Insertion tube connection structure and endoscope

Abstract

The utility model provides an insertion tube connecting structure and an endoscope, and relates to the technical field of surgical instruments, and the insertion tube connecting structure comprises a handle shell, a connecting shaft and a locking assembly. The handle shell is provided with an assembling hole, the connecting shaft penetrates through the assembling hole, and the locking assembly is connected to the connecting shaft. The locking assembly has a first working state and a second working state which are mutually switched, and when the locking assembly is in the first working state, the locking assembly is matched with the handle shell to fix the connecting shaft so as to limit the connecting shaft to move relative to the assembly hole. And when the locking assembly is in the second working state, the connecting shaft can rotate relative to the assembling hole. According to the connecting structure, the direction can be adjusted as required during assembly, the assembly flexibility is high, the assembly quality is high, and the product yield is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, specifically, relate to a kind of insertion tube connecting structure and endoscope. BACKGROUND

[0002] Endoscope is mainly composed of insertion part, operating part and signal line etc. When endoscope product is assembled, whether insertion part is rotatable or not, initial direction setting exists when insertion part and operating part are assembled and connected, to ensure that the head end working channel outlet of insertion part and CMOS image sensor are distributed symmetrically relative to the central axis of operating part. In prior art, insertion part connecting shaft is installed at the tail end of insertion part, and connection is realized between insertion part connecting shaft and operating part;Wherein, limiting feature is arranged on insertion part connecting shaft and assembled with insertion part knob, and insertion part knob is rotated to drive insertion part connecting shaft to rotate, thereby driving insertion part to rotate.

[0003] The inventor found that the existing insertion part connecting structure has at least the following shortcomings:

[0004] Positioning exists between insertion part knob and insertion part connecting shaft, to ensure the direction of insertion part, the bonding between insertion part and insertion part connecting shaft must be ensured in correct direction. Once deviation exists in the direction of insertion part and insertion part connecting shaft, it directly leads to the deviation of insertion part direction of finally assembled endoscope product and cannot be adjusted, poor assembly flexibility, and low yield of product. SUMMARY

[0005] The utility model aims to provide an insertion tube connecting structure and endoscope, which can adjust the direction as needed during assembly process, improve assembly flexibility, improve assembly quality and improve the yield of product.

[0006] Embodiments of the utility model can be implemented as follows:

[0007] In a first aspect, the utility model provides an insertion tube connecting structure, comprising:

[0008] Handle shell, connecting shaft and locking assembly, the handle shell is provided with assembly hole, the connecting shaft is arranged in the assembly hole, and the locking assembly is connected to the connecting shaft.

[0009] The locking assembly has first working state and second working state which are switched with each other, when in the first working state, the locking assembly is fixed with the handle shell to limit the movement of the connecting shaft relative to the assembly hole;When in the second working state, the connecting shaft can rotate relative to the assembly hole around its own axis.

[0010] In an optional embodiment, a fixing protrusion is arranged on the hole wall of the assembly hole; an outer circumferential surface of the connecting shaft is provided with a limiting step; the locking assembly comprises a locking nut which is screwed on the connecting shaft; when the locking assembly is in the first working state, the limiting step and the locking nut cooperate to clamp the fixing protrusion.

[0011] Based on the above scheme, in the assembling process, the locking assembly is first in the second working state, the connecting shaft is inserted into the positioning hole, the limiting step and the locking nut are respectively located on two sides of the fixing protrusion, the limiting step and the locking nut do not cooperate to clamp the fixing protrusion, at this time, the connecting shaft can be rotated to adjust the direction relative to the handle shell, so that the connecting shaft drives the inserted pipe body to adjust the position. When the position adjustment of the connecting shaft is completed, the relative position of the handle shell and the connecting shaft is kept unchanged, the locking nut is screwed, the distance between the locking nut and the limiting step is reduced, and the two cooperate to clamp the fixing protrusion. At this time, the locking assembly is in the first working state, the connecting shaft is relatively fixed with the handle shell, the connecting shaft cannot rotate relative to the assembly hole nor slide in the axial direction of the assembly hole, the position is firm and reliable, and the adjustment is convenient and flexible.

