A dose adjustment mechanism for rabies vaccine injection

Abstract

The utility model relates to the field of syringe discloses a rabies vaccine injection dose adjusting mechanism, including syringe, the inside slide coupling of syringe has injection piston, the inside of syringe is provided with defoaming mechanism, defoaming mechanism includes defoaming filter screen, defoaming filter screen is detachably connected in the inner wall of syringe, the inner wall of syringe is fixedly connected with spoiler, the outer wall of injection piston one side close to needle is fixedly connected with piston improvement subassembly, the inner wall of syringe is fixedly connected with mounting ring, the inner ring of mounting ring is fixedly connected with bubble aggregation cone. In the utility model, the spoiler changes vaccine flow direction, makes fluid to produce turbulence, promotes small bubbles to collide with each other, polymerization, forms the larger bubble that is easy to handle, strengthens the effect that bubble eliminates, bubble filter screen effectively intercepts larger bubble with fine mesh, prevents its from entering subsequent flow, reduces the quantity of bubble.

Description

Technical Field

[0001] This utility model relates to the field of syringes, and more particularly to a dosage adjustment mechanism for rabies vaccine injection. Background Technology

[0002] Accurate dosage control and effective elimination of air bubbles in the vaccine are crucial for ensuring safety and effectiveness during rabies vaccination.

[0003] When medical personnel administer rabies vaccines using standard injection devices, they primarily adjust the vaccine dosage through simple manual operation. Specifically, they first draw the required dose of vaccine, then push or pull the piston to control the amount inhaled, ultimately completing the injection. During this process, air bubbles are often handled simply by lightly flicking the syringe to allow them to rise to the top and expel a small amount of vaccine.

[0004] However, the presence of tiny air bubbles occupies a certain volume, causing a deviation between the actual injected vaccine dose and the expected dose. Existing manual air venting methods cannot ensure that all air bubbles are effectively removed, especially tiny ones, which can easily remain in the vaccine, leading to inaccurate injection dosage and affecting the vaccine's immunizing effect. Therefore, a dosage adjustment mechanism for rabies vaccine injection is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a dosage adjustment mechanism for rabies vaccine injection, which aims to improve the problem of air bubbles in vaccine injection in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a dosage adjustment mechanism for rabies vaccine injection, comprising a syringe, wherein an injection piston is slidably connected inside the syringe, and an antifoaming mechanism is provided inside the syringe;

[0007] The defoaming mechanism includes a defoaming filter screen, which is detachably connected to the inner wall of the syringe. A baffle plate is fixedly connected to the inner wall of the syringe. A piston improvement assembly is fixedly connected to the outer wall of the injection piston near the needle. An installation ring is fixedly connected to the inner wall of the syringe. A bubble gathering cone is fixedly connected to the inner ring of the installation ring.

[0008] As a further description of the above technical solution: the improved piston assembly includes a push plate, which is fixedly connected to the outer wall of the injection piston, and the edge of the push plate is attached to and slidably connected to the inner wall of the syringe.

[0009] As a further description of the above technical solution: the surface of the push plate is provided with several small holes.

[0010] As a further description of the above technical solution: a one-way valve is fixedly connected to the inner wall of the syringe, the one-way valve is fixedly connected to an exhaust channel, and a collection box is detachably connected to the end of the exhaust channel away from the one-way valve. The collection box is detachably connected to an mounting ring by bolts.

[0011] As a further description of the above technical solution: the defoaming filter and the baffle plate are both detachably connected to the inner wall of the mounting ring by bolts.

[0012] As a further description of the above technical solution: a through groove is provided on the outer wall of the mounting ring.

[0013] As a further description of the above technical solution: a motor is fixedly connected to the bottom of the collection box, an elliptical wheel is fixedly connected to the output end of the motor, an installation plate is fixedly connected to the outer wall of the syringe, a connecting rod is fixedly connected to the inner wall of the installation plate, and a movable plate is slidably connected to the outer wall of the connecting rod.

