Insertion part and endoscope

Abstract

The invention discloses an insertion part and an endoscope, and relates to the technical field of medical instruments.The insertion part comprises a first section and a second section, the far end of the first section is provided with a front end assembly, the second section is connected with the near end of the first section, the cross section area of the first section is larger than that of the second section, and the first section and the second section are coaxial; the insertion part further comprises a channel penetrating through the first section and the second section. The cross section area of the first section is larger than that of the second section, and the first section and the second section are coaxial. When the insertion part is inserted into the sheath tube, at least part of the first section and the sheath tube abut against each other, and the axis of the first section and the sheath tube are roughly coaxial. At the moment, the second section is biased relative to the sheathing canal, namely, the space on one side between the second section and the sheathing canal is relatively larger, so that the second section has better trafficability and is beneficial to smoothly removing substances waiting for stone removal, and the problem that stone removal is not smooth when the insertion part is in the sheathing canal is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to an insertion portion and an endoscope. Background Art

[0002] Guide sheaths and endoscopes are high-precision medical devices specially designed and widely used in the field of urinary system inspection and treatment. As an auxiliary tool, the guide sheath is usually used to guide the endoscope or other medical devices into the urinary system to ensure the accuracy and safety of the operation. Its design fully considers the physiological structure of the human urinary system, can effectively reduce trauma and complications during surgery, and improve the success rate of surgery and the speed of patient recovery.

[0003] When using a guide sheath and an endoscope to remove kidney stones, the guide sheath can be placed into the kidney using a guide wire, and then the insertion portion of the endoscope can be inserted into the sheath to observe and break the stones. After the stones are broken, the sheath can be used to provide a negative pressure environment to suck the stones into the gap between the sheath and the insertion portion, thereby expelling the stones. However, the position of the insertion portion in the sheath is uncertain, and the insertion portion will prevent the stones from passing through the gap, which can easily lead to problems with unsmooth stone removal. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the related art, the present application provides an insertion portion and an endoscope to solve the above-mentioned technical problems.

[0005] The present application provides an insertion portion of an endoscope, the insertion portion comprising a first section and a second section, the distal end of the first section being provided with a front end assembly, the second section being connected to the proximal end of the first section, the cross-sectional area of ​​the first section being larger than that of the second section, and the first section and the second section being coaxial, the insertion portion further comprising a channel penetrating the first section and the second section.

[0006] In one embodiment of the present application, one side of the first section and one side of the second section are flush with each other.

[0007] In one embodiment of the present application, the second section includes a first surface and a second surface opposite to each other; The first surface is flush with a partial surface of the first section, and / or the second surface is recessed in a direction close to the first surface.

[0008] In one embodiment of the present application, the first section is provided with a first tube section of an instrument tube, the distal end of the first section is configured as a slope, the slope is inclined relative to the axis of the first section, and the insertion portion has a first side and a second side that are far away from each other, the axis of the second section is located on the first side of the axis of the first section, and the slope is formed on the surface of the first section close to the second side.

[0009] In one embodiment of the present application, the front end component includes a camera module, which is located at the distal end of the first section. The second section is provided with a second pipe section. The first pipe section and the second pipe section are connected to form a channel. The camera module and the second pipe section are distributed along the axis of the insertion part, and the first pipe section is located on the second side of the camera module.

[0010] In one embodiment of the present application, the first section is provided with a first tube section of the instrument tube and a camera module, the insertion portion has a first side and a second side that are far away from each other, the axis of the second section is located on the first side of the axis of the first section, the camera module is located on the second side of the first tube section, the second section is provided with a second tube section, and the second tube section is connected to the first tube section.

[0011] In one embodiment of the present application, the first section and / or the second section further has a limiting surface, and the limiting surface is used to abut against the limiting structure of the sheath tube to constrain the insertion portion inserted into the sheath tube.

[0012] In one embodiment of the present application, the limiting surface has a first limiting surface and a second limiting surface, and the first limiting surface and the second limiting surface are respectively arranged on opposite sides of the first section and / or the second section, and the second section includes a first part and a second part, and the first part and the second part are respectively arranged on opposite sides of the line between the first limiting surface and the second limiting surface, and the cross-sectional area of ​​the first part is larger than that of the second part.

[0013] In an embodiment of the present application, the insertion portion is configured as a structure bent toward at least two different radial directions.

[0014] To achieve the above-mentioned purpose and other related purposes, the present application provides an endoscope, including the aforementioned insertion portion.

