Insertion portion and endoscope

Abstract

The application discloses an insertion part and an endoscope, and relates to the technical field of medical devices. The insertion part comprises a first pipe structure and a plurality of segments. The plurality of segments are arranged at the first pipe structure in a spaced manner along the extension direction of the first pipe structure, and two adjacent segments can rotate relative to each other with the first pipe structure therebetween as support to realize bending of the insertion part. The first pipe structure penetrates the segments in sequence, and the distal end of the first pipe structure is in communication with the external space of the insertion part. The insertion part realizes that the rotating structure for bending of the insertion part is shared with a medium conveying channel. The compactness of each structure in the insertion part can be improved, and the size of the insertion part can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to an insertion part and an endoscope. BACKGROUND

[0002] An endoscope is a medical device used to examine internal organs and tissues in the human body. It consists of a flexible tubular structure and a small camera that can be inserted into the body through natural openings such as the mouth, nose, esophagus, stomach, intestines, or through incisions. Endoscopes are usually combined with a light source and image sensor, allowing doctors to clearly observe internal structures and make diagnoses and treatments.

[0003] In order to better diagnose and treat lesions in the body, instruments are often needed. Therefore, it is necessary to provide a channel for instruments to enter the insertion part of the endoscope. In order to enter smaller spaces, the insertion part of the endoscope needs to be made smaller. SUMMARY

[0004] The present application discloses an insertion part and an endoscope to solve the technical problem of the endoscope insertion part structure being not compact enough and having a large radial size in the related art.

[0005] To solve the above problems, the technical scheme adopted by the present application is as follows:

[0006] In some schemes of the present application, an insertion part is disclosed, which can be used in an endoscope. The insertion part includes a first tube structure and a plurality of segments. The plurality of segments are arranged along the extension direction of the first tube structure and are spaced apart from each other, and the first tube structure between any two adjacent segments can be used as a support for relative rotation to achieve bending of the insertion part. The first tube structure passes through the segments in sequence, and the distal end of the first tube structure is in communication with the external space of the insertion part.

[0007] In some schemes of the present application, an endoscope is disclosed, which includes the insertion part provided by the present application.

[0008] The technical scheme adopted by the present application can achieve the following beneficial effects:

[0009] The insertion part provided by the application connects multiple segments by the first pipe structure, so that the layout of two adjacent segments can be supported by the first pipe structure, avoiding the mutual approach between the two adjacent segments, and the two adjacent segments can also be relatively rotated by the deformation of the first pipe structure, thereby realizing the bending of the insertion part. The distal end of the first pipe structure communicates with the external space of the insertion part, that is, the distal end of the first pipe structure penetrates the surface of the insertion part and communicates with the space where the insertion part is located. In this way, the instrument or medium can be guided or delivered along the first pipe structure. In this scheme, the first pipe structure can not only realize the rotation connection between the segments, but also provide an instrument or medium delivery channel for the insertion part, realize the sharing of the rotation structure for bending of the insertion part and the medium delivery channel, and improve the compactness of each structure in the insertion part, which is beneficial to reducing the size of the insertion part. In addition, this scheme also makes the first pipe structure always located in the rotation structure, that is, the first pipe structure is always located in the same plane as the rotation axis of the rotation structure, thereby being beneficial to reducing the deformation amount of the medium delivery channel and improving the smoothness of the medium delivery channel. BRIEF DESCRIPTION OF DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0011] Figure 1 is the first schematic view of the insertion part provided by some embodiments of the present application;

[0012] Figure 2 is the second schematic view of the insertion part provided by some embodiments of the present application;

[0013] Figure 3 is the third schematic view of the insertion part provided by some embodiments of the present application;

[0014] Figure 4 is Figure 3 is the enlarged view of the distal end of the insertion part shown in

[0015] Figure 5 is the first cross-sectional view of the insertion part provided by some embodiments of the present application;

[0016] Figure 6 is Figure 5 is the enlarged view of A in

[0017] Figure 7 is the second cross-sectional view of the insertion part provided by some embodiments of the present application;

[0018] Figure 8 isFigure 7 enlarged view at B;

[0019] Figure 9 is a third cross-sectional view of the insertion portion provided by some embodiments of the present application;

[0020] Figure 10 is Figure 9 enlarged view at C;

