Disposable flexible ureteroscope snake bone

Abstract

The utility model discloses a disposable flexible ureteroscope snake bone and coarse adjustment section which comprises a plurality of coarse adjustment snake bone joints, the coarse adjustment snake bone joints are sequentially hinged with one another, and one end of the coarse adjustment section is a snake bone tail end. One end of the fine adjustment section is a snake bone end, the snake bone end is connected with an endoscope imaging component, the other end of the fine adjustment section is connected with the other end of the coarse adjustment section, the fine adjustment section comprises a plurality of fine adjustment snake bone joints, the fine adjustment snake bone joints are sequentially hinged to one another, and the length of each fine adjustment snake bone joint is smaller than that of each coarse adjustment snake bone joint; the bending radian of the fine adjustment section is larger than that of the coarse adjustment section. The flexible snake bone has the advantages that the flexibility of the snake bone can be ensured, the lateral bending strength is good, the axial rotation error is small, the processing is convenient, the cost is low, the snake bone can be effectively prevented from falling off and being fractured due to multiple times of bending or overlarge tensile force on the snake bone, and the safety risk in an operation is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of medical devices, and particularly relates to a disposable flexible ureteroscope snake bone. Background Art

[0002] With the continuous development of medical technology, endoscope technology has been widely used in clinical examinations and surgical treatments. Snake bones have been widely used in the field of medical endoscopes. The flexible endoscope realizes its free rotation in the human body through the swing of the snake bone. Through the relative rotation of the rotating shafts between the snake bones, the endoscope can be flexibly bent in the human body. At present, the processing methods of existing snake bones are mainly divided into two forms: laser cutting and riveting. The former is convenient for processing, but the overall strength of the snake bone is not high, and the risk of snake bone shedding and fracture during surgery is relatively large, and the axial rotation error is large. Although the latter has better strength, greater flexibility, and less axial error than the former, it has the problems of complex processing technology and high price. Summary of the Utility Model

[0003] The technical purpose of the utility model is to provide a disposable flexible ureteroscope snake bone to solve the problems of high cost and low overall strength of the snake bone.

[0004] To solve the above problems, the technical solution of the utility model is as follows:

[0005] A disposable flexible ureteroscope snake bone, comprising:

[0006] A coarse adjustment section, including a plurality of coarse adjustment snake bone joints, which are sequentially hinged to each other. One end of the coarse adjustment section is the tail end of the snake bone;

[0007] A fine adjustment section, one end of the fine adjustment section is the head end of the snake bone, the head end of the snake bone is connected to the endoscope imaging component, the other end of the fine adjustment section is connected to the other end of the coarse adjustment section. The fine adjustment section includes a plurality of fine adjustment snake bone joints, which are sequentially hinged to each other. The length of each fine adjustment snake bone joint is less than the length of the coarse adjustment snake bone joint, and the bending radian of the fine adjustment section is greater than the bending radian of the coarse adjustment section.

[0008] Further preferably, an intermediate section is also provided between the coarse adjustment section and the fine adjustment section. The intermediate section includes a plurality of intermediate snake bone joints, which are sequentially hinged to each other. The intermediate snake bone joints at both ends of the intermediate section are respectively hinged to the adjacent coarse adjustment snake bone joints and fine adjustment snake bone joints;

[0009] The length of the intermediate snake bone joint is between the length of the fine adjustment snake bone joint and the length of the coarse adjustment snake bone joint, and the bending radian of the intermediate snake bone joint is between the bending radian of the fine adjustment snake bone joint and the bending radian of the coarse adjustment snake bone joint.

[0010] Among them, rotating shaft components and rotating port components are provided at both axial ends of each snake bone joint, and the rotating shaft components and rotating port components in adjacent snake bone joints are hinged end to end.

[0011] Specifically, the rotating shaft component includes: a first arc-shaped member and a first circular member. The first arc-shaped member is an extension of one end side wall of the snake bone joint along its axial direction. Starting from the outer arc surface of the first arc-shaped member, the arc length gradually decreases along its radial direction. The first circular member is connected to the inner arc surface of the first arc-shaped member.

