Snake bone structure and endoscope

Abstract

The application discloses a snake bone structure and an endoscope, and relates to the technical field of medical devices. The snake bone structure comprises a limiting piece and a spiral pipe body. The pipe body comprises a plurality of sequentially connected bone segments. Each bone segment surrounds the axis of the pipe body once. A spiral cut is formed between two adjacent bone segments. The inner side walls of the first side and the second side of the bone segment in the first direction are provided with the limiting piece. The first direction is the radial direction of the bone segment. The surface of the bone segment forming the cut is a spiral surface, and at least one end of the extension direction of the limiting piece protrudes from the spiral surface. In the case that the pipe body is bent, the two adjacent bone segments can be limited by the limiting pieces on the same side. The snake bone structure can solve the problem that the inner side of the bending part of the snake bone structure is easily embedded in sequence from the head to the tail.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, and in particular to a snake bone structure and an endoscope. BACKGROUND

[0002] An endoscope is a commonly used medical device, which is an inspection device capable of directly entering a natural duct of a human body to provide sufficient diagnostic information for a doctor to treat a disease. The endoscope includes an insertion portion, which can enter the human body through a body cavity or a surgical incision.

[0003] In the related art, the insertion portion includes a main body portion, a front end assembly, and a snake bone. One end of the extension direction of the snake bone is connected to the distal end of the main body portion. The front end assembly is arranged at the second end of the extension direction of the snake bone. The snake bone includes a plurality of bone segments, and the plurality of bone segments are rotationally connected to each other to adjust the orientation of the front end assembly by relative rotation between two adjacent bone segments, thereby adapting to a curved body cavity or adjusting the visual field of the front end assembly.

[0004] However, in the related art, the inner side of the curved portion of the spiral snake bone is easily arranged in sequence from the head to the tail along the extension direction of the snake bone, thereby causing poor controllability of the bending angle of the snake bone and being not conducive to precisely adjusting the bending angle of the distal end of the insertion portion. SUMMARY

[0005] The present application discloses a snake bone structure and an endoscope to solve the problem that the inner side of the curved portion of the spiral snake bone structure in the related art is easily arranged in sequence from the head to the tail.

[0006] To solve the above problems, the present application adopts the following technical solutions:

[0007] In a first aspect, the present application provides a snake bone structure. The snake bone structure can be used in an endoscope. The snake bone structure includes a limiting piece and a spiral tube. The tube includes a plurality of bone segments connected in sequence. Each bone segment is wrapped around the axis of the tube for one turn. The adjacent two bone segments form a spiral cut. The inner side walls of the first side and the second side of the bone segment in the first direction are provided with the limiting piece. The first direction is the radial direction of the bone segment. The face of the bone segment forming the cut is a spiral face, and at least one end of the extension direction of the limiting piece protrudes from the spiral face. In the case of bending of the tube, the two adjacent bone segments can be stopped by the limiting piece on the same side.

[0008] The technical solutions adopted by the present application can achieve the following beneficial effects:

[0009] In the snake bone structure provided by the application, the limiting members protrude from the spiral surface of the bone segments. In the process of deflection of the two adjacent bone segments, the limiting members on the same side abut and limit each other. In this way, not only can the maximum deflection angle between the two adjacent bone segments be limited, but also the inside of the bending part of the snake bone structure can be prevented from having bone segments embedded in sequence from the head to the tail through the abutment and limitation of the limiting members on the same side. Therefore, in the process of preparing the snake bone structure, the height of the protrusion of the limiting members from the spiral surface can be set according to the need to set the maximum angle of relative deflection of the two adjacent bone segments, thereby being beneficial to improving the controllability of the bending angle of the snake bone structure.

[0010] According to some optional embodiments, the end of the extending direction of the limiting member has a limiting surface. The limiting surface is obliquely arranged. The limiting members on the same side of the two adjacent bone segments abut and limit each other through the limiting surface.

[0011] According to some optional embodiments, the bone segment has a rotating part. The rotating part is located between the two limiting members. The two adjacent bone segments are rotationally connected through the rotating part, and the two adjacent bone segments can be deflected to the first side or the second side of the bone segment around the first axis. The limiting surface is parallel to the first axis.

