Method for manufacturing a serpentine structure and a jig

Abstract

The application discloses a preparation method and a clamp of a snake bone structure and relates to the technical field of medical devices. The preparation method of the snake bone structure comprises the following steps: preparing a pipe body, the pipe body comprising a plurality of sequentially connected bone segments, two adjacent bone segments being provided with an avoiding gap, and the two adjacent bone segments being capable of being deflected to a first radial side; preparing a plurality of limiting pieces, the limiting pieces being provided with wire passing holes; sequentially sleeving the limiting pieces on a core shaft of the clamp, the limiting pieces being capable of sliding along the core shaft; fixing the limiting pieces to inner walls of the first radial side of the bone segments, end portions of the limiting pieces being protruded from end faces of the bone segments forming the avoiding gaps, in the case that the pipe body is bent, two adjacent bone segments being capable of being stopped by the limiting pieces on the same side; and taking the core shaft out of the wire passing holes. The method is beneficial to reducing the preparation difficulty of the snake bone structure and improving the preparation precision of the snake bone structure by sleeving a plurality of bone segments on the core shaft to provide support for the limiting pieces by the core shaft.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, and in particular to a preparation method of a snake bone structure and a clamp. 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 area of the front end assembly.

[0004] The edge portions of two adjacent bone segment members in the snake bone structure are prone to the problem of end-to-end nesting. In the related art, the preparation of the snake bone structure capable of preventing end-to-end nesting is difficult, thereby resulting in low preparation efficiency and high production cost of the snake bone structure capable of preventing end-to-end nesting. SUMMARY

[0005] The present application discloses a preparation method of a snake bone structure and a clamp to solve the problem of difficulty in preparing a snake bone structure capable of preventing end-to-end nesting in the related art.

[0006] To solve the above problems, the technical scheme adopted by the present application is as follows:

[0007] Firstly, the present application provides a preparation method of a snake bone structure. The preparation method of the snake bone structure includes: preparing a tube body, the tube body including a plurality of sequentially connected bone segment members, the adjacent two bone segment members having an avoiding gap therebetween, and the adjacent two bone segment members being deflectable relative to a first radial side; preparing a plurality of limiting members, the limiting member having a wire passing hole; sequentially sleeving the plurality of limiting members on a core shaft of a clamp, the limiting member being slidable along the core shaft; fixing the limiting member to the inner wall of the first radial side of the bone segment member, the end portion of the limiting member protruding from the end face of the bone segment member forming the avoiding gap, in the case of bending of the tube body, the two adjacent bone segment members being stoppable by the limiting members on the same side; and taking out the core shaft from the wire passing hole.

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

[0009] The preparation method of the snake bone structure provided in the application comprises the following steps: first, a pipe body and a limiting piece are prepared; then, the limiting pieces on the same side of the bone segments are arranged on the core shaft of a clamp, so that the core shaft is used to assist in positioning the plurality of limiting pieces, thereby reducing the difficulty of preparing the snake bone structure, improving the consistency of the installation positions of the limiting pieces on the same side in the snake bone structure, and improving the installation precision and the preparation efficiency of the snake bone structure.

[0010] In a second aspect, the application provides a preparation clamp for a snake bone structure. The preparation clamp for the snake bone structure can be used in the preparation method of the snake bone structure provided in the application. The snake bone structure comprises a pipe body and a limiting piece. The limiting piece is fixed to the inner wall of the first side of the bone segment in the radial direction. The end of the limiting piece protrudes from the end face of the bone segment forming an avoiding gap, and in the case of bending of the pipe body, the two adjacent bone segments can be limited by the limiting pieces on the same side. The limiting piece has a wire passing hole. The preparation clamp for the snake bone structure comprises a core shaft and a plurality of positioning pieces. The positioning piece also has an installation hole. The installation hole penetrates the positioning piece along the extension direction of the positioning piece. The positioning piece and the limiting piece are movably sleeved on the core shaft. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the 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 application, and other drawings can also be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0012] Figure 1 is a flow chart of the preparation method of the snake bone structure provided in some optional embodiments of the application;

[0013] Figure 2 is a schematic view of the clamp inserted into the pipe body provided in some optional embodiments of the application;

[0014] Figure 3 is Figure 2 is an enlarged view of B in FIG. 1;

[0015] Figure 4 is a schematic view of the snake bone structure provided in some optional embodiments of the application;

[0016] Figure 5 is Figure 4 is a method diagram of A in FIG. 2;

[0017] Figure 6 is a schematic view of the abutment of the two adjacent limiting pieces provided in some optional embodiments of the application;

[0018] Figure 7 is a sectional view of the snake bone structure provided in some optional embodiments of the application;

[0019] Figure 8 is a schematic view of the traction rope being mounted to the serpentine structure in some optional embodiments of the present application;

[0020] Figure 9 is a schematic view of the traction rope pulling the serpentine structure to bend in some optional embodiments of the present application;

[0021] Figure 10 is a schematic view of the limiting member being mounted to the clamp in some optional embodiments of the present application;

[0022] Figure 11 is a top view of the mandrel and the mounting seat in some optional embodiments of the present application;

[0023] Figure 12 is a top view of the positioning member being sleeved to the mandrel in some optional embodiments of the present application;

[0024] Figure 13 is a perspective view of the positioning member in some optional embodiments of the present application;

[0025] Figure 14 is a top view of the positioning member in some optional embodiments of the present application.