[0012] In an optional embodiment, the locking assembly further comprises a locking washer which is sleeved on the connecting shaft, the locking washer is located between the limiting step and the fixing protrusion, and the two sides of the locking washer in the axial direction of the connecting shaft are respectively used to abut against the limiting step and the fixing protrusion.

[0013] Based on the above scheme, by arranging the locking washer, the locking washer contacts the fixing protrusion, the contact area of the two is large, and the locking effect is good.

[0014] In an optional embodiment, the fixing protrusion is arranged as an annular protrusion, and an axis of the assembly hole passes through an area surrounded by the annular protrusion.

[0015] Based on the above scheme, the limiting step and one annular surface of the annular protrusion contact, the locking nut and another annular surface of the annular protrusion contact, the contact area of the limiting step, the annular protrusion and the locking nut is large, the stress is uniform, and the locking effect is good.

[0016] In an optional embodiment, the handle shell comprises a shell body and a knob, the knob is rotatably connected with the shell body, and the knob and the shell body are relatively fixed in the axial direction of the knob; the assembly hole is arranged on the knob.

[0017] Based on the above scheme, the connecting shaft is fixed on the knob through the locking assembly, when the knob rotates relative to the shell body, it can drive the connecting shaft and the inserted pipe body to rotate together, realizing the direction adjustment of the front end of the inserted pipe body, which is flexible and convenient to use and has a wide range of use.

[0018] In an optional embodiment, a sealing member is arranged between the hole wall of the assembly hole and the connecting shaft.

[0019] Based on the above scheme, the sealing between the assembly hole and the connecting shaft is high.

[0020] In an optional embodiment, an annular positioning groove is arranged on the outer circumferential surface of the connecting shaft, and the sealing member is sleeved in the annular positioning groove.

[0021] Based on the above scheme, the sealing member is sleeved in the annular positioning groove, the relative position of the sealing member and the connecting shaft in the axial direction of the connecting shaft is fixed, when the connecting shaft is inserted into the assembly hole, the sealing member enters the assembly hole together with the connecting shaft, and after the position of the connecting shaft is fixed, the position of the sealing member is also fixed accordingly, facilitating installation.

[0022] In a second aspect, the utility model provides a kind of endoscope, and the endoscope includes:

[0023] The insertion tube body is fixedly connected with the connecting shaft at one end.

[0024] In an optional embodiment, the connecting shaft is provided with a positioning hole, the positioning hole is provided with a variable-diameter hole section, the inner diameter of the variable-diameter hole section gradually decreases in the direction from the first end of the positioning hole to the second end of the positioning hole, and the insertion tube body is inserted into the positioning hole from the first end.

[0025] Based on the above scheme, the insertion tube body enters the positioning hole from the variable-diameter hole section, the insertion tube body is not easy to collide with the end surface of the positioning hole to generate interference, and the assembly operation of the insertion tube body and the connecting shaft is simple and fast.

[0026] In an optional embodiment, the insertion tube body and the connecting shaft are adhesively fixed.

[0027] Based on the above scheme, the fixing mode of the insertion tube body and the connecting shaft is simple and reliable.

[0028] The insertion tube connecting structure and the endoscope provided by the embodiments of the utility model have the following beneficial effects:

[0029] In summary, the insertion tube connecting structure provided by the embodiment can adjust the working state during assembly, and the connecting shaft and the handle shell are connected through the locking assembly after the position of the connecting shaft relative to the handle shell is determined, so that the operation is flexible and convenient. Specifically, before assembly, the locking assembly is in the second working state, the connecting shaft can move relative to the handle shell, mainly that the connecting shaft can rotate around the axis of the assembly hole in the assembly hole relative to the handle shell, so as to adjust the direction of the connecting shaft relative to the handle shell. After the connecting shaft is rotated to the position matched with the handle shell, the relative position of the connecting shaft and the handle shell is kept unchanged, the locking assembly is operated, the connecting shaft and the handle shell are locked by the locking assembly and the handle shell, after locking, the connecting shaft cannot rotate relative to the handle shell, nor can it slide out of the assembly hole relative to the handle shell, and the relative position of the connecting shaft and the handle shell is firm and reliable. Because the direction of the connecting shaft relative to the handle shell can be adjusted as needed during assembly, the operation is flexible and convenient, the accuracy of the relative position of the connecting shaft and the handle shell is improved, and the yield is improved. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be briefly introduced the drawings needed to be used in the embodiment, should understand, the following drawings only shows some embodiments of the utility model, therefore should not be regarded as the limitation to the range, for the ordinary skilled person in the art, under the premise of not paying the creative labor, still can obtain other related drawings according to these drawings.