[0014] As a further description of the above technical solution: a spring is fixedly connected to the inner wall of the mounting plate, the spring is fixedly connected to the movable plate, and an impact rod is fixedly connected to the outer wall of the movable plate.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, the baffle changes the direction of vaccine flow, causing turbulence in the fluid, which promotes the collision and aggregation of microbubbles to form larger bubbles that are easier to handle, thus enhancing the bubble elimination effect. The bubble filter effectively intercepts larger bubbles with its fine mesh, preventing them from entering subsequent processes and reducing the number of bubbles. The push plate of the improved piston assembly not only blocks potentially remaining larger bubbles from entering the needle, but the shearing force generated by the small holes on its surface when the vaccine passes through can further break up microbubbles or promote their aggregation, achieving the functions of secondary filtration and bubble compression.

[0017] 2. In this invention, the unique structure of the bubble-gathering cone guides bubbles to converge towards the tip, facilitating their capture and discharge through the exhaust channel. This significantly improves bubble elimination efficiency and effectively reduces the number of residual bubbles in the vaccine. These components work together to eliminate bubbles in the vaccine from all angles, preventing bubbles from affecting the injection dosage, ensuring the accuracy of rabies vaccine dosage, and contributing to improved vaccine efficacy.

[0018] 3. In this utility model, after the motor is started, the elliptical wheel drives the movable plate to reciprocate, and the impact rod periodically impacts the outer wall of the syringe to help eliminate air bubbles. The entire operation process does not require complicated steps, which reduces the difficulty of work for medical staff and improves work efficiency. Attached Figure Description

[0019] Figure 1 This is a front view of a rabies vaccine injection dosage adjustment mechanism proposed in this utility model;

[0020] Figure 2 This is a cross-sectional view of a dosage adjustment mechanism for rabies vaccine injection proposed in this utility model;

[0021] Figure 3 This is a schematic diagram of the one-way valve of a rabies vaccine dosage adjustment mechanism proposed in this utility model;

[0022] Figure 4 This is a schematic diagram of the impact rod of a dosage adjustment mechanism for rabies vaccine injection proposed in this utility model.

[0023] Legend:

[0024] 1. Syringe; 2. Injection piston; 3. Defoaming filter; 4. Baffle plate; 5. Piston improvement assembly; 6. One-way valve; 7. Exhaust channel; 8. Collection box; 9. Mounting ring; 10. Bubble gathering cone; 11. Motor; 12. Mounting plate; 13. Elliptical wheel; 14. Connecting rod; 15. Spring; 16. Movable plate; 17. Impact rod. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Reference Figure 1 - Figure 3This utility model provides an embodiment of a rabies vaccine dosage adjustment mechanism, comprising a syringe 1, an injection piston 2 slidably connected inside the syringe 1, and an antifoaming mechanism inside the syringe 1. The antifoaming mechanism includes an antifoaming filter 3, which is detachably connected to the inner wall of the syringe 1. The filter 3 serves to initially filter air bubbles. Its fine mesh structure intercepts larger air bubbles in the vaccine, preventing them from flowing into subsequent stages. During vaccine extraction, when the vaccine flows through the antifoaming filter 3, larger air bubbles are blocked on one side of the filter, while the vaccine can smoothly pass through the mesh and enter the syringe 1. The inner wall of the syringe 1... A baffle plate 4 is fixedly connected to the upper part of the syringe 1 to change the flow direction of the vaccine and create turbulence inside the syringe 1. When the vaccine passes through the baffle plate 4, the originally relatively stable fluid will generate turbulence. This turbulence can cause small bubbles to collide and aggregate with each other. The tiny bubbles that were originally dispersed in the vaccine will gradually gather together under the action of turbulence to form larger bubbles, which are easier to process and remove in the future, thereby further improving the bubble elimination effect and enhancing the performance of the entire defoaming mechanism. A piston improvement component 5 is fixedly connected to the outer wall of the injection piston 2 near the needle. It moves with the movement of the injection piston 2 to perform secondary filtration and squeeze the bubbles in the vaccine. When the injection piston 2 is pushed to inject the vaccine, the piston improvement component 5 can block larger air bubbles that may have passed through the previous defoaming stage, preventing them from entering the needle. An installation ring 9 is fixedly connected to the inner wall of the syringe 1, which firmly fixes the defoaming filter 3, baffle 4 and other components to a specific position on the inner wall of the syringe 1. A bubble gathering cone 10 is fixedly connected to the inner ring of the installation ring 9. The special structure of the bubble gathering cone 10 can change the path of the bubbles, making the bubbles more concentrated and converge towards its tip. The bubbles gathered at the tip are more easily captured and discharged by the subsequent exhaust channel 7, which greatly improves the efficiency of bubble elimination and effectively reduces the number of residual bubbles in the vaccine.

