Clamp channel pipe assembly for upper digestive tract endoscope

Abstract

The forceps channel pipe assembly comprises a main pipe body, a front connector and a rear connector, a second annular groove is formed in the peripheral side face of the left end of the front connector, a third annular groove is formed in the peripheral side face of the right end of the front connector, a fourth annular groove is formed in the peripheral side face of the right end of the rear connector, and a threaded structure is arranged on the peripheral side face of the left end of the rear connector. Pipe head pressing assemblies are arranged at the left end and the right end of the main pipe body respectively, the left end of the front connector is fixedly arranged at the right end of the main pipe body in an inserted and glued mode through the pipe head pressing assemblies, and the right end of the rear connector is fixedly arranged at the left end of the main pipe body in an inserted and glued mode through the pipe head pressing assemblies. The connection firmness of the clamp channel pipe assembly, the camera seat and the clamp channel socket three-way part of the upper digestive tract endoscope handle operation part and the connection firmness of the front joint and the rear joint at the end part of the main pipe body are obviously improved; the probability of cracking of adhesive layers at the joint positions between the main tube body and the camera seat and between the main tube body and the upper digestive tract endoscope handle operation part pincer channel insertion opening three-way part when the main tube body falls accidentally or is impacted by external force is effectively avoided or reduced.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a forceps tube assembly for an upper gastrointestinal endoscope. Background Technology

[0002] The forceps cannula of a flexible medical endoscope is a key component of the endoscope; it is a small, long, open channel. Medical instruments are inserted through the forceps cannula of the flexible medical endoscope into the body cavity to reach the lesion site, and to perform surgical procedures such as biopsies, removal of foreign bodies, and polyps.

[0003] The upper gastrointestinal endoscope forceps tube is one type of endoscope forceps tube. To improve the ease of connection between the front end of the upper gastrointestinal endoscope forceps tube and the endoscope camera, as well as the ease of connection between the rear end of the upper gastrointestinal endoscope forceps tube and the tee fitting at the handle of the upper gastrointestinal endoscope, upper gastrointestinal endoscope forceps tube assemblies have also appeared on the market. For example... Figure 1As shown, an upper gastrointestinal endoscope forceps tube assembly includes a main body 1, with a bent portion 2 at the right end of the main body 1. A rear connector B is inserted into and glued to the left end of the main body 1, and a front connector A is interference-fitted to the right end of the main body 1 via a tapered plug at the left end. In use, the right end (corresponding to the front end) of this upper gastrointestinal endoscope forceps tube assembly is inserted into and glued to the camera mount via the end of the front connector A that protrudes from the right end of the main body 1, and the left end (corresponding to the rear end) is inserted into and glued to the tee fitting of the forceps tube in the handle operating section of the upper gastrointestinal endoscope via the end of the rear connector B that protrudes from the left end of the main body 1. The problems with the upper gastrointestinal endoscope forceps tube assembly of this structure are as follows: (1) The right end of the front connector A is inserted and glued to the camera mount, and the left end of the rear connector B is inserted and glued to the three-way fitting of the forceps tube in the handle operating part of the upper gastrointestinal endoscope. When the upper gastrointestinal endoscope is accidentally dropped or subjected to external impact, the adhesive layer between the front connector A and the camera mount is prone to cracking. Similarly, the adhesive layer between the rear connector B and the three-way fitting of the forceps tube in the handle operating part is also prone to cracking. This can easily cause air leakage when the forceps tube assembly is used, and in severe cases, it can also cause damage to the camera and the upper gastrointestinal endoscope. (1) The handle operation part of the upper gastrointestinal endoscope has a detachment from the main body, which seriously affects the examination process of the upper gastrointestinal endoscope; (2) The front connector A is fixed to the right end of the main body 1 by interference fit of the tapered plug on the left end. As the number of bends of the bending part 2 increases, the front connector A is easy to detach from the right end of the main body 1. In addition, the inner diameter of the right port of the main body 1 gradually increases irreversibly with the number of uses, which makes the front connector A not firmly inserted at the right end of the main body 1, thus affecting the normal use of the upper gastrointestinal endoscope and also increasing the scrap rate of the main body 1. Therefore, this utility model proposes a clamp tube assembly for the upper gastrointestinal endoscope in order to solve the above technical problems. Summary of the Invention

