Snake bone device for endoscope
By introducing anti-torsion modules and arc-shaped shrapnel into the endoscope's cocoon bone device, dispersing the lateral torque and providing buffering, the problem of easy damage to the connection node of the snake bone assembly in the prior art is solved, and the stability and use of the device are improved. life.
Patent Information
- Application Number
- CN202411543810.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2024-12-17
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
When the bidirectional snake bone assembly in existing endoscopes is subjected to lateral torque, the connecting nodes bear more torque, resulting in a higher damage rate.
A device consisting of multiple sets of snake joints, connecting ends and wire ropes is designed. By setting up anti-torsion modules and arc-shaped shrapnel in the connection module, the anti-torsion module is dispersed by a secondary circular ring, anti-torsion rod and rotary ring. With transverse torque, arc-shaped shrapnel provides buffering space to protect snake joints.
It effectively reduces the torque of the connecting module to prevent it from being damaged, and protects the snake joints through the buffering effect of the arc-shaped shrapnel to avoid mutual compression and damage.
Smart Images
Figure CN119138826A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of snake bone components, and in particular relates to a snake bone device for an endoscope. Background Art
[0002] Endoscopes have been widely used in the diagnosis and treatment of diseases. When using an endoscope, the insertion part of the endoscope needs to be inserted into the patient's body, and the active bending section of the insertion part is pulled by a steel wire to achieve bending action, and then the direction of the distal end of the insertion part is adjusted to obtain image information of the target part. The active bending section usually adopts a riveted snake bone assembly, and its specific structure is to connect adjacent snake bones with rivets, and use the rivets as a rotating shaft to achieve rotational coordination;
[0003] However, in the prior art, for a bidirectional snake bone assembly, when it is subjected to lateral torque, the connection node between two adjacent snake bone sections will bear more torque, making the connection node a component with a higher damage rate due to torque in the snake bone device. Summary of the invention
[0004] The object of the present invention is to provide a snake bone device for an endoscope to solve the problems raised in the above-mentioned background technology.
[0005] To achieve the above object, the present invention provides the following technical solutions:
[0006] A snake bone device for an endoscope, comprising a plurality of groups of snake bone joints, a connecting end and a steel wire rope, wherein two groups of connecting ends are symmetrically arranged in the upper and lower parts, and the connecting ends are respectively connected to the snake bone joints at the top and the snake bone joints at the bottom, and the steel wire rope is symmetrically arranged in the connecting end at the top, and the bottom end of the steel wire rope passes through the plurality of groups of snake bone joints and the connecting end at the bottom in sequence;
[0007] A connection module is connected between two adjacent groups of snake bones, and the connection module includes an upper connection member, a lower connection member and a rotating shaft that are symmetrically arranged on the left and right. Two groups of lower connection members are arranged between the two groups of upper connection members, the top end of the upper connection member is connected to the snake bone joint, and the bottom end of the lower connection member is connected to the snake bone joint. The rotating shaft is rotatably connected between the upper connection member and the lower connection member, and the upper and lower groups of snake bones are rotated bidirectionally through the upper connection member, the lower connection member and the rotating shaft.
[0008] An anti-twist module is connected between the connecting module and the upper and lower groups of serpentine joints. The anti-twist module includes a secondary circular ring, an upper anti-twist rod, a lower anti-twist rod, a primary rotating ring and a secondary rotating ring. The primary rotating ring and the secondary rotating ring are both sleeved on the outer wall of the rotating shaft, the upper anti-twist rod is arranged above the primary rotating ring, and the lower anti-twist rod is arranged below the secondary rotating ring. The secondary circular ring is sleeved on the outer walls of the upper anti-twist rod and the lower anti-twist rod respectively. The upper anti-twist rod is rotated with the serpentine joint located above through the primary rotating ring, and the lower anti-twist rod is rotated with the serpentine joint located below through the secondary rotating ring. Therefore, the lateral torque applied to the connecting module is dispersed through the anti-twist module without affecting the rotation of the serpentine joint, that is, part of the torque is dispersed to the serpentine joint, thereby reducing the torque applied to the connecting module, so that the upper connecting member and the lower connecting member in the connecting module are not easily damaged.
