Insertion part and endoscope

Abstract

The utility model provides an insertion part and an endoscope, and belongs to the technical field of endoscopes. The insertion part comprises an active bending section and a front end shell, the front end shell is fixed to the far end of the active bending section, guide structure sets are arranged on the two first radial sides of the active bending section, and the active bending section is further provided with installation parts in one-to-one correspondence with the guide structure sets; each guiding structure group comprises a plurality of guiding structures which are arranged in the axial direction of the active bending section, the guiding structures are used for penetrating through traction ropes of the endoscope, the mounting parts are located at the far ends of the corresponding guiding structure groups and are arranged in a deviating mode relative to the arrangement direction of the guiding structures, and the two mounting parts deviate towards the same position of the active bending section; and the mounting parts are used for fixing the traction ropes penetrating through the corresponding guide structure groups. The installation part is arranged in the offset mode relative to the guiding structure set, so that a larger space is reserved in the far-end pipe section of the active bending section to install the instrument pipe, the size of the far end of the instrument pipe is enlarged, and sampling is convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of endoscopes, and in particular relates to an insertion part and an endoscope. Background Art

[0002] As a medical diagnostic instrument, an endoscope can enter the body and take images of the lesion through a camera packaged at the far end, providing doctors with sufficient diagnostic information to treat the disease. The endoscope includes an insertion part, which can enter the body through a human cavity or a surgical incision.

[0003] The insertion part is provided with an instrument tube, a camera module, a light source, etc. Due to the limitation of the size of the insertion part, the size of the instrument tube should not be set too large. Therefore, in the process of sampling using the instrument tube, the sampling operation is limited and the sample is not easy to be moved into the instrument tube. Utility Model Content

[0004] The purpose of the present application is to provide an insertion portion and an endoscope to solve the above-mentioned technical problems existing in the prior art.

[0005] This application is implemented as follows:

[0006] In the first aspect, the present application provides an insertion portion, comprising an active bending section and a front end shell, wherein the front end shell is fixed to the distal end of the active bending section, and guide structure groups are arranged on both sides of the first radial direction of the active bending section, and the active bending section also has a mounting portion arranged in a one-to-one correspondence with the guide structure groups; the guide structure groups each include a plurality of guide structures arranged along the axial direction of the active bending section, the guide structures are used to pass a traction rope of an endoscope, the mounting portion is located at the distal end of the corresponding guide structure group, and is offset relative to the arrangement direction of the plurality of guide structures in the guide structure group, and the two mounting portions are offset toward the same position of the active bending section, and the mounting portion is used to fix the traction rope passed through the corresponding guide structure group.

[0007] In a second aspect, the present application provides an endoscope, comprising the insertion portion provided in the first aspect.

[0008] The technical solution provided by this application can achieve the following beneficial effects:

[0009] In the present application, by setting the mounting portion offset relative to the guide structure group, and setting the two mounting portions offset toward the same position of the active bending section, the distal end of the traction rope inserted in the guide structure can be as close as possible, so as to reserve a larger space in the distal tube section of the active bending section to install the instrument tube, thereby expanding the size of the instrument tube located in the distal end of the active bending section. The expansion of the distal size of the instrument tube is beneficial to the smooth collection of the items to be sampled into the instrument tube during the sampling process; and, in the case of using instruments such as biopsy forceps, it is beneficial to open the biopsy forceps for use, and the opening angle of the biopsy forceps can be expanded; in addition, during the process of negative pressure suction, the instrument tube with an enlarged size is more convenient for the entry of fluids or particles. At the same time, since only the mounting portion is offset, and the guide structure group is still distributed on both sides of the radial direction of the active bending section, the force arm of the traction rope is large during the pulling of the traction rope, which can reduce the driving force required to pull the traction rope. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments of the utility model or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0011] Figure 1 This is a schematic diagram of the structure of the active bending section provided in some embodiments of the present application. Figure 1 ;

[0012] Figure 2 This is a schematic diagram of the structure of the active bending section provided in some embodiments of the present application. Figure 2 ;

