Two-direction bent-angle snake bone of medical endoscope
By combining the front connecting ring, the rear connecting ring, and the middle connecting ring, along with the connecting ear, the rotating shaft hook, and the elastic fixing ring, the problems of poor snake bone positioning accuracy and inflexible rotation in the existing technology are solved, and a high-precision, low-cost medical endoscope snake bone design is achieved.
Patent Information
- Application Number
- CN202423188458.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2034-12-23
AI Technical Summary
Existing medical endoscope skeletons suffer from problems such as poor positioning accuracy, inflexible rotation, or high friction in rivet and expansion joint structures, which affect reliability and yield.
It adopts a combination structure of front connecting ring, rear connecting ring and middle connecting ring, and uses symmetrically arranged connecting ears and rotating shaft hooks to cooperate with shaft holes. Combined with elastic fixing rings and glue fixation, it achieves six-point positioning to ensure the stability and flexibility of the snake bone.
This improved the positioning accuracy and rotational flexibility of the snake bone, reduced production costs, and ensured the reliability of the bends and assembly efficiency.
Smart Images
Figure CN223914109U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a snake bone device, concretely relates to two direction bend angle snake bone of medical endoscope belongs to medical instrument technical field. BACKGROUND
[0002] The current domestic and foreign medical flexible endoscope series products are mainly used in the inspection diagnosis and minimally invasive treatment of the inner cavity of the human respiratory system, urinary system, part cavity of ear, inner cavity of nose and throat, etc. Among them, the snake bone is one of the main accessories of the medical flexible endoscope series products or industrial flexible endoscope. The two direction bend angle snake bone is mainly matched with the medical flexible bronchoscope, ureteral nephroscope and other thin medical endoscopes and the industrial flexible endoscope below 8mm.
[0003] The snake bone in the prior art has a rivet structure or an expansion joint structure. The rivet structure of the snake bone is prone to bending and deformation of the rivet shaft during riveting due to abnormal adjustment of the punching machine and installation correction of the riveting die, resulting in unsmooth rotation of the snake bone and low yield. The rivet head is too small to cause the rivet head to fall off, and the bending part of the endoscope is prone to failure during use or the endoscope cannot be used. The connection structure of the expansion joint structure of the snake bone is connected by a connecting structure composed of a boss and a boss groove or a connecting structure composed of a ball head and a ball socket. However, there are only three positioning points after the boss and the boss groove are matched and contacted, which causes the bend angle of the snake bone to deviate and has the disadvantage of poor precision. The connecting structure composed of the ball head and the ball socket can ensure the flexible rotation between different rings, but the rotation friction area is large, and the five-point positioning of this connecting structure also has the disadvantage of relatively low positioning accuracy. SUMMARY
[0004] The utility model aims at providing a two direction bend angle snake bone of medical endoscope which is easy to process, has high positioning accuracy, flexible rotation and reliable bend angle after assembly.
[0005] In order to achieve the above-mentioned purpose, the technical scheme of the utility model is as follows: a two direction bend angle snake bone of medical endoscope, comprising a front connecting ring, a rear end ring and a plurality of middle connecting rings arranged between the front connecting ring and the rear end ring,
[0006] The front connecting ring is provided with two front rope holes arranged symmetrically thereon,
[0007] Each middle connecting ring is provided with two middle rope holes arranged symmetrically thereon, and the middle rope holes correspond to the front rope holes,
[0008] The utility model has the advantages of the following aspects:
[0009] The end of the front connecting ring is provided with front connecting ears arranged symmetrically in the axial direction, and the front connecting ears are provided with rear rotating shaft hooks arranged perpendicularly,
[0010] The two ends of the middle connecting ring are respectively provided with middle connecting ears arranged symmetrically, and the middle connecting ear at one end is provided with a middle shaft hole, and the middle connecting ear at the other end is provided with a middle rotating shaft hook arranged perpendicularly,
[0011] The end of the rear end ring is provided with rear connecting ears arranged symmetrically in the axial direction, and the rear connecting ears are provided with front shaft holes,
[0012] The front connecting ears of the front connecting ring are inserted into the inner holes of the middle connecting rings adjacent to the front connecting ring, and the rear rotating shaft hooks are fitted into the middle shaft holes of the middle connecting rings and are rotationally connected,
[0013] The middle connecting ear at one end of the middle connecting ring adjacent to the rear end ring is inserted into the inner hole of the rear end ring, and the middle rotating shaft hook of the middle connecting ring is fitted into the front shaft hole of the rear end ring and is rotationally connected,
[0014] The middle connecting ear at one end of one of the two adjacent middle connecting rings is inserted into the inner hole of the other middle connecting ring, and the middle rotating shaft hook on the middle connecting ear is fitted into the middle shaft hole of the other middle connecting ring.
