Bent snake bone of medical endoscope combined traction rope

Abstract

The utility model relates to a bent snake bone of a medical endoscope combined traction rope, which comprises a head section ring, a tail section ring and a plurality of middle section rings arranged between the head section ring and the tail section ring, and is characterized in that corresponding connecting lugs are respectively arranged at one end of the head section ring, two ends of each middle section ring and one end of the tail section ring; the connecting lug of the head section ring is provided with a corresponding rotating shaft hook, the connecting lug at one end of the middle section ring is provided with a corresponding shaft hole, the connecting lug at the other end of the middle section ring is provided with a corresponding rotating shaft hook, and the connecting lug of the tail section ring is provided with a corresponding shaft hole. The head section ring, the middle section ring and the tail section ring are connected into a whole through a corresponding rotating shaft hook and shaft hole matching structure, and meanwhile, the middle section ring and the tail section ring on the head section ring are connected in series through a traction steel wire rope. The bending device is easy to machine, the assembled snake bone can be bent in two directions through one traction steel wire rope, the bending positioning precision is high, rotation is flexible, and the bending angle is more reliable.

Description

Technical Field

[0001] This utility model relates to a snake bone device, specifically a curved snake bone for a medical endoscope traction rope, belonging to the field of medical 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 respiratory and urinary systems, as well as parts of the ear, nose, and throat. Among these, the snake-bone endoscope is a key component of both medical and industrial flexible endoscopes. The bidirectional curved snake-bone endoscope is primarily used with thinner medical endoscopes such as bronchoscopes and ureteroscopes, as well as industrial flexible endoscopes smaller than 8 mm.

[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. Regardless of whether it is a riveted or expanded serpentine structure, for serpentine structures with bends in two directions, existing technologies use two traction steel wire ropes connected in series with each section of the serpentine structure. This means that each traction steel wire rope must have a certain length before assembly, and after assembly and fixing, additional traction steel wire rope of extra length must be added. The disadvantages of this are that not only is the assembly time of the steel wire rope long, but the manual assembly is also very strenuous. At the same time, it results in high material costs for the steel wire rope and low production efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a curved snake bone for medical endoscope assembly traction rope that is not only easy to process, but also allows the assembled snake bone to bend in two directions via a single traction steel wire rope, and features high positioning accuracy and flexible rotation, making the bend angle more reliable.

[0005] To achieve the above objectives, the technical solution of this utility model is: a curved snake-like structure for a medical endoscope traction rope, comprising a head loop and a tail loop, and several intermediate loops disposed between the head loop and the tail loop.

[0006] Each intermediate section has two rope-passing holes arranged symmetrically along its pipe wall.

[0007] Its innovation lies in:

[0008] The head section ring extends symmetrically from one end along its axial direction to form a pair of front connecting ears, each front connecting ear having a rear rotating shaft hook arranged perpendicularly thereto.

[0009] The two ends of the middle section ring each extend a pair of symmetrically arranged intermediate connecting ears, with an intermediate shaft hole on one end of the intermediate connecting ear and an intermediate rotating shaft hook arranged perpendicularly thereon on the other end of the intermediate connecting ear.

[0010] The tail section ring extends axially from one end with a pair of symmetrically arranged rear connecting lugs, the rear connecting lugs having front axle holes.

[0011] The front connecting lug of the head section ring is inserted into the inner hole of the adjacent middle section ring, while the rear rotating shaft hook is inserted into the intermediate shaft hole of the middle section ring and rotates to engage.

[0012] The middle connecting lug at one end of the middle section ring adjacent to the tail section ring is inserted into the inner hole of the tail section ring, while the middle rotating shaft hook of the middle section ring is inserted into the front shaft hole of the tail section ring and rotates to engage.

[0013] The intermediate connecting lug at one end of the first intermediate ring is inserted into the inner hole of the second intermediate ring, while the intermediate rotating shaft hook on the intermediate connecting lug is inserted into the intermediate shaft hole of the second intermediate ring and rotates to engage.