[0026] Explanation of reference signs:

[0027] 100 - limiting member; 110 - limiting surface; 101 - wire passing hole; 200 - pipe body; 210 - bone segment; 211 - spiral surface; 212 - rotating part; 201 - avoiding notch; 202 - positioning groove; 300 - traction rope; 400 - mandrel; 401 - limiting groove; 500 - positioning member; 510 - positioning surface; 520 - limiting protrusion; 501 - mounting hole; 600 - positioning seat; 610 - positioning protrusion. 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, but 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 work fall within the scope of protection of the present application.

[0029] 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.

[0030] The following is in conjunction with the appendix Figures 1 to 14 The preparation method of the snake bone structure and the fixture provided in this application are described in detail through specific embodiments and application scenarios.

[0031] In a first aspect, this application provides a method for preparing a snake-bone structure. Exemplarily, this method can be used to prepare a snake-bone structure that prevents the head and tail from interlocking.

[0032] Reference Figure 1 The method for preparing this snake bone structure includes the following steps:

[0033] Step S100: Prepare the tube body. The tube body includes multiple sequentially connected bone segments, with clearance gaps between adjacent bone segments, and adjacent bone segments can be deflected radially to a first side.

[0034] The tube body 200 is a basic structural component, providing a mounting base for other components. A clearance notch 201 is formed between two adjacent bone segments 210, allowing the two adjacent bone segments 210 to deflect relative to each other. This allows the snake-bone structure to actively bend or turn by rotating the two adjacent bone segments 210 relative to each other.

[0035] In some optional embodiments, the shape of the bone segment 210 may be, but is not limited to, spiral. For example, in some optional embodiments, the tube body 200 may also be formed by sequentially rotating and connecting the cylindrical bone segments 210 end-to-end. In some optional embodiments, the bone segments 210 may be rotatably adjacent by riveting. In some optional embodiments, the bone segments 210 may also be rotatably connected by snap-fitting.

[0036] In some alternative embodiments, the bone segment 210 is helical in shape. Each bone segment 210 completes one revolution around the axis of the tube body 200. Exemplarily, when the tube body 200 is in a straight line, the axis of the tube body 200 refers to the central axis of the tube body 200. Exemplarily, the axis of the tube body 200 can be... Figure 4The axis L1 is shown in FIG. 1. 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.

[0037] Referring to Figure 5 In some optional embodiments, a helical relief gap 201 is formed between two adjacent bone segments 210, so that the relief gap 201 can provide a relief space for the deflection of the two adjacent bone segments 210, and thus the tube body 200 can be deflected and bent to one or more sides.

[0038] In some optional embodiments, the step S100 of preparing the tube body includes the following steps: step S110, providing a tube body blank. For example, the tube body blank can be, but is not limited to, a metal tube. Step S120, laser cutting the tube body blank to form the tube body.

[0039] Step S300, preparing a plurality of limiters. The limiter has a wire hole. For example, referring to Figures 7 to 9 The limiter 100 is arranged along the extension direction of the bone segment 210, where the extension direction of the bone segment 210 can be Figure 8 the direction shown by the x-axis in FIG. 1. The wire hole 101 penetrates the bone segment 210 along the extension direction of the bone segment 210. For example, referring to Figure 8 and Figure 9 In some optional embodiments, the wire hole 101 is used to pass the traction rope 300, so that the limiter 100 can not only limit the maximum bending angle of the snake bone structure, but also be used to limit the position of the traction rope 300, so as to pull the snake bone structure to bend by the traction rope 300.

[0040] Step S500, sequentially sleeving the plurality of limiters on the core shaft of the clamp, and the limiter can slide along the core shaft.

[0041] For example, the core shaft 400 can be, but is not limited to, a metal shaft. For example, referring to Figure 2 and Figure 10 The plurality of limiters 100 are sequentially sleeved on the core shaft 400 of the clamp, and thus the core shaft 400 can limit each limiter 100, which is beneficial to improve the coaxiality between the limiters 100 on the same side of the tube body 200, and thus is beneficial to reduce the difficulty of assembling the limiters 100 and the tube body 200, and improve the preparation efficiency and preparation precision of the snake bone structure. The limiter 100 and the core shaft 400 are in sliding fit, so that the limiter 100 can slide along the core shaft 400, so as to adjust the relative position between the limiter 100 and the corresponding bone segment 210.

