Endoscope puncture needle with quantitative dosing function

Abstract

The invention relates to the technical field of medical treatment, in particular to an endoscope puncture needle with a quantitative dosing function, which comprises a grip, an anti-slip groove is arranged on the grip, a puncture needle is mounted at the bottom of the grip, and an injector fixing ring is fixedly mounted on the outer side wall of the grip and is of a C-shaped structure. The precise quantifying mechanism is arranged and comprises an adjustable third sliding block and a milliliter scale line, a doctor can precisely set the injection dosage before dosing, pushing is stopped when the second sliding block makes contact with the preset third sliding block in the pushing process, the accuracy of the dosing dosage is ensured, and the dosing accuracy is improved. The device is simple in structure and particularly suitable for drug treatment scenes needing accurate dosage, meanwhile, a mechanical drug delivery mechanism is adopted, a first threaded rod is driven by a motor to drive a second sliding block and a pressing plate to be stably pushed, and uneven dosage or tissue damage caused by hand shaking during manual injection is avoided. The whole propelling process is stable and controllable, and the safety of an operation is remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the medical technology field, in particular to an endoscope puncture needle with a dosing function. BACKGROUND

[0002] Endoscopy technology is increasingly widely used in the medical field, especially in the diagnosis and treatment of diseases in the digestive tract, respiratory tract and other cavities. In endoscopic surgery, it is often necessary to inject drugs such as hemostatic agents, sclerosing agents or anticancer drugs into the target tissue through a puncture needle. The current common endoscopic puncture needle drug delivery method mainly relies on the doctor manually pushing the syringe. This method has obvious limitations: first, manual injection is difficult to accurately control the drug dosage, especially in the case of micro-dosing, the dosage deviation may affect the treatment effect, second, when operating in a narrow cavity, the stability of the doctor's hand is affected, which may cause uneven drug delivery or tissue damage, in addition, the traditional puncture needle lacks a reliable dose setting mechanism, which cannot achieve accurate pre-setting before drug delivery, increasing the risk of surgery.

[0003] Although there are some puncture needles with simple push mechanisms in the prior art, these mechanisms are mostly complex in structure, inconvenient to operate, and difficult to effectively cooperate with conventional syringes. Some devices with dosing functions are often bulky and not suitable for use in the narrow space of endoscopic work. Some other solutions use electronic control systems to achieve dosing, but the cost is high and the reliability is affected by electronic components. Therefore, there is an urgent need in the art for an endoscopic puncture needle that is compact in structure, easy to operate and can accurately dose, to solve the problems of insufficient drug delivery accuracy and poor operation stability in the prior art. SUMMARY

[0004] In order to overcome the deficiencies of the prior art, the present application provides an endoscopic puncture needle with a dosing function.

[0005] To solve the above technical problems, the present application provides the following technical solutions: An endoscopic puncture needle with a dosing function, comprising a handle, a slip groove is provided on the handle, a puncture needle is installed at the bottom of the handle, a syringe fixing ring is fixedly installed on the outer side wall of the handle, the syringe fixing ring is arranged in a C-shaped structure, the syringe fixing ring is used to fix and limit the syringe body, a plurality of groups of equally spaced clamping grooves are formed in the outer side wall of the syringe fixing ring, the clamping grooves are used to fixedly connect the tail of the syringe, a supporting plate is fixedly installed at the bottom of the syringe fixing ring, an injection hole for inserting the nipple of the syringe is formed in the supporting plate, a liquid guide tube is fixedly installed at the bottom of the injection hole, the free end of the liquid guide tube is in communication with the top end of the puncture needle, a mechanical drug delivery mechanism is installed on the syringe fixing ring, a precise dosing mechanism is arranged on the mechanical drug delivery mechanism, and a positioning adjusting mechanism is arranged at the connection between the mechanical drug delivery mechanism and the syringe fixing ring.

[0006] As a preferred technical scheme of the present application, the inner side wall of the injector fixing ring is provided with a mounting groove, the mechanical dosing mechanism is slidingly mounted in the mounting groove, a movable groove is provided on one side of the injector fixing ring at the mounting groove, and the accurate dosing mechanism is slidingly mounted in the movable groove, and the bottom of the mechanical dosing mechanism is fixedly connected with the accurate dosing mechanism.

