Snake bone pipe assembly and endoscope

Abstract

The utility model provides a snake bone pipe assembly which comprises a plurality of bone joints which are sequentially connected in the length direction of the snake bone pipe assembly, each bone joint comprises a bone joint tubular body and a plurality of bone joint connecting blocks, the two ends of each bone joint tubular body are each provided with the multiple bone joint connecting blocks which are distributed in the circumferential direction of the corresponding bone joint tubular body at intervals, and the bone joint connecting blocks are connected with the bone joint tubular bodies. A joint connecting groove is formed between every two adjacent joint connecting blocks. The joint connecting block of one of every two adjacent joints is located in the corresponding joint connecting groove in the other joint, and in the axis direction of the joint tubular body, the width of the end, away from the joint tubular body, of each joint connecting groove is smaller than that of the other end of the joint connecting groove. And a gap is formed between the bone joint connecting block and the bone joint connecting block which defines the bone joint connecting groove into which the bone joint connecting block is inserted. The utility model further discloses an endoscope. The large-angle bending device can reduce noise and meet the requirement for large-angle bending.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly relates to a snake bone tube assembly and an endoscope including the snake bone tube assembly. Background Art

[0002] With the continuous development of medical technology, endoscopes have been more and more widely used in the diagnosis and treatment of diseases. Generally, a medical snake bone tube is used to realize the steering of the endoscopic probe. The medical snake bone tube is composed of a series of bone joints, and the bone joints can rotate relative to each other to achieve the bending effect.

[0003] In the prior art, the connection structure between the bone joints of the snake bone tube generally needs to be connected by a connecting piece, and there are also some spiral connection structures between the bone joints. However, such bone joint connection structures are relatively complex, require more components, and have higher production and assembly costs. In addition, during actual use, the snake bone tube with the above structure will generate greater noise when bending, affecting the use experience. Summary of the Utility Model

[0004] The utility model aims to solve one of the technical problems in the related art to a certain extent. For this purpose, the utility model provides a snake bone tube assembly and an endoscope including the snake bone tube assembly. During use, the snake bone tube assembly can not only meet the requirement of large-angle bending but also have relatively low noise.

[0005] To achieve the above object, in a first aspect of the utility model, a snake bone tube assembly is disclosed. The snake bone tube assembly includes a plurality of bone joints sequentially connected along the length direction of the snake bone tube assembly. Each bone joint includes a bone joint tubular body and a plurality of bone joint connecting blocks. A plurality of the bone joint connecting blocks are circumferentially and spacedly arranged at both ends of the bone joint tubular body. The first end of the bone joint connecting block is fixedly connected to the bone joint tubular body, and a bone joint connecting groove is formed between adjacent two bone joint connecting blocks. The bone joint connecting blocks of one bone joint among adjacent two bone joints are located in the corresponding bone joint connecting grooves of the other bone joint. Along the axial direction of the bone joint tubular body, the width of the end of the bone joint connecting groove far from the bone joint tubular body is smaller than the width of the other end of the bone joint connecting groove, so as to limit the relative movement and relative rotation of the two mutually connected bone joints along the axial direction, and there is a gap between the bone joint connecting block and the bone joint connecting block that defines the bone joint connecting groove into which the bone joint connecting block is inserted.

[0006] Optionally, the bone joint connecting block includes a vertical portion and a horizontal portion. The first end of the vertical portion is connected to the end face of the bone joint tubular body, and the length direction of the vertical portion is consistent with the axial direction of the bone joint tubular body. The second end of the vertical portion is connected to the horizontal portion.

[0007] Optionally, the second end of the vertical portion is connected to the middle of the horizontal portion.

[0008] Optionally, the length of the vertical portion is greater than the width of the horizontal portion.

[0009] Optionally, the lengths of multiple bone joint tubular bodies are the same.

[0010] Optionally, the width of the gap between the bone joint connecting block and the bone joint connecting block that defines the bone joint connecting groove into which the bone joint connecting block is inserted is between 1 mm and 3 mm.

[0011] Optionally, the snake bone tube assembly further includes an end tube located at one end of the snake bone tube assembly, and the end tube is connected to the bone joint at one end of the snake bone tube assembly.

[0012] The end tube includes an end tubular body and a plurality of end connecting blocks. The plurality of end connecting blocks are circumferentially spaced apart at one end of the end tubular body. An end connecting groove is formed between two adjacent end connecting blocks, and along the axial direction of the end tubular body, the width of the end of the end connecting groove away from the end tubular body is smaller than the width of the other end of the end connecting groove.