[0004] The purpose of this utility model is to overcome the defects existing in the prior art and provide a forceps tube assembly for an upper gastrointestinal endoscope. When assembled with a camera, the right end of the front connector is inserted into the mounting hole of the camera mount and fixedly connected to the annular groove on the right end of the front connector by the tapered screw on the camera mount. The left end of the rear connector is screwed and fixedly connected to the forceps tube insertion tee of the handle operating part of the upper gastrointestinal endoscope. Compared with the insertion and adhesive fixing method of the forceps tube assembly to the camera mount or the forceps tube insertion tee of the handle operating part of the upper gastrointestinal endoscope, the connection firmness of the forceps tube assembly to the camera mount and the forceps tube insertion tee of the handle operating part of the upper gastrointestinal endoscope is significantly improved. The tube head clamping components located at both ends of the main tube significantly improve the connection strength of the front and rear connectors at the ends of the main tube. This effectively avoids or reduces the likelihood of cracking of the adhesive layer between the front connector and the camera mount, and between the rear connector and the end of the main tube and the tee fitting of the handle operating part of the upper gastrointestinal endoscope, when the endoscope forceps tube assembly is accidentally dropped or subjected to external impact. This ensures good and durable sealing of the upper gastrointestinal endoscope forceps tube assembly during use, while also improving the safety of the upper gastrointestinal endoscope forceps tube assembly and extending its overall service life. The overall structural design is ingenious and reasonable, with high feasibility for manufacturing and implementation, and strong practicality.

[0005] To achieve the above objectives, the technical solution of this utility model is to design a forceps tube assembly for an upper gastrointestinal endoscope, including a main body, a front connector, and a rear connector. The right end of the main body is provided with a bent portion. The outer peripheral side of the left end of the front connector is provided with an annular groove II and the outer peripheral side of the right end is provided with an annular groove III. The outer peripheral side of the right end of the rear connector is provided with an annular groove IV and the outer peripheral side of the left end is provided with a threaded structure. The left and right ends of the main body are respectively provided with tube head clamping components. The left end of the front connector is glued to the right end of the main body by inserting the corresponding tube head clamping component. The right end of the rear connector is glued to the left end of the main body by inserting the corresponding tube head clamping component.

[0006] This utility model discloses a forceps tube assembly for an upper gastrointestinal endoscope. When assembled with a camera, the right end of the front connector is inserted into the mounting hole of the camera mount and fixedly connected to the annular groove on the right end of the front connector using a tapered screw on the camera mount. The left end of the rear connector is screwed and fixedly connected to the forceps tube insertion tee of the upper gastrointestinal endoscope's handle operating part. Compared to the insertion and adhesive fixing method with the camera mount or the forceps tube insertion tee of the upper gastrointestinal endoscope's handle operating part, this significantly improves the connection firmness between the forceps tube assembly and the camera mount and the forceps tube insertion tee of the upper gastrointestinal endoscope's handle operating part; the left and right ends of the main body are respectively... The included tube clamping assembly significantly improves the connection strength of the front and rear connectors at the end of the main tube body, thereby effectively preventing or reducing the likelihood of cracking of the adhesive layer between the front connector and the camera mount, and between the rear connector and the end of the main tube body and the tee fitting of the handle operating part of the upper gastrointestinal endoscope, when the endoscope forceps tube assembly is accidentally dropped or subjected to external impact. This ensures good and durable sealing of the upper gastrointestinal endoscope forceps tube assembly during use, while also helping to improve the safety of the upper gastrointestinal endoscope forceps tube assembly and extend its overall service life. The overall structural design is ingenious and reasonable, with high feasibility for manufacturing and implementation, and strong practicality.

[0007] A preferred technical solution is that the left end of the front connector is provided with a tapered guide head one. When the front connector is inserted and fixed to the right end of the main pipe body, the tapered guide head one is engaged with the left side of the corresponding pipe head clamping assembly. The right end of the rear connector is provided with a tapered guide head two. When the rear connector is inserted and fixed to the left end of the main pipe body, the tapered guide head two is engaged with the right side of the corresponding pipe head clamping assembly. Both the front and rear connectors have tapered guide heads at the ends of the main pipe body that are engaged with the corresponding pipe head clamping assembly on the side furthest from the corresponding connector, thereby further improving the connection strength of the front and rear connectors at the ends of the main pipe body.

[0008] A further preferred technical solution also includes a spring. The outer peripheral side of the right end of the main pipe is provided with a spiral groove 1 and a spiral groove 2 that are connected and extend through each other along the axial length direction. The spiral groove 2 is located on the side of the main pipe near the right end, and the pitch of the spiral groove 2 is less than the pitch of the spiral groove 1. The spring includes an integrally formed spiral segment 1 and spiral segment 2, and the pitch of the spiral segment 2 is less than the pitch of the spiral segment 1. The spring is sleeved and fixed to the right end of the main pipe, with spiral segment 1 embedded inside spiral groove 1 and spiral segment 2 embedded inside spiral groove 2. Spiral groove 1, spiral groove 2, and the spring constitute a curved portion located at the right end of the main pipe. By providing threaded grooves 1 and 2 with different pitches on the outer peripheral side of the right end of the main tube, and fitting and fixing spiral segments 1 and 2 with different pitches on the spring inside the corresponding threaded grooves 1 and 2, and with the smaller threaded groove 2 and spiral segment 2 located at the right end of the main tube, the curved part has two sections with different flexibility, with the more flexible section located at the right end of the main tube. This significantly improves the flexibility of the front end of the curved part, ensuring that when inserting instruments into the upper gastrointestinal endoscope forceps tube assembly of this invention, the front end of the curved part can bend into place first, and the overall curved part has a better bending arc. This helps to improve the smoothness, accuracy, and efficiency of instrument insertion, while significantly shortening the examination time and greatly reducing the patient's pain.