[0012] According to some optional embodiments, the rotating part protrudes from the spiral surface of the bone segment. The rotating part has an arc surface, and the arc surface abuts against the spiral surface of the adjacent bone segment.

[0013] According to some optional embodiments, the limiting member extends along the axis direction of the bone segment, and the two ends of the extending direction of the limiting member protrude from the spiral surface.

[0014] According to some optional embodiments, the limiting member has a first connecting part and a second connecting part, the first connecting part and the second connecting part are spaced apart along the extending direction of the limiting member, and the first connecting part and the second connecting part are connected to the bone segment, respectively.

[0015] According to some optional embodiments, in the case where the limiting members on the first side of the two adjacent bone segments abut, there is a clearance between the first sides of the two adjacent bone segments.

[0016] According to some optional embodiments, in the case where the limiting members on the second side of the two adjacent bone segments abut, there is a clearance between the spiral surfaces of the second sides of the two adjacent bone segments.

[0017] According to some optional embodiments, the limiting member has a wire hole, the wire hole penetrates through the limiting member along the axis direction of the bone segment, the endoscope includes a traction rope, and the wire hole is used for threading the traction rope.

[0018] In a second aspect, the application also provides an endoscope. The endoscope has the same technical features as the snake bone structure provided by the application and has the same technical effects, which will not be described here.

[0019] According to some optional embodiments, the endoscope further comprises two traction ropes. Both of the two traction ropes are arranged in the tube body. One of the two traction ropes is arranged on the first side of the first direction of the tube body, and the other of the two traction ropes is arranged on the second side of the first direction of the tube body. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and all other drawings obtained by those of ordinary skill in the art without creative effort based on these drawings are within the scope of protection of the present application.

[0021] Figure 1 is a schematic view of a snake bone structure provided by some optional embodiments of the present application;

[0022] Figure 2 is a schematic view of a snake bone structure provided by some optional embodiments of the present application; Figure 1 is a partial enlarged view of A in FIG. 10;

[0023] Figure 3 is a schematic view of the stop of the limiting member on the same side of two adjacent bone segments provided by some optional embodiments of the present application;

[0024] Figure 4 is a cross-sectional view of a snake bone structure provided by some optional embodiments of the present application Figure 1 ;

[0025] Figure 5 is a cross-sectional view of a snake bone structure provided by some optional embodiments of the present application Figure 2 ;

[0026] Figure 6 is a schematic view of a bending part of a snake bone structure provided by some optional embodiments of the present application.

[0027] Explanation of reference signs: 100-limiting member; 110-limiting surface; 101-thread passing hole; 200-tube body; 210-bone segment; 211-spiral surface; 212-rotation part; 201-cutout; 202-avoidance gap; 300- traction rope. DETAILED DESCRIPTION

[0028] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described in detail below. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0029] The terms "first", "second", and the like in the description and in the claims of the present application are used to distinguish similar objects, and are not used to describe a particular sequential or chronological order. It should be understood that the data thus used can be interchanged, where appropriate, so that the embodiments of the present application can be carried out in sequences other than those illustrated or described herein, and the objects distinguished by "first", "second", and the like are generally of a kind and are not limited in number, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in an "or" relationship.

[0030] In the embodiments of the present application, "proximal end" and "distal end" refer to the relative positions of the endoscope and its accessories in the use environment relative to the user, wherein the end closer to the user is designated as the "proximal end", and the end farther from the user is designated as the "distal end".

[0031] The spiral snake bone is bent and deformed under the pulling of the traction rope, thereby driving the insertion part of the endoscope to bend to adapt to different cavities. However, the bending position of the spiral snake bone in the related art is prone to twisting and deforming, thereby causing the inner side of the bending position of the snake bone to be sequentially nested end to end along the extension direction of the snake bone. Moreover, the greater the pulling force of the traction rope, the deeper the adjacent bone segments are nested end to end, thereby causing the size of the deflection angle between the two adjacent bone segments to be uncertain, thereby causing the controllability of the bending angle of the snake bone to be poor, which is not conducive to precisely adjusting the bending angle of the distal end of the insertion part.

