 300 is assembled by the main body portion 310, so that the assembling efficiency of the snake bone 300 can be improved.

With continued reference to fig. 3, the head 500 extends in the X-axis direction. The head 500 is provided with a first receiving chamber 510 and a second receiving chamber 530, and the first receiving chamber 510 and the second receiving chamber 530 penetrate the head 500 along the extending direction of the head 500 and are arranged at intervals. The first accommodating cavity 510 is used for accommodating the working tube 8, and the second accommodating cavity 530 is used for accommodating the lens 4.

Referring to fig. 13 in combination, fig. 13 is a schematic cross-sectional view of the assembled structure of the snake bone 300 with the flexible tube 100, the butt joint tube 200 and the first adhesive member 700 in the insertion tube 2 shown in fig. 3.

In the assembled insertion tube 2, the first mating surface 52 of the mounting portion 300b of the snake bone 300 faces the flexible tube 100, and the first mating surface 52 is disposed opposite to the end surface of the flexible tube 100. The butt joint pipe 200 is sleeved outside the mounting portion 300b and outside a part of the flexible pipe 100. Wherein the docking tube 200 covers the opening of the first groove 40 of the mounting part 300 b. The second mating surface 51 of the boss 50 faces the adapter tube 200, the end surface of the adapter tube 200 abuts against the boss 50 protruding from the peripheral surface of the mounting portion 300b, and the end surface of the adapter tube 200 mates with the second mating surface 51 of the boss 50.

The first adhesive member 700 is disposed in the first groove 40 and is fixedly connected between the groove wall of the first groove 40 and the inner side of the adapter tube 200, so as to realize that the first adhesive member 700 is fixedly connected between the outer side of the mounting portion 300b and the inner side of the adapter tube 200. The first adhesive member 700 is further fixedly connected between the outer side of a portion of the flexible pipe 100 and the inner side of the butt joint pipe 200, so that the first adhesive member 700 is fixedly connected between the outer side of the flexible pipe 100 and the inner side of the butt joint pipe 200, thereby realizing the fixed connection between the mounting portion 300b and the flexible pipe 100, and further realizing the fixed connection between the snake bone 300 and the flexible pipe 100. Wherein the through groove 110 of the flexible tube 100 is communicated with the first channel 301, the second channel 303 and the third channel 305 of the snake bone 300, so as to realize the communication between the flexible tube 100 and the inner side of the snake bone 300.

The head 500 is mounted to the fixing portion 300c of the snake bone 300 to achieve connection of the head 500 and the flexible tube 100 to opposite ends of the snake bone 300 in the extending direction. The receiving groove 60 of the fixing portion 300c is connected between the first receiving cavity 510 of the head 500 and the first channel 301 of the snake bone 300, and between the second receiving cavity 530 and the second channel 303 of the snake bone 300, so as to realize the communication between the head 500 and the inner side of the snake bone 300.

In the assembled endoscope 1000, the flexible tube 100 in the insertion tube 2 is connected to the handle 1 and communicates with the inside of the handle 1 to achieve connection between the insertion tube 2 and the handle 1. The lens 4 is mounted on the head 500 in the insertion tube 2 and is accommodated in the second accommodation cavity 530 of the head 500 and the accommodation groove 60 of the fixing portion 300 c. The cable is electrically connected to the lens 4 and is accommodated in the second channel 303 of the snake bone 300 and the through groove 110 of the flexible tube 100. The traction wire 7 is fixedly connected to the condyle 10 of the main body portion 310 of the snake bone 300 facing the head 500, is received in the third channel 305 of the snake bone 300 and the through groove 110 of the flexible tube 100, and extends from the snake bone 300 through the flexible tube 100 to be connected with the driving member 6 mounted on the handle 1. The working tube 8 is sequentially inserted and accommodated inside the handle 1, the through groove 110 of the flexible tube 100, the first channel 301 of the snake bone 300 and the first accommodating cavity 510 of the head 500. Wherein the inlet 81 of the working tube 8 is located on the side of the handle 1, the outlet 83 is located on the side of the head 500, and is exposed opposite to the head 500.

In this embodiment, when the endoscope 1000 is used, the operator operates the driving member 6 to drive the traction wire 7 to tighten, so as to drive the condyles 10 of the snake bone 300 fixedly connected with the traction wire 7 to move, thereby driving other condyles 10 to move, and further realizing bending of the snake bone 300 towards one side of the tightened traction wire 7. At this time, the head 500 connected to the snake bone 300 may rotate as the snake bone 300 is bent, the lens 4 mounted on the head 500 adjusts the position to be visually inspected, and the outlet 83 of the working tube 8 is adjusted accordingly, thereby facilitating the implement such as an instrument to extend from the outlet 83 and operate at the adjusted position to be visually inspected. After the endoscope 1000 is used, the operator can loosen the traction wire 7 to loosen the traction wire 7, so that the snake bone 300 is in a natural extension state.