[0021] Figure 11 is a fourth view of the insertion portion provided by some embodiments of the present application;

[0022] Figure 12 is Figure 11 enlarged view at D;

[0023] Figure 13 is Figure 11 enlarged view at E;

[0024] Figure 14 is a first cross-sectional view of the insertion portion provided by some embodiments of the present application;

[0025] Figure 15 is a second cross-sectional view of the insertion portion provided by some embodiments of the present application;

[0026] Figure 16 is a third cross-sectional view of the insertion portion provided by some embodiments of the present application;

[0027] Figure 17 is a cross-sectional view of the segment provided by some embodiments of the present application;

[0028] Figure 18 is a fourth cross-sectional view of the insertion portion provided by some embodiments of the present application;

[0029] Figure 19 is a view of the distal end face of the insertion portion provided by some embodiments of the present application;

[0030] Figure 20 is a fifth cross-sectional view of the insertion portion provided by some embodiments of the present application;

[0031] Figure 21 is Figure 20 enlarged view at F;

[0032] Figure 22 is a view of the first tube structure provided by some embodiments of the present application;

[0033] Figure 23 is a view of the endoscope provided by some embodiments of the present application;

[0034] Figure 24 is Figure 23An enlarged schematic view at G.

[0035] Reference numerals: 10-insertion part; 11-insertion tube; 12-bent tube; 100-first tube structure; 110-supporting structure; 120-channel tube; 130-first tube segment; 131-first sub-segment; 132-second sub-segment; 140-second tube segment; 150-third tube segment; 200-segment; 201-mounting cavity; 202-mounting groove; 203-mounting hole; 210-cavity wall; 300-connection part; 400-front end seat; 401-distal end face; 402-lateral wall face; 500-imaging assembly; 600-instrument tube structure; 700-sleeve; 800-pulling rope; 900-skin. DETAILED DESCRIPTION

[0036] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described in detail below. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0037] The terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally a class, not limited to the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in an "or" relationship.

[0038] In the embodiments of the present application, "proximal end" and "distal end" refer to the relative position of the endoscope and its accessories to the user along the extension direction of the endoscope and its accessories in the use environment, wherein the end closer to the user is designated as the "proximal end", and the end farther away from the user is designated as the "distal end".

[0039] The accompanying drawings are referred to in the description of the present application. Figures 1 to 24 The insertion part 10 and the endoscope provided by the embodiments of the present application are described in detail below in combination with specific embodiments and application scenarios.

[0040] With reference to the drawings, Figure 3 Some embodiments of the present application provide an insertion part 10. Specifically, the insertion part 10 can be an elongated structural member for entering the body along a natural or artificial cavity. Illustratively, the insertion part 10 can be used for an endoscope.

[0041] Referring to Figure 3 and Figure 4 In some embodiments, the insertion section 10 comprises a first tube structure 100 and a plurality of segments 200. The plurality of segments 200 are spaced along the extension of the first tube structure 100, and two adjacent segments 200 can rotate relative to each other with the first tube structure 100 in between as support, to achieve the bending of the insertion section 10. For example, the plurality of segments 200 can be connected by the first tube structure 100 to improve the bending performance of a section of the insertion section 10 adjacent to the distal end, to facilitate the insertion of the insertion section 10 into a cavity or to adapt to the morphology of the cavity. For example, the cavity can be a natural cavity or an artificial cavity of a human or animal body, or a cavity that needs to be explored by an endoscope in a machine or other production activities.

[0042] Referring to Figure 1 and Figure 2 In some embodiments, the insertion section 10 comprises a bending tube 12 and an insertion tube 11. For example, the bending tube 12 can be actively bent under the driving of the driving structure, to adjust the bending morphology of the distal end of the insertion section 10, to facilitate the insertion of the insertion section 10 into a cavity. For example, the plurality of segments 200 can be connected by the first tube structure 100 to form a snakebone structure of the bending tube 12.

[0043] Referring to Figure 5 In some embodiments, the insertion section 10 further comprises a skin 900. For example, the skin 900 can cover the outer peripheral wall of the plurality of segments 200. In some embodiments, the skin 900 also covers at least part of the side wall surface 402 of the distal end seat 400. This embodiment can achieve the sealing performance of the bending tube 12 of the insertion section 10 by the skin 900. Of course, in some embodiments, the skin 900 can also cover the outer peripheral wall of the insertion tube 11.

