Four-direction bent snake bone of medical endoscope

Abstract

The utility model relates to a four-direction bending snake bone of a medical endoscope, which comprises a front section tube, a rear section tube and a plurality of middle section tubes arranged between the front section tube and the rear section tube, four evenly arranged front rope penetrating holes are arranged on the peripheral wall of the front section tube along the peripheral direction, and four evenly arranged rear rope penetrating holes are arranged on the peripheral wall of the rear section tube along the peripheral direction. Four middle rope penetrating holes which are uniformly distributed are formed in the circumferential wall of each middle section pipe in the circumferential direction of the middle section pipe, and the middle rope penetrating holes correspond to the front rope penetrating holes in a one-to-one mode. The front shaft hole of the rear section pipe is connected with the corresponding middle rotating shaft hook on the adjacent middle section pipe, and the rear middle section pipe in the adjacent middle section pipes is connected with the middle shaft hole in a matched mode through the corresponding middle rotating shaft hook after rotating by 90 degrees. According to the utility model, the processing is easy, the positioning precision of the assembled snake bone is high, the rotation is flexible, and the bending angle is reliable.

Description

Technical Field

[0001] This utility model relates to a snake bone, specifically a four-directional curved snake bone for a medical endoscope, belonging to the field of endoscope technology. Background Technology

[0002] Currently, domestic and international flexible medical endoscopes are mainly used for the examination, diagnosis, and minimally invasive treatment of the cavities of the human digestive, respiratory, and urinary systems, as well as parts of the ear, nose, and throat. Snake-shaped skeletons are also a key component of both medical and industrial flexible endoscopes. Four-way curved snake-shaped skeletons are primarily used with larger medical endoscopes such as gastrointestinal endoscopes.

[0003] Existing snake-shaped endoscopes include riveted and expanded joint structures. Riveted structures are prone to problems during riveting due to improper adjustment of the stamping machine and incorrect installation of the riveting die, leading to bending and deformation of the rivet shaft, resulting in inflexible rotation and low yield. Additionally, rivet heads may be too small, causing them to fall off. Furthermore, the curved portion of the endoscope can easily cause malfunctions or render the endoscope unusable. Expanded joint structures connect the segments using a connection structure consisting of a boss and its groove, or a ball-and-socket joint. However, since there are only three positioning points after the boss and groove contact, the bend angle of the snake-shaped endoscope may shift, resulting in poor accuracy. While the ball-and-socket joint structure ensures flexible rotation between segments, it has a larger friction area, and its five-point positioning also results in relatively lower positioning accuracy. At the same time, regardless of whether it is a riveted snake bone or an expanded snake bone, the front segment ring of the snake bone and the camera mount are fixedly connected by glue. Specifically, the camera mount is inserted into the inner hole of the front segment ring and fixed with glue. This structure will have certain deviations in the positioning accuracy and positioning reference of the connection between the camera mount and the front segment ring, resulting in reduced reliability. Summary of the Invention

[0004] The purpose of this invention is to provide a four-directional bending snake bone for a medical endoscope that is not only easy to process, but also has a good connection and positioning reference between the assembled snake bone and the camera mount, as well as high positioning accuracy, flexible rotation, and more reliable bending angles.

[0005] To achieve the above objectives, the technical solution of this utility model is: a four-directional curved serpentine structure for a medical endoscope, comprising an anterior segment tube and a posterior segment tube, and several intermediate segment tubes disposed between the anterior and posterior segment tubes.

[0006] The front section tube has four evenly arranged front rope holes on its circumferential wall.

[0007] Each middle section of the tube has four evenly arranged intermediate rope holes on its circumferential wall, with each intermediate rope hole corresponding to a front rope hole.

[0008] Its innovation lies in:

[0009] The front section tube extends symmetrically from one end along its axial direction to form a pair of front connecting ears. Each front connecting ear has a rear rotating shaft hook arranged perpendicularly thereto. The front section tube also has a tapered hole for connecting to a camera mount via a countersunk screw.