[0013] Figure 3 This is a schematic diagram of the structure of the active bending section provided in some embodiments of the present application. Figure 3 ;

[0014] Figure 4 is a schematic diagram of the cooperation between the active bending section and the traction rope provided in some embodiments of the present application;

[0015] Figure 5 This is a schematic diagram of the insertion portion provided in some embodiments of the present application. Figure 1 ;

[0016] Figure 6 is a schematic diagram of the structure of a front end housing provided in some embodiments of the present application;

[0017] Figure 7 is a schematic diagram of the cooperation between the front end shell and the traction rope provided in some embodiments of the present application;

[0018] Figure 8 This is a schematic diagram of the insertion portion provided in some embodiments of the present application. Figure 2 ;

[0019] Fig. 9 This application is about Figure 8 Detail of point A.

[0020] In the figure: 100-active bending section, 110-guiding structure, 120-installing part, 130-distal tube section, 140-connecting section, 141-clamping groove, 200-front end shell, 210-clamping protrusion, 220-first accommodating cavity, 230-second accommodating cavity, 300-traction rope, 400-instrument tube, 500-camera module, 600-light source. DETAILED DESCRIPTION

[0021] The following description provides many different embodiments or examples for implementing different features of the present invention. The components and arrangements described in the following specific examples are only used to simplify the present invention and are only used as examples, not to limit the present invention.

[0022] It should be noted that, in each embodiment of the present application, "proximal end" and "distal end" refer to the position of the endoscope and its accessories relative to the user in the use environment, wherein the end closer to the user is designated as the "proximal end" and the end farther from the user is designated as the "distal end".

[0023] The embodiment of the present application provides an insertion portion, which includes an active bending section 100 and a front end shell 200. The front end shell 200 is located at the distal end of the active bending section 100 and is fixed to the active bending section 100. The active bending section 100 can be bent under the drive of an external driving force, and drive the front end shell 200 and the instrument components installed in the front end shell 200 to move together, so as to cooperate with the doctor to perform intraoperative operations.

[0024] The first radial direction of the active bending section 100 is provided with a guide structure group on both sides. The first radial direction is any radial direction of the active bending section 100, which can be referred to Figure 2 The direction is shown by the dotted line bb in the figure. The guide structure group includes a plurality of guide structures 110 arranged along the axial direction of the active bending section 100. The guide structure 110 is located at the tube wall of the active bending section 100. The guide structure 110 is used to pass the traction rope 300 of the endoscope, limit the traction rope 300, limit the movement range of the traction rope 300 in the radial direction of the active bending section 100, ensure that the traction rope 300 acts on the position of the force point on the active bending section 100, and ensure that the traction rope 300 can move smoothly under the drive of the external driving force. A traction rope 300 is passed through each guide structure group.

[0025] The active bending section 100 also has two mounting portions 120, and the two mounting portions 120 are arranged one by one with the two guide structure groups. The mounting portion 120 is located at the far end of the corresponding guide structure group, and the mounting portion 120 and the multiple guide structures 110 in the guide structure group are not in the same direction, but are offset relative to the arrangement direction of the multiple guide structures 110 in the guide structure group. Figure 1 and Figure 2 As shown. Both groups of mounting parts 120 are offset toward the same position of the active bending section 100, so that the two mounting parts 120 can be close to each other. The mounting parts 120 are used to fix the traction rope 300 passing through the corresponding guide structure group. Since the two mounting parts 120 are close to each other, the parts of the traction rope 300 fixed to the mounting parts 120 are also close to each other. Figure 4 Generally, the distal end of the traction rope 300 is fixed to the mounting portion 120. The distal ends of the two traction ropes 300 are fixed to the corresponding mounting portions 120, and the proximal ends of the traction ropes 300 are located at the handle of the endoscope. By pulling the traction ropes 300, the bending angle and bending direction of the active bending section 100 are controlled.

