A snake bone, insertion part and endoscope

Abstract

This application relates to the field of endoscope technology, specifically to a snake-shaped frame, an insertion part, and an endoscope. The snake-shaped frame includes multiple snake-shaped frame units connected end to end. Two opposing first connecting parts are provided between the snake-shaped frame units and adjacent snake-shaped frame units. The two opposing first connecting parts are distributed radially along the snake-shaped frame units. The snake-shaped frame units are rotatably connected to adjacent snake-shaped frame units through the first connecting parts. The snake-shaped frame units are provided with a first opening and a second opening at both ends of their axial direction. The first connecting part connecting the snake-shaped frame units passes through the second opening of the adjacent snake-shaped frame unit and the first opening of the snake-shaped frame unit in sequence before connecting to the adjacent snake-shaped frame unit. In the above solution, the first opening and the second opening are provided at both ends of the axial direction of the snake-shaped frame unit, so that the first connecting part can extend within the first opening of the snake-shaped frame unit and the second opening of the adjacent snake-shaped frame unit. When the snake-shaped frame unit deflects relative to the adjacent snake-shaped frame unit, the local deformation of the first connecting part is small and it is not easy to suffer bending fatigue or fracture.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of endoscopes, and in particular to a snake bone, an insertion part and an endoscope. BACKGROUND

[0002] An endoscope is a commonly used medical instrument, which comprises an operation handle and an insertion part. The insertion part can enter the human body through a body cavity or a surgical incision. By pulling a lever on the operation handle, the posture of a main bending section at the distal end of the insertion part can be adjusted. A camera module at the distal end of the insertion part can observe the internal tissues of the human body, helping doctors to determine the lesion position in the patient's body and the tissue structure characteristics of the lesion position.

[0003] In the related art, the distal end of the insertion part has a main bending section, which can be composed of an integrally injection-molded snake bone. The main bending section can be actively bent by pulling a traction rope. However, the integrally injection-molded snake bone is prone to bending fatigue or even breakage after multiple uses, resulting in poor bending stability of the main bending section and poor reliability of bending control of the main bending section. SUMMARY

[0004] Embodiments of the present application disclose a snake bone, an insertion part and an endoscope to solve the technical problems of poor bending stability and poor bending control reliability of the integrally injection-molded snake bone in the related art.

[0005] To solve the above problems, the embodiments of the present application adopt the following technical solutions:

[0006] In a first aspect, the embodiments of the present application provide a snake bone, comprising a plurality of snake bone units connected end to end, two opposite first connecting parts are arranged between the snake bone unit and the adjacent snake bone unit, the two opposite first connecting parts are distributed along the radial direction of the snake bone unit, and the snake bone unit and the adjacent snake bone unit are rotationally connected through the first connecting part.

[0007] The snake bone unit is provided with a first opening and a second opening at both ends in the axial direction, and the first connecting part connecting the snake bone units passes through the second opening of the adjacent snake bone unit and the first opening of the snake bone unit in sequence and is connected with the adjacent snake bone unit.

[0008] Further, the first connecting part comprises a first connecting section, a first winding section, a second winding section and a second connecting section connected in sequence, the first connecting section connects the snake bone unit, and the second connecting section connects the adjacent snake bone unit.

[0009] The first winding section is matched with the inner wall of the second opening of the adjacent snake bone unit, and the first winding section and the inner wall of the second opening of the adjacent snake bone unit have a first gap therebetween.

[0010] And / or, the second winding is adapted to the inner wall of the first opening of the snake-bone unit, and there is a second gap between the second winding and the inner wall of the first opening of the snake-bone unit.

[0011] Furthermore, the connection point between the first winding segment and the second winding segment is located between the first connecting segment and the second connecting segment, and a first clearance space is formed between the first connecting segment and the first winding segment, and a second clearance space is formed between the second connecting segment and the second winding segment.

[0012] Furthermore, the first winding segment includes a first winding segment base and a first winding segment protrusion radially protruding from the first winding segment base, the first winding segment protrusion being disposed adjacent to the first connecting segment.

[0013] Furthermore, the second winding segment includes a second winding segment base and a second winding segment protrusion that radially protrudes from the second winding segment base, the second winding segment protrusion being disposed adjacent to the second connecting segment.

[0014] Furthermore, the first winding and / or the second winding are in an arc-shaped configuration.