[0009] Preferably, a primary circular collar is symmetrically arranged on the inner wall of the snake bone joint, a primary connecting frame is connected to the outer wall of the primary circular collar, and the primary connecting frame is fitted with the inner wall of the snake bone joint, and the primary connecting frame is symmetrically connected to the primary assembly plate on the left and right sides, and the primary assembly plate is fixedly connected to the snake bone joint through a positioning bolt, and the primary assembly plate is convenient for disassembly and assembly between the primary connecting frame and the primary circular collar and the snake bone joint, which is convenient for maintenance and replacement and setting of the wire rope;
[0010] The primary circular collar is sleeved on the outer wall of the steel wire rope to better connect the steel wire rope to the snake joint.
[0011] Preferably, the anti-twist module further comprises a primary limiting ring groove, a primary anti-slip ring, a secondary limiting ring groove and a secondary anti-slip ring, the primary limiting ring groove and the secondary limiting ring groove are both arranged on the outer wall of the rotating shaft, the primary anti-slip ring is slidably fitted in the primary limiting ring groove, and the secondary anti-slip ring is slidably fitted in the secondary limiting ring groove;
[0012] The outer wall of the first-level anti-slip ring is connected to the middle part of the inner wall of the first-level rotating ring to restrict the first-level rotating ring and prevent the first-level rotating ring from detaching from the rotating shaft;
[0013] The outer wall of the secondary anti-slip ring is connected to the middle part of the inner wall of the secondary rotating ring to restrict the secondary rotating ring and prevent the secondary rotating ring from escaping from the rotating shaft.
[0014] Preferably, the anti-twist module also includes a tightening rod and a threaded hole, the tightening rod is respectively connected to the middle of the bottom end of the upper anti-twist rod and the middle of the top end of the lower anti-twist rod, the threaded holes are respectively opened in the middle of the top end of the primary rotating ring and the middle of the bottom end of the secondary rotating ring, the bottom end of the tightening rod located above and the top end of the tightening rod located below are both threadedly connected to the threaded holes, and the upper anti-twist rod and the primary rotating ring, as well as the lower anti-twist rod and the secondary rotating ring are respectively connected and fixed through the tightening rod and the threaded hole.
[0015] Preferably, the anti-twist module also includes a secondary connecting frame and a secondary assembly plate. The secondary connecting frame is connected to the outer wall of the secondary circular ring, and the secondary connecting frame is in contact with the inner wall of the snake bone joint. The secondary assembly plate is symmetrically connected to both sides of the secondary connecting frame front and back, and the secondary assembly plate is fixedly connected to the snake bone joint through a positioning bolt, thereby connecting and fixing the secondary circular ring and the snake bone joint.
[0016] Preferably, a three-stage rotating ring is sleeved on the outer wall of the rotating shaft, the three-stage rotating ring is located between the lower connecting piece and the first-stage rotating ring, and a three-stage anti-slip ring is connected to the middle of the inner wall of the three-stage rotating ring, so that the arc-shaped spring piece has a rotating effect;
[0017] A three-stage limiting ring groove is provided on the outer wall of the rotating shaft, and the three-stage anti-slip ring is slidably fitted in the three-stage limiting ring groove. Without affecting the rotation effect of the three-stage rotating ring, the three-stage rotating ring is restricted, so that the three-stage rotating ring is not easy to move laterally on the outer wall of the rotating shaft.