[0026] Compared with the layout mode in which the distal ends of the two traction ropes 300 are distributed along the first radial direction, the distal ends of the two traction ropes 300 are brought closer to the same position of the active bending section 100, so that a larger space can be reserved inside the distal tube section of the active bending section 100, and the space is used to install the instrument tube 400. Since the size of the space is larger, the size of the instrument tube 400 corresponding to the space can be increased accordingly. The front end shell 200 is fixed at the distal end of the active bending section 100, and the traction rope 300 does not need to be fixed in the front end shell 200. The front end shell 200 has more space to install the instrument tube 400 relative to the active bending section 100. Therefore, the distal end of the instrument tube 400 after the size is enlarged can still be installed in the front end shell 200, which will not affect the layout inside the front end shell 200, or will hardly affect the layout inside the front end shell 200.

[0027] In addition to the instrument tube 400, the front end shell 200 also installs a camera module 500, a light source 600, etc. In some optional embodiments, the mounting portion 120 is offset toward the camera module 500 and the light source 600. Compared with the instrument tube 400, the camera module 500 and the light source 600 require less space. Therefore, the offset of the mounting portion 120 toward the camera module 500 and the light source 600 is beneficial to better utilize the space around the camera module 500 and / or the light source 600, and improve the compactness of the assembly between the components at the far end of the insertion portion. In this way, a larger installation space can be reserved for the instrument tube 400 without affecting the installation of the camera module 500 and the light source 600.

[0028] After the distal end of the instrument tube 400 is enlarged, when sampling is required at the lesion site during the use of the endoscope, the collected sample can more easily enter the instrument tube 400 through the tube opening of the enlarged instrument tube 400, thereby improving the convenience of the sampling operation; and when using instruments such as biopsy forceps that need to be opened for use, due to the enlarged distal end of the instrument tube 400, the opening angle of the biopsy forceps can be larger at the same position in the instrument tube 400, and the biopsy forceps are easier to open, making it easier to use the biopsy forceps. In addition, when negative pressure suction is required at the lesion site, during the suction process, both fluids and solid particles are more likely to enter the enlarged instrument tube 400, thereby improving the efficiency of negative pressure suction.

[0029] In the embodiment of the present application, the traction rope 300 installed in the active bending section 100 is offset only in the position where it is fixed to the active bending section 100, and the other parts pass through the guide structure 110 normally and are limited by the guide structure 110; the instrument tube 400 of the insertion part also has only the size of the distal part enlarged, and the sizes of the other parts remain unchanged to adapt to the space size inside the active bending section 100.

[0030] The active bending section 100 generally includes a plurality of pipe segment units connected in sequence, and two adjacent pipe segment units are rotationally connected and have a rotation gap. By pulling the traction rope 300, the size of the rotation gap on the side where the traction rope 300 is located can be reduced, and the size of the rotation gap on the side away from the traction rope 300 can be expanded, thereby completing the bending of the active bending section 100. The active bending section 100 can be an integrally formed structure, and the pipe wall of the active bending section 100 is cut to form a rotation gap, and a pipe segment unit is formed between two adjacent rotation gaps. The uncut portion of the pipe segment between the two adjacent pipe segment units serves as a pivot structure, and the two adjacent pipe segment units are rotated and matched through the pivot structure. Refer to Figure 1 and Figure 3 As shown. The active bending section 100 can also be a snake-bone structure, with multiple tube segment units being independent of each other, and using a riveted structure as a pivot structure to connect two adjacent tube segment units, and the two adjacent tube segment units are rotated together through the riveted structure. Pivot structure groups are provided on both sides of the second radial direction of the active bending section 100, and each pivot structure group includes multiple pivot structures arranged along the axial direction of the active bending section 100. The second radial direction can be any radial direction of the active bending section 100.

[0031] In some optional embodiments, the guide structure 110 and the pivot structure are sequentially spaced and distributed in the circumferential direction of the active bending section 100. Both mounting portions 120 are offset toward the same position of the active bending section 100, and both mounting portions 120 may be offset toward the side where the same pivot structure is located, so that the forces on both sides of the pivot structure are balanced.