[0031] Figure 1 Part structure schematic diagram of endoscope provided by the embodiment;

[0032] Figure 2 Sectional structure schematic diagram of insertion tube connecting structure provided by the embodiment;

[0033] Figure 3 Structure schematic diagram of knob provided by the embodiment;

[0034] Figure 4 Structure schematic diagram of connecting shaft provided by the embodiment;

[0035] Figure 5 Structure schematic diagram of connecting shaft, locking assembly and sealing element cooperation provided by the embodiment.

[0036] Icon:

[0037] 100-handle shell; 110-shell body; 120-rotary knob; 121-assembling hole; 130-fixing protrusion; 200-connecting shaft; 210-first shaft segment; 211-positioning hole; 220-second shaft segment; 221-annular positioning groove; 230-limiting step; 300-locking assembly; 310-locking nut; 320-locking washer; 400-sealing element; 001-insertion tube body. DETAILED DESCRIPTION

[0038] In the prior art, in order to ensure the accuracy of the relative position of the insertion part connecting shaft 200 and the insertion part rotary knob 120, a limiting structure is arranged between the two, for example, a first plane is arranged on the insertion part connecting shaft 200, and a second plane is arranged on the insertion part rotary knob 120. Only when the first plane and the second plane are in close contact, can it be ensured that the insertion part connecting shaft 200 is inserted into the insertion part rotary knob 120, so that the relative position of the two is unique and fixed after insertion. At the same time, the insertion part and the insertion part connecting shaft 200 are fixedly connected, and the relative position of the two cannot be adjusted after being fixed. Therefore, the position accuracy of the insertion part and the insertion part connecting shaft 200 directly determines the assembly quality of the insertion part. In order to ensure the accuracy of the relative position of the insertion part and the insertion part connecting shaft 200, an identification part is generally arranged. However, due to the structural limitation of the insertion part itself, the positioning identification cannot be guaranteed to be accurate, thereby causing the direction deviation of the insertion part and the insertion part connecting shaft 200, and finally leading to the direction deviation of the finished insertion part. In addition, in actual assembly, the insertion part and the insertion part connecting shaft 200 are bonded by a glue layer. In order to ensure the bonding strength, a certain gap is reserved between the two to ensure sufficient glue filling amount. In the initial curing stage, the glue layer has no structural strength, and during the curing period, the insertion part and the insertion part connecting shaft 200 are prone to misalignment, thereby causing the direction deviation of the insertion part and the insertion part connecting shaft 200, and finally leading to the direction deviation of the finished insertion part.

[0039] Therefore, the designer provides an insertion tube connecting structure which can improve the direction deviation of the insertion tube body 001 and improve the assembly quality of the insertion tube body 001 and the handle shell 100.

[0040] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the utility model protection.

[0042] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0043] In the description of the utility model, it should be explained that if the terms such as 'up', 'down', 'inner', 'outer' and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship of the utility model product in common use, it is only for the convenience of describing the utility model and simplifying the description, and is not indicative or suggestive of the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model.

[0044] In addition, if the terms 'first','second' and the like appear, they are only used for distinguishing description, and cannot be understood as indicative or suggestive of relative importance.

[0045] It should be noted that the features in the embodiments of the utility model can be combined with each other without conflict.

