An insertion portion and an endoscope

Abstract

The present invention discloses an insertion portion and an endoscope, relating to the field of medical instruments. The insertion portion includes a first section and a second section. A distal end of the first section is configured with a front-end assembly. The first section has a first channel. The second section is connected to a proximal end of the first section. The second section has a second channel. An opening of the second channel is formed on a side surface of the second section. The first channel penetrates from the distal end of the first section to the proximal end of the second section. The insertion portion has relatively independent first and second channels, and the first and second channels cooperate with each other to achieve more complex operations. The opening of the second channel is formed on the side surface of the second section. This setting can avoid the front-end assembly of the first section, so that the size of the opening of the second channel is larger, prevent the second channel from occupying the distal space of the insertion portion, reduce the volume of the end of the insertion portion, and enable the insertion portion to be inserted into a sheath or a human body cavity more smoothly.

Description

Technical Field

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

[0002] A guiding sheath and an endoscope are highly precise medical devices specifically designed and widely used in the field of urinary system examination and treatment. The guiding sheath, as an auxiliary tool, is usually used to guide an 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 the operation, and improve the success rate of the operation and the recovery speed of patients.

[0003] In a stone operation, the insertion part of the endoscope is inserted into the renal pelvis. And, in order to promote the discharge of stones and prevent infection, media such as normal saline and distilled water need to be injected into the human body. The stones are observed and broken by a laser or the like. After the stones are broken, a negative pressure environment can be provided by the sheath tube to suck the stones into the gap between the sheath tube and the insertion part, so as to discharge the stones. However, it is necessary to insert the sheath tube and the endoscope in sequence, and the use is cumbersome. Moreover, the position of the insertion part in the sheath tube is uncertain, and the insertion part will hinder the passage of stones through the gap, and it is easy to have the problem of unsmooth stone discharge. Summary of the Invention

[0004] In view of the above disadvantages of the related art, the present application provides an insertion part and an endoscope to solve the above technical problems.

[0005] The present application provides an insertion part of an endoscope. The insertion part includes a first section and a second section. A front-end assembly is disposed at the distal end of the first section. The first section has a first channel. The second section is connected to the proximal end of the first section. The second section has a second channel. An opening of the second channel is formed on the side surface of the second section. The first channel penetrates from the distal end of the first section to the proximal end of the second section.

[0006] In an embodiment of the present application, the front-end assembly and the second channel are located on the same side of the first channel, and are arranged in sequence along the axis of the insertion part between the second channel and the front-end assembly.

[0007] In an embodiment of the present application, the end face surrounding the opening is configured as a first inclined surface, and in the direction from the first section to the second section, the first inclined surface inclines radially outward along the insertion part.

[0008] In an embodiment of the present application, the front-end assembly and the second channel are spaced apart.

[0009] In an embodiment of the present application, one end of the first section close to the second channel is configured as a second inclined surface, and in the direction from the first section to the second section, the second inclined surface inclines radially inward along the insertion part.

[0010] In an embodiment of the present application, the first section is configured as a bending section, and at least one bending direction of the first section intersects with the arrangement direction between the first channel and the second channel.

[0011] In an embodiment of the present application, the insertion portion includes an instrument tube, the first channel is formed in the instrument tube, and the tube wall of the instrument tube surrounding the second channel is recessed.

[0012] In an embodiment of the present application, in the axial direction of the insertion portion, the projection of the first section is located within the projection of the second section.

[0013] In an embodiment of the present application, along the axial direction of the insertion portion, at least a part of the projection of the second channel is located outside the projection of the first section.

[0014] In an embodiment of the present application, the projected area of the front-end assembly in the axial direction of the insertion portion is smaller than that of the second channel.

[0015] In an embodiment of the present application, the opening faces from the proximal end to the distal end of the insertion portion.

[0016] To achieve the above and other related purposes, the present application provides an endoscope including the aforementioned insertion portion.

