Modularized high-precision injector

Abstract

The utility model provides a modularized high-precision injector which aims at solving the problem that a traditional injector is insufficient in precision in the liquid medicine injection process. The injector comprises a main body, a liquid medicine bag, an adjusting pressing handle, a piston, a sliding block and a connector, the adjusting pressing handle is arranged at the top of the main body and used for accurately controlling the position of the piston through an adjusting screw rod, and therefore accurate control over the liquid medicine injection amount or the liquid suction amount is achieved. The liquid medicine bag is detachably connected to the interior of the body and connected with the connector through the puncture tube, and leakage-free transmission of liquid medicine is guaranteed. And the injection needle and the pipetting needle can be detachably connected with the connector, so that the switching between the injection function and the pipetting function is realized. The syringe is novel in structure, easy and convenient to operate, high in precision and reliability, particularly suitable for the requirement for precise dose control in experimental animal research and capable of being effectively applied to medical scenes.

Description

Technical Field

[0001] The utility model belongs to the field of medical instruments, and in particular relates to a modular high-precision syringe. Background Art

[0002] In the field of medical devices, especially in the application of liquid medicine injection, traditional syringes have great deficiencies in controlling the accuracy of injection volume. Existing syringes usually rely on manual adjustment of the pushing force of the piston to achieve injection volume control of the liquid medicine. This method relies on the operator's feel and experience, resulting in the actual injection volume of the liquid medicine being difficult to control accurately, especially in the injection process of trace drugs, which is more prone to large errors. In addition, traditional syringes often lack precise adjustment mechanisms in their structural design. The adjustment of the injection volume usually depends on the stroke length of the piston, and the control accuracy of the stroke is limited by the design and manufacturing accuracy of the device itself. For some drugs that require precise dosage control, traditional syringes are difficult to meet the needs, which may not only lead to drug waste, but also affect the research results of experimental animals and even bring safety hazards.

[0003] In the micro-drug injection of experimental animals, the piston push of traditional syringes is often unable to achieve fine adjustment. If the operator is not careful, it may lead to deviations in the injection volume, which in turn affects the accuracy of the experimental data. When injecting larger doses, traditional syringes are also difficult to ensure the consistency and stability of each injection due to design limitations. In general, the shortcomings of existing syringes in precision control not only increase the difficulty of operation, but also limit their application in experimental animal research and occasions requiring high-precision drug solution control. This lack of precision has become a major bottleneck restricting the further development of traditional syringes in experimental animal research and medical fields. Improved design is needed to achieve higher control accuracy to meet the needs of precise drug dosage management in experiments and clinical practice. Utility Model Content

[0004] In response to the deficiencies of the prior art, the utility model provides a modular high-precision syringe, which effectively solves the problem of precision control of traditional syringes in experimental animals and medical scenarios.

[0005] In order to solve the above problems, the technical solution adopted by the utility model is:

[0006] A modular high-precision syringe includes a syringe body, two left and right side handles are provided on the top of the main body, a connector is provided at the bottom of the main body, and a detachable medicine liquid bag is provided on the lower inner side of the main body, and the medicine liquid bag is used to store medicine liquid; an adjusting pressure handle is provided on the top of the main body to adjust the liquid output of the medicine liquid bag, and the adjusting pressure handle is used to control the single liquid output or inhalation volume of the medicine liquid bag by changing the position of the piston; it also includes an injection needle and a pipetting needle, and the injection needle and the pipetting needle can be detachably connected to the connector to realize the switching of injection and pipetting functions.

[0007] Preferably, a piston is provided on the inner side of the top of the medicine liquid bag, the piston is slidably connected to the medicine liquid bag, and a sealing ring is provided at the front end of the piston to ensure sealing;

[0008] A blocking membrane is provided at the bottom of the medicine liquid bag, which is punctured by the puncture tube when the medicine liquid bag is installed to ensure that the medicine liquid flows out.