[0044] Referring to Figures 1 to 4The first pipe structure 100 sequentially penetrates the segments 200 from the proximal end of the insertion portion 10, and the distal end of the first pipe structure 100 communicates with the external space of the insertion portion 10. In an example, the first pipe structure 100 sequentially penetrates at least two segments 200 from the proximal end of the insertion portion 10 along the extension direction of the insertion portion 10. In this embodiment, the first pipe structure 100 can be used to establish a channel for transporting medium. Specifically, the transported medium can be, but is not limited to, liquid, gas, powder, and / or instruments, etc. In addition, the first pipe structure 100 can also provide support for two adjacent segments 200 and realize the relative rotation of the two adjacent segments 200, thereby improving the bending performance of the insertion portion 10. Therefore, this embodiment is beneficial to improve the compactness of the structure of the insertion portion 10 and reduce the size of the insertion portion 10. In addition, in this embodiment, the transport channel formed by the first pipe structure 100 can reduce the deformation amount of the transport channel during the bending of the insertion portion 10, thereby being more beneficial to reduce the resistance of medium transport.

[0045] In some embodiments, the first pipe structure 100 sequentially penetrates each segment 200 from the proximal end of the insertion portion 10 along the extension direction of the insertion portion 10.

[0046] In some embodiments, the first pipe structure 100 sequentially penetrates part of the segments 200 from the proximal end of the insertion portion 10 along the extension direction of the insertion portion 10. Optionally, the insertion portion 10 further comprises a connecting portion 300. The connecting portion 300 is arranged between two adjacent segments 200. Specifically, in the case that there is no first pipe structure 100 between the two adjacent segments 200, the connecting portion 300 can be used to realize the relative bending deflection between the segments 200 by being rotatably connected.

[0047] In some embodiments, in the case that the insertion portion 10 is used for a ureteral flexible scope, the first pipe structure 100 can be used to transport a holmium laser fiber for breaking stones. Of course, in some embodiments, it can also be used to insert a sensor for measuring the pressure in the cavity. For example, a pressure sensor for measuring the pressure in the kidney, such as a pressure guide wire.

[0048] In some embodiments, with reference to Figure 14 The segment 200 has a mounting cavity 201. In an example, the mounting cavity 201 of the segment 200 can provide a mounting space for other components of the insertion portion 10. In an example, the mounting cavity 201 can provide a mounting space for the instrument pipe structure 600 and the cable (not shown in the figure).

[0049] In some embodiments, with reference to Figures 3 to 6 and Figure 14The mounting cavity 201 penetrates the segment 200 along the extension direction of the first pipe structure 100. At least part of the first pipe structure 100 is embedded in the cavity wall 210 of the mounting cavity 201. For example, the extension direction of the first pipe structure 100 can be the extension direction of the insertion portion 10. In some embodiments, the extension direction of the insertion portion 10 can be the extension direction of the insertion portion 10 Figure 3 in the direction indicated by the arrow F1.

[0050] Referring to Figure 14 The insertion portion 10 provided by the above embodiments is beneficial to realize that the space of the first pipe structure 100 is shared with the cavity wall 210 of the insertion portion 10, which is beneficial to reduce the radial dimension of the insertion portion 10 and improve the reliability of the connection between the first pipe structure 100 and the segment 200.

[0051] In some embodiments, the segment 200 can be formed by injection molding. For example, the first pipe structure 100 can be pre-embedded in an injection mold, so that the first pipe structure 100 can be connected to the segments 200 by injection molding. For example, the injection-molded part at least partially wraps the outer periphery of the first pipe structure 100.

[0052] Referring to Figures 4 to 6 In some embodiments, the distal end of the first pipe structure 100 penetrates the distal end surface 401 of the insertion portion 10. This embodiment is beneficial to deliver the medium to the distal end of the insertion portion 10 through the first pipe structure 100. Specifically, this embodiment can be used in an endoscope that needs to deliver the medium to the front of the distal end surface 401 of the insertion portion 10 through the insertion portion 10.