[0012] The rotating port component includes: a second arc-shaped member. The second arc-shaped member is an extension of the other end side wall of the snake bone joint along its axial direction. The space enclosed by the second arc-shaped member forms a first circular groove and a first arc-shaped groove. The first circular groove is matched with the first circular member, and the first arc-shaped groove is matched with the first arc-shaped member.

[0013] Specifically, the rotating shaft component includes: a third arc-shaped member, a fourth arc-shaped member, a second circular member, a first raised block and a second raised block. The third arc-shaped member is an extension of one end side wall of the snake bone joint along its axial direction. At both ends of the inner arc surface of the third arc-shaped member, a first raised block and a second raised block are respectively provided. The outer arc surface of the fourth arc-shaped member is connected to the inner arc surface of the third arc-shaped member. Starting from the outer arc surface of the fourth arc-shaped member, the arc length gradually decreases along its radial direction. The second circular member is connected to the inner arc surface of the fourth arc-shaped member.

[0014] The rotating port component includes: a fifth arc-shaped member, a sixth arc-shaped member, a third raised block and a fourth raised block. The fifth arc-shaped member is an extension of the other end side wall of the snake bone joint along its axial direction. The outer arc surface of the sixth arc-shaped member is connected to the inner arc surface of the fifth arc-shaped member. At both ends of the outer arc surface of the sixth arc-shaped member, a third raised block and a fourth raised block are respectively provided.

[0015] Both ends of the third arc-shaped member, as well as the first raised block and the second raised block, are matched with the space enclosed by the snake bone joint, the fifth arc-shaped member and the sixth arc-shaped member. Both ends of the sixth arc-shaped member, as well as the third raised block and the fourth raised block, are matched with the space enclosed by the third arc-shaped member and the second circular member.

[0016] Further preferably, in the coarse adjustment section, T-shaped members and trapezoidal bayonets are also provided at both axial ends of the coarse adjustment snake bone joint.

[0017] The T-shaped member is an extension of one end side wall of the coarse adjustment snake bone joint along its axial direction.

[0018] A trapezoidal groove is dug inward at the other end of the coarse adjustment snake bone joint to serve as a trapezoidal bayonet. The trapezoidal opening is matched with the T-shaped member.

[0019] At both ends of the entrance of the trapezoidal bayonet, a fifth raised block and a sixth raised block are respectively provided. The fifth raised block and the sixth raised block cooperate with each other to limit the T-shaped member.

[0020] Among them, along the direction from the tail end to the head end of the snake bone, the lengths of both the coarse-adjustable snake bone joints and the fine-adjustable snake bone joints decrease in sequence.

[0021] In another case, the lengths among several coarse-adjustable snake bone joints are all the same, the lengths among several fine-adjustable snake bone joints are all the same, and the length of the coarse-adjustable snake bone joint is twice the length of the fine-adjustable snake bone joint.

[0022] In another case, the lengths among several coarse-adjustable snake bone joints are all the same, the lengths among several fine-adjustable snake bone joints are all the same, and the lengths among several intermediate snake bone joints are all the same;

[0023] The length of the intermediate snake bone joint is 0.7 times the length of the coarse-adjustable snake bone joint, and the length of the fine-adjustable snake bone joint is 0.7 times the length of the intermediate snake bone joint.

[0024] Further preferably, a bending groove is also formed on the snake bone joint for passing an endoscope steel wire rope through the groove to pull each snake bone joint to rotate and bend flexibly.

[0025] Due to the adoption of the above technical solutions, the present utility model has the following advantages and positive effects compared with the prior art:

[0026] The present utility model can ensure the flexibility of the snake bone, has good lateral bending resistance strength, small axial rotation error, is convenient for processing, has low cost, can effectively avoid the snake bone falling off and breaking due to multiple bends or excessive tension on the snake bone, and reduces the safety risk during the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present utility model.

