CN110420006B - Insertion tube assembly of upper digestive tract endoscope - Google Patents
Insertion tube assembly of upper digestive tract endoscope Download PDFInfo
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- CN110420006B CN110420006B CN201910815099.3A CN201910815099A CN110420006B CN 110420006 B CN110420006 B CN 110420006B CN 201910815099 A CN201910815099 A CN 201910815099A CN 110420006 B CN110420006 B CN 110420006B
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- spring
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- fixing ring
- traction
- seat
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- 238000003780 insertion Methods 0.000 title claims abstract description 48
- 230000037431 insertion Effects 0.000 title claims abstract description 48
- 210000001035 gastrointestinal tract Anatomy 0.000 title description 7
- 238000007789 sealing Methods 0.000 claims abstract description 25
- 230000002093 peripheral effect Effects 0.000 claims abstract description 10
- 238000005452 bending Methods 0.000 claims description 25
- 238000009434 installation Methods 0.000 claims description 19
- 239000011527 polyurethane coating Substances 0.000 claims description 19
- 229920006264 polyurethane film Polymers 0.000 claims description 6
- 238000009941 weaving Methods 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims 1
- 239000004814 polyurethane Substances 0.000 claims 1
- 229920002635 polyurethane Polymers 0.000 claims 1
- 210000002438 upper gastrointestinal tract Anatomy 0.000 abstract description 6
- 238000003466 welding Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 210000001187 pylorus Anatomy 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 210000001198 duodenum Anatomy 0.000 description 4
- 210000003238 esophagus Anatomy 0.000 description 4
- 230000002496 gastric effect Effects 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 206010011409 Cross infection Diseases 0.000 description 3
- 206010029803 Nosocomial infection Diseases 0.000 description 3
- 238000003745 diagnosis Methods 0.000 description 3
- 210000003128 head Anatomy 0.000 description 3
- 238000004659 sterilization and disinfection Methods 0.000 description 3
- 210000002784 stomach Anatomy 0.000 description 3
- 239000000645 desinfectant Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 210000000436 anus Anatomy 0.000 description 1
- 238000001574 biopsy Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002183 duodenal effect Effects 0.000 description 1
- 210000000936 intestine Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000000214 mouth Anatomy 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000007847 structural defect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00064—Constructional details of the endoscope body
- A61B1/00071—Insertion part of the endoscope body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00064—Constructional details of the endoscope body
- A61B1/00071—Insertion part of the endoscope body
- A61B1/0008—Insertion part of the endoscope body characterised by distal tip features
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00112—Connection or coupling means
- A61B1/00121—Connectors, fasteners and adapters, e.g. on the endoscope handle
- A61B1/00128—Connectors, fasteners and adapters, e.g. on the endoscope handle mechanical, e.g. for tubes or pipes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00131—Accessories for endoscopes
- A61B1/00137—End pieces at either end of the endoscope, e.g. caps, seals or forceps plugs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/005—Flexible endoscopes
- A61B1/0051—Flexible endoscopes with controlled bending of insertion part
- A61B1/0055—Constructional details of insertion parts, e.g. vertebral elements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/005—Flexible endoscopes
- A61B1/0051—Flexible endoscopes with controlled bending of insertion part
- A61B1/0057—Constructional details of force transmission elements, e.g. control wires
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/012—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/273—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor for the upper alimentary canal, e.g. oesophagoscopes, gastroscopes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0043—Catheters; Hollow probes characterised by structural features
- A61M25/0045—Catheters; Hollow probes characterised by structural features multi-layered, e.g. coated
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0043—Catheters; Hollow probes characterised by structural features
- A61M25/005—Catheters; Hollow probes characterised by structural features with embedded materials for reinforcement, e.g. wires, coils, braids
- A61M25/0053—Catheters; Hollow probes characterised by structural features with embedded materials for reinforcement, e.g. wires, coils, braids having a variable stiffness along the longitudinal axis, e.g. by varying the pitch of the coil or braid
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Biophysics (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- General Health & Medical Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Biomedical Technology (AREA)
- Medical Informatics (AREA)
- Physics & Mathematics (AREA)
- Molecular Biology (AREA)
- Radiology & Medical Imaging (AREA)
- Pathology (AREA)
- Optics & Photonics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Pulmonology (AREA)
- Anesthesiology (AREA)
- Hematology (AREA)
- Gastroenterology & Hepatology (AREA)
- Mechanical Engineering (AREA)
- Endoscopes (AREA)
Abstract
The invention relates to an insertion tube assembly of an upper gastrointestinal tract endoscope, comprising: the traction spring assembly structure comprises a spring fixing ring and four traction springs, wherein the spring fixing ring is arranged at a front connecting part of the main hose, one ends of the four springs are arranged on the spring fixing ring, the traction spring assembly structure further comprises an operating system connecting mechanism which comprises a rear seat and a fastening nut, the rear seat is fixedly connected with the rear connecting part of the main hose, the fastening nut is sleeved on the rear seat, a positioning groove is formed in the peripheral wall of the rear connecting seat and located on the outer side of the fastening nut, and a sealing ring is arranged at the outer periphery of the end part of the rear seat and located on the outer side of the axial positioning groove; four spring mounting grooves which are arranged separately are formed in the inner wall of the spring fixing ring along the axial direction of the spring fixing ring, and one ends of the four traction springs are respectively arranged in the corresponding spring mounting grooves. The invention is in sealing connection with the operation assembly, and the rotation can not occur after the assembly.