[0042] Step S700, fixing the limiting member to the inner wall of the first side of the bone segment in the radial direction. The end of the limiting member protrudes from the end face of the bone segment forming the avoiding gap. In the case of bending the tube body, two adjacent bone segments can be limited by the limiting member on the same side.

[0043] For example, step S700, fixing the limiting member 100 to the inner wall of the first side of the bone segment 210 in the radial direction, includes: step S710, adjusting the relative position between the limiting member and the corresponding bone segment, so that the end of the limiting member protrudes from the end face of the bone segment forming the avoiding gap 201. Step S730, fixing the limiting member and the bone segment.

[0044] In some optional embodiments, the height of the end of the limiting member 100 protruding from the end face of the bone segment 210 forming the avoiding gap 201 can be adjusted according to the maximum bending angle of the snake bone structure.

[0045] Step S900, taking out the mandrel from the wire hole.

[0046] For example, in the case of welding the limiting member 100 and the bone segment 210, the bone segment 210 can be taken out from the wire hole 101 of the corresponding limiting member 100. In some optional embodiments, after the limiting members 100 on the same side are all welded and fixed to the bone segments 210, the mandrel 400 can be taken out from the plurality of bone segments 210.

[0047] The snake bone structure prepared according to the preparation method of the snake bone structure described above. As shown in Figure 4 and Figure 5 In the case of forming a spiral avoiding gap 201 between two adjacent bone segments 210, the end face of the bone segment 210 forming the avoiding gap 201 is a spiral surface 211.

[0048] Referring to Figures 4 to 6 , at least one end of the extending direction of the limiting member 100 protrudes from the spiral surface 211. As shown in Figure 3 , in the case of bending the tube body 200, two adjacent bone segments 210 can be limited by the limiting member 100 on the same side. For example, the end of the extending direction of the limiting member 100 is provided with a limiting surface 110. Referring to Figure 5 and Figure 6 In some optional embodiments, two adjacent limiting members 100 on the same side are limited by the limiting surface 110. Specifically, in the case of deflecting the snake bone structure to the first side to the maximum bending angle, the two adjacent limiting members 100 on the first side of the bone segment 210 are limited. In the case of deflecting the snake bone structure to the second side to the maximum bending angle, the two adjacent limiting members 100 on the second side of the bone segment 210 are limited.

[0049] In the bending process of the serpentine structure, the end surface of one of the two adjacent bone segments 210 slides along the end surface of the other bone segment 210 to the inside of the bone segment 210. In the above embodiment, the end of the limiting member 100 protrudes from the helical surface 211, which is beneficial to the abutting of the limiting member 100 against the inner wall of the bone segment 210 to prevent the partial embedding of the bone segment 210 into the adjacent bone segment 210. In addition, when the two adjacent bone segments 210 are deflected to the maximum bending angle, the limiting members 100 on the same side of the two adjacent bone segments 210 abut against each other. Therefore, the deflection angle between the two adjacent bone segments 210 can be prevented from being too large by the two limiting members 100 on the same side to prevent the end-to-end embedding of the two adjacent bone segments 210 due to the excessive distortion between the two adjacent bone segments 210.

[0050] In the case of using the serpentine structure prepared by the method provided in the above embodiment in an endoscope, the pulling rope 300 in the endoscope can be arranged through the wire hole 101 of the limiting member 100. Specifically, the limiting members 100 on the same side of the serpentine structure share one pulling rope 300. In this way, the pulling rope 300 can guide the abutment of the two adjacent limiting members 100 during the bending of the serpentine structure and provide resistance to the deflection of the two adjacent bone segments 210. In addition, the force of the pulling rope 300 acting on the serpentine structure can form a pressing force between the two limiting members 100, which improves the reliability of the abutment of the two limiting members 100 and is beneficial to preventing the end-to-end embedding of the two adjacent bone segments 210.

[0051] The method for preparing the serpentine structure provided in the above embodiment can realize the coaxial arrangement of the multiple limiting members 100 by sleeving the same mandrel 400, which is beneficial to reducing the alignment difficulty between different limiting members 100 and improving the accuracy of the coaxial arrangement of the multiple limiting members 100. In addition, during the assembly of the limiting member 100 and the bone segment 210, the multiple limiting members 100 can be aligned with the pipe body 200 by adjusting the position of the mandrel 400, which is beneficial to reducing the alignment difficulty between the limiting member 100 and the bone segment 210. Therefore, the method is beneficial to reducing the preparation difficulty of the serpentine structure that can prevent end-to-end embedding. In the serpentine structure prepared by the method, the two adjacent limiting members 100 on the same side abut against each other, which is beneficial to preventing the end-to-end embedding of the two adjacent bone segments 210.