[0015] The technical solution adopted by the present invention can achieve the following beneficial effects: the cross-sectional area of ​​the first section is larger than that of the second section, and the first section and the second section are out of axis. When the insertion portion is inserted into the sheath, the first section and the sheath are at least partially in contact, so that the axis of the first section and the sheath are roughly coaxial. At this time, the second section is offset relative to the sheath, that is, the space on one side between the second section and the sheath is relatively larger, which has better passability, is conducive to the smooth removal of stones waiting to be removed, and solves the problem of unsmooth stone removal when the insertion portion is in the sheath. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1is a schematic structural diagram of an insertion portion shown in an exemplary embodiment of the present application; Figure 2 is a schematic structural diagram of an insertion portion from another perspective shown in an exemplary embodiment of the present application; Figure 3 is a cross-sectional view of an insertion portion shown in an exemplary embodiment of the present application; Figure 4 is a schematic diagram of the structure of the first and second sections shown in an exemplary embodiment of the present application; Figure 5 is a structural schematic diagram of another first section and a second section shown in an exemplary embodiment of the present application; Figure 6 is a schematic diagram of the structure of the second section shown in an exemplary embodiment of the present application; Figure 7 is a cross-sectional view of another insertion portion shown in an exemplary embodiment of the present application; Figure 8 is a schematic structural diagram of the first section and the sheath tube shown in an exemplary embodiment of the present application; Fig. 9 is a schematic structural diagram of the second section and the sheath tube shown in an exemplary embodiment of the present application; Fig.10 is a schematic structural diagram of another insertion portion shown in an exemplary embodiment of the present application; Fig.11 It is a schematic diagram of the structure of an endoscope shown in an exemplary embodiment of the present application.

[0018] In the figure: 1. endoscope; 100. insertion part; 110. first section; 111. first tube section; 112. inclined surface; 113. front end assembly; 114. channel; 120. second section; 121. first surface; 122. second surface; 123. second tube section; 124. first part; 125. second part; 130. first side; 140. second side; 150. limiting surface; 151. first limiting surface; 152. second limiting surface; 2. sheath; 210. limiting structure. DETAILED DESCRIPTION

[0019] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0020] The terms "first", "second", etc. 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 interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0021] In each embodiment of the present application, "proximal end" and "distal end" refer to the position of each component 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".

[0022] Guide sheaths and endoscopes are high-precision medical devices specially designed and widely used in the field of urinary system inspection and treatment. As an auxiliary tool, the guide sheath is usually used to guide the endoscope or other medical devices into the urinary system to ensure the accuracy and safety of the operation. Its design fully considers the physiological structure of the human urinary system, can effectively reduce trauma and complications during surgery, and improve the success rate of surgery and the speed of patient recovery.

[0023] When using a guide sheath and an endoscope to remove kidney stones, the guide sheath can be placed into the kidney using a guide wire, and then the insertion portion of the endoscope can be inserted into the sheath to observe and break the stones. After the stones are broken, the sheath can be used to provide a negative pressure environment to suck the stones into the gap between the sheath and the insertion portion, thereby expelling the stones. However, the position of the insertion portion in the sheath is uncertain, and the insertion portion will prevent the stones from passing through the gap, which can easily lead to problems with unsmooth stone removal.

[0024] The present application provides an insertion portion 100 of an endoscope 1, which is referred to as the insertion portion 100 hereinafter. Figure 1 The insertion portion 100 can be used to be inserted into a human body cavity or sheath tube 2, which is not limited here.

[0025] Please continue reading Figure 1 The insertion portion 100 may include a first section 110 and a second section 120, and the second section 120 is connected to the proximal end of the first section 110. For example, the first section 110 may be an active bending section, and the second section 120 may be a passive bending section, etc., which is not limited in this embodiment. The medical staff may operate the operating end of the endoscope 1 to control the first section 110 to bend in a designated direction around.

[0026] The distal end of the first section 110 is provided with a front end assembly 113, which may include a camera module. Under the control of medical personnel, the first section 110 can be rotated to a specified direction, and the camera module can obtain an image signal at a specified position, so that the medical personnel can observe and control the device to perform treatment operations.