[0046] Please combine Figures 1-5 In the embodiment, the insertion tube connecting structure includes a handle shell 100, a connecting shaft 200 and a locking assembly 300. The handle shell 100 is provided with an assembly hole 121, the connecting shaft 200 is arranged in the assembly hole 121, and the locking assembly 300 is connected to the connecting shaft 200. The locking assembly 300 has a first working state and a second working state which are switched with each other, when the locking assembly 300 is in the first working state, the locking assembly 300 is fixedly connected with the handle shell 100 to limit the movement of the connecting shaft 200 relative to the assembly hole 121. When the locking assembly 300 is in the second working state, the connecting shaft 200 can rotate relative to the assembly hole 121 around the axis of the connecting shaft itself.

[0047] As described above, the use mode of the insertion tube connecting structure provided by the embodiment is as follows:

[0048] In the initial assembly stage, the locking assembly 300 is in the second working state, the connecting shaft 200 can move relative to the handle shell 100, at this time, the connecting shaft 200 is operated to rotate relative to the handle shell 100 in the assembly hole 121 around the axis of the assembly hole 121, so as to adjust the direction of the connecting shaft 200 relative to the handle shell 100, and realize the adjustment of the direction of the insertion tube body 001 relative to the handle shell 100. When the connecting shaft 200 is rotated to the position matched with the handle shell 100, the relative position of the connecting shaft 200 and the handle shell 100 is kept unchanged, the locking assembly 300 is operated, and the connecting shaft 200 is locked with the handle shell 100 by the cooperation of the locking assembly 300 and the handle shell 100. After locking, the connecting shaft 200 neither rotates relative to the handle shell 100 nor slides out of the assembly hole 121 relative to the handle shell 100, and the relative position of the connecting shaft 200 and the handle shell 100 is firm and reliable. During the assembly process, the direction of the insertion tube body 001 relative to the handle shell 100 can be adjusted by adjusting the direction of the connecting shaft 200 relative to the handle shell 100, which is not affected by the position accuracy of the insertion tube body 001 and the connecting shaft 200, is flexible and convenient to operate, and the relative position of the insertion tube body 001 and the handle shell 100 is accurate, and the yield rate is high.

[0049] It should be noted that when the locking assembly 300 is in the first working state, the locking assembly 300 cooperates with the handle shell 100 to fix the connecting shaft 200, at this time, the connecting shaft 200 cannot rotate relative to the assembly hole 121 around the axis of the assembly hole 121, nor slide relative to the assembly hole 121 along the axis of the assembly hole 121. Conversely, when the locking assembly 300 is in the second working state, the locking assembly 300 loses the constraint on the connecting shaft 200, at this time, the connecting shaft 200 can rotate relative to the assembly hole 121 around the axis of the assembly hole 121, and can slide relative to the assembly hole 121 along the axis of the assembly hole 121.

[0050] It should be understood that the insertion tube body 001 can also be referred to as an insertion part.

[0051] The following embodiments illustrate the details of the insertion tube connecting structure of the present application by way of example.

[0052] Please refer to Figure 1 and Figure 3In this embodiment, the handle housing 100 optionally includes a housing body 110 and a knob 120. The knob 120 is provided with an assembly hole 121, and the assembly hole 121 has a front port and a rear port, wherein the front port is the end close to the patient when using the endoscope, and correspondingly, the rear port is the end close to the operator when using the endoscope. The knob 120 can be sleeved on the outside of the housing body 110 through structural parts such as bearings, and the knob 120 can be rotatably matched with the housing body 110 around its own axis. Alternatively, the knob 120 can be directly sleeved on the outside of the housing body 110 or inserted into the housing body 110, and it is sufficient to ensure that the knob 120 and the housing body 110 are rotatably matched. At the same time, in order to improve the stability of the position of the knob 120 relative to the housing body 110, the knob 120 and the housing body 110 are relatively fixed in the extension direction of the rotation axis of the knob 120.

[0053] It should be understood that the assembly hole 121 is provided on the knob 120, and the connecting shaft 200 can cooperate with the knob 120 through the locking assembly 300. By rotating the knob 120, the connecting shaft 200 and the insertion tube body 001 connected to the connecting shaft 200 can be driven to rotate, thereby realizing the adjustment of the front end direction of the insertion tube body 001, which is flexible to use.