[0032] To solve the above technical problems, the embodiments of the present application provide a snake bone structure and an endoscope. The snake bone structure has a plurality of sequentially connected bone segments, and a spiral-shaped cut is formed between two adjacent bone segments, so that the snake bone structure can bend to a first side and / or a second side. The first side and the second side of the bone segment are provided with a limiting piece. The surface of the bone segment forming the cut is a spiral surface. The end of the limiting piece protrudes from the spiral surface. In the case where the snake bone structure bends to the maximum angle on the first side, the limiting pieces located on the first sides of the two adjacent bone segments abut against each other. In the case where the snake bone structure bends to the maximum angle on the second side, the limiting pieces located on the second sides of the two adjacent bone segments abut against each other. In this way, the limiting pieces can limit the maximum bending angle of the snake bone structure, and facilitate the embedding of one of the two adjacent bone segments into the other, so as to avoid the end-to-end nesting of the inner side of the bending position of the snake bone structure.

[0033] The embodiments of the present application will be described in detail below with reference to the accompanying drawings. Figures 1 to 6 The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0034] In a first aspect, the present application provides a snake bone structure. The snake bone structure can be used in an endoscope. Specifically, the snake bone structure can be used in an active bending section of an endoscope insertion part to achieve active bending of the insertion part to adapt to a body cavity or to adjust the direction of the distal end of the insertion part to obtain a different angle of view.

[0035] Referring to Figure 1 , the snake bone structure provided by the present application comprises a limiting member 100 and a spiral tube body 200. The tube body 200 is a basic structural member to provide a mounting base for other components through the tube body 200.

[0036] As shown in Figure 1 , the tube body 200 comprises a plurality of bone segments 210 connected in sequence. Each bone segment 210 is wrapped around the axis of the tube body 200. In some optional embodiments, the axis of the tube body 200 refers to the central axis of the tube body 200 when the tube body 200 is in a straight state. For example, the axis of the tube body 200 can be the axis L1 shown in Figure 1 .

[0037] In some optional embodiments, the plurality of bone segments 210 can be an integral structure. Specifically, the tube body 200 with the plurality of bone segments 210 can be formed by a cutting process during the preparation of the tube body 200.

[0038] Referring to Figure 1 , a spiral cut 201 is formed between two adjacent bone segments 210 to provide a space for deflection of the two adjacent bone segments 210, so that the tube body 200 can be deflected and bent to one side or multiple sides.

[0039] According to some optional embodiments, the first direction of the bone segment 210 has a first side and a second side opposite to each other. The inner wall of the first side and the inner wall of the second side of the bone segment 210 are provided with the limiting member 100. For example, the first direction is the radial direction of the bone segment 210. According to some optional embodiments, the first direction can be the direction of the y-axis shown in Figure 4 .

[0040] Referring to Figure 2 and Figure 3 , in some optional embodiments, the surface of the bone segment 210 forming the cut 201 is a spiral surface 211. For example, the end surface of the bone segment 210 in the second direction forms the cut 201. For example, the second direction can be the direction of the x-axis shown in Figure 4 .

[0041] Referring to Figures 2 to 4 , at least one end of the extension direction of the limiting member 100 protrudes from the spiral surface 211. As Figure 3As shown, in the case of bending of the tube body 200, two adjacent bone segments 210 can be limited by the stoppers 100 on the same side. Specifically, in the case of deflection of the snake structure to the first side to the maximum bending angle, the two adjacent stoppers 100 on the first side of the bone segments 210 are limited. In the case of deflection of the snake structure to the second side to the maximum bending angle, the two adjacent stoppers 100 on the second side of the bone segments 210 are limited.