Description
Technical Field
The invention relates to an insertion tube assembly, in particular to an insertion tube assembly of an upper gastrointestinal tract endoscope, and belongs to the technical field of medical instruments.
Background
The upper gastrointestinal endoscope can be inserted into upper gastrointestinal tract to check and diagnose upper gastrointestinal tract such as esophagus, spouted gate, antral cavity, stomach angle, fundus, pylorus, and upper duodenal corner.
At present, the structural defects of the upper gastrointestinal tract are as follows:
Firstly, in a specific use process of the medical flexible endoscope, after the insertion tube is connected with an operation tube of an operation assembly, the joint is easy to loosen, so that the insertion tube rotates leftwards or rightwards, further the bending assembly connected with the head of the insertion tube is deviated in the bending process, the insertability, the examination and the diagnosis of the gastroduodenal are directly influenced, or the pain of a tested person is increased;
Secondly, it belongs to semi-sealed medical soft endoscope, namely the head of the insertion tube assembly and the whole insertion part of the bending part are sealed structures, and all structures of the tail of the insertion tube backward are unsealed structures, so that a complete endoscope can be sterilized only at the front, unsealed structure parts can not enter sterilizing liquid for sterilization, and the rear structure can not be sterilized, thus cross infection problem is easy to occur;
Thirdly, in the prior art, the traction spring tube is directly welded on the hole wall of the inner hole of the spring fixing ring, firstly, the inner hole of the spring fixing ring is small, so that the welding is difficult, the labor and time are wasted, and the efficiency is low; secondly, four traction spring pipes are easy to skew after being welded, the axes of the traction spring pipes are not parallel to the central axis of the spring fixing ring, so that the traction spring pipes can occupy the space position in the aperture, the assembly of related parts of the original design device in the insertion pipe hole is affected, for example, a clamp pipe is not inserted into a corresponding hole channel in the spring fixing ring, thirdly, the error of form and position tolerance of different axes is larger between the axes of the spring pipes and the axes of the traction steel wire ropes, and when the endoscope operates the bent angle traction steel wire ropes, the friction force between the skewed spring holes and the steel wire ropes is large, and the product quality problem of the steel wire ropes is easy to wear or grind.
Disclosure of Invention
The purpose of the invention is that: the insertion tube assembly of the upper digestive tract endoscope can not only be assembled with the operation assembly and can not rotate, ensure the tightness of the connection between the operation assembly and the operation assembly, but also position and assemble the traction spring.
In order to achieve the above purpose, the technical scheme of the invention is as follows: an insertion tube assembly for an upper enteroscope, comprising:
The main hose comprises a spring tube and a woven mesh tube, the woven mesh tube is sleeved on the periphery of the spring tube, the main hose comprises a front connecting part, a middle part and a rear connecting part, the spring tube and the woven mesh tube of the front connecting part and the rear connecting part are welded into a whole, a medical polyurethane coating is arranged on the periphery of the woven mesh tube of the middle part, and a medical transparent polyurethane film is arranged on the periphery of the medical polyurethane coating;
traction spring assembly structure, traction spring assembly structure includes spring retainer plate and four traction springs, the preceding connecting portion at main hose is established to the spring retainer plate, and four traction springs's one end is established on the spring retainer plate to four traction springs all insert in the spring pipe, and its innovation point lies in:
The connecting mechanism of the operation system comprises a rear seat and a fastening nut, the rear seat is fixedly connected with the rear connecting part of the main hose, the fastening nut is sleeved on the rear seat, an axial positioning groove is formed in the peripheral wall of the rear connecting seat and located on the outer side of the fastening nut, four traction springs penetrate out of the rear seat, and a sealing ring is arranged on the outer periphery of the end part of the rear seat and located on the outer side of the axial positioning groove;
four spring mounting grooves which are arranged separately are formed in the inner wall of the spring fixing ring along the axial direction of the spring fixing ring, and one ends of the four traction springs are respectively arranged in the corresponding spring mounting grooves.