[0014] It also includes a traction steel wire rope. The head section is provided with a steel wire rope positioning groove, and the steel wire rope positioning groove is provided with two front rope holes corresponding to the middle rope hole of the middle section. A section of the traction steel wire rope is embedded in the steel wire rope positioning groove, and the two ends of the traction steel wire rope pass through the corresponding front rope hole on the head section and the middle rope hole of each middle section, respectively, and exit through the tail section.

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

[0016] The rear connecting lug of the tail section ring has a semi-circular through hole and a rear spring piece formed by wire cutting. The front axle hole is a closed circular axle hole formed by the semi-circular through hole and the semi-circular through hole provided on the rear spring piece.

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

[0018] In the above technical solution, the elastic fixing ring is provided with positioning grooves that are symmetrically arranged along it and used to position 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 tail ring and the middle ring and the corresponding elastic retaining ring is also fixed by adhesive dispensing.

[0021] In the above technical solution, the inner walls on both sides of the middle section ring are wire-cut to form a middle rope-blocking plate, which is then extruded into an arc-shaped structure towards the axial direction to create a middle rope-passing hole.

[0022] 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.

[0023] In the above technical solution, the peripheral wall of the head section ring is provided with two to four conical holes for forming a mating connection with the camera mount through countersunk screws.

[0024] The positive effects of this invention are as follows: When the traction rope of the medical endoscope assembly of this invention is bent, a pair of symmetrically arranged front connecting ears extend from one end of the head segment ring along its axial direction. These front connecting ears are equipped with rear rotating shaft hooks arranged perpendicularly to them.

[0025] The two ends of the middle section ring each extend a pair of symmetrically arranged intermediate connecting ears, with an intermediate shaft hole on one end of the intermediate connecting ear and an intermediate rotating shaft hook arranged perpendicularly thereon on the other end of the intermediate connecting ear.

[0026] The tail section ring extends axially from one end with a pair of symmetrically arranged rear connecting lugs, the rear connecting lugs having front axle holes.

[0027] The front connecting lug of the head section ring is inserted into the inner hole of the adjacent middle section ring, while the rear rotating shaft hook is inserted into the intermediate shaft hole of the middle section ring and rotates to engage.

[0028] The middle connecting lug at one end of the middle section ring adjacent to the tail section ring is inserted into the inner hole of the tail section ring, while the middle rotating shaft hook of the middle section ring is inserted into the front shaft hole of the tail section ring and rotates to engage.

[0029] The intermediate connecting lug at one end of the first intermediate ring is inserted into the inner hole of the second intermediate ring, while the intermediate rotating shaft hook on the intermediate connecting lug is inserted into the intermediate shaft hole of the second intermediate ring and rotates to engage.

[0030] Therefore, this utility model's snake bone assembly is a matching product for finer endoscopes such as medical flexible bronchoscopes and ureteroscopes, as well as finished medical flexible endoscopes with a diameter of 8 mm or less. The head, middle, and tail segments of the snake bone are connected as one unit through a structure using corresponding rotating hooks and shaft holes. This structure not only ensures the rapid assembly of each connecting ring of the snake bone and the stability of the connection between each connecting ring, but also improves assembly efficiency. Furthermore, the rotation between each connecting ring is more flexible and precise, and the production cost is low. In addition, the connection between adjacent connecting rings in this utility model adopts a six-point positioning method, which is not only reliable and accurate in positioning, but also more reliable in bending angles.

[0031] Furthermore, since this utility model also includes a traction steel wire rope, the head section is provided with a steel wire rope positioning groove, and the steel wire rope positioning groove is provided with two front rope-passing holes corresponding to the middle rope-passing holes of the middle section. A portion of the traction steel wire rope is embedded in the steel wire rope positioning groove, and both ends of the traction steel wire rope pass through the corresponding front rope-passing holes on the head section and the middle rope-passing holes of each middle section, respectively, and exit through the tail section.