[0027] See also Figure 2 , the cross-sectional area of ​​the first section 110 is greater than that of the second section 120, and the first section 110 and the second section 120 are off-axis. The off-axis setting may be that the axes of the first section 110 and the second section 120 are parallel or intersecting. For example, the axis of the first section 110 is as follows: Figure 2 As shown in L1 in FIG. 1 , the axis of the second section 120 is as shown in FIG. Figure 2 As shown in L2 in the figure, the axis of the first section 110 is not colinear with the axis of the second section 120. When the insertion part 100 is inserted into the sheath tube 2, the first section 110 and the sheath tube 2 are at least partially in contact with each other, so that the axis of the first section 110 and the sheath tube 2 are roughly coaxial. At this time, because the first section 110 and the second section 120 are out of axis, the second section 120 is offset relative to the sheath tube 2, that is, the space on one side between the second section 120 and the sheath tube 2 is relatively larger, which has better passability, is conducive to the smooth removal of stones waiting to be removed, and solves the problem of unsmooth stone removal when the insertion part 100 is in the sheath tube 2.

[0028] It is understandable that the outer diameter of the first section 110 is substantially equal to the inner diameter of the sheath tube 2, and the first section 110 can fit with the inner wall of the sheath tube 2 so that the axis of the first section 110 is coaxial with the sheath tube 2. When the outer diameter of the first section 110 is slightly smaller than the inner diameter of the sheath tube 2, the first section 110 can fit with part of the inner wall of the sheath tube 2, and the axis of the first section 110 is substantially coaxial with the sheath tube 2, and then the second section 120 is offset relative to the sheath tube 2, and then a larger space is formed on one side of the second section 120.

[0029] In addition, see Figure 3 The insertion portion 100 may further include a channel 114 that runs through the first section 110 and the second section 120. The channel 114 runs through opposite ends of the insertion portion 100, and the channel 114 is used to insert instruments, such as biopsy forceps, lasers, etc., and / or, the channel 114 is used to inject media, such as saline, distilled water, etc. Exemplarily, in minimally invasive surgery, the channel 114 can guide surgical forceps into the body. Moreover, the channel 114 can simultaneously inject saline into the body. In this embodiment, the shape and purpose of the channel 114 are not limited.

[0030] In this embodiment, if Figure 2As shown, one side of the first section 110 and the second section 120 are flush with each other. In other words, a portion of the surface of the second section 120 is on the same plane as a portion of the surface of the first section 110. Exemplarily, a portion of the surface of the first section 110 that is flush with the second section 120 is in contact with the inner wall of the sheath 2, and one side of the second section 120 can also be in contact with the inner wall of the sheath 2, and the space size on the other side of the second section 120 increases accordingly. This arrangement can facilitate the smooth removal of stones waiting to be removed, and solves the problem of unsmooth stone removal when the insertion portion 100 is in the sheath 2.

[0031] For further information, see Figure 4 , Figure 4 The dotted line in the figure shows the outer contour of the second section 120. The second section 120 includes a first surface 121 and a second surface 122 facing each other. For example, the first surface 121 and the second surface 122 may be two curved surfaces facing each other. The area ratio and specific shape of the first surface 121 and the second surface 122 may be selected or designed according to specific implementation scenarios and requirements, and this implementation does not limit this. The first surface 121 may be flush with a portion of the surface of the first section 110. Figure 4 As shown, in the front view of the insertion portion 100, Figure 4 The first surface 121 is flush with a part of the surface of the first section 110. The flush setting can increase the distance between the second surface 122 and the inner wall of the sheath tube 2. Compared with the gap between the first surface 121 and the inner wall of the sheath tube 2, a larger gap can be formed between the second surface 122 and the inner wall of the sheath tube 2, which is more conducive to the smooth discharge of the substance to be discharged.

[0032] In addition, in some other cases, see Figure 5 , Figure 5 The dotted line in FIG. 1 shows the outer contour of the second segment 120, and the first segment 110 and the second segment 120 may be flush with each other. Figure 5 As shown, in the front view of the insertion portion 100, the lines are flush, that is, the outer contours of the first section 110 and the second section 120 only overlap, and then a line located on the surface of the second section 120 and extending along the axis of the second section 120 coincides with the surface of the first section 110. This arrangement can also make the second section 120 and part of the inner wall of the sheath tube 2 fit each other to increase the space size on the other side of the second section 120. In addition, this arrangement can also reduce the contact area between the second section 120 and the inner wall of the sheath tube 2, reduce the friction between the second section 120 and the sheath tube 2, so that the insertion portion 100 is easier to insert into the sheath tube 2.