[0028] Figure 1 is an overall structural schematic diagram of a disposable ureteral flexible endoscope snake bone of the present utility model;

[0029] Figure 2 is of the present utility model Figure 1 structural schematic diagram of the middle rotating shaft component and the rotating port component;

[0030] Figure 3 is of the present utility model Figure 1 structural schematic diagram of the middle T-shaped part and the trapezoidal bayonet;

[0031] Figure 4 is of the present utility model Figure 1 structural schematic diagram of the middle bending groove;

[0032] Figure 5This is the overall structural schematic diagram of the second disposable ureteral flexible endoscope snake bone of the present utility model;

[0033] Figure 6 This is of the present utility model Figure 5 structural schematic diagram of the central rotating shaft component and the rotating port component;

[0034] Figure 7 This is the overall structural schematic diagram of the third disposable ureteral flexible endoscope snake bone of the present utility model

[0035] Figure 8 This is of the present utility model Figure 7 structural schematic diagram of the central rotating shaft component and the rotating port component.

[0036] Explanation of reference numerals

[0037] 1: Coarse adjustment section; 101: Coarse adjustment snake bone joint; 2: Fine adjustment section; 201: Fine adjustment snake bone joint; 3: Intermediate section; 4: Snake bone head end; 5: Snake bone tail end; 6: Rotating shaft component; 601: First arc-shaped piece; 602: First circular piece; 603: Third arc-shaped piece; 604: Fourth arc-shaped piece; 605: Second circular piece; 7: Rotating port component; 701: Second arc-shaped piece; 702: Fifth arc-shaped piece; 703: Sixth arc-shaped piece; 8: T-shaped piece; 9: Trapezoidal bayonet; 10: Bending groove. Detailed implementation manners

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the specific implementation manners of the present utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings, and other implementation manners can be obtained.

[0039] To make the drawings concise, only the parts related to the present utility model are schematically shown in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, components with the same structure or function are only schematically shown for one of them, or only one of them is marked. In this article, "one" not only means "only this one", but also means "more than one" situation.

[0040] The following further details a disposable ureteral flexible endoscope snake bone proposed by the present utility model with reference to the accompanying drawings and specific embodiments. According to the following description and the claims, the advantages and features of the present utility model will be clearer.

[0041] Embodiment 1

[0042] Refer to Figures 1 to 4, this embodiment provides a disposable flexible ureteroscope snake bone, which mainly includes a coarse adjustment section 1 and a fine adjustment section 2. In the coarse adjustment section 1, there are several coarse adjustment snake bone joints 101, and the coarse adjustment snake bone joints 101 are sequentially hinged to each other. One end of the coarse adjustment section 1 is the snake bone tail end 5. One end of the fine adjustment section 2 is the snake bone head end 4, and the snake bone head end 4 is provided with a notch for connecting with the endoscope imaging component. The other end of the fine adjustment section 2 is connected to the other end of the coarse adjustment section 1. The fine adjustment section 2 includes several fine adjustment snake bone joints 201, and the fine adjustment snake bone joints 201 are sequentially hinged to each other.

[0043] Then, along the direction from the snake bone tail end 5 to the snake bone head end 4, the lengths of both the coarse adjustment snake bone joints 101 and the fine adjustment snake bone joints 201 gradually decrease, so as to ensure that the front end 4 of the snake bone is flexible in bending and has a larger bending angle. The bone joint of the snake bone tail end 5 is longer than any other snake bone joint, which is beneficial to providing support for the overall snake bone during the swinging process of the snake bone.

[0044] See Figure 2 , except for the snake bone joints at both ends, rotating shaft components 6 and rotating port components 7 are provided at both axial ends of the remaining snake bone joints, and the rotating shaft components 6 and the rotating port components 7 in adjacent snake bone joints are hinged end to end. For the convenience of description, the rotating shaft component 6 can be split into a first arc-shaped part 601 and a first circular part 602 (actually an integral structure). The first arc-shaped part 601 is obtained by extending the side wall of one end of the snake bone joint along its axial direction, and starting from the outer arc surface of the first arc-shaped part 601, its arc length gradually decreases along its radial direction. The first circular part 602 is connected to the inner arc surface of the first arc-shaped part 601. Similarly, the rotating port component 7 is a second arc-shaped part 701, and the second arc-shaped part 701 is obtained by extending the side wall of the other end of the snake bone joint along its axial direction. The space surrounded by the second arc-shaped part 701 forms a first circular groove and a first arc-shaped groove. The first circular groove is matched with the first circular part 602, and the first arc-shaped groove is matched with the first arc-shaped part 601. That is, the angle between the two mating inclined surfaces of the rotating shaft component 6 and the rotating port component 7 is the same as the angle that each section of the snake bone swings during the bending process, and the inner arc surface of the second arc-shaped part 701 is 3 / 4 of a circle, and the two form an inverted buckle structure, thereby increasing the lateral bending resistance during the swinging process of the snake bone.