[0042] In the process of bending of the snake structure, the end surface of one of the two adjacent bone segments 210 in the second direction slides along the end surface of the other in the second direction to the inside of the bone segments 210. In the above embodiment, the end of the stopper 100 protrudes from the spiral surface 211, thereby making the stopper 100 beneficial to stop on the inner wall of the bone segments 210 to avoid the partial embedding of the bone segments 210 into the adjacent bone segments 210. In addition, in the case of deflection of the two adjacent bone segments 210 to the maximum bending angle, the stoppers 100 on the same side of the two adjacent bone segments 210 are limited. Therefore, the deflection angle between the two adjacent bone segments 210 can be prevented from being too large by the two stoppers 100 on the same side to avoid the end-to-end embedding of the two adjacent bone segments 210 due to the excessive distortion between the two adjacent bone segments 210.

[0043] In the snake structure provided by the above embodiment, the two stoppers 100 on the same side of the two adjacent bone segments 210 not only limit the maximum deflection angle between the two bone segments 210 to avoid excessive bending between the two adjacent bone segments 210. The stoppers 100 on the same side support each other, so that the tension of the traction rope 300 acting on the bone segments 210 at the distal end of the snake structure can be transmitted in sequence by the stoppers 100 on the same side, thereby limiting the maximum deflection angle of any two adjacent bone segments 210 and improving the controllability of the deflection angle of different segments of the snake structure.

[0044] According to some optional embodiments, referring to Figure 2 and Figure 5 , the end of the extension direction of the stopper 100 has a limiting surface 110. The limiting surface 110 is inclinedly arranged. In some optional embodiments, as Figure 3 and Figure 6 , the stoppers 100 on the same side of the two adjacent bone segments 210 are limited by the limiting surface 110. For example, in the case of deflection of the two adjacent bone segments 210 to the maximum bending angle, the limiting surfaces 110 of the two adjacent stoppers 100 on the same side are limited.

[0045] In the above embodiments, the stoppers 100 on the same side of the two adjacent bone segments 210 are abutted and fitted by the stop surfaces 110, so that the two stoppers 100 on the same side are in surface-to-surface contact and limited, thereby beneficially avoiding stress concentration of the support portions between the two stoppers 100 and improving the reliability of the abutment and fitting of the two stoppers 100. In addition, the two stoppers 100 are in surface-to-surface abutment and limitation, which is beneficial to prevent relative sliding between the two stoppers 100, and thereby the interaction force between the two stoppers 100 can be used to prevent the two adjacent bone segments 210 from being nested end to end.

[0046] With reference to Figure 5 , according to some optional embodiments, the stoppers 100 extend along the axis of the bone segments 210. In some optional embodiments, along the axial direction of the bone segments 210, the stop surfaces 110 are inclined to the middle part of the extension direction of the stoppers 100, so that the interaction force generated by the two stoppers 100 can prevent one of the two adjacent bone segments 210 from moving radially relative to the other.

[0047] According to some optional embodiments, with reference to Figure 1 , the bone segments 210 have rotating portions 212. The rotating portions 212 are located between the two stoppers 100. The two adjacent bone segments 210 are rotatably connected through the rotating portions 212, and the two adjacent bone segments 210 can be deflected to the first side or the second side of the bone segments 210 around the first axis.

[0048] With reference to Figure 1 and Figure 4 , according to some optional embodiments, the rotating portions 212 protrude from the helical surfaces 211 of the bone segments 210, the rotating portions 212 have arc surfaces, and the arc surfaces abut the helical surfaces 211 of the adjacent bone segments 210. With reference to Figure 1 and Figure 4 , the rotating portion 212 of one of the two adjacent bone segments 210 protrudes from the helical surface 211 of the bone segment 210, and the rotating portion 212 abuts on the helical surface 211 of the other. For example, the rotating portion 212 is a protruding portion provided on the bone segment 210, and the rotating portion 212 has an arc surface or a spherical surface, so that the rotating portion 212 can form a rotating pair with the adjacent bone segment 210, thereby realizing the relative rotation between the two adjacent bone segments 210.

[0049] According to some optional embodiments, the limiting surface 110 of the limiting member 100 is parallel to the first axis. During the deflection and bending of the serpentine structure, the limiting member 100 rotates in the first plane. In this way, the limiting surface 110 is perpendicular to the first plane. Therefore, this embodiment is beneficial to prevent the two adjacent limiting members 100 on the same side from abutting and sliding relative to each other, thereby preventing the two limiting members 100 from being misaligned with each other and improving the reliability of the abutment limiting of the two limiting members 100 on the same side.