[0009] A further preferred technical solution is that the first helical segment is adhesively fixed inside the first helical groove, and the second helical segment is adhesively fixed inside the second helical groove. The method of fixing the spring inside the helical groove is simple and provides good stability.

[0010] A further preferred technical solution includes two annular grooves on the outer periphery of the right end of the main body, one annular groove being adjacent to the left end of the spiral groove and the other annular groove being adjacent to the right end of the spiral groove. The left end of the spring is wound and glued to the inside of the annular groove at the left end of the spiral groove, and the right end of the spring is wound and glued to the inside of the annular groove at the right end of the spiral groove. A thin-walled elastic tube located on the outer periphery of the spring end is also tensioned and sleeved inside the annular groove. When the front connector is inserted and fixed to the right end of the main body, the annular groove at the right end of the spiral groove corresponds to the annular groove, and the thin-walled elastic tube tensioned and sleeved in the annular groove at the right end of the spiral groove constitutes the tube head clamping assembly at the right end of the main body. The tube head clamping assembly at the left end of the main body is a tube head compression spring. When the rear connector is inserted and fixed to the left end of the main body, the tube head compression spring is correspondingly sleeved and clamped at the position corresponding to the annular groove at the left end of the main body. The spring end is pressed against the bottom of an annular groove by a thin-walled elastic tube. This effectively prevents the spring end from warping and protruding outside the outer periphery of the main tube when the upper gastrointestinal endoscope forceps tube assembly bends due to the insertion of instruments. This prevents wear on the endoscope's beam guide and cable sheath, ensuring the accuracy of the test data and the clarity of the image. The tube head clamping component has a clever and reasonable structural design, ensuring the smooth fabrication and implementation of the upper gastrointestinal endoscope forceps tube assembly of this invention.

[0011] A further preferred technical solution is that the total length L of the main body is 900-1250mm, the length L1 of the bent portion is 108-138mm, the ratio of the length L3 of the second spiral groove to the length L2 of the first spiral groove is 1:2, and the width of the first annular groove along the axial length direction of the main body is 3-5.5mm. The length of the curved section is reasonably designed, and the lengths of the flexible but stiffer section corresponding to the first spiral groove and the more flexible section corresponding to the second spiral groove are also reasonably designed. This ensures that the front end of the curved section can achieve a bending arc of 210°. Therefore, when the upper gastrointestinal endoscope forceps tube assembly of this utility model is used to insert biopsy forceps, it can accurately and efficiently reach the antrum, gastric angle, and other parts inside the stomach cavity. This is beneficial for comprehensive examination of the stomach cavity and biopsy operations. Similarly, when the upper gastrointestinal endoscope forceps tube assembly of this utility model is installed in the endoscope insertion part, the camera is installed at the front end of the forceps tube assembly. The camera needs to bend to examine the upper gastrointestinal tract and the entire stomach cavity. The bending radius of the front end of the curved section is smaller than that of the rear end, which allows the camera to quickly capture images of the examined area. The efficiency of the endoscopic examination operation is higher, which helps to significantly shorten the gastroscopy examination time and reduce the pain of the examinee.

[0012] A further preferred technical solution is that the pitch of the first spiral groove is 2.5–4.5 mm, the pitch of the second spiral groove is 1.8–2.2 mm, the inner diameter of the spring is slightly smaller than the bottom diameters of the first and second spiral grooves, and the groove depths of the first and second spiral grooves are slightly larger than the spring diameter. The reasonable pitch ranges of the first and second spiral grooves, and the fact that the inner diameter of the spring is slightly smaller than the bottom diameters of the first and second spiral grooves, allow the spring to fit snugly against the bottom of the spiral grooves when fitted inside, resulting in good overall fit. The slightly larger groove depths of the first and second spiral grooves cause the outer periphery of the spring to be recessed into the groove, preventing wear on the endoscope's beam guide and cable sheath, further ensuring safety during use.