[0015] Furthermore, in the circumferential direction of the snake-bone unit, the first opening and the second opening at least partially overlap.

[0016] Furthermore, the snake-bone unit is provided with a receiving space extending along its axial direction, and a partition wall unit extending along its axial direction is provided inside the snake-bone unit. The partition wall unit divides the receiving space into an instrument lumen and a wire harness lumen. Two adjacent partition wall units are connected by a second connecting part, and the second connecting part has the same structure as the first connecting part.

[0017] Secondly, embodiments of this application also provide an insertion portion, including the aforementioned snake bone.

[0018] Thirdly, embodiments of this application also provide an endoscope, which includes the aforementioned insertion portion.

[0019] The technical solution adopted in the embodiments of this application can achieve the following beneficial effects:

[0020] In the snake bone, insertion part and endoscope disclosed in the embodiments of this application, a first opening and a second opening are provided at both ends of the axial direction of the snake bone unit, and a first connecting part can be extended around the first opening and the second opening. In this way, without changing the distance between the snake bone unit and the adjacent snake bone unit, the extension length of the first connecting part is significantly increased.

[0021] When a snake-bone unit deflects relative to an adjacent snake-bone unit, on the one hand, because the distance between the snake-bone unit and the adjacent snake-bone unit remains unchanged, the snake-bone unit can still be supported by the first connecting part and abut against the adjacent snake-bone unit, thereby improving the reliability of the entire snake-bone bending. On the other hand, because the extension length of the first connecting part is increased, even if the snake-bone undergoes a large bending amplitude, the deformation per unit length of the first connecting part is small, making it difficult for the first connecting part to experience bending fatigue. Even if the entire snake-bone undergoes multiple bending, the first connecting part has a good ability to recover deformation. In other words, the first connecting part is not prone to bending fatigue or even fracture, thereby significantly improving the bending stability and bending control reliability of the active bending segment. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is one of the schematic diagrams of the snake skeleton structure in the embodiments of this application;

[0024] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle;

[0025] Figure 3 This is a second schematic diagram of the snake skeleton structure according to an embodiment of this application;

[0026] Figure 4 This is a schematic diagram showing the separation between the instrument lumen and the wire harness lumen of the snake bone according to an embodiment of this application;

[0027] Figure 5 This is the third schematic diagram of the snake skeleton structure in the embodiments of this application;

[0028] Figure 6 yes Figure 5 A magnified view of a portion of point B in the middle;

[0029] Figure 7 This is the fourth schematic diagram of the snake skeleton structure in the embodiments of this application;

[0030] Figure 8 yes Figure 7 A magnified view of a portion of point C.

[0031] In the picture:

[0032] 100 - Snake bone, 110 - First connecting part, 111 - First connecting segment, 112 - First winding segment, 112a - First winding segment base, 112b - First winding segment protrusion, 113 - Second winding segment, 113a - Second winding segment base, 113b - Second winding segment protrusion, 114 - Second winding segment, 120 - Second connecting part, 130 - First opening, 131 - Second gap, 132 - Second clearance space, 140 - Second opening, 141 - First gap, 142 - First clearance space, 150 - Accommodation space, 160 - Partition wall unit; 170 - Turning cut. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0034] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0035] In the various embodiments of this application, "proximal end" and "distal end" refer to the position of the endoscope and its accessories relative to the user in the usage environment. 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."

[0036] In related technologies, the active bending section of an endoscope is typically composed of a snake-like skeleton. This skeleton can be formed by riveting together multiple skeleton units or by integral injection molding. For integrally injection-molded skeletons, two adjacent skeleton units are connected by a connecting part. During their research, the inventors discovered that in integrally injection-molded skeletons, the connecting part between two adjacent skeleton units is prone to fatigue and reduced strength after repeated bending deformation. When the traction rope pulls the skeleton to a significant bending angle, the two skeleton units approach and are compressed, causing the connecting part to be flattened and unable to provide effective support for the skeleton units. This results in the active bending section failing to achieve the desired bending effect. Furthermore, when the traction rope is further applied with traction force, the integrally injection-molded skeleton is prone to breakage. In other words, the active bending section formed by integral injection molding has low bending stability and low reliability in controlling the bending of the active bending section.

[0037] In this regard, some embodiments of this application provide a snake skeleton for use in an endoscope, which is described below in conjunction with the accompanying drawings. Figures 1-8 The snake bone, insertion part, and endoscope provided in this application are described through specific embodiments and application scenarios.