[0052] According to some optional embodiments, as shown in Figure 10 The clamp further includes multiple positioning members 500. The positioning member 500 also has a mounting hole 501. The mounting hole 501 penetrates the positioning member 500 along the extension direction of the positioning member 500.

[0053] Step S500, sequentially sleeving the plurality of limit members on the mandrel of the clamp, including the following steps:

[0054] Step S510, sequentially and spacedly sleeving the plurality of limit members and the plurality of positioning members on the mandrel. The positioning member is slidable along the mandrel, and there is one positioning member between two adjacent limit members.

[0055] For example, the positioning member 500 is in sliding fit with the mandrel 400, so that the positioning member 500 is slidable along the axial direction of the mandrel 400.

[0056] In the above embodiment, the spacing between two adjacent limit members 100 on the mandrel 400 can be defined by the positioning member 500. Therefore, during the preparation of the snake bone structure, the size of the positioning member 500 in the axial direction of the mandrel 400 can be set as needed to quickly determine the spacing between two adjacent limit members 100, thereby facilitating the reduction of the difficulty of preparing the snake bone structure and improving the preparation accuracy of the snake bone structure.

[0057] In some optional embodiments, the limit member 100 has a limit surface 110 at both ends of the extension direction of the limit member 100. The limit surface 110 is inclined to the middle part of the extension direction of the limit member 100 in the direction from the first side of the limit member 100 to the second side of the limit member 100. Wherein, the first side of the limit member 100 and the second side of the limit member 100 are two sides of the limit member 100 in the radial direction.

[0058] In some optional embodiments, the limit surface 110 is inclined to stop the two limit members 100 on the same side from abutting by surface-to-surface contact. Referring to Figure 4 The bone segment 210 has a rotating part 212. The rotating part 212 is located between two limit members 100. Two adjacent bone segments 210 are in rotating fit through the rotating part 212, and the two adjacent bone segments 210 can be deflected to the first side or the second side of the bone segment 210 around the first axis. For example, the rotating part 212 can be formed by cutting a metal pipe.

[0059] According to some optional embodiments, the limit surface 110 of the limit member 100 in the extension direction is parallel to the first axis. During the deflection and bending of the snake bone structure, the limit member 100 rotates in the first plane. In this way, the limit surface 110 is perpendicular to the first plane. Therefore, this embodiment is beneficial to prevent the two adjacent limit members 100 on the same side from abutting and then relatively sliding, thereby preventing the two limit members 100 from being misaligned with each other and improving the reliability of the abutting and limiting of the two limit members 100 on the same side.

[0060] Step S700, fixing the limit member to the inner wall of the first side of the bone segment in the radial direction, including the following steps:

[0061] Step S730, insert the core shaft with the installed limit piece into the pipe body, until each bone segment corresponds to one limit piece on the core shaft, and the end of the limit piece protrudes from the end face of the corresponding bone segment with the formed avoiding gap.

[0062] For example, in the case where the positioning piece 500 is arranged between two adjacent limit pieces 100, the adjustment of the positions of the limit pieces 100 can be achieved by adjusting the spacing of one of the limit pieces 100 in the axial direction of the corresponding bone segment 210, thereby facilitating the reduction of the difficulty of the alignment of the limit pieces 100 with the bone segments 210 and ensuring that the height of the limit pieces 100 protruding from the end face of the bone segment 210 with the formed avoiding gap 201 reaches the preset height.

[0063] In some optional embodiments, the length of the limit piece 100 and one adjacent positioning piece 500 in the axial direction of the bone segment 210 is equal to the length of one bone segment 210 in the axial direction thereof, thereby facilitating the equalization of the maximum angle of relative deflection of any two adjacent bone segments 210.

[0064] Step S750, abut the outer wall of the second side of the limit piece 100 against the inner wall of the first side of the pipe body 200, so as to fix the limit piece 100 on the corresponding bone segment 210.

[0065] Step S770, weld and fix the limit piece 100 and the bone segment 210.

[0066] For example, the limit piece 100 and the bone segment 210 can be welded in many ways, such as gas flame welding, electric arc welding, laser welding, electron beam welding, friction welding, ultrasonic welding, etc. Therefore, the specific type of welding of the limit piece 100 and the bone segment 210 is not limited in the embodiments.

[0067] In some optional embodiments, as shown in Figure 4 and Figure 5 The two ends of the extension direction of the positioning piece 500 have positioning faces 510. The first side of the positioning piece 500 is directed to the second side of the positioning piece 500. The positioning faces 510 are inclined to the middle part of the extension direction of the positioning piece 500. The first side of the positioning piece 500 and the second side of the positioning piece 500 are two opposite sides in the radial direction of the positioning piece 500. For example, the inclination angle of the positioning face 510 relative to the extension direction of the positioning piece 500 is equal to the inclination angle of the limit face 110 relative to the extension direction of the limit piece 100.