[0053] In some embodiments, the distal end of the first pipe structure 100 penetrates the side wall surface 402 of the insertion portion 10. This embodiment can be used in an endoscope that needs to deliver the medium to the side wall of the insertion portion 10 through the insertion portion 10 or does not need to deliver the medium to the front of the distal end surface 401 of the insertion portion 10. This is beneficial to avoid the camera assembly 500 arranged at the distal end of the insertion portion 10, and thus beneficial to reduce the radial dimension of the distal end of the insertion portion 10. For example, in the case that the insertion portion 10 is used for a ureteral soft mirror, the first pipe structure 100 can be used to deliver a pressure sensor, so that the pressure sensor can avoid the irrigation fluid irrigated by the distal end surface 401, and thus beneficial to reduce the influence of the fluid flow rate on the pressure measurement and improve the measurement accuracy.

[0054] In some embodiments, the distal end of the first tube structure 100 penetrates through the distal end face 401 and the side wall face 402 of the insertion portion 10. This embodiment can not only realize the delivery of the medium to the front of the distal end face 401 of the insertion portion 10, but also is beneficial to the exposure of the medium on the side wall face 402 of the insertion portion 10. For example, in the case of the ureteral flexible scope, the first tube structure 100 is used to deliver the pressure sensor, which can not only avoid the flowing fluid in front of the distal end face 401 of the insertion portion 10, but also is beneficial to ensuring that the position pressure value of the pressure sensor located on the side wall face 402 of the insertion portion 10 is closer to the fluid pressure value in front of the distal end face 401 of the insertion portion 10, thereby being beneficial to improving the accuracy of pressure detection.

[0055] In some embodiments, referring to Figures 14 to 17 , the distance between the first tube structure 100 and the inner side of the cavity wall 210 of the mounting cavity 201 is greater than the distance between the first tube structure 100 and the outer side of the cavity wall 210 of the mounting cavity 201. This embodiment is beneficial to arranging the first tube structure 100 closer to the outer peripheral wall of the insertion portion 10, thereby being beneficial to the miniaturization of the insertion portion 10 or providing more space for other components of the insertion portion 10. For example, in the case of the same outer diameter of the insertion portion 10, arranging the first tube structure 100 closer to the outer peripheral wall of the insertion portion 10 is more beneficial to increasing the space inside the insertion portion 10. Specifically, it can provide mounting space for mounting a larger instrument tube structure 600. In some optional embodiments, the outer peripheral wall of the first tube structure 100 is tangent to the outer peripheral wall of the segment 200, so as to further improve the compactness of the internal structure of the insertion portion 10, thereby being beneficial to reducing the radial dimension of the insertion portion 10.

[0056] Referring to Figures 16 to 18 , the outer peripheral wall of the segment 200 is provided with a mounting groove 202. The first tube structure 100 is embedded in the mounting groove 202. In some embodiments, the first tube structure 100 can protrude from at least part of the outer peripheral wall of the segment 200, so as to reserve more space inside the segment 200.

[0057] In some embodiments, the first tube structure 100 is embedded in the mounting groove 202, and the first tube structure 100 does not protrude from the outer peripheral wall of the segment 200. In this way, it is beneficial to making the cross section of the insertion portion 10 perpendicular to the extension direction circular, thereby improving the compactness of the structure of the insertion portion 10.

[0058] In some embodiments, the segment 200 is injection molded on the first pipe structure 100. In some embodiments, the segment 200 is welded to the first pipe structure 100. The welding here can be a glue or hot melt connection between non-metal structures, or between a non-metal structure and a metal structure, or a welding between metal structures. Specifically, a mounting groove 202 can be prepared in advance on the segment 200, and then the first pipe structure 100 is assembled into the mounting groove 202. In some embodiments, the first pipe structure 100 can also be pre-assembled into the mounting groove 202 of the segment 200 during the preparation of the segment 200.

[0059] In some embodiments, the insertion part 10 includes two first pipe structures 100. The two first pipe structures 100 are arranged on opposite sides of the segment 200, and the distal end of at least one of the two first pipe structures 100 communicates with the external space of the insertion part 10. In some embodiments, the distal end of each of the two first pipe structures 100 communicates with the external space of the insertion part 10 to provide two medium conveying channels.