In the above technical scheme, traction spring subassembly structure still includes the front seat, the front seat is including mutual spring retainer plate linkage segment and the preceding linkage segment as an organic whole, preceding linkage segment and the preceding connecting portion fixed connection of main hose, and the periphery of preceding linkage segment is equipped with medical transparent polyurethane film, spring retainer plate snare dress is in the periphery of spring retainer plate linkage segment and rather than fixed connection.
In the above technical scheme, the inner hole of the spring retainer plate is provided with the pipe-in-pipe installation channel, and the included angle formed between the first spring installation groove and the second spring installation groove which are positioned at the two sides of the pipe-in-pipe installation channel and the central line of the inner hole of the spring retainer plate is 96 degrees to 100 degrees, and the other two spring installation grooves are uniformly distributed on the inner wall of the spring retainer plate at the outer side of the pipe-in-pipe installation channel.
In the above technical scheme, the back seat has the main hose connecting portion and the operating system connecting portion of each other as an organic whole, main hose connecting portion and the back connecting portion fixed connection of main hose, the periphery of operating system connecting portion is equipped with fastening nut and axial positioning groove.
In the above technical scheme, be equipped with the sealing washer mounting groove on the periphery wall of operating system connecting portion, and the sealing washer mounting groove is located the outside of constant head tank, be equipped with the sealing washer in the sealing washer mounting groove.
In the above technical scheme, the number of the axial positioning grooves on the peripheral wall of the rear connecting seat is a multiple of 4.
In the above technical scheme, the operating system connecting part is provided with a taper hole and a step hole which are coaxially arranged, and the step hole is positioned at the inner side of the taper hole.
In the above technical scheme, the spring retainer plate includes traction spring fixed section and front seat connecting section that is as an organic whole and have the coaxial line each other, be equipped with four separately arranged spring mounting grooves on traction spring fixed section's the inner wall and along its axial direction, front seat connecting section suit is at the spring retainer plate connecting section periphery of front seat.
In the technical proposal, the middle part of the main hose is divided into four sections along the length thereof, the pitch P 11 of the spring tube of the first section is 2.3 mm-3.1 mm, the pitch P 12 of the spring tube of the second section is 2.6 mm-3.3 mm, the pitch P 13 of the spring tube of the third section is 2.9 mm-3.6 mm, the pitch P 14 of the spring tube of the fourth section is 3.3 mm-3.9 mm, and P 11＜P12＜P13＜P14,
The Shore hardness A 1 of the medical polyurethane coating of the first section is 35-39, the Shore hardness A 2 of the medical polyurethane coating of the second section is 48-56, the Shore hardness A 3 of the medical polyurethane coating of the third section is 65-75, the Shore hardness A 4 of the medical polyurethane coating of the fourth section is 78-85, and A 1＜A2＜A3＜A4,
The outer diameter phi of the woven mesh tube is 5.6-10 mm, the weaving angle beta of the woven mesh tube is 38-42 degrees, and the pitch H of the crossing points of the woven mesh tube is 2-3 mm.