[0013] The end connecting blocks of the end tube are inserted into the corresponding bone joint connecting grooves on adjacent bone joints, and the bone joint connecting blocks of the bone joints at the end are inserted into the end connecting grooves of adjacent end tubes. Moreover, there is a gap between the end connecting block and the bone joint connecting block that defines the bone joint connecting groove into which the end connecting block is inserted, and there is a gap between the bone joint connecting block and the end connecting block that defines the end connecting groove into which the bone joint connecting block is inserted.

[0014] Optionally, the dimension of the connecting block in the axial direction of the bone joint tubular body does not exceed one-third of the axial direction length of the bone joint tubular body.

[0015] As a second aspect of the present invention, there is provided an endoscope, which includes an inner tube, an endoscope probe, a snake bone tube assembly, and a supporting outer tube. The endoscope probe and the supporting outer tube are respectively connected to both ends of the snake bone tube assembly. Among them, the snake bone tube assembly is the snake bone tube assembly described in the first aspect of the present invention. The inner tube is arranged in the inner cavity of the snake bone tube assembly, and one end of the inner tube is connected to the endoscope probe.

[0016] Optionally, the endoscope further includes a soft sleeve sleeved outside the snake bone tube assembly.

[0017] The endoscope provided by the present utility model can be applied to more complex human tissues, improving the inspection range of the endoscope. In addition, by adjusting the clearance between the connection grooves and connection blocks in the snake bone tube assembly, it can meet the requirements of a larger bending angle. When the snake bone tube assembly bends, it can prevent the connection blocks from protruding too much and becoming sharp, reducing the risk of damaging human tissues.

[0018] These features and advantages of the present utility model will be disclosed in detail in the following specific embodiments and the accompanying drawings. The best embodiments or means of the present utility model will be shown in detail in combination with the drawings, but it is not a limitation to the technical solution of the present utility model. In addition, these features, elements, and components appear multiple times in the following text and drawings, and different symbols or numbers are marked for convenience of representation, but they all represent components with the same or similar structures or functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present utility model will be further described below in conjunction with the accompanying drawings:

[0020] Figure 1 Structural diagram of the connection of two bone joints of one embodiment of the present utility model;

[0021] Figure 2 Bone joint structure diagram of one embodiment of the present utility model;

[0022] Figure 3 Schematic diagram showing a partial view of the bone joint;

[0023] Figure 4 Schematic diagram of the bending state of the snake bone tube assembly of the present utility model;

[0024] Figure 5 Schematic diagram of the swing trajectory that can be generated when the snake bone tube assembly of the present utility model bends;

[0025] Figure 6 Structural diagram of the end portion tube.

[0026] DESCRIPTION OF THE REFERENCE NUMERALS

[0027] 10: Bone joint 11: Bone joint tubular body

[0028] 12: Bone joint connection groove 13: Bone joint connection block

[0029] 13a: Vertical portion 13b: Horizontal portion

[0030] 14: End face of the bone joint connection block 15: Side face of the bone joint connection block

[0031] 16: End portion tube 161: End portion tubular body

[0032] 162: End portion connection block 163: End portion connection groove Detailed implementation mode

[0033] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. Based on the embodiments in the implementation mode, it is intended to explain the present utility model and should not be construed as a limitation to the present utility model.

[0034] As used herein, the phrase "in one embodiment" or "instance" or "example" means that a particular feature, structure, or characteristic described in connection with the embodiment itself can be included in at least one embodiment of the present patent disclosure. The appearances of the phrase "in one embodiment" at various positions in the specification do not necessarily refer to the same embodiment.

[0035] As a first aspect of the present utility model, a snake bone tube assembly is provided, as Figure 1 shown. The snake bone tube assembly includes a plurality of sequentially connected bone joints 10. The bone joint 10 includes a bone joint tubular body 11 and a plurality of bone joint connecting blocks 13. As Figure 2 shown, a plurality of bone joint connecting blocks 13 are arranged at both ends of the bone joint tubular body 11 at intervals along the circumferential direction of the bone joint tubular body 11, and a bone joint connecting groove 12 is formed between two adjacent bone joint connecting blocks 13.