[0017] The technical solution adopted by the present invention can achieve the following beneficial effects: The insertion portion has relatively independent first and second channels, and the first and second channels cooperate with each other to achieve more complex operations. Moreover, the insertion portion can also complete the work of extracting and injecting the medium without the cooperation of a sheath tube, thereby improving the use efficiency of the insertion portion. For example, in a lithotripsy operation, medical staff can directly insert the insertion portion into the body cavity, and insert a treatment instrument such as a laser and / or inject a medium such as normal saline through the first channel to break the stone. The medical staff can synchronously control the second channel to generate negative pressure, and the second channel can suck the crushed stone particles and the medium together out of the body. In addition, the opening of the second channel is formed on the side of the second section, which can avoid the front-end assembly of the first section, so that the size of the opening of the second channel is larger, preventing the second channel from occupying the distal space of the insertion portion, reducing the end volume of the insertion portion, and enabling the insertion portion to enter the body cavity more smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention, and those of ordinary skill in the art can obtain other drawings without creative efforts based on these drawings.

[0019] Figure 1It is a schematic structural diagram of the insertion part shown in an exemplary embodiment of the present application;

[0020] Figure 2 It is a schematic structural diagram of the insertion part from another perspective shown in an exemplary embodiment of the present application;

[0021] Figure 3 It is a schematic structural diagram of another type of insertion part shown in an exemplary embodiment of the present application;

[0022] Figure 4 It is a schematic structural diagram of yet another type of insertion part shown in an exemplary embodiment of the present application;

[0023] Figure 5 It is a schematic structural diagram of yet another and another type of insertion part shown in an exemplary embodiment of the present application;

[0024] Figure 6 It is a schematic structural diagram of the insertion part shown in another exemplary embodiment of the present application;

[0025] Figure 7 It is a schematic structural diagram of the second section shown in an exemplary embodiment of the present application;

[0026] Figure 8 It is a schematic structural diagram of the insertion part from yet another perspective shown in an exemplary embodiment of the present application;

[0027] Figure 9 It is a schematic structural diagram of the endoscope shown in an exemplary embodiment of the present application.

[0028] In the figure: 1. Endoscope; 100. Insertion part; 110. First section; 111. Front-end assembly; 112. First channel; 113. Second inclined plane; 120. Second section; 121. Second channel; 122. Opening; 123. First inclined plane; 130. Instrument tube. Detailed implementation manners

[0029] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other implementation manners obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope protected by the present invention.

[0030] The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, rather than 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 this application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are usually of the same 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 description and claims means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.

[0031] In various embodiments of this application, "proximal end" and "distal end" refer to the relative positions of each component to the user in the usage environment. Among them, 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".

[0032] The guiding sheath and the endoscope are high-precision medical devices specifically designed and widely used in the field of urinary system examination and treatment. The guiding sheath, as an auxiliary tool, 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 the operation, and improve the success rate of the operation and the patient's recovery speed.

[0033] In a lithotripsy operation, the insertion part of the endoscope is inserted into the renal pelvis. And, in order to promote the excretion of stones and prevent infection, media such as normal saline and distilled water need to be injected into the human body. The stones are observed and broken by a laser or the like. After the stones are broken, the sheath tube can be used to provide a negative pressure environment to aspirate the stones into the gap between the sheath tube and the insertion part, so as to discharge the stones. However, it is necessary to insert the sheath tube and the endoscope in sequence, and the use is cumbersome. Moreover, the position of the insertion part in the sheath tube is uncertain, and the insertion part will hinder the stones from passing through the gap, and it is easy to have the problem of unsmooth stone discharge.

[0034] In the prior art, the insertion part is provided with two different channels, but the front end of the insertion part is provided with a front-end component, such as a camera module, a lighting module, etc. This setting causes the front end of the insertion part to be too large in volume and difficult to insert into the sheath tube or the human body cavity, affecting the use of the endoscope.