[0032] This invention uses a single traction steel wire rope to pass through the snake bone and achieve bending in two directions, replacing the existing technology that uses two traction steel wire ropes to achieve bending in two directions. It eliminates the need for additional process length, avoids waste of steel wire rope materials, reduces material costs, reduces assembly intensity, saves assembly time, and improves production efficiency. 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 AA sectional view;

[0036] Figure 4 yes Figure 1 Schematic diagram of the structure of the cephalic ring;

[0037] Figure 5 yes Figure 1 Schematic diagram of the structure of the middle-to-middle joint;

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

[0039] Figure 7 yes Figure 1 Schematic diagram of the midtail ring structure;

[0040] Figure 8 yes Figure 1 A schematic diagram of the structure of the elastic retaining ring. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings and the given embodiments, but it is not limited thereto.

[0042] like Figure 1 , 2 As shown in Figures 3, 4, 5, 6, 7, and 8, a curved snake-like structure for a medical endoscope traction rope includes a cephalic loop 1 and a caudal loop 3, as well as several intermediate loops 2 disposed between the cephalic loop 1 and the caudal loop 3.

[0043] Each middle section ring 2 has two central rope holes 21 arranged symmetrically along its pipe wall.

[0044] The head section ring 1 extends symmetrically from one end along its axial direction to form a pair of front connecting ears 12. Each front connecting ear 12 is provided with a rear rotating shaft hook 13 arranged perpendicularly thereto.

[0045] The two ends of the middle section ring 2 extend out a pair of symmetrically arranged intermediate connecting ears 22, and one end of the intermediate connecting ear 22 is provided with an intermediate shaft hole 23, and the other end of the intermediate connecting ear 22 is provided with an intermediate rotating shaft hook 24 arranged perpendicular to it.

[0046] The tail section ring 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 axle hole 33.

[0047] The front connecting lug 12 of the head section ring 1 is inserted into the inner hole of the adjacent middle section ring 2, while the rear rotating shaft hook 13 is inserted into the intermediate shaft hole 23 of the middle section ring 2 and rotates to engage.

[0048] The middle connecting lug 22 at one end of the middle section ring 2 adjacent to the tail section ring 3 is inserted into the inner hole of the tail section ring 3, and at the same time, the middle rotating shaft hook 24 of the middle section ring 2 is inserted into the front shaft hole 33 of the tail section ring 3 and rotates to engage.

[0049] The intermediate connecting lug 22 at one end of the first intermediate ring 2 is inserted into the inner hole of the second intermediate ring 2, and at the same time, the intermediate rotating shaft hook 24 on the intermediate connecting lug 22 is inserted into the intermediate shaft hole 23 of the second intermediate ring 3 and rotates to engage.

[0050] It also includes a traction steel wire rope 5. The head section 1 is provided with a steel wire rope positioning groove 11, and the steel wire rope positioning groove 11 is provided with two front rope holes corresponding to the middle rope hole 21 of the middle section 22. A section of the traction steel wire rope 5 is embedded in the steel wire rope positioning groove 11, and the two ends of the traction steel wire rope 5 pass through the corresponding front rope hole on the head section 1 and the middle rope hole 21 of each middle section 2, and exit through the tail section 3.

[0051] Furthermore, the wire rope positioning groove 11 is formed into an annular R-groove by using a special rotary rolling R-blade. Compared with the machining forming in the existing technology, this utility model has the advantages of low processing cost and high production efficiency.

[0052] like Figure 2 As shown, to facilitate the mating of the rotating shaft hook of the snake bone with the corresponding shaft hole and for assembly, the middle connecting lug 22 at one end of the middle segment ring 2 has a semi-circular through hole and a middle spring piece 25 formed by wire cutting. The middle shaft hole 23 is a closed circular shaft hole formed by the mating of the semi-circular through hole and the semi-circular through hole on the middle spring piece 25.