[0045] Preferably, see Figure 3, in the coarse adjustment section 1, T-shaped parts 8 and trapezoidal bayonets 9 are further provided at both axial ends of the coarse adjustment snake bone joint 101. The T-shaped part 8 is an extension of one end side wall of the coarse adjustment snake bone joint 101 along its axial direction. A trapezoidal groove is dug inward at the other end of the coarse adjustment snake bone joint 101 as the trapezoidal bayonet 9, and the trapezoidal opening is matched with the T-shaped part 8. Fifth raised blocks and sixth raised blocks are respectively provided at both ends of the entrance of the trapezoidal bayonet 9, and the fifth raised block and the sixth raised block cooperate with each other to limit the T-shaped part 8. By means of the controllable T-shaped part 8, the axial bending error of the snake bone is reduced and the lateral bending resistance of the snake bone is strengthened, and the risks of the snake bone falling off and breaking are reduced. During the bending process of the snake bone, the T-shaped part 8 will gradually move towards the opening of the trapezoidal bayonet 9, and the fitting clearance at both ends will gradually decrease. During the process of the snake bone returning to the vertical state, the T-shaped part 8 will gradually move towards the inner side of the trapezoidal bayonet 9 again, and the fitting clearance at both ends will gradually increase, thus effectively avoiding the phenomenon that the snake bone will get stuck during the movement process.

[0046] Preferably, referring to Figure 1 and Figure 4 , bending grooves 10 are also provided on the snake bone joints. In the fine adjustment section 2, bending grooves 10 are provided on every two adjacent fine adjustment snake bone joints 201. In the coarse adjustment section 1, a bending groove 10 is provided on every other coarse adjustment snake bone joint 101. The setting of the bending groove 10 facilitates the endoscope steel wire rope to pass through the groove to pull each snake bone joint to rotate and bend flexibly.

[0047] Embodiment 2

[0048] Referring to Figure 5 and Figure 6 , this embodiment provides a disposable ureteral flexible endoscope snake bone in another implementation manner different from Embodiment 1, which also includes: a coarse adjustment section 1 and a fine adjustment section 2. Similarly, in the coarse adjustment section 1, it includes a plurality of coarse adjustment snake bone joints, and the coarse adjustment snake bone joints are sequentially hinged to each other. One end of the coarse adjustment section 1 is the tail end of the snake bone. One end of the fine adjustment section 2 is the head end of the snake bone, and a notch is opened at the head end of the snake bone to facilitate connection with the endoscope imaging component. The other end of the fine adjustment section 2 is connected to the other end of the coarse adjustment section 1. The fine adjustment section 2 includes a plurality of fine adjustment snake bone joints, and the fine adjustment snake bone joints are sequentially hinged to each other.

[0049] Then, the lengths between the coarse adjustment snake bone joints are all the same, the lengths between the fine adjustment snake bone joints are also the same, and the length of the coarse adjustment snake bone joint is about twice the length of the fine adjustment snake bone joint. The pitch of the fine adjustment snake bone joints is uniformly short, which ensures that the front end of the snake bone bends flexibly and has a larger bending angle, and is closer to a circle. The pitch of the coarse adjustment snake bone joints is long, which is beneficial to the uniform stress of each snake bone during the swinging process of the snake bone and reduces the risks of the snake bone falling off and breaking from the tail end.