[0035] This application provides an insertion part 100 of an endoscope 1, which is hereinafter referred to as the insertion part 100. Please refer to Figure 1 , the insertion part 100 is used to be inserted into various lumens and body cavities of the human body, such as the digestive tract, the respiratory tract, etc. Among them, the insertion part 100 can be rotated to a specified orientation to facilitate observation and treatment by medical staff.

[0036] It is understandable that the insertion part 100 is directly inserted into various lumens and body cavities of the human body, or, by first inserting a sheath tube, a channel is established in the human body using the sheath tube, and then the insertion part 100 is inserted into the sheath tube. The usage mode of the insertion part 100 is not limited herein.

[0037] Please refer to Figure 1 and Figure 2 , the insertion part 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. Exemplarily, the first section 110 may be an actively bendable section, and the second section 120 may be a passively bendable section, etc., which are not limited in this embodiment. Medical staff can operate the operation end of the endoscope 1 to control the first section 110 to bend towards specified directions around.

[0038] Among them, a front-end component 111 is configured at the distal end of the first section 110. The front-end component 111 of the first section 110 may include a camera module. Under the control of medical staff, the first section 110 can rotate to a specified orientation, and then the camera module can obtain image signals at a specified position, so as to facilitate medical staff to observe and control the instrument for treatment operations.

[0039] Please refer back to Figure 1 , the first section 110 has a first channel 112, and the first channel 112 runs through from the distal end of the first section 110 to the proximal end of the second section 120. The first channel 112 is used for inserting treatment instruments, such as biopsy forceps, lasers, etc., and / or, the first channel 112 is used for injecting media, such as normal saline, distilled water, etc. Exemplarily, while the first channel 112 can guide the biopsy forceps into the body, the first channel 112 can inject normal saline towards the body. In this embodiment, the shape and use of the first channel 112 are not limited.

[0040] Please continue to refer to Figure 1 , the second section 120 may have a second channel 121, and the second channel 121 and the first channel 112 are independent of each other, and their functions may be the same or different, so that medical staff can operate the insertion part 100 more flexibly. Exemplarily, during a lithotripsy operation, the insertion part 100 is inserted into the body cavity of the human body. Medical staff can insert treatment instruments, such as lasers, through the first channel 112 to break up the stones, and use the first channel 112 to inject media, such as normal saline, into the human body to promote the discharge of stones and prevent infection. Medical staff can synchronously control the second channel 121 to generate negative pressure, and the second channel 121 can suck the broken stone particles and the media together out of the body.

[0041] It is understandable that in some other cases, medical staff operate the insertion part 100 to inject the medium into the human body through the second channel 121, and insert treatment instruments such as a laser through the second channel 121. Then, the stone particles and the medium are aspirated out of the body together through the first channel 112. Here, the specific usage modes of the first channel 112 and the second channel 121 are not limited. Moreover, since the insertion part 100 has an independent first channel 112 and second channel 121, the insertion part 100 can be directly inserted into the human body, reducing the operation steps to improve the surgical efficiency. The insertion part 100 can still be applied inside the sheath tube. According to the specific implementation purposes and implementation scenarios of the endoscope 1, etc., the specific implementation modes of the insertion part 100 are selected and designed, which will not be elaborated here.

[0042] As Figure 1 and Figure 2 shown, the opening 122 of the second channel 121 is formed on the side surface of the second section 120, that is, the opening 122 of the second channel 121 is formed on the side surface of the insertion part 100. This setting can prevent the second channel 121 from occupying the distal space of the insertion part 100, reducing the volume of the end of the insertion part 100, so that the insertion part 100 can be inserted into the sheath tube or other human body catheters more smoothly. At the same time, the insertion part 100 can also have a larger space to arrange the camera module and the first channel 112.