[0018] Preferably, the three-stage rotating ring is symmetrically connected to the front and rear arc plates, and two groups of arc springs are connected between the left and right groups of arc plates, and the arc springs are symmetrically arranged up and down, and a gap is left between the upper and lower groups of arc springs. The arrangement of the arc springs can provide a certain buffer space to prevent the upper and lower groups of snake joints from being squeezed and damaged by the continued force applied after the contact between the upper and lower groups of snake joints, that is, when the upper and lower groups of snake joints rotate, the upper and lower groups of arc springs will contact the two groups of snake joints respectively, and as the two groups of snake joints continue to rotate, the arc springs will be pressed tightly to buffer the snake joints, thereby better protecting the snake joints;
[0019] An inner groove is provided in the middle of the inner wall of the arc-shaped spring piece, which reduces the deadweight of the arc-shaped spring piece and better increases the distance between the arc-shaped spring piece and the wire rope;
[0020] A gap is left between the inner wall of the arc-shaped spring piece and the steel wire rope to prevent the arc-shaped spring piece and the steel wire rope from contacting and affecting each other.
[0021] Preferably, an arc-shaped extension plate is provided above the upper arc-shaped spring piece and below the lower arc-shaped spring piece, and the inner wall of the arc-shaped extension plate is connected to the snake bone joint, which has a certain lengthening effect, so that the snake bone joint can better contact with the arc-shaped spring piece when rotating.
[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: when the present invention is in use, the anti-twist module can play a certain rotation limiting role without affecting the bidirectional rotation effect of the snake bone joint, that is, when the snake bone device is subjected to a certain lateral rotational force, the anti-twist module can disperse part of the torque to the snake bone joint, reduce the torque borne by the connecting module, and make the connecting module less likely to be damaged; the setting of the arc-shaped spring sheet can provide a certain buffer space to prevent the upper and lower groups of snake bone joints from being squeezed and damaged by the continued force applied after the contact, that is, when the upper and lower groups of snake bone joints rotate, the upper and lower groups of arc-shaped spring sheets will contact the two groups of snake bone joints respectively, and as the two groups of snake bone joints continue to rotate, the arc-shaped spring sheets will be pressed tightly to buffer the snake bone joints, thereby better protecting the snake bone joints. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 The figure is a schematic diagram of the overall structure of a snake-bone device for an endoscope.
[0024] Figure 2 A schematic diagram of an arc-shaped shrapnel of a snake-bone device for an endoscope.
[0025] Figure 3 A cross-sectional view of a snake bone segment of a snake bone device for an endoscope.
[0026] Figure 4 A schematic diagram of a connection module of a snake-bone device for an endoscope.
[0027] Figure 5 The figure is a schematic diagram of the rotation axis connection of a snake-bone device for an endoscope.
[0028] Figure 6 A schematic diagram of a threaded hole of a snake device for an endoscope.
[0029] Figure 7 The figure is a schematic diagram of a primary limiting ring groove of a snake bone device for an endoscope.