The invention has the positive effects that: after the insertion tube assembly of the upper enteroscope is adopted, the invention further comprises an operation system connecting mechanism, wherein the operation system connecting mechanism comprises a rear seat and a fastening nut, the rear seat is fixedly connected with the rear connecting part of the main hose, the fastening nut is sleeved on the rear seat, an axial positioning groove is formed in the peripheral wall of the rear connecting seat and positioned at the outer side of the fastening nut, and four traction springs penetrate out of the rear seat, so that an operation part connecting cylinder of an operation component is connected with the rear seat, the operation part connecting cylinder is firstly rotated to be screwed into a positioning groove in the rear seat by a radial screw on the operation part connecting cylinder, and then the fastening nut is screwed, so that the operation part connecting cylinder and the rear seat are tightly fixed into a whole, the phenomenon that the joint of the rear seat and the operation part connecting cylinder is loosened can be effectively prevented, the operation part connecting cylinder does not rotate left and right, the connection reliability of the operation part connecting cylinder is ensured, the bending component is prevented from deviating in the bending process, the insertion accuracy of the colonoscope is improved, and the pain of a subject is reduced;
the outer periphery of the end part of the rear connecting seat is provided with the sealing ring which is positioned at the outer side of the axial positioning groove, so that the rear connecting seat is in sealing connection with the operation part connecting cylinder of the operation system through the sealing ring, the backward structure of the rear connecting part of the insertion tube assembly is also a sealing structure, and the rear connecting part can be completely soaked in disinfectant for sterilization and disinfection, so that on one hand, the problem of cross infection of a medical endoscope can be effectively prevented, on the other hand, external liquid, water vapor and the like can be effectively prevented from entering the endoscope, the ageing of internal electrical components is prevented, and the service life of medical equipment is prolonged;
And because the inner wall of the spring fixing ring is provided with four spring mounting grooves which are separately arranged along the axial direction of the spring fixing ring, one ends of the four traction springs are respectively arranged in the corresponding spring mounting grooves, so that the welding is convenient, the time and the labor are saved, the assembly efficiency is improved, the positioning welding is carried out on the springs, the springs can be ensured not to be inclined after being welded, and the welding quality and the reliability are ensured.
Drawings
FIG. 1 is a schematic diagram of the structure of an embodiment of the present invention;
FIG. 2 is a schematic illustration of the structural connection of the main hose to the traction spring assembly of the present invention;
FIG. 3 is a schematic view of the connection of the main hose to the operating system connection mechanism of the present invention;
FIG. 4 is a left side schematic view of the spring retainer ring of the present invention;
FIG. 5 is a schematic view of the structure of the backseat of the invention;
FIG. 6 is a schematic view of the construction of the main hose of the present invention;
fig. 7 is a schematic view of the structure of the woven mesh tube of fig. 6;
fig. 8 is a schematic structural view of the connection between the rear seat and the operation part connecting cylinder of the operation system.
Detailed Description
The invention is further illustrated, but not limited, by the following examples in connection with the accompanying drawings.
As shown in fig. 1,2,3, 4, 5, 6, 7, 8, an insertion tube assembly for an upper enteroscope, comprising:
The main hose 1, the main hose 1 comprises a spring tube 11 and a woven mesh tube 12, the woven mesh tube 12 is sleeved on the periphery of the spring tube 11, the main hose 1 comprises a front connecting part, a middle part and a rear connecting part, the spring tube 11 and the woven mesh tube 12 of the front connecting part and the rear connecting part are welded into a whole, a medical polyurethane coating 13 is arranged on the periphery of the woven mesh tube 12 of the middle part, and a medical transparent polyurethane film 14 is arranged on the periphery of the medical polyurethane coating 13;
a traction spring assembly structure 2, the traction spring assembly structure 2 comprises a spring fixing ring 21 and four traction springs 22, the spring fixing ring 21 is arranged at the front connecting part of the main hose 1, one end of each of the four traction springs 22 is arranged on the spring fixing ring 21, and each of the four traction springs 22 is inserted into the spring tube 11,
The operation system connecting mechanism 3 comprises a rear seat 31 and a fastening nut 32, the rear seat 31 is fixedly connected with the rear connecting part of the main hose 1, the fastening nut 32 is sleeved on the rear seat 31, an axial positioning groove 311 is formed in the peripheral wall of the rear seat 31 and located on the outer side of the fastening nut 32, four traction springs 22 penetrate out of the rear seat 31, a sealing ring 33 is arranged on the periphery of the end part of the rear seat 31 and located on the outer side of the axial positioning groove 311, and the sealing ring 33 can be an annular sealing ring with a circular section or an annular sealing ring with a rectangular section;
Four spring mounting grooves 211 which are arranged separately are arranged on the inner wall of the spring fixing ring 21 along the axial direction of the spring fixing ring, and one ends of the four traction springs 22 are respectively arranged in the corresponding spring mounting grooves 211.