[0009] Preferably, a connecting seat is provided at the lower inner part of the main body, a recessed groove for connecting the medicine bag is provided at the top of the connecting seat, a puncture tube is provided in the recessed groove, and the puncture tube is used to puncture the blocking membrane; the bottom end of the puncture tube is connected to the connector.

[0010] Preferably, a connecting slot is provided on the top of the piston; a slide rail is provided on the upper inner side of the main body, and a slider that can move up and down is slidably connected in the slide rail, and the bottom end of the slider is fixedly connected to the piston rod, and a connecting buckle is provided at the bottom end of the piston rod, and the connecting buckle realizes a firm connection between the piston and the piston rod by inserting and rotating the connecting slot; the connection method between the piston rod and the piston is a buckle type, which is convenient for disassembly and replacement.

[0011] Preferably, an adjusting screw is fixedly connected to the bottom end of the adjusting pressure handle, and the adjusting screw is connected to the slider through a thread. By rotating the adjusting pressure handle, the distance between the slider and the piston can be changed by adjusting the screw; when the adjusting pressure handle is pressed, the piston is pushed to control the single liquid discharge or inhalation volume of the medicine.

[0012] The utility model has novel structure, ingenious design, simple and convenient operation, and has the following advantages compared with the existing technology:

[0013] This device precisely controls the single-shot delivery or inhalation volume of medication by adjusting the distance between the pressure handle and the piston, significantly improving the accuracy of medication injections. While traditional syringes are prone to errors when injecting small doses of medication, this device, through a precise screw and slider mechanism, ensures consistent volume with each injection, meeting the clinical demand for high-precision medication dosage management.

[0014] This device features a modular design, with the drug capsule, needle, and pipetting components all removable and replaceable, greatly enhancing its flexibility and adaptability. Users can quickly replace components based on different usage scenarios, easily switching between injection and pipetting functions, reducing device costs while enhancing the convenience and efficiency of medical procedures.

[0015] Precise control: This syringe enables high-precision injection and aspiration of liquids in the microliter (µL) to milliliter (mL) range, ensuring accurate dosage every time. It is suitable for experimental animal research and medical applications that require precise dosage management.

[0016] Multiple drug administration: The design of this device allows for the absorption of a large volume of liquid medicine at one time (depending on the size of the liquid medicine sac), and can perform drug administration operations in batches, which greatly improves the efficiency of the operation and reduces the trouble of frequent aspiration.

[0017] No need for venting: Due to the closed design of the drug solution capsule and the precise connection mechanism, this syringe eliminates the steps of venting air and bubbles during use, thereby preventing air from directly entering the body of experimental animals or patients, further improving the safety of operation and the purity of the drug solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is an axonometric view of the modular high-precision syringe of the present invention in the first state.

[0019] Figure 2 This is an axonometric view of the modular high-precision syringe of the present invention in the second state.

[0020] Figure 3 This is a diagram of the internal structure of the modular high-precision syringe of the present utility model.

[0021] In the accompanying drawings: 1-main body, 2-display, 3-side handle, 4-adjusting screw, 5-adjusting pressure handle, 6-mounting sleeve, 7-slide cover, 8-handle, 9-injection needle, 10-pipette needle, 11-connector, 12-mounting port, 13-drug liquid bag, 14-slider, 15-slide rail, 16-piston rod, 17-piston, 18-connecting slot, 19-connecting buckle, 20-puncture tube, 21-connecting seat. DETAILED DESCRIPTION

[0022] The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.

[0023] like Figure 1-3As shown, the utility model provides a modular high-precision syringe, including a main body 1, a side handle 3, a connector 11, a liquid medicine capsule 13, an adjusting pressure handle 5, a piston 17, a slider 14, an adjusting screw 4, a connecting slot 18, a connecting buckle 19, a puncture tube 20, a connecting seat 21, an injection needle 9, a pipette needle 10 and a display 2. The syringe is designed to accurately control the injection or aspiration volume of the liquid medicine, and is particularly suitable for medical operations that require high-precision dosage control. Two left and right side handles 3 are provided on the top of the main body 1 to facilitate the operator's grip and control. A connector 11 is provided at the bottom of the main body 1. The connector 11 is used to be detachably connected to the injection needle 9 or the pipette needle 10, and the injection or pipetting function can be switched by replacing different needles. The liquid medicine capsule 13 is a detachable design, used to store liquid medicine to be injected or aspirated.