[0013] A further preferred technical solution is that the main tube is made of polytetrafluoroethylene (PTFE), the spring is made of stainless steel or spring steel, the front and rear connectors are made of stainless steel or brass, and the tube head compression spring is made of stainless steel or 65M spring steel wire. The PTFE material of the main tube provides high wear resistance and a low coefficient of friction and smoothness of the inner wall surface, ensuring smooth insertion and removal of instruments, which helps to shorten the overall operation time when inserting medical instruments into the endoscope and improves examination efficiency. The stainless steel or brass material of the front and rear connectors provides good corrosion resistance, ensuring a long service life for the forceps tube assembly of the upper gastrointestinal endoscope of this invention.

[0014] A further preferred technical solution is that the annular groove three is a V-shaped groove with the opening facing radially outward. The V-shaped groove has good compatibility with the conical end screw on the camera mount, thereby ensuring the convenience of fixing the forceps tube assembly of the upper gastrointestinal endoscope of this utility model to the camera mount.

[0015] A further preferred technical solution includes a positioning eave extending radially outward from the center of the rear connector, with the outer diameter of the positioning eave being greater than the outer diameter of the left end of the rear connector. Both ports of the front connector and the rear connector are designed as tapered openings that gradually expand outward. When the forceps tube assembly of the upper gastrointestinal endoscope of this invention is fixedly connected to the forceps tube insertion tee of the handle operating part of the upper gastrointestinal endoscope, the positioning eave plays a positioning role, helping to accurately determine whether the left end of the rear connector is properly inserted into the forceps tube insertion tee of the handle operating part, thereby improving the connection efficiency between the rear connector and the forceps tube insertion tee of the handle operating part of the upper gastrointestinal endoscope. The tapered opening structure of both ports of the front connector and the rear connector helps to improve the smoothness of instrument insertion and removal through the interior of the upper gastrointestinal endoscope forceps tube assembly.

[0016] The advantages and beneficial effects of this utility model are as follows:

[0017] 1. This utility model discloses a forceps tube assembly for an upper gastrointestinal endoscope. When assembled with a camera, the right end of the front connector is inserted into the mounting hole of the camera mount and fixedly connected to the annular groove on the right end of the front connector using a tapered screw on the camera mount. The left end of the rear connector is screwed and fixedly connected to the forceps tube insertion tee of the upper gastrointestinal endoscope's handle operating part. Compared to the insertion and adhesive fixing method with the camera mount or the forceps tube insertion tee of the upper gastrointestinal endoscope's handle operating part, this significantly improves the connection firmness between the forceps tube assembly and the camera mount and the forceps tube insertion tee of the upper gastrointestinal endoscope's handle operating part; the left and right ends of the main body... The separately designed tube head clamping assembly significantly improves the connection strength of the front and rear connectors at the end of the main tube body. This effectively avoids or reduces the probability of cracking of the adhesive layer between the front connector and the camera seat, and between the rear connector and the end of the main tube body and the tee joint of the upper gastrointestinal endoscope handle operating part, in the event of an accidental drop or impact to the endoscope forceps tube assembly. This ensures good and durable sealing of the upper gastrointestinal endoscope forceps tube assembly during use, while also improving the safety of the upper gastrointestinal endoscope forceps tube assembly and extending its overall service life. The overall structural design is ingenious and reasonable, with high feasibility for manufacturing and implementation, and strong practicality.

[0018] 2. Both the front and rear connectors are equipped with a tapered guide head that snaps into the corresponding pipe head clamping assembly on the side away from the corresponding connector at one end of the main pipe body, thereby further improving the connection strength of the front and rear connectors at the end of the main pipe body.

[0019] 3. By providing threaded grooves 1 and 2 with different pitches on the outer peripheral side of the right end of the main tube, and fitting and fixing the spring with spiral segments 1 and 2 with different pitches inside the corresponding threaded grooves 1 and 2, and with the smaller threaded groove 2 and spiral segment 2 located at the right end of the main tube, the curved part has two sections with different flexibility, and the more flexible section is located at the right end of the main tube. This significantly improves the flexibility of the front end of the curved part, ensuring that when inserting instruments into the upper gastrointestinal endoscope forceps tube assembly of this utility model, the front end of the curved part can bend into place first, and the curved part as a whole has a better bending arc. This helps to improve the smoothness, accuracy and efficiency of instrument insertion, while significantly shortening the examination time and greatly reducing the patient's pain.

[0020] 4. The spring end is pressed against the bottom of the annular groove through a thin-walled elastic tube. This effectively prevents the spring end from protruding beyond the outer periphery of the main tube when the upper gastrointestinal endoscope forceps tube assembly bends due to the insertion of instruments. This prevents wear on the endoscope's beam guide and cable sheath, ensuring the accuracy of the test data and the clarity of the image. The tube head clamping component has a clever and reasonable structural design, ensuring the smooth preparation and implementation of the upper gastrointestinal endoscope forceps tube assembly of this utility model.

