A method for assembling a disposable medical endoscope snake bone
By using hard plastic or powder metallurgical materials to make snake bone rings and assemble them using central wire rope components, the disinfection and maintenance problems caused by reuse of medical endoscopes are solved, and low-cost and efficient disposable snake bone production is achieved. , avoid cross-infection and environmental pollution.
Patent Information
- Application Number
- CN202111577337.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-12-22
- Publication Date
- 2024-12-06
- Estimated Expiration
- 2041-12-22
AI Technical Summary
Due to the need for reuse of existing medical endoscopes, the disinfection cost is high and the maintenance cost is high. Cross-infection cannot be completely avoided. The production process of disposable snake bones is cumbersome and costly, which cannot meet the needs of ordinary people.
Snake bone rings are made of hard plastic or powder metallurgical materials, and assembled through central wire rope components to simplify the process flow, reduce production costs, and are suitable for mass production.
It realizes low-cost and efficient production of snake bones, avoids the risk of cross-infection caused by reuse, and is suitable for disposable medical endoscopes, reduces production and use costs, and can use environmentally friendly materials to reduce environmental pollution.
Smart Images
Figure CN114343545B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a snake bone assembly method, in particular to an assembly method of a disposable medical endoscope snake bone, and belongs to the technical field of medical devices. Background Art
[0002] Over the years, medical flexible endoscopes have been widely used for examination or surgery at home and abroad, and are inserted into the human digestive system (endoscopes with thicker insertion parts, including disposable esophagoscopes, gastroscopes, duodenoscopes, colonoscopes, etc. with four-way bending angles), respiratory system (endoscopes with thinner insertion parts, including bronchoscopes, nasopharyngeal endoscopes, etc. with two-way bending angles), and urinary system (thin endoscopes, ureteronephroscopes, cystoscopes, etc. with two-way bending angles) for diagnosis or surgery of the human body cavity. It is an irreplaceable diagnostic and treatment technology in modern medical clinical practice.
[0003] 1) Medical endoscopes need to be reused. To avoid cross infection between patients, endoscopes cannot be 100% cleaned and disinfected after use by related patients, even after strict and complex disinfection procedures. Moreover, the cost of cleaning and disinfection is very high. According to the relevant disinfection technical operation specifications issued by the Ministry of Health, an endoscope needs to go through 6 to 10 steps of cleaning and disinfection after use, which takes at least 20 minutes.
[0004] 2) Reusable endoscopes not only have high costs for cleaning and disinfection, but also high costs for maintenance or repair. In addition, medical endoscopes are also expensive, with the price of a set being around RMB 300,000.
[0005] 3) In order to avoid cross infection, reduce the high cost of disinfection, maintenance and storage, a disposable endoscope must be designed and developed as soon as possible. The disposable endoscope is composed of a disposable bending part snake bone, a disposable insertion tube, a disposable camera and lighting and other main components. The existing disposable medical endoscopes, i.e. disposable snake bones, have been designed, developed, produced and used clinically in some developed countries for many years. However, the price of imported products from abroad is still very expensive compared to that of domestic people, which makes the burden very heavy and cannot meet the use needs of ordinary people.
[0006] 4) Most of the snake bones in the prior art are riveted structures. The processing of a single snake bone connecting ring is to use a stainless steel pipe for wire cutting, and fix it on a special tooling, and rotate it 90 degrees for multiple times to wire cut a single part of the snake bone connecting ring. The connecting ears of the snake bone connecting ring are flattened (design a shaping mold), and then a rivet hole is punched out in the middle of the connecting ear (design a punching mold), and finally the adjacent snake bone connecting rings are riveted together by a riveting tooling fixture to connect the snake bone products. Not only is the production process complicated and has many steps, but also there are many processing cycles and low production efficiency. At the same time, the production cost of the snake bones in the prior art is also very high, and it is not suitable for disposable use. Summary of the invention
[0007] The purpose of the present invention is to provide an assembly method for a disposable medical endoscope snake bone which is not only simple in assembly process but also short in processing cycle and suitable for mass production. At the same time, the situation in which cross infection of patients occurs due to insufficient disinfection due to the need for repeated use will no longer occur, making it suitable for assembling a disposable medical endoscope snake bone for disposable use.
[0008] In order to achieve the above object, the technical solution of the present invention is: a method for assembling a disposable medical endoscope snake bone, the snake bone includes a head end ring, a hose ring and a plurality of angle rings arranged between the head end ring and the hose ring, and its innovation lies in: it also includes a central wire rope assembly, the central wire rope assembly includes a central wire rope and a wire rope fixing ring, and the specific assembly steps are:
[0009] 1. Select materials:
[0010] a. The head end ring, hose ring and several angle rings are all made of hard plastic or powder metallurgy and are ready for use;
[0011] b. The central steel wire rope is directly cut from a section of stainless steel wire rope, and its diameter and length are required by the product design. The steel wire rope fixing ring is made of stainless steel tube or brass tube.
