Submucosal injection device for digestive endoscopy

Abstract

The application relates to the technical field of medical devices, in particular to a submucosal injection device for a digestive endoscope; a quantitative sleeve is internally provided with a threaded ring at the bottom of the lateral wall; a squeezer is arranged in the quantitative sleeve, and a threaded groove is formed in the outer surface of the squeezer; a limiting sleeve is arranged in the quantitative sleeve, and one end of the limiting sleeve is inserted into the squeezer; a squeezer rod is arranged in the limiting sleeve, and one end of the squeezer rod is connected with a piston; the quantitative sleeve is rotated, the threaded ring connected with the quantitative sleeve moves in the threaded groove, the distance between the end of the limiting sleeve and the piston is adjusted, then the quantitative sleeve arranged in rotation is fixed through cooperation of the elastically arranged pull rod and the positioning hole, then the piston is moved in the liquid storage cavity by pulling the pull rod, the liquid medicine is extracted through negative pressure, and the movement distance of the piston is limited by the end of the limiting sleeve during the pulling process, so that the quantity of the extracted liquid medicine is accurately controlled.

Description

Technical Field

[0001] This invention relates to the field of medical devices, specifically a submucosal injection device for digestive endoscopy. Background Technology

[0002] Submucosal injection is a medical procedure in which drugs or preparations are injected directly into the submucosa. It is mainly used for local treatment, hemostasis, or marking of lesions. Through precise positioning, it enables drugs to act quickly on the lesion area and is commonly used in fields such as gastroenterology and dermatology.

[0003] Chinese patent publication number CN211659041U discloses an intestinal submucosal injection device, including a control catheter, an expandable component disposed at the front end of the control catheter, an injection device disposed on the outside of the expandable component, and a pneumatic device that cooperates with the injection device. This invention provides an intestinal submucosal injection device with a control catheter and an expandable component, facilitating the insertion of the injection device disposed on the outside of the expandable component into a designated location in the intestine as needed, greatly improving the convenience of drug injection and the controllability of the injection depth. Simultaneously, the injection device has multiple micro-injection devices evenly distributed on the outside of the expandable component. The pneumatic device, in conjunction with the micro-injection devices, allows for simultaneous injection at multiple points on the mucosa, significantly improving injection efficiency and reducing patient discomfort. Furthermore, the pneumatic device and micro-injection devices are easy to control, preventing excessive drug injection that could lead to mucosal necrosis.

[0004] Traditional injection methods mostly use injection needles. When using injection needles, the required amount of medication is first drawn up through the needle. However, it is difficult to accurately control the amount of medication drawn up, and often more than the amount is drawn up and then the excess is pushed out, resulting in medication waste.

[0005] Therefore, a submucosal injection device for digestive endoscopy was proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a submucosal injection device for digestive endoscopy to solve the problem of inaccurate control of drug extraction volume mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A submucosal injection device for digestive endoscopy, comprising:

[0009] The metering sleeve has a hollow cylindrical structure, and a threaded ring is provided at the bottom end of the inner side wall of the metering sleeve;

[0010] An extruder is disposed inside the metering sleeve, and the outer surface of the extruder is provided with a threaded groove that mates with the threaded ring;

[0011] A limiting sleeve is disposed inside the metering sleeve, and one end of the limiting sleeve is inserted into the interior of the extruder;

[0012] The extrusion rod is slidably disposed inside the limiting sleeve, and one end of the extrusion rod is connected to a piston.

[0013] Preferably, the outer diameter of the extruder matches the inner diameter of the metering sleeve;

[0014] The threaded groove has a spiral structure, and the spacing between two adjacent turns of the threaded groove is the same. Each turn of the threaded groove has a scale line at its center, and the spacing between any two sets of adjacent scale lines is the same.

[0015] Preferably, the threaded ring is screwed into the inside of the threaded groove, and the metering sleeve is rotatably connected to the extruder through the cooperation of the threaded ring and the threaded groove;

[0016] A positioning line is provided at the center of the bottom of the metering sleeve, and the positioning line and the scale line are arranged perpendicularly.

[0017] Preferably, a second through hole is provided at one end of the metering sleeve near the positioning line, and the second through hole penetrates the metering sleeve.

[0018] Preferably, a pull rod is inserted into the inside of the second through hole, and a return spring is sleeved on the outer surface of the pull rod. The two ends of the return spring are respectively connected to the metering sleeve and the end of the pull rod.