[0021] 5. The length of the curved section is reasonably designed, and the lengths of the flexible but stiffer section corresponding to spiral groove one and the more flexible section corresponding to spiral groove two are also reasonably designed. This ensures that the front end of the curved section can achieve a bending arc of 210°. Therefore, when the upper gastrointestinal endoscope forceps tube assembly of this utility model is used to insert biopsy forceps, it can accurately and efficiently reach the antrum, gastric angle, and other parts inside the stomach cavity. This is beneficial for comprehensive examination of the stomach cavity and biopsy operations. Similarly, when the upper gastrointestinal endoscope forceps tube assembly of this utility model is installed in the endoscope insertion part, the camera is installed at the front end of the forceps tube assembly. The camera needs to bend to examine the upper gastrointestinal tract and the entire stomach cavity. The bending radius of the front end of the curved section is smaller than that of the rear end, which allows the camera to quickly capture images of the examined area. The efficiency of the endoscopic examination is higher, which helps to significantly shorten the gastroscopy examination time and reduce the pain of the examinee.

[0022] 6. The pitch of the first spiral groove is 2.5–4.5 mm, and the pitch of the second spiral groove is 1.8–2.2 mm. The inner diameter of the spring is slightly smaller than the bottom diameters of the first and second spiral grooves, and the groove depths of the first and second spiral grooves are slightly larger than the spring diameter. The reasonable pitch range of the first and second spiral grooves, and the fact that the inner diameter of the spring is slightly smaller than the bottom diameters of the first and second spiral grooves, allows the spring to fit snugly against the bottom of the spiral grooves when fitted inside, resulting in good overall fit. The slightly larger groove depths of the first and second spiral grooves cause the outer periphery of the spring to be recessed into the groove, preventing wear on the endoscope's beam guide and cable sheath, further ensuring safety during use.

[0023] 7. The main tube is made of polytetrafluoroethylene (PTFE), the spring is made of stainless steel or spring steel, and the front and rear connectors are made of stainless steel or brass. The PTFE material of the main tube provides high wear resistance and a low coefficient of friction and smoothness on the inner wall surface, ensuring smooth insertion and removal of instruments. This helps shorten the overall operation time when inserting medical instruments into the endoscope and improves examination efficiency. The stainless steel or brass material of the front and rear connectors provides good corrosion resistance, ensuring a long service life for the forceps tube assembly of the upper gastrointestinal endoscope of this invention.

[0024] 8. The aforementioned annular groove three is a V-shaped groove with its opening facing radially outward. The V-shaped groove has good compatibility with the conical end screw on the camera mount, thereby ensuring the convenience of fixing the upper gastrointestinal endoscope tube assembly to the camera mount.

[0025] 9. The rear connector has a positioning eave extending radially outward from the middle, and the outer diameter of the positioning eave is greater than the outer diameter of the left end of the rear connector. Both ports of the front connector and the rear connector are designed as tapered openings that gradually expand from the inside out. When the forceps tube assembly of the upper gastrointestinal endoscope of this invention is fixedly connected to the forceps tube insertion tee of the handle operating part of the upper gastrointestinal endoscope, the positioning eave plays a positioning role, which helps to accurately determine whether the left end of the rear connector is inserted into the forceps tube insertion tee of the handle operating part, thereby improving the connection efficiency between the rear connector and the forceps tube insertion tee of the handle operating part of the upper gastrointestinal endoscope; both ports of the front connector and the rear connector are designed as tapered openings, which helps to improve the smoothness of instruments passing through the inside of the forceps tube assembly of the upper gastrointestinal endoscope. Attached Figure Description

[0026] Figure 1 This is a cross-sectional view along the axial centerline of an upper gastrointestinal endoscope forceps tube assembly in the background art.

[0027] Figure 2 This is a cross-sectional view along the axial centerline of the forceps tube assembly for the upper gastrointestinal endoscope of this utility model.

[0028] Figure 3 yes Figure 2 A magnified view of a section at point H in the middle;

[0029] Figure 4 yes Figure 2 A magnified view of a section at point F in the middle;

[0030] Figure 5 This is a sectional view of the front connector along its axial centerline;

[0031] Figure 6 This is a sectional view of the rear connector along its axial centerline;

[0032] Figure 7 It is a cross-sectional view along the axial centerline after the main body, spring and thin-walled elastic tube are assembled;

[0033] Figure 8 yes Figure 7 A magnified view of a section at point S in the middle;

[0034] Figure 9 yes Figure 7 A magnified view of a section at point T;

[0035] Figure 10 This is a sectional view of the main body along its axial centerline;

[0036] Figure 11 This is a schematic diagram of a spring.