[0015] In the above technical solution, the middle connecting ear at one end of the middle connecting ring is provided with a semicircular through hole and a middle spring piece formed by wire cutting, and the middle shaft hole is formed by the semicircular through hole and the semicircular through hole arranged on the middle spring piece,
[0016] The rear connecting ear of the rear end ring is provided with a semicircular through hole and a rear spring piece formed by wire cutting, and the front shaft hole is formed by the semicircular through hole and the semicircular through hole arranged on the rear spring piece.
[0017] In the above technical solution, a plurality of elastic fixing rings are further included, the rear connecting ear of the rear end ring is provided with an elastic fixing ring at the outer periphery close to the front shaft hole to prevent the middle rotating shaft hook connected thereto from moving, and the middle connecting ear at one end of each middle connecting ring is provided with an elastic fixing ring at the outer periphery close to the middle shaft hole to prevent the rear rotating shaft hook or the middle rotating shaft hook connected thereto from moving.
[0018] In the above technical solution, the elastic fixing ring is provided with positioning grooves arranged symmetrically and used for positioning the corresponding rear connecting ear or middle connecting ear.
[0019] In the above technical solution, the elastic fixing ring is in a closed loop structure or has a contraction gap.
[0020] In the technical scheme, the connection between the rear end ring and the middle connecting ring and the corresponding elastic fixing ring is also fixed by point gluing.
[0021] In the technical scheme, the front connecting ring is provided with a front rope blocking plate cut by wire on the inner wall of both sides of the front connecting ring, and the front rope blocking plate is extruded into an arc structure towards the axial direction and forms a front rope passing hole.
[0022] The middle connecting ring is provided with a middle rope blocking plate cut by wire on the inner wall of both sides of the middle connecting ring, and the middle rope blocking plate is extruded into an arc structure towards the axial direction and forms a middle rope passing hole.
[0023] In the technical scheme, the rear rotating shaft hook comprises a rear rotating shaft and a rear hook which are connected as a whole, the rear rotating shaft of the rear rotating shaft hook is arranged in the middle shaft hole of the middle connecting ring adjacent to the rear rotating shaft hook and is rotationally matched, and the rear hook is abutted against the end surface of the corresponding middle connecting lug.
[0024] The middle rotating shaft hook comprises a middle rotating shaft and a middle hook which are connected as a whole, the middle rotating shaft of the middle connecting ring adjacent to the rear end ring is arranged in the inner hole of the rear end ring and is rotationally matched, and the middle hook of the middle connecting ring is abutted against the end surface of the rear connecting lug of the rear end ring.
[0025] The middle rotating shaft of one of the two adjacent middle connecting rings is arranged in the inner hole of the other middle connecting ring and is rotationally matched, and the middle hook is abutted against the end surface of the middle connecting lug of the other middle connecting ring.
[0026] In the technical scheme, the width of the positioning groove of the elastic fixing ring is equal to the width of the corresponding rear connecting lug or middle connecting lug.