[0030] In the figure: 1. snake bone joint; 2. connecting end; 3. wire rope; 4. connecting module; 41. upper connecting piece; 42. lower connecting piece; 43. rotating shaft; 431. three-level rotating ring; 432. three-level anti-slip ring; 433. three-level limiting ring groove; 434. arc plate; 435. arc spring piece; 436. inner groove mouth; 437. arc extension plate; 5. anti-twist module; 51. secondary circular collar; 52. upper anti-twist rod; 53. lower anti-twist rod; 54. primary rotating ring; 55. secondary rotating ring; 56. primary limiting ring groove; 57. primary anti-slip ring; 58. secondary limiting ring groove; 59. secondary anti-slip ring; 510. tightening rod; 511. threaded hole; 512. secondary connecting frame; 513. secondary assembly plate; 6. primary circular collar; 7. primary connecting frame; 8. primary assembly plate. DETAILED DESCRIPTION
[0031] Example 1
[0032] See also Figure 1-Figure 7 As shown, a snake bone device for an endoscope comprises a plurality of groups of snake bone joints 1, a connecting end 2 and a steel wire 3, wherein the connecting end 2 is symmetrically provided with two groups, and the connecting end 2 is respectively connected to the snake bone joint 1 at the top and the snake bone joint 1 at the bottom, the steel wire 3 is symmetrically provided in the connecting end 2 at the top, and the bottom end of the steel wire 3 sequentially passes through the plurality of groups of snake bone joints 1 and the connecting end 2 at the bottom;
[0033] A connection module 4 is connected between two adjacent groups of snake bone joints 1. The connection module 4 includes an upper connection member 41, a lower connection member 42 and a rotating shaft 43 which are symmetrically arranged on the left and right. The two groups of lower connection members 42 are arranged between the two groups of upper connection members 41. The top end of the upper connection member 41 is connected to the snake bone joint 1, and the bottom end of the lower connection member 42 is connected to the snake bone joint 1. The rotating shaft 43 is rotatably connected between the upper connection member 41 and the lower connection member 42. Through the upper connection member 41, the lower connection member 42 and the rotating shaft 43, the upper and lower groups of snake bone joints 1 can rotate in both directions.
[0034] An anti-twist module 5 is connected between the connection module 4 and the upper and lower groups of snake bone joints 1. The anti-twist module 5 includes a secondary circular collar 51, an upper anti-twist bar 52, a lower anti-twist bar 53, a primary rotating ring 54 and a secondary rotating ring 55. The primary rotating ring 54 and the secondary rotating ring 55 are both sleeved on the outer wall of the rotating shaft 43. The upper anti-twist bar 52 is arranged above the primary rotating ring 54, and the lower anti-twist bar 53 is arranged below the secondary rotating ring 55. The secondary circular collar 51 is respectively sleeved on the outer walls of the upper anti-twist bar 52 and the lower anti-twist bar 53. The primary rotating ring 54 causes the upper anti-torsion rod 52 to rotate along with the upper serpentine joint 1, and the secondary rotating ring 55 causes the lower anti-torsion rod 53 to rotate along with the lower serpentine joint 1. Thus, without affecting the rotation of the serpentine joint 1, the lateral torque exerted on the connecting module 4 is dispersed through the anti-torsion module 5, that is, part of the torque is dispersed to the serpentine joint 1, thereby reducing the torque exerted on the connecting module 4 and making the upper connecting member 41 and the lower connecting member 42 in the connecting module 4 less likely to be damaged.
[0035] refer to Figure 2 and Figure 3 As shown, the inner wall of the snake bone joint 1 is symmetrically provided with a primary circular ring 6, the outer wall of the primary circular ring 6 is connected with a primary connecting frame 7, and the primary connecting frame 7 is fitted with the inner wall of the snake bone joint 1, and the primary connecting frame 7 is symmetrically connected with a primary assembly plate 8, and the primary assembly plate 8 is fixedly connected to the snake bone joint 1 through a positioning bolt. Through the primary assembly plate 8, it is convenient to disassemble and assemble the primary connecting frame 7 and the primary circular ring 6 from the snake bone joint 1, which is convenient for maintenance and replacement and the setting of the wire rope 3;
[0036] The primary circular ring 6 is sleeved on the outer wall of the steel wire rope 3 to better connect the steel wire rope 3 and the snake bone joint 1.
[0037] refer to Figure 7 As shown, the anti-twist module 5 also includes a primary limiting ring groove 56, a primary anti-slip ring 57, a secondary limiting ring groove 58 and a secondary anti-slip ring 59. The primary limiting ring groove 56 and the secondary limiting ring groove 58 are both provided on the outer wall of the rotating shaft 43. The primary anti-slip ring 57 is slidably fitted in the primary limiting ring groove 56, and the secondary anti-slip ring 59 is slidably fitted in the secondary limiting ring groove 58.
