CN110584583B - Ureteroscope's insertion tube assembly - Google Patents
Ureteroscope's insertion tube assembly Download PDFInfo
- Publication number
- CN110584583B CN110584583B CN201910816097.6A CN201910816097A CN110584583B CN 110584583 B CN110584583 B CN 110584583B CN 201910816097 A CN201910816097 A CN 201910816097A CN 110584583 B CN110584583 B CN 110584583B
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- Prior art keywords
- spring
- seat
- main hose
- traction
- fixing ring
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- 238000003780 insertion Methods 0.000 title claims abstract description 53
- 230000037431 insertion Effects 0.000 title claims abstract description 53
- 238000007789 sealing Methods 0.000 claims abstract description 25
- 230000002093 peripheral effect Effects 0.000 claims abstract description 7
- 238000005476 soldering Methods 0.000 claims description 22
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 21
- 239000011527 polyurethane coating Substances 0.000 claims description 19
- 229920006264 polyurethane film Polymers 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 238000009941 weaving Methods 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims description 2
- 239000004814 polyurethane Substances 0.000 claims description 2
- 229920002635 polyurethane Polymers 0.000 claims description 2
- 238000005452 bending Methods 0.000 description 15
- 238000003466 welding Methods 0.000 description 9
- 230000002485 urinary effect Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 210000003932 urinary bladder Anatomy 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 206010011409 Cross infection Diseases 0.000 description 3
- 206010029803 Nosocomial infection Diseases 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000001954 sterilising effect Effects 0.000 description 3
- 238000004659 sterilization and disinfection Methods 0.000 description 3
- 210000000626 ureter Anatomy 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 208000006568 Urinary Bladder Calculi Diseases 0.000 description 1
- 208000007097 Urinary Bladder Neoplasms Diseases 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 201000003146 cystitis Diseases 0.000 description 1
- 239000000645 desinfectant Substances 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000003734 kidney Anatomy 0.000 description 1
- 210000004379 membrane Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000004877 mucosa Anatomy 0.000 description 1
- 210000004400 mucous membrane Anatomy 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 208000000143 urethritis Diseases 0.000 description 1
- 208000029584 urinary system neoplasm Diseases 0.000 description 1
- 210000001635 urinary tract Anatomy 0.000 description 1
- 208000019206 urinary tract infection Diseases 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
- A61B1/307—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 urinary organs, e.g. urethroscopes, cystoscopes
-
- 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)
- Biomedical Technology (AREA)
- Public Health (AREA)
- Biophysics (AREA)
- Heart & Thoracic Surgery (AREA)
- Veterinary Medicine (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Optics & Photonics (AREA)
- Pathology (AREA)
- Radiology & Medical Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Hematology (AREA)
- Anesthesiology (AREA)
- Pulmonology (AREA)
- Mechanical Engineering (AREA)
- Urology & Nephrology (AREA)
- Endoscopes (AREA)
Abstract
The invention relates to an insertion tube assembly of a ureteroscope, which comprises a main hose and a traction spring assembly structure, wherein the traction spring assembly structure comprises a spring fixing ring and two traction springs arranged on the spring fixing ring, the spring fixing ring is arranged at a front connecting part of the main hose, and the insertion tube assembly also comprises an operating system connecting mechanism which comprises a rear seat and a fastening nut, the rear seat is connected with a rear connecting part of the main hose, the fastening nut is sleeved on the rear seat, a positioning groove is arranged on the peripheral wall of the rear connecting seat and positioned at 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 positioned at the outer side of the positioning groove; the inner wall of the spring fixing ring is provided with two spring mounting grooves for mounting traction springs along the axial direction of the spring fixing ring, and the main hose is designed into three insertion sections with different soft hardness, so that the requirement of the insertion pipe on the insertability is met, and the soft performance of the insertion pipe is better. The invention is in sealing connection with the operation assembly and can not rotate after being assembled.
Description
Technical Field
The invention relates to an insertion tube assembly, in particular to an insertion tube assembly of a ureteroscope, and belongs to the technical field of medical appliances.
Background
The insertion tube assembly of the ureteroscope is one of the main components of the ureteroscope. The ureteral endoscope can reach the upper section of the ureter and even be inserted into the kidney, so that the ureteral endoscope can treat the upper urinary system calculus without operation and can be easily completed. Meanwhile, the medicine can be used for checking and diagnosing symptoms such as cystitis, urethritis, urinary tract infection, vesical calculus, urinary tract calculus, bladder tumor, urinary tract tumor and the like.