[0036] The bone joint connecting blocks 13 of one of the two adjacent bone joints 10 are located in the corresponding bone joint connecting grooves 12 of the other bone joint 10. And, as Figure 3 shown, along the axial direction of the bone joint tubular body 11, the width D1 of the end of the bone joint connecting groove 12 far from the bone joint tubular body 11 is smaller than the width D2 of the other end of the bone joint connecting groove 12, so as to limit the relative movement of the two mutually connected bone joints 10 along the axial direction and the relative rotation around the axial direction. And there is a gap between the bone joint connecting block 13 and the bone joint connecting block 13 that defines the bone joint connecting groove 12 into which the bone joint connecting block 13 is inserted.

[0037] The snake bone tube assembly provided by the embodiment of the present utility model is used in an endoscope. The structure of the bone joint 10 is simple, and the connection of the snake bone tube assembly along the axial direction can be realized only through the limiting effect between the bone joint connecting blocks 13. That is to say, the snake bone tube assembly provided by the implementation of the present utility model is more convenient for processing, thereby reducing the processing cost of the snake bone tube assembly.

[0038] In addition, there is a gap between the joint connecting block 13 and the joint connecting block 13 that defines the joint connecting groove 12 into which the joint connecting block 13 is inserted. During actual use, the two mutually connected joint connecting blocks 13 can move relative to each other through this gap, thereby enabling bending. Also, due to this gap, the friction between the two mutually connected joint connecting blocks 13 can be reduced, ultimately reducing the noise during use.

[0039] See Figure 1 , it can be seen that the connection between the joints 10 of the snake bone tube assembly in this embodiment is achieved by the mutual snap connection of the joint connecting groove 12 and the joint connecting block 13 structures, without the need to use other accessories (such as pins or screws, etc.), simplifying the structure of the snake bone tube assembly, facilitating the production of the joints 10, and also avoiding the risk of small-sized accessories falling off the snake bone tube assembly during use and remaining in the patient's body; in addition, both the joint connecting groove 12 and the joint connecting block 13 are arranged in a circumferential distribution, which is convenient for production and facilitates the control of processing accuracy, and further can reduce the noise generated during bending during use.

[0040] It should be noted that the specific shape of the joint connecting groove 12 can maintain the connection of the joint 10 along the length direction of the snake bone tube assembly. During actual use, an inner tube also needs to be provided in the inner cavity of the snake bone tube assembly, so as to further prevent the joint connecting block 13 from disengaging from the joint connecting groove 12 during the bending process.

[0041] In the embodiment of the present utility model, no special limitation is imposed on the specific structure of the joint connecting block 13. As shown in the figure, the joint connecting block 13 includes a vertical portion 13a and a horizontal portion 13b. The first end of the vertical portion 13a is connected to the end face of the joint tubular body 11, and the length direction of the vertical portion 13a is consistent with the axis direction of the joint tubular body 11. The length direction of the horizontal portion 13b intersects with the length direction of the vertical portion 13a, and the second end of the vertical portion 13a is connected to the horizontal portion 13b.

[0042] In the above-mentioned embodiment, on two adjacent joints 10, the corresponding horizontal portions 13b are mutually limited.

[0043] Optionally, to achieve a better limiting effect, the second end of the vertical portion 13a is integrally connected to the middle of the horizontal portion 13b.

[0044] As described above, there is a gap between the joint connecting block 13 and the joint connecting block 13 that defines the joint connecting groove 12 into which the joint connecting block 13 is inserted. Correspondingly, the length of the vertical portion 13a is greater than the width of the horizontal portion 13b.

[0045] That is to say, in the embodiment of the present utility model, the joint connection block 13 can be "T"-shaped, and the joint connection groove 12 can be "convex"-shaped. The symmetric characteristics of the "T"-shape make the connection between two adjacent joints 10 more stable and the connection effect better when they are engaged with each other.

[0046] Although only the "T"-shaped joint connection block 13 is shown in the figure, however, the present utility model is not limited thereto. For example, the joint connection block 13 can also be "L"-shaped.

[0047] In the embodiment of the present utility model, the joint connection groove 12 can also be "L"-shaped or "dovetail"-shaped.

