Tong channel tube with good bending performance for upper gastrointestinal tract endoscope

Abstract

The forceps channel pipe comprises a main pipe body and a spring, a first spiral groove and a second spiral groove which are connected in a penetrating mode are formed in the peripheral side face of the right end of the main pipe body, the second spiral groove is located at the right end of the main pipe body, and the screw pitch of the second spiral groove is smaller than that of the first spiral groove. The spring comprises a first spiral section and a second spiral section which are integrally formed, the screw pitch of the second spiral section is smaller than that of the first spiral section, the spring is fixedly arranged at the right end of the main pipe body in a sleeved mode, the first spiral section is embedded in the first spiral groove, the second spiral section is embedded in the second spiral groove, and the first spiral groove, the second spiral groove and the spring form a bent part located at the right end of the main pipe body. The bending part on the forceps channel pipe is provided with the two sections with different flexibility, the section with better flexibility is positioned at the right end part of the main pipe body, and the whole bending part has better bending radian, so that the smoothness, the accuracy and the insertion efficiency when an instrument is inserted are improved, the examination time is obviously shortened, and the pain of a subject is reduced.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a forceps tube for an upper gastrointestinal endoscope with good flexibility. Background Technology

[0002] The forceps tube is an important component used in endoscopes. It allows instruments to enter the area to be inspected through a narrow opening. Since the space where the endoscope needs to enter is relatively small and the path is relatively rugged, the forceps tube needs to have a certain degree of flexibility. Furthermore, the front end of the forceps tube sometimes needs to be operated or inspected from multiple angles, so the flexibility requirements of the front end of the forceps tube are even more stringent.

[0003] Currently, forceps tubes generally have a curved section at the front end of the main tube to meet the bending requirements of the forceps tube's tip. For example, Chinese utility model patent application number 202223305080.0 discloses a forceps tube for endoscopy, including a polytetrafluoroethylene (PTFE) flexible tube, two circumferential locking components, and a spring. The right end of the PTFE flexible tube has a curved section integrated therewith, and the spring is sleeved on the curved section. One end of the spring is fixedly connected to one end of the curved section through one of the circumferential locking components, and the other end of the spring is fixedly connected to the other end of the curved section through the other circumferential locking component. The rigidity of the curved section at the front end of this forceps tube is uniform, and because the flexibility of the front end of the curved section is poor, it generally bends in the middle first when bending. When this forceps tube is used for gastroscopy, the front end of the curved section cannot bend quickly, making it difficult to quickly locate the pyloric entrance, and prolonged operation can increase patient discomfort. Therefore, this utility model proposes a forceps tube for upper gastrointestinal endoscopy with better bending performance to solve the above-mentioned technical problems. Summary of the Invention

[0004] The purpose of this invention is to overcome the defects in the existing technology and provide a forceps tube for upper gastrointestinal endoscopes with good bending performance. This is achieved by having two threaded grooves of different pitch sizes on the outer peripheral side of the right end of the main tube, and two spiral segments of different pitch sizes on a spring, which are then fitted and fixed inside the corresponding threaded grooves. The threaded groove and spiral segment with the smaller pitch size are located at the right end of the main tube, giving the bending section two sections with different flexibility. The more flexible section is located at the right end of the main tube, significantly improving the flexibility of the bending tip. This ensures that when the forceps tube is used for inserting instruments into an upper gastrointestinal endoscope, the bending tip can bend into place first, and the overall bending section has a better curvature. This helps improve the smoothness, accuracy, and efficiency of instrument insertion, while significantly shortening the examination time and greatly reducing patient discomfort. The overall structure is ingeniously and reasonably designed, with high feasibility for manufacture and implementation, and strong practicality.