[0010] The middle section tube extends from each end with a pair of symmetrically arranged intermediate connecting ears. The intermediate connecting ears at both ends of the middle section tube have a 90° phase difference, and one intermediate connecting ear is provided with an intermediate shaft hole, while the other intermediate connecting ear is provided with an intermediate rotating shaft hook arranged perpendicular to it.

[0011] The rear section tube extends axially from one end with a pair of symmetrically arranged rear connecting ears, the rear connecting ears having a front shaft hole.

[0012] The front connecting lug of the front section tube is inserted into the inner hole of the adjacent middle section tube, while the rear rotating shaft hook is inserted into the middle shaft hole of the middle section tube and rotates to engage.

[0013] The middle connecting lug at one end of the middle section tube adjacent to the rear section tube is inserted into the inner hole of the rear section tube, while the middle rotating shaft hook of the middle section tube is installed into the front shaft hole of the rear section tube and rotates to engage.

[0014] After the latter middle section tube of two adjacent middle sections is rotated 90°, it is connected to the former middle section tube. At the same time, the middle connecting lug at one end of the former middle section tube is inserted into the inner hole of the latter middle section tube, and the middle rotating shaft hook on the middle connecting lug is installed into the middle shaft hole of the latter middle section tube.

[0015] In the above technical solution, the middle connecting lug at one end of the middle section tube has a semi-circular through hole and a middle spring piece formed by wire cutting. The free end of the middle spring piece has a semi-circular through hole formed by cutting. The middle shaft hole is formed by the semi-circular through hole and the semi-circular through hole on the middle spring piece fitting together to form a closed circular shaft hole.

[0016] The rear connecting lug of the rear section tube has a semi-circular through hole and a rear spring sheet formed by wire cutting. The free end of the rear spring sheet has a semi-circular through hole formed by cutting. The front shaft hole is formed by the semi-circular through hole and the semi-circular through hole on the rear spring sheet.

[0017] The above technical solution also includes several elastic fixing rings. The rear connecting ear of the rear section tube is provided with an elastic fixing ring on its outer periphery and near the front shaft hole to prevent the intermediate rotating shaft hook connected to it from moving. The middle connecting ear at one end of each middle section tube is provided with an elastic fixing ring on its outer periphery and near the intermediate shaft hole to prevent the rear rotating shaft hook or intermediate rotating shaft hook connected to it from moving.

[0018] In the above technical solution, the elastic fixing ring is provided with positioning grooves that are symmetrically arranged along it and form a snap-fit ​​with the corresponding rear connecting ear or intermediate connecting ear.

[0019] In the above technical solution, the elastic fixing ring is a closed-loop structure or a structure with a contraction notch.

[0020] In the above technical solution, the connection between the rear section tube and the middle section tube and the corresponding elastic fixing ring is also fixed by adhesive dispensing.

[0021] In the above technical solution, a front rope-blocking plate is formed on the peripheral wall of the front section tube by wire cutting, and then extruded into an arc-shaped structure towards the axial direction to construct a front rope-passing hole.

[0022] The middle section tube has a central rope-blocking plate cut out by wire cutting on its peripheral wall, and is then extruded into an arc shape towards the axis to create a central rope-passing hole.

[0023] In the above technical solution, two to four conical holes are evenly arranged on the front section tube along its circumference.

[0024] In the above technical solution, the width of the positioning groove of the elastic fixing ring is equal to the width of the corresponding rear connecting ear or intermediate connecting ear.

[0025] The positive effects of this invention are as follows: When the medical endoscope of this invention is used with a four-directional curved serpentine structure, a pair of symmetrically arranged anterior connecting ears extend from one end of the anterior segment tube along its axial direction. These anterior connecting ears have a rear rotating shaft hook arranged perpendicularly to them.