[0048] As Figure 2 shown, in order to ensure the stability of the snake bone tube assembly formed by the engaged connection with each other, the joint connection block end face 14 of the joint connection block can be a plane. When two joints 10 are engaged with each other, the joint connection block end face 14 of the joint connection block 13 of one joint 10 is opposite to the joint connection block end face 14 of the joint connection block 13 of the other joint 10. When the joint 10 is subjected to a tensile force in the axial direction, the two opposite joint connection block end faces 14 can stop each other to limit the relative movement of the two connected joints 10 along the axis direction of the joint tubular body 11. The mutual stop of the two joint connection block end faces 14 makes the snake bone tube assembly not separate in the axial direction between adjacent joints 10 when subjected to an axial tensile force, ensuring the integrity and stability of the snake bone tube assembly during bending or stretching in the use process and achieving a better use effect.

[0049] As described above, in actual use, an inner tube needs to be provided inside the snake bone tube assembly to prevent the joint 10 from radially coming out. In one embodiment of the present utility model, the joint connection block side face 15 of the joint connection block 13 is a plane. When two joints 10 are engaged with each other, the joint connection block side face 15 of the joint connection block 13 of one joint 10 is opposite to the joint connection block side face 15 of the joint connection block 13 of the other joint 10. When the joint 10 is subjected to a tangential force, the two opposite joint connection block side faces 15 can stop each other to limit the relative rotation of the two connected joints 10 along the circumferential direction of the joint tubular body 11. The structural setting in this embodiment enables the snake bone tube assembly to rotate together when subjected to a tangential force, which helps the transmission of the torque and facilitates the angle adjustment of the endoscope probe. It should be noted that the limitation of the relative rotation of adjacent two joints 10 in the circumferential direction mentioned in this embodiment does not mean that the two joints 10 cannot rotate relatively in an absolute sense. Since there is a gap between the joint connection blocks 13, in actual use, within the gap range, adjacent two joints 10 will still generate a small relative rotation angle.

[0050] The larger the gap between the mutually engaged joint connecting blocks 13, the easier it is to bend the snake bone tube assembly, and the larger the maximum bending angle that can be bent (the larger the value of N). Correspondingly, the stability of the assembled snake bone tube assembly will be reduced.

[0051] In the embodiment of the present utility model, after the joint connecting block 13 is inserted into the joint connecting groove 12, the gap between the joint connecting block 13 and the joint connecting block 13 that defines the joint connecting groove 12 into which the joint connecting block 13 is inserted can be between 1 mm and 3 mm, so as to ensure the stability of the snake bone tube assembly and reduce the noise during the operation process.

[0052] The smaller the gap, the tighter the connection between the mutually engaged joint connecting blocks 13 and the joint connecting grooves 12, and the better the overall stability of the snake bone tube assembly, but the bendable characteristic will be reduced (that is, the larger the value of N). In one embodiment of the present utility model, the gap between the mutually engaged joint connecting blocks 13 and the joint connecting grooves 12 is 2 mm. At this time, the snake bone tube assembly has both stability and bendable characteristics, and on the premise of ensuring the overall stability of the snake bone tube assembly, the snake bone tube assembly has a larger bendable angle (that is, the smaller the value of N).

[0053] It should be noted that the structure of the circumferentially distributed joint connecting grooves 12 and joint connecting blocks 13 in this embodiment has a larger bending angle than the spiral structure during use. This is because when the snake bone tube assembly in this embodiment is bent, the gaps between the mutually engaged joint connecting blocks 13 can be concentrated on the same side, thereby increasing the maximum bending angle. Therefore, it can be imagined that the factors affecting the maximum bending angle of the snake bone tube assembly in this embodiment are the gap between the mutually engaged joint connecting blocks 13 and the number of joints 10 (the more the number, the more the connecting block positions, and correspondingly the more the number of gaps, and thus the larger the total gap that can be accumulated). Therefore, during actual design, the maximum bending angle can be adjusted by controlling the gap between the mutually engaged joint connecting grooves 12 and joint connecting blocks 13 and the number of joints 10.

[0054] See Figure 4 , the structure of the snake bone tube assembly in this embodiment can achieve a 360° swing along the arrow direction while being bent to a certain angle at one end, improving the coverage range during use.

[0055] In this embodiment, the bone joint connecting block 13 is naturally formed during the processing of the bone joint connecting groove 12. In this way, the generation of the bone joint connecting groove 12 and the bone joint connecting block 13 is completed in one processing, improving the processing efficiency and reducing the production cost. During actual production, the bone joint connecting groove 12 and the bone joint connecting block 13 can be formed by integral laser centripetal cutting, which can ensure the coaxiality of multiple bone joints 10. The width of the laser cutting seam during processing forms the gap between the bone joint connecting groove 12 and the bone joint connecting block 13. It should be noted that by using laser centripetal cutting, the snake bone tube assembly does not need to be assembled. After laser cutting, a snake bone tube assembly with a multi-joint structure is naturally formed, further improving the production efficiency.