In the insertion tube 2 provided in the embodiment of the present application, the connection between the flexible tube 100 and the snake bone 300 is fixedly connected through the butt joint tube 200. In the process of bending the insertion tube 2, the snake bone 300 and the flexible tube 100 are not directly fixedly connected, so that the snake bone 300 and the flexible tube 100 cannot be worn against each other in bending, but can be worn against the butt joint tube 200, when the insertion tube 2 is worn and broken, only the butt joint tube 200 needs to be replaced, and the problem that the whole butt joint tube 200 needs to be replaced when the conventional snake bone 300 is directly fixedly connected with the flexible tube 100 is solved.

Further, the flexible tube 100 and the snake bone 300 are fixedly connected through the butt-joint tube 200 by sleeving the butt-joint tube 200 on the outer side of the mounting part 300b of the flexible tube 100 and the snake bone 300. At this time, since there is no direct fixed connection between the mounting portion 300b and the flexible tube 100, the size of the butt joint portion between the mounting portion 300b and the flexible tube 100 will not be suddenly changed, so that the working tube 8 mounted on the inner side of the flexible tube 100 can naturally transition to the inner side of the snake bone 300, the working tube 8 will not deform or twist, the inside of the working tube 8 is ensured to be smooth, and further tools such as instruments and the like are ensured to work in the working tube 8 without being affected.

It will be appreciated that in the insertion tube 2 of other embodiments, the docking tube 200 may also be fixedly connected to the flexible tube 100 and the snake bone 300 by means of an adhesive. Specifically, the end face of the butt joint pipe 200 facing the flexible pipe 100 is bonded to the end face of the flexible pipe 100, and the end face of the butt joint pipe 200 facing the snake bone 300 is bonded to the snake bone 300, so that the butt joint pipe 200 is fixedly connected with the flexible pipe 100 and the snake bone 300 in a bonding manner.

In the insertion tube 2 of some embodiments, the docking tube 200 may also be fixedly connected with the flexible tube 100 and the snake bone 300 by a concave-convex structure. Specifically, the end surface of the butt joint pipe 200 facing the flexible pipe 100 may also be provided with a recess (or a protrusion), and the end surface of the flexible pipe 100 is correspondingly provided with a protrusion (or a recess), and the recess (or the protrusion) of the end surface of the butt joint pipe 200 facing the flexible pipe 100 is matched with the protrusion (or the recess) of the end surface of the flexible pipe 100, so as to realize the fixed connection of the butt joint pipe 200 and the flexible pipe 100 through the concave-convex structure. The end face of the butt joint pipe 200 facing the snake bone 300 can also be provided with a concave (or convex), the end face of the snake bone 300 is correspondingly provided with a convex (or concave), and the concave (or convex) of the end face of the butt joint pipe 200 facing the snake bone 300 is matched with the convex (or concave) of the end face of the snake bone 300, so that the butt joint pipe 200 is fixedly connected with the snake bone 300 through a concave-convex structure. In this case, the recess (or protrusion) of the end surface of the butt joint pipe 200 facing the flexible pipe 100 and the protrusion (or recess) of the end surface of the flexible pipe 100 may be bonded by adhesive, and the recess (or protrusion) of the end surface of the butt joint pipe 200 facing the snake bone 300 and the protrusion (or recess) of the end surface of the snake bone 300 may be bonded by adhesive.

It should be understood that in the insertion tube 2 of some embodiments, the docking tube 200 may be fixedly connected to the flexible tube 100 and the snake bone 300 by means of a buckle, etc., which is not limited in this application. The fastening scheme can adopt the scheme of the prior implementation of the fastening, and is not repeated here.

In addition, by setting the outer diameter D4 of the mounting portion 300b of the snake bone 300 smaller than the outer diameter D3 of the main body 300a, on the one hand, it can be ensured that the outer diameter of the butt joint pipe 200 is equal to the outer diameter D3 of the main body 300a after the butt joint pipe 200 is sleeved outside the mounting portion 300b, so that the outer diameter of the insertion pipe 2 is uniform and consistent in size and good in appearance. On the other hand, the inner side of the mounting part 300b is not affected and is communicated with the inner side of the main body 300a smoothly, so that the inside of the working tube 8 is ensured to be unobstructed.