[0012] 2. Processing method of head end ring:
[0013] If the head end connection ring is processed by hard plastic, the hard plastic is injected into the injection mold of the injection molding machine for integrated processing and molding; if the head end connection ring is processed by powder metallurgy, the powder metallurgy is injected into the injection mold of the injection molding machine for integrated processing and molding, and the finished head end connection ring is directly obtained, that is, one end of the head end connection ring is provided with symmetrically arranged rear rotating bodies along its axial direction, and the head end connection ring also has a front rope threading hole, and the inner cavity of the head end connection ring has a reinforcing rib with a center hole;
[0014] 3. Processing method of angle connection ring:
[0015] If the angle connection ring is processed by hard plastic, the hard plastic is injected into the injection mold of the injection molding machine for integrated processing and forming; if the angle connection ring is processed by powder metallurgy, the powder metallurgy is injected into the injection mold of the injection molding machine for integrated processing and forming, and the finished angle connection ring is directly obtained, that is, the two ends of the angle connection ring are respectively provided with symmetrically arranged intermediate rotating bodies and intermediate rotating grooves along the axial direction thereof, and the angle connection ring also has an intermediate rope threading hole, and the inner cavity of the angle connection ring has a reinforcing rib with a center hole;
[0016] 4. Processing method of hose connector:
[0017] If the hose connector is made of hard plastic, the hard plastic is injected into the injection mold of the injection molding machine for integrated processing and forming; if the hose connector is made of powder metallurgy, the powder metallurgy is injected into the injection mold of the injection molding machine for integrated processing and forming, and the finished hose connector is directly obtained, that is, one end of the hose connector is provided with symmetrically arranged front rotation grooves along its axial direction, and the hose connector also has a rear rope threading hole, and the inner cavity of the hose connector has a reinforcing rib with a center hole, and the finished products of the head end connector, the hose connector and the plurality of angle connectors obtained by processing have the same inner and outer diameters;
[0018] 5. Processing method of steel rope fixing ring:
[0019] Select stainless steel pipes or brass pipes and process them on online cutting machines according to product design requirements to obtain finished products;
[0020] 6. The steps of the snake bone assembly connection are as follows:
[0021] ①. Put the hose connector on the lowest end of the arc-shaped positioning mandrel of the snake bone special assembly tool, and the end of the hose connector with the front rotation groove facing upwards.
[0022] Next, one end of the middle rotating body of the angled coupling is placed downward on the arc-shaped positioning mandrel, and the middle rotating body of the angled coupling is aligned with the front rotating groove of the hose coupling.
[0023] Then, put one end of the middle rotating body of the same angle connecting ring downward on the arc-shaped positioning mandrel, and align the middle rotating body of the angle connecting ring with the position of the middle rotating groove of the lower angle connecting ring, and assemble all the angle connecting rings in this way according to the design requirements.
[0024] Then, the rear rotating body of the head end connecting ring is downwardly mounted on the uppermost end of the arc-shaped positioning core shaft, and the rear rotating body of the head end connecting ring is aligned with the position of the middle rotating groove of the angle connecting ring adjacent to it.
[0025] ②. First, weld a steel rope fixing ring to one end of the center steel wire rope, and then insert the other end of the center steel wire rope from the center hole on the reinforcement rib of the head end ring, and pass through the center hole on the reinforcement rib of the angle ring and the center hole on the reinforcement rib of the hose ring respectively. Clamp the passed center steel wire rope with tools, and pull out the excess center steel wire rope in the process design. At this time, the special assembly tool for the snake bone is changed from the previous vertical to the horizontal on the workbench, and a steel rope fixing ring is also welded on the other end of the center steel wire rope, and the steel rope fixing rings at both ends of the center steel wire rope are welded to the openings on the outer sides of the head end ring and the hose ring to complete the assembly of each ring of the snake bone.
[0026] In the above technical scheme, the snake bone assembly and connection step also includes the assembly of traction wire rope, and the specific steps are as follows: first, weld a wire rope fixing sleeve at one end of the traction wire rope, then erect the snake bone special assembly tool, and the other end of the traction wire rope is downward and passed through the front rope threading hole of the head end ring, the middle rope threading hole of the angle ring and the rear rope threading hole of the hose ring in sequence, and then lay the snake bone special assembly tool horizontally again, weld the wire rope fixing sleeve on the head end ring, and complete the assembly of the traction wire rope of the snake bone.
[0027] In the above technical solution, the hard plastic used for the head end ring, the hose ring and the plurality of angle rings is one of nylon injection, polyoxymethylene and polytetrafluoroethylene.
[0028] In the above technical solution, the powder metallurgy used for the head end ring, the hose ring and the plurality of angle rings is stainless steel powder metallurgy or aluminum alloy powder metallurgy.
[0029] In the above technical solution, the reinforcing ribs provided in the inner cavities of the head end connection ring, the angle connection ring and the hose connection ring are cross-shaped reinforcing ribs or straight-shaped reinforcing ribs.
[0030] In the above technical solution, the rear rotating body of the head end ring and the middle rotating body of the angle ring are both rotating ball heads, and the middle rotating groove of the angle ring and the front rotating groove of the hose ring are both ball sockets matching the rotating ball heads.
[0031] In the above technical solution, the rear rotating body of the head end ring and the middle rotating body of the angle ring are both cylindrical rotating bodies, and the middle rotating groove of the angle ring and the front rotating groove of the hose ring are both cylindrical grooves matching the cylindrical rotating bodies.
[0032] In the above technical scheme, the snake bone special assembly tool also includes a square reference seat, an isolation ring and a tapered end tightening screw. There are two arc-shaped positioning core shafts, and one end of each arc-shaped positioning core shaft is inserted into the socket of the square reference seat, and radially arranged screw holes are respectively provided at both ends of the square reference seat. The tapered end tightening screw is screwed into the corresponding screw hole and its end face is abutted against the outer wall of the corresponding arc-shaped positioning core shaft to connect the square reference seat and the arc-shaped positioning core shaft as a whole. The isolation ring is sleeved on the arc-shaped positioning core shaft, and the bottom of the isolation ring is supported on the end face of the square reference seat.