[0068] Step S510 is performed after the plurality of limit pieces and the plurality of positioning pieces are sequentially and spacedly sleeved on the core shaft. Step S500, sequentially sleeving the plurality of limit pieces 100 on the core shaft 400 of the clamp, further includes the following steps:

[0069] Step S530, adjust the limiting member 100 to the limiting surface 110 and the positioning surface 510.

[0070] In the above embodiment, by adjusting the limiting member 100 to make the limiting surface 110 and the positioning surface 510 fit, and then the outer wall of the second side of the plurality of limiting members 100 is located on the same side of the mandrel 400, thereby beneficially improving the alignment accuracy between the two adjacent limiting members 100 on the same side. And in the process of assembling the limiting member 100 and the pipe body 200, the alignment of the limiting member 100 and the corresponding bone segment 210 on the same side can be realized by aligning a certain limiting member 100 and the corresponding bone segment 210, thereby beneficially reducing the alignment difficulty of the limiting member 100 and the bone segment 210.

[0071] In some optional embodiments, the limiting member 100 adjacent to the first end of the extension direction of the mandrel 400 is the first limiting member. The limiting member 100 adjacent to the second end of the extension direction of the mandrel 400 is the second limiting member. Step S750, the outer wall of the second side of the limiting member 100 abuts against the inner wall of the first side of the pipe body 200, comprising:

[0072] Step S751, one end of the first limiting member adjacent to the first end of the extension direction of the mandrel 400 is aligned with the inner wall of the first side of the corresponding bone segment 210.

[0073] Step S751, one end of the second limiting member adjacent to the second end of the extension direction of the mandrel 400 is aligned with the inner wall of the first side of the corresponding bone segment 210.

[0074] For example, one end of the first limiting member adjacent to the first end of the extension direction of the mandrel 400 is the first end of the first limiting member. One end of the second limiting member adjacent to the second end of the extension direction of the mandrel 400 is the first end of the second limiting member. In the above embodiment, after the limiting member 100 on the mandrel 400 is positioned by the positioning member 500, it can be ensured that the second side of the limiting member 100 on the same mandrel 400 is located on the same side of the mandrel 400. First, the second side of the first end of the first limiting member is aligned with the inner wall of the first side of the corresponding bone segment 210. Then, the second side of the first end of the second limiting member is aligned with the inner wall of the first side of the corresponding bone segment 210. This is beneficial to increase the distance between the two alignment reference points, thereby beneficially improving the alignment accuracy between the limiting member 100 and the pipe body 200.

[0075] In some alternative embodiments, the two adjacent bone segments 210 can be deflected towards a second side which is opposite to the first side. The clamp comprises a positioning seat 600 and two mandrels 400. The two mandrels 400 are spaced apart on the positioning seat 600. For example, the two mandrels 400 are parallel and spaced apart. In some alternative embodiments, the distance between the central axes of the two mandrels 400 is a first distance. The distance between the central axes of the limiters on the first side and the limiters on the second side of the snake bone structure is a second distance, and the first distance is equal to the second distance.

[0076] In step S500, the plurality of limiters and the plurality of positioners are sequentially and spaced apart on the mandrel, comprising:

[0077] In step S550, the plurality of limiters are assembled on the two mandrels. There is one positioner between two adjacent limiters on the same mandrel. At least two limiters are assembled on each mandrel, and the second side of the limiters on one mandrel is opposite to the second side of the limiters on the other mandrel.

[0078] In the above embodiments, the positioners 500 are assembled on the two mandrels 400, and the second side of the limiters 100 on one mandrel 400 is opposite to the second side of the limiters 100 on the other mandrel 400. In this way, not only the number of times of aligning the limiters 100 with the bone segments 210 can be reduced, but also the assembly accuracy of the relative positions of the limiters 100 on the first side and the second side of the bone segments 210 can be ensured.

[0079] According to some alternative embodiments, the first end of the extension direction of the tube body 200 has a positioning groove 202. The clamp is provided with a positioning protrusion 610 which is positioned and matched with the positioning groove 202. When the positioning protrusion 610 is embedded in the positioning groove 202, each bone segment 210 corresponds to one limiter 100 on the mandrel 400. The end of the limiter 100 protrudes from the end face of the corresponding bone segment 210 which forms the avoiding notch 201, and the outer wall of the second side of the limiter 100 on one mandrel 400 abuts against the inner wall of the first side of the tube body 200.

[0080] In step S750, the outer wall of the second side of the limiter abuts against the inner wall of the first side of the tube body, comprising:

[0081] In step S751, the relative positions of the clamp and the tube body 200 are adjusted so that at least part of the positioning protrusion 610 is embedded in the positioning groove 202.