[0024] A piston 17 is provided on the inner side of the top of the medicine liquid capsule 13. The piston 17 is slidably connected to the medicine liquid capsule 13. A sealing ring is provided at its front end to ensure that the medicine liquid will not leak. The sealing ring not only prevents the medicine liquid from leaking, but also effectively reduces friction when the piston 17 moves, ensuring smooth operation. During use, the medicine liquid capsule 13 is first correctly installed on the connecting seat 21 on the inner side of the main body 1 to ensure that the medicine liquid capsule 13 and the puncture tube 20 are tightly docked. Then the piston 17 is connected to the slider 14 through the slide rail 15. The bottom end of the piston rod 16 is inserted into and locked in the connecting card groove 18 of the piston 17 through the connecting buckle 19, so that the two are tightly matched. In actual operation, the precise movement of the piston 17 is controlled by adjusting the pressure handle 5. The pressure handle 5 is connected to the adjusting screw 4. The position of the adjusting screw 4 is changed by rotating the pressure handle 5 to adjust the distance between the slider 14 and the piston 17. This adjustment makes it possible for the slider 14 to drive the piston rod 16 to accurately push the piston 17 when the pressure handle 5 is pressed. Since the sealing ring at the front end of the piston 17 can ensure the sealing of the drug solution during the injection or absorption process, the drug solution can be safely and evenly injected into the patient's body or absorbed into the drug solution bag 13 through the needle, thereby ensuring the accuracy and safety of the drug solution injection.

[0025] During use, the user first aligns the medicine capsule 13 with the recessed groove of the connecting seat 21, and accurately aligns the sealing membrane at the bottom of the medicine capsule 13 with the position of the puncture tube 20. At this time, it is necessary to carefully ensure that the medicine capsule 13 is completely aligned with the entrance of the recessed groove so that it can be correctly pressed into place. When the medicine capsule 13 is pressed into the recessed groove of the connecting seat 21, the puncture tube 20 will automatically puncture the sealing membrane at the bottom of the medicine capsule 13. This process is very critical, because the puncture operation of the puncture tube 20 must not only accurately open the sealing membrane of the medicine capsule 13, but also maintain the integrity of the internal medicine at the same time as puncturing, to avoid leakage of the medicine or contamination caused by the entry of air. Once the sealing membrane of the medicine capsule 13 is punctured, the medicine can smoothly pass through the puncture tube 20 into the connector 11, ensuring that in subsequent operations, the medicine can be accurately injected into the patient's body through the needle or sucked into the medicine capsule 13 through the pipetting function. This design not only ensures the leak-free transmission of the liquid medicine, but also ensures the safety of the liquid medicine and the stability of operation. The entire process is carried out in a closed environment, ensuring that the liquid medicine is sterile and leak-free at every step from the inside of the liquid medicine bag 13 to the needle.

[0026] The top of the piston 17 is specially designed with a connecting slot 18 for connecting to the bottom end of the piston rod 16. A connecting buckle 19 is provided at the bottom end of the piston rod 16. When the user inserts the piston rod 16 into the connecting slot 18 of the piston 17, the connecting buckle 19 will automatically snap into the slot 18. In order to enhance the firmness of the connection, the user needs to rotate the piston rod 16 so that the connecting buckle 19 fits tightly with the slot structure of the connecting slot 18. This rotational locking design not only increases the firmness of the connection, but also ensures that the two will not loosen or detach during operation. In actual operation, when the adjustment handle 5 is pressed, the slider 14 pushes the piston rod 16 forward, and the piston rod 16 accurately transmits this force to the piston 17 through the connecting buckle 19, thereby pushing the piston 17 to slide in the medicine bag 13, ensuring precise control of the medicine. Whether in the process of injecting or absorbing the liquid medicine, the piston 17 can perform precise linear motion as the piston rod 16 pushes it. This design effectively ensures the accuracy of the liquid medicine dosage and the controllability of the operation. In addition, this snap-on connection structure also takes into account the maintenance convenience of the equipment. When replacement or maintenance is required, the user only needs to reversely rotate the piston rod 16 to easily loosen the connecting buckle 19 from the connecting slot 18, thereby realizing the rapid disassembly and replacement of the piston 17. This detachable design is not only convenient for daily cleaning and maintenance, but also provides great flexibility when different models of pistons or liquid medicine bags need to be replaced, further improving the practicality and operational efficiency of the present invention.