[0019] Preferably, the extruder has a positioning hole at the end position of the pull rod, and multiple sets of positioning holes are evenly distributed between two adjacent sets of scale lines.

[0020] The spacing between two adjacent sets of positioning holes is the same as the distance between two adjacent sets of scale lines.

[0021] Preferably, the outer surface of the pull rod is provided with a relief block, and the inner wall of the second through hole is provided with a rotating groove corresponding to the position of the relief block;

[0022] The clearance block is slidably engaged inside the rotating groove, and the two ends of the rotating groove are respectively connected to a slot and a clearance groove. The internal size of the slot and the clearance groove are adapted to the size of the clearance block.

[0023] The length of the clearance groove is longer than the length of the card slot.

[0024] Preferably, the extruder has a liquid storage chamber inside, and the extrusion rod is inserted into the liquid storage chamber;

[0025] The piston is slidably disposed inside the liquid storage chamber via the extrusion rod, and a limiting ring is provided inside the liquid storage chamber. The limiting ring is fixedly disposed at the bottom end of the liquid storage chamber, and the position of the limiting ring is flush with the bottom end of the threaded groove.

[0026] Preferably, the limiting sleeve has a sliding hole at a position corresponding to the liquid storage cavity, and the limiting sleeve is inserted between the extruder and the extrusion rod through the sliding hole;

[0027] A sealing ring is provided at the end of the liquid storage cavity at the position corresponding to the limiting sleeve.

[0028] Preferably, a positioning ring is provided on the inner wall of the metering sleeve at the end position corresponding to the end position of the limiting sleeve, and a limiting groove is formed on the side wall of the positioning ring near the limiting sleeve.

[0029] A limiting block is rotatably provided inside the limiting groove, and the limiting block is connected to the limiting sleeve;

[0030] The limiting sleeve is rotatably connected to the metering sleeve through the cooperation of the limiting groove and the limiting block.

[0031] Compared with the prior art, the beneficial effects of the present invention are:

[0032] This invention enables a threaded ring fixedly connected to a metering sleeve to move smoothly and precisely axially along the threaded groove by rotating the metering sleeve, thereby achieving continuous adjustment of the distance between the end of the limiting sleeve and the piston. This threaded transmission structure features smooth transmission and high positioning accuracy, and can precisely preset the maximum stroke of the piston, fundamentally avoiding the deviation problems that easily occur in manual volume control in existing technologies. It ensures that the amount of medication extracted each time strictly meets the preset requirements, effectively improving the accuracy and consistency of medication extraction, and is particularly suitable for medical scenarios with stringent dosage requirements.

[0033] After the position of the metering sleeve is adjusted, the elastically designed pull rod engages with the positioning hole to quickly and securely limit the rotation of the sleeve, preventing accidental rotation or displacement during piston retraction and ensuring the stability of the volume control structure. Simultaneously, the elastic pull rod design makes positioning and unlocking operations simple and efficient, requiring no additional tools, greatly simplifying the operation process, reducing the difficulty for medical staff, and improving work efficiency.

[0034] A piston reciprocates linearly within the storage chamber by pulling a lever, utilizing the negative pressure generated by the piston's movement to rapidly extract the medication. During the pulling process, the end of a limiting sleeve rigidly limits the piston's stroke. When the piston reaches a preset position, the limiting sleeve precisely engages with the piston, forcibly stopping its further movement and completely eliminating the possibility of medication overflow or insufficient extraction due to over-pulling. Furthermore, the sealed fit between the piston and the storage chamber, along with the smoothness of the threaded drive, ensures a smooth and uninterrupted extraction process, further guaranteeing the reliability and safety of the medication extraction.

[0035] The quantitative liquid extraction structure of this invention features a simple and compact design, which can flexibly adapt to different specifications and types of liquid storage containers. It is suitable not only for medical devices such as syringes and infusion sets, but also for applications in laboratories, chemical plants, food processing plants, and other scenarios requiring precise quantitative liquid extraction. Its elimination of complex electrical control systems and purely mechanical structure design reduces equipment costs and failure rates. Furthermore, its low operational threshold and ease of promotion and use effectively meet the practical needs for precise quantitative liquid extraction in various scenarios, demonstrating high practicality and market application value. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0037] Figure 2 for Figure 1 Enlarged schematic diagram of the structure at point A in the middle;

[0038] Figure 3 for Figure 1 Enlarged schematic diagram of the structure at point B;

[0039] Figure 4 This is a schematic diagram showing the connection between the extrusion rod and the extruder structure of the present invention;