[0038] Please see Figures 1-2 This application discloses a snake skeleton comprising multiple snake skeleton units 100 connected end-to-end. Each snake skeleton unit 100 has a tubular structure. Two opposing first connecting portions 110 are provided between each snake skeleton unit 100 and its adjacent counterparts. The two opposing first connecting portions 110 are distributed along the radial direction of the snake skeleton unit 100, and the snake skeleton unit 100 and its adjacent counterparts are rotatably connected through the first connecting portions 110. Specifically, a turning slit 170 is provided between each snake skeleton unit 100 and its adjacent counterparts. The multiple turning slits 170 are distributed along the axial direction of the snake skeleton. When the snake skeleton is bent by the traction rope, in any two adjacent snake skeleton units 100, the distal snake skeleton unit 100 can deflect into the turning slit 170, thereby causing the entire snake skeleton to bend in a predetermined direction.

[0039] Please see Figure 2 The snake bone unit 100 has a first opening 130 and a second opening 140 at both ends of its axial direction. The first connecting part 110 connecting the snake bone unit 100 passes through the second opening 140 of the adjacent snake bone unit 100 and the first opening 130 of the snake bone unit 100 in sequence, and then connects to the adjacent snake bone unit 100.

[0040] A first opening 130 and a second opening 140 are provided at both ends of the axial direction of the snake bone unit 100. The first connecting part 110 can extend around the first opening 130 and the second opening 140. In this way, without changing the distance between the snake bone unit 100 and the adjacent snake bone unit 100, the extension length of the first connecting part 110 is significantly increased.

[0041] Based on the above technical solution, when the snake bone unit 100 deflects relative to the adjacent snake bone unit 100, on the one hand, because the distance between the snake bone unit 100 and the adjacent snake bone unit 100 remains unchanged, the snake bone unit 100 can still be supported by the first connecting part 110 and abut against the adjacent snake bone unit 100, thereby improving the reliability of the entire snake bone bending; on the other hand, because the extension length of the first connecting part 110 is increased, even if the snake bone undergoes a large bending amplitude, the deformation per unit length of the first connecting part 110 is small. In this way, the first connecting part 110 is unlikely to experience bending fatigue, and even if the entire snake bone undergoes multiple bending, the first connecting part 110 has a good ability to recover deformation. That is to say, the first connecting part 110 is not prone to bending fatigue or even fracture, thereby significantly improving the stability of the bending of the active bending section and the reliability of bending control.

[0042] It should be noted that in the embodiments of this application, the two opposing first connecting portions 110 are distributed along the radial direction of the snake bone unit 100. The radial direction referred to herein is not limited to the radial direction passing through the axis of the snake bone unit 100, but can also be the chord extension direction of the snake bone unit 100.

[0043] Please continue reading Figure 2 The first connecting part 110 includes a first connecting segment 111, a first winding segment 112, a second winding segment 113, and a second connecting segment 114. The first connecting segment 111 connects to the snake bone unit 100, the second connecting segment 114 connects to the adjacent snake bone unit 100, and the first winding segment 112 and the second winding segment 113 are connected to form the extension path of the first connecting part 110.

[0044] During the research process, the inventors discovered that because the snake bone unit 100 needs to bend in two opposite directions relative to the adjacent snake bone unit 100, the force direction of the first winding segment 112 and the second winding segment 113 will also change accordingly when the bending direction of the snake bone changes. In other words, the first winding segment 112 and the second winding segment 113 will undergo both tensile deformation and compressive deformation.

[0045] In one optional embodiment, the first winding segment 112 is adapted to the inner wall of the second opening 140 of the adjacent snake bone unit 100, and there is a first gap 141 between the first winding segment 112 and the inner wall of the second opening 140. When the snake bone unit 100 rotates relative to the adjacent snake bone unit 100, the first gap 141 can provide deformation space for the tension deformation of the first winding segment 112. At the same time, the inner wall of the second opening 140 can also play a restraining role on the tension deformation of the first winding segment 112 to prevent it from being over-deformed.

[0046] It should be understood that, since the first winding 112 and the second winding 113 are respectively located at the first opening 130 and the second opening 140, the deformation state of the second winding 113 is opposite to that of the first winding 112. That is, when the first winding 112 undergoes tension deformation, the second winding 113 undergoes compressive deformation, and when the first winding 112 undergoes compressive deformation, the second winding 113 undergoes tension deformation.