[0032] In some optional embodiments, two adjacent tube segment units are connected by two pivot structures. Exemplarily, the two pivot structures are located on two opposite sides of the second radial direction of the tube segment unit, referring to Figure 2 As shown, the direction indicated by the dotted line cc is the second radial direction. The guiding structure 110 is located on both sides of the first radial direction of the tube segment unit. The second radial direction intersects with the first radial direction. In this way, the force of the traction rope 300 acting on the tube segment unit is located on both sides of the first radial direction, thereby causing two adjacent tube segment units to rotate around the two pivot structures in the second radial direction. In some further preferred embodiments, the first radial direction is perpendicular to the second radial direction, which is beneficial for maximizing the force arm corresponding to the force of the traction rope 300 acting on the tube segment unit, thereby reducing the force of the traction rope 300 to drive the active bending section 100 to bend.

[0033] In some optional embodiments, the tube segment unit at the farthest end of the active bending section 100 is called the distal tube segment 130. The tube segment unit adjacent to the distal tube segment 130 of the active bending section 100 is called the sub-distal tube segment. The distal tube segment 130 is fixed to the front end shell 200 of the endoscope. It should be noted that the distal tube segment 130 is provided with a mounting portion 120, that is, the distal tube segment 130 is connected to the traction rope 300 through the mounting portion 120. Therefore, in some optional embodiments, the distal tube segment 130 does not need to be provided with a guide structure 110 for installing the traction rope 300.

[0034] In some optional embodiments, the distal tube section 130 and the sub-distal tube section are rotated and matched through a pivot structure. Since the distal ends of the two traction ropes 300 are respectively connected to the mounting parts 120 of the distal tube section 130, and the two mounting parts 120 are offset toward the same position of the active bending section 100, the distal end of the traction rope 300 is at least partially offset relative to the extension direction of the active bending section 100. Exemplarily, the two mounting parts 120 are offset toward one of the pivot structures of the distal tube section 130. In this way, the distances between the two pivot structures between the distal tube section 130 and the sub-distal tube section and the force application points of the traction rope 300 are different, and then when different traction ropes 300 are pulled to control the bending of the active bending section 100, the two pivot structures between the distal tube section 130 and the sub-distal tube section are subjected to different forces. Specifically, the pivot structure closer to the two traction ropes 300 is subjected to a larger overall force, and the pivot structure away from the two traction ropes 300 is subjected to a smaller overall force. In this case, if the traction rope 300 is pulled multiple times, one of the two pivot structures between the distal tube segment 130 and the sub-distal tube segment that is subjected to a larger force is easily damaged, thereby affecting the bending use of the active bending section 100 .

[0035] In some embodiments of the present application, the range of the two guide structure groups is expanded to the distal pipe section 130, and the two guide structure groups are provided with a guide structure 110 at the distal pipe section 130 to limit the position of the traction rope 300, referring to Figure 3 As shown. That is, the distal pipe section 130 is provided with two guide structures 110, and the two guide structures 110 belong to two guide structure groups respectively, so that the traction rope 300 between the distal pipe section 130 and the sub-distal pipe section is located on both sides of the first radial direction respectively. With such a layout, the overall force of the two pivot structures between the distal pipe section 130 and the sub-distal pipe section can be as balanced as possible, avoiding the situation where the unilateral pivot structure is damaged prematurely due to uneven force, and extending the service life of the active bending section 100.

[0036] In some preferred embodiments of the present application, the first radial direction and the second radial direction of the active bending section 100 are perpendicular to each other. Figure 2 In this arrangement, when the traction rope 300 is driven to bend, no matter which side the active bending section 100 bends, the two pivot structures between the distal tube section 130 and the sub-distal tube section are balanced in force, further avoiding a difference in force between the two pivot structures and protecting the structural integrity of the pivot structure between the distal tube section 130 and the sub-distal tube section.

