CN213551993U

CN213551993U - Bending non-deforming clamp tube of medical flexible endoscope

Info

Publication number: CN213551993U
Application number: CN202022196847.5U
Authority: CN
Inventors: 谢民政; 谢梦蕾; 史健
Original assignee: Changzhou Yanshun Optoelectronics Technology Co ltd
Current assignee: Changzhou Yanshun Optoelectronics Technology Co ltd
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2021-06-29
Anticipated expiration: 2030-09-29

Abstract

The utility model relates to a crooked non-deformable's of medical soft endoscope pincers pipeline, its innovation point lies in: including polytetrafluoroethylene hose and spring, polytetrafluoroethylene hose's one end has the flexion rather than each other as an organic whole, be equipped with spiral helicine spring groove on the outer wall of flexion, the spring is established in the spring groove of flexion. The utility model discloses make things convenient for endoscope surgical instruments such as biopsy forceps, get the stone blue to insert and can guarantee to pass through smoothly to and hole pore wall wearability is high, long service life, low in production cost, be convenient for wash and disinfect, can't hide the bacterium in the passageway, and can effectively avoid cross infection.

Description

Bending non-deforming clamp tube of medical flexible endoscope

Technical Field

The utility model relates to a forceps tube, in particular to a bending non-deformation forceps tube of a medical soft endoscope, belonging to the technical field of medical instruments.

Background

The forceps tube of a medical flexible endoscope is an important part of an endoscope in medical instruments. It is used for biopsy sampling in human body to remove foreign body, polyp, etc. Can be operated freely, and the patient can be prevented from unnecessary pain, so the method has positive significance in diagnosing and treating the stomach, the intestine and the duodenum.

The structure of the forceps tube of the original medical flexible endoscope is a polytetrafluoroethylene tube made of three layers of thin-wall expanded materials, the inner layer is a high-density expanded PTFE hose, the outer layer is a high-density expanded polytetrafluoroethylene winding tape or an expanded polytetrafluoroethylene tube which is wound by a polytetrafluoroethylene high-density film tape and hermetically covers the inner layer, and the middle layer is an adhesive which is used for bonding the inner-layer expanded polytetrafluoroethylene hose and the outer-layer polytetrafluoroethylene film tape into a whole. The main defects of the expanded polytetrafluoroethylene foam tube are that the expanded polytetrafluoroethylene foam tube is soft in texture and rough in surface, and micro pores are formed to easily hide bacteria or viruses, so that great difficulty is brought to cleaning and disinfection, or the cleaning and disinfection are not up to standard, and cross infection is easily caused; secondly, the polytetrafluoroethylene foam tube which is soaked in disinfectant for sterilization or disinfection is not more wear-resistant, when biopsy forceps and a stone taking basket support surgical instruments are inserted from the forceps tube of the endoscope, the wall surfaces of inner holes of the three layers of forceps tube are scraped for many times to form a place where bacteria can be hidden and viruses, the forceps tube cannot be cleaned and disinfected, and cross infection is easy to occur; some of the surgical instruments are punctured into holes when the related surgical instruments are inserted, so that the endoscope is seriously damaged and cannot be used, great economic loss is caused, and the maintenance cost is increased; thirdly, in order to ensure the bonding strength between the inner layer hose and the outer layer hose and the sealing requirement of the hose wall, the pipeline clamping pipe with the structure needs to be added with various production processes, not only needs to be added with various auxiliary materials and has high process cost, but also needs to be provided with a plurality of production personnel and has high labor cost.

Disclosure of Invention

The utility model aims at: the forceps tube which is convenient for inserting of biopsy forceps, stone blue and other endoscopic surgical instruments, has the advantages of low smooth friction coefficient of the inner hole wall, high wear resistance, low production cost, convenient cleaning and disinfection, incapability of hiding bacteria in the channel and capability of effectively avoiding cross infection and is not deformed when being bent is provided.

In order to achieve the above purpose, the technical scheme of the utility model is that: the innovation point of the non-deformable bending forceps channel tube of the medical soft endoscope is that: including polytetrafluoroethylene hose and spring, polytetrafluoroethylene hose's one end has the flexion rather than each other as an organic whole, be equipped with spiral helicine spring groove on the outer wall of flexion, the spring is established in the spring groove of flexion.