The insertion tube assembly of the upper gastrointestinal endoscope has the length of 1180-1380 mm and the size of phi 8-phi 11mm, and can be inserted into the extreme end of the duodenum. The spring tube 11 of the main hose 1 is a left-handed spring tube or a right-handed spring tube, the outer surface of the medical polyurethane coating 13 is provided with a length marking line and a length marking size, and the medical transparent polyurethane film 14 is used for protecting the imprinting coating.
The insertion part of the insertion tube assembly of the upper gastrointestinal endoscope is inserted from the oral cavity of a human body, passes through the esophagus, the spouting gate, the stomach and the pylorus and enters the duodenum. The pressure of the upper digestive tract such as esophagus, spouted gate and the like and the closing force of the spouted gate and the pylorus are small, and the closing force is between about 0.7Kpa and 1.2 Kpa. The pressure in the inner cavity of human esophagus, spout door, stomach, pylorus and duodenum is much smaller than that in human anus and intestine. Therefore, the spring in the main hose is designed as a single-layer spring, so that the strength requirements of compression resistance and deformation resistance of the insertion tube of the gastroduodenal mirror in use are ensured.
As shown in fig. 1 and 2, for convenience, the front connecting portion of the main hose and the spring fixing ring are fixedly connected, the traction spring assembly structure 2 further comprises a front seat 23, the front seat 23 comprises a spring fixing ring connecting section 231 and a front connecting section 232 which are integrated with each other, the front connecting section 232 is fixedly connected with the front connecting portion of the main hose 1, the periphery of the front connecting section 232 is provided with a medical transparent polyurethane film 14, and the spring fixing ring 21 is sleeved on the periphery of the spring fixing ring connecting section 231 and is fixedly connected with the spring fixing ring connecting section 231.
As shown in fig. 4, the inner hole of the spring retainer 21 has a pipe-clamping channel 212, and the first spring mounting groove 2111 and the second spring mounting groove 2112 located at two sides of the pipe-clamping channel 212 form an angle of 96 ° to 100 ° with the center line of the inner hole of the spring retainer 21, and the other two spring mounting grooves 211 are uniformly distributed on the inner wall of the spring retainer 21 outside the pipe-clamping channel 212. As can be seen from the figure, two traction springs (the first spring installation groove 2111 and the second spring installation groove 2112) among the four traction springs are respectively offset from the horizontal direction or the vertical direction by an angle of 3 ° to 5 °, and the space of the third quadrant is increased for the large forceps tube, because the finer and smaller the insertion tube inserted into the human body is, the better. But is too thin and too small, the cable of the camera and the thicker forceps tube needed to access the surgical instrument are not inserted, so the 3 rd quadrant position in the existing bore is increased by offsetting the angle of the spring weld position.
As shown in fig. 5, in order to make the structure of the present invention more reasonable, the main hose is conveniently connected with the operating system through the rear socket 31, the rear socket 31 has a main hose connecting portion 312 and an operating system connecting portion 313 which are integrated with each other, the main hose connecting portion 312 is fixedly connected with the rear connecting portion of the main hose 1, and the periphery of the operating system connecting portion 313 is provided with a fastening nut 32 and an axial positioning groove 311. When in use, the operation part connecting cylinder of the operation system is sleeved on the periphery of the operation system connecting part 313 of the rear seat 31 and is tightly fixed into a whole through a taper end screw, and the end part of the taper end screw is locked in the positioning groove 311.
As shown in fig. 8, the end of the rear seat of the insertion tube assembly is threaded through the operation portion connecting cylinder hole leftward, and is screwed onto the end surface of the operation portion connecting cylinder 4 with a fastening nut. In order to ensure that the insertion tube assembly does not rotate, the invention also provides for the use of standard small screw holes in the operating portion connecting barrel 4 for the installation of tapered end set screws 5. The position of the operation portion connecting tube 4 where the standard small screw hole is designed is a position on the operation portion, i.e., on the upright center line of the endoscope (instrument). The cone end set screw 5 is screwed into the positioning groove of the rear seat 31, and the positioning groove is positioned on the axis right in the middle of the printed mark on the upper surface of the insertion tube assembly, and is consistent with the axis of a traction spring at the upper part of the front end welding of the insertion tube. Therefore, the positioning groove with multiple of 4 is just in line with the position of the XY cross center line of the section of the insertion tube, and can be assembled with the cross center line of the parts in front of or behind the insertion tube to a consistent position, so that the insertion tube can not rotate left and right, and after the endoscope is inserted into the inner cavity of a human body, a doctor can judge from the marked position on the insertion tube which does not enter the outside of the human body, and the doctor can better judge the condition of the checked diagnosis position by entering the state of the right position or the inclined angle of the camera (with the horizontal plane) at the front part of the insertion tube of the human body.