[0037] The mounting portion 120 fixes the traction rope 300. In some embodiments of the present application, the mounting portion 120 and the traction rope 300 may be fixed by adhesive fixation, welding fixation, or other fixing methods. In order to further increase the free space in the active bending section 100, the mounting portion 120 is set as a groove structure located on the tube wall of the active bending section 100. Figure 1 and Figure 2 As shown, the groove structure can be used to accommodate the traction rope 300, so as to prevent the traction rope 300 from occupying the space in the active bending section 100. In addition, the welding points can be concentrated in the groove structure of the mounting portion 120, so as to prevent the welding points from occupying the internal space of the active bending section 100.

[0038] There are many ways to fix the active bending section 100 and the front end shell 200, which can be one or more of the various fixing methods such as welding, gluing, clamping, plugging, etc. In some embodiments of the present application, a connecting section 140 is provided at the distal end of the active bending section 100 along its axial protrusion, and the connecting section 140 is used to be inserted into the interior of the front end shell 200, and the front end shell 200 is fixedly sleeved outside the connecting section 140. The connecting section 140 can increase the contact area between the active bending section 100 and the front end shell 200, and improve the connection stability between the two. In addition, in some preferred embodiments, the connecting section 140 can be a protruding structure made of a metal material, and the structural strength of the metal material is high. The connecting section 140 is inserted into the front end shell 200. For the front end shell 200 formed by injection molding, the structural strength of the portion where the front end shell 200 and the connecting section 140 are connected can be increased.

[0039] In some embodiments, the connecting section 140 may be an annular structure, and the overall structural strength of the annular structure is high, which can increase the structural strength and connection stability of the connecting position between the connecting section 140 and the front end shell 200. In other embodiments, the connecting section 140 may be an annular structure with a snap-fit ​​groove 141, and the distal end of the connecting section 140 has two snap-fit ​​grooves 141 extending along its axial direction, and the depth of the snap-fit ​​groove 141 may be the same as the axial length of the connecting section 140, dividing the connecting section 140 into two parts, and the depth of the snap-fit ​​groove 141 may also be less than the axial length of the connecting section 140, so that the partial structures of the connecting section 140 are always connected together, ensuring the structural strength of the connecting section 140.

[0040] The tube wall of the front end shell 200 has two clamping protrusions 210 protruding toward the inside thereof, and the two clamping protrusions 210 correspond to the two clamping recesses one by one. When the front end shell 200 is sleeved outside the connecting section 140, the clamping protrusions 210 on the tube wall of the front end shell 200 are clamped in the corresponding clamping grooves 141. Figure 5 As shown. The cooperation of the snap-in protrusion 210 and the snap-in groove 141 can position and install the front end shell 200 during the process of assembling the front end shell 200 and the active bending section 100, so that the front end shell 200 and the active bending section 100 can be assembled according to the preset position, thereby improving the convenience of assembly. The snap-in protrusion 210 is located on the tube wall of the front end shell 200, which can increase the structural strength of the front end shell 200 to a certain extent, and the snap-in protrusion 210 of the protruding arrangement is snapped into the snap-in groove 141, and the snap-in protrusion 210 does not occupy the space in the active bending section 100 for installing the instrument tube 400. In some preferred embodiments, the snap-in protrusion 210 is located on the bending direction side of the active bending section 100, and the snap-in protrusion 210 can increase the strength and rigidity of the front end shell 200 on both sides of the bending deflection of the active bending section 100.

[0041] In some embodiments of the present application, the front end shell 200 has a first accommodating cavity 220 inside, and the first accommodating cavity 220 is used to install the instrument tube 400. Along the radial direction of the front end shell 200, the clamping protrusion 210 is arranged to protrude toward the first accommodating cavity 220, so that the clamping protrusion 210 protrudes from the inner wall surface of the connecting section 140. The protruding clamping protrusion 210 will occupy part of the space of the first accommodating cavity 220, and cooperate with the instrument tube 400 installed in the first accommodating cavity 220 to limit the position of the instrument tube 400, fix the position of the instrument tube 400 in the front end shell 200, and improve the restraint force of the front end shell 200 on the instrument tube 400. In this way, the instrument tube 400 can be installed inside the insertion part according to the preset position as a whole, avoiding the deviation of the instrument tube 400 in the middle, resulting in changes in the space inside the instrument tube 400, affecting the passage of the instrument in the instrument tube 400, and affecting the operation of the doctor.