[0033] The positive effect of the present invention is that after adopting the assembly method of the disposable medical endoscope snake bone of the present invention, since the head end ring, the hose ring and the plurality of angle rings of the present invention are all made of hard plastic or powder metallurgy, the material cost of each ring of the snake bone of the present invention is low, and since each ring of the snake bone of the present invention can be integrally processed and formed in an injection molding machine or an injection molding machine, the surface itself is smooth and has no burrs, and no roller polishing is required, which not only simplifies the processing procedure, but also saves production costs and improves production efficiency. In addition, since the special assembly tool for the snake bone of the present invention can not only assemble the various rings of the snake bone into one, but also complete the rope threading process, not only is the assembly process simple, but also the operation is very convenient.
[0034] In summary, the snake bones produced by the present invention have the following advantages:
[0035] First, the material cost of each connecting ring of the present invention is low, which is much lower than the special stainless steel tube or stainless steel rod selected in the existing products, and is convenient for mold production, which greatly reduces the production cost and lays a good economic foundation for achieving disposable use.
[0036] Second, each connecting ring of the present invention rotates in coordination with the rotating body and the rotating groove, so that the overall structure of the snake bone is more reliable and stable, and the rotating body will not be separated from the rotating groove, and the rotation is more flexible and accurate. At the same time, the present invention also has high production efficiency and low production cost, is suitable for mass production, and is suitable for clinical disposable use.
[0037] Third, the present invention is suitable for the examination and diagnosis of diseases of the digestive system, respiratory system, and urinary system, or the census of related diseases because the manufacturing cost is greatly reduced. At the same time, the present invention can replace the technical solution of the existing technology that requires the repeated use of endoscopes, and there is no need to undergo strict and complicated disinfection, nor to worry about cross infection between patients.
[0038] Fourth, since the production volume of disposable snake bone products is large, and the amount treated as medical waste materials after use is also large, the product of the present invention can select environmentally friendly and easily degradable environmentally friendly plastics, which can reduce environmental pollution and effectively protect the environment. BRIEF DESCRIPTION OF THE DRAWINGS
[0039] Figure 1 It is a structural schematic diagram of a specific embodiment of the first snake bone of the present invention;
[0040] Figure 2 yes Figure 1 A schematic diagram of the structure of the middle head termination ring;
[0041] Figure 3 yes Figure 2 A right side schematic diagram of
[0042] Figure 4 yes Figure 2 AA cross-sectional view of ;
[0043] Figure 5 yes Figure 1 A schematic diagram of the structure of the middle bend angle connection ring;
[0044] Figure 6 yes Figure 5 A right side schematic diagram of
[0045] Figure 7 yes Figure 5 Schematic diagram of the left side;
[0046] Figure 8 yes Figure 5 BB cross-sectional view;
[0047] Fig. 9 yes Figure 1 Structural diagram of the middle hose connection ring;
[0048] Fig.10 yes Fig. 9 Schematic diagram of the left side;
[0049] Fig.11 yes Fig. 9 Schematic diagram of CC cross-section;
[0050] Fig.12 It is a structural schematic diagram of a second specific embodiment of the snake bone of the present invention;
[0051] Fig.13 It is a structural schematic diagram of a third specific embodiment of the snake bone of the present invention;
[0052] Fig.14 It is a structural schematic diagram of a fourth specific embodiment of the snake bone of the present invention;
[0053] Fig.15 It is a structural schematic diagram of the special assembly tool for snake bones of the present invention;
[0054] Fig.16 It is a schematic diagram of the use state of the snake bone special assembly tool of the present invention;
[0055] Fig.17 yes Fig.16 Schematic top view of . DETAILED DESCRIPTION
[0056] The present invention is further described below with reference to the accompanying drawings and given embodiments, but is not limited thereto.
[0057] like Figure 1 , 12, 13, and 14, a disposable medical endoscope snake bone can be applied to different types of endoscopes, such as bronchoscopes, ureteronephroscopes, gastroenteroscopes, etc. The snake bone includes a head end ring 1, a hose ring 3, and a plurality of angle rings 2 arranged between the head end ring 1 and the hose ring 3. The inner diameters of the head end ring 1, the hose ring 3, and the plurality of angle rings 2 are 4.3mm~12.9 mm, outer diameter is 4.9mm~13.5 mm, the snake bone also includes a central wire rope assembly, the central wire rope assembly includes a central wire rope 5 and a wire rope fixing ring 6, the length of the wire rope fixing ring 6 is 1.5mm~3.8 mm, inner diameter 0.3mm~1.2 mm, outer diameter 0.6mm~1.6 mm, the outer diameter of the central steel wire rope 5 is 0.26mm~0.8 mm.
[0058] like Figure 1-17 As shown, a method for assembling a disposable medical endoscope snake bone, the specific assembly steps are:
[0059] 1. Select materials:
[0060] a. The head end ring 1, the hose ring 3 and the plurality of angle rings 2 are all made of hard plastic or powder metallurgy and are ready for use;
[0061] b. The central steel wire rope 5 is a 7x7 micro stainless steel wire rope. A section of the stainless steel wire rope is cut, and its diameter and length are required by the product design. The steel wire rope fixing ring 6 is a stainless steel tube or a brass tube.
[0062] 2. Processing method of head terminal ring 1:
[0063] If the head end ring 1 is made of hard plastic, the hard plastic is injected into the injection mold of the injection molding machine for integral processing, and the hard plastic is one of nylon injection, polyoxymethylene, and polytetrafluoroethylene.