[0007] As a preferred technical scheme of the present application, the positioning adjusting mechanism comprises a first sliding groove, a first sliding block, a lever, a pull ring, a connecting rod, a mounting shell, a mounting plate, a positioning tooth, a reset spring and a positioning slot, the front and rear inner walls of the mounting groove are provided with the first sliding groove, the first sliding block is slidingly mounted in the first sliding groove, the corresponding side wall of the first sliding block is fixedly connected with the mechanical dosing mechanism, the front and rear sides of the mechanical dosing mechanism are provided with the positioning slot, the top of the injector fixing ring is fixedly provided with the mounting shell, the mounting shell is located at the front and rear sides of the mechanical dosing mechanism, the positioning tooth is slidingly mounted in the mounting shell, the positioning tooth is meshed with the positioning slot, the mounting plate is fixedly installed at one end of the positioning tooth inside the mounting shell, the reset spring is fixedly installed on the mounting plate, the free end of the reset spring is fixedly connected with the inner side wall of the mounting shell, the connecting rod is fixedly installed at the center of the mounting plate, the connecting rod transversely penetrates through the mounting shell and extends to the outside of the mounting shell, the pull ring is fixedly installed at one end of the connecting rod outside the mounting shell, and the lever for pulling the pull ring is arranged below the pull ring outside the injector fixing ring.

[0008] As a preferred technical scheme of the present application, the mechanical dosing mechanism comprises a mounting rod, a second sliding block, a second sliding groove, a first threaded rod, a motor and a pressing plate, the second sliding groove is provided on the mounting rod, the first threaded rod is rotatably installed at the inner top and bottom of the second sliding groove, the motor is fixedly installed on the top of the mounting rod, the output end of the motor longitudinally penetrates through the mounting rod and is fixedly connected with the first threaded rod, the second sliding block is arranged in the second sliding groove, the second sliding block is sleeved on the first threaded rod and is threadedly connected with the first threaded rod, the outer side wall of the second sliding block is fixedly connected with the pressing plate, the pressing plate is arranged in close contact with the tail of the injector piston rod, and the diameter of the pressing plate is smaller than the diameter of the injector fixing ring.

[0009] As a preferred technical scheme of the present application, the precise dosing mechanism comprises a movable rod, a third sliding groove, a third sliding block, a second threaded rod, an adjusting disc, a milliliter scale and a pointer, the movable rod is provided with the third sliding groove, the third sliding groove has the same size structure as the second sliding groove and the position of the third sliding groove corresponds to the second sliding groove, the inner side top and bottom of the third sliding groove are rotatably provided with the second threaded rod, the top of the movable rod is rotatably provided with the adjusting disc, the outer side wall of the adjusting disc is fixedly provided with the pointer, the top of the movable rod is provided with the milliliter scale outside the adjusting disc, the milliliter scale corresponds to the pointer, the third sliding block is arranged in the third sliding groove, the third sliding block extends into the second sliding groove, the third sliding block is sleeved on the second threaded rod and is threadedly connected with the second threaded rod, and the third sliding block is sleeved on the first threaded rod at one end in the second sliding groove.

[0010] Compared with the prior art, the present application has the following beneficial effects: 1、In the present application, by setting the precise dosing mechanism, including the adjustable third sliding block and the milliliter scale, the doctor can accurately set the injection dose before administration, and when the second sliding block contacts the preset third sliding block during the advancing process, the advancing is stopped, ensuring the accuracy of the administration dose, especially suitable for drug treatment scenarios that require accurate dosage, and at the same time, the mechanical administration mechanism is adopted, the first threaded rod is driven by the motor to smoothly advance the second sliding block and the pressing plate, avoiding the uneven dosage or tissue damage caused by hand shaking during manual injection. The whole advancing process is stable and controllable, significantly improving the safety of the operation.

[0011] 2、In the present application, the precise dosing mechanism cooperates with the milliliter scale through the adjusting disc and the pointer, making the dose setting process intuitive and easy to understand, greatly simplifying the operation process. The positioning adjustment mechanism cooperates with the pull ring through the pull rod, realizing the quick adjustment and reliable locking of the position of the mechanical administration mechanism, improving the operation efficiency, and the injector fixing ring adopts a C-shaped structure and is provided with multiple clamping grooves, which can firmly fix injectors of different specifications, ensuring the universality of the device. The positioning adjustment mechanism can flexibly adjust the initial position of the mechanical administration mechanism through the meshing cooperation of the positioning teeth and the positioning clamping groove, adapting to the use requirements of injectors of different specifications.