[0026] The middle section tube extends from each end with a pair of symmetrically arranged intermediate connecting ears. The intermediate connecting ears at both ends of the middle section tube have a 90° phase difference, and one intermediate connecting ear is provided with an intermediate shaft hole, while the other intermediate connecting ear is provided with an intermediate rotating shaft hook arranged perpendicular to it.

[0027] The rear section tube extends axially from one end with a pair of symmetrically arranged rear connecting ears, the rear connecting ears having a front shaft hole.

[0028] The front connecting lug of the front section tube is inserted into the inner hole of the adjacent middle section tube, while the rear rotating shaft hook is inserted into the middle shaft hole of the middle section tube and rotates to engage.

[0029] The middle connecting lug at one end of the middle section tube adjacent to the rear section tube is inserted into the inner hole of the rear section tube, while the middle rotating shaft hook of the middle section tube is installed into the front shaft hole of the rear section tube and rotates to engage.

[0030] After the latter of two adjacent middle sections is rotated 90°, it connects with the former. At the same time, the middle connecting lug at one end of the former middle section is inserted into the inner hole of the latter middle section, and the middle rotating shaft hook on the middle connecting lug is inserted into the middle shaft hole of the latter middle section.

[0031] Furthermore, since the front section tube is also provided with a tapered hole for connecting to the camera mount via a countersunk screw, when the front section tube is connected to the camera mount, the countersunk screw can be used to achieve a quick positioning connection between the front section tube and the camera mount. This not only ensures the positioning accuracy and positioning reference between the front section tube and the camera mount, but also improves the reliability of the connection.

[0032] In summary, the front, middle, and rear sections of this utility model are connected as one unit through a structure using corresponding rotating shaft hooks and shaft holes. This structure not only ensures the rapid assembly of each section of the snake-like tube and the stability of the connection between each section, as well as improving assembly efficiency, but also allows for more flexible and precise rotation between the sections, resulting in lower production costs. Furthermore, the connection between adjacent sections in this utility model uses a six-point positioning method, which not only ensures reliable and high-precision positioning but also makes the bends more reliable. Attached Figure Description

[0033] Figure 1 This is a structural schematic diagram of one specific embodiment of the present invention;

[0034] Figure 2 yes Figure 1 A top-down view;

[0035] Figure 3 yes Figure 1 Schematic diagram of the structure of the front section of the tube;

[0036] Figure 4 yes Figure 3 A left-view diagram;

[0037] Figure 5 yes Figure 1 Schematic diagram of the structure of the middle section pipe;

[0038] Figure 6 yes Figure 5 A left-view diagram;

[0039] Figure 7 yes Figure 5 A top-down view;

[0040] Figure 8 yes Figure 1 Schematic diagram of the middle and rear sections of the tube;

[0041] Figure 9 yes Figure 1 A schematic diagram of the structure of the elastic retaining ring. Detailed Implementation

[0042] The present invention will be further described below with reference to the accompanying drawings and the given embodiments, but it is not limited thereto.

[0043] like Figure 1 , 2 As shown in Figures 3, 4, 5, 6, 7, 8, and 9, a four-way curved serpentine structure for a medical endoscope includes an anterior segment tube 1 and a posterior segment tube 3, as well as several intermediate segment tubes 2 disposed between the anterior segment tube 1 and the posterior segment tube 3.

[0044] The front section tube 1 has four evenly arranged front rope holes 11 on its peripheral wall along its circumference.

[0045] Each middle section tube 2 has four evenly arranged intermediate rope holes 21 on its circumferential wall, and the intermediate rope holes 21 correspond one-to-one with the front rope holes 11.

[0046] The front section tube 1 extends a pair of symmetrically arranged front connecting ears 12 from one end along its axial direction. Each front connecting ear 12 has a rear rotating shaft hook 13 arranged perpendicularly thereto. The front section tube 1 is also provided with a tapered hole 14 for connecting to a camera mount via a countersunk screw.