[0082] In the above embodiments, by embedding the positioning protrusion 610 in the positioning groove 202, the difficulty of aligning the limiters 100 with the first side or the second side of the corresponding bone segments 210 can be reduced, and the assembly accuracy of the limiters 100 and the bone segments 210 can be improved.

[0083] In some optional embodiments, the positioning groove 202 can be a V-shaped groove. The positioning protrusion 610 is a wedge-shaped structure that is adapted to the positioning groove 202. In this way, it is beneficial to reduce the difficulty of embedding the positioning protrusion 610 into the positioning groove 202, and the embedding depth can be adjusted so that the side wall of the positioning protrusion 610 fits the inner wall of the positioning groove 202, thereby improving the positioning accuracy of the positioning protrusion 610 on the pipe body 200.

[0084] In another aspect, the present application also provides a preparation jig of a snake bone structure. The snake bone structure can be used in the preparation method of the snake bone structure provided by the present application.

[0085] In some optional embodiments, the snake bone structure includes the pipe body 200 and the limiting piece 100. The limiting piece 100 is fixed to the inner wall of the first side of the bone segment 210 in the radial direction. The end of the limiting piece 100 protrudes from the end face of the bone segment 210 forming the avoiding gap 201. In the case of bending the pipe body 200, two adjacent bone segments 210 can be limited by the limiting piece 100 on the same side, and the limiting piece 100 has a wire passing hole 101.

[0086] Referring to Figure 2 , Figure 3 and Figure 10 , the preparation jig of the snake bone structure includes the mandrel 400 and a plurality of positioning pieces 500. The positioning piece 500 also has a mounting hole 501. The mounting hole 501 penetrates the positioning piece 500 along the extension direction of the positioning piece 500. The positioning piece 500 and the limiting piece 100 are movably sleeved on the mandrel 400.

[0087] The jig provided by the above embodiments can provide support for the limiting piece 100 by using the mandrel 400, and can define the coaxial arrangement of a plurality of limiting pieces 100, thereby reducing the difficulty of assembling the limiting piece 100 with the corresponding bone segment 210, improving the coaxiality of the limiting pieces 100 on the same side of the pipe body 200, and thereby improving the preparation accuracy of the snake bone structure.

[0088] Referring to Figure 5 and Figure 6 , the limiting piece 100 has a limiting face 110 at both ends of the extension direction of the limiting piece 100. In the direction from the first side of the limiting piece 100 to the second side of the limiting piece 100. The limiting face 110 is inclined to the middle part of the extension direction of the limiting piece 100. Among them, the first side of the limiting piece 100 and the second side of the limiting piece 100 are two sides of the limiting piece 100 in the radial direction.

[0089] Referring to Figure 10 and Figure 13The two ends of the extension direction of the positioning member 500 have positioning faces 510. The first side of the positioning member 500 is located along the second side of the positioning member 500. The positioning faces 510 are inclined to the middle part of the extension direction of the positioning member 500. The first side of the positioning member 500 and the second side of the positioning member 500 are opposite sides in the radial direction of the positioning member 500.

[0090] In the case where the positioning member 500 and the limiting member 100 are installed on the mandrel 400, the inclination angle of the positioning face 510 relative to the extension direction of the mandrel 400 is equal to the inclination angle of the limiting face 110 relative to the extension direction of the mandrel 400.

[0091] In the above embodiment, the two ends of the positioning member 500 are respectively provided with the positioning faces 510, and the second side of the limiting member 100 on the same mandrel 400 can be located on the same side of the mandrel 400 by abutting and limiting the positioning face 510 and the limiting face 110 of the adjacent limiting member 100.

[0092] Referring to Figures 11 to 14 In some optional embodiments, referring to Figure 2 and Figure 10 The positioning member 500 includes a positioning seat 600 and two mandrels 400. The two mandrels 400 are spaced apart on the positioning seat 600. The mandrel 400 has a limiting groove 401. The limiting groove 401 extends along the axis direction of the mandrel 400 and penetrates through the end face of the end of the mandrel 400 away from the positioning seat 600. Among the two mandrels 400, the limiting groove 401 of one mandrel faces a first direction, and the limiting groove 401 of the other mandrel faces a second direction. The first direction is opposite to the second direction. The inner wall of the positioning member 500 has a limiting protrusion 520. The limiting protrusion 520 is recessed in the limiting groove 401 and is in sliding fit with the limiting groove 401.