[0054] Optionally, a fixing protrusion 130 is provided on the wall of the assembly hole 121. The fixing protrusion 130 can be configured as an annular protrusion, with the axis of the assembly hole 121 extending through the annular protrusion. For example, in this embodiment, the fixing protrusion 130 is annular, with the axis of the fixing protrusion 130 collinear with the axis of the assembly hole 121. The connecting shaft 200 extends through the area enclosed by both the assembly hole 121 and the fixing protrusion 130, and the connecting shaft 200 is rotatable relative to the assembly hole 121 and the fixing protrusion 130.

[0055] Please combine Figure 4 and Figure 5 In this embodiment, the connecting shaft 200 is optionally configured as a stepped shaft. The connecting shaft 200 includes a coaxial and integral first shaft section 210 and a second shaft section 220. The outer diameter of the first shaft section 210 is smaller than the outer diameter of the second shaft section 220. A limiting step 230 is formed at the connection position between the first shaft section 210 and the second shaft section 220. The outer peripheral surface of the first shaft section 210 is provided with an external thread. The end face of the first shaft section 210 is provided with a positioning hole 211. The positioning hole 211 includes a connected equal-diameter hole section and a variable-diameter hole section. The end of the variable-diameter hole section is the first end, and the end of the equal-diameter hole section is the second end. The inner diameter of the variable-diameter hole section gradually decreases in the direction from the first end to the second end. For example, the variable-diameter hole section is a conical hole section. The insertion tube body 001 can be inserted into the positioning hole 211 from the first end. The insertion tube body 001 first enters the variable-diameter hole section. The variable-diameter hole section has a guiding function, which is convenient for operation.

[0056] Optionally, the outer circumferential surface of the second shaft section 220 is provided with annular positioning grooves 221, the annular positioning grooves 221 are coaxially arranged on the second shaft section 220, and the number of the annular positioning grooves 221 can be one or more. When the number of the annular positioning grooves 221 is more than one, the plurality of annular positioning grooves 221 are arranged at intervals in the axial direction of the second shaft section 220. For example, in the embodiment, the number of the annular positioning grooves 221 is two. A sealing element 400 can be sleeved in each annular positioning groove 221, and the sealing element 400 can be a rubber sealing ring or the like.

[0057] Please refer to Figure 2 and Figure 4 In the embodiment, optionally, the locking assembly 300 includes a locking nut 310 and a locking washer 320. The locking nut 310 is screwed with the external thread on the first shaft section 210, and the locking washer 320 is sleeved on the first shaft section 210 and can abut against the limiting step 230.

[0058] It should be understood that the assembly method of the insertion tube connection structure provided in the embodiment includes, for example:

[0059] First, separate the locking nut 310 from the connecting shaft 200, and then sleeve the locking washer 320 on the first shaft section 210. Then, insert the first shaft section 210 into the assembly hole 121 from the rear end of the knob 120, and place the locking washer 320 between the limiting step 230 and the fixing protrusion 130, and place the sealing element 400 between the hole wall of the assembly hole 121 and the second shaft section 220, so as to seal the assembly hole 121. Then, screw the locking nut 310 on the first shaft section 210, and place the locking nut 310 on the side of the fixing protrusion 130 away from the locking washer 320. In this way, the locking washer 320 and the locking nut 310 cooperate to clamp the fixing protrusion 130. In the initial stage of assembly, the locking nut 310 does not cooperate with the locking washer 320 to clamp the fixing protrusion 130, and the connecting shaft 200 can rotate relative to the assembly hole 121 to achieve angle adjustment. After adjustment is completed, the connecting shaft 200 and the knob 120 are fixedly different, and the locking nut 310 is rotated to clamp the fixing protrusion 130 by the locking nut 310 and the locking washer 320, so as to fix the connecting shaft 200 and the knob 120.

[0060] It should be understood that in other embodiments, the handle shell 100 can not be provided with the knob 120, and the connecting shaft 200 can be fixed relative to the handle shell 100 in the circumferential direction of the handle shell 100 after being connected to the handle shell 100.