[0037] In the diagram: 1. Main tube; 2. Bend; 3. Spring; 4. Sealing layer; 5. Thin-walled elastic tube; 6. Front connector; 7. Rear connector; 8. Tube head compression spring; 1-1. Spiral groove one; 1-2. Spiral groove two; 1-3. Annular groove one; 3-1. Spiral section one; 3-2. Spiral section two; 6-1. Annular groove two; 6-2. Conical guide one; 6-3. Annular groove three; 7-1. Annular groove four; 7-2. Conical guide two; 7-3. Threaded structure; 7-4. Positioning eaves; A. Front connector; B. Rear connector. Detailed Implementation

[0038] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0039] Example

[0040] like Figures 2-11 As shown, this utility model is a forceps tube assembly for an upper gastrointestinal endoscope, including a main body 1, a front connector 6, and a rear connector 7. The right end of the main body 1 has a bent portion 2. The outer peripheral side of the left end of the front connector 6 has an annular groove 6-1 and the outer peripheral side of the right end has an annular groove 6-3. The outer peripheral side of the right end of the rear connector 7 has an annular groove 7-1 and the outer peripheral side of the left end has a threaded structure 7-3. The left and right ends of the main body 1 are respectively provided with tube head clamping components. The left end of the front connector 6 is glued to the right end of the main body 1 through the corresponding tube head clamping components, and the right end of the rear connector 7 is glued to the left end of the main body 1 through the corresponding tube head clamping components. Specifically, epoxy resin sealant can be used to glue the front connector 6 and the rear connector 7 to the left and right ends of the main body 1, and the epoxy resin sealant forms a sealant layer 4 after curing.

[0041] Preferably, the left end of the front connector 6 is provided with a tapered guide head 6-2. When the front connector 6 is inserted and fixed to the right end of the main body 1, the tapered guide head 6-2 is snapped onto the left side of the corresponding pipe head clamping assembly. The right end of the rear connector 7 is provided with a tapered guide head 7-2. When the rear connector 7 is inserted and fixed to the left end of the main body 1, the tapered guide head 7-2 is snapped onto the right side of the corresponding pipe head clamping assembly.

[0042] More preferably, it also includes a spring 3. The outer peripheral side of the right end of the main body 1 is provided with a spiral groove 1-1 and a spiral groove 1-2 that are connected in the axial length direction. The spiral groove 1-2 is located on the side of the main body 1 near the right end, and the pitch of the spiral groove 1-2 is less than the pitch of the spiral groove 1-1. The spring 3 includes an integrally formed spiral segment 3-1 and a spiral segment 3-2, and the pitch of the spiral segment 3-2 is less than the pitch of the spiral segment 3-1. The spring 3 is sleeved and fixed to the right end of the main body 1, and the spiral segment 3-1 is embedded in the spiral groove 1-1 and the spiral segment 3-2 is embedded in the spiral groove 1-2. The spiral groove 1-1, the spiral groove 1-2 and the spring 3 constitute the curved part 2 located at the right end of the main body 1.

[0043] More preferably, the first spiral segment 3-1 is adhesively fixed inside the first spiral groove 1-1, and the second spiral segment 3-2 is adhesively fixed inside the second spiral groove 1-2.

[0044] More preferably, the bent portion 2 further includes two annular grooves 1-3 formed on the outer peripheral side of the right end of the main body 1. One annular groove 1-3 is adjacent to the left end of the spiral groove 1-1, and the other annular groove 1-3 is adjacent to the right end of the spiral groove 1-2. The left end of the spring 3 is wound and glued to the inside of the annular groove 1-3 located at the left end of the spiral groove 1-1, and the right end of the spring 3 is wound and glued to the inside of the annular groove 1-3 located at the right end of the spiral groove 1-2. A thin-walled elastic tube 5 located on the outer peripheral side of the end of the spring 3 is also tensioned and sleeved inside the annular groove 1-3.

[0045] When the front connector 6 is inserted and fixed to the right end of the main body 1, the annular groove 1-3 at the right end of the spiral groove 1-2 corresponds to the annular groove 6-1, and the thin-walled elastic tube 5, which is tensioned and sleeved in the annular groove 1-3 at the right end of the spiral groove 1-2, constitutes the tube head clamping assembly at the right end of the main body 1.

[0046] The pipe head clamping assembly located at the left end of the main body 1 is a pipe head compression spring 8. When the rear connector 7 is inserted and fixed at the left end of the main body 1, the pipe head compression spring 8 is correspondingly sleeved and pressed at the position corresponding to the annular groove 7-1 at the left end of the main body 1. Specifically, the spring 3 is bonded to the inside of the spiral groove 1-1 and the spiral groove 1-2 using silicone rubber adhesive, and the end of the spring 3 is bonded to the inside of the corresponding annular groove 1-3. After the silicone rubber adhesive cures, a sealing layer 4 is formed.