[0027] The medical endoscope has the following positive effects: the front connecting lug of the medical endoscope has the rear rotating shaft hook arranged perpendicularly thereto,
[0028] The middle connecting lug of the middle connecting ring is provided with the middle shaft hole on one end of the middle connecting lug and the middle rotating shaft hook arranged perpendicularly thereto on the other end of the middle connecting lug,
[0029] The rear end ring is provided with the rear connecting lug arranged perpendicularly thereto on one end of the rear end ring,
[0030] The front connecting lug of the front connecting ring is inserted into the inner hole of the middle connecting ring adjacent to the front connecting lug, and the rear rotating shaft hook is arranged in the middle shaft hole of the middle connecting ring and is rotationally matched,
[0031] The middle connecting lug at one end of the middle connecting ring adjacent to the rear end ring is inserted into the inner hole of the rear end ring, and meanwhile the middle rotating shaft hook on the middle connecting lug is hooked into the front shaft hole of the rear end ring and is rotationally matched,
[0032] The middle connecting lug at one end of one of the two adjacent middle connecting rings is inserted into the inner hole of the other middle connecting ring, and meanwhile the middle rotating shaft hook on the middle connecting lug is hooked into the middle shaft hole of the other middle connecting ring,
[0033] Therefore, the snake bone matching product of the utility model can be matched with the medical flexible bronchoscope, ureteral nephroscope and other thin endoscopes and the finished product of the medical flexible endoscope with a diameter of less than 8 mm, wherein the front connecting ring, the middle connecting ring and the rear end ring of the snake bone are connected into one body through the structure of the corresponding rotating shaft hook and the shaft hole matching mode, which can not only ensure the quick assembly of the connecting rings of the snake bone and the stability of the connection between the connecting rings and improve the assembly efficiency, but also make the rotation between the connecting rings more flexible and accurate and reduce the production cost, and meanwhile, the connection between the adjacent connecting rings adopts the six-point positioning method, which is not only reliable and high in precision, but also more reliable in the bending angle. BRIEF DESCRIPTION OF DRAWINGS
[0034] Figure 1 is a structural schematic view of one specific embodiment of the utility model;
[0035] Figure 2 is a top view of Figure 1 ;
[0036] Figure 3 is a right view of Figure 1 ;
[0037] Figure 4 is a left view of Figure 3 ;
[0038] Figure 5 is a structural schematic view of the middle middle connecting ring of Figure 1 ;
[0039] Figure 6 is a right view of Figure 5 ;
[0040] Figure 7 is a structural schematic view of the middle rear end ring of Figure 1 ;
[0041] Figure 8 is a structural schematic view of the middle elastic fixing ring of Figure 1 . DETAILED DESCRIPTION
[0042] The utility model will be further described below in combination with the drawings and the embodiments given, but is not limited thereto.
[0043] As Figure 1 , 2 , 3, 4, 5, 6, 7, 8, a two-directional bending angle snake bone of a medical endoscope, comprising a front connecting ring 1 and a rear end ring 3, and a plurality of middle connecting rings 2 arranged between the front connecting ring 1 and the rear end ring 3,
[0044] The front connecting ring 1 is provided with two front rope holes 11 arranged symmetrically along it,
[0045] Each middle connecting ring 2 is provided with two middle rope holes 21 arranged symmetrically along it, and the middle rope holes 21 correspond to the front rope holes 11,
[0046] The end of the front connecting ring 1 is provided with front connecting ears 12 arranged symmetrically along the axial direction, and the front connecting ears 12 have rear rotating shaft hooks 13 arranged perpendicularly thereto,
[0047] The two ends of the middle connecting ring 2 are respectively provided with middle connecting ears 22 arranged symmetrically, and the middle connecting ear 22 at one end is provided with a middle shaft hole 23, and the middle connecting ear 22 at the other end is provided with a middle rotating shaft hook 24 arranged perpendicularly thereto,
[0048] The end of the rear end ring 3 is provided with rear connecting ears 32 arranged symmetrically along the axial direction, and the rear connecting ears 32 have front shaft holes 33,
[0049] The front connecting ear 12 of the front connecting ring 1 is inserted into the inner hole of the middle connecting ring 2 adjacent to it, and the rear rotating shaft hook 13 is fitted into the middle shaft hole 23 of the middle connecting ring 2 and rotates,
[0050] The middle connecting ear 22 at one end of the middle connecting ring 2 adjacent to the rear end ring 3 is inserted into the inner hole of the rear end ring 3, and the middle rotating shaft hook 24 of the middle connecting ring 2 is fitted into the front shaft hole 33 of the rear end ring 3 and rotates,
[0051] The middle connecting ear 22 at one end of one of the two adjacent middle connecting rings 2 is inserted into the inner hole of the other middle connecting ring 2, and the middle rotating shaft hook 24 on the middle connecting ear 22 is fitted into the middle shaft hole 23 of the other middle connecting ring 2.