[0061] The insertion tube connecting structure provided by the embodiment can rotate the connecting shaft 200 as needed when connecting the connecting shaft 200 and the handle shell 100, thereby adjusting the direction of the insertion tube body 001 relative to the handle shell 100 through the connecting shaft 200, and the assembly is flexible and convenient, and the position is accurate and reliable. When fixing the insertion tube body 001 and the connecting shaft 200, the accuracy of the relative position of the insertion tube body 001 and the connecting shaft 200 does not need to be ensured, the assembly difficulty is reduced, and the assembly efficiency is improved.

[0062] Please combine Figure 1 The embodiment further provides an endoscope, which comprises an insertion tube body 001 and the insertion tube connecting structure, and one end of the insertion tube body 001 is fixedly connected with the connecting shaft 200. Specifically, the insertion tube body 001 is inserted into the positioning hole 211 of the connecting shaft 200, and the insertion tube body 001 and the connecting shaft 200 can be fixedly connected through epoxy AB glue.

[0063] The endoscope provided by the embodiment can adjust the position of the insertion tube body 001 relative to the handle shell 100 as needed during assembly, and the assembly is flexible and has low difficulty, the accuracy of the assembly position of the insertion tube body 001 is improved, and the yield is high.

[0064] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. An insertion tube connection structure, characterized in that: include: A handle shell (100), a connecting shaft (200) and a locking assembly (300), wherein the handle shell (100) is provided with an assembly hole (121), the connecting shaft (200) is inserted into the assembly hole (121), and the locking assembly (300) is connected to the connecting shaft (200); The locking assembly (300) has a first working state and a second working state that can be switched to each other. When in the first working state, the locking assembly (300) cooperates with the handle shell (100) to fix the connecting shaft (200) to limit the movement of the connecting shaft (200) relative to the assembly hole (121); when in the second working state, the connecting shaft (200) can rotate around its own axis relative to the assembly hole (121).

2. The insertion tube connection structure according to claim 1, wherein: A fixing protrusion (130) is provided on the hole wall of the assembly hole (121); a limiting step (230) is provided on the outer peripheral surface of the connecting shaft (200); the locking assembly (300) includes a locking nut (310), and the locking nut (310) is screwed to the outside of the connecting shaft (200); when the locking assembly (300) is in the first working state, the limiting step (230) cooperates with the locking nut (310) to clamp the fixing protrusion (130).

3. The insertion tube connection structure according to claim 2, wherein: The locking assembly (300) further includes a locking washer (320), which is sleeved on the outside of the connecting shaft (200). The locking washer (320) is located between the limiting step (230) and the fixing protrusion (130). The locking washer (320) is used to abut against the limiting step (230) and the fixing protrusion (130) on both sides of the connecting shaft (200) in the axial direction.

4. The insertion tube connection structure according to claim 2, wherein: The fixing protrusion (130) is configured as an annular protrusion, and the axis of the assembly hole (121) passes through the area enclosed by the annular protrusion.

5. The insertion tube connection structure according to any one of claims 1 to 4, characterized in that: The handle shell (100) includes a shell body (110) and a knob (120), wherein the knob (120) is rotatably matched with the shell body (110), and the knob (120) and the shell body (110) are relatively fixed in the axial direction of the knob (120); the assembly hole (121) is provided on the knob (120).

6. The insertion tube connection structure according to claim 1, wherein: A sealing member (400) is provided between the hole wall of the assembly hole (121) and the connecting shaft (200).

7. The insertion tube connection structure according to claim 6, characterized in that: An annular positioning groove (221) is provided on the outer peripheral surface of the connecting shaft (200), and the sealing member (400) is sleeved in the annular positioning groove (221).

8. An endoscope, characterized in that: The endoscope comprises: The insertion tube body (001) and the insertion tube connection structure according to any one of claims 1 to 7, wherein one end of the insertion tube body (001) is fixedly connected to the connection shaft (200).

9. The endoscope according to claim 8, characterized in that: The connecting shaft (200) is provided with a positioning hole (211), and the positioning hole (211) is provided with a reducing hole section, the inner diameter of the reducing hole section gradually decreases in the direction from the first end of the positioning hole (211) to the second end of the positioning hole (211), and the insertion tube body (001) is inserted into the positioning hole (211) from the first end.

10. The endoscope according to claim 8, characterized in that: The insertion tube body (001) and the connecting shaft (200) are bonded and fixed.

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