[0005] To achieve the above objectives, the technical solution of this utility model is to design a forceps tube for an upper gastrointestinal endoscope with good bending performance, including a main body and a spring. The outer peripheral side of the right end of the main body is provided with a spiral groove 1 and a spiral groove 2 that are connected and run through each other along the axial length direction. The spiral groove 2 is located on the side of the main body 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 a spiral segment 1 and a spiral segment 2 integrally formed, 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 body, and the spiral segment 1 is embedded in the spiral groove 1 and the spiral segment 2 is embedded in the spiral groove 2. The spiral groove 1, the spiral groove 2 and the spring constitute the curved part located at the right end of the main body.

[0006] This utility model discloses a forceps tube for upper gastrointestinal endoscopes with good bending performance. It features two threaded grooves (one and two) with different pitches on the outer periphery of the right end of the main tube. Two spiral segments (one and two) with different pitches on a spring are fitted and fixed inside the corresponding threaded grooves. The threaded groove and spiral segment with the smaller pitch are located at the right end of the main tube, creating two sections with different levels of flexibility in the bending section. The more flexible section is located at the right end of the main tube, significantly improving the flexibility of the bending tip. This ensures that when the forceps tube is used to insert instruments for upper gastrointestinal endoscopes, the bending tip can bend into place first, and the overall bending curvature is better. This helps improve the smoothness, accuracy, and efficiency of instrument insertion, while significantly shortening the examination time and greatly reducing patient discomfort. The overall structure is ingeniously and reasonably designed, with high feasibility for manufacture and implementation, and strong practicality.

[0007] The 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.

[0008] A further preferred technical solution includes two annular grooves on the outer periphery of the right end of the main tube. One annular groove is adjacent to the left end of the first spiral groove, and the other annular groove is adjacent to the right end of the second 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 first 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 second spiral groove. A thin-walled elastic tube is also tensioned and sleeved inside the annular groove on the outer periphery of the spring end. The spring end is pressed against the bottom of the annular groove by the thin-walled elastic tube, effectively preventing the spring end from warping and protruding outside the outer periphery of the main tube when the bending part of the clamp tube is bent due to the insertion of the instrument. This prevents wear on the endoscope's beam guide and cable sheath, ensuring the accuracy of the detection data and the clarity of the image.

[0009] A further preferred technical solution is that the thin-walled elastic tube is made of medical-grade silicone. Medical-grade silicone has good elasticity and meets the hygiene standards required for medical devices.

[0010] A further preferred technical solution is that the total length L of the main body is 900~1250mm, the length L1 of the bent part 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 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 forceps tube of this invention 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 forceps tube of this invention is installed in the endoscope insertion part, the camera is installed at the front end of the forceps tube. The camera needs to bend to examine the upper digestive 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. This makes the endoscopic examination operation more efficient, thus helping to significantly shorten the gastroscopy examination time and reduce the patient's pain.

[0011] A further preferred technical solution is that the pitch of the first spiral groove is 2.5~4.5mm, and the pitch of the second spiral groove is 1.8~2.2mm. The pitch ranges of the first and second spiral grooves are reasonably set to ensure the smooth fabrication and implementation of the clamp tube of this utility model.

[0012] A further preferred technical solution is that the inner diameter of the spring is slightly smaller than the bottom diameter of the first spiral groove and the bottom diameter of the second spiral groove, and the groove depth of the first and second spiral grooves is slightly larger than the diameter of the spring. The slightly smaller inner diameter of the spring allows it to fit snugly against the bottom of the spiral grooves when fitted inside, resulting in good overall fit. The slightly larger groove depth of the first and second spiral grooves causes 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 top surface of the spiral groove one and the spiral groove two are rounded, the root shape is R-shaped, and the tooth angle is 30~40°.

[0014] A further preferred technical solution is that the main tube is made of polytetrafluoroethylene (PTFE), and the spring is made of stainless steel or spring steel. The PTFE material of the main tube provides high wear resistance, and the low coefficient of friction and smoothness of the inner wall surface ensure smooth insertion and removal of instruments, helping to shorten the overall operation time when inserting medical devices into the endoscope and improving examination efficiency.