[0064] If the head terminal ring 1 is processed by powder metallurgy, the powder metallurgy is injected into the injection mold of the injection molding machine for integral processing, and the powder metallurgy is stainless steel powder metallurgy or aluminum alloy powder metallurgy, and the finished head terminal ring 1 is directly obtained.
[0065] That is, one end of the head end ring 1 is provided with a rear rotating body 11 arranged symmetrically along its axial direction, and the head end ring 1 also has a front rope threading hole 12, and the inner cavity of the head end ring 1 has a reinforcing rib with a center hole;
[0066] 3. Processing method of angle adapter 2:
[0067] If the angle connection ring 2 is made of hard plastic, the hard plastic is injected into the injection mold of the injection molding machine for integral molding, and the hard plastic is one of nylon injection, polyoxymethylene, and polytetrafluoroethylene.
[0068] If the angle connection ring 2 is processed by powder metallurgy, the powder metallurgy is injected into the injection mold of the injection molding machine for integrated processing, and the powder metallurgy is stainless steel powder metallurgy or aluminum alloy powder metallurgy, and the finished angle connection ring 2 is directly obtained.
[0069] That is, the two ends of the angle connecting ring 2 are respectively provided with intermediate rotating bodies 21 and intermediate rotating grooves 22 which are symmetrically arranged along the axial direction thereof, and the angle connecting ring 2 also has an intermediate rope threading hole 23, and the inner cavity of the angle connecting ring 2 has a reinforcing rib with a central hole;
[0070] 4. Processing method of hose connector 3:
[0071] If the hose collar 3 is made of hard plastic, the hard plastic is injected into the injection mold of the injection molding machine for integral molding, and the hard plastic is one of nylon injection, polyoxymethylene, and polytetrafluoroethylene.
[0072] If the hose connector 3 is processed by powder metallurgy, the powder metallurgy is injected into the injection mold of the injection molding machine for integral processing, and the powder metallurgy is stainless steel powder metallurgy or aluminum alloy powder metallurgy, and the finished hose connector 3 is directly obtained.
[0073] That is, one end of the hose collar 3 is provided with a symmetrically arranged front rotation groove 31 along its axial direction, and the hose collar 3 also has a rear rope threading hole 32, and the inner cavity of the hose collar 3 has a reinforcing rib with a center hole. The finished inner and outer diameters of the head end collar 1, the hose collar 3 and the plurality of angle collars 2 obtained by processing are consistent. This embodiment takes the outer diameter of each collar of the snake bone as 8.5mm and the inner diameter as 8mm as an example;
[0074] 5. Processing method of steel rope fixing ring 6:
[0075] Stainless steel tubes or brass tubes are selected and processed on an online cutting machine tool according to product design requirements to obtain finished products, and the length of the steel rope fixing ring 6 is 2.8 mm, inner diameter 0.6 mm, outer diameter 1.0 mm, in the specific processing process, more than 100 stainless steel pipes are bundled into a whole, and then the outer diameter perpendicular to the axis of the stainless steel pipe is directly cut by wire. According to the length requirement of the designed wire rope fixing ring, the molybdenum wire of the wire cutting machine runs once, and more than 100 pieces can be obtained by one-time straight line cutting, which not only has large output and high production efficiency, but also very low cost.
[0076] 6. The steps of the snake bone assembly connection are as follows:
[0077] ①. Put the hose connector 3 on the lowermost end of the arc-shaped positioning mandrel 41 of the snake bone special assembly tool 4, and the end of the hose connector 3 with the front rotation groove 31 is facing upwards.
[0078] Next, one end of the intermediate rotating body 21 of the angled connecting ring 2 is placed downward on the arc-shaped positioning core shaft 41, and the intermediate rotating body 21 of the angled connecting ring 2 is aligned with the front rotating groove 31 of the hose connecting ring 3 to be assembled.
[0079] Then, one end of the intermediate rotating body 21 of the same angle connecting ring 2 is downwardly mounted on the arc-shaped positioning core shaft 41, and the intermediate rotating body 21 of the angle connecting ring 2 is aligned with the position of the intermediate rotating groove 22 of the lower angle connecting ring 2, and all the angle connecting rings 2 are assembled in this way according to the design requirements.
[0080] Then, the rear rotating body 11 of the head end connecting ring 1 is downwardly mounted on the uppermost end of the arc-shaped positioning core shaft 41, and the rear rotating body 11 of the head end connecting ring 1 is aligned with the position of the middle rotating groove 22 of the angle connecting ring 2 adjacent to it.
[0081] ②. First, weld a steel rope fixing ring 6 to one end of the center steel wire rope 5, and then insert the other end of the center steel wire rope 5 from the center hole on the reinforcement rib of the head end ring 1, and pass through the center hole on the reinforcement rib of the angle ring 2 and the center hole on the reinforcement rib of the hose ring 3 respectively. Clamp the passed center steel wire rope 5 with a tool, and pull out the excess center steel wire rope 5 designed in the process. At this time, the snake bone special assembly tool 4 is changed from the previous vertical to the horizontal on the workbench, and a steel rope fixing ring 6 is also welded to the other end of the center steel wire rope 5, and the steel rope fixing rings 6 at both ends of the center steel wire rope 5 are welded to the openings on the outer sides of the head end ring 1 and the hose ring 3 to complete the assembly of each ring of the snake bone.