[0050] According to some optional embodiments, the limiting member 100 extends along the axis direction of the bone segment 210. The two ends of the extending direction of the limiting member 100 protrude from the helical surface 211 of the bone segment 210, i.e., the two ends of the limiting member 100 penetrate the two helical surfaces 211 opposite to each other in the extending direction of the limiting member 100. In this way, during the deflection and bending of the serpentine structure, the tensile force on the distal bone segment 210 of the serpentine structure can be sequentially transmitted to each bone segment 210 by directly abutting the limiting members 100 on the same side with each other. Therefore, this embodiment is beneficial to reduce the stress on the axis direction of the bone segment 210, thereby preventing the collapse of the serpentine structure in the axis direction and effectively avoiding the end-to-end embedding of two adjacent bone segments 210.

[0051] In some other optional embodiments, two limiting members 100 are arranged on the side of the first direction of each bone segment 210. The two limiting members 100 are arranged in the axis direction of the bone segment 210 and the end of the two limiting members 100 opposite to each other protrudes from the helical surface 211 of the bone segment 210. For example, a first limiting member and a second limiting member are arranged in each bone segment 210. The first limiting member and the second limiting member are arranged in the axis direction of the bone segment 210. The end of the first limiting member away from the second limiting member protrudes from the first helical surface 211 in the axis direction of the bone segment 210. The end of the second limiting member away from the first limiting member protrudes from the second helical surface 211 in the axis direction of the bone segment 210.

[0052] In some optional embodiments, the limiting member 100 has a first connecting portion and a second connecting portion. The first connecting portion and the second connecting portion are arranged in the extending direction of the limiting member 100 and are connected to the bone segment 210, respectively. In some optional embodiments, the side wall of the limiting member 100 abuts against the inner side wall of the bone segment 210. Alternatively, one of the first connecting portion and the second connecting portion is adjacent to the first side of the bone segment 210 in the axis direction, and the other is adjacent to the second side of the bone segment 210 in the axis direction. For example, the first connecting portion and the second connecting portion can be the welding points connecting the limiting member 100 and the bone segment 210.

[0053] In the above embodiment, the two connecting portions between the limiting member 100 and the bone segment 210 are spaced along the axial direction of the bone segment 210, which is beneficial to increase the strength of the bone segment 210 by the limiting member 100. Therefore, the embodiment is beneficial to reduce the distortion of the bone segment 210 in the case of deflection bending of the snake bone structure, and is beneficial to prevent the two adjacent bone segments 210 from being nested end to end, and improve the controllability of the bending angle of the snake bone structure.

[0054] In some optional embodiments, the connecting portion between the limiting member 100 and the bone segment 210 penetrates the bone segment 210 along the axial direction of the bone segment 210, so as to improve the reliability of the assembly of the limiting member 100 and the bone segment 210.

[0055] According to some optional embodiments, the limiting member 100 and the bone segment 210 can be connected by but not limited to a welding process. Of course, in some optional embodiments, the limiting member 100 can also be an integral structure with the bone segment 210.

[0056] According to some optional embodiments, referring to Figure 3 and Figure 6 In the case that the limiting member 100 on the first side of the two adjacent bone segments 210 abuts, there is a clearance 202 between the helical surfaces 211 on the first side of the two adjacent bone segments 210. That is, in the case that the two adjacent bone segments 210 are deflected to the maximum angle on the first side, there is a clearance 202 between the first sides of the two adjacent bone segments 210.

[0057] According to some optional embodiments, in the case that the limiting member 100 on the second side of the two adjacent bone segments 210 abuts, there is a clearance 202 between the helical surfaces 211 on the second side of the two adjacent bone segments 210. That is, in the case that the two adjacent bone segments 210 are deflected to the maximum angle on the second side, there is a clearance 202 between the second sides of the two adjacent bone segments 210.