[0040] Figure 5 This is a cross-sectional view of the extrusion rod and extruder structure of the present invention;

[0041] Figure 6 This is a cross-sectional view of the quantitative sleeve and connecting sleeve structure of the present invention;

[0042] Figure 7 for Figure 6 Enlarged schematic diagram of the structure at point C;

[0043] Figure 8 for Figure 6 Enlarged schematic diagram of the structure at point D;

[0044] Figure 9 This is a cross-sectional view of the second through-hole structure of the present invention;

[0045] Figure 10 This is a schematic diagram of the tie rod structure of the present invention;

[0046] Figure 11 This is a cross-sectional view of the overall structure of the present invention.

[0047] In the picture:

[0048] 1. Measuring sleeve; 2. Extrusion rod; 3. Extruder; 4. Threaded groove; 5. Pull rod; 6. Return spring; 7. Positioning hole; 8. Scale line; 9. Liquid storage chamber; 10. Sealing ring; 11. Piston; 12. Limiting ring; 13. Positioning ring; 15. Sliding hole; 16. Threaded ring; 17. Second through hole; 18. Limiting groove; 19. Limiting block; 20. Limiting sleeve; 21. Positioning line; 22. Slot; 23. Rotating groove; 24. Relief groove; 25. Relief block. Detailed Implementation

[0049] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0050] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0051] like Figures 1-11 As shown, this application provides a submucosal injection device for digestive endoscopy, including: a quantitative sleeve 1, which has a hollow cylindrical structure, and a threaded ring 16 is provided at the bottom end of the inner side wall of the quantitative sleeve 1;

[0052] The extruder 3 is disposed inside the metering sleeve 1, and the outer surface of the extruder 3 is provided with a threaded groove 4 that mates with the threaded ring 16;

[0053] A limiting sleeve 20 is disposed inside the metering sleeve 1, and one end of the limiting sleeve 20 is inserted into the interior of the extruder 3;

[0054] The extrusion rod 2 is slidably disposed inside the limiting sleeve 20, and one end of the extrusion rod 2 is connected to the piston 11.

[0055] In this embodiment: by cooperating with the threaded groove 4 and the threaded ring 16, the distance between the bottom end of the limiting sleeve 20 and the piston 11 is adjusted. When the piston 11 is driven to extract the liquid medicine by pulling the squeezing rod 2, the limiting sleeve 20 can limit the movement distance of the piston 11, thereby accurately controlling the amount of liquid medicine extracted.

[0056] Specifically, such as Figure 1 and Figures 4-6 As shown, the outer diameter of the extruder 3 matches the inner diameter of the metering sleeve 1;

[0057] The threaded groove 4 has a spiral structure, and the spacing between two adjacent turns of the threaded groove 4 is the same.

[0058] The threaded ring 16 is screwed into the inside of the threaded groove 4, and the metering sleeve 1 is rotatably connected to the extruder 3 through the cooperation of the threaded ring 16 and the threaded groove 4.

[0059] In this embodiment: the metering sleeve 1 is rotatably connected to the extruder 3 through the cooperation of the threaded ring 16 and the threaded groove 4.

[0060] Specifically, such as Figure 3 As shown, each thread groove 4 has a scale line 8 at its center, and the distance between any two sets of adjacent scale lines 8 is the same.

[0061] A positioning line 21 is provided at the bottom center of the quantitative sleeve 1, and the positioning line 21 and the scale line 8 are arranged perpendicularly.

[0062] In this embodiment, the displacement of the quantitative sleeve 1 relative to the extruder 3 is controlled by the cooperation of the positioning line 21 and the scale line 8.

[0063] Specifically, such as Figure 2 and Figures 8-10 As shown, a second through hole 17 is provided at one end of the metering sleeve 1 near the positioning line 21, and the second through hole 17 penetrates the metering sleeve 1;

[0064] A pull rod 5 is inserted into the inside of the second through hole 17, and a return spring 6 is sleeved on the outer surface of the pull rod 5. The two ends of the return spring 6 are respectively connected to the metering sleeve 1 and the end of the pull rod 5.

[0065] The extruder 3 has a positioning hole 7 at the end position corresponding to the pull rod 5. Multiple sets of positioning holes 7 are provided, and the multiple sets of positioning holes 7 are evenly distributed between two adjacent sets of scale lines 8.