[0042] In some preferred embodiments, the mounting portion 120 and the clamping protrusion 210 are arranged one by one, and the mounting portion 120 and the corresponding clamping protrusion 210 are arranged along the axial direction of the active bending section 100. Figure 7 As shown, the traction rope 300 is located in the avoidance space provided by the clamping protrusion 210, so as to prevent the connection structure between the traction rope 300 and the mounting portion 120 from affecting the arrangement of the instrument tube 400.

[0043] There are two clamping protrusions 210 . On the one hand, they are arranged one-to-one with the mounting portion 120 . On the other hand, they can limit the position of the instrument tube 400 on both sides of the instrument tube 400 , thereby improving the limiting effect of the instrument tube 400 .

[0044] In some embodiments of the present application, the front end housing 200 further has a second accommodating cavity 230 inside, and the second accommodating cavity 230 is used to install the camera module 500, and the pipeline of the camera module 500 is arranged in the second accommodating cavity 230. The second accommodating cavity 230 and the first accommodating cavity 220 are arranged along the radial direction of the front end housing 200, referring to Figure 6As shown, the space inside the front end shell 200 is reasonably arranged. Along the direction from the first accommodating cavity 220 to the second accommodating cavity 230, the wall thickness of the clamping protrusion 210 gradually increases. Near the first accommodating cavity 220, the wall thickness of the clamping protrusion 210 is smaller, so that the clamping protrusion 210 occupies as little space of the instrument tube 400 as possible, and enough space is reserved in the front end shell 200 to install the instrument tube 400. Near the second accommodating cavity 230, the wall thickness of the clamping protrusion 210 is thicker, so that the clamping protrusion 210 can protrude as much as possible toward the inside of the front end shell 200, increase the contact area between the clamping protrusion 210 and the instrument tube 400, and improve the limiting effect of the instrument tube 400. At the same time, the instrument tube 400 is generally arranged toward one side of the front end shell 200, and more space is reserved for the other side, which is convenient for installing the camera module 500, etc. The clamping protrusion 210 is located in the space between the instrument tube 400 and the camera module 500. Even if the thickness of the clamping protrusion 210 increases, it will not affect the installation of the camera module 500. Figure 8 and Fig. 9 As shown, the instrument tube 400 is disposed toward one side of the front end shell 200 , the camera module 500 is disposed toward the other side of the front end shell 200 , and the light source 600 is installed in the remaining space in the front end shell 200 .

[0045] In some preferred embodiments, the inner surface of the clamping protrusion 210 is an arc surface, which abuts against the outer wall of the instrument tube 400. The arc surface can increase the contact area between the clamping protrusion 210 and the instrument tube 400, avoiding the situation where the instrument tube 400 is subjected to concentrated force. The arc surface can cooperate with the inner wall of the connecting section 140 to stop the instrument tube 400 between the connecting section 140 of the active bending section 100 and the clamping protrusion 210, thereby improving the assembly stability of the instrument tube 400 and the front end shell 200, improving the binding force of the front end shell 200 and the active bending section 100 on the instrument tube 400, and stabilizing the position of the instrument tube 400.

[0046] The clamping protrusion 210 and the mounting portion 120 are arranged along the axial direction of the active bending section 100. Since the extension range of the clamping protrusion 210 is relatively large, only a part of the clamping protrusion 210 is arranged corresponding to the mounting portion 120. In order to further reduce the impact that the traction rope 300 may have on the instrument tube 400, the portion of the clamping protrusion 210 corresponding to the mounting portion 120 along the axial direction of the active bending section 100 is arranged close to the second accommodating cavity 230. In other words, the portion of the clamping protrusion 210 corresponding to the mounting portion 120 is the side of the clamping protrusion 210 with a thicker wall thickness. Figure 7 As shown, a larger avoidance space is provided for the connection position of the traction rope 300 and the mounting portion 120, thereby further reducing the friction between the traction rope 300 and the active bending section 100 and / or the instrument tube 400, and avoiding structural damage to the traction rope 300.