[0058] For example, in the case that the snake bone structure is used for an endoscope, a protective layer is further provided outside the snake bone structure. In some optional embodiments, the material of the protective layer covering the outside of the snake bone structure is a plastic material. The material of the protective layer outside the snake bone structure can be set according to the needs. The snake bone structure provided in the above embodiment is beneficial to prevent the two adjacent bone segments 210 from damaging the protective layer in the case of bending of the snake bone structure, and can accommodate the protective layer inside the bending part through the clearance 202, so as to avoid the influence of the protective layer on the bending angle of the bone segment structure, and is beneficial to improve the accuracy of the bending angle of the snake bone structure.

[0059] Referring to Figure 4 and Figure 5According to some optional embodiments, the limiting member 100 has a wire hole 101. The wire hole 101 penetrates the limiting member 100 along the axial direction of the bone segment 210. According to some optional embodiments, the limiting member 100 extends along the axial direction of the bone segment 210. The wire hole 101 penetrates the limiting member 100 along the extending direction of the limiting member 100.

[0060] In some optional embodiments, the limiting member 100 is a metal tube. For example, the limiting member 100 can be fixedly connected to the bone segment 210 by welding.

[0061] The endoscope includes a traction rope 300. According to some optional embodiments, in the case that the snake structure is used in the endoscope, the wire hole 101 is used to pass the traction rope 300. For example, the traction rope 300 is used to pull the snake structure to deflect and bend to the first side or the second side. Figure 5 and Figure 6 The traction rope 300 penetrates the limiting member 100 along the wire hole 101, so as to pull the snake structure to deflect and bend to the first side or the second side by the traction rope 300.

[0062] In the above embodiments, the wire hole 101 is arranged in the limiting member 100, so that the limiting members 100 on the same side of the snake structure share one traction rope 300. In this way, the traction rope 300 can guide two adjacent limiting members 100 to stop and limit during the bending of the snake structure, and can also provide resistance to prevent the two adjacent bone segments 210 from being nested.

[0063] On the other hand, the present application provides an endoscope. The endoscope includes the snake structure provided by the above embodiments, and has the same technical effects, which will not be described here.

[0064] In some optional embodiments, the endoscope further includes an insertion part and an operation part. The operation part is a basic structural member, which can provide a grip and operation control for the operator. The proximal end of the insertion part is connected to the operation part. According to some optional embodiments, the snake structure is arranged at the distal end of the insertion part, so as to bend and turn the distal end of the insertion part by the snake structure to adapt to different cavities and obtain different visual angle pictures.

[0065] Referring to Figure 5 In some optional embodiments, the endoscope further includes two traction ropes 300. The two traction ropes 300 are both arranged in the tube body 200, and one traction rope 300 is arranged on the first side of the first direction of the tube body 200, and the other traction rope 300 is arranged on the second side of the first direction of the tube body 200.

[0066] In some optional embodiments, the traction ropes 300 are connected to the bone segments 210 at the distal end of the snake structure and pass through the bone segments 210 sequentially from the distal end to the proximal end of the snake structure. In some optional embodiments, the limiters 100 have wire passing holes 101. The traction ropes 300 pass through the wire passing holes 101 of the limiters 100 on the same side sequentially. In this way, the limiters 100 can also be used to fix the traction ropes 300 on the first side or the second side of the snake structure, thereby helping to ensure that the force arm of the traction ropes 300 pulling the bone segments 210 to deflect is maximized, thereby helping to reduce the resistance of the traction ropes 300 pulling the snake structure to deflect and bend, and reducing the difficulty of deflecting and bending the snake structure.

[0067] For example, in the case where the snake structure needs to deflect and bend to the first side, the traction ropes 300 on the first side can be pulled and the migration ropes on the second side can be released, so that the bone segments 210 in the snake structure deflect and bend to the first side until the limiters 100 on the first side stop limiting. In the case where the snake structure needs to deflect and bend to the second side, the traction ropes 300 on the second side can be pulled and the migration ropes on the first side can be released, so that the bone segments 210 in the snake structure deflect and bend to the second side until the limiters 100 on the second side stop limiting. Therefore, the above-mentioned embodiments can realize the bending of the snake structure to the first side or the second side by two traction ropes 300.