[0066] The spacing between two adjacent sets of positioning holes 7 is the same as the distance between two adjacent sets of scale lines 8;

[0067] The outer surface of the pull rod 5 is provided with a relief block 25, and the inner wall of the second through hole 17 is provided with a rotating groove 23 corresponding to the position of the relief block 25.

[0068] The clearance block 25 is slidably engaged inside the rotating groove 23, and the two ends of the rotating groove 23 are respectively connected to the slot 22 and the clearance groove 24. The internal size of the slot 22 and the clearance groove 24 are adapted to the size of the clearance block 25.

[0069] The length of the clearance groove 24 is longer than the length of the slot 22.

[0070] In this embodiment: the quantitative sleeve 1 is fixed by the cooperation of the elastically set pull rod 5 and the positioning hole 7. After rotating to a suitable height, the pull rod 5 is pressed down. At this time, the end of the pull rod 5 is inserted into the interior of the corresponding positioning hole 7 to fix the quantitative sleeve 1. Then, the pull rod 5 is rotated, and the pull rod 5 drives the relief block 25 to move from the rotating groove 23 to the inside of the slot 22, thus completing the limitation of the elastically set pull rod 5.

[0071] Specifically, such as Figures 5-7 as well as Figure 11 As shown, the extruder 3 has a liquid storage chamber 9 inside, and the extrusion rod 2 is inserted into the liquid storage chamber 9;

[0072] The piston 11 is slidably disposed inside the liquid storage chamber 9 via the extrusion rod 2, and a limiting ring 12 is provided inside the liquid storage chamber 9. The limiting ring 12 is fixedly disposed at the bottom end of the liquid storage chamber 9, and the position of the limiting ring 12 is flush with the bottom end of the threaded groove 4.

[0073] The limiting sleeve 20 has a sliding hole 15 at the position corresponding to the liquid storage cavity 9. The limiting sleeve 20 is inserted between the extruder 3 and the extrusion rod 2 through the sliding hole 15.

[0074] A sealing ring 10 is provided at the end of the liquid storage chamber 9 at a position corresponding to the position of the limiting sleeve 20;

[0075] A positioning ring 13 is provided on the inner wall of the metering sleeve 1 at the end position corresponding to the end position of the limiting sleeve 20, and a limiting groove 18 is provided on the side wall of the positioning ring 13 near the limiting sleeve 20.

[0076] The limiting groove 18 is rotatably provided with a limiting block 19, which is connected to the limiting sleeve 20;

[0077] The limiting sleeve 20 is rotatably connected to the metering sleeve 1 through the cooperation of the limiting groove 18 and the limiting block 19.

[0078] In this embodiment: the metering sleeve 1 drives the limiting sleeve 20 to move inside the liquid storage chamber 9, thereby limiting and fixing the pulling length of the piston 11, and thus controlling the amount of medicine extracted.

[0079] The sealing ring 10 ensures a seal between the limiting sleeve 20 and the extruder 3;

[0080] The limiting sleeve 20 and the metering sleeve 1 are rotatably connected by the limiting block 19. When adjusting the distance between the bottom end of the limiting sleeve 20 and the piston 11 through the cooperation of the threaded groove 4 and the threaded ring 16, the limiting sleeve 20 does not need to rotate inside the liquid storage cavity 9, thereby reducing the friction between the limiting sleeve 20 and the sealing ring 10, reducing the wear of the limiting sleeve 20, and preventing gaps from appearing between the limiting sleeve 20 and the sealing ring 10.

[0081] Specifically, this scheme is as follows: by cooperating with the threaded groove 4 and the threaded ring 16, the distance between the bottom end of the limiting sleeve 20 and the piston 11 is adjusted. The capacity of the liquid storage chamber 9 can be controlled by cooperating with the scale line 8 and the positioning line 21. After the adjustment is completed, the pull rod 5 is pressed down. At this time, the end of the pull rod 5 is inserted into the interior of the corresponding positioning hole 7 to limit and fix the metering sleeve 1. Then, the pull rod 5 is rotated, and the pull rod 5 drives the relief block 25 to move from the rotating groove 23 to the inside of the slot 22, thus completing the limiting of the elastically set pull rod 5.

[0082] Then, insert the end of the squeezer 3 into the liquid medicine, and then pull the squeeze rod 2. The squeeze rod 2 drives the piston 11 to move, accurately extracting the liquid medicine and then injecting it into the submucosal membrane.

[0083] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary; within the framework of this invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.