In addition, through setting up boss 50 at insert tube 2, utilize boss 50 to support with the terminal surface of butt joint pipe 200 to the position of butt joint pipe 200 cover on the installation department 300b of snake bone 300 has been guaranteed on the one hand, and on the other hand has avoided flexible pipe 100 cover to locate the part of butt joint pipe 200 inboard and has not too much, has ensured the connection fastness of insert tube 2. It will be appreciated that in other embodiments, the boss 50 may be provided protruding from the peripheral surface of the flexible pipe 100, and the boss 50 may extend along the circumferential direction of the flexible pipe 100. At this time, the boss 50 protruding from the circumferential surface of the flexible tube 100 has substantially the same function and effect as the boss protruding from the circumferential surface of the mounting portion 300b, and will not be described again.

In addition, by providing the first groove 40 on the peripheral surface of the mounting portion 300b, the material of the first adhesive 700 can be accommodated in the first groove 40, and the material is adhered between the groove wall of the first groove 40 and the inner side of the butt joint pipe 200 by the first adhesive 700, so that the connection firmness between the butt joint pipe 200 and the snake bone 300 can be improved. It will be appreciated that in other embodiments, a second groove may be provided in the flexible tube 100, with the opening of the second groove being provided in the peripheral surface of the flexible tube 100. The butt joint pipe 200 covers the opening of the second groove, the first adhesive member 700 is disposed in the second groove, and is fixedly connected between the groove wall of the second groove and the inner side of the butt joint pipe 200, so that the connection firmness between the butt joint pipe 200 and the flexible pipe 100 can be improved. The second groove functions and effects are similar to those of the first groove 40, and will not be described here again.

In addition, by providing the first through hole 108 in the mounting portion 300b and/or providing the first through hole 108 in at least a portion of the bone segment 10 of the first body portion 310a of the body 300a facing away from the second body portion 310b, the first through hole 11 and the second through hole 13 are communicated with each other by the first through hole 108, so that the first through hole 11 and the second through hole 13 of the mounting portion 300b or a portion of the bone segment 10 of the first body portion 310a are combined into one large hole through the first through hole 108, which facilitates the smoother insertion of the working tube 8 into the first channel 301 formed by the first through hole 11 of the snake bone 300.

By providing the second communication hole 109 in the fixing portion 300c and/or providing the second communication hole 109 in at least a portion of the condyle 10 of the second body portion 310b facing away from the first body portion 310a, the first through hole 11 and the second through hole 13 are communicated by the second communication hole 109, so that the first through hole 11 and the second through hole 13 of the fixing portion 300c or a portion of the condyle 10 of the second body portion 310b are combined into one large hole through the second communication hole 109, and it is ensured that the lens 4 mounted on the head 500 has a larger accommodation space when the second body portion 310b of the snake bone 300 is assembled with the head 500.

Referring to fig. 14, fig. 14 is a schematic cross-sectional structure of an assembled structure of a snake bone 300 in an insertion tube 2, a flexible tube 100, a butt joint tube 200 and a first adhesive member 700 according to a second embodiment of the application.

The insertion tube 2 of the second embodiment differs from the insertion tube 2 of the first embodiment in that the insertion tube 2 of the second embodiment is further provided with first ribs 70.

Specifically, the first rib 70 is protruding from the circumferential surface of the mounting portion 300 b. In the present embodiment, the first rib 70 extends along the extending direction of the mounting portion 300 b. In the assembled insertion tube 2, the butt joint tube 200 is wrapped with the first rib 70 and is in interference fit with the first rib 70.

In this embodiment, by providing the first rib 70, the firmness of connection between the butt joint pipe 200 and the snake bone 300 can be improved by using the interference fit between the first rib 70 and the inner side of the butt joint pipe 200. It will be appreciated that in other embodiments, the insertion tube 2 may further be provided with a second rib, where the second rib is convexly disposed on the circumferential surface of the flexible tube 100, and the docking tube 200 wraps the second rib and is in interference fit with the second rib, so as to enhance the firmness of the connection between the docking tube 200 and the flexible tube 100.

Referring to fig. 15, fig. 15 is a schematic cross-sectional structure of an assembled structure of a snake bone 300 in an insertion tube 2, a flexible tube 100, an opposite tube 200 and a first adhesive member 700 according to a third embodiment of the invention.

The insertion tube 2 of the third embodiment is different from the insertion tube 2 of the first embodiment in that the butt joint tube 200 of the insertion tube 2 of the third embodiment is provided with an opening 230.