[0093] For example, in the case where the positioning member 500 is assembled to the mandrel 400, the positioning member 500 can be fitted with the limiting protrusion 520 and the limiting groove 401, and the second side of the positioning member 500 on one mandrel 400 is located on the side of the mandrel 400 away from the other mandrel 400. In this way, in the case where the limiting member 100 is assembled to the clamp, it is only necessary to ensure that the limiting face 110 on the limiting member 100 abuts the positioning face 510 of the adjacent positioning member 500 to limit the limiting member 100 along the peripheral direction of the mandrel 400, thereby facilitating the assembly of the limiting member 100 of the snake structure and the pipe body 200.

[0094] In some optional embodiments, the manufacturing jig of the snake bone structure comprises two positioning seats 600. The two positioning seats 600 are respectively arranged at two ends of the extending direction of the mandrels 400. For example, at least one of the two positioning seats 600 is detachably connected with the mandrel 400. In preferred embodiments, one of the two positioning seats 600 is fixedly connected with the mandrel 400, and the other is detachably connected with the mandrel 400. In this way, the two positioning seats 600 can respectively provide support for the two ends of the extending direction of the mandrel 400, thereby benefiting the reliability of the mandrel 400 to avoid deformation of the mandrel 400 to cause the partial limiters 100 to separate from the inner wall of the corresponding bone segments 210.

[0095] In some optional embodiments, the first end of the extending direction of the tube body 200 has a positioning groove 202, and the positioning seat 600 is provided with a positioning protrusion 610 which is positioned and matched with the positioning groove 202. In the case that the positioning protrusion 610 is embedded in the positioning groove 202, each bone segment 210 corresponds to one limiter 100 on the mandrel 400, the end of the limiter 100 protrudes from the end face of the corresponding bone segment 210 which forms the avoiding gap 201, and the outer wall of the second side of the limiter 100 on one mandrel 400 abuts against the inner wall of the first side of the tube body 200.

[0096] In the above embodiments, the positioning protrusion 610 and the positioning groove 202 on the tube body 200 can limit the tube body 200 in the circumferential direction to ensure that the outer wall of the second side of the limiter 100 on one mandrel 400 abuts against the inner wall of the first side of the tube body 200, and the outer wall of the second side of the limiter 100 on the other mandrel 400 abuts against the inner wall of the second side of the tube body 200. In addition, the positioning protrusion 610 and the positioning groove 202 can also abut and limit in the axial direction of the tube body 200 to ensure that the height of the end of the limiter 100 protruding from the end face of the corresponding bone segment 210 which forms the avoiding gap 201 reaches a predetermined height, thereby benefiting the assembly difficulty of the limiter 100 and the tube body 200, and improving the assembly precision of the limiter 100 and the tube body 200.

[0097] It should be noted that, in the present document, the terms "comprising", "comprises" or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element. Also, it is to be noted that the scope of the methods and apparatus of this application are not limited by the order of the steps or the sequence for performing the steps, as some steps can occur in different order or concurrently, and some steps can be skipped or added, such as described in alternative examples. Also, features described in relation to certain examples can be combined in other examples.

[0098] The above description is only specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered by the protection scope of the present application.

Claims

1. A method of making a serpentine structure, characterized by, The application relates to a pipe body manufacturing method. Preparation of a pipe body, the pipe body comprising a plurality of sequentially connected bone segments, two adjacent bone segments having an avoiding gap therebetween, and two adjacent bone segments being deflectable relative to a first radial side; Preparation of a plurality of limiting members, the limiting members having wire passing holes; Sequentially sleeving the limiting members on a mandrel of a jig, the limiting members being slidable along the mandrel; Fixing the limiting members to inner walls of the first radial side of the bone segments, end portions of the limiting members protruding from end faces of the bone segments forming the avoiding gaps, two adjacent bone segments being stoppable by the limiting members on the same side in the case of bending of the pipe body; Taking the mandrel out of the wire passing holes; The jig further comprises a plurality of positioning members, the positioning members also having mounting holes penetrating the positioning members along extension directions of the positioning members; Sequentially sleeving the limiting members on the mandrel of the jig, comprising: Sequentially and interval sleeving the limiting members and the positioning members on the mandrel, the positioning members being slidable along the mandrel, and one positioning member being between two adjacent limiting members.

2. The method of claim 1, wherein the serpentine bone structure is prepared by the steps of: Two ends of the extension direction of the limiting member have limiting faces, the limiting faces being inclined to the middle part of the extension direction of the limiting member in the direction from the first side of the limiting member to the second side of the limiting member, the first side of the limiting member and the second side of the limiting member being two diametrically opposite sides of the limiting member; Fixing the limiting members to the inner walls of the first radial side of the bone segments, comprising: Inserting the mandrel with the limiting members into the pipe body, each bone segment corresponding to one limiting member on the mandrel, and end portions of the limiting members protruding from end faces of the corresponding bone segments forming the avoiding gaps; Stoppably abutting the outer walls of the second side of the limiting members to the inner walls of the first side of the pipe body; Welding the limiting members and the bone segments.