[0084] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A submucosal injection device for digestive endoscopy, characterized in that, include: The metering sleeve (1) has a hollow cylindrical structure, and a threaded ring (16) is provided at the bottom of the inner side wall of the metering sleeve (1). The extruder (3) is located inside the metering sleeve (1), and the outer surface of the extruder (3) is provided with a threaded groove (4) that mates with the threaded ring (16). A limiting sleeve (20) is disposed inside the metering sleeve (1), and one end of the limiting sleeve (20) is inserted into the inside of the extruder (3); The extrusion rod (2) is slidably disposed inside the limiting sleeve (20), and one end of the extrusion rod (2) is connected to a piston (11).

2. The submucosal injection device for digestive endoscopy according to claim 1, characterized in that, The outer diameter of the extruder (3) matches the inner diameter of the metering sleeve (1); The threaded groove (4) has a spiral structure, and the spacing between two adjacent turns of the threaded groove (4) is the same. Each turn of the threaded groove (4) has a scale line (8) at its center, and the spacing between two sets of adjacent scale lines (8) is the same.

3. The submucosal injection device for digestive endoscopy according to claim 2, characterized in that, The threaded ring (16) is screwed into the inside of the threaded groove (4), and the metering sleeve (1) is rotatably connected to the extruder (3) through the cooperation of the threaded ring (16) and the threaded groove (4); The bottom center of the quantitative sleeve (1) is provided with a positioning line (21), and the positioning line (21) and the scale line (8) are arranged vertically.

4. The submucosal injection device for digestive endoscopy according to claim 3, characterized in that, The metering sleeve (1) has a second through hole (17) at one end near the positioning line (21), and the second through hole (17) penetrates the metering sleeve (1).

5. The submucosal injection device for digestive endoscopy according to claim 4, characterized in that, A pull rod (5) is inserted into the second through hole (17), and a return spring (6) is sleeved on the outer surface of the pull rod (5). The two ends of the return spring (6) are respectively connected to the metering sleeve (1) and the end of the pull rod (5).

6. The submucosal injection device for digestive endoscopy according to claim 5, characterized in that, The extruder (3) has a positioning hole (7) at the end position corresponding to the pull rod (5). There are multiple sets of positioning holes (7), and the multiple sets of positioning holes (7) are evenly distributed between two adjacent sets of scale lines (8). The distance between two adjacent sets of positioning holes (7) is the same as the distance between two adjacent sets of scale lines (8).

7. The submucosal injection device for digestive endoscopy according to claim 5, characterized in that, The outer surface of the pull rod (5) is provided with a relief block (25), and the inner wall of the second through hole (17) is provided with a rotating groove (23) at the position corresponding to the relief block (25). The clearance block (25) is slidably engaged inside the rotating groove (23), and the two ends of the rotating groove (23) are respectively connected to the slot (22) and the clearance groove (24). The internal size of the slot (22) and the clearance groove (24) are adapted to the size of the clearance block (25). The length of the clearance groove (24) is longer than the length of the card slot (22).

8. The submucosal injection device for digestive endoscopy according to claim 6, characterized in that, The extruder (3) has a liquid storage chamber (9) inside, and the extrusion rod (2) is inserted into the liquid storage chamber (9); The piston (11) is slidably disposed inside the liquid storage chamber (9) via the extrusion rod (2), and a limiting ring (12) is provided inside the liquid storage chamber (9). The limiting ring (12) is fixedly disposed at the bottom end of the liquid storage chamber (9), and the position of the limiting ring (12) is flush with the bottom end of the threaded groove (4).

9. The submucosal injection device for digestive endoscopy according to claim 8, characterized in that, The limiting sleeve (20) has a sliding hole (15) at the position corresponding to the liquid storage cavity (9). The limiting sleeve (20) is inserted between the extruder (3) and the extrusion rod (2) through the cooperation of the sliding hole (15). A sealing ring (10) is provided at the end of the liquid storage chamber (9) at the position corresponding to the limiting sleeve (20).

10. The submucosal injection device for digestive endoscopy according to claim 9, characterized in that, A positioning ring (13) is provided on the inner wall of the metering sleeve (1) at the end position corresponding to the end position of the limiting sleeve (20), and a limiting groove (18) is provided on the side wall of the positioning ring (13) near the limiting sleeve (20). The limiting groove (18) is rotatably provided with a limiting block (19), and the limiting block (19) is connected to the limiting sleeve (20); The limiting sleeve (20) is rotatably connected to the quantitative sleeve (1) through the cooperation of the limiting groove (18) and the limiting block (19).

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