[0043] Preferably, the orientation of the opening 122 is from the proximal end to the distal end of the insertion part 100, that is, the orientation of the opening 122 is the same as the extending direction of the insertion part 100 at the opening 122. And when the insertion part 100 is bent, the direction of the opening 122 is not the connection line between the proximal end and the distal end of the insertion part 100, but the extending direction of the insertion part 100 at the opening 122. Exemplarily, the specific orientation of the opening 122 is as shown by L1 in Figure 2 . This setting can minimize the obstruction during the discharge process of the substance and enable the discharged substance to pass through the opening 122 more smoothly, thereby improving the discharge efficiency.

[0044] When the second channel 121 and the front-end component 111 are arranged on different sides, the volume of the insertion part 100 will increase accordingly. In this embodiment, the cross-sectional area of the first section 110 is larger than that of the second section 120, that is, the volume of the first section 110 is larger than that of the second section 120. The larger-volume first section 110 can accommodate the front-end component 111 to ensure the safe use of the front-end component 111. The front-end component 111 and the second channel 121 are located on the same side of the first channel 112. The second channel 121 and the front-end component 111 are arranged along the axis of the insertion part 100, and the opening 122 faces the front-end component 111. This setting can reduce the volume of the insertion part 100 and can also ensure that the first channel 112 is straight, avoiding the bending of the first channel 112, which affects the discharge efficiency of the medium and hinders the entry of medical instruments into the first channel 112.

[0045] Please refer to Figure 3 Figure 3 , the end face enclosing the opening 122 can be configured as a first inclined surface 123. In the direction from the first section 110 to the second section 120, the first inclined surface 123 is inclined radially outward along the insertion part 100. The first inclined surface 123 has a guiding function, and it can gradually and smoothly contact and adapt to the surface of the human body part or the sheath tube to be inserted. Compared with a right angle or a sharp edge, the first inclined surface 123 can significantly reduce the frictional force and resistance when the insertion part 100 is inserted, thereby reducing the risk of damage to the patient's tissue. Due to the reduced insertion resistance, medical staff can more easily control the endoscope 1 during the operation, reducing the operation difficulty and time. At the same time, the patient can also feel less pain and discomfort, thereby improving the overall treatment experience.

[0046] In one embodiment, please refer back to Figure 2 Figure 2 , one end of the first section 110 close to the second channel 121 is configured as a second inclined surface 113. In the direction from the first section 110 to the second section 120, the second inclined surface 113 is inclined radially inward along the insertion part 100. The second inclined surface 113 has a guiding function. The second inclined surface 113 is inclined radially inward in the direction from the first section 110 to the second section 120, and the thickness of the proximal end of the front-end assembly 111 of the first section 110 gradually changes. The gradually changing space can more smoothly guide the medium and the substances to be discharged to the opening 122, so as to improve the discharge effect of the second channel 121.

[0047] In another embodiment, please refer to Figure 4 Figure 4 , the front-end assembly 111 and the second channel 121 are arranged at intervals. In other words, there is a certain gap between the opening 122 of the second channel 121 and the front-end assembly 111 of the first section 110. The front-end assembly 111 and the second channel 121 can be located on the same side of the first channel 112, and there is enough gap between them for passing substances to be excluded, such as stone particles, etc. Among them, the distance between the front-end assembly 111 and the second channel 121 can be selected and designed according to specific implementation objectives and suction effects, etc., and this implementation does not limit it. This setting can improve the suction effect of the second channel 121 and prevent the front-end assembly 111 from blocking the opening 122.

[0048] It can be understood that in some other cases, as Figure 5 Figure 5 shows, while one end of the first section 110 close to the second channel 121 is configured as the second inclined surface 113, the front-end assembly 111 and the second channel 121 are arranged at intervals. This setting can increase the distance between the front-end assembly 111 and the second channel 121, and can further improve the discharge effect of the second channel 121, which will not be elaborated here.