[0047] Based on this situation, the second winding 113 is adapted to the inner wall of the first opening 130 of the snake bone unit 100, and there is a second gap 131 between the second winding 113 and the inner wall of the first opening 130 of the snake bone unit 100. The second gap 131 can provide deformation space for the tension deformation of the second winding 113, and the inner wall of the first opening 130 can also play a role in resisting and constraining the second winding 113.

[0048] In the embodiments of this application, the division between the first winding segment 112 and the second winding segment 113 can be based on the midpoint between the snake-bone unit 100 and the adjacent snake-bone unit 100, or the dividing point can be used as the connection point between the first winding segment 112 and the second winding segment 113. In a further technical solution, a first clearance space 142 is formed between the first connecting segment 111 and the first winding segment 112. The first clearance space 142 is located inside the first winding segment 112. When the first winding segment 112 is deformed under pressure, it can deform into the first clearance space 142. Similarly, a second clearance space 132 is formed between the second winding segment 113 and the second connecting segment 114. The second clearance space 142 is located inside the second winding segment 113. When the second winding segment 113 is deformed under pressure, it can deform into the second clearance space 132.

[0049] In some embodiments of this application, please refer to... Figure 2The first winding segment 112 can be arc-shaped, and the second winding segment 113 can also be arc-shaped. The first clearance space 142 can be a roughly enclosed space formed by the first connecting segment 111 and the first winding segment 112. The aforementioned second gap 131 is connected to the first clearance space 142. Similarly, the second clearance space 132 can be a roughly enclosed space formed by the second winding segment 113 and the second connecting segment 114. The aforementioned first gap 141 is connected to the second clearance space 132. In this way, the entire first connecting part 110 is roughly figure-eight shaped, which fully extends the extension length of the first connecting part 110. When the snake bone unit 100 deflects at a large angle relative to the adjacent snake bone unit 100, the deformation per unit length of the first connecting part 110 is minimal. This also makes the first connecting part 110 less prone to bending fatigue or even breakage, further ensuring the stability of the bending of the active bending segment and the reliability of controlling its bending.

[0050] Please refer to section 2. The first opening 130 and the second opening 140 can be approximately circular. The first winding segment 112 and the second winding segment 113 are both arc-shaped. Since the first winding segment 112 and / or the second winding segment 113 both adopt arc-shaped structures, when the first winding segment 112 and / or the second winding segment 113 undergo bending deformation, the deformation of the first winding segment 112 and / or the second winding segment 113 is relatively uniform, which can avoid the situation where the first connecting part 110 has excessive local stress, making that local position prone to fatigue.

[0051] In a further technical solution, the first connecting segment 111 has a first abutment portion 111a facing the second connecting segment 114, and the second connecting segment 114 has a second abutment portion 114a facing the first connecting segment 111. The shape of the first abutment portion 111a and the shape of the second abutment portion 114a match the extension path of the connecting portion 110. The first abutment portion 111a and the second abutment portion 114a define the extension path at the junction of the first winding segment 112 and the second winding segment 113. When the first connecting portion 110 undergoes bending deformation, the first abutment portion 111a or the second abutment portion 114a can support the junction, thereby ensuring the support performance of the entire first connecting portion 110.

[0052] During the research process, the inventors discovered that if both the first winding segment 112 and the second winding segment 113 are arc-shaped and their widths within the first opening 130 and the second opening 140 are consistent, the entire first connecting portion 110 exhibits excellent flexibility. However, with this construction method, when the snake bone unit 100 deflects relative to the adjacent snake bone unit 100, the support strength of the first connecting portion 110 is inevitably weakened, that is, the support performance of the first connecting portion 110 is relatively weak.

[0053] In this case, please refer toFigures 5-8 In some embodiments of this application, the first winding segment 112 may include a first winding base 112a and a first winding protrusion 112b radially protruding from the first winding base 112a. The first winding protrusion 112b protrudes radially inward relative to the first winding base 112a. The first winding protrusion 112b is disposed adjacent to the first connecting segment 111. For ease of explanation, in Figure 6 and Figure 8 In the diagram, auxiliary dashed lines are introduced to distinguish the first connecting segment 111, the first winding base 112a, and the first winding protrusion 112b. By setting the first winding protrusion 112b, the structural strength of the first winding 112 adjacent to the first connecting segment 111 is increased, so that the first connecting part 110 can also provide good support for the snake bone unit 100.