[0012] 3、In the present application, the whole device integrates the mechanical administration mechanism, the precise dosing mechanism and the positioning adjustment mechanism on the handle, which is compact in structure and suitable for use in the narrow space of endoscopic work. The pure mechanical transmission mode is adopted, avoiding the reliability problem of electronic components and ensuring long-term stable operation in the medical environment. Through the mechanical administration mode, the requirement for the operation skill of the doctor is reduced, even the doctor with less experience can also complete the precise administration operation, which is helpful for standardizing the medical process and improving the consistency of treatment effect. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 Structure diagram of the present application; Figure 2 Structure diagram of injection hole position of the present application; Figure 3 Structure diagram of movable slot position of the present application; Figure 4 Structure diagram of mechanical dosing mechanism of the present application; Figure 5 Structure diagram of precise dosing mechanism of the present application; Figure 6 Structure diagram of positioning adjustment mechanism of the present application; Figure 7 Structure diagram of A part of the present application.

[0014] 1, injector fixing ring; 2, clamping groove; 3, liquid guide pipe; 4, handle; 5, puncture needle; 6, positioning adjustment mechanism; 7, motor; 8, pressing plate; 9, supporting plate; 10, injection hole; 11, movable slot; 12, first sliding groove; 13, mounting groove; 14, positioning clamping groove; 15, second sliding groove; 16, first threaded rod; 17, second sliding block; 18, mounting rod; 19, third sliding block; 20, first sliding block; 21, movable rod; 22, second threaded rod; 23, third sliding groove; 24, mounting shell; 25, connecting rod; 26, pull ring; 27, push rod; 28, return spring; 29, positioning tooth; 30, mounting plate; 31, adjustment disc; 32, milliliter scale line; 33, pointer. DETAILED DESCRIPTION

[0015] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the following specific embodiments are further described, but the following embodiments are only preferred embodiments of the present application, not all. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application. The experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.

[0016] Embodiment: as Figures 1-7As shown, an endoscope puncture needle with a dosing function, comprising a handle 4, the handle 4 is provided with an anti-skid groove, the bottom of the handle 4 is provided with a puncture needle 5, the outer side wall of the handle 4 is fixedly provided with a syringe fixing ring 1, the syringe fixing ring 1 is provided in a C-shaped structure, the syringe fixing ring 1 is used for fixing and limiting the syringe body, a plurality of groups of equidistantly arranged clamping grooves 2 are formed in the outer side wall of the syringe fixing ring 1, the clamping grooves 2 are used for fixing and clamping the tail of the syringe, a supporting plate 9 is fixedly installed at the bottom of the syringe fixing ring 1, an injection hole 10 for inserting the nipple body of the syringe is formed in the supporting plate 9, a liquid guide pipe 3 is fixedly installed at the bottom of the injection hole 10, the free end of the liquid guide pipe 3 is in communication with the top end of the puncture needle 5, a mechanical dosing mechanism is installed on the syringe fixing ring 1, a precise dosing mechanism is provided on the mechanical dosing mechanism, and a positioning adjusting mechanism 6 is provided at the connection between the mechanical dosing mechanism and the syringe fixing ring 1.

[0017] In actual use, when the endoscope puncture needle is put into use, first, the liquid medicine to be injected is placed on the syringe fixing ring 1 through the syringe, at this time, the nipple body of the syringe is inserted into the injection hole 10, at this time, the user drives the positioning adjusting mechanism 6, so that the mechanical dosing mechanism can be attached to the tail of the syringe push rod, at this time, according to the milligrams to be injected, the precise dosing mechanism is adjusted to the accurate value, at this time, the user inserts the puncture needle 5 into the outer needle that has been completed, when the puncture needle 5 reaches the injection position, at this time, the user drives the mechanical dosing mechanism through the handle 4 to complete the injection of the liquid medicine.

[0018] As shown in Figure 1 and 2 , an installation groove 13 is formed in the inner side wall of the syringe fixing ring 1, the mechanical dosing mechanism is slidably installed in the installation groove 13, a movable groove 11 is formed in one side of the syringe fixing ring 1, the precise dosing mechanism is slidably installed in the movable groove 11, and the bottom of the mechanical dosing mechanism and the precise dosing mechanism are fixedly connected.