[0047] The embodiment of the present application also provides an endoscope, including the insertion portion provided by any of the above embodiments. The endoscope of the embodiment of the present application can be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, an enteroscope, an otoscope, a rhinoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc. The embodiment of the present application does not specifically limit the type of the endoscope.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An insertion portion, characterized in that: The invention comprises an active bending section (100) and a front end shell (200), wherein the front end shell (200) is fixed to the distal end of the active bending section (100), guide structure groups are arranged on both sides of the first radial direction of the active bending section (100), and the active bending section (100) further comprises a mounting portion (120) arranged in one-to-one correspondence with the guide structure groups; The guide structure groups each comprise a plurality of guide structures (110) arranged axially along the active bending section (100), the guide structures (110) being used to pass a traction rope (300) of an endoscope, the mounting portion (120) being located at the distal end of the corresponding guide structure group, being offset relative to the arrangement direction of the plurality of guide structures (110) in the guide structure group, and both of the two mounting portions (120) being offset towards the same position of the active bending section (100), and the mounting portion (120) being used to fix the traction rope (300) passed through the corresponding guide structure group.

2. An insertion portion according to claim 1, characterized in that: The distal end of the active bending section (100) has a distal tube section (130), the distal tube section (130) is fixed to the front end shell (200) of the endoscope, the two mounting portions (120) are both arranged on the distal tube section (130), and the two guide structure groups both have guide structures (110) arranged on the distal tube section (130); And / or, the mounting portion (120) is a groove structure arranged on the tube wall of the active bending section (100).

3. An insertion portion according to claim 2, characterized in that: A pivot structure group is provided on both sides of the second radial direction of the active bending section (100), and the pivot structure group comprises a plurality of pivot structures arranged along the axial direction of the active bending section (100), and the first radial direction is arranged perpendicular to the second radial direction.

4. An insertion portion according to claim 1, characterized in that: The distal end of the active bending section (100) has a connecting section (140) protruding along its axial direction, and the front end shell (200) is fixedly sleeved outside the connecting section (140).

5. An insertion portion according to claim 4, characterized in that: The distal end of the connecting section (140) has two clamping grooves (141) extending along its axial direction, and the tube wall of the front end shell (200) has two clamping protrusions (210) protruding toward the inside thereof, the two clamping protrusions (210) correspond to the two clamping grooves (141) one by one, and the clamping protrusions (210) are clamped in the corresponding clamping grooves (141); And / or, the connecting section (140) is a protruding structure made of metal material.

6. An insertion portion according to claim 5, characterized in that: The front end shell (200) has a first accommodating cavity (220) for installing an instrument tube (400). Along the radial direction of the front end shell (200), the snap-fit ​​protrusion (210) is arranged to protrude toward the first accommodating cavity (220) so as to protrude relative to the inner wall of the connecting section (140). The snap-fit ​​protrusion (210) can be stop-fitted with the instrument tube (400) installed in the first accommodating cavity (220).

7. An insertion portion according to claim 6, characterized in that: The front end shell (200) further comprises a second accommodating cavity (230) for installing the camera module (500), and the second accommodating cavity (230) and the first accommodating cavity (220) are arranged along the radial direction of the front end shell (200); Along the direction from the first accommodating cavity (220) to the second accommodating cavity (230), the wall thickness of the clamping protrusion (210) gradually increases.

8. An insertion portion according to claim 7, characterized in that: The two clamping protrusions (210) correspond one-to-one to the two mounting portions (120), and the mounting portions (120) and the corresponding clamping protrusions (210) are arranged along the axial direction of the active bending section (100).

9. An insertion portion according to claim 8, characterized in that: Along the axial direction of the active bending section (100), a portion of the mounting portion (120) corresponding to the clamping protrusion (210) is arranged close to the second accommodating cavity (230).

10. An endoscope, characterized in that: Comprising the insertion part according to any one of claims 1-9.

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