[0049] In this embodiment, please refer toFigure 6 , the first section 110 is configured as a bending section. Among them, the bending section can be an active bending section or a passive bending section. Exemplarily, when the first section 110 is an active bending section, medical staff can operate the operating end of the endoscope 1 to control the first section 110 to bend towards a specified direction around. Or, when the first section 110 is a passive bending section, the first section 110 is bent by the restraint of the human body cavity or the like to adapt to the bent cavity. At least part of the first channel 112 and the camera module of the front-end assembly 111 are arranged in the first section 110. The first section 110 can drive the camera module and the distal end of the instrument tube 130 to bend, so that medical staff can observe more images and operate the insertion part 100 to enter more places for treatment.

[0050] When the insertion part 100 bends, the bent insertion part 100 may block the opening 122, thereby causing a situation where the suction effect of the second channel 121 is poor. In this embodiment, please continue to refer to Figure 6 , at least one bending direction of the first section 110 intersects with the arrangement direction between the first channel 112 and the second channel 121. Exemplarily, the first section 110 can at least bend along a first direction (such as Figure 6 shown by L2 in Figure 6 ), the distribution direction of the first channel 112 and the second channel 121 is a second direction (such as

[0051] shown by L3 in Figure 7 ), and the first direction and the second direction intersect. When the first section 110 bends along the first direction, it will not completely squeeze or block the opening 122, ensuring that the bent insertion part 100 can still suck the substance to be discharged, improving the use effect of the insertion part 100. Figure 7 shown by L4 in

[0052] In this embodiment, please refer to Figure 8 , in the axial direction of the insertion part 100, the projection of the first section 110 is located within the projection of the second section 120. When the projection of the first section 110 is located outside the second section 120, when the insertion part 100 is inserted into the sheath tube, the first section 110 can abut against the inner wall of the sheath tube and push the second section 120 away from the inner wall of the sheath tube, which causes a gap to be formed between the second section 120 and the inner wall of the sheath tube. The substance to be discharged enters the gap and is not sucked out of the body by the second channel 121, which will subsequently hinder the movement of the insertion part 100 in the sheath tube. This setting can prevent the front-end assembly 111 of the first section 110 from affecting the relative position between the second channel 121 and the inner wall of the sheath tube, ensure the position and shape of the second channel 121, and ensure that the second channel 121 has a smooth suction path.

[0053] In a more specific embodiment, please continue to refer to Figure 8 , the projected area of the front-end assembly 111 in the axial direction of the insertion part 100 is smaller than that of the second channel 121. Exemplarily, the front-end assembly 111 can be a camera module, and the camera module is arranged on one side of the distal end of the first channel 112 for the camera module to obtain clearer images. At the same time, in the axial direction of the insertion part 100, at least part of the second channel 121 is not blocked by the front-end assembly 111, and the substance to be discharged can be directly sucked into the second channel 121 from the distal end of the insertion part 100. In addition, the tube wall forming the second channel 121 can abut against the inner wall of the sheath tube to bias the first section 110 relative to the sheath tube, which is beneficial for the substance to be discharged to enter the second channel 121 and be discharged.

[0054] Furthermore, as Figure 8 shown, along the axial direction of the insertion part 100, at least part of the projection of the second channel 121 is located outside the projection of the first section 110. At least part of the second channel 121 is not blocked by the first section 110, and the substance to be discharged can be directly sucked into the second channel 121 from the distal end of the insertion part 100, improving the discharge effect of the second channel 121.

[0055] In addition, when the insertion part 100 is inserted into the sheath tube, a guiding structure (not shown in the figure) can be configured at the distal end of the first section 110, and the guiding structure cooperates with the limiting structure of the sheath tube. The limiting structure can constrain the insertion part 100. Relative to the sheath tube, the insertion part 100 is biased towards one side, and thus the space on the other side of the insertion part 100 is larger. The larger space can accommodate a second channel 121 with a larger size. Along the axial direction of the insertion part 100, the projected area of the second channel 121 located outside the projection of the first section 110 can be configured to be larger, improving the discharge effect of the second channel 121.