[0027] The bottom end of the adjustment handle 5 is connected to the slider 14 via a fixed adjustment screw 4, which moves up and down along the threaded path of the slider 14. When the user rotates the adjustment handle 5, the adjustment screw 4 generates axial displacement through the threaded mechanism, thereby pushing the slider 14 up and down within the slide rail 15. This adjustment only changes the relative distance between the adjustment handle 5 and the piston 17 and has no effect on the initial position of the piston 17. Therefore, regardless of how the adjustment handle 5 is rotated, the piston 17 remains in its predetermined initial position until the pressing action begins.

[0028] In actual operation, the user first presets the required amount of liquid medicine by rotating the adjustment handle 5. This adjustment process will push the slider 14 up and down along the slide rail 15 through the rotation of the adjustment screw 4, and accurately set the distance between the slider 14 and the piston 17. During this process, the display 2 will display the currently set amount of liquid medicine in real time to ensure the accuracy of the operation. When the adjustment is completed, the user presses the adjustment handle 5, and the slider 14 immediately pushes the piston rod 16, and the piston rod 16 further pushes the piston 17 to move in the liquid medicine bag 13, thereby accurately delivering the preset amount of liquid medicine to the specified position through the needle. Since the interactive relationship between the adjustment handle 5 and the adjustment screw 4 only plays a role during the pressing process, the operation of the entire process is simple and highly controllable, ensuring high precision of liquid medicine injection or aspiration.

[0029] After the operation is completed, the user can check the actual dosage of the injection or aspiration through the display 2 to confirm the accuracy of the operation. If the next operation is required, the user can use the reset button on the display 2 to reset the setting to zero and readjust the position of the adjustment handle 5. After resetting, the user can reset the amount of liquid medicine according to the new requirements and perform precise operations again. Through this design, the utility model not only achieves precise control of the liquid medicine, but also simplifies the operation process. The user can quickly and accurately adjust and perform multiple operations, thereby greatly improving the efficiency and reliability of the device in actual application.

[0030] During operation, first ensure that the medicine bag 13 has been correctly installed in the connecting seat 21 on the inner side of the main body 1, and the sealing membrane of the medicine bag 13 has been punctured by the puncture tube 20 to ensure the smooth flow of the medicine channel. The piston 17 is slidably connected to the medicine bag 13, and a connecting slot 18 is provided on the top. The bottom end of the piston rod 16 is firmly connected to the connecting slot 18 of the piston 17 through the connecting buckle 19. The adjusting handle 5 is located at the top of the main body 1 and is threadedly connected to the slider 14 through the adjusting screw 4. When the user rotates the adjusting handle 5, the adjusting screw 4 pushes the slider 14 up and down along the slide rail 15, but does not change the initial position of the piston 17. It only changes the distance between the adjusting handle 5 and the piston 17, so that when the adjusting handle 5 is pressed, precise control of the medicine is achieved. When the adjusting handle 5 is pressed, the piston 17 is pushed, and the medicine is accurately injected into the patient's body through the needle or absorbed into the medicine bag 13. This process can be monitored in real time through the display 2, which will show the current liquid discharge or liquid aspiration volume to ensure precision control.