[0019] When the mechanical dosing mechanism is adjusted, the precise dosing mechanism moves at the same time, so as to avoid the deviation of the medicine amount during dosing.

[0020] As shown in Figure 2 , Figure 3 and Figure 6As shown, the positioning adjusting mechanism 6 comprises a first sliding groove 12, a first sliding block 20, a lever 27, a pull ring 26, a connecting rod 25, a mounting shell 24, a mounting plate 30, a positioning tooth 29, a reset spring 28 and a positioning clamping groove 14, the front and rear inner walls of the mounting groove 13 are provided with the first sliding groove 12, the first sliding groove 12 is slidably provided with the first sliding block 20, the corresponding side wall of the first sliding block 20 is fixedly connected with the mechanical dosing mechanism, the front and rear sides of the mechanical dosing mechanism are provided with the positioning clamping groove 14, the top of the syringe fixing ring 1 is fixedly provided with the mounting shell 24, the mounting shell 24 is located at the front and rear sides of the mechanical dosing mechanism, the mounting shell 24 is slidably provided with the positioning tooth 29, the positioning tooth 29 is engaged with the positioning clamping groove 14, the mounting plate 30 is fixedly installed at one end of the mounting shell 24, the reset spring 28 is fixedly installed on the mounting plate 30, the free end of the reset spring 28 is fixedly connected with the inner wall of the mounting shell 24, the connecting rod 25 is fixedly installed at the center of the mounting plate 30, the connecting rod 25 transversely penetrates through the mounting shell 24 and extends to the outside of the mounting shell 24, the pull ring 26 is fixedly installed at one end of the connecting rod 25 outside the mounting shell 24, and the lever 27 for pulling the pull ring 26 is arranged below the pull ring 26 outside the syringe fixing ring 1.

[0021] The user presses the lever 27 to pull the pull ring 26 at the end of the lever 27, so that the user can adjust the position of the mechanical dosing mechanism, and after the adjustment is completed, the user's hand is separated from the lever 27. Since the mounting plate 30 connected with the positioning tooth 29 is provided with the reset spring 28, when the lever 27 is released, the reset spring 28 is affected by the elastic potential energy, so that the positioning tooth 29 extends out of the mounting shell 24 and is engaged with the positioning clamping groove 14 on the mechanical dosing mechanism. At this time, the fixing and limiting of the mechanical dosing mechanism can be completed.

[0022] As shown in Figure 4 The mechanical dosing mechanism comprises a mounting rod 18, a second sliding block 17, a second sliding groove 15, a first threaded rod 16, a motor 7 and a pressing plate 8, the mounting rod 18 is provided with the second sliding groove 15, the inner top and bottom of the second sliding groove 15 are rotatably provided with the first threaded rod 16, the top of the mounting rod 18 is fixedly provided with the motor 7, the output end of the motor 7 longitudinally penetrates through the mounting rod 18 and is fixedly connected with the first threaded rod 16, the second sliding block 17 is arranged in the second sliding groove 15, the second sliding block 17 is sleeved on the first threaded rod 16 and is threadedly connected with the first threaded rod 16, the outer side wall of the second sliding block 17 is fixedly connected with the pressing plate 8, the pressing plate 8 is in contact with the tail of the syringe piston rod, and the diameter of the pressing plate 8 is smaller than the diameter of the syringe fixing ring 1.

[0023] When medication is needed, the motor 7 drives the first threaded rod 16 to rotate. Since the second slider 17 is limited by the second groove 15, it cannot rotate. At this time, the second slider 17 moves longitudinally within the second groove 15. The second slider 17 drives the pressure plate 8 to squeeze the syringe plunger, thereby completing the injection of the drug solution.

[0024] like Figure 5 and Figure 7 As shown, the precise metering mechanism includes a movable rod 21, a third slide groove 23, a third slider 19, a second threaded rod 22, an adjusting plate 31, milliliter scale lines 32, and a pointer 33. The movable rod 21 has a third slide groove 23, which is the same size and structure as the second slide groove 15, and the position of the third slide groove 23 corresponds to that of the second slide groove 15. The second threaded rod 22 is rotatably mounted on the top and bottom of the inner side of the third slide groove 23. The adjusting plate 31 is rotatably mounted on the top of the movable rod 21, and the outer wall of the adjusting plate 31 is fixed. A pointer 33 is fixedly installed. The top of the movable rod 21 is located on the outside of the adjustment plate 31 and has a milliliter scale line 32. The milliliter scale line 32 corresponds to the pointer 33. The third slide groove 23 houses the third slider 19. The third slider 19 extends into the second slide groove 15. The third slider 19 is sleeved on the second threaded rod 22 and is threadedly connected to the second threaded rod 22. One end of the third slider 19 is located inside the second slide groove 15 and is sleeved on the first threaded rod 16. The third slider 19 and the first threaded rod 16 are slidably connected.