[0054] In a further technical solution, along the extension path of the first connecting portion 110, the width of the first winding protrusion 112b gradually decreases until it is the same as the width of the first winding base 112a. In this way, the support performance of the first winding 112 is improved by setting the first winding protrusion 112b, while the part of the first winding 112 without the first winding protrusion 112b can ensure the flexibility of the first winding 112, thus achieving a balance between flexibility and support performance.

[0055] In some embodiments of this application, the second winding segment 113 may include a second winding segment base 113a and a second winding segment protrusion 113b that protrudes radially from the second winding segment base 113a. The second winding segment protrusion 113b protrudes radially inward relative to the second winding segment base 113a. The second winding segment protrusion 113b is disposed adjacent to the second connecting segment 114. On the one hand, this increases the structural strength of the second winding segment 113 adjacent to the second connecting segment 114, ensuring its support performance. On the other hand, it also ensures the flexibility of the second winding segment 113, making it less prone to fatigue or even breakage.

[0056] In a further technical solution, along the extension path of the first connecting portion 110, the width of the second winding protrusion 113b gradually increases until it connects with the second connecting portion 114, thereby enabling the second winding 113 to take into account both flexibility and support performance.

[0057] It should be understood that, please refer to Figure 2 , Figure 6 and Figure 8 The dimensions of the first winding protrusion 112b and the second winding protrusion 113b can be adaptively adjusted according to the bending performance requirements of the snake bone, so that the formed first clearance space 142 or second clearance space 132 can be a variety of shapes such as circular, elliptical or even crescent-shaped. This application does not impose specific restrictions on this.

[0058] In the embodiments of this application, the first opening 130 and the second opening 140 at least partially overlap in the circumferential direction of the snake-bone unit 100. That is, the first opening 130 and the second opening 140 can completely overlap or partially overlap in the circumferential direction of the snake-bone unit 100. In a preferred embodiment, the first opening 130 and the second opening 140 partially overlap. In this way, on the one hand, it is beneficial to extend the extension path of the first connecting portion 110; on the other hand, compared with the method where the first opening 130 and the second opening 140 completely overlap in the circumferential direction of the snake-bone unit 100, the first connecting segment 111 and the second connecting segment 114 have a larger width dimension, thereby ensuring the support strength of the first connecting segment 111 and the second connecting segment 114.

[0059] For some embodiments of this application, please refer to Figure 3 and Figure 4 The snake-bone unit 100 is provided with a receiving space 150 extending along its axis. A partition wall unit 160 extending along its axis is provided inside the snake-bone unit 100. The partition wall unit 160 divides the receiving space 150 into an instrument lumen 151 and a wire harness lumen 152. The instrument lumen 151 is used to house the instrument tube of the endoscope, and the wire harness lumen 152 is used to house the wire harness connecting the remote module. The remote module can be a camera module and / or an illumination module.

[0060] The partition wall unit 160 of the snake bone unit 100 is connected to the partition wall unit of the adjacent snake bone unit 100 through the second connecting part 120. Multiple partition wall units 160 are connected to form a partition wall. The second connecting part 120 has the same structure as the first connecting part 110. When the snake bone unit 100 deflects relative to the adjacent snake bone unit 100, the partition wall can also bend synchronously with the snake bone. This avoids the partition wall bending state being uncertain and encroaching on the instrument lumen 151 or the wire harness cavity 152, causing a reduction in the passage size of the instrument tube, or causing the inner wall of the wire harness cavity 152 to clamp and pull the wire harness.

[0061] This application also provides an insertion part, including the aforementioned snake bone.

[0062] This application also provides an endoscope, including an endoscope handle and the aforementioned insertion part. The proximal end of the insertion part is connected to the endoscope handle, and the bending action of the active bending segment at the distal end of the insertion part can be controlled by operating the endoscope handle.

[0063] The endoscopes used in this application can be bronchoscopes, pyeloscopes, esophagoscopes, gastroscopes, colonoscopes, otoscopes, rhinoscopes, oral endoscopes, laryngoscopes, colposcopes, laparoscopes, arthroscopes, etc. This application does not impose specific limitations on the types of endoscopes.