[0031] The user sets the injection volume by rotating the adjustment handle 5 according to the required injection dose. The adjustment handle 5 is connected to the slider 14 through the adjustment screw 4. When the adjustment handle 5 is rotated, the adjustment screw 4 drives the slider 14 to move up and down, thereby adjusting the distance between the slider 14 and the piston 17. After adjusting to the appropriate dose, the distance between the pressure handle 5 and the slider 14 is fixed, and the adjusted injection dose is determined. The display 2 synchronously displays the set liquid output or liquid aspiration volume to ensure that the user has an accurate grasp of the dose for each operation. On the display 2, the user can intuitively see the currently set dose, further improving the accuracy of the operation. After setting the injection dose, the user aligns the injection needle 9 with the area to be injected. After confirming that the needle has been correctly inserted into the target area, the user presses the adjustment handle 5, and the adjustment handle 5 pushes the slider 14 downward. The slider 14 pushes the piston rod 16 through the connecting buckle 19, thereby pushing the piston 17 to slide in the liquid medicine bag 13. The forward movement of the piston 17 squeezes the liquid medicine out of the liquid medicine bag 13, passes through the puncture tube 20, the connector 11, and finally is injected into the target area through the injection needle 9. Each time the adjustment handle 5 is pressed, the precise amount of liquid medicine is injected according to the set dosage. The entire process can be completed in seconds, ensuring fast and effective drug injection.

[0032] When pipetting is needed, the user can simply replace the pipette needle 10. The process is similar to an injection. The user adjusts the pressure handle 5 to set the desired aspirated volume, then inserts the pipette needle 10 into the liquid medicine container. Pressing the pressure handle 5 causes the piston 17 to retract, creating negative pressure and drawing the liquid from the container into the liquid medicine sac 13. After aspirating, the user can replace the pipette needle 10 with the injection needle 9 and inject the aspirated liquid into the target location according to the preset dosage.

[0033] To ensure the accuracy of the syringe after multiple uses, the syringe must first be calibrated:

[0034] ① Prepare a set of standard liquid samples of known volumes. Typically, you can choose standard solutions with volumes ranging from microliters to milliliters to cover the syringe's entire working range. Next, empty the syringe to ensure there is no residual liquid or air bubbles inside the main body 1. Next, remove the liquid medicine capsule 13 and carefully inspect the puncture tube 20 and connector 11 to ensure they are free of blockage or damage.

[0035] ② Place the standard solution in a clean container. Connect the syringe connector 11 to the injection needle 9 or pipette needle 10, and install the drug capsule 13. Adjust the pressure handle 5 and display 2 to set the target aspiration volume for the syringe. For example, initially set it to 10 μL and gradually increase it to 1 mL or more. After each setting, operate the syringe to aspirate the standard solution and discharge the aspirated solution into a measuring cup for measurement. Record the actual volume aspirated each time. Compare the difference between the target value set on display 2 and the actual measurement in the measuring cup to check for any errors.

[0036] ③ If a deviation is found between the actual measured value and the target set value during the aspiration or discharge process, calibration is required. First, check whether the adjustment handle 5 rotates flexibly, whether the adjustment screw 4 is tight and not worn, and whether the slider 14 can slide smoothly. If any parts are found to be worn or loose, they need to be repaired or replaced accordingly. Adjust the connection between the adjustment screw 4 and the slider 14 by adjusting the pressure handle 5 to ensure that the slider 14 is accurately positioned on the slide rail 15. The connection between the piston rod 16 and the piston 17 should also be checked to ensure that it is tight and not loose.

[0037] ④ During the calibration process, you can use the syringe's reset function to return the adjustment handle 5 and display 2 to zero, ensuring that the display 2 reading is accurate. Then, perform the standard solution aspiration and discharge test again, gradually adjusting until the syringe can accurately control the liquid volume throughout the entire volume range. Through multiple measurements and records, ensure that the error between each set target value and the actual measured value remains within an acceptable range, such as within ±1%. If the expected accuracy requirements are met, the calibration process is complete, and the syringe can continue to be used for precise injection of experimental animals or clinical drugs.