[0060] Referring to Figure 7 , Figure 8 and Figure 21 , the insertion part 10 further includes a connecting part 300. The connecting part 300 is arranged between and connects two adjacent segments 200, and the connecting part 300 is located on the two sides of the first pipe structure 100 radially opposite the segment 200. The two connected segments 200 can be supported relative rotation between the first pipe structure 100 and the connecting part 300 to achieve bending of the insertion part 10. For example, the connecting part 300 can be a rotating connection structure, or a structure that can be bent and deformed. The rotating connection structure can be, but is not limited to, an integral cutting formed rotating connection structure, or a riveting formed shaft hole matched rotating connection structure.

[0061] Referring to Figure 7 and Figure 8 , the connecting part 300 can be an integral structure with the segment 200. Specifically, the connecting part 300 is bent and deformed by reducing the cross section of the connecting part 300, so that the two adjacent segments 200 can be supported and deflected around the connecting part 300 to bend.

[0062] In some embodiments, referring to Figure 8 and Figure 12 , the first pipe structure 100 includes a spring pipe that sequentially penetrates the segment 200. In this embodiment, the two adjacent segments 200 can be bent and deformed to achieve relative rotation and bending by the spring pipe.

[0063] In some embodiments, referring to Figure 22The first pipe structure 100 includes a support structure 110 and a channel pipe 120. The support structure 110 and the channel pipe 120 are nested. For example, the support structure 110 can be a spring pipe. In some embodiments, the support structure 110 is nested in the outer peripheral wall of the channel pipe 120 to improve the smoothness of the medium transport in the first pipe structure 100.

[0064] In some embodiments, referring to Figure 1 and Figure 2 The insertion part 10 further includes a traction rope 800 and a sleeve 700. For example, as shown in Figure 3 , the traction rope 800 sequentially penetrates the segments 200 and movably cooperates with at least some of the segments 200 along the extension direction of the insertion part 10. For example, as shown in Figure 17 and Figure 18 , the segments 200 are provided with mounting holes 203. Optionally, the mounting holes 203 penetrate the segments 200 along the arrangement direction of the segments 200. The traction rope 800 penetrates the segments 200 along the mounting holes 203 and movably cooperates with the segments 200, so that the traction rope 800 can slide along the mounting holes 203 relative to at least some of the segments 200. The distal end of the traction rope 800 is fixedly connected to the distal end of the segment 200 or the insertion part 10. For example, in the case that the curved pipe 12 has multiple independently bendable segments, the distal end of the traction rope 800 can be fixedly connected to the distal end of a certain independently bendable segment of the curved pipe 12. In some embodiments, the distal end of the traction rope 800 can be fixedly connected to the distal end of the insertion part 10.

[0065] Referring to Figure 2 , the sleeve 700 is nested on the traction rope 800 and connected to a segment 200 adjacent to the proximal end of the insertion part 10. The traction rope 800 is distributed on one side or opposite sides of the insertion part 10 along a first radial direction, and the first pipe structure 100 is distributed on one side or opposite sides of the insertion part 10 along a second radial direction, the first radial direction being perpendicular to the second radial direction. For example, in the case that the curved pipe 12 has multiple independently bendable segments, the distal end of the sleeve 700 can be connected to a segment 200 adjacent to the proximal end of a certain independently bendable segment of the curved pipe 12.

[0066] In the above embodiments, the curved pipe 12 of the insertion part 10 can be bent under the driving of the traction rope 800.

[0067] In some embodiments, referring to Figure 6The insertion portion 10 further comprises a front end seat 400. The front end seat 400 is connected to the segment 200 adjacent to the distal end of the insertion portion 10. In an example, the front end seat 400 is arranged on the segment 200 at the distal end of the curved tube 12. The first tube structure 100 has a first tube segment 130 and a second tube segment 140 connected to the proximal end of the first tube segment 130. In an example, the first tube segment 130 and the second tube segment 140 can be arranged separately. In an example, the first tube segment 130 can be formed by the front end seat 400. Specifically, the first tube segment 130 can be formed by a hole in the front end seat 400. The proximal end of the first tube segment 130 is connected to the distal end of the second tube segment 140, and a stepped hole is arranged at the proximal end of the first tube segment 130 to eliminate the step at the interface of the inner walls of the first tube segment 130 and the second tube segment 140. In some embodiments, the second tube segment 140 is a spring tube.

[0068] In some embodiments, the first tube segment 130 and the second tube segment 140 are an integral structure. Specifically, the first tube segment 130 is the part arranged in the front end seat 400, and the second tube segment 140 is the part arranged through the curved tube 12. In this way, the step at the inner wall of the first tube structure 100 can be avoided.