[0082] In order to facilitate the present invention, before the traction wire rope is assembled on the serpentine device, the central wire rope can be used to connect all the serpentine parts in series into one, and the total length between the two fixed heads of the central wire rope should be designed according to the requirements of the required positioning angle of the serpentine. The central wire rope of the present invention has the following advantages:
[0083] (1) It can effectively control the maximum bending angle designed for different medical endoscopes. After the "central wire rope" is assembled with a set of snake-bone rings, its technical features are:
[0084] First, the total length of the "center wire rope" must be longer than the total length of the center hole of the entire snake bone assembly, and a process gap must be left;
[0085] Second, the length of the "center wire rope" is such that there is enough clearance for it to move forward and backward in the center hole of the entire snake assembly;
[0086] Thirdly (the biggest advantage), the length of the "dimensional data" of the total length of the "central steel wire rope" is controlled to control the size of the bending angle. The larger the length "dimensional data", the larger the bending angle; conversely, the smaller the "dimensional data", the smaller the bending angle (because the maximum bending angle of different medical flexible endoscopes is different).
[0087] (2) They will not disperse randomly during the production cycle of upstream and downstream processes, thus protecting the products:
[0088] The "center wire rope" initially connects the snake bone end ring, snake bone corner ring, and snake bone hose ring without rivet connection. It is beneficial to the turnover or transportation between the upstream and downstream processes of production. The snake bone rings will not fall apart and the product will not be damaged during the process, which is beneficial to improving production efficiency and product protection.
[0089] (3) After the “central wire rope” initially fixes the entire “snake bone assembly”, it is beneficial to the perforation and assembly of slender endoscopes and improves work efficiency:
[0090] In the production process of assembling medical or industrial endoscopes, it can effectively prevent the snake-bone coupling parts (the number of snake-bone couplings is 16 to 46) from slipping backward along the traction wire rope (it was found in the original technology that when the first slender part was inserted into the hole, multiple parts of the "snake-bone assembly" originally assembled on the traction wire rope slipped backward and scattered). In the prior art. After the various snake-bone parts are assembled on the four traction wire ropes, the rear part of the snake-bone coupling often slides out and disengages along the (four) traction wire ropes to the rear, sometimes affecting the assembly speed of the internal slender parts, such as the camera cable, light guide, or LED lighting wire, or when inserting the LED lighting wire, many snake-bone couplings are scattered, affecting the assembly production of the next process.
[0091] Therefore, the structure after adding the central steel wire rope in the present invention significantly improves the production efficiency of assembling the "snake bone" and reduces the production cost.
[0092] like Figure 1 , 12, 13, 14 In order to realize the bending angle of the snake bone and ensure that the traction structure design is smoother, the traction wire rope has a low friction coefficient when moving in the rope threading holes of each part, and the traction bending angle is also easier. The snake bone assembly connection step described in the present invention also includes traction wire rope assembly, and its specific steps are as follows: first, weld a steel rope fixing sleeve 8 at one end of the traction wire rope 7, and then erect the snake bone special assembly tool 4, and the other end of the traction wire rope 7 is downward and passed through the front rope threading hole 12 of the head end connection ring 1, the middle rope threading hole 23 of the angle connection ring 2 and the rear rope threading hole 32 of the hose connection ring 3, and then lay the snake bone special assembly tool 4 horizontally again, weld the steel rope fixing sleeve 8 on the head end connection ring 1, and complete the assembly of the traction wire rope of the snake bone.
[0093] like Figure 1 and 12 As shown, they are all four-directional snake bones. If the snake bone can achieve bending angles in four directions of up, down, left and right, when two adjacent angle connecting rings are assembled on the snake bone special assembly tool 4, the upper angle connecting ring on the arc positioning core shaft 41 should be rotated 90° relative to the next angle connecting ring and then mounted on the arc positioning core shaft 41, and the middle rotating body of the upper angle connecting ring should be aligned with the middle rotating groove position of the lower angle connecting ring for assembly, and the four-directional snake bone has four traction steel ropes, the head end connecting ring 1, the angle connecting ring 2 and the hose connecting ring 3 respectively have four rope threading holes, the rear rotating body 11 of the head end connecting ring 1 has a through hole connected to a front rope threading hole, the middle rotating body of the angle connecting ring 2 has a through hole connected to a middle rope threading hole, the middle rotating groove of the angle connecting ring 2 is connected to a middle rope threading hole, the front rotating groove of the hose connecting ring 3 is connected to a rear rope threading hole, and each traction steel rope is respectively inserted in the corresponding rope threading hole.
[0094] like Fig.13 , 14 As shown, they are all two-way snake bones. If the snake bone realizes bending angles in the upper and lower directions, when two adjacent bending angle connecting rings are assembled on the snake bone special assembly tool 4, the intermediate rotating body of the upper bending angle connecting ring mounted on the arc-shaped positioning core shaft 41 is coaxially assembled with the intermediate rotating groove of the next bending angle connecting ring, and the two-way snake bone has two traction steel wire ropes, and the head end connecting ring 1, the bending angle connecting ring 2 and the hose connecting ring 3 respectively have two rope threading holes, and each traction steel wire rope is respectively inserted in the corresponding rope threading hole.
[0095] like Figure 3 , 6 , 7, 10 In order to improve the compressive strength of the parts and have a certain degree of anti-deformation strength when the traction angle snake bone device is subjected to force, the reinforcing ribs 9 provided in the inner cavity of the head end ring 1, the angle ring 2 and the hose ring 3 are cross-shaped reinforcing ribs. Of course, the reinforcing ribs can also be straight-line reinforcing ribs.