[0064] The above embodiments of this application focus on describing the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. For the sake of brevity, they will not be described in detail here.

[0065] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A serpentine bone, characterized in that, The application relates to a snake bone unit (100) comprising a plurality of snake bone units (100) connected end to end, two opposite first connecting parts (110) being arranged between the snake bone unit (100) and the adjacent snake bone unit (100), the two opposite first connecting parts (110) being distributed along the radial direction of the snake bone unit (100), and the snake bone unit (100) and the adjacent snake bone unit (100) being connected through the first connecting part (110). The snake bone unit (100) is provided with a first opening (130) and a second opening (140) at both axial ends thereof, the first connecting part (110) connecting the snake bone unit (100) passes through the second opening (140) of the adjacent snake bone unit (100) and the first opening (130) of the snake bone unit (100) in sequence and is connected with the adjacent snake bone unit (100). The first connecting part (110) comprises a first connecting section (111), a first winding section (112), a second winding section (113) and a second connecting section (114) connected in sequence, the first connecting section (111) is connected with the snake bone unit (100), and the second connecting section (114) is connected with the adjacent snake bone unit (100). The first winding section (112) is matched with the inner wall of the second opening (140) of the adjacent snake bone unit (100), and a first gap (141) is formed between the first winding section (112) and the inner wall of the second opening (140) of the adjacent snake bone unit (100). And / or, the second winding section (113) is matched with the inner wall of the first opening (130) of the snake bone unit (100), and a second gap (131) is formed between the second winding section (113) and the inner wall of the first opening (130) of the snake bone unit (100).

2. The serpentine bone according to claim 1, wherein, The connection between the first winding section (112) and the second winding section (113) is located between the first connecting section (111) and the second connecting section (114), a first avoiding space (142) is formed between the first connecting section (111) and the first winding section (112), and a second avoiding space (132) is formed between the second connecting section (114) and the second winding section (113).

3. The serpentine bone according to claim 2, wherein, The first winding section (112) comprises a first winding section base body (112a) and a first winding section protrusion (112b) protruding radially from the first winding section base body (112a), and the first winding section protrusion (112b) is arranged adjacent to the first connecting section (111). And / or, the second winding section (113) comprises a second winding section base body (113a) and a second winding section protrusion (113b) protruding radially from the second winding section base body (113a), and the second winding section protrusion (113b) is arranged adjacent to the second connecting section (114).

4. The serpentine bone according to claim 3, wherein, On the extension path of the first connecting part (110), the width of the first winding section protrusion (112b) gradually decreases, and the width of the second winding section protrusion (113b) gradually increases.

5. The serpentine bone according to any one of claims 1 to 4, characterized in that, The first winding section (112) and / or the second winding section (113) are in an arc configuration.

6. The serpentine bone according to claim 5, wherein, In the circumferential direction of the serpentine bone unit (100), the first opening (130) at least partially overlaps with the second opening (140).

7. The serpentine bone according to any one of claims 1 to 4, wherein The serpentine bone unit (100) is provided with an accommodation space (150) extending through the serpentine bone unit (100) in the axial direction, and the serpentine bone unit (100) is provided with a partition wall unit (160) extending in the axial direction, the partition wall unit (160) separates the accommodation space (150) into an instrument lumen (151) and a wire harness cavity (152), two adjacent partition wall units (160) are connected by a second connecting portion (120), and the second connecting portion (120) has the same structure as the first connecting portion (110).

8. An insertion portion characterized by, The serpentine bone unit (100) is provided with an accommodation space (150) extending through the serpentine bone unit (100) in the axial direction, and the serpentine bone unit (100) is provided with a partition wall unit (160) extending in the axial direction, the partition wall unit (160) separates the accommodation space (150) into an instrument lumen (151) and a wire harness cavity (152), two adjacent partition wall units (160) are connected by a second connecting portion (120), and the second connecting portion (120) has the same structure as the first connecting portion (110).

9. An endoscope characterized by comprising: The serpentine bone unit (100) is provided with an accommodation space (150) extending through the serpentine bone unit (100) in the axial direction, and the serpentine bone unit (100) is provided with a partition wall unit (160) extending in the axial direction, the partition wall unit (160) separates the accommodation space (150) into an instrument lumen (151) and a wire harness cavity (152), two adjacent partition wall units (160) are connected by a second connecting portion (120), and the second connecting portion (120) has

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