[0033] In another embodiment, see Figure 6 The second surface 122 is recessed toward the direction close to the first surface 121, and the specific recessed direction is as follows: Figure 6As shown in L3 in the figure. The recessed setting of the second surface 122 can make the gap between the second surface 122 and the inner wall of the sheath 2 larger. It is understandable that the recessed setting of the second surface 122 can configure the second surface 122 with a concave arc surface, and the inner wall of the sheath 2 can be a curved surface. The combination of the two can make the shape of the space enclosed by the second surface 122 and the inner wall of the sheath 2 roughly circular, and the circular channel can more conveniently guide objects such as stones to pass through, reducing the risk of blockage and jamming. This is because the circular channel has a smoother curve and a more uniform inner wall, allowing objects to move more easily along the channel. This setting can optimize the shape of the channel and improve the operational performance and use effect of the entire structure.

[0034] In another case, the second surface 122 may be a plane, or the second surface 122 may be protruded in a direction away from the first surface 121 , which will not be elaborated herein.

[0035] In this example, please refer to Figure 3 The insert portion 100 has a first side 130 and a second side 140 that are away from each other, and the axis of the first section 110 is as shown in FIG. Figure 3 As shown in L1 in FIG. 1 , the axis of the second section 120 is as shown in FIG. Figure 3 As shown in L2 in the figure. The first section 110 is provided with a first tube section 111 of the instrument tube, the front end assembly 113 may include a camera module, the axis of the second section 120 is located on the first side 130 of the axis of the first section 110, and the second section 120 can be off-axis relative to the first section 110. When the first section 110 is located in the sheath tube 2, the second section 120 can be offset relative to the sheath tube 2 to ensure that a larger space can be formed between the second section 120 and the sheath tube 2. The camera module of the front end assembly 113 is located on the second side 140 of the first tube section 111, and the second section 120 is provided with a second tube section 123, which is connected to the first tube section 111 to form a channel 114. The mutual positional relationship between the first section 110 and the second section 120 and the relative positional relationship between the front end assembly 113 and the first tube section 111 can make the first tube section 111 and the second tube section 123 distributed along the axis of the insertion portion 100, and the channel 114 formed by the two does not have any bends. This linear layout helps to reduce the resistance and pressure loss of the medium or equipment in the channel 114 , thereby improving the use effect of the channel 114 .

[0036] In another embodiment, see Figure 7, the first section 110 is provided with a first tube section 111 of the instrument tube, and the distal end of the first section 110 is configured as a slope 112, and the slope 112 is inclined relative to the axis of the first section 110. Furthermore, in the direction from the first section 110 to the second section 120, the slope 112 is inclined along the direction from the first surface 121 to the second surface 122. Exemplarily, the slope 112 has a guiding function, and the slope 112 can cooperate with the guiding component of the sheath 2. Among them, the guiding component can be an elastic limiter. The guiding component can guide the first section 110 to move in the direction from the second surface 122 to the first surface 121, and then the first section 110 can be offset compared to the sheath 2, so that a larger space is formed on one side of the first section 110, so that subsequent stones can pass through the first section 110 smoothly.

[0037] For example, Figure 7 As shown, the axis of the first section 110 is as shown in Figure 7 As shown in L1 in FIG. 1 , the axis of the second section 120 is as shown in FIG. Figure 7 As shown in L2 in FIG. The insertion portion 100 has a first side 130 and a second side 140 that are away from each other, the axis of the second section 120 is located on the first side 130 of the axis of the first section 110, and the inclined surface 112 is formed on the surface of the first section 110 close to the second side 140. In other words, the second section 120 is offset toward the first side 130 relative to the sheath tube 2, and the gap between the second side 140 of the second section 120 and the inner wall of the sheath tube 2 is larger. The inclined surface 112 is formed on the surface of the first section 110 close to the second side 140, and the inclined surface 112 guides the insertion portion 100 to move toward the first side 130, so that the space of the second side 140 of the second section 120 is further increased, and there is a larger channel between the insertion portion 100 and the sheath tube 2, which can pass larger stones and avoid the stones from being blocked or stuck in the channel.