[0047] More preferably, the total length L of the main body 1 is 900-1250mm, the length L1 of the bent portion 2 is 108-138mm, the ratio of the length L3 of the spiral groove 1-2 to the length L2 of the spiral groove 1-1 is 1:2, and the width of the annular groove 1-3 along the axial length direction of the main body 1 is 3-5.5mm.

[0048] More preferably, the pitch of the first spiral groove 1-1 is 2.5 to 4.5 mm, the pitch of the second spiral groove 1-2 is 1.8 to 2.2 mm, the inner diameter of the spring 3 is slightly smaller than the bottom diameter of the first spiral groove 1-1 and the bottom diameter of the second spiral groove 1-2, and the groove depth of the first spiral groove 1-1 and the second spiral groove 1-2 is slightly larger than the diameter of the spring 3.

[0049] More preferably, the main tube 1 is made of polytetrafluoroethylene, the spring 3 is made of stainless steel or spring steel, the front connector 6 and the rear connector 7 are made of stainless steel or brass, and the tube head compression spring 8 is made of stainless steel or 65M spring steel wire.

[0050] More preferably, the annular groove 6-3 is a V-shaped annular groove with its opening facing radially outward.

[0051] More preferably, the rear connector 7 has a positioning eave 7-4 extending radially outward in the middle, and the outer diameter of the positioning eave 7-4 is greater than the outer diameter of the left end of the rear connector 7. The two ports of the front connector 6 and the two ports of the rear connector 7 are both set as tapered opening structures that gradually expand from the inside to the outside.

[0052] The working principle of the forceps tube assembly for upper gastrointestinal endoscopes according to this utility model is as follows:

[0053] When assembling with the camera, insert the right end of the front connector 6 into the mounting hole of the camera mount, and fix it together with the annular groove 3 6-3 on the right end of the front connector 6 by the tapered screw on the camera mount; fix the left end of the rear connector 7 together with the tee part of the handle operation part of the upper gastrointestinal endoscope.

[0054] This utility model discloses a forceps tube assembly for an upper gastrointestinal endoscope. When assembled with a camera, the right end of the front connector is inserted into the mounting hole of the camera mount and fixedly connected to the annular groove on the right end of the front connector using a tapered screw on the camera mount. The left end of the rear connector is screwed and fixedly connected to the forceps tube insertion tee of the upper gastrointestinal endoscope's handle operating part. Compared to the insertion and adhesive fixing method with the camera mount or the forceps tube insertion tee of the upper gastrointestinal endoscope's handle operating part, this significantly improves the connection firmness between the forceps tube assembly and the camera mount and the forceps tube insertion tee of the upper gastrointestinal endoscope's handle operating part; the left and right ends of the main body are respectively... The included tube clamping assembly significantly improves the connection strength of the front and rear connectors at the end of the main tube body, thereby effectively preventing or reducing the likelihood of cracking of the adhesive layer between the front connector and the camera mount, and between the rear connector and the end of the main tube body and the tee fitting of the handle operating part of the upper gastrointestinal endoscope, when the endoscope forceps tube assembly is accidentally dropped or subjected to external impact. This ensures good and durable sealing of the upper gastrointestinal endoscope forceps tube assembly during use, while also helping to improve the safety of the upper gastrointestinal endoscope forceps tube assembly and extend its overall service life. The overall structural design is ingenious and reasonable, with high feasibility for manufacturing and implementation, and strong practicality.

[0055] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A forceps tube assembly for an upper gastrointestinal endoscope, characterized in that, The device includes a main body (1), a front connector (6), and a rear connector (7). The right end of the main body (1) is provided with a bent part (2). The outer peripheral side of the left end of the front connector (6) is provided with an annular groove 2 (6-1) and the outer peripheral side of the right end is provided with an annular groove 3 (6-3). The outer peripheral side of the right end of the rear connector (7) is provided with an annular groove 4 (7-1) and the outer peripheral side of the left end is provided with a threaded structure (7-3). The left and right ends of the main body (1) are respectively provided with pipe head clamping components. The left end of the front connector (6) is fixed to the right end of the main body (1) by inserting and gluing the corresponding pipe head clamping components. The right end of the rear connector (7) is fixed to the left end of the main body (1) by inserting and gluing the corresponding pipe head clamping components.

2. The forceps-tube assembly for an upper gastrointestinal endoscope as described in claim 1, characterized in that, The front connector (6) has a tapered guide head 1 (6-2) at its left end. When the front connector (6) is inserted and fixed to the right end of the main body (1), the tapered guide head 1 (6-2) is snapped into the left side of the corresponding pipe head clamping assembly. The rear connector (7) has a tapered guide head 2 (7-2) at its right end. When the rear connector (7) is inserted and fixed to the left end of the main body (1), the tapered guide head 2 (7-2) is snapped into the right side of the corresponding pipe head clamping assembly.