[0053] The rear connecting lug 32 of the tail section ring 3 has a semi-circular through hole and a rear spring piece 34 formed by wire cutting. The front axle hole 33 is a closed circular axle hole 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 1 As shown, to prevent the spring from deforming under bending stress and to prevent the rotating shaft hook from moving within the shaft hole, several elastic retaining rings 4 are also included. An elastic retaining ring is provided on the outer periphery of the rear connecting lug 32 of the tail section ring 3, near the front shaft hole 33, to prevent the intermediate rotating shaft hook connected to it from moving. Similarly, an elastic retaining ring is provided on the outer periphery of the intermediate connecting lug 22 at one end of each middle section ring 2, near the intermediate shaft hole 23, to prevent the rear or intermediate rotating shaft hook connected to it from moving. After the different sections are assembled, the elastic retaining rings described in this invention are pressed onto the spring position. Thus, when the snake-bone bend is subjected to stress, the spring will not deform.

[0055] Furthermore, to prevent the elastic retaining ring from rotating circumferentially, such as... Figure 8 As shown, the elastic fixing ring 4 is provided with positioning grooves 41 arranged symmetrically along it and used to position the corresponding rear connecting ear or intermediate connecting ear.

[0056] Furthermore, in order to ensure that the positioning groove of the elastic fixing ring can accurately fit 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 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 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 engaged from the connecting ear side by expanding and locking onto the outer circumference of the corresponding connecting ear using the contraction notch.

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

[0059] like Figure 6 As shown, in order to further improve the rationality of the combination, facilitate the processing of parts, and facilitate the subsequent threading of the traction rope, the inner walls on both sides of the middle section ring 2 are wire-cut into middle rope-blocking plates, which are then extruded into an arc-shaped structure towards the axial direction to form a middle rope-threading hole 21.

[0060] Furthermore, such as Figure 1 , 4 As shown, in order to form a high-precision connection with the camera mount and replace the adhesive bonding method of the existing technology, the peripheral wall of the head section ring 1 is provided with two to four conical holes 14 for forming a mating connection with the camera mount through countersunk screws.

[0061] The present invention has a rotating shaft hook integrated with each other at the rear end of the head ring and one end of the middle ring, and a shaft hole integrated with each other at the other end of the middle ring and the front end of the tail ring. When the rotating shaft hook on the head ring engages with the shaft hole of the corresponding middle ring, and the shaft hole on the tail ring engages with the rotating shaft hook of the adjacent middle ring, and the rotating shaft hook on the adjacent middle ring engages with the corresponding shaft hole, the snake bone after final assembly is not only well positioned and highly accurate, but also rotates flexibly and has low production cost.

[0062] 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.

[0063] 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.

[0064] This invention uses a single traction steel wire rope to pass through the snake bone and achieve bending in two directions, replacing the existing technology that uses two traction steel wire ropes to achieve bending in two directions. It eliminates the need for additional process length, avoids waste of steel wire rope materials, reduces material costs, reduces assembly intensity, saves assembly time, and improves production efficiency.

[0065] In summary, this utility model not only has low material consumption and simple production process, but also reasonable structure and stable product quality. In addition, it is easy to process, the assembled snake bone can be bent in two directions by a single traction steel wire rope, and the bending positioning accuracy is high and the rotation is flexible, making the bend more reliable.