[0056] To achieve the above and other related objectives, the present application provides an endoscope 1. Please refer to Figure 9 , the endoscope 1 may include the aforementioned insertion portion 100. In this way, the endoscope 1 has the beneficial effects of any of the foregoing solutions, which will not be elaborated herein. The endoscope 1 may be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a nasal endoscope, an oral endoscope, a laryngoscope, a vaginoscope, a laparoscope, an arthroscope, etc. The embodiments of the present application do not specifically limit the type of the endoscope 1.

[0057] The technical solution adopted by the present invention can achieve the following beneficial effects: The insertion portion 100 has relatively independent first and second channels 112 and 121, which cooperate with each other to achieve more complex operations. Moreover, the insertion portion 100 can also complete the work of extracting and injecting media without the cooperation of a sheath tube, which improves the use efficiency of the insertion portion 100. For example, in a lithotripsy operation, medical staff can directly insert the insertion portion 100 into the body cavity, and insert treatment instruments such as a laser and / or inject media such as normal saline through the first channel 112 to break up the stone. The medical staff can synchronously control the second channel 121 to generate negative pressure, and the second channel 121 can suck the crushed stone particles and the media out of the body together. In addition, the opening 122 of the second channel 121 is formed on the side surface of the second section 120. This setting can avoid the front-end assembly 111 of the first section 110, so that the size of the opening 122 of the second channel 121 is larger, preventing the second channel 121 from occupying the distal space of the insertion portion 100, reducing the end volume of the insertion portion 100, and enabling the insertion portion 100 to be inserted into the sheath tube or the body cavity more smoothly.

[0058] It should be noted that in this article, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including that element.

[0059] 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, and may also include performing functions in a substantially simultaneous manner or in the 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, the features described with reference to certain examples may be combined in other examples.

[0060] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention.

Claims

1. An insertion portion of an endoscope, characterized in that: include: A first section, the first section is configured as a curved section, a distal end of the first section is configured with a front end assembly, and the first section has a first channel; A second section, the second section is connected to the proximal end of the first section, the second section has a second channel, the second channel has an opening, and the opening is opened on the side of the second section; The first channel extends from the distal end of the first section to the proximal end of the second section, the front end assembly and the second channel are located on the same side of the first channel, and at least one bending direction of the first section intersects with the arrangement direction between the first channel and the second channel.

2. The insertion portion according to claim 1, characterized in that: The second channel and the front end assembly are arranged in sequence along the axis of the insertion portion.

3. The insertion portion according to claim 2, characterized in that: The end surface surrounding the opening is configured as a first inclined surface, and in a direction from the first section to the second section, the first inclined surface is inclined outward in a radial direction of the insertion portion.

4. The insertion portion according to claim 2, characterized in that: The front end component is spaced apart from the second channel.

5. The insertion portion according to claim 2, characterized in that: One end of the first section close to the second channel is configured as a second inclined surface, and in a direction from the first section to the second section, the second inclined surface is inclined inwardly along the radial direction of the insertion portion.

6. The insertion portion according to claim 2, characterized in that: The insertion portion includes an instrument tube, the first channel is formed in the instrument tube, and a tube wall of the instrument tube surrounding the second channel is recessed.

7. The insertion portion according to claim 2, characterized in that: In the axial direction of the insertion portion, the projection of the first section is located within the projection of the second section; And / or, along the axial direction of the insertion portion, the projection of the second channel is at least partially located outside the projection of the first section.

8. The insertion portion according to claim 7, characterized in that: A projection area of ​​the front end assembly in the axial direction of the insertion portion is smaller than the second channel.

9. The insertion portion according to any one of claims 1 to 8, characterized in that: The opening is oriented from the proximal end to the distal end of the insertion portion.

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

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