As shown in fig. 5, in order to facilitate the installation of the seal ring, a seal ring installation groove 314 is provided on the outer peripheral wall of the operating system connection portion 313, the seal ring installation groove 314 is located outside the positioning groove 311, and a seal ring 33 is provided in the seal ring installation groove 314. In order to make the invention and the operation part connecting tube of the operation system form a sealing connection structure, cross infection is prevented.
In order to prevent the bending assembly from being shifted in the process of rotating in the four directions, the number of the axial positioning grooves 311 on the outer peripheral wall of the rear connecting seat 31 is a multiple of 4. The positioning groove 311 is a triangular tooth groove or a rectangular tooth groove. The number of axial detents may be 32, 28, 24, 20, etc. The design has the advantages that: first, the four-direction bending angle of the bending part in front of the endoscope is the bending angle in four directions of the XY axes which are mutually perpendicular, the number of the positioning grooves on the periphery of the rear seat is a multiple of 4, and the 4 grooves which are mutually perpendicular are exactly consistent with the four directions of the bending angle of the bending part in the same way in the four directions of the XY axes. When the bending part assembly is assembled, when any one of the bending angles in four directions is used as the positive upward bending angle of an endoscope product, the positioning screw is screwed, the screw is positioned in any one of the 4 equally divided grooves, and the direction of the bending part bending angle accords with the position of the positive vertical direction of the endoscope product, so that the multiple of 4 equally divided grooves is needed. Secondly, after the colonoscope is inserted into the cavity of the checked person by a doctor, the position of the shot image is determined by a positive camera at the front end, an upward bending angle of a front bending part of the endoscope is adopted (when an operation part of the endoscope is vertical to a horizontal plane, the front end is bent upwards when the operation part is bent upwards), the colonoscope is four-direction bending angles of a cross center line of a bending part in front of an insertion tube, length marks are correspondingly printed on the cross center line of the four-direction bending angles, and a positioning groove which corresponds to the periphery of a rear seat is designed on the cross center line of the insertion tube, wherein the length marks are correspondingly printed on the cross center line of the insertion tube. Although the doctor cannot see the angle or position of the camera of the endoscope in the human body cavity, judgment is performed by the marks (a positioning groove on the rear seat corresponds to the axial center line printed with the marks) printed on the insertion tube of the upward and forward operation part at the rear part of the insertion tube outside the human body. The method is used for judging the azimuth or the direction of the detected surface of the human body cavity. The physician can quickly proceed to the site where diagnosis is desired or to the site of biopsy.
As shown in fig. 5, the taper hole has the advantages that: when the traction spring tube is fixed with the operation part of the rear part, the spring tube is convenient to connect with the related structure of the operation part after a small angle is needed to be outwards, so the traction spring tube is designed into a conical hole. The advantage of the stepped hole design is that when the woven mesh tube at one end of the hose assembly is connected and assembled with the hole of the stepped hole, the woven mesh tube can be connected by soldering or structural adhesive bonding, the operating system connecting portion 313 has a taper hole 3131 and a stepped hole 3132 which are coaxially arranged, and the stepped hole 3132 is located at the inner side of the taper hole 3131.
As shown in fig. 1 and 2, the spring fixing ring 21 includes a traction spring fixing section 213 and a front seat connecting section 214, which are integrated with each other and have a coaxial line, four spring mounting grooves 211 are separately disposed on the inner wall of the traction spring fixing section 213 and along the axial direction thereof, and the front seat connecting section 214 is sleeved on the outer periphery of the spring fixing ring connecting section 231 of the front seat 23.