The traditional ureteral endoscope insertion tube is a rigid and inflexible insertion tube of a stainless steel tube hard tube, and sometimes damages the mucous membrane of the inner cavity of the urinary system in the use process, and the defect that the urinary bladder or the ureter is possibly inserted carelessly is overcome.
In order to overcome the defects of the traditional rigid insertion tube, the rigid insertion tube is improved into a soft ureteral endoscope, the insertion tube is required to be twisted and rotated during insertion or examination and diagnosis, the fixing structure at the joint of the main body of the operation part and the insertion tube is unreliable, looseness occurs, and even the insertion performance of an insertion tube assembly of the soft ureteral endoscope in the examination process or the rotation or deflection of the position of an observed image can be influenced.
At present, a ureteral endoscope belongs to a semi-sealed medical flexible endoscope, namely, the head part of an insertion tube assembly and the whole insertion part of a bending part are of a sealing structure, all structures of the tail part of an insertion tube in the backward direction are of unsealed structures, only the front part of the complete endoscope can be sterilized, unsealed structure parts cannot enter sterilizing liquid for sterilization, and therefore, the rear structure cannot be sterilized, so that the problem of cross infection is easy to occur.
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 ureteroscope insertion tube assembly not only can be assembled with the operation assembly without rotation and ensure the tightness after connection between the operation assembly and the operation assembly, but also is convenient for insertion and operation.
In order to achieve the above purpose, the technical scheme of the invention is as follows: an insertion tube assembly of a ureteroscope, 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 two traction springs, the preceding connecting portion at main hose is established to the spring retainer plate, and the one end of two traction springs is established on the spring retainer plate to in the spring pipe was all inserted to two traction springs, 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, two 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;
The traction spring assembly structure further comprises a front seat, the front seat is fixedly connected with the front connecting part of the main hose, the spring fixing ring is fixedly connected with the front seat, two spring mounting grooves are formed in the inner wall of the spring fixing ring and along the axial direction of the spring fixing ring, and one ends of the two traction springs are respectively arranged in the corresponding spring mounting grooves;
the middle part of the main hose is divided into three sections along the length of the main hose, the pitch P 11 of the first section of the spring tube is 1.8 mm-2.6 mm, the pitch P 12 of the second section of the spring tube is 2.3 mm-3.1 mm, the pitch P 13 of the third section of the spring tube is 2.9 mm-3.5 mm, and P 11＜P12＜P13,
The Shore hardness A 1 of the medical polyurethane coating of the first section is 31-35, the Shore hardness A 2 of the medical polyurethane coating of the second section is 50-56, the Shore hardness A 3 of the medical polyurethane coating of the third section is 68-72, and A 1＜A2＜A3,
The outer diameter phi of the woven mesh tube is 3.6-6 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 2-2.8 mm.
In the above technical scheme, the front connection seat includes spring retainer plate linkage segment and the preceding linkage segment as an organic whole each other, preceding linkage segment passes through soldering tin and the preceding connecting portion fixed connection of main hose, and the periphery of preceding linkage segment is equipped with medical transparent polyurethane membrane, spring retainer plate snare dress is in the periphery of spring retainer plate linkage segment and through soldering tin and its fixed connection.
In the above technical scheme, the inner hole of the spring retainer plate is provided with a fitting mounting 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 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 two 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 front seat's spring retainer plate connecting section periphery, and front seat connecting section's periphery is equipped with medical transparent polyurethane film.
In the technical scheme, the traction spring fixing ring and the front seat are both provided with front soldering tin injection holes, and the traction spring fixing ring, the front seat and the front connecting part of the main hose are welded into a whole through soldering tin; the rear seat is provided with a rear soldering tin injection hole, and the rear seat is welded with a rear connecting part of the main hose into a whole through soldering tin.