[0052] As Figure 2 shown, in order to facilitate the cooperation and assembly of the rotating shaft hook of the snake bone with the corresponding shaft hole, the middle connecting ear 22 at one end of the middle connecting ring 2 has a semicircular through hole and a middle spring 25 formed by wire cutting, and the middle shaft hole 23 is composed of a semicircular through hole and a semicircular through hole provided on the middle spring 25,
[0053] The rear connecting lug 32 of the rear end ring 3 has a semi-circular through hole and a rear spring piece 34 formed by wire cutting. The front shaft hole 33 is formed by the semi-circular through hole and the semi-circular through hole provided on the rear spring piece 34.
[0054] Furthermore, such as Figure 2 As shown, to prevent the spring from deforming under stress on the snake-bone bend and to prevent the rotating shaft hook from moving within the shaft hole, this invention also includes several elastic fixing rings 4. An elastic fixing ring is provided on the outer periphery of the rear connecting ear 32 of the rear end ring 3, near the front shaft hole 33, to prevent the connected intermediate rotating shaft hook from moving. Similarly, an elastic fixing ring is provided on the outer periphery of the intermediate connecting ear 22 at one end of each intermediate connecting ring 2, near the intermediate shaft hole 23, to prevent the connected rear or intermediate rotating shaft hook from moving. The elastic fixing rings of this invention are pressed against the spring position, ensuring that the spring will not deform under stress on the snake-bone bend.
[0055] Furthermore, to prevent the elastic retaining ring from rotating circumferentially, such as... Figure 8 As shown, the elastic retaining ring 4 is provided with positioning grooves 41 arranged symmetrically along it for positioning the corresponding rear connecting ear or intermediate connecting ear. Furthermore, in order to ensure that the positioning grooves of the elastic retaining ring can precisely fit with the corresponding connecting ears, the width of the positioning grooves 41 of the elastic retaining ring 4 is equal to the width of the corresponding rear connecting ear or intermediate connecting ear.
[0056] Furthermore, the elastic fixing ring 4 described in this utility model is a closed-loop structure or a structure with a contraction notch. If it is a closed-loop structure, during assembly, it is pre-fitted onto the outer circumference of the connecting ring and is in an expanded state. It then moves to the outer circumference of the corresponding connecting ear and relies on its own elasticity to return to its original position around the connecting ear. If it is a structure with a contraction notch, it can be secured to the outer circumference of the corresponding connecting ear from one side of the connecting ear by utilizing the expansion of the contraction notch.
[0057] Furthermore, in order to increase the stability and strength of the position of the elastic fixing ring, the connection between the rear end ring 3 and the middle connecting ring 2 and the corresponding elastic fixing ring is also fixed by dispensing adhesive.
[0058] like Figure 4 , 6 As shown, in order to further improve the rationality of the connection, facilitate the processing of parts, and facilitate the subsequent threading of the traction rope, front rope-blocking plates are cut out on both inner walls of the front connecting ring 1 by wire cutting, and then extruded into an arc-shaped structure towards the axial direction to form the front rope threading hole 11.
[0059] The inner walls on both sides of the central connecting ring 2 are cut with wire to form a middle rope-blocking plate, which is then extruded into an arc shape towards the axis and a middle rope-passing hole 21 is constructed.