[0038] The outer wall of the primary anti-slip ring 57 is connected to the middle of the inner wall of the primary rotating ring 54 to restrict the primary rotating ring 54 and prevent the primary rotating ring 54 from escaping from the rotating shaft 43;
[0039] The outer wall of the secondary anti-slip ring 59 is connected to the middle part of the inner wall of the secondary rotating ring 55 to restrict the secondary rotating ring 55 and prevent the secondary rotating ring 55 from escaping from the rotating shaft 43 .
[0040] refer to Figure 3-Figure 6As shown, the anti-twist module 5 also includes a tightening rod 510 and a threaded hole 511. The tightening rod 510 is respectively connected to the middle of the bottom end of the upper anti-twist rod 52 and the middle of the top end of the lower anti-twist rod 53. The threaded holes 511 are respectively opened in the middle of the top end of the primary rotating ring 54 and the middle of the bottom end of the secondary rotating ring 55. The bottom end of the tightening rod 510 located at the top and the top end of the tightening rod 510 located at the bottom are both threadedly connected to the threaded hole 511. Through the tightening rod 510 and the threaded hole 511, the upper anti-twist rod 52 and the primary rotating ring 54, and the lower anti-twist rod 53 and the secondary rotating ring 55 are respectively connected and fixed.
[0041] refer to Figure 2-Figure 5 As shown, the anti-twist module 5 also includes a secondary connecting frame 512 and a secondary assembly plate 513. The secondary connecting frame 512 is connected to the outer wall of the secondary circular ring 51, and the secondary connecting frame 512 is in contact with the inner wall of the snake bone joint 1. The secondary assembly plate 513 is symmetrically connected to both sides of the secondary connecting frame 512 front and back, and the secondary assembly plate 513 is fixedly connected to the snake bone joint 1 through a positioning bolt, so as to connect and fix the secondary circular ring 51 and the snake bone joint 1.
[0042] refer to Figure 3-Figure 7 As shown, the outer wall of the rotating shaft 43 is sleeved with a three-stage rotating ring 431, the three-stage rotating ring 431 is between the lower connecting member 42 and the first-stage rotating ring 54, and the middle of the inner wall of the three-stage rotating ring 431 is connected with a three-stage anti-slip ring 432, so that the arc-shaped spring piece 435 has a rotating effect;
[0043] A three-stage limiting ring groove 433 is provided on the outer wall of the rotating shaft 43, and the three-stage anti-slip ring 432 is slidably fitted in the three-stage limiting ring groove 433. Without affecting the rotation effect of the three-stage rotating ring 431, the three-stage rotating ring 431 is restricted, so that the three-stage rotating ring 431 is not easy to move laterally on the outer wall of the rotating shaft 43.
[0044] refer to Figure 1-Figure 4 As shown, the three-stage rotating ring 431 is symmetrically connected to the arc plate 434 front and back, and two groups of arc spring pieces 435 are connected between the left and right groups of arc plate pieces 434, and the arc spring pieces 435 are symmetrically arranged up and down, and a gap is left between the upper and lower groups of arc spring pieces 435. The arrangement of the arc spring pieces 435 can provide a certain buffer space to prevent the upper and lower groups of snake bone joints 1 from being squeezed and damaged by the continued force applied after the upper and lower groups of snake bone joints 1 are in contact, that is, when the upper and lower groups of snake bone joints 1 rotate, the upper and lower groups of arc spring pieces 435 will contact the two groups of snake bone joints 1 respectively, and as the two groups of snake bone joints 1 continue to rotate, the arc spring pieces 435 will be pressed tightly to buffer the snake bone joints 1, thereby better protecting the snake bone joints 1;
[0045] An inner groove 436 is provided in the middle of the inner wall of the arc-shaped spring piece 435, which reduces the deadweight of the arc-shaped spring piece 435 and better increases the distance between the arc-shaped spring piece 435 and the steel wire rope 3;
[0046] A gap is left between the inner wall of the arc-shaped spring piece 435 and the steel wire rope 3 to prevent the arc-shaped spring piece 435 and the steel wire rope 3 from contacting and affecting each other.