[0050] Referring to Figure 6, a double-rotating-axis and double-buckle structure is adopted between the snake bone joints to achieve relative rotation between the joints. The rotating shaft component 6 at the tail end of the previous bone joint cooperates with the rotating port component 7 of the next bone joint. Specifically, the rotating shaft component 6 can be disassembled into a third arc-shaped piece 603, a fourth arc-shaped piece 604, a second circular piece 605, a first raised block, and a second raised block. The third arc-shaped piece 603 is an extension of one end side wall of the snake bone joint along its axial direction. A first raised block and a second raised block are respectively provided at both ends of the inner arc surface of the third arc-shaped piece 603. The outer arc surface of the fourth arc-shaped piece 604 is connected to the inner arc surface of the third arc-shaped piece 603. Starting from the outer arc surface of the fourth arc-shaped piece 604 (whose shape is the same as that of the first arc-shaped piece in Embodiment 1), its arc length gradually decreases along its radial direction; the second circular piece 605 (whose shape is the same as that of the first circular piece in Embodiment 1) is connected to the inner arc surface of the fourth arc-shaped piece 604.

[0051] Next, the rotating port component 7 includes: a fifth arc-shaped piece 702, a sixth arc-shaped piece 703, a third raised block, and a fourth raised block. The fifth arc-shaped piece 702 is an extension of the other end side wall of the snake bone joint along its axial direction (whose shape is the same as that of the first arc-shaped piece in Embodiment 1). The outer arc surface of the sixth arc-shaped piece 703 is connected to the inner arc surface of the fifth arc-shaped piece 702. The centers of the sixth arc-shaped piece 703 and the fifth arc-shaped piece 702 are in the same direction. In addition, a third raised block and a fourth raised block are respectively provided at both ends of the outer arc surface of the sixth arc-shaped piece 703.

[0052] Now, the cooperation between the two is described: Both ends of the third arc-shaped piece 603, as well as the first raised block and the second raised block, cooperate with the two arc-shaped grooves formed by the snake bone joint, the fifth arc-shaped piece 702, and the sixth arc-shaped piece 703, that is, both ends of the third arc-shaped piece 603 of the next bone joint are buckled into the arc-shaped grooves formed by the previous bone joint. Both ends of the sixth arc-shaped piece 703, as well as the third raised block and the fourth raised block, cooperate with the other two arc-shaped grooves formed by the third arc-shaped piece 603 and the second circular piece 605, that is, both ends of the sixth arc-shaped piece 703 of the previous bone joint are buckled into the arc-shaped grooves formed by the next bone joint in turn. In addition, both the rotating shaft component 6 and the buckle component are provided with bevel angles, and the angle of each bevel angle is the same as the angle swung during the bending process of each snake bone joint, so as to ensure that after each bevel surface touches the bevel surface, it can be limited to the swinging angle required for each snake bone joint. Moreover, there is an inverted buckle structure between each rotating shaft and the rotating port, which increases the lateral bending resistance during the swinging process of the snake bone and reduces the axial rotation error.

[0053] Preferably, a bending groove 10 is provided on every other snake bone joint, which is convenient for the endoscope steel wire rope to pass through the groove and drive the flexible rotation and bending of each snake bone joint.

[0054] Embodiment 3

[0055] SeeFigure 7 and Figure 8 , this embodiment provides a disposable flexible ureteroscope snake bone with another implementation different from those of Embodiment 1 and Embodiment 2, which includes: a coarse adjustment section 1, an intermediate section 3, and a fine adjustment section 2. The coarse adjustment section 1 includes a plurality of coarse adjustment snake bone joints, and the coarse adjustment snake bone joints are sequentially hinged to each other. One end of the coarse adjustment section 1 is the tail end of the snake bone. The intermediate section includes a plurality of intermediate snake bone joints, and the intermediate snake bone joints are sequentially hinged to each other. The intermediate snake bone joints at both ends of the intermediate section are respectively hinged to the adjacent coarse adjustment snake bone joints and fine adjustment snake bone joints. One end of the fine adjustment section 2 is the head end of the snake bone, and the head end of the snake bone is connected to the endoscope imaging component. The fine adjustment section 2 includes a plurality of fine adjustment snake bone joints, and the fine adjustment snake bone joints are sequentially hinged to each other.