[0060] like Figure 1As shown, in order to facilitate the positioning connection between different connecting rings, and without interference, and can ensure the accuracy of the corner, the rear rotating shaft hook 13 comprises a rear rotating shaft and a rear hook, the rear rotating shaft of the rear rotating shaft hook 13 is installed in the middle shaft hole 23 of the middle connecting ring 2 adjacent thereto and is rotationally matched, and the rear hook is abutted against the end face of the corresponding middle connecting lug,
[0061] The middle rotating shaft hook 24 comprises a middle rotating shaft and a middle hook, and the middle rotating shaft of the middle connecting ring 2 adjacent to the rear end ring 3 is installed in the inner hole of the rear end ring 3 and is rotationally matched, and the middle hook of the middle connecting ring 2 is abutted against the end face of the rear connecting lug 32 of the rear end ring 3,
[0062] The middle rotating shaft of one of the two adjacent middle connecting rings is installed in the inner hole of the other middle connecting ring and is rotationally matched, and the middle hook is abutted against the end face of the middle connecting lug of the other middle connecting ring.
[0063] The snake bone of the utility model is a snake bone for two-directional corners, the rear end of the front connecting ring and one end of the middle connecting ring are both provided with a rotating shaft hook which is integrated with each other, the other end of the middle connecting ring and the front end of the rear end ring are both provided with a shaft hole which is integrated with each other, the rotating shaft hook on the front connecting ring is matched with the shaft hole of the corresponding middle connecting ring, the shaft hole on the rear end ring is matched with the rotating shaft hook of the corresponding adjacent middle connecting ring, and when the rotating shaft hook on the adjacent middle connecting ring is matched and connected with the corresponding shaft hole, the finally assembled snake bone is not only positioned well and has high precision, but also rotates flexibly, and has low production cost.
[0064] The rotating shaft hook and the corresponding shaft hole are directly inserted and assembled without gap matching, so that the positioning reference is good, and the snake bone corner is slowly rotated in the use process, so that the snake bone corner is not stressed assembled, and the rotating is flexible.
[0065] The rotating shaft hook and the shaft hole matching structure adopt six-point positioning method, so that the positioning points are more, the positioning is reliable, and the corner is also reliable.
[0066] In summary, the utility model not only has low material consumption, simple production process, reasonable structure, stable product quality, easy processing, high positioning precision of the assembled snake bone, flexible rotation, reliable corner and other advantages.
[0067] With the above ideal embodiment of the present application as the inspiration, through the above description, relevant staff can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content of the specification, and the technical scope must be determined according to the scope of claims.
Claims
1. A two-directional bending angle snake bone of a medical endoscope, comprising a front connecting ring (1) and a rear end ring (3), and a plurality of middle connecting rings (2) arranged between the front connecting ring (1) and the rear end ring (3), two front rope passing holes (11) are arranged on the front connecting ring (1) in a symmetrical manner, two middle rope passing holes (21) are arranged on each middle connecting ring (2) in a symmetrical manner, and the middle rope passing holes (21) correspond to the front rope passing holes (11), characterized in that: a front connecting lug (12) is arranged on one end of the front connecting ring (1) in a symmetrical manner along the axial direction, and the front connecting lug (12) is provided with a rear rotating shaft hook (13) arranged perpendicularly thereto, a middle connecting lug (22) is arranged on each end of the middle connecting ring (2) in a symmetrical manner, and a middle shaft hole (23) is arranged on one end of the middle connecting lug (22), and a middle rotating shaft hook (24) is arranged on the other end of the middle connecting lug (22) in a perpendicular manner, a rear connecting lug (32) is arranged on one end of the rear end ring (3) in a symmetrical manner along the axial direction, and the rear connecting lug (32) is provided with a front shaft hole (33), the front connecting lug (12) of the front connecting ring (1) is inserted into the inner hole of the adjacent middle connecting ring (2), and the rear rotating shaft hook (13) is fitted into the middle shaft hole (23) of the middle connecting ring (2) and rotates, the middle connecting lug (22) of one end of the middle connecting ring (2) adjacent to the rear end ring (3) is inserted into the inner hole of the rear end ring (3), and the middle rotating shaft hook (24) of the middle connecting ring (2) is fitted into the front shaft hole (33) of the rear end ring (3) and rotates, the middle connecting lug (22) of one end of one of the adjacent two middle connecting rings (2) is inserted into the inner hole of the other middle connecting ring (2), and the middle rotating shaft hook (24) on the middle connecting lug (22) is fitted into the middle shaft hole (23) of the other middle connecting ring (2).