Specifically, the opening 230 penetrates the docking tube 200 in the wall thickness direction of the docking tube 200. The first adhesive member 700 includes a first adhesive portion 710 and a second adhesive portion 730. The first adhesive portion 710 is connected to the circumferential surface of the mounting portion 300b and the circumferential surface of the flexible tube 100, and the second adhesive portion 730 is fixedly connected to the first adhesive portion 710 and to the wall of the opening 230. In this embodiment, the first bonding portion 710 is further located in the first groove 40 and is connected to the groove wall of the first groove 40.

In the insertion tube 2 of the present embodiment, the opening 230 is provided in the butt-joint tube 200, so that the second bonding portion 730 and the first bonding portion 710 form an inverted structure, which can prevent the butt-joint tube 200 from moving along the extending direction relative to the snake bone 300, and improve the connection firmness of the first bonding member 700, the flexible tube 100 and the snake bone 300.

Referring to fig. 16, fig. 16 is a schematic view of a portion of a snake bone 300 in an insertion tube 2 according to the fourth embodiment of the invention.

The snake bone 300 in the insertion tube 2 of the fourth embodiment is different from the snake bone 300 in the insertion tube 2 of the first embodiment in that the first grooves 40 in the snake bone 300 of the insertion tube 2 of the fourth embodiment are plural, and the plural first grooves 40 are arranged at intervals along the circumferential surface of the mounting part 300b of the snake bone 300.

In this embodiment, the first groove 40 does not penetrate the wall thickness of the mounting portion 300b, and is a blind groove. In other embodiments, the first groove 40 may penetrate the mounting portion 300b in the wall thickness direction of the mounting portion 300b. At this time, when the first adhesive member 700 is provided, the opening of the first groove 40 facing away from the circumferential surface of the mounting portion 300b may be blocked using the support member, and the support member may be removed or left after the first adhesive member 700 is cured. The support member may also serve to strengthen the structural strength of the snake bone 300 while retaining the support member.

Referring to fig. 17, fig. 17 is a schematic cross-sectional structure of an assembled structure of a snake bone 300, a flexible tube 100, a butt joint tube 200 and a first adhesive member 700 in an insertion tube 2 according to a fifth embodiment of the application.

The insertion tube 2 of the fifth embodiment is different from the insertion tube 2 of the first embodiment in that the flexible tube 100 of the insertion tube 2 of the fifth embodiment includes a first portion 110 and a second portion 130 connected to the first portion 110, the first portion 110 having an outer diameter smaller than that of the second portion 130.

Specifically, the first portion 110 is disposed opposite the mounting portion 300 b. The butt joint pipe 200 is sleeved on the outer side of the first part 110 and is fixedly connected with the first part 110. For example, the first portion 110 may be fixedly coupled to the inner side of the docking tube 200 by the first adhesive 700.

In the insertion tube 2 of the present embodiment, the outer diameter of the first portion 110 is smaller than the outer diameter of the second portion 130 by setting the flexible tube 100 such that when the butt joint tube 200 is sleeved outside the first portion 110, the outer diameter of the butt joint tube 200 can be equal to the outer diameter of the second portion 130, so that the outer diameter of the insertion tube 2 is uniform and consistent, which is beneficial to improving the appearance effect of the insertion tube 2. It will be appreciated that in some embodiments, only the outer diameter of the mounting portion 300b may be smaller than the outer diameter of the body 300a, or only the outer diameter of the first portion 110 may be smaller than the outer diameter of the second portion 130.

The foregoing disclosure is only illustrative of the preferred embodiments of the present application and is not intended to limit the scope of the claims hereof, as it is to be understood by those skilled in the art that all or part of the procedures described herein may be performed and that equivalent changes may be made thereto without departing from the scope of the claims.

Claims

1. The utility model provides an insert tube, its characterized in that, insert tube includes snake bone, flexible pipe and butt joint pipe, the snake bone includes main part and installation department, the main part includes a plurality of bone segments each other swing joint, the installation department install in the main part is along the one end of extending direction, the butt joint pipe with installation department with the equal fixed connection of flexible pipe.

2. The insertion tube of claim 1, wherein the flexible tube comprises a first portion and a second portion connected to the first portion, the first portion is disposed opposite the mounting portion, the docking tube is sleeved outside the first portion, the docking tube is fixedly connected to the first portion, and an outer diameter of the first portion is smaller than an outer diameter of the second portion.

3. The insertion tube of claim 1, wherein the docking tube is sleeved outside of the mounting portion, and wherein an outer diameter of the mounting portion is smaller than an outer diameter of the main body.