[0056] The pitch of each joint of each coarse adjustment snake bone joint is the same, the pitch of each joint of each intermediate snake bone joint is the same, and the pitch of each joint of each fine adjustment snake bone joint is the same. The pitch of each joint of the coarse adjustment snake bone joint is greater than the pitch of each joint of the intermediate snake bone joint, and the pitch of each joint of the intermediate snake bone joint is greater than the pitch of each joint of the fine adjustment snake bone joint. The pitch length of each joint of the fine adjustment snake bone joint is about 0.7 times the pitch length of each joint of the intermediate snake bone joint, and the pitch length of each joint of the intermediate snake bone joint is about 0.7 times the pitch length of each joint of the coarse adjustment snake bone joint. In this way, the snake bone pitch gradually becomes longer from the front to the tail of the snake bone, ensuring that the front end of the snake bone is flexible in bending and has a larger bending angle. The long pitch of the coarse adjustment snake bone joint is beneficial to the uniform force of each snake bone during the swinging process of the snake bone, reducing the risk of the snake bone falling off and breaking from the tail end.

[0057] Refer to Figure 8 , in this embodiment, a rotating shaft component 6 and a rotating port component 7 are provided at both axial ends of each snake bone joint. The rotating shaft component 6 and the rotating port component 7 in adjacent snake bone joints are hinged end to end. The rotating shaft component 6 includes a fifth arc-shaped member 702, a sixth arc-shaped member 703, a third convex block, and a fourth convex block. The rotating port component 7 includes a fifth arc-shaped member 702, a sixth arc-shaped member 703, a third convex block, and a fourth convex block. Since the setting methods of the above-mentioned rotating shaft component 6 and rotating port component 7 are the same as those in Embodiment 2, they will not be described here.

[0058] Refer to Figure 8 , this embodiment also provides a T-shaped member 8 and a trapezoidal bayonet 9 at both axial ends of the coarse adjustment snake bone joint. Since the setting methods of the above-mentioned T-shaped member 8 and trapezoidal bayonet 9 are the same as those in Embodiment 1, they will not be described here.

[0059] Preferably, a bending groove 10 is further formed on the snake bone joint. In the middle section 3 and the fine-tuning section 2, the bending groove 10 is formed on every two adjacent snake bones. In the coarse-tuning section 1, the bending groove 10 is provided on every other two snake bones. Thus, it is convenient for the endoscope steel wire rope to pass through the bending groove 10, and to flexibly rotate and bend each snake bone by pulling.

[0060] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, provided that these changes fall within the scope of the claims of the present invention and their equivalent technologies, they still fall within the protection scope of the present invention.

Claims

1. A disposable ureteral soft cobra bone, characterized in that: include: A coarse adjustment section includes a plurality of coarse adjustment snake bone joints, wherein the plurality of coarse adjustment snake bone joints are hinged to each other in sequence, and one end of the coarse adjustment section is the tail end of the snake bone; A fine-tuning segment, one end of which is a snake bone end, which is connected to the endoscope imaging component, and the other end of the fine-tuning segment is connected to the other end of the coarse-adjusting segment. The fine-tuning segment includes a plurality of fine-tuning snake bone joints, which are hinged to each other in sequence, the lengths of the fine-tuning snake bone joints are all smaller than the lengths of the coarse-adjusting snake bone joints, and the bending curvature of the fine-tuning segment is greater than the bending curvature of the coarse-adjusting segment.

2. A disposable ureteral soft mirror snake bone according to claim 1, characterized in that: An intermediate section is provided between the coarse adjustment section and the fine adjustment section, and the intermediate section includes a plurality of intermediate snake bone joints, and the plurality of intermediate snake bone joints are hinged to each other in sequence, and the intermediate snake bone joints located at both ends of the intermediate section are respectively hinged to the adjacent coarse adjustment snake bone joints and the fine adjustment snake bone joints; The length of the middle snake bone joint is between the length of the fine-adjustment snake bone joint and the length of the coarse-adjustment snake bone joint, and the curvature of the middle snake bone joint is between the curvature of the fine-adjustment snake bone joint and the curvature of the coarse-adjustment snake bone joint.

3. A disposable ureteral soft mirror snake bone according to claim 1 or 2, characterized in that: Axial ends of each snake bone joint are provided with a rotating shaft component and a rotating mouth component, and the rotating shaft components and rotating mouth components in adjacent snake bone joints are hinged end to end.