[0096] Furthermore, in order to ensure the firmness between the various connecting rings of the snake bone of the present invention, the rotating body is not easy to fall off from the rotating groove. Figure 1 The four-way snake bones and Fig.13 The two-way snake bone, the rear rotating body 11 of the head end ring 1 and the middle rotating body 21 of the angle ring 2 are both rotating ball heads, and the middle rotating groove 22 of the angle ring 2 and the front rotating groove 31 of the hose ring 3 are both ball sockets matching the rotating ball heads.
[0097] Or, if Fig.12 The four-way snake bones and Fig.14 The two-way snake bone, the rear rotating body 11 of the head end ring 1 and the middle rotating body 21 of the angle ring 2 are both cylindrical rotating bodies, and the middle rotating groove 22 of the angle ring 2 and the front rotating groove 31 of the hose ring 3 are both cylindrical grooves matching the cylindrical rotating bodies.
[0098] like Fig.15 , 16 As shown in Figures 17, in order to realize the assembly of each connecting ring, the assembly of the center wire rope, and the assembly of the traction wire rope, multiple processes can be completed by one tool, replacing the manual threading in the existing technology, which not only improves the assembly efficiency, but also improves the assembly accuracy. The snake bone special assembly tool 4 also includes a square reference seat 42, an isolation ring 43 and a cone-end tightening screw 44. There are two arc-shaped positioning core shafts 41, and one end of each arc-shaped positioning core shaft 41 is inserted into the jack of the square reference seat 42, and radially arranged screw holes are respectively provided at both ends of the square reference seat 42. The cone-end tightening screw 44 is screwed into the corresponding screw hole and its end face is abutted against the outer wall of the corresponding arc-shaped positioning core shaft 41, so that the square reference seat 42 and the arc-shaped positioning core shaft 41 are connected as a whole. The isolation ring 43 is sleeved on the arc-shaped positioning core shaft 41, and the bottom of the isolation ring 43 is supported on the end face of the square reference seat 42.
[0099] The specific steps for preparing the snake bone special assembly tool 4 of the present invention are as follows:
[0100] Step 1, processing of the square reference seat 42: select No. 45 steel, the quenching and tempering hardness is between HRC46 and HRC48, and use a wire cutting machine to complete the square block. First, use a drill press to process two through holes at the 1 / 4 arc hole position on the square block, and then use the molybdenum wire of the wire cutting machine to pass through the small hole, and cut the two 1 / 4 arc holes according to the requirements of the drawing. Then, two small screw holes are processed on the left and right sides of the middle of the two 1 / 4 circular arc through holes of the square reference seat, and the screw holes connected to the arc holes, the outside of the two small screw holes are two process holes larger than the screw hole diameter, and this process hole is for installing small screws for watch screwdrivers The process holes are cut and implemented according to the direction and position of the graphic. After the square reference seat is processed, the two 1 / 4 arc holes and the two 1 / 4 arc positioning mandrels are tolerance matched, without interference tolerance size, but can be inserted into the two semi-circular arc holes and the size of clearance fit. The matching accuracy is high, and the two arc mandrels are not loose or swinging after assembly; the verticality, position and other form and position tolerances of the two parts are very high. After the assembly is completed, it is completely matched with the two 1 / 4 arc slots at the 180-degree position of the snake bone. The reference seat of the assembly tooling and the 1 / 4 arc positioning shaft are all matched with the arc size of one-quarter of the snake bone.
[0101] Step 2, the processing of the arc positioning mandrel 41: the selected material is 45 steel (GCr15 bearing steel quenched and tempered), the quenching and tempering hardness is between HRC46 and HRC48, and after aging treatment, it is processed on the online cutting machine according to the requirements of the drawing. Note that the 1 / 4 arc-shaped long rod is firstly wire-cut, and then the wire-cut is made to the length specified in the drawing. Only after that can the arc positioning mandrel be processed.
[0102] Step 3: Processing of the isolation ring 43: The material is stainless steel bar or HPB59-1 brass bar, which is processed on a lathe according to the drawing requirements.
[0103] Step 4: The assembly method of the snake bone special assembly tooling is as follows:
[0104] a. Place the square reference seat 42 obtained in step 1 on the reference platform seat according to the drawing requirements, with the end with the arc hole facing downward;
[0105] b. Insert the two 1 / 4 circle arc-shaped positioning mandrels 41 obtained in step 2 into the two 1 / 4 circle arc-shaped holes of the square reference seat 41 according to the requirements of the drawing, and insert them into the reference platform seat below the square reference seat 41 to contact its plane;
[0106] c. Then respectively install two conical-end tightening screws 44 (standard parts purchased from outside) into the two small screw holes of the square reference seat 42, and then use a small watch screwdriver tool to respectively fix the two arc-shaped positioning mandrels 41 in the arc-shaped positioning holes of the square reference seat 42 to complete the assembly of the snake bone special assembly tool.
[0107] The head end connection ring, hose connection ring and several angle connection rings described in the present invention are all made of hard plastic or powder metallurgy. Therefore, the material cost of each connection ring of the snake bone of the present invention is low. In addition, since each connection ring of the snake bone of the present invention can be integrally processed by an injection molding machine and a post-injection press machine, its surface itself is smooth and has no burrs, and no roller polishing is required. Not only is the processing procedure simple, but it also saves production costs and improves production efficiency. In addition, since the special assembly tool for the snake bone of the present invention can not only assemble the various connection rings of the snake bone into one, but also complete the rope threading process, not only is the assembly process simple, but the operation is also very convenient.