[0056] In one embodiment of the present utility model, the lengths of multiple bone joints 10 in the axial direction are equal, forming a snake bone tube assembly with equal joint lengths. This not only facilitates processing and the setting of the laser cutting program, but also through this setting, when the snake bone tube assembly is bent, the bending arcs of each bone joint 10 remain consistent, avoiding the problem of sharp protrusions at the connection parts caused by inconsistent lengths from damaging the human body. Of course, it can be imagined that the length of each bone joint 10 can be set according to requirements. The smaller the length of each bone joint 10, the flatter the protrusion at the end of the bone joint 10 during the bending process. Moreover, the more the number of bone joints 10 of the snake bone tube assembly with the same length, the larger the maximum angle at which the snake bone tube assembly can be bent.

[0057] Optionally, to ensure that the bone joint 10 has sufficient strength, the dimension of the connecting block in the axial direction of the bone joint tubular body 11 does not exceed one-third of the axial direction length of the bone joint tubular body 11.

[0058] As Figure 5 and Figure 6 shown, the snake bone tube assembly of the present utility model further includes an end tube 16 located at one end of the snake bone tube assembly, and the end tube 16 is connected to the bone joint 10 at one end of the snake bone tube assembly.

[0059] As Figure 6 shown, the end tube 16 includes an end tubular body 161 and a plurality of end connecting blocks 162. The plurality of end connecting blocks 162 are arranged at intervals in the circumferential direction at one end of the end tubular body 161. An end connecting groove 163 is formed between adjacent two end connecting blocks 162. Along the axial direction of the end tubular body 161, the width of the end of the end connecting groove 163 far from the end tubular body 161 is smaller than the width of the other end of the end connecting groove 163.

[0060] The end connection block 162 of the end tube 16 is inserted into the corresponding joint connection groove 12 on the adjacent joint 10, and the joint connection block 13 of the end joint 10 is inserted into the end connection groove 163 of the adjacent end tube 16. Moreover, there is a gap between the end connection block 162 and the joint connection block 13 that defines the joint connection groove 12 into which the end connection block is inserted, and there is a gap between the joint connection block and the end connection block 162 that defines the end connection groove into which the joint connection block is inserted.

[0061] The structure of the end connection block 162 may be the same as that of the joint connection block 13, and the shape of the end connection groove 163 may be the same as that of the joint connection groove 12, which will not be elaborated here.

[0062] The second aspect of the present utility model discloses an endoscope, which includes an inner tube, an endoscope probe, and the snake bone tube assembly of the first aspect of the embodiment of the present utility model. One end of the snake bone tube assembly is connected to the endoscope probe, and the other end of the snake bone tube assembly is connected to the support outer tube. The inner tube is inserted into the snake bone tube assembly and is connected to the endoscope probe at one end.

[0063] Optionally, the endoscope further includes a soft sleeve sleeved outside the snake bone tube assembly. On the one hand, the soft sleeve can prevent the snake bone tube assembly from directly contacting the human body and avoid the gap of the snake bone tube assembly clamping human tissues during the bending process. On the other hand, the soft sleeve can buffer the sharp protrusion of the snake bone tube assembly during the bending process, better protect the human body, and avoid damage to the human body.

[0064] The endoscope in the present utility model adopts the snake bone tube assembly disclosed in the first aspect. Moreover, when subjected to an external force, it can not only bend to a certain angle, but also realize the head swing. See the appendix Figure 4 and can be applied to more complex human tissues, improving the detection range of the endoscope.

[0065] In addition, through the adjustment of the matching gap between the joint connection groove 12 and the joint connection block 13 in the snake bone tube assembly, the requirement of a larger bending angle can be adapted. Moreover, with the design of the equal axis length structure, when the snake bone tube assembly bends, the joint connection block 13 can be prevented from protruding too much and becoming sharp, reducing the risk of damaging human tissues.

[0066] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that the present utility model includes but is not limited to the content described in the drawings and the above specific implementation manner. Any modification that does not deviate from the functional and structural principles of the present utility model will be included in the scope of the claims.