[0069] In some embodiments, the distal end of the first tube segment 130 extends in a direction perpendicular to the distal end face 401 of the front end seat 400. This is beneficial for the medium to be directly delivered to the front of the front end seat 400 during the delivery of the medium along the first tube structure 100. Specifically, this is beneficial for the instrument to reach the front of the front end seat 400 when the instrument is inserted along the first tube structure 100, and is beneficial for the instrument to fall into the field of view of the camera assembly 500 arranged on the front end seat 400, thereby providing support and guidance for the distal end of the instrument.

[0070] In some embodiments, the second tube segment 140 extends through the segment 200 and extends towards the proximal end of the insertion portion 10 along the extension direction of the insertion portion 10. Referring to Figure 23 and Figure 24 In optional embodiments, the second tube segment 140 can extend through the insertion portion 10 and exit from the handle on the proximal end side of the insertion portion 10, so as to facilitate the delivery of the medium into the first tube structure 100.

[0071] In some embodiments, referring to Figure 2 、 Figure 4 、 Figure 6 and Figure 19 The first tube segment 130 extends through the distal end face 401 of the front end seat 400 and the outer peripheral surface of the front end seat 400. This embodiment can not only reserve space for the delivery of the medium to the distal end of the front end seat 400 and provide guidance, but also is beneficial for reducing the radial space occupied by the first tube structure 100 on the front end seat 400, and is beneficial for the radial size miniaturization of the insertion portion 10.

[0072] In addition, in the case that the first pipe structure 100 is used for inserting the pressure sensor, the pressure sensor can not be completely placed in front of the front end base 400, so as to avoid the pressure sensor from blocking the front view of the front end base 400, and the pressure in front of the front end base 400 can be accurately measured.

[0073] In some embodiments, referring to Figure 4 and Figure 6 , the first pipe segment 130 includes a first sub-segment 131 and a second sub-segment 132 in communication with the proximal end of the first sub-segment 131. The first sub-segment 131 is a groove arranged on the outer circumferential wall of the front end base 400, and the first sub-segment 131 extends to the distal end of the front end base 400 and penetrates the distal end of the front end base 400. The second sub-segment 132 is a through hole arranged on the front end base 400, and the second sub-segment 132 penetrates the proximal end of the front end base 400 and is in communication with the second pipe segment 140.

[0074] For example, the guide direction of the first sub-segment 131 is the extension direction of the front end base 400, so that the delivery medium can be delivered along the extension direction of the front end base 400 under the guidance of the first sub-segment 131. In some embodiments, along the direction from the proximal end of the second sub-segment 132 to the distal end of the second sub-segment 132, the second sub-segment 132 is inclined away from the center of the front end base 400. For example, in the case that the front end base 400 is a columnar structure, along the direction from the proximal end of the second sub-segment 132 to the distal end of the second sub-segment 132, the second sub-segment 132 is inclined away from the axis of the front end base 400.

[0075] In the above embodiments, the curved and inclined arrangement of the second sub-segment 132 can not only better provide a guiding effect for the delivery of the medium, but also avoid other functional components arranged on the front end base 400, such as light sources, camera assemblies 500, etc.

[0076] In some embodiments, as shown in Figure 19 , along the extension direction of the front end base 400, the projection of the first sub-segment 131 on the distal end surface 401 of the front end base 400 is a first projection. The projection of the second sub-segment 132 on the distal end surface 401 of the front end base 400 is a second projection, and the first projection at least partially overlaps the second projection, so as to benefit the delivery of the medium to the front of the front end base 400.

[0077] In some embodiments, referring to Figure 13 , the insertion part 10 further includes an insertion pipe 11. The first pipe structure 100 further has a third pipe segment 150. The third pipe segment 150 is in communication with the proximal end of the second pipe segment 140, and the third pipe segment 150 penetrates the insertion pipe 11. For example, the third pipe segment 150 can be integrally arranged with the second pipe segment 140 or separately arranged. For example, the third pipe segment 150 can be but is not limited to a spring pipe.