[0015] The advantages and beneficial effects of this utility model are as follows:

[0016] 1. This utility model discloses a forceps tube with good bending performance for upper gastrointestinal endoscopes. It features two threaded grooves (one and two) with different pitches on the outer periphery of the right end of the main tube body. A spring with two spiral segments (one and two) of different pitches is fitted and fixed inside the corresponding threaded grooves. The threaded groove and spiral segment with the smaller pitch are located at the right end of the main tube body. This results in two sections with different flexibility in the bending section, with the more flexible section located at the right end of the main tube body. This significantly improves the flexibility of the bending tip, ensuring that when the forceps tube is used to insert instruments for upper gastrointestinal endoscopes, the bending tip can bend into position first. Furthermore, the overall bending curvature of the bending section is better, which helps improve the smoothness, accuracy, and efficiency of instrument insertion, while significantly shortening the examination time and greatly reducing patient discomfort. The overall structure is ingeniously and reasonably designed, with high feasibility for manufacture and implementation, and strong practicality.

[0017] 2. 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 sticking out of the outer side of the main tube when the instrument bends at the curved part of the clamp tube. This prevents wear on the endoscope's beam guide and cable sheath, ensuring the accuracy of the test data and the clarity of the camera image.

[0018] 3. The total length L of the main body is 900~1250mm, the length L1 of the bent part 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 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 forceps tube of this invention 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 forceps tube of this invention is installed in the endoscope insertion part, the camera is installed at the front end of the forceps tube. The camera needs to bend to examine the upper digestive 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. This makes the endoscopic examination operation more efficient, thus helping to significantly shorten the gastroscopy examination time and reduce the patient's pain.

[0019] 4. The inner diameter of the spring is slightly smaller than the bottom diameter of spiral groove one and spiral groove two, and the groove depth of spiral groove one and spiral groove two is slightly larger than the diameter of the spring. The slightly smaller inner diameter of the spring allows it to fit snugly against the bottom of the spiral grooves when fitted inside spiral groove one and spiral groove two, resulting in good overall fit. The slightly larger groove depth of spiral groove one and spiral groove two causes 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.

[0020] 5. The main tube is made of polytetrafluoroethylene (PTFE), and the spring is made of stainless steel or spring steel. The PTFE material of the main tube provides high wear resistance, and the low coefficient of friction and smoothness of the inner wall surface ensure smooth insertion and removal of instruments, helping to shorten the overall operation time when inserting medical devices into the endoscope and improve examination efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic cross-sectional view of the axial centerline of a forceps tube for an upper gastrointestinal endoscope with good bending performance according to this utility model.

[0022] Figure 2 yes Figure 1 A magnified view of a section at point H in the middle;

[0023] Figure 3 yes Figure 1 A magnified view of a section at point S in the middle;

[0024] Figure 4 This is a schematic diagram of the main body's front structure (section view at both ends);

[0025] Figure 5 This is a schematic diagram of the main structure of a spring.

[0026] In the diagram: 1. Main tube; 2. Bending section; 3. Spring; 4. Sealing layer; 5. Thin-walled elastic tube; 1-1. Spiral groove one; 1-2. Spiral groove two; 1-3. Annular groove; 3-1. Spiral section one; 3-2. Spiral section two. Detailed Implementation

[0027] 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.

[0028] Example

[0029] like Figures 1-5 As shown, this utility model is a forceps tube for an upper gastrointestinal endoscope with good bending performance, including a main body 1 and 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 a spiral segment 3-1 and a spiral segment 3-2 that are integrally formed, 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 bent part 2 located at the right end of the main body 1.

[0030] 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.

[0031] More preferably, the curved 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 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 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. Specifically, the spring 3 is bonded and fixed to the inside of the spiral groove 1 and spiral groove 1-2 using epoxy resin sealant. After the epoxy resin sealant cures, it forms a sealant layer 4.

[0032] More preferably, the thin-walled elastic tube 5 is made of medical-grade silicone.

[0033] More preferably, the total length L of the main body 1 is 900~1250mm, the length L1 of the bent part 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.