[0047] The two ends of the middle section tube 2 extend out a pair of symmetrically arranged intermediate connecting ears 22. The intermediate connecting ears 22 at both ends of the middle section tube 2 have a 90° phase difference, and one intermediate connecting ear 22 is provided with an intermediate shaft hole 23, while the other intermediate connecting ear 22 is provided with an intermediate rotating shaft hook 24 arranged perpendicular to it.

[0048] The rear section tube 3 extends symmetrically from one end along its axial direction into a pair of rear connecting ears 32, each rear connecting ear having a front shaft hole 33.

[0049] The front connecting lug 12 of the front section tube 1 is inserted into the inner hole of the adjacent middle section tube 2, while the rear rotating shaft hook 13 is inserted into the intermediate shaft hole 23 of the middle section tube 2 and rotates to engage.

[0050] The middle connecting lug 22 at one end of the middle section tube 2 adjacent to the rear section tube 3 is inserted into the inner hole of the rear section tube 3, and at the same time, the middle rotating shaft hook 24 of the middle section tube 2 is installed into the front shaft hole 33 of the rear section tube 3 and rotates to engage.

[0051] After the latter middle section tube of two adjacent middle sections is rotated 90°, it is connected to the former middle section tube. At the same time, the middle connecting lug 22 at one end of the former middle section tube 2 is inserted into the inner hole of the latter middle section tube 2, and the middle rotating shaft hook 24 on the middle connecting lug 22 is installed into the middle shaft hole 23 of the latter middle section tube 2.

[0052] Furthermore, such as Figure 1 , 2 As shown in Figures 7 and 8, to facilitate the mating, assembly, and connection of the rotating shaft hooks on different segments of the snake bone with their corresponding shaft holes, the middle connecting lug 22 at one end of the middle segment 2 has a semi-circular through hole and a wire-cut intermediate spring piece 25. The free end of the intermediate spring piece 25 has a cut semi-circular through hole. The intermediate shaft hole 23 is formed by the mating of the semi-circular through hole and the semi-circular through hole on the intermediate spring piece 25 to create a closed circular shaft hole.

[0053] The rear connecting lug 32 of the rear section tube 3 has a semi-circular through hole and a spring piece 34 formed by wire cutting. The free end of the rear spring piece 34 has a semi-circular through hole formed by cutting. The front shaft hole 33 is formed by the semi-circular through hole and the semi-circular through hole on the rear spring piece 34. The front shaft hole 33 is formed by the semi-circular through hole and the semi-circular through hole on the rear spring piece 34.

[0054] Furthermore, such as Figure 1 As shown, to prevent deformation of the spring sheet when the snake bone is subjected to force at a bend, and to prevent the rotating shaft hook from shifting 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 section tube 3, near the front shaft hole 33, to prevent shifting of the connected intermediate rotating shaft hook. Similarly, an elastic fixing ring is provided on the outer periphery of the intermediate connecting ear 22 at one end of each middle section tube 2, near the intermediate shaft hole 23, to prevent shifting of the connected rear or intermediate rotating shaft hook. The elastic fixing rings of this invention are pressed against the spring sheet, ensuring that the spring sheet will not deform when the snake bone is subjected to force at a bend.

[0055] Furthermore, such as Figure 9 As shown, in order to prevent the elastic fixing ring from rotating circumferentially, the elastic fixing ring 4 is provided with positioning grooves 41 that are symmetrically arranged along it and form a snap-fit ​​with the corresponding rear connecting ear or middle connecting ear.

[0056] Furthermore, in order to ensure that the elastic fixing ring can be accurately positioned with the corresponding connecting ear, the width of the positioning groove 41 of the elastic fixing ring 4 is equal to the width of the corresponding rear connecting ear or middle connecting ear.