[0078] In some embodiments, referring to Figures 2 to 4 , the insertion portion 10 further comprises a camera assembly 500. The camera assembly 500 is arranged at the front end seat 400. Referring to Figure 7 , Figure 8 and Figure 19 , the camera assembly 500 is arranged along a radial direction of the front end seat 400 with the first tube segment 130. In some embodiments, referring to Figure 6 and Figure 8 , along an axial direction of the front end seat 400, a projection of the camera assembly 500 on the distal end face 401 of the front end seat 400 at least partially overlaps with a projection of the first tube structure 100 on the distal end face 401 of the front end seat 400. For example, a projection of the second tube segment 140 and / or the third tube segment 150 on the distal end face 401 of the front end seat 400 at least partially overlaps with a projection of the camera assembly 500 on the distal end face 401 of the front end seat 400. A projection of the first sub-segment 131 on the distal end face 401 of the front end seat 400 is adjacent to or spaced from a projection of the camera assembly 500 on the distal end face 401 of the front end seat 400.

[0079] In the above embodiments, the second sub-segment 132 of the first tube segment 130 can be bent to avoid the camera assembly 500, and the first sub-segment 131 can be arranged in a groove shape, so as to avoid a decrease in the flow area of the distal end of the first tube structure 100 and an increase in the radial dimension of the front end of the insertion portion 10. The flow area is the cross-sectional area of the channel hole of the first tube structure 100 perpendicular to the flow direction of the channel hole.

[0080] In some embodiments, the insertion portion 10 further comprises an instrument tube structure 600. The instrument tube structure 600 is arranged in the mounting cavity 201 along the extension direction of the insertion portion 10, the distal end of the instrument tube structure 600 penetrates the distal end face 401 of the front end seat 400, and the instrument tube structure 600 is located on two sides of the camera assembly 500 opposite to the first tube segment 130.

[0081] In the above embodiments, on the one hand, the gap between the camera assembly 500 and the outer peripheral wall of the front end seat 400 can be fully utilized, and on the other hand, in the case that the sensor is conveyed in the first tube structure 100, the influence of the medium conveyed by the instrument tube structure 600 on the sensor can be reduced, and the detection accuracy of the sensor can be improved.

[0082] On the other hand, the present application also provides an endoscope. For example, the endoscope comprises the insertion portion 10 disclosed in the embodiments of the present application and has the same or similar technical effects. Here, the details are not repeated.

[0083] The endoscope provided by the embodiments of the present application can be a nephroscope, and can also be a bronchoscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a nasoscope, an oral cavity scope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, and the like. The embodiments of the present application do not specifically limit the type of the endoscope. Of course, in some embodiments, the endoscope provided by the present application can also be an industrial endoscope.

[0084] It should be noted that in this document, the terms "comprise", "comprising", or any other variant thereof are intended to cover non-exclusive inclusions, so that processes, methods, articles, or devices that comprise a list of elements do not only include those elements, but also include other elements that are not expressly listed, or further include elements inherent in such processes, methods, articles, or devices. Without more limitations, the element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or device that includes the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but can also include performing functions in a substantially simultaneous manner or in a reverse order according to the functions involved, for example, the described method can be performed in an order different from that described, and various steps can also be added, omitted, or combined. In addition, the features described with reference to certain examples can be combined in other examples.

[0085] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. An insertion portion characterized by, The insertion part can be used for an endoscope, and comprises a first tube structure (100) and a plurality of segments (200). The plurality of segments (200) are arranged in the extension direction of the first tube structure (100) and fixed axially on the first tube structure (100), and two adjacent segments (200) can rotate relative to each other with the first tube structure (100) therebetween to bend the insertion part (10). The first tube structure (100) penetrates the segments (200) in sequence, and the distal end of the first tube structure (100) is in communication with the external space of the insertion part (10).

2. The insert of claim 1, wherein The segment (200) has a mounting cavity (201) penetrating the segment (200) in the extension direction of the first tube structure (100), and at least part of the first tube structure (100) is embedded in the cavity wall (210) of the mounting cavity (201).

3. The insert of claim 2, wherein, The distal end of the first tube structure (100) penetrates the distal end surface of the insertion part (10) and / or the side wall surface of the insertion part (10); and / or, The distance between the first tube structure (100) and the inner side of the cavity wall (210) of the mounting cavity (201) is greater than the distance between the first tube structure (100) and the outer side of the cavity wall (210) of the mounting cavity (201); or, the outer peripheral wall of the first tube structure (100) is tangent to the outer peripheral wall of the segment (200).