[0025] After the mechanical drug delivery mechanism is adjusted, the injection dosage is set in milligrams. The user rotates the adjustment disc 31, causing the pointer 33 on the adjustment disc 31 to rotate to the desired scale. When the adjustment disc 31 rotates, the second threaded rod 22 rotates accordingly. Since the third slider 19 cannot rotate, it moves longitudinally within the third slide groove 23. The third slider 19 stops at the desired position within the second slide groove 15, which corresponds to the milliliter on the scale. When injection is performed, the second slider 17 moves longitudinally and engages with the third slider 19, at which point the motor 7 stops operating, completing the quantitative injection.

[0026] Working principle: In use, first place the syringe containing the medication into the syringe retaining ring 1, ensuring the syringe barrel is securely locked into the appropriate slot 2. Simultaneously, accurately insert the syringe tip into the injection hole 10 on the support plate 9. At this time, the piston rod tail of the syringe remains in contact with the pressure plate 8 of the mechanical drug delivery mechanism. If the initial position needs to be adjusted, medical personnel can press the lever 27 to activate the pull ring 26. Through the connecting rod 25, the positioning teeth 29 overcome the elastic force of the return spring 28 and disengage from the positioning slot 14, allowing the mechanical drug delivery mechanism to slide to the appropriate position. After releasing the lever 27, the positioning teeth 29 re-engage and lock under the action of the return spring 28. After preparation, according to the required dosage of medication, rotate the adjusting disc 31 so that the pointer 33 points to the corresponding milliliter scale line 32. The rotation of the adjusting disc 31 drives the second threaded rod 22 to rotate. Because the sliding engagement between the third slider 19 and the third groove 23 restricts its rotation, the third slider 19 is forced to move precisely axially along the second threaded rod 22, positioning itself within the second groove 15 to the predetermined position. This position precisely corresponds to the required injection dose, forming a reliable mechanical limit. The puncture needle 5 is inserted into the pre-positioned outer sheath and reaches the target tissue under endoscopic guidance. The motor 7 is activated, rotating the first threaded rod 16 and driving the second slider 17 to move smoothly downwards along the second groove 15, pushing the pressure plate 8 to squeeze the syringe piston rod. The medication is accurately injected into the target tissue through the injection port 10, the guide tube 3, and the puncture needle 5. When the second slider 17 descends to contact the preset third slider 19, the generation of mechanical resistance indicates that the preset dosage has been reached, and the motor 7 automatically stops, completing the precise quantitative drug administration.

[0027] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. An endoscopic puncture needle with a quantitative drug delivery function, comprising a handle (4) and a puncture needle (5) fixed to its base, characterized in that: A syringe retaining ring (1) for fixing the syringe barrel is fixedly installed on the outside of the grip (4). A support plate (9) is provided at the bottom of the syringe retaining ring (1). An injection hole (10) for inserting the syringe nipple is provided on the support plate (9). A liquid guide tube (3) is connected to the bottom of the injection hole (10). The free end of the liquid guide tube (3) is connected to the top of the puncture needle (5). A mechanical drug delivery mechanism for pushing the syringe piston rod is installed on the syringe retaining ring (1). A precise quantitative mechanism for setting the drug delivery amount is provided on the mechanical drug delivery mechanism. A positioning adjustment mechanism (6) for adjusting the initial position of the mechanical drug delivery mechanism is provided between the mechanical drug delivery mechanism and the syringe retaining ring (1).

2. The endoscopic puncture needle with quantitative drug delivery function according to claim 1, characterized in that, The syringe fixing ring (1) has an installation groove (13) on its inner side wall. The mechanical drug delivery mechanism is slidably installed in the installation groove (13). The syringe fixing ring (1) has a movable groove (11) on one side of the installation groove (13). The precise metering mechanism is slidably installed in the movable groove (11), and the bottom of the precise metering mechanism is fixedly connected to the bottom of the mechanical drug delivery mechanism.