In the technical scheme, the spring is arranged in the spring groove of the bending part and is combined with the bending part into a whole through the fluororubber adhesive.

In the technical scheme, the inner diameter of the polytetrafluoroethylene hose is ¢ 0.8- ¢ 5.50.50 mm, the wall thickness d is 0.13-0.55 mm, and the total length L is 380-1850 mm.

In the technical scheme, the outer wall of the bending part is provided with a circular-tooth-shaped spiral spring slot with a circular thread, the length L1 of the spring slot is 90 mm-200 mm, the tooth angle alpha of the spring slot is 30-60 degrees, the thread pitch P of the spring slot is 0.8 mm-1.5 mm, and the shape of the slot bottom of the spring slot is R-shaped.

In the technical scheme, the hardness of the polytetrafluoroethylene hose is controlled within the range of 50D Shore to 70D Shore.

In the technical scheme, the inner diameter of the spring is phi 1.0 mm-phi 5.50mm, the length L2 is 90 mm-200 mm, and the screw pitch P1 of the spring is 0.8 mm-1.5 mm.

In the technical scheme, the spring is formed by winding a steel wire with a square section.

In the above technical solution, the spring includes a front section and a rear section that are integrated with each other, the front section is formed by winding a round-section steel wire, and the rear section is formed by winding a square-section steel wire.

The utility model discloses the positive effect who has is: after the non-deformable forceps tube of the medical flexible endoscope is adopted, the utility model comprises a polytetrafluoroethylene hose and a spring, one end of the polytetrafluoroethylene hose is provided with a bending part which is mutually integrated with the polytetrafluoroethylene hose, the outer wall of the bending part is provided with a spiral spring groove, and the spring is arranged in the spring groove of the bending part;

the utility model discloses a raw and other materials of pincers way pipe are with low costs and low in production cost, consequently, cost reduction is a lot of, because the utility model discloses a body of pincers way pipe is the polytetrafluoroethylene hose, and its pore wall surface is very smooth, and is very wear-resisting moreover, and the doctor uses the endoscope in-process, can easily insert relevant medical instrument and get into the human body and carry out minimal access surgery, has effectively alleviateed the diagnostic working strength of inspection, and it has excellent chemical stability, and strong acid resistance, strong base accord with the cleaning and disinfection requirement of medical washing antiseptic solution completely. Because the bending part is provided with the spring, the bending part has the advantages that: firstly, the bending resistance is high, the bending angles of the upper, lower, left and right parts are not deformed when reaching the maximum 260 degrees, and the technical requirement of the roundness of the bending angles is still kept, so that the biopsy forceps, the lithopone and other endoscopic surgical instruments used in clinic can be easily inserted into the inner cavity of the human body through the endoscope to carry out minimally invasive surgery; secondly, the wear resistance is high, when surgical instruments related to the medical flexible endoscope are inserted and used, the friction force is very small, the surface of the inner hole of the forceps tube is effectively protected from being inserted and damaged, the forceps tube has a smooth and flat surface, and when the endoscope is cleaned and disinfected, small cell tissues, garbage and hidden bacteria or viruses in the inner hole of the forceps tube contacting liquid in a human body inner cavity can be effectively cleaned; thirdly, the medical endoscope disinfectant has good acid and alkali resistance, can resist the long-time soaking and disinfection of the medical endoscope disinfectant, can withstand repeated disinfection in a specified time period, can withstand repeated use when operating an endoscope bend angle without being damaged, and has stable and reliable quality, long service life and low use cost.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a second embodiment of the present invention;

FIG. 3 is a schematic structural view of the polytetrafluoroethylene hose of the present invention;

FIG. 4 is a schematic view of the spring of FIG. 1;

fig. 5 is a schematic view of the structure of the spring in fig. 2.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples, but is not limited thereto.

As shown in fig. 1, 2, 3, 4 and 5, the non-deformable bending forceps tube of the medical flexible endoscope comprises a polytetrafluoroethylene hose 1 and a spring 2, wherein one end of the polytetrafluoroethylene hose 1 is provided with a bending part 11 integrated with the polytetrafluoroethylene hose, a spiral spring groove 12 is arranged on the outer wall of the bending part 11, and the spring 2 is arranged in the spring groove 12 of the bending part 11. The bending invariant effect of the spring combination section of the polytetrafluoroethylene hose provided with the spiral spring part is better, the unidirectional bending angle is 180 degrees or 260 degrees, the tolerance of the roundness is less than or equal to 0.05mm, and the external diameter size of instruments used for endoscope channels such as biopsy forceps and the like is less than 0.2mm of the pore size of the forceps channel, so that the instruments of the related endoscope can smoothly enter a human body through the pore size of the forceps channel tube to carry out biopsy or minimally invasive surgery.