[0047] refer to Figure 1-Figure 3 As shown, an arc-shaped extension plate 437 is provided above the upper arc-shaped spring piece 435 and below the lower arc-shaped spring piece 435, and the inner wall of the arc-shaped extension plate 437 is connected to the snake bone joint 1, which has a certain lengthening effect, so that when the snake bone joint 1 rotates, it can better contact with the arc-shaped spring piece 435.
[0048] Working principle: The upper and lower groups of snake bone joints 1 are rotated bidirectionally through the connection module 4, the upper anti-twist rod 52 is rotated along with the upper snake bone joint 1 through the primary rotating ring 54, and the lower anti-twist rod 53 is rotated along with the lower snake bone joint 1 through the secondary rotating ring 55, so that the lateral torque on the connection module 4 is dispersed through the anti-twist module 5 without affecting the rotation of the snake bone joint 1, that is, part of the torque is dispersed to the snake bone joint 1, thereby reducing the torque on the connection module 4 and making the connection module 4 less likely to be damaged;
[0049] The setting of the arc-shaped spring clip 435 can provide a certain buffer space to prevent the two groups of snake bone joints 1 from being squeezed and damaged by each other due to the continued force applied after the upper and lower groups of snake bone joints 1 come into contact. That is, when the upper and lower groups of snake bone joints 1 rotate, the upper and lower groups of arc-shaped spring clips 435 will respectively contact the two groups of snake bone joints 1. As the two groups of snake bone joints 1 continue to rotate, the arc-shaped spring clip 435 will be compressed to buffer the snake bone joints 1, thereby better protecting the snake bone joints 1. In addition, the setting of the arc-shaped extension plate 437 has a certain lengthening effect, so that the snake bone joint 1 can better contact the arc-shaped spring clip 435 when it rotates.
[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A snake bone device for an endoscope, comprising a plurality of snake bone segments (1), a connecting end (2) and a steel wire rope (3), characterized in that: Two groups of connecting ends (2) are symmetrically arranged in the upper and lower parts, and the connecting ends (2) are respectively connected to the snake bone joints (1) located at the top and the snake bone joints (1) located at the bottom. The steel wire rope (3) is symmetrically arranged in the connecting end (2) located at the top, and the bottom end of the steel wire rope (3) passes through the multiple groups of snake bone joints (1) and the connecting end (2) located at the bottom in sequence. A connection module (4) is connected between two adjacent groups of snake bone joints (1), and the connection module (4) comprises an upper connection member (41), a lower connection member (42) and a rotation shaft (43) which are symmetrically arranged on the left and right sides. The two groups of lower connection members (42) are arranged between the two groups of upper connection members (41), the top end of the upper connection member (41) is connected to the snake bone joint (1), the bottom end of the lower connection member (42) is connected to the snake bone joint (1), and the rotation shaft (43) is rotatably connected between the upper connection member (41) and the lower connection member (42); An anti-twist module (5) is connected between the connection module (4) and the upper and lower groups of snake bone joints (1). The anti-twist module (5) comprises a secondary circular collar (51), an upper anti-twist bar (52), a lower anti-twist bar (53), a primary rotating ring (54) and a secondary rotating ring (55). The primary rotating ring (54) and the secondary rotating ring (55) are both sleeved on the outer wall of the rotating shaft (43). The upper anti-twist bar (52) is arranged above the primary rotating ring (54), and the lower anti-twist bar (53) is arranged below the secondary rotating ring (55). The secondary circular collar (51) is sleeved on the outer walls of the upper anti-twist bar (52) and the lower anti-twist bar (53).