4. The insertion tube according to claim 1, wherein the snake bone is provided with a first rib, the first rib is convexly arranged on the peripheral surface of the mounting part, and the butt joint tube is coated on the first rib and in interference fit with the first rib; and/or, the flexible Guan Sheyou second rib is arranged on the peripheral surface of the flexible pipe in a protruding mode, and the butt joint pipe is wrapped on the second rib and in interference fit with the second rib.

5. The insertion tube as claimed in claim 1, wherein the wall thickness of the butt joint tube is D,0.05 cm. Ltoreq.d.ltoreq.1 cm.

6. The insertion tube as claimed in any one of claims 1 to 5, wherein the butt joint tube is sleeved outside the mounting portion and outside a part of the flexible tube, the insertion tube further comprising a first adhesive member;

the first adhesive piece is connected between the inner side of the butt joint pipe and the peripheral surface of the mounting part; and/or the first bonding piece is connected between the inner side of the butt joint pipe and the peripheral surface of the flexible pipe.

7. The insertion tube as claimed in claim 6, wherein the installation portion is provided with a first groove, an opening of the first groove is formed in a circumferential surface of the installation portion, the butt joint tube covers the opening of the first groove, and the first adhesive member is formed in the first groove and fixedly connected between a wall of the first groove and an inner side of the butt joint tube.

8. The insertion tube of claim 6, wherein the flexible Guan Sheyou second groove has an opening provided on a circumferential surface of the flexible tube, the docking tube covers the opening of the second groove, and the first adhesive member is provided in the second groove and fixedly connected between a groove wall of the second groove and an inner side of the docking tube.

9. The insertion tube according to claim 6, wherein the butt-joint tube is provided with an opening penetrating the butt-joint tube in a wall thickness direction of the butt-joint tube, the first adhesive member includes a first adhesive portion fixedly connected to a peripheral surface of the mounting portion and a peripheral surface of the flexible tube, and a second adhesive portion fixedly connected to the first adhesive portion and to a wall of the opening.

10. An insertion tube according to any one of claims 1 to 5, wherein the insertion tube is provided with a boss which abuts against an end face of the docking tube;

the boss is convexly arranged on the peripheral surface of the mounting part and extends along the circumferential direction of the mounting part; and/or the boss is arranged on the peripheral surface of the flexible pipe in a protruding mode and extends along the circumferential direction of the flexible pipe.

11. The insertion tube as claimed in any one of claims 1 to 5, wherein the mounting portion abuts an end face of the flexible tube, the mounting portion including a first mating face that faces the flexible tube and is in concave-convex engagement with the end face of the flexible tube.

12. The insertion tube as claimed in any one of claims 1 to 5, wherein each of the condyles is provided with a pulling thread hole penetrating through the condyle in an axial direction of the condyle, the pulling thread holes of a plurality of the condyles are communicated to form a passage for accommodating a pulling thread, at least one of the condyles is provided with a first slot and a second slot, openings of the first slot and the second slot are respectively provided on two surfaces of the condyle disposed opposite to each other in the axial direction, and the first slot and the second slot penetrate through a circumferential surface of the condyle, and the first slot and the second slot are communicated in the axial direction of the condyle to form the pulling thread hole.

13. The insertion tube of any one of claims 1 to 5, wherein the body comprises at least two segments of body portion, each segment of body portion comprising a plurality of the condyles.

14. An endoscope, characterized by comprising a head, a lens, a cable, a working tube, a traction wire and an insertion tube according to any one of claims 1 to 13, wherein the head is mounted on one end of the main body along the extending direction and away from the mounting part, the lens is mounted on the head, the cable is electrically connected with the lens, the traction wire is fixedly connected with the snake bone, and the working tube, the cable and the traction wire are all accommodated inside the insertion tube.

15. The endoscope of claim 14, wherein the body comprises at least two sections of body portion connected to each other, each section of body portion comprising a plurality of the condyles, each of the condyles being provided with a first through-hole, a second through-hole, and a third through-hole, each of the first through-hole, the second through-hole, and the third through-hole penetrating the condyle in an axial direction of the condyle and being disposed at a distance from each other;

The first through holes of the plurality of condyles communicate to form a first passage, the second through holes of the plurality of condyles communicate to form a second passage, and the third through holes of the plurality of condyles communicate to form a third passage in the at least two-stage body portion;

the mounting part is communicated with the first channel, the second channel and the third channel and is communicated with the inner side of the flexible pipe;

the working tube is accommodated in the first channel, the cable is accommodated in the second channel, and the traction wire is accommodated in the third channel.