[0038] For more details, please refer to Figure 7 , the second section 120 is provided with a second pipe section 123, and the first pipe section 111 and the second pipe section 123 are connected to form a channel 114. The camera module is located at the distal end of the first section 110, and the first pipe section 111 is located at the second side 140 of the camera module, and the inclined surface 112 can be formed on one side of the distal camera module of the first pipe section 111. The inclined surface 112 can guide the first section 110 to move along the direction from the first pipe section 111 to the camera module, so that a larger space can be formed on the side of the first pipe section 111 away from the camera module. The camera module and the second pipe section 123 are distributed along the axis of the insertion part 100. This setting can ensure the guiding effect of the inclined surface 112, while the first pipe section 111 and the second pipe section 123 form a larger space on the same side, which has better passability and can pass larger stones, thereby improving the use effect of the insertion part 100.

[0039] During this period, the inclined surface 112 is opened at the far end of the first tube segment 111, but not at the far end of the camera module. This setting can ensure that the camera module is at the far end of the first tube segment 111, and does not need to be tilted, so that the image closest to the target area can be captured. In addition, the inclined surface 112 can adjust the opening direction of the first tube segment 111, so that the opening of the first tube segment 111 is toward the second side 140. When the first tube segment 111 discharges the medium, the first tube segment 111 can receive the reaction force generated by the medium, and the reaction force can drive the first tube segment 111 to move toward the first side 130, so that at least a portion of the surface of the first tube segment 111 located on the first side 130 can fit with the inner wall of the sheath 2.

[0040] In this embodiment, if Figure 4 as well as Figure 6 As shown, the first section 110 and / or the second section 120 further has a limiting surface 150, and the limiting surface 150 is used to abut against the limiting structure 210 of the sheath tube 2 to constrain the insertion portion 100 inserted into the sheath tube 2. For example, as Figure 8 As shown, Figure 8 The schematic diagram of the structure of the limiting surface 150 of the first section 110 and the limiting structure 210 of the sheath 2 is shown. The limiting structure 210 of the first section 110 is convexly arranged on the inner wall of the sheath 2, and the limiting surface 150 can abut against the limiting structure 210, thereby limiting the movement of at least part of the insertion part 100 in the radial direction of the sheath 2. At this time, the second section 120 can form a larger space between the sheath 2 to pass the stone. Because the second section 120 is limited, the space will not be deformed or narrowed, so as to avoid the relative movement of the insertion part 100 in the sheath 2 and improve the passing efficiency of the stone.

[0041] In a more specific implementation, please continue to refer to Figure 8 The limiting surface 150 may include a first limiting surface 151 and a second limiting surface 152, which are disposed at opposite sides of the first section 110 and / or the second section 120. The first limiting surface 151 and the second limiting surface 152 can abut against the limiting structure 210, thereby limiting the movement of at least part of the insertion portion 100 in the radial direction of the sheath tube 2.

[0042] Exemplarily, the second section 120 may include a first portion 124 and a second portion 125, and the first portion 124 and the second portion 125 are disposed on opposite sides of a line between the first limiting surface 151 and the second limiting surface 152. Exemplarily, the line Figure 6The dotted line in FIG. 1 is the line connecting the farthest ends of the first limiting surface 151 and the second limiting surface 152. Based on the line connecting the first limiting surface 151 and the second limiting surface 152, the first portion 124 is the portion of the second segment 120 close to the first surface 121, and the second portion 125 is the portion of the second segment 120 close to the second surface 122. The cross-sectional area of ​​the first portion 124 is greater than that of the second portion 125. In particular, since the second surface 122 is recessed toward the direction close to the first surface 121, Figure 6 The second portion 125 in the figure is divided into two parts by the connecting line. In some other cases, the second surface 122 can also be configured as a plane or a convex setting, and the second portion 125 can also be divided into a continuous part by the connecting line. On the connecting line between the first limiting surface 151 and the second limiting surface 152, the second section 120 is an asymmetric structure. Fig. 9 As shown, Fig. 9 The schematic diagram of the structure of the limiting surface 150 of the second section 120 and the limiting structure 210 of the sheath tube 2 is shown, and the space on both sides of the second section 120 is not evenly divided. When the first limiting surface 151 and the second limiting surface 152 are in limiting cooperation with the limiting structure 210, this arrangement enables the second section 120 to provide a larger space on the second side 140 for the circulation of stones.

[0043] It is understandable that the unequal arrangement of the first portion 124 and the second portion 125 allows the second portion 120 to be offset relative to the sheath tube 2 to form a larger space when the first portion 110 is fully extended. In addition, the second portion 120 may be an elastic structure, that is, the elastic first limiting surface 151 and the second limiting surface 152 may be adapted to different sizes or shapes of limiting structures 210 to improve their limiting effect.