[0057] Furthermore, the elastic fixing ring 4 described in this utility model is a closed-loop structure or a structure with a contraction notch. If the elastic fixing ring 4 is a closed-loop structure, during assembly, it is pre-fitted onto the outer circumference of the corresponding segment tube using its own elasticity and is in an expanded state. After the different segments tubes are connected as one unit, the elastic fixing ring is moved to the outer circumference of the corresponding connecting ear and then resets itself by its own elasticity to clamp onto the outer circumference of the connecting ear. If it is a structure with a contraction notch, it can be engaged onto the outer circumference of the corresponding connecting ear from one side of the connecting ear by expanding the contraction notch.

[0058] Furthermore, in order to increase the stability and strength of the elastic retaining ring position, the connection between the rear section tube 3 and the middle section tube 2 and the corresponding elastic retaining ring is also fixed by adhesive dispensing.

[0059] 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, a front rope baffle is formed on the peripheral wall of the front section tube 1 by wire cutting, and then extruded into an arc-shaped structure towards the axial direction to construct the front rope threading hole 11.

[0060] The middle section tube 2 has a middle rope-blocking plate cut out by wire cutting on its peripheral wall, and is extruded into an arc-shaped structure towards the axis to form a middle rope-passing hole 21.

[0061] Furthermore, in order to further improve the positioning accuracy of the connection between the front section tube and the camera mount, and to ensure the firmness and reliability of the connection between the two, two to four conical holes 14 are evenly arranged on the front section tube 1 along its circumference.

[0062] This utility model snake bone is a snake bone that can bend in four directions: up, down, left, and right. At the same time, the front section tube, middle section tube, and rear section tube are connected by corresponding rotating shaft hooks and shaft holes. The assembled snake bone is not only well positioned and highly accurate, but also flexible in rotation and has low production cost.

[0063] The rotating shaft hook of this invention is directly inserted into the corresponding shaft hole in the assembly structure with no clearance, which makes the positioning reference good. At the same time, it is also a stress-free assembly. The snake bone bend rotates slowly during use, which is also a stress-free assembly, so it rotates flexibly. Unlike the riveted snake bone in the prior art, which would cause the snake bone bend to have great rotation resistance when riveted tightly.

[0064] The rotating shaft hook and shaft hole mating structure of this utility model adopts a six-point positioning method, which not only has multiple positioning points, making the positioning reliable, but also makes the bends reliable.

[0065] In summary, this utility model not only has low material consumption and simple production process, but also has a reasonable structure and stable product quality. In addition, it is easy to process, and the assembled snake bone has high positioning accuracy, flexible rotation, and reliable bending angles.

[0066] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A four-direction bending snake of a medical endoscope, comprising a front section tube (1) and a rear section tube (3), and a plurality of middle section tubes (2) arranged between the front section tube (1) and the rear section tube (3), four front rope passing holes (11) are arranged on the peripheral wall of the front section tube (1) and along the circumferential direction of the peripheral wall, four middle rope passing holes (21) are arranged on the peripheral wall of each middle section tube (2) and along the circumferential direction of the peripheral wall, and the middle rope passing holes (21) correspond to the front rope passing holes (11) one by one, characterized in that: a pair of symmetrically arranged front connecting ears (12) are arranged on the end of the front section tube (1) and extend along the axial direction of the front section tube (1), the front connecting ears (12) are provided with rear rotating shaft hooks (13) arranged perpendicularly to the front connecting ears (12), and the front section tube (1) is further provided with a tapered hole (14) for connecting a camera seat through a countersunk screw, a pair of symmetrically arranged middle connecting ears (22) are arranged on both ends of the middle section tube (2), the middle connecting ears (22) on both ends of the middle section tube (2) have a 90° phase difference, one of the middle connecting ears (22) is provided with a middle shaft hole (23), and the other middle connecting ear (22) is provided with a middle rotating shaft hook (24) arranged perpendicularly to the middle connecting ear (22), a pair of symmetrically arranged rear connecting ears (32) are arranged on the end of the rear section tube (3) and extend along the axial direction of the rear section tube (3), and the rear connecting ears (32) are provided with front shaft holes (33), the front connecting ears (12) of the front section tube (1) are inserted into the inner hole of the middle section tube (2) adjacent to the front connecting ears (12), and the rear rotating shaft hooks (13) are fitted into the middle shaft holes (23) of the middle section tube (2) and are rotationally connected, the middle connecting ears (22) on one end of the middle section tube (2) adjacent to the rear section tube (3) are inserted into the inner hole of the rear section tube (3), and the middle rotating shaft hooks (24) of the middle section tube (2) are fitted into the front shaft holes (33) of the rear section tube (3) and are rotationally connected, the rear middle section tube of the two adjacent middle section tubes is rotationally connected with the front middle section tube after being rotated by 90°, and the middle connecting ears (22) on one end of the front middle section tube (2) are inserted into the inner hole of the rear middle section tube (2), and the middle rotating shaft hooks (24) on the middle connecting ears (22) are fitted into the middle shaft holes (23) of the rear middle section tube (2).