[0038] ⑤ To further verify the effectiveness of the calibration, you can repeat the test several times, repeating the aspiration and dispensing operations at different volume settings and recording the measurement results each time. If the error remains within the allowable range at all set volumes, the syringe is considered calibrated and accuracy has been restored. After the operation is completed, this calibration test should be performed regularly, especially in cases of high-frequency use or harsh operating conditions, to ensure that the syringe maintains high-precision performance over the long term.

[0039] Although the terms "main body 1", "display 2", "side handle 3", "adjusting screw 4", "adjusting pressure handle 5", "mounting sleeve 6", "slide cover 7", "handle 8", "injection needle 9", "pipette needle 10", "connector 11", "mounting port 12", "medicine liquid capsule 13", "slider 14", "slide rail 15", "piston rod 16", "piston 17", "connecting slot 18", "connecting buckle 19", "puncture tube 20", "connecting seat 21" and the like are used more frequently in this document, the possibility of using other terms is not excluded. These terms are only used to facilitate the description of the structure and function of the present invention and do not constitute any limitation to the scope of protection of the present invention. It should be understood that without departing from the spirit of the present invention, those skilled in the art can adopt other equivalent terms, structures or elements according to specific circumstances to achieve the same function. These modifications or replacements should be regarded as equivalent to the contents described herein and fall within the scope of protection required by the present invention.

Claims

1. A modular high-precision syringe, comprising a syringe body (1), two left and right side handles (3) provided on the top of the body, and a connector (11) provided on the bottom of the body, characterized in that: A detachable liquid medicine bag (13) is provided at the lower inner portion of the main body (1), and the liquid medicine bag (13) is used to store liquid medicine; an adjusting pressure handle (5) is provided on the top of the main body (1) for adjusting the liquid discharge amount of the liquid medicine bag, and the adjusting pressure handle (5) is used to control the single liquid discharge amount or the suction amount of the liquid medicine bag (13) by changing the position of the piston (17); and the main body (1) also includes an injection needle (9) and a pipetting needle (10), and both the injection needle (9) and the pipetting needle (10) can be detachably connected to the connector (11) to realize the switching between injection and pipetting functions.

2. The modular high-precision syringe according to claim 1, characterized in that: A piston (17) is provided on the inner side of the top of the liquid medicine bag (13), and the piston (17) is slidably connected to the liquid medicine bag (13). A sealing ring is provided at the front end of the piston (17) to ensure sealing. A blocking membrane is provided at the bottom of the liquid medicine bag (13), and the blocking membrane is punctured by the puncture tube (20) when the liquid medicine bag (13) is installed to ensure that the liquid medicine flows out.

3. The modular high-precision syringe according to claim 2, characterized in that: A connecting seat (21) is provided at the lower inner portion of the main body (1), a recessed groove for connecting the liquid medicine bag (13) is provided at the top of the connecting seat (21), a puncture tube (20) is provided in the recessed groove, and the puncture tube (20) is used to puncture the blocking membrane; the bottom end of the puncture tube (20) is connected to the connector (11).

4. The modular high-precision syringe according to claim 2, characterized in that: The top of the piston (17) is provided with a connecting groove (18); a slide rail (15) is provided on the inner upper part of the main body (1); a slider (14) that can move up and down is slidably connected in the slide rail (15); the bottom end of the slider (14) is fixedly connected to the piston rod (16); a connecting buckle (19) is provided at the bottom end of the piston rod (16); the connecting buckle (19) is inserted into and rotated in the connecting groove (18) to achieve a firm connection between the piston (17) and the piston rod (16); the connection between the piston rod (16) and the piston (17) is a buckle type, which is convenient for disassembly and replacement.

5. The modular high-precision syringe according to claim 4, characterized in that: The bottom end of the regulating pressure handle (5) is fixedly connected to an regulating screw (4), which is connected to the slider (14) through a threaded connection. The regulating pressure handle (5) can be rotated to change the distance between the slider (14) and the piston (17) through the regulating screw (4); when the regulating pressure handle (5) is pressed, the piston (17) is pushed to control the single liquid discharge or intake volume of the liquid medicine.

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