[0044] In this example, see Fig.10 , the insert portion 100 is configured to be bent toward at least two different radial directions. Exemplarily, the insert portion 100 may be bent toward a first direction or a second direction. The first direction is as follows: Fig.10 The second direction is shown as L4, which is the vertical direction. Fig.10 As shown in L5, that is, the left and right directions. This setting can enable the insertion part 100 to have at least two independent bending degrees of freedom, and there is an angle between the two degrees of freedom, which can be 0°, 45°, 90°, etc., and this implementation does not limit it. When the insertion part 100 is relatively fixed in the sheath tube 2, the insertion part 100 can still be moved to a larger implementation scene through multi-directional rotation, thereby improving the implementation effect of the insertion part 100.

[0045] To achieve the above-mentioned and other related purposes, the present application provides an endoscope 1, see Fig.11, the endoscope 1 may include the aforementioned insertion portion 100. In this way, the endoscope 1 has the beneficial effects of any of the aforementioned solutions, which will not be repeated here. The endoscope 1 may be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a colonoscope, 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 1.

[0046] The technical solution adopted by the present invention can achieve the following beneficial effects: the cross-sectional area of ​​the first section 110 is larger than that of the second section 120, and the first section 110 and the second section 120 are out of axis. When the insertion part 100 is inserted into the sheath tube 2, the first section 110 and the sheath tube 2 are at least partially in contact with each other, so that the axis of the first section 110 and the sheath tube 2 are roughly coaxial. At this time, the second section 120 is offset relative to the sheath tube 2, that is, the space on one side between the second section 120 and the sheath tube 2 is relatively larger, which has better passability, is conducive to the smooth removal of stones waiting to be removed, and solves the problem of unsmooth stone removal when the insertion part 100 is in the sheath tube 2.

[0047] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0048] In addition, it should be noted 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, and may also include performing functions in a substantially simultaneous manner or in a reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

[0049] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An insertion portion of an endoscope, characterized in that: include: a first section, a distal end of the first section being provided with a front end assembly; and a second segment, the second segment being connected to the proximal end of the first segment, the first segment having a larger cross-sectional area than the second segment, and the first segment and the second segment being coaxial; Wherein, the insertion portion further includes a channel running through the first section and the second section.

2. The insertion portion according to claim 1, characterized in that: One side of the first section and one side of the second section are flush with each other.

3. The insertion portion according to claim 2, characterized in that: The second section includes a first surface and a second surface that are opposite to each other; The first surface is flush with a partial surface of the first section, and / or the second surface is recessed in a direction close to the first surface.

4. The insertion portion according to claim 1, characterized in that: The first section is provided with a first tube section of the instrument tube, the distal end of the first section is configured as a slope, the slope is inclined relative to the axis of the first section, and the insertion portion has a first side and a second side that are far away from each other, the axis of the second section is located on the first side of the axis of the first section, and the slope is formed on the surface of the first section close to the second side.

5. The insertion portion according to claim 4, characterized in that: The front end component includes a camera module, which is located at the distal end of the first section. The second section is provided with a second pipe section, the first pipe section and the second pipe section are connected to form the channel, the camera module and the second pipe section are distributed along the axis of the insertion part, and the first pipe section is located on the second side of the camera module.

6. The insertion portion according to claim 1, characterized in that The first section is provided with a first tube section of the instrument tube, the front end assembly includes a camera module, the insertion portion has a first side and a second side that are far away from each other, the axis of the second section is located on the first side of the axis of the first section, the camera module is located on the second side of the first tube section, the second section is provided with a second tube section, and the second tube section is connected to the first tube section.

7. The insertion portion according to any one of claims 1 to 6, characterized in that: The first section and / or the second section further has a limiting surface, and the limiting surface is used to abut against the limiting structure of the sheath tube to constrain the insertion part inserted into the sheath tube.

8. The insertion portion according to claim 7, characterized in that: The limiting surface comprises a first limiting surface and a second limiting surface, wherein the first limiting surface and the second limiting surface are arranged on opposite sides of the first section and / or the second section, wherein the second section comprises a first part and a second part, wherein the first part and the second part are arranged on opposite sides of a line connecting the first limiting surface and the second limiting surface, and a cross-sectional area of ​​the first part is larger than that of the second part.

9. The insertion portion according to claim 1, characterized in that: The insert portion is configured as a structure bent toward at least two different radial directions.

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

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