2. The four-direction bending serpentine of a medical endoscope according to claim 1, characterized by: the middle connecting ears (22) on one end of the middle section tube (2) are provided with semicircular through holes and middle elastic sheets (25) formed by wire cutting, the free end of the middle elastic sheet (25) is provided with a semicircular through hole formed by wire cutting, and the middle shaft hole (23) is formed by the semicircular through hole and the semicircular through hole on the middle elastic sheet (25) and is a closed circular shaft hole, the rear connecting ears (32) of the rear section tube (3) are provided with semicircular through holes and rear elastic sheets (34) formed by wire cutting, the free end of the rear elastic sheet (34) is provided with a semicircular through hole formed by wire cutting, and the front shaft hole (33) is formed by the semicircular through hole and the semicircular through hole on the rear elastic sheet (34) and is a closed circular shaft hole.

3. The four-direction bending serpentine of a medical endoscope according to claim 1 or 2, characterized in that: Also included are several elastic fixing rings (4), the rear connecting lug (32) of the rear segment pipe (3) is provided with an elastic fixing ring at the outer periphery and close to the front shaft hole (33) to prevent the intermediate rotating shaft hook connected thereto from moving, and the intermediate connecting lug (22) of each middle segment pipe (2) is provided with an elastic fixing ring at the outer periphery and close to the intermediate shaft hole (23) to prevent the rear rotating shaft hook or the intermediate rotating shaft hook connected thereto from moving.

4. The four-direction bending serpentine of a medical endoscope according to claim 3, characterized by: The elastic fixing ring (4) is provided with a positioning groove (41) arranged symmetrically along the same and clamped with the corresponding rear connecting lug or intermediate connecting lug.

5. The four-direction bending serpentine of a medical endoscope according to claim 3, characterized by: The elastic fixing ring (4) is a closed loop structure or a structure with a contraction gap.

6. The four-direction bending serpentine of a medical endoscope according to claim 3, characterized by: The connection between the rear segment pipe (3) and the middle segment pipe (2) and the corresponding elastic fixing ring is also fixed by point gluing.

7. The four-direction bending serpentine of a medical endoscope according to claim 1, wherein: The peripheral wall of the front segment pipe (1) is formed with a front rope blocking plate by wire cutting, and is extruded into an arc structure towards the axial direction and constructs a front rope passing hole (11), The peripheral wall of the middle segment pipe (2) is formed with a middle rope blocking plate by wire cutting, and is extruded into an arc structure towards the axial direction and constructs a middle rope passing hole (21).

8. The four-direction bending serpentine of a medical endoscope according to claim 1, wherein: The front segment pipe (1) is uniformly provided with two to four taper holes (14) along the circumferential direction thereof.

9. The four-direction bending serpentine of a medical endoscope according to claim 4, wherein: 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 intermediate connecting lug.

Images