As shown in fig. 1 and 2, in order to secure the bonding strength between the spring and the teflon hose 1 and prevent the spring from falling off, the spring 2 is provided in a spring groove of the bent portion 11 and the spring 2 is integrated with the bent portion 11 by the fluororubber adhesive 3. The outer diameter of a bonding protective layer formed after the fluororubber adhesive on the periphery of the spring 2 is cured is equal to that of the polytetrafluoroethylene hose 1, and the viscosity of the fluororubber adhesive before curing is 2-3.6 mpa.s.

As shown in fig. 1, 2 and 3, further, the polytetrafluoroethylene hose 1 of the present invention has an inner diameter of ¢ 0.8- ¢ 5.50.50 mm, a wall thickness d of 0.13-0.55 mm, and a total length L of 380-1850 mm. The clamp tube of the utility model can be used with other medical soft endoscopes such as gastroscope, enteroscope or duodenoscope.

As shown in fig. 3, a circular-thread spiral spring groove 12 is provided on an outer wall of the curved portion 11, a length L1 of the spring groove 12 is 90mm to 200mm, a thread angle α of the spring groove 12 is 30 ° to 60 °, a pitch P of the spring groove 12 is 0.8mm to 1.5mm, and a groove bottom shape of the spring groove 12 is R-shaped. The single-side depth w of the spiral spring groove 12 of the bending part 11 is more than or equal to 1.1 times of the diameter of the spring steel wire. (note: the wall thickness of the single side of the clamping pipeline is more than or equal to 1.6 times of the diameter of the spring steel wire), so that the design of the spring and the assembly of the polytetrafluoroethylene hose are ensured, and the bottom of the thread groove and the inner hole wall are designed to have certain thicknesses.

Further, polytetrafluoroethylene hose 1's hardness control is in shao shi 50D ~ shao shi 70D within range, like this polytetrafluoroethylene hose 1 neither is too hard, can not too soft again, and compressive strength is high, the wearability is good, bending property is good.

Spring 2 is formed by stainless steel wire winding, spring 2's internal diameter size is phi 1.0mm ~ phi 5.50mm, and length L2 is 90mm ~200mm, and the pitch P1 of spring is 0.8mm ~1.5 mm. Therefore, when the bending part 11 is bent up, down, left and right, the bending angle is not deformed when the bending angle is bent to the maximum 260 degrees, and the technical requirement of the roundness is still kept, so that the endoscope surgical instruments such as biopsy forceps and sapphire taking instruments used in clinic can be easily inserted into the inner cavity of the human body and smoothly enter the inner cavity of the human body through the bending part of the endoscope to carry out minimally invasive surgery.

As shown in fig. 4, spring 2 is formed by the steel wire of square cross section coiling, that is because the spring 2 winding of square cross section is behind the flexion, and the compressive strength of the pipe wall of the elbow of the forceps channel is higher a bit, has further improved the effect of the indeformable after the bending.

As shown in fig. 5, the spring 2 includes a front section 21 and a rear section 22 which are integrated with each other, the front section 21 is formed by winding a round-section wire, and the rear section 22 is formed by winding a square-section wire. That is, the steel wire with two different cross sections is wound on 1 steel wire to prepare, the advantage 1) is that the rear section 22 of the spring 2 adopts the spring winding with the square cross section to be higher than the former, 2) the front section 21 of the spring 2 adopts the steel wire with the circular cross section, namely, the bending property of the forceps tube of the front section spring section is softer than that of the forceps tube of the rear section adopting the rear section with the square cross section steel wire, so the bending angle effect of the whole bending section is better.