2. The snake bone device for endoscope according to claim 1, characterized in that: The inner wall of the snake bone joint (1) is symmetrically provided with a first-level circular ring (6) in front and back, the outer wall of the first-level circular ring (6) is connected with a first-level connecting frame (7), and the first-level connecting frame (7) is in close contact with the inner wall of the snake bone joint (1), and the first-level connecting frame (7) is symmetrically connected with a first-level assembly plate (8) in left and right, and the first-level assembly plate (8) is fixedly connected with the snake bone joint (1) through a positioning bolt; The primary circular collar (6) is sleeved on the outer wall of the steel wire rope (3).
3. The snake bone device for endoscope according to claim 1, characterized in that: The anti-twist module (5) further comprises a primary limiting ring groove (56), a primary anti-slip ring (57), a secondary limiting ring groove (58) and a secondary anti-slip ring (59); the primary limiting ring groove (56) and the secondary limiting ring groove (58) are both arranged on the outer wall of the rotating shaft (43); the primary anti-slip ring (57) is slidably fitted in the primary limiting ring groove (56); and the secondary anti-slip ring (59) is slidably fitted in the secondary limiting ring groove (58); The outer wall of the primary anti-slip ring (57) is connected to the middle part of the inner wall of the primary rotating ring (54); The outer wall of the secondary anti-slip ring (59) is connected to the middle part of the inner wall of the secondary rotating ring (55).
4. The snake bone device for endoscope according to claim 1, characterized in that: The anti-twist module (5) further comprises a tightening rod (510) and a threaded hole (511), wherein the tightening rod (510) is respectively connected to the middle of the bottom end of the upper anti-twist rod (52) and the middle of the top end of the lower anti-twist rod (53), and the threaded hole (511) is respectively opened at the middle of the top end of the primary rotating ring (54) and the middle of the bottom end of the secondary rotating ring (55), and the bottom end of the tightening rod (510) located at the top and the top end of the tightening rod (510) located at the bottom are both threadedly connected to the threaded hole (511).
5. The snake bone device for endoscope according to claim 1, characterized in that: The anti-twist module (5) further comprises a secondary connecting frame (512) and a secondary assembly plate (513); the secondary connecting frame (512) is connected to the outer wall of the secondary circular ring (51), and the secondary connecting frame (512) is in close contact with the inner wall of the serpentine joint (1); the secondary assembly plate (513) is symmetrically connected to both sides of the secondary connecting frame (512) in a front-to-back manner, and the secondary assembly plate (513) is fixedly connected to the serpentine joint (1) via a positioning bolt.
6. The snake bone device for endoscope according to claim 1, characterized in that: The outer wall of the rotating shaft (43) is sleeved with a third-level rotating ring (431), the third-level rotating ring (431) is located between the lower connecting piece (42) and the first-level rotating ring (54), and the middle part of the inner wall of the third-level rotating ring (431) is connected with a third-level anti-slip ring (432); The outer wall of the rotating shaft (43) is provided with a three-stage limiting ring groove (433), and the three-stage anti-slip ring (432) is slidably fitted in the three-stage limiting ring groove (433).
7. The snake bone device for endoscope according to claim 6, characterized in that: The third-stage rotating ring (431) is symmetrically connected to an arc-shaped plate (434) in front and back, and two groups of arc-shaped spring pieces (435) are connected between the left and right groups of arc-shaped plate pieces (434). The arc-shaped spring pieces (435) are symmetrically arranged up and down, and a gap is left between the upper and lower groups of arc-shaped spring pieces (435); An inner groove opening (436) is provided in the middle of the inner wall of the arc-shaped spring piece (435); A gap is left between the inner wall of the arc-shaped spring piece (435) and the steel wire rope (3).
8. The snake bone device for endoscope according to claim 7, characterized in that: An arc-shaped extension plate (437) is provided above the upper arc-shaped spring piece (435) and below the lower arc-shaped spring piece (435), and the inner wall of the arc-shaped extension plate (437) is connected to the snake bone joint (1).