4. The insert of claim 2, wherein The outer peripheral wall of the segment (200) is provided with a mounting groove (202), and the first tube structure (100) is embedded in the mounting groove (202), and the first tube structure (100) does not protrude from the outer peripheral wall of the segment (200); And / or, the segment (200) is injection molded on the first tube structure (100), or the segment (200) and the first tube structure (100) are welded and fixed.

5. The insert portion according to any one of claims 1 to 4, characterized in that The insertion part (10) comprises two first tube structures (100), which are arranged on the opposite sides of the segment (200), and the distal end of at least one of the two first tube structures (100) is in communication with the external space of the insertion part (10); Or, the insertion part (10) further comprises a connecting part (300) arranged between and connecting two adjacent segments (200), and the connecting part (300) and the first tube structure (100) are located on the diametrically opposite sides of the segment (200), and the two connected segments (200) can rotate relative to each other with the first tube structure (100) and the connecting part (300) therebetween to bend the insertion part (10); Or, the first tube structure (100) comprises a spring tube which penetrates the segments (200) in sequence; Or, the first tube structure (100) comprises a support structure (110) and a channel tube (120), and the support structure (110) and the channel tube (120) are arranged in a nested manner. Alternatively, the insertion part (10) further comprises a traction rope (800) and a sleeve (700), the traction rope (800) sequentially penetrates the segments (200) and movably cooperates with at least part of the segments (200) along the extension direction of the insertion part (10), the distal end of the traction rope (800) is fixedly connected with the distal end of the segment (200) or the insertion part (10), the sleeve (700) is sleeved on the traction rope (800) and connected with one of the segments (200) adjacent to the proximal end of the insertion part (10), the traction rope (800) is distributed on one side or opposite sides of the insertion part (10) along a first radial direction, and the first pipe structure (100) is distributed on one side or opposite sides of the insertion part (10) along a second radial direction, the first radial direction being perpendicular to the second radial direction.

6. The insert portion according to any one of claims 2 to 4, characterized in that The insertion part (10) further comprises a front end seat (400) connected with the segment (200) adjacent to the distal end of the insertion part (10), the first pipe structure (100) has a first pipe segment (130) and a second pipe segment (140) connected with the proximal end of the first pipe segment (130), the extension direction of the distal end of the first pipe segment (130) is perpendicular to the distal end surface of the front end seat (400), and the second pipe segment (140) penetrates the segment (200) and extends to the proximal end of the insertion part (10) along the extension direction of the insertion part (10).

7. The insert of claim 6, wherein The first pipe segment (130) penetrates the distal end surface of the front end seat (400) and the peripheral surface of the front end seat (400); And / or, the first pipe segment (130) comprises a first sub-segment (131) and a second sub-segment (132) in communication with the proximal end of the first sub-segment (131), the first sub-segment (131) is a groove arranged on the peripheral wall of the front end seat (400), and the first sub-segment (131) extends to the distal end of the front end seat (400) and penetrates the distal end of the front end seat (400), the second sub-segment (132) is a through hole arranged on the front end seat (400), and the second sub-segment (132) penetrates the proximal end of the front end seat (400) and communicates with the second pipe segment (140); And / or, the second pipe segment (140) is a spring pipe; And / or, the insertion part (10) further comprises an insertion pipe (11), and the first pipe structure (100) further has a third pipe segment (150) in communication with the proximal end of the second pipe segment (140), and the third pipe segment (150) penetrates the insertion pipe (11).

8. The insert of claim 7, wherein, The insertion part (10) further comprises a camera assembly (500), the camera assembly (500) is arranged on the front end seat (400), and the camera assembly (500) is arranged along the radial direction of the front end seat (400) with the first pipe segment (130).

9. The insert of claim 8, wherein, The insertion part (10) further comprises an instrument tube structure (600) arranged in the mounting cavity (201) along the extension direction of the insertion part (10), a distal end of the instrument tube structure (600) penetrating through a distal end surface of the front end seat (400), and the instrument tube structure (600) and the first tube segment (130) are located on two sides of the camera assembly (500) in opposite directions.

10. An endoscope characterized by comprising: The insertion part according to any one of claims 1 to 9.

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