4. A disposable ureteral soft mirror snake bone according to claim 3, characterized in that: The shaft component comprises: a first arc-shaped component and a first circular component, wherein the first arc-shaped component is an extension of a side wall of one end of the snake bone joint along its axial direction, and the arc length thereof gradually decreases along its radial direction from the outer arc surface of the first arc-shaped component, and the first circular component is connected to the inner arc surface of the first arc-shaped component; The rotating mouth component includes: a second arc-shaped component, which is an extension of the side wall of the other end of the snake bone joint along its axial direction, and the space enclosed by the second arc-shaped component constitutes a first circular groove and a first arc-shaped groove, the first circular groove cooperates with the first circular component, and the first arc-shaped groove cooperates with the first arc-shaped component.

5. The disposable ureteral soft mirror snake bone according to claim 3, characterized in that: The shaft component comprises: a third arc-shaped component, a fourth arc-shaped component, a second circular component, a first protruding block and a second protruding block; the third arc-shaped component is an extension of the side wall of one end of the snake bone joint along its axial direction, and the first protruding block and the second protruding block are respectively arranged at two ends of the inner arc surface of the third arc-shaped component; the outer arc surface of the fourth arc-shaped component is connected to the inner arc surface of the third arc-shaped component, and the arc length thereof gradually decreases along its radial direction from the outer arc surface of the fourth arc-shaped component; the second circular component is connected to the inner arc surface of the fourth arc-shaped component; The rotating mouth component comprises: a fifth arc-shaped component, a sixth arc-shaped component, a third protruding block and a fourth protruding block; the fifth arc-shaped component is an extension of the side wall of the other end of the snake bone joint along its axial direction, the outer arc surface of the sixth arc-shaped component is connected to the inner arc surface of the fifth arc-shaped component, and the third protruding block and the fourth protruding block are respectively arranged at two ends of the outer arc surface of the sixth arc-shaped component; The two ends of the third arc-shaped member and the first and second protruding blocks cooperate with the space enclosed by the snake bone joint, the fifth arc-shaped member and the sixth arc-shaped member; the two ends of the sixth arc-shaped member and the third protruding blocks and the fourth protruding blocks cooperate with the space enclosed by the third arc-shaped member and the second circular member.

6. The disposable ureteral soft mirror snake bone according to claim 1, characterized in that: In the coarse adjustment section, two axial ends of the coarse adjustment snake bone joint are also provided with T-shaped pieces and trapezoidal bayonet; The T-shaped piece is an extension of the side wall of one end of the coarse adjustment snake bone condyle along its axial direction; The other end of the coarse adjustment snake bone segment is dug inwardly to have a trapezoidal groove as the trapezoidal bayonet, and the trapezoidal opening is matched with the T-shaped piece; A fifth protruding block and a sixth protruding block are respectively provided at both ends of the entrance of the trapezoidal bayonet, and the fifth protruding block and the sixth protruding block cooperate with each other to limit the T-shaped piece.

7. The disposable ureteral soft mirror snake bone according to claim 1, characterized in that: Along the direction from the tail end of the snake bone to the head end of the snake bone, the lengths of the coarse adjustment snake bone joints and the fine adjustment snake bone joints are reduced in sequence.

8. The disposable ureteral soft mirror snake bone according to claim 1, characterized in that: The lengths of several of the coarse adjustment snake bone joints are consistent, the lengths of several of the fine adjustment snake bone joints are consistent, and the length of the coarse adjustment snake bone joints is twice the length of the fine adjustment snake bone joints.

9. The disposable ureteral soft mirror snake bone according to claim 2, characterized in that: The lengths between the coarse adjustment snake bone joints are consistent, the lengths between the fine adjustment snake bone joints are consistent, and the lengths between the intermediate snake bone joints are consistent; The length of the middle snake bone joint is 0.7 times the length of the coarse adjustment snake bone joint, and the length of the fine adjustment snake bone joint is 0.7 times the length of the middle snake bone joint.

10. The disposable ureteral soft cobra bone according to claim 1, characterized in that: The snake bone joints are also provided with bending grooves for passing the endoscope wire rope through the grooves to pull each snake bone joint to rotate and bend it.

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