3. The method of claim 2, wherein the serpentine bone structure is prepared by the steps of: Two ends of the extension direction of the positioning member have positioning faces, the positioning faces being inclined to the middle part of the extension direction of the positioning member in the direction from the first side of the positioning member to the second side of the positioning member, the first side of the positioning member and the second side of the positioning member being two diametrically opposite sides of the positioning member; After sequentially and interval sleeving the limiting members and the positioning members on the mandrel, sequentially sleeving the limiting members on the mandrel of the jig further comprises: Adjusting the limiting members to be in close contact with the limiting faces and the positioning faces.

4. The method of claim 3, wherein the serpentine bone structure is prepared by the steps of: Two adjacent bone segments are deflectable relative to a second radial side, the second side being opposite to the first side; the jig comprises a positioning seat and two mandrels, the two mandrels being interval arranged on the positioning seat; Sequentially and interval sleeving the limiting members and the positioning members on the mandrel, comprising: A plurality of the limiting members are assembled to two of the mandrels, at least two of the limiting members are assembled to each of the mandrels, two adjacent limiting members on the same mandrel are provided with a positioning member, and the second side of the limiting member on one of the mandrels is opposite to the second side of the limiting member on the other mandrel.

5. The method of claim 2 to 4, wherein The first end of the extension direction of the pipe body is provided with a positioning groove, the clamp is provided with a positioning protrusion matched with the positioning groove, each of the bone segments corresponds to one of the limiting members on the mandrel when the positioning protrusion is embedded in the positioning groove, the end of the limiting member protrudes from the end face of the corresponding bone segment forming the avoiding notch, and the outer wall of the second side of the limiting member on one of the mandrels abuts against the inner wall of the first side of the pipe body. The outer wall of the second side of the limiting member abuts against the inner wall of the first side of the pipe body, comprising: Adjusting the relative position of the clamp and the pipe body so that at least part of the positioning protrusion is embedded in the positioning groove.

6. A jig for manufacturing a serpentine structure, characterized by comprising: The preparation clamp of the snake bone structure can be used in the preparation method of the snake bone structure according to any one of claims 1 to 5; the snake bone structure comprises a pipe body and a limiting member, the limiting member is fixed to the inner wall of the first side of the bone segment in the radial direction, the end of the limiting member protrudes from the end face of the bone segment forming the avoiding notch, and in the case of bending of the pipe body, two adjacent bone segments can be limited by the limiting member on the same side, and the limiting member has a wire passing hole; The preparation clamp of the snake bone structure comprises a mandrel and a plurality of positioning members, the positioning member further has a mounting hole, the mounting hole penetrates the positioning member along the extension direction of the positioning member, and the positioning member and the limiting member are movably sleeved on the mandrel.

7. The jig for manufacturing a serpentine bone structure according to claim 6, wherein The two ends of the extension direction of the limiting member have limiting surfaces, and the limiting surfaces are inclined to the middle part of the extension direction of the limiting member in the direction from the first side of the limiting member to the second side of the limiting member, wherein the first side of the limiting member and the second side of the limiting member are two sides of the limiting member in the radial direction. The two ends of the extension direction of the positioning member have positioning surfaces, and the positioning surfaces are inclined to the middle part of the extension direction of the positioning member in the direction from the first side of the positioning member to the second side of the positioning member, wherein the first side of the positioning member and the second side of the positioning member are two sides of the positioning member in the radial direction. In the case that the positioning member and the limiting member are installed on the mandrel, the inclination angle of the positioning surface relative to the extension direction of the mandrel is equal to the inclination angle of the limiting surface relative to the extension direction of the mandrel.

8. The jig for manufacturing a serpentine bone structure according to claim 7, wherein The positioning member comprises a positioning seat and two mandrels, and the two mandrels are spaced apart on the positioning seat, The core shaft has a limiting groove extending along the axial direction of the core shaft and penetrating through the end face of the end of the core shaft away from the positioning seat; the limiting groove of one of the two core shafts faces a first direction, and the limiting groove of the other core shaft faces a second direction, the first direction being opposite to the second direction; the inner wall of the positioning member has a limiting protrusion which is recessed in the limiting groove and is in sliding fit with the limiting groove.

9. The jig for manufacturing a serpentine bone structure according to claim 8, wherein The first end of the extension direction of the pipe body has a positioning groove, the positioning seat is provided with a positioning protrusion in positioning fit with the positioning groove, in the case that the positioning protrusion is embedded in the positioning groove, each of the bone segments corresponds to one of the limiting members on the core shaft, the end of the limiting member protrudes from the end face of the corresponding bone segment forming the avoiding notch, and the outer wall of the second side of the limiting member on one of the core shafts abuts against the inner wall of the first side of the pipe body.

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