[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 medical endoscope combined traction rope bending snake, comprising a head ring (1) and a tail ring (3), and a plurality of middle rings (2) arranged between the head ring (1) and the tail ring (3), Each middle ring (2) is provided with two middle rope passing holes (21) arranged symmetrically on the tube wall thereof, characterized in that: The end of the head ring (1) extends a pair of symmetrically arranged front connecting ears (12) in the axial direction thereof, and the front connecting ears (12) are provided with rear rotating shaft hooks (13) arranged perpendicularly thereto, The two ends of the middle ring (2) extend a pair of symmetrically arranged middle connecting ears (22) respectively, 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, The end of the tail ring (3) extends a pair of symmetrically arranged rear connecting ears (32) in the axial direction thereof, and the rear connecting ears (32) have front shaft holes (33), The front connecting ears (12) of the head ring (1) are inserted into the inner holes of the middle ring (2) adjacent thereto, and the rear rotating shaft hooks (13) are fitted into and rotate with the middle shaft holes (23) of the middle ring (2), The middle connecting ear (22) at one end of the middle ring (2) adjacent to the tail ring (3) is inserted into the inner hole of the tail ring (3), and the middle rotating shaft hook (24) of the middle ring (2) is fitted into and rotates with the front shaft hole (33) of the tail ring (3), The middle connecting ear (22) at one end of the front middle ring (2) among two adjacent middle rings is inserted into the inner hole of the rear middle ring (2), and the middle rotating shaft hook (24) on the middle connecting ear (22) is fitted into and rotates with the middle shaft hole (23) of the rear middle ring (2), Further comprising a traction steel wire rope (5), the head ring (1) is provided with a steel wire rope positioning groove (11), and the steel wire rope positioning groove (11) is provided with two front rope passing holes corresponding to the middle rope passing holes (21) of the middle ring (2), and a part of the traction steel wire rope (5) is embedded into the steel wire rope positioning groove (11), and the two ends of the traction steel wire rope (5) pass through the corresponding front rope passing holes of the head ring (1) and the middle rope passing holes (21) of each middle ring (2) respectively and pass out of the tail ring (3).

2. The medical endoscope combination pull wire flexure serpentine of claim 1, wherein: The middle connecting ear (22) at one end of the middle ring (2) has a semicircular through hole and a middle spring (25) formed by wire cutting, and the middle shaft hole (23) is a closed circular shaft hole composed of the semicircular through hole and the semicircular through hole provided on the middle spring (25), The rear connecting ear (32) of the tail ring (3) has a semicircular through hole and a rear spring (34) formed by wire cutting, and the front shaft hole (33) is a closed circular shaft hole composed of the semicircular through hole and the semicircular through hole provided on the rear spring (34).

3. The curved serpentine of claim 1 or 2, wherein: Also included are several elastic fixing rings (4), the rear connecting lug (32) of the tail segment ring (3) is provided with an elastic fixing ring at the outer periphery and close to the front shaft hole (33) to prevent the elastic fixing ring connected thereto from moving, and the intermediate connecting lug (22) of each middle segment ring (2) is provided with an elastic fixing ring at the outer periphery and close to the intermediate shaft hole (23) to prevent the elastic fixing ring connected thereto from moving.

4. The curved serpentine of claim 3, wherein: The elastic fixing ring (4) is provided with a positioning groove (41) arranged symmetrically along the elastic fixing ring (4) and used for positioning the corresponding rear connecting lug or intermediate connecting lug.

5. The curved serpentine of claim 3, wherein: The elastic fixing ring (4) is a closed loop structure or a structure with a contraction gap.

6. The curved serpentine bone of the medical endoscope combined pull- rope according to claim 3, characterized in that: The connection between the tail segment ring (3) and the middle segment ring (2) and the corresponding elastic fixing ring is also fixed by point gluing.

7. The medical endoscope combination pull-wire flexure serpentine of claim 1, wherein: The intermediate blocking rope plate is cut out on the two side inner walls of the middle segment ring (2) by wire cutting, is extruded into an arc structure towards the shaft center direction, and constructs the intermediate rope passing hole (21).

8. The curved serpentine bone of the medical endoscope combined pull- rope 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 intermediate connecting lug.

9. The medical endoscope combination pull-wire flexure serpentine of claim 1, wherein: The circumferential wall of the head segment ring (1) is provided with two to four taper holes (14) used for forming a matched connection with the camera seat through a counterbore screw.

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