[0108] Therefore, the advantages of the snake bone assembled by the present invention are:
[0109] First, the whole snake bone device has a simple structural design. Since the material cost of each connecting ring of the present invention is low, the cost is much lower than that of the special stainless steel tube or stainless steel rod selected in the existing products, which is convenient for mold production, greatly reducing the production cost and laying a good economic foundation for achieving disposable use.
[0110] Second, the various connecting rings of the snake bone of the present invention are integrally formed by an injection molding machine or an injection molding machine, and the surface itself is smooth and burr-free, and no roller polishing is required, which not only simplifies the processing process, but also saves production costs and improves production efficiency.
[0111] Thirdly, each connecting ring of the present invention rotates with the rotating ball head and the ball socket or with the cylindrical rotating body and the cylindrical groove, so that the overall structure of the snake bone is more reliable and stable, and the rotating ball head will not be separated from the ball socket (the cylindrical rotating body will not be separated from the cylindrical groove), and the rotation is more flexible and accurate. At the same time, the present invention also has high production efficiency and low production cost, is suitable for mass production, and is suitable for clinical disposable use.
[0112] Fourthly, the traction structure design of the snake bone of the present invention is smoother, the traction wire rope moves in the rope threading holes of each part, the friction coefficient is low, and the traction angle is easier.
[0113] Fifth, each connecting ring of the snake bone of the present invention is provided with a cross-shaped (straight) reinforcing rib inside, which is to improve the compressive strength of the parts and to have a certain strength to resist deformation when the traction bending angle snake bone device is subjected to force. The design of the central steel wire rope enables it to more accurately control the size of the bending angle.
[0114] Sixth, the special assembly tool for the snake bone of the present invention can not only assemble the various connecting rings of the snake bone into one, but also complete the threading process of the central steel wire rope and the threading process of the traction steel wire rope. Not only is the assembly process simple, but the operation is also very convenient.
[0115] Seventh, the present invention is suitable for the examination and diagnosis of diseases of the digestive system, respiratory system, urinary system, etc., or the census of related diseases due to the greatly reduced manufacturing cost. At the same time, the present invention replaces the technical solution of the prior art that the endoscope needs to be reused, that is, there is no need to undergo strict and complicated disinfection, and there is no need to worry about cross infection between patients.
[0116] Eighth, because the production volume of disposable snake bone products is large, and the amount of materials to be treated as medical waste after use is also large, the product of the present invention can select environmentally friendly and easily degradable environmentally friendly plastics, which can reduce environmental pollution and effectively protect the environment. For example, environmentally friendly plastics such as polypropylene (PP) and polycarbonate (PC) and other hard plastics can be injection molded to produce a disposable endoscope snake bone of the invention.
[0117] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.
Claims
1. A method for assembling a disposable medical endoscope snake, the snake comprising a head end ring (1), a hose ring (3) and a plurality of angle rings (2) arranged between the head end ring (1) and the hose ring (3), Features: It also includes a central steel wire rope assembly, which includes a central steel wire rope (5) and a steel rope fixing ring (6). The specific assembly steps are as follows:
1. Select materials: a. The head end ring (1), the hose ring (3) and the plurality of angle rings (2) are all made of hard plastic or powder metallurgy and are kept in reserve; b. The central steel wire rope (5) is directly cut from a stainless steel wire rope, and its diameter and length are required by the product design. The steel wire rope fixing ring (6) is made of a stainless steel tube or a brass tube.
2. Processing method of the head end ring (1): If the head end connection ring (1) is processed by hard plastic, the hard plastic is injected into the injection mold of the injection molding machine for integrated processing and molding; if the head end connection ring (1) is processed by powder metallurgy, the powder metallurgy is injected into the injection mold of the injection molding machine for integrated processing and molding, and the finished head end connection ring (1) is directly obtained, that is, one end of the head end connection ring (1) is provided with a rear rotating body (11) arranged symmetrically along its axial direction, and the head end connection ring (1) also has a front rope threading hole (12), and the inner cavity of the head end connection ring (1) has a reinforcing rib with a center hole; 3. Processing method of the angle adapter (2): If the angle connection ring (2) is processed by hard plastic, the hard plastic is injected into the injection mold of the injection molding machine for integrated processing and molding; if the angle connection ring (2) is processed by powder metallurgy, the powder metallurgy is injected into the injection mold of the injection molding machine for integrated processing and molding, and the finished angle connection ring (2) is directly obtained, that is, the two ends of the angle connection ring (2) are respectively provided with intermediate rotating bodies (21) and intermediate rotating grooves (22) arranged symmetrically along the axial direction thereof, and the angle connection ring (2) also has an intermediate rope threading hole (23), and the inner cavity of the angle connection ring (2) has a reinforcing rib with a center hole; 4. Processing method of hose connector (3): If the hose connector (3) is made of hard plastic, the hard plastic is injected into the injection mold of the injection molding machine for integrated processing and molding; if the hose connector (3) is made of powder metallurgy, the powder metallurgy is injected into the injection mold of the injection molding machine for integrated processing and molding, and the finished hose connector (3) is directly obtained, that is, one end of the hose connector (3) is provided with symmetrically arranged front rotation grooves (31) along its axial direction, and the hose connector (3) also has a rear rope threading