The invention has the positive effects that: after the ureteroscope insertion tube assembly is adopted, the operation system connecting mechanism comprises the rear connecting seat and the fastening nut, the rear connecting seat is fixedly connected with the rear connecting part of the main hose, the fastening nut is sleeved on the rear connecting seat, the outer peripheral wall of the rear connecting seat is provided with the axial positioning groove which is positioned at the outer side of the fastening nut, and the two traction springs penetrate out of the rear connecting seat, so that the operation part connecting cylinder of the operation component is connected with the rear connecting seat, the radial screw on the operation part connecting cylinder is firstly rotated to be screwed into the positioning groove on the rear connecting seat, the fastening nut is then screwed, the operation part connecting cylinder and the rear connecting seat are tightly fixed into a whole, thus the joint of the rear connecting seat and the operation part connecting cylinder is effectively prevented from loosening, the operation part connecting cylinder does not rotate left and right, the reliability of the connection of the operation part connecting cylinder and the operation part connecting cylinder is ensured, the bending component is prevented from shifting in the bending process, the accuracy of inserting the colonoscope is improved, and the pain of a testee 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;
The traction spring assembly structure further comprises a front seat, the front seat is fixedly connected with the front connecting part of the main hose, the spring fixing ring is fixedly connected with the front seat, two spring mounting grooves are formed in the inner wall of the spring fixing ring and along the axial direction of the spring fixing ring, one ends of the two traction springs are respectively arranged in the corresponding spring mounting grooves, and as the outer diameter size of the main hose is thinner than that of the main hose of the colonoscope, a bending part connected with the traction spring assembly can only bend in two directions, the effect of 220-degree bending and 100-degree bending of the upper bending angle of the ureteral endoscope can be achieved, diseases in urinary bladder and other systems can be observed and diagnosed in a larger range through the bending angle of the front end;
And because the middle part of the main hose is divided into three sections along the length thereof, the screw pitch P 11 of the spring tube of the first section is 1.8 mm-2.6 mm, the screw pitch P 12 of the spring tube of the second section is 2.3 mm-3.1 mm, the screw pitch P 13 of the spring tube of the third section is 2.9 mm-3.5 mm, and P 11＜P12＜P13,
The Shore hardness A 1 of the medical polyurethane coating of the first section is 31-35, the Shore hardness A 2 of the medical polyurethane coating of the second section is 50-56, the Shore hardness A 3 of the medical polyurethane coating of the third section is 68-72, and A 1＜A2＜A3,
The external diameter phi of the woven mesh tube is 3.6-6 mm, the weaving angle beta of the woven mesh tube is 38-42 degrees, the pitch H of the crossing points of the woven mesh tube is 2-2.8 mm, in order to prevent the rigid insertion tube from damaging the inner cavity mucosa of the urinary system in the process of being inserted into a patient, and even the bladder or ureter can be inserted into the patient in the process of checking and diagnosing, the main hose is designed into three sections with different soft hardness insertion sections, so that the hardness requirement of the insertion tube is met, the soft performance of the insertion tube is better, the insertion performance of the insertion tube into a human body in clinic is better, meanwhile, the pain of the checked person is further relieved, when the front face touches the inner cavity surface of the urinary system, even if the touching force is not large, the camera at the front end of the insertion tube is naturally bent along with the 1 st section of the insertion tube, and the inner cavity in the urinary system such as the urinary system can not be inserted into the bladder.
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 ureteroscope insertion tube assembly 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 two traction springs 22, the spring fixing ring 21 is arranged at the front connecting part of the main hose 1, one ends of the two traction springs 22 are arranged on the spring fixing ring 21, and the two traction springs 22 are inserted into the spring tube 11,
The operation system connecting mechanism 3 comprises a rear seat 31 and a fastening nut 32, wherein the rear seat 31 is fixedly connected with a 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 positioned at the outer side of the fastening nut 32, two traction springs 22 penetrate out of the rear seat 31, a sealing ring 33 is arranged at the outer periphery of the end part of the rear seat 31 and positioned at 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;
The traction spring assembly structure 2 further comprises a front seat 23, the front seat 23 is fixedly connected with the front connecting part of the main hose 1, the spring fixing ring 21 is fixedly connected with the front seat 23, two spring mounting grooves 211 are formed in the inner wall of the spring fixing ring 21 along the axial direction of the inner wall of the spring fixing ring, and one ends of the two traction springs 22 are respectively arranged in the corresponding spring mounting grooves 211;
The middle part of the main hose 1 is divided into three sections along the length thereof, the pitch P 11 of the first section of the spring tube 11 is 1.8 mm-2.6 mm, the pitch P 12 of the second section of the spring tube 11 is 2.3 mm-3.1 mm, the pitch P 13 of the third section of the spring tube 11 is 2.9 mm-3.5 mm, and P 11＜P12＜P13,
The Shore hardness A 1 of the medical polyurethane coating 13 of the first section is 31-35, the Shore hardness A 2 of the medical polyurethane coating 13 of the second section is 50-56, the Shore hardness A 3 of the medical polyurethane coating 13 of the third section is 68-72, and A 1＜A2＜A3,
The outer diameter phi of the woven mesh tube 12 is 3.6-6 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 2-2.8 mm.