3. The forceps-tube assembly for an upper gastrointestinal endoscope as described in claim 2, characterized in that, It also includes a spring (3). The outer peripheral side of the right end of the main body (1) is provided with a spiral groove 1 (1-1) and a spiral groove 2 (1-2) that are connected in the axial length direction. The spiral groove 2 (1-2) is located on the side of the main body (1) near the right end, and the pitch of the spiral groove 2 (1-2) is less than the pitch of the spiral groove 1 (1-1). The spring (3) includes a spiral segment 1 (3-1) and a spiral segment 2 (3-2) integrally formed, and the pitch of the spiral segment 2 (3-2) is less than the pitch of the spiral segment 1 (3-1). The spring (3) is sleeved and fixed to the right end of the main body (1), and the spiral segment 1 (3-1) is embedded in the spiral groove 1 (1-1) and the spiral segment 2 (3-2) is embedded in the spiral groove 2 (1-2). The spiral groove 1 (1-1), the spiral groove 2 (1-2) and the spring (3) constitute the curved part (2) located at the right end of the main body (1).

4. The forceps-tube assembly for an upper gastrointestinal endoscope as described in claim 3, characterized in that, The first spiral segment (3-1) is glued and fixed inside the first spiral groove (1-1), and the second spiral segment (3-2) is glued and fixed inside the second spiral groove (1-2).

5. The forceps-tube assembly for an upper gastrointestinal endoscope as described in claim 4, characterized in that, The bending part (2) further includes two annular grooves (1-3) on the outer peripheral side of the right end of the main body (1). One annular groove (1-3) is adjacent to the left end of the spiral groove (1-1), and the other annular groove (1-3) is adjacent to the right end of the spiral groove (1-2). The left end of the spring (3) is wrapped and glued to the inside of the annular groove (1-3) located at the left end of the spiral groove (1-1). The right end of the spring (3) is wrapped and glued to the inside of the annular groove (1-3) located at the right end of the spiral groove (1-2). A thin-walled elastic tube (5) located on the outer peripheral side of the end of the spring (3) is also tensioned and sleeved inside the annular groove (1-3). When the front connector (6) is inserted and fixed at the right end of the main body (1), the annular groove (1-3) at the right end of the spiral groove (1-2) corresponds to the annular groove (6-1), and the thin-walled elastic tube (5) that is tensioned and fitted in the annular groove (1-3) at the right end of the spiral groove (1-2) constitutes the tube head clamping assembly at the right end of the main body (1). The pipe head clamping assembly located at the left end of the main body (1) is a pipe head compression spring (8). When the rear connector (7) is inserted and fixed at the left end of the main body (1), the pipe head compression spring (8) is correspondingly sleeved and pressed at the position corresponding to the annular groove four (7-1) at the left end of the main body (1).

6. The forceps-tube assembly for an upper gastrointestinal endoscope as described in claim 5, characterized in that, The total length L of the main body (1) is 900-1250mm, the length L1 of the curved part (2) is 108-138mm, the length L3 of the spiral groove 2 (1-2) is 1:2 to the length L2 of the spiral groove 1 (1-1), and the width of the annular groove 1 (1-3) along the axial length direction of the main body (1) is 3-5.5mm.

7. The forceps-tube assembly for an upper gastrointestinal endoscope as described in claim 6, characterized in that, The pitch of the first spiral groove (1-1) is 2.5 to 4.5 mm, the pitch of the second spiral groove (1-2) is 1.8 to 2.2 mm, the inner diameter of the spring (3) is slightly smaller than the bottom diameter of the first spiral groove (1-1) and the bottom diameter of the second spiral groove (1-2), and the groove depth of the first spiral groove (1-1) and the second spiral groove (1-2) is slightly larger than the diameter of the spring (3).

8. The forceps-tube assembly for an upper gastrointestinal endoscope as described in claim 7, characterized in that, The main body (1) is made of polytetrafluoroethylene, the spring (3) is made of stainless steel or spring steel, the front connector (6) and the rear connector (7) are made of stainless steel or brass, and the tube head compression spring (8) is made of stainless steel or 65M spring steel wire.

9. The forceps tube assembly for an upper gastrointestinal endoscope as described in any one of claims 1 to 8, characterized in that, The aforementioned annular groove three (6-3) is a V-shaped annular groove with its opening facing outwards radially.

10. The forceps-tube assembly for an upper gastrointestinal endoscope as described in claim 9, characterized in that, The rear connector (7) has a positioning eave (7-4) that extends radially outward to the outer periphery in the middle, and the outer diameter of the positioning eave (7-4) is greater than the outer diameter of the left end of the rear connector (7); the two ports of the front connector (6) and the two ports of the rear connector (7) are both set as tapered opening structures that gradually expand from the inside to the outside.

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