3. An endoscopic puncture needle with quantitative drug delivery function according to claim 2, characterized in that, The positioning adjustment mechanism (6) includes a first slide groove (12), a first slider (20), a lever (27), a pull ring (26), a connecting rod (25), a mounting shell (24), a mounting plate (30), positioning teeth (29), a return spring (28), and a positioning slot (14). The first slide groove (12) is provided on the front and rear inner walls of the mounting groove (13). The first slider (20) is slidably installed in the first slide groove (12). The corresponding side wall of the first slider (20) is fixedly connected to the mechanical drug delivery mechanism. The positioning slot (14) is provided on the front and rear sides of the mechanical drug delivery mechanism. The mounting shell (24) is fixedly installed on the top of the syringe fixing ring (1). The positioning teeth (29) are slidably installed in the mounting shell (24). The positioning teeth (29) are engaged with the positioning slots (14). The positioning teeth (29) are located inside the mounting shell (24) and one end is fixedly mounted with the mounting plate (30). The mounting plate (30) is fixedly mounted with the return spring (28). The free end of the return spring (28) is fixedly connected to the inner wall of the mounting shell (24). The connecting rod (25) is fixedly mounted in the center of the mounting plate (30). The connecting rod (25) passes through the mounting shell (24) laterally and extends to its outside. The connecting rod (25) is fixedly mounted with the pull ring (26) at one end outside the mounting shell (24). The syringe fixing ring (1) is located outside the pull ring (26) and below it is provided with a lever (27) for moving the pull ring (26).

4. An endoscopic puncture needle with quantitative drug delivery function according to claim 2, characterized in that, The mechanical drug delivery mechanism includes a mounting rod (18), a second slider (17), a second groove (15), a first threaded rod (16), a motor (7), and a pressure plate (8). The mounting rod (18) has a second groove (15). The first threaded rod (16) is rotatably mounted on the top and bottom of the inner side of the second groove (15). The motor (7) is fixedly mounted on the top of the mounting rod (18). The output end of the motor (7) passes through the mounting rod (18) longitudinally and is fixedly connected to the first threaded rod (16). The second slider (17) is provided in the second groove (15). The second slider (17) is sleeved on the first threaded rod (16) and threadedly connected to it. The outer side wall of the second slider (17) is fixedly connected to the pressure plate (8). The pressure plate (8) is used to fit against the tail of the syringe piston rod.

5. An endoscopic puncture needle with quantitative drug delivery function according to claim 4, characterized in that, The precise metering mechanism includes a movable rod (21), a third slide groove (23), a third slider (19), a second threaded rod (22), an adjusting plate (31), milliliter scale lines (32), and a pointer (33). The movable rod (21) has the third slide groove (23), which corresponds to the second slide groove (15). The second threaded rod (22) is rotatably mounted on the top and bottom of the inner side of the third slide groove (23). The adjusting plate (31) is rotatably mounted on the top of the movable rod (21). The pointer (33) is fixedly installed on the outer wall of the 1), and the top of the movable rod (21) is located on the outside of the adjustment plate (31) with the milliliter scale line (32). The third slider (19) is provided in the third groove (23). The third slider (19) extends into the second groove (15). The third slider (19) is sleeved on the second threaded rod (22) and threadedly connected to it. At the same time, one end of the third slider (19) located inside the second groove (15) is sleeved on the first threaded rod (16) and slidably connected to it.

6. An endoscopic puncture needle with quantitative drug delivery function according to claim 5, characterized in that, The third slider (19) extends into the second groove (15) and is sleeved on the first threaded rod (16), forming a sliding fit with the first threaded rod (16). The position of the third slider (19) in the second groove (15) determines the maximum stroke of the second slider (17).

7. An endoscopic puncture needle with quantitative drug delivery function according to claim 1, characterized in that, The syringe retaining ring (1) has a C-shaped structure, and several equally spaced slots (2) are provided on its outer side along the axial direction. The slots (2) are used to fix and snap the tail of syringes of different specifications.

8. An endoscopic puncture needle with quantitative drug delivery function according to claim 1, characterized in that, The grip (4) has anti-slip grooves on its surface, which are distributed along the circumference of the grip.

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