The upper digestive tract structure of the human body is provided with an esophageal tract spray gate; gastric body and antrum; the pylorus enters the duodenum. The gastroduodenal insertion requires at least three curved lumens. Therefore, the invention is divided into four sections of insertion pipes with different hardness, so that a doctor can provide an endoscope for the upper digestive tract with better insertion pipe performance, and the doctor can insert the upper digestive tract of a human body to diagnose more conveniently. The middle part of the main hose 1 is divided into four sections along the length thereof, the pitch P 11 of the first section of the spring tube 11 is 2.3 mm-3.1 mm, the pitch P 12 of the second section of the spring tube 11 is 2.6 mm-3.3 mm, the pitch P 13 of the third section of the spring tube 11 is 2.9 mm-3.6 mm, the pitch P 14 of the fourth section of the spring tube 11 is 3.3 mm-3.9 mm, and P 11＜P12＜P13＜P14,
The Shore hardness A 1 of the medical polyurethane coating 13 of the first section is 35-39, the Shore hardness A 2 of the medical polyurethane coating 13 of the second section is 48-56, the Shore hardness A 3 of the medical polyurethane coating 13 of the third section is 65-75, the Shore hardness A 4 of the medical polyurethane coating 13 of the fourth section is 78-85, and A 1＜A2＜A3＜A4,
The outer diameter phi of the woven mesh tube 12 is 5.6-10 mm, the weaving angle beta of the woven mesh tube 12 is 38-42 degrees, and the pitch H of the crossing points of the woven mesh tube 12 is 2-3 mm.
The invention is divided into four sections with different hardness, and the following main hoses of the upper gastrointestinal tract lens of specific example 1, example 2 and example 3 can be obtained according to the table 1:
TABLE 1
When the colonoscope is used, the operation part connecting cylinder of the operation component is connected with the rear seat, the radial screw on the operation part connecting cylinder is firstly rotated to be screwed into the positioning groove on the rear seat, and then the fastening nut is screwed, so that the operation part connecting cylinder and the rear seat are tightly fixed into a whole, the looseness of the joint of the rear seat and the operation part connecting cylinder can be effectively prevented, the operation part connecting cylinder cannot rotate left and right, the connection reliability of the operation part connecting cylinder and the rear seat is ensured, the deflection of the bending component in the bending process is further realized, the accuracy of colonoscope insertion is improved, and the pain of a testee is reduced.
The invention also discloses a medical endoscope, which is characterized in that the outer periphery of the end part of the rear connecting seat is provided with the sealing ring which is positioned at the outer side of the axial positioning groove, so that the rear connecting seat is in sealing connection with the operation part connecting cylinder of the operation system through the sealing ring, and the backward structure of the rear connecting part of the insertion tube assembly is also a sealing structure, so that the rear connecting part can be completely soaked in disinfectant for sterilization and disinfection;
And because the inner wall of the spring fixing ring is provided with four spring mounting grooves which are separately arranged along the axial direction of the spring fixing ring, one ends of the four traction springs are respectively arranged in the corresponding spring mounting grooves, so that the welding is convenient, the time and the labor are saved, the assembly efficiency is improved, the positioning welding is carried out on the springs, the springs can be ensured not to be inclined after being welded, and the welding quality and the reliability are ensured.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (6)
1. An insertion tube assembly for an upper enteroscope, comprising:
The main hose (1), main hose (1) includes spring pipe (11) and braided mesh tube (12), braided mesh tube (12) suit is in the periphery of spring pipe (11), main hose (1) includes preceding connecting portion, intermediate part and back connecting portion, spring pipe (11) and braided mesh tube (12) of preceding connecting portion and back connecting portion all weld as an organic wholely, braided mesh tube (12) periphery in intermediate part is equipped with medical polyurethane coating (13), and the periphery of medical polyurethane coating (13) is equipped with medical transparent polyurethane membrane (14);
Traction spring assembly structure (2), traction spring assembly structure (2) include spring retainer plate (21) and four traction springs (22), preceding connecting portion at main hose (1) is established to spring retainer plate (21), and one end of four traction springs (22) is established on spring retainer plate (21) to four traction springs (22) all insert in spring pipe (11), its characterized in that:
The novel flexible pipe connecting device is characterized by further comprising an operating system connecting mechanism (3), wherein the operating system connecting mechanism (3) comprises a rear connecting seat (31) and a fastening nut (32), the rear connecting seat (31) is fixedly connected with a rear connecting part of the main flexible pipe (1), the fastening nut (32) is sleeved on the rear connecting seat (31), an axial positioning groove (311) is formed in the peripheral wall of the rear connecting seat (31) and located on the outer side of the fastening nut (32), four traction springs (22) penetrate out of the rear connecting seat (31), and a sealing ring (33) is arranged on the outer periphery of the end part of the rear connecting seat (31) and located on the outer side of the axial positioning groove (311);
Four spring mounting grooves (211) which are arranged separately are formed in the inner wall of the spring fixing ring (21) along the axial direction of the spring fixing ring, and one ends of the four traction springs (22) are respectively arranged in the corresponding spring mounting grooves (211);
The traction spring assembly structure (2) further comprises a front seat (23), the front seat (23) comprises a spring fixing ring connecting section (231) and a front connecting section (232) which are integrated with each other, the front connecting section (232) is fixedly connected with the front connecting part of the main hose (1), the periphery of the front connecting section (232) is provided with a medical transparent polyurethane film (14), and the spring fixing ring (21) is sleeved on the periphery of the spring fixing ring connecting section (231) and is fixedly connected with the periphery of the spring fixing ring connecting section;
The rear seat (31) is provided with a main hose connecting part (312) and an operating system connecting part (313) which are integrated with each other, the main hose connecting part (312) is fixedly connected with the rear connecting part of the main hose (1), and the periphery of the operating system connecting part (313) is provided with a fastening nut (32) and an axial positioning groove (311);
the number of the axial locating grooves (311) on the peripheral wall of the rear seat (31) is a multiple of 4, and the plurality of axial locating grooves (311) are equally distributed on the rear seat (31), so that the bending parts, which are mutually perpendicular, of the four axial locating grooves and the front connecting part of the main hose (1) are consistent in the four directions of XY axial bending angles.