2. The two-direction bending angle jont for medical endoscopes according to claim 1, characterized in that: the middle connecting lug (22) of one end of the middle connecting ring (2) is provided with a semicircular through hole and a middle elastic sheet (25) formed by wire cutting, and the middle shaft hole (23) is formed by the semicircular through hole and the semicircular through hole arranged on the middle elastic sheet (25) to form a circular shaft hole, the rear connecting lug (32) of the rear end ring (3) is provided with a semicircular through hole and a rear elastic sheet (34) formed by wire cutting, and the front shaft hole (33) is formed by the semicircular through hole and the semicircular through hole arranged on the rear elastic sheet (34) to form a circular shaft hole.
3. The two-directional bending angle jont for medical endoscopes according to claim 1 or 2, characterized in that: a plurality of elastic fixing rings (4) are further included, the rear connecting lug (32) of the rear end ring (3) is provided with an elastic fixing ring outside the periphery and close to the front shaft hole (33) to prevent the middle rotating shaft hook connected thereto from moving, and the middle connecting lug (22) of one end of each middle connecting ring (2) is provided with an elastic fixing ring outside the periphery and close to the middle shaft hole (23) to prevent the rear rotating shaft hook or the middle rotating shaft hook connected thereto from moving.
4. The two-direction bending angle jont for medical endoscopes according to claim 3, characterized in that: the elastic fixing ring (4) is provided with a positioning groove (41) arranged in a symmetrical manner and used for positioning the corresponding rear connecting lug or middle connecting lug.
5. The two-direction bending angle jont for medical endoscopes according to claim 3, characterized in that: the elastic fixing ring (4) has a closed loop structure or a structure with a contraction gap.
6. The two-direction bending angle jont for medical endoscopes according to claim 3, characterized in that: The connection between the rear end ring (3) and the middle connecting ring (2) and the corresponding elastic fixing ring is also fixed by point gluing.
7. The two-direction bending angle jont for medical endoscopes according to claim 1, characterized in that: The front rope blocking plate is cut on the inner wall of both sides of the front connecting ring (1) by wire and extruded into arc structure towards the axial direction and constructs the front rope passing hole (11), The middle rope blocking plate is cut on the inner wall of both sides of the middle connecting ring (2) by wire and extruded into arc structure towards the axial direction and constructs the middle rope passing hole (21).
8. The two-direction bending angle jont for medical endoscopes according to claim 1, characterized in that: The rear rotating shaft hook (13) comprises a rear rotating shaft and a rear hook which are connected as a whole, the rear rotating shaft of the rear rotating shaft hook (13) is installed into the middle shaft hole (23) of the middle connecting ring (2) adjacent to it and rotates in cooperation, and the rear hook abuts against the end face of the corresponding middle connecting lug, The middle rotating shaft hook (24) comprises a middle rotating shaft and a middle hook which are connected as a whole, the middle rotating shaft of the middle connecting ring (2) adjacent to the rear end ring (3) is installed into the inner hole of the rear end ring (3) and rotates in cooperation, and the middle hook abuts against the end face of the rear connecting lug (32) of the rear end ring (3), The middle rotating shaft of one of the two adjacent middle connecting rings is installed into the inner hole of the other middle connecting ring and rotates in cooperation, and the middle hook abuts against the end face of the middle connecting lug of the other middle connecting ring.
9. The two-direction bending angle jont for medical endoscopes according to claim 4, characterized in that: The width of the positioning groove (41) of the elastic fixing ring (4) is equal to the width of the corresponding rear connecting lug or middle connecting lug.