hole (32), and the inner cavity of the hose connector (3) has a reinforcing rib with a center hole, and the finished products of the head end connector (1), the hose connector (3) and the plurality of angle connectors (2) obtained by processing have the same inner and outer diameters; 5. Processing method of steel rope fixing ring (6): Select stainless steel pipes or brass pipes and process them on online cutting machines according to product design requirements to obtain finished products; 6. The steps of the snake bone assembly connection are as follows: ①. Put the hose connector (3) on the lowermost end of the arc-shaped positioning mandrel (41) of the snake bone special assembly tool (4), and the end of the hose connector (3) with the front rotation groove (31) facing upwards. Next, one end of the intermediate rotating body (21) of the angled connecting ring (2) is placed downward on the arc-shaped positioning core shaft (41), and the intermediate rotating body (21) of the angled connecting ring (2) is aligned with the front rotating groove (31) of the hose connecting ring (3) for assembly. Then, one end of the intermediate rotating body (21) of the same angle connecting ring (2) is downwardly mounted on the arc-shaped positioning core shaft (41), and the intermediate rotating body (21) of the angle connecting ring (2) is aligned with the position of the intermediate rotating groove (22) of the lower angle connecting ring (2) for assembly. All the angle connecting rings (2) are assembled in the same manner according to the design requirements. Then, the rear rotating body (11) of the head end connecting ring (1) is downwardly mounted on the uppermost end of the arc-shaped positioning core shaft (41), and the rear rotating body (11) of the head end connecting ring (1) is aligned with the position of the middle rotating groove (22) of the angle connecting ring (2) adjacent to it. ②, first weld a steel rope fixing ring (6) to one end of the central steel wire rope (5), then insert the other end of the central steel wire rope (5) from the center hole on the reinforcing rib of the head end ring (1), and pass through the center hole on the reinforcing rib of the angle ring (2) and the center hole on the reinforcing rib of the hose ring (3), respectively, clamp the passed central steel wire rope (5) with a tool, and pull out the excess central steel wire rope (5) in the process design. At this time, the snake bone special assembly tool (4) is changed from the previous vertical to the horizontal in the process. On the workbench, a steel wire fixing ring (6) is also welded to the other end of the central steel wire (5), and the steel wire fixing rings (6) at both ends of the central steel wire (5) are welded to the openings on the outer sides of the head end connection ring (1) and the hose connection ring (3). The total length of the central steel wire (5) is designed to be longer than the total length of the central hole of the entire snake bone assembly. The length of the total length of the central steel wire is controlled to control the size of the bending angle, and at the same time, the assembly of each connection ring of the snake bone is completed.
2. The method for assembling the disposable medical endoscope snake according to claim 1, Features: The snake-bone assembly and connection step also includes the assembly of the traction steel wire rope, and the specific steps are as follows: first, a steel wire fixing sleeve (8) is welded on one end of the traction steel wire rope (7), and then the snake-bone special assembly tool (4) is erected, and the other end of the traction steel wire rope (7) is passed downward through the front rope hole (12) of the head end ring (1), the middle rope hole (23) of the angle ring (2) and the rear rope hole (32) of the hose ring (3) in sequence, and the snake-bone special assembly tool (4) is laid horizontally again, and the steel wire fixing sleeve (8) is welded on the head end ring (1), thereby completing the assembly of the traction steel wire rope of the snake-bone.
3. The method for assembling the disposable medical endoscope snake bone according to claim 1, Features: The hard plastic used for the head end connection ring (1), the hose connection ring (3) and the plurality of angle connection rings (2) is one of nylon injection, polyoxymethylene and polytetrafluoroethylene.
4. The method for assembling the disposable medical endoscope snake according to claim 1, Features: The powder metallurgy used for the head end connection ring (1), the hose connection ring (3) and the plurality of angle connection rings (2) is stainless steel powder metallurgy or aluminum alloy powder metallurgy.
5. The method for assembling the disposable medical endoscope snake according to claim 1, Features: The reinforcing ribs (9) provided in the inner cavities of the head end connection ring (1), the angle connection ring (2) and the hose connection ring (3) are cross-shaped reinforcing ribs or straight-shaped reinforcing ribs.
6. The method for assembling the disposable medical endoscope snake according to claim 1, Features: The rear rotating body (11) of the head end connection ring (1) and the middle rotating body (21) of the angle connection ring (2) are both rotating ball heads, and the middle rotating groove (22) of the angle connection ring (2) and the front rotating groove (31) of the hose connection ring (3) are both ball sockets matching the rotating ball heads.
7. The method for assembling the disposable medical endoscope snake according to claim 1, Features: The rear rotating body (11) of the head end connecting ring (1) and the middle rotating body (21) of the angle connecting ring (2) are both cylindrical rotating bodies, and the middle rotating groove (22) of the angle connecting ring (2) and the front rotating groove (31) of the hose connecting ring (3) are both cylindrical grooves matching the cylindrical rotating bodies.
8. The method for assembling the disposable medical endoscope snake according to claim 1, Features: The snake bone special assembly tool (4) also includes a square reference seat (42), an isolation ring (43) and a cone-end tightening screw (44). There are two arc-shaped positioning mandrels (41), and one end of each arc-shaped positioning mandrel (41) is inserted into the insertion hole of the square reference seat (42). Both ends of the square reference seat (42) are respectively provided with radially arranged screw holes. The cone-end tightening screw (44) is screwed into the corresponding screw hole and its end face is abutted against the outer wall of the corresponding arc-shaped positioning mandrel (41), so that the square reference seat (42) and the arc-shaped positioning mandrel (41) are connected as a whole. The isolation ring (43) is sleeved on the arc-shaped positioning mandrel (41), and the bottom of the isolation ring (43) is supported on the end face of the square reference seat (42).