The ureteroscope of the invention is divided into a long lens and a short lens, and the length of the long lens of the ureteroscope is 400 mm-680 mm; and the length of the short lens of the ureteral endoscope is 330 mm-460 mm. 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.
As shown in fig. 1 and 2, for convenience, the front seat 23 includes a spring fixing ring connection section 231 and a front connection section 232, which are integrated with each other, the front connection section 232 is fixedly connected with the front connection section of the main hose 1 through soldering tin, and the outer periphery of the front connection section 232 is provided with a medical transparent polyurethane film 14, and the spring fixing ring 21 is sleeved on the outer periphery of the spring fixing ring connection section 231 and is fixedly connected with the same through soldering tin.
As shown in fig. 4, in order to facilitate assembly of the components of the contents such as the pipe pliers, the inner hole of the spring retainer 21 has a fitting mounting passage 212. For example, the fitting mounting passage 212 of the spring retainer 21 is a mounting passage for inserting a clamp pipe, a camera cable, a light guide, a gas pipe, and the like.
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.
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 enable the medical endoscope and the operation part connecting tube of the operation system to form a sealing connection structure, the medical endoscope can effectively prevent internal bacteria from overflowing after the medical endoscope is sterilized, and cross infection is prevented.
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. 2, for convenience, the spring fixing ring is connected with the front seat, so that the structure is more reasonable, 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 have a coaxial line, two spring mounting grooves 211 which are separately arranged are arranged on the inner wall of the traction spring fixing section 213 and along the axial direction of the traction spring fixing section, the front seat connecting section 214 is sleeved on the periphery of the spring fixing ring connecting section 231 of the front seat 23, and the periphery of the front seat connecting section 214 is provided with a medical transparent polyurethane film 14.
In order to facilitate the welding of the spring fixing ring and the front connecting part of the front seat and the main hose into a whole, the traction spring fixing ring 22 and the front seat 23 are provided with front soldering tin filling holes, and the traction spring fixing ring 22, the front seat 23 and the front connecting part of the main hose 1 are welded into a whole through soldering tin; in order to facilitate the welding of the rear seat and the front connecting part of the main hose, the rear seat 31 is provided with a rear soldering tin injection hole, and the rear seat 31 is welded with the rear connecting part of the main hose 1 into a whole through soldering tin. And in the specific welding process, soldering tin is injected into the forward soldering tin injection hole and the rear soldering tin injection hole, so that the rapid positioning welding is convenient.
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.
The invention is divided into three sections with different hardness, and the following main hoses of ureteroscope of specific example 1, example 2 and example 3 can be obtained according to table 1:
TABLE 1
The invention has the advantages that: the operation part connecting cylinder of the operation assembly 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, loosening 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 assembly in the bending process is further realized, the accuracy of inserting a colonoscope is improved, and the pain of a testee is reduced;
The rear connecting seat is in sealing connection with the operation part connecting cylinder of the operation system through the sealing ring, so that the rear connecting part of the insertion tube assembly is also in a sealing structure, and can be completely soaked in sterilizing liquid for sterilization and disinfection;
According to the invention, 2 traction spring tubes are adopted, 2 spring tubes are reduced, on one hand, the space of the inner diameter of an insertion tube is mainly increased, and the assembly of content parts such as a clamp tube is facilitated, on the other hand, the bending parts connected with the traction spring assembly can only bend angles in two directions, for example, after the device of the traction spring tube assembly is adopted, the upper bending angle of the ureteral endoscope can be bent to 220 degrees and the lower bending angle of 100 degrees through a steel wire rope (the steel wire rope is a part for pulling the bending part at the front end of an endoscope) in the traction spring tube, diseases in urinary systems such as a bladder can be observed and diagnosed in a larger range through the bending angle at the front end, and the two traction springs are respectively welded in spring mounting grooves corresponding to the spring fixing rings, so that the welding is convenient, time and labor are saved, the assembly efficiency is improved, and the positioning welding of the springs can be ensured, the inclination of the springs after the welding can be avoided, and the welding quality and the reliability are ensured;
The main hose is designed into three insertion sections with different soft and hard degrees, so that the hardness requirement of the insertion tube is met, the soft performance of the insertion tube is better, the insertion performance of the insertion tube into a human body is better in clinical use, meanwhile, the pain of a tested person is further relieved, when the front face touches the inner cavity surface of the bladder, even if the touching force is not large, the camera at the front end of the insertion tube is naturally bent along with the 1 st section of the insertion tube, and the inner cavity in the urinary system such as the bladder is not broken.