2. The upper enteroscope insertion tube assembly of claim 1, wherein: the inner hole of the spring fixing ring (21) is provided with a clamp pipe installation channel (212), an included angle formed between a first spring installation groove (2111) and a second spring installation groove (2112) which are arranged on two sides of the clamp pipe installation channel (212) and the central line of the inner hole of the spring fixing ring (21) is 96-100 degrees, and the other two spring installation grooves (211) are uniformly distributed on the inner wall of the spring fixing ring (21) on the outer side of the clamp pipe installation channel (212).
3. The upper enteroscope insertion tube assembly of claim 1, wherein: a sealing ring mounting groove (314) is formed in the peripheral wall of the operating system connecting portion (313), the sealing ring mounting groove (314) is located on the outer side of the positioning groove (311), and a sealing ring (33) is arranged in the sealing ring mounting groove (314).
4. The upper enteroscope insertion tube assembly of claim 1, wherein: the operating system connection portion (313) has a taper hole (3131) and a step hole (3132) arranged coaxially, and the step hole (3132) is located inside the taper hole (3131).
5. The upper enteroscope insertion tube assembly of claim 1, wherein: the spring fixing ring (21) comprises a traction spring fixing section (213) and a front seat connecting section (214) which are integrated with each other and are coaxial, four spring mounting grooves (211) which are separately arranged are formed in the inner wall of the traction spring fixing section (213) along the axial direction of the traction spring fixing section, and the front seat connecting section (214) is sleeved on the periphery of the spring fixing ring connecting section (231) of the front seat (23).
6. The upper enteroscope insertion tube assembly of claim 1, wherein: the middle part of the main hose (1) is divided into four sections along the length of the main hose, the screw pitch P 11 of the spring tube (11) of the first section is 2.3 mm-3.1 mm, the screw pitch P 12 of the spring tube (11) of the second section is 2.6 mm-3.3 mm, the screw pitch P 13 of the spring tube (11) of the third section is 2.9 mm-3.6 mm, the screw pitch P 14 of the spring tube (11) of the fourth section is 3.3 mm-3.9 mm, and P 11＜P12＜P13＜P14,
The Shore hardness A 1 of the medical polyurethane coating (13) of the first section is 35-39, the Shore hardness A 2 of the medical polyurethane coating (13) of the second section is 48-56, the Shore hardness A 3 of the medical polyurethane coating (13) of the third section is 65-75, the Shore hardness A 4 of the medical polyurethane coating (13) of the fourth section is 78-85, and A 1＜A2＜A3＜A4,
The outer diameter phi of the woven mesh tube (12) is 5.6-10 mm, the weaving angle beta of the woven mesh tube (12) is 38-42 degrees, and the pitch H of the intersecting points of the woven mesh tube (12) is 2-3 mm.
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| CN201910815099.3A CN110420006B (en) | 2019-08-30 | 2019-08-30 | Insertion tube assembly of upper digestive tract endoscope |
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| CN201910815099.3A CN110420006B (en) | 2019-08-30 | 2019-08-30 | Insertion tube assembly of upper digestive tract endoscope |
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