[0068] The endoscope of the embodiments of the present application can be a bronchoscope, a nephroscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a nasoscope, a mouth mirror, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc. The embodiments of the present application do not specifically limit the type of endoscope.

[0069] It should be noted that in this document, the terms "comprising", "including", or any other variant thereof are intended to cover non-exclusive inclusions, so that processes, methods, articles, or devices that include a series of elements not only include those elements, but also include other elements not explicitly listed, or include elements inherent to such processes, methods, articles, or devices. Without more limitations, the element defined by the phrase "including a" does not exclude the presence of other identical elements in the process, method, article, or device that includes the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but can also include performing functions in a substantially simultaneous manner or in reverse order, for example, the described method can be performed in an order different from that described, and various steps can also be added, omitted, or combined. In addition, the features described with reference to certain examples can be combined in other examples.

[0070] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A serpentine bone structure, characterized in that, The snake bone structure is used for an endoscope, and the snake bone structure comprises a limiting piece (100) and a spiral tube body (200), The tube body (200) comprises a plurality of sequentially connected bone segments (210), each of the bone segments (210) is around an axis of the tube body (200) for one turn, and a spiral cut (201) is formed between two adjacent bone segments (210). The inner side walls of the first side and the second side of the bone segment (210) in a first direction are provided with the limiting piece (100), the first direction is a radial direction of the bone segment (210), a spiral surface (211) is formed on the surface of the bone segment (210) forming the cut (201), and at least one end of the extending direction of the limiting piece (100) protrudes from the spiral surface (211). In the case that the tube body (200) is bent, two adjacent bone segments (210) can be limited by the limiting pieces (100) on the same side. In the case that the limiting pieces (100) on the first side of two adjacent bone segments (210) are limited, there is a clearance (202) between the first sides of two adjacent bone segments (210).

2. The serpentine bone structure of claim 1, wherein, The end of the extending direction of the limiting piece (100) is provided with a limiting surface (110), the limiting surface (110) is inclined, and the limiting pieces (100) on the same side of two adjacent bone segments (210) are limited by the limiting surface (110).

3. The serpentine bone structure of claim 2, wherein, The bone segment (210) has a rotating part (212) between two limiting pieces (100), two adjacent bone segments (210) are rotationally connected through the rotating part (212), and two adjacent bone segments (210) can be deflected to the first side or the second side of the bone segment (210) around a first axis. The limiting surface (110) is parallel to the first axis.

4. The serpentine bone structure of claim 3, wherein, The rotating part (212) protrudes from the spiral surface (211) of the bone segment (210), The rotating part (212) has an arc surface, and the arc surface is limited by the spiral surface (211) of the adjacent bone segment (210).

5. The serpentine bone structure of claim 2, wherein, The limiting piece (100) extends along the axis direction of the bone segment (210), and two ends of the extending direction of the limiting piece (100) protrude from the spiral surface (211) of the bone segment (210).

6. The serpentine bone structure of claim 5, wherein, The limiting piece (100) has a first connecting part and a second connecting part, the first connecting part and the second connecting part are distributed in the extending direction of the limiting piece (100), and the first connecting part and the second connecting part are connected with the bone segment (210) respectively.

7. The serpentine bone structure according to any one of claims 1 to 6, wherein, In the case that the limiting pieces (100) on the second side of two adjacent bone segments (210) are limited, there is a clearance (202) between the second sides of two adjacent bone segments (210).

8. The serpentine bone structure according to any one of claims 1 to 6, wherein, The limiting piece (100) has a wire passing hole (101) which penetrates the limiting piece (100) along the axial direction of the bone segment (210), the endoscope comprises a traction rope (300), and the wire passing hole (101) is used for threading the traction rope (300).

9. An endoscope characterized by comprising: The snake bone structure comprises the snake bone structure according to any one of claims 1 to 8.

10. The endoscope of claim 9, wherein, The snake bone structure further comprises two traction ropes (300), both of which are threaded in the tube body (200), and one of the traction ropes (300) is arranged on the first side of the first direction of the tube body (200), and the other traction rope (300) is arranged on the second side of the first direction of the tube body (200).

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