The utility model has the advantages of low cost of raw materials and low production cost, therefore, the cost is greatly reduced, because the body of the forceps tube is the polytetrafluoroethylene hose, the surface of the hole wall is very smooth and wear-resistant, when a doctor uses the endoscope, the forceps tube can be easily inserted into the relevant medical apparatus to enter the human body for minimally invasive surgery, the work intensity of examination and diagnosis is effectively reduced, the forceps tube has excellent chemical stability, strong acid and strong alkali resistance, and completely meets the cleaning and disinfection requirements of medical cleaning and disinfection liquid, in addition, the polytetrafluoroethylene hose (PTFE) has very low friction factor, is a good antifriction and self-lubricating material, the static friction factor is less than the dynamic friction factor (the lower friction factor: the friction factor is generally less than or equal to 0.04), therefore, the forceps tube used for manufacturing the medical soft endoscope has smooth inner and outer channels, the resistance is small, the friction is small when inserting, the smooth advantage of inner hole wall, through endoscope surgical instruments such as experimental biopsy forceps insert in the clamp way tube hole, can not damage for tens of thousands of times. Because the bending part is provided with the spring, the bending part has the advantages that: firstly, the bending resistance is high, the bending angles of the upper, lower, left and right parts are not deformed when reaching the maximum 260 degrees, and the technical requirement of the roundness of the bending angles is still kept, so that the biopsy forceps, the lithopone and other endoscopic surgical instruments used in clinic can be easily inserted into the inner cavity of the human body through the endoscope to carry out minimally invasive surgery; secondly, the wear resistance is high, when surgical instruments related to the medical flexible endoscope are inserted and used, the friction force is very small, the surface of the inner hole of the forceps tube is effectively protected from being inserted and damaged, the forceps tube has a smooth and flat surface, and when the endoscope is cleaned and disinfected, small cell tissues, garbage and hidden bacteria or viruses in the inner hole of the forceps tube contacting liquid in a human body inner cavity can be effectively cleaned; thirdly, the medical endoscope disinfectant has good acid and alkali resistance, can resist the long-time soaking and disinfection of the medical endoscope disinfectant, can withstand repeated disinfection in a specified time period, can withstand repeated use when operating an endoscope bend angle without being damaged, and has stable and reliable quality, long service life and low use cost.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A bending non-deformation forceps channel pipe of a medical soft endoscope is characterized in that: including polytetrafluoroethylene hose (1) and spring (2), the one end of polytetrafluoroethylene hose (1) has flexion (11) rather than each other as an organic whole, be equipped with spiral helicine spring groove (12) on the outer wall of flexion (11), establish in spring groove (12) of flexion (11) spring (2).

2. The bending non-deformable channel tube for a medical soft endoscope according to claim 1, characterized in that: the spring (2) is arranged in a spring groove of the bending part (11) and the spring (2) and the bending part (11) are combined into a whole through the fluororubber adhesive (3).

3. The bending non-deformable channel tube for a medical soft endoscope according to claim 1, characterized in that: the inner diameter of the polytetrafluoroethylene hose (1) is ¢ 0.8.8- ¢ 5.50.50 mm, the wall thickness d is 0.13-0.55 mm, and the total length L is 380-1850 mm.

4. The bending non-deformable channel tube for a medical soft endoscope according to claim 1, characterized in that: the outer wall of the bending portion (11) is provided with a round-tooth-shaped spiral spring groove (12) with round threads, the length L1 of the spring groove (12) is 90-200 mm, the tooth angle alpha of the spring groove (12) is 30-60 degrees, the thread pitch P of the spring groove (12) is 0.8-1.5 mm, and the shape of the groove bottom of the spring groove (12) is R-shaped.

5. The bending non-deformable channel tube for a medical soft endoscope according to claim 1, characterized in that: the hardness of the polytetrafluoroethylene hose (1) is controlled within the range of 50D Shore to 70D Shore.

6. The bending non-deformable channel tube for a medical soft endoscope according to claim 1, characterized in that: the inner diameter of the spring (2) is phi 1.0 mm-phi 5.50mm, the length L2 is 90 mm-200 mm, and the pitch P1 of the spring is 0.8 mm-1.5 mm.

7. The bending non-deformable channel tube for a medical soft endoscope according to claim 1, characterized in that: the spring (2) is formed by winding a steel wire with a square section.

8. The bending non-deformable channel tube for a medical soft endoscope according to claim 1, characterized in that: the spring (2) comprises a front section (21) and a rear section (22) which are integrated with each other, the front section (21) is formed by winding steel wires with circular cross sections, and the rear section (22) is formed by winding steel wires with square cross sections.