Claims

1. A snake bone tube assembly, characterized in that, The snake bone tube assembly includes a plurality of bone joints (10) sequentially connected along the length direction of the snake bone tube assembly. The bone joint (10) includes a bone joint tubular body (11) and a plurality of bone joint connecting blocks (13). At both ends of the bone joint tubular body (11), a plurality of the bone joint connecting blocks (13) are arranged at intervals along the circumferential direction of the bone joint tubular body (11). A bone joint connecting groove (12) is formed between two adjacent bone joint connecting blocks (13); the bone joint connecting blocks (13) of one bone joint (10) among two adjacent bone joints (10) are located in the corresponding bone joint connecting grooves (12) of the other bone joint (10). Along the axial direction of the bone joint tubular body (11), the width of one end of the bone joint connecting groove (12) far from the bone joint tubular body (11) is smaller than the width of the other end of the bone joint connecting groove (12), so as to limit the relative movement in the axial direction and the relative rotation around the axial direction of the two mutually connected bone joints (10), and there is a gap between the bone joint connecting block (13) and the bone joint connecting block (13) that defines the bone joint connecting groove (12) into which the bone joint connecting block is inserted.

2. The snake bone tube assembly according to claim 1, characterized in that, The bone joint connecting block (13) includes a vertical portion (13a) and a horizontal portion (13b). The first end of the vertical portion (13a) is connected to the end face of the bone joint tubular body (11), and the length direction of the vertical portion (13a) is consistent with the axial direction of the bone joint tubular body (11). The length direction of the horizontal portion (13b) intersects with the length direction of the vertical portion (13a), and the second end of the vertical portion (13a) is connected to the horizontal portion (13b).

3. The snake bone tube assembly according to claim 2, wherein, The second end of the vertical portion (13a) is connected to the middle of the horizontal portion (13b).

4. The snake bone tube assembly according to claim 2, characterized in that, The length of the vertical portion (13a) is greater than the width of the horizontal portion (13b).

5. The snake bone tube assembly according to any one of claims 1 to 4, characterized in that, The lengths of the plurality of bone joint tubular bodies (11) are the same.

6. The snake bone tube assembly according to any one of claims 1 to 4, characterized in that, The width of the gap between the bone joint connecting block (13) and the bone joint connecting block (13) that defines the bone joint connecting groove (12) into which the bone joint connecting block (13) is inserted is between 1 mm and 3 mm.

7. The snake bone tube assembly according to any one of claims 1 to 4, characterized in that, The snake bone tube assembly further includes an end tube (16) located at one end of the snake bone tube assembly. The end tube (16) is connected to the bone joint (10) at one end of the snake bone tube assembly. The end tube (16) includes an end tubular body (161) and a plurality of end connecting blocks (162). The plurality of end connecting blocks (162) are arranged at intervals along the circumferential direction at one end of the end tubular body (161). An end connecting groove (163) is formed between two adjacent end connecting blocks (162). Along the axial direction of the end tubular body (161), the width of one end of the end connecting groove (163) far from the end tubular body (161) is smaller than the width of the other end of the end connecting groove (163). The end connection block (162) of the end tube (16) is inserted into the corresponding joint connection groove (12) on the adjacent joint (10), and the joint connection block (13) of the joint (10) at the end is inserted into the end connection groove (163) of the adjacent end tube (16). Moreover, there is a gap between the end connection block (162) and the joint connection block (13) that defines the joint connection groove (12) into which the end connection block is inserted, and there is a gap between the joint connection block and the end connection block (162) that defines the end connection groove into which the joint connection block is inserted.

8. The snake bone tube assembly according to any one of claims 1 to 4, characterized in that, The dimension of the connection block in the axial direction of the joint tubular body (11) does not exceed one-third of the length of the joint tubular body (11) in the axial direction.

9. An endoscope, the endoscope comprising an inner tube, an endoscopic probe, a snake bone tube assembly, and a supporting outer tube, wherein the endoscopic probe and the supporting outer tube are respectively connected to two ends of the snake bone tube assembly, and characterized in that, The snake bone tube assembly is the snake bone tube assembly according to any one of claims 1 to 7. The inner tube is arranged in the inner cavity of the snake bone tube assembly, and one end of the inner tube is connected to the endoscope probe, and one end of the snake bone tube assembly is also connected to the endoscope probe.

10. The endoscope according to claim 9, characterized in that, The endoscope further includes a soft sleeve sleeved outside the snake bone tube assembly.

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