[0034] More preferably, the pitch of the spiral groove 1-1 is 2.5~4.5mm, and the pitch of the spiral groove 1-2 is 1.8~2.2mm.

[0035] More preferably, the inner diameter of the spring 3 is slightly smaller than the bottom diameter of the spiral groove 1-1 and the bottom diameter of the spiral groove 1-2, and the groove depth of the spiral groove 1-1 and the spiral groove 1-2 is slightly larger than the diameter of the spring 3.

[0036] More preferably, the top surface of the spiral groove 1-1 and the spiral groove 1-2 is rounded, the root shape is R-shaped, and the tooth angle is 30~40°.

[0037] More preferably, the main body 1 is made of polytetrafluoroethylene, and the spring 3 is made of stainless steel or spring steel.

[0038] This invention provides a flexible forceps tube for upper gastrointestinal endoscopes. It features two threaded grooves (one and two) with different pitches on the outer periphery of the right end of the main tube. Two spiral segments (one and two) with different pitches on a spring are fitted and fixed inside the corresponding threaded grooves. The smaller threaded groove and spiral segment are located at the right end of the main tube, creating two sections with different flexibility in the bending section. The more flexible section is located at the right end of the main tube, significantly improving the flexibility of the bending tip. This ensures that when the forceps tube is used to insert instruments for upper gastrointestinal endoscopes, the bending tip can bend into place first, and the overall bending curvature is better. This improves the smoothness, accuracy, and efficiency of instrument insertion, significantly shortens examination time, and greatly reduces patient discomfort. The overall structure is ingeniously designed, highly feasible to manufacture and implement, and highly practical.

[0039] 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 for an upper gastrointestinal endoscope with good flexibility, characterized in that, The system includes a main body (1) and a spring (3). The outer peripheral side of the right end of the main body (1) is sequentially provided with a spiral groove 1 (1-1) and a spiral groove 2 (1-2) that are connected and extend along 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 an integrally formed spiral segment 1 (3-1) and spiral segment 2 (3-1). -2), and the pitch of the second helical segment (3-2) is less than the pitch of the first helical segment (3-1). The spring (3) is sleeved and fixed to the right end of the main body (1). The first helical segment (3-1) is embedded in the first helical groove (1-1), and the second helical segment (3-2) is embedded in the second helical groove (1-2). The first helical groove (1-1), the second helical groove (1-2) and the spring (3) constitute the curved part (2) located at the right end of the main body (1).

2. The pincer channel tube for an upper gastrointestinal endoscope having excellent bending performance according to claim 1, characterized by 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).

3. The curved performance upper gastrointestinal endoscope forceps channel tube according to claim 2, characterized by 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 first spiral groove (1-1), and the other annular groove (1-3) is adjacent to the right end of the second 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 first spiral groove (1-1). 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 second 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).

4. The curved performance upper gastrointestinal endoscope forceps channel tube according to claim 3, characterized by The thin-walled elastic tube (5) is made of medical-grade silicone.

5. The pincer channel tube for an upper gastrointestinal endoscope having good bending performance according to claim 4, 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 (1-3) along the axial length direction of the main body (1) is 3-5.5mm.

6. The pincer channel tube for an upper gastrointestinal endoscope according to any one of claims 1 to 5, characterized in that The pitch of the first spiral groove (1-1) is 2.5 to 4.5 mm, and the pitch of the second spiral groove (1-2) is 1.8 to 2.2 mm.

7. The pincer channel tube for an upper gastrointestinal endoscope having excellent bending performance according to claim 6, characterized by 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 pincer channel tube for an upper gastrointestinal endoscope having excellent bending performance according to claim 7, characterized by The spiral groove one (1-1) and spiral groove two (1-2) have rounded top surfaces, R-shaped tooth roots, and tooth angles of 30-40°.

9. The pincer channel tube for an upper gastrointestinal endoscope according to claim 8, wherein The main body (1) is made of polytetrafluoroethylene, and the spring (3) is made of stainless steel or spring steel.

Images