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 (5)
1. An insertion tube assembly of a ureteroscope, 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 two traction springs (22), preceding connecting portion at main hose (1) is established to spring retainer plate (21), and one end of two traction springs (22) is established on spring retainer plate (21) to in spring pipe (11) are all inserted to two traction springs (22), 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), two 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);
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), the periphery of the operating system connecting part (313) is provided with a fastening nut (32) and an axial positioning groove (311), the operating system connecting part (313) is provided with a taper hole (3131) and a step hole (3132) which are coaxially arranged, and the step hole (3132) is positioned at the inner side of the taper hole (3131);
The traction spring assembly structure (2) further comprises a front connecting seat (23), the front connecting seat (23) is fixedly connected with the front connecting part of the main hose (1), the spring fixing ring (21) is fixedly connected with the front connecting seat (23), two spring mounting grooves (211) are formed in the inner wall of the spring fixing ring (21) along the axial direction of the inner wall of the spring fixing ring, one ends of the two traction springs (22) are respectively arranged in the corresponding spring mounting grooves (211), and an inner hole of the spring fixing ring (21) is provided with an accessory mounting channel (212);
The middle part of the main hose (1) is divided into three sections along the length of the main hose, the screw pitch P 11 of the spring tube (11) of the first section is 1.8 mm-2.6 mm, the screw pitch P 12 of the spring tube (11) of the second section is 2.3 mm-3.1 mm, the screw pitch P 13 of the spring tube (11) of the third section is 2.9 mm-3.5 mm, and P 11＜P12＜P13,
The Shore hardness A 1 of the medical polyurethane coating (13) of the first section is 31-35, the Shore hardness A 2 of the medical polyurethane coating (13) of the second section is 50-56, the Shore hardness A 3 of the medical polyurethane coating (13) of the third section is 68-72, and A 1＜A2＜A3,
The outer diameter phi of the woven mesh tube (12) is 3.6-6 mm, the weaving angle beta of the woven mesh tube (12) is 38-42 degrees, and the crossing point pitch H of the woven mesh tube (12) is 2-2.8 mm.
2. The ureteroscope insertion tube assembly according to claim 1, characterized in that: the front connecting 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 a front connecting part of the main hose (1) through soldering tin, 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 through soldering tin.
3. The ureteroscope insertion tube assembly according to claim 1, characterized in that: 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 ureteroscope insertion tube assembly according to claim 2, characterized in that: the spring retainer plate (21) is including mutual as an organic whole and have traction spring fixed section (213) and front seat linkage segment (214) of coaxial line, be equipped with two separately arranged spring mounting groove (211) on the inner wall of traction spring fixed section (213) and along its axial direction, front seat linkage segment (214) suit is at spring retainer plate linkage segment (231) periphery of front seat (23), and the periphery of front seat linkage segment (214) is equipped with medical transparent polyurethane film (14).
5. The ureteroscope insertion tube assembly according to claim 1, characterized in that: the traction spring fixing ring (22) and the front seat (23) are provided with front soldering tin injection holes, and the traction spring fixing ring (22), the front seat (23) and the front connecting part of the main hose (1) are welded into a whole through soldering tin; the rear connecting seat (31) is provided with a rear soldering tin injection hole, and the rear connecting seat (31) is welded with the rear connecting part of the main hose (1) into a whole through soldering tin.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910816097.6A CN110584583B (en) | 2019-08-30 | 2019-08-30 | Ureteroscope's insertion tube assembly |
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| CN201910816097.6A CN110584583B (en) | 2019-08-30 | 2019-08-30 | Ureteroscope's insertion tube assembly |
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| CN110584583B true CN110584583B (en) | 2024-07-12 |
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| CN111388843A (en) * | 2020-03-25 | 2020-07-10 | 南通伊诺精密塑胶导管有限公司 | Controllable elbow conduit |
| CN117357053B (en) * | 2023-12-06 | 2024-03-29 | 广东埃纳生医学科技有限公司 | Handheld seminal vesicle for urethral diagnosis |
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