[0027] Reference Figure 2 - Figure 4The piston improvement assembly 5 includes a push plate, which is fixedly connected to the outer wall of the injection piston 2. The edge of the push plate is in contact with and slidably connected to the inner wall of the syringe 1, ensuring that the vaccine will not leak from the gap between the push plate and the inner wall of the syringe 1 during the injection process. The surface of the push plate has several small holes. When the vaccine is pushed, it can pass through the small holes and pass through the push plate, allowing the push plate to filter the vaccine without affecting its normal flow. When the vaccine passes through the small holes, a certain shearing force is generated. This shearing force helps to break up the tiny air bubbles in the vaccine or promotes the aggregation of the tiny air bubbles, thereby better eliminating air bubbles and improving the quality and injection safety of the vaccine. The inner wall of the syringe 1 is fixed with... A one-way valve 6 is connected to prevent gas backflow. The one-way valve 6 is fixedly connected to an exhaust channel 7. The end of the exhaust channel 7 away from the one-way valve 6 is detachably connected to a collection box 8. When bubbles enter the exhaust channel 7 through the one-way valve 6, they will flow along the channel away from the inside of the syringe 1 and eventually be discharged into the collection box 8. This ensures that the bubbles are discharged smoothly and prevents the vaccine from leaking during the exhaust process, thus ensuring the smooth progress of the entire defoaming process. The collection box 8 is detachably connected to an installation ring 9 by bolts. The defoaming filter 3 and the baffle 4 are both detachably connected to the inner wall of the installation ring 9 by bolts. The bolt connection method makes the installation and removal of the defoaming filter 3 and the baffle 4 very convenient.

[0028] Reference Figure 2 - Figure 4 A through groove is provided on the outer wall of the mounting ring 9 to facilitate vaccine flow. A motor 11 is fixedly connected to the bottom of the collection box 8, and an elliptical wheel 13 is fixedly connected to the output end of the motor 11. A mounting plate 12 is fixedly connected to the outer wall of the syringe 1, providing a base for the installation and fixation of other components. A connecting rod 14 is fixedly connected to the inner wall of the mounting plate 12, and a movable plate 16 is slidably connected to the outer wall of the connecting rod 14. The connecting rod 14 limits and supports the movable plate 16. A spring 15 is fixedly connected to the inner wall of the mounting plate 12. When the elliptical wheel 13 pushes the movable plate 16 forward, the spring 15 is compressed, storing... The spring 15 stores elastic potential energy; when the elliptical wheel 13 disengages from the movable plate 16, the spring 15 releases elastic potential energy, pushing the movable plate 16 to return to its original position. The spring 15 is fixedly connected to the movable plate 16, and an impact rod 17 is fixedly connected to the outer wall of the movable plate 16. The elliptical wheel 13 moves in a circular motion under the drive of the motor 11. During the rotation, it will generate different gaps when it contacts the movable plate 16, thereby pushing the movable plate 16 to reciprocate. This reciprocating motion can be transmitted to the impact rod 17, so that the impact rod 17 produces a periodic impact on the syringe 1, which helps the bubbles in the vaccine to gather and be discharged more quickly, further improving the defoaming effect.

[0029] Working principle: When using this rabies vaccine injection dosage adjustment mechanism, medical personnel first insert the syringe 1 into the vaccine vial according to the required vaccine dosage and pull the injection piston 2 backward. At this time, a negative pressure is formed inside the syringe 1. The vaccine enters the syringe 1 under the action of external atmospheric pressure. During the entry process, the baffle 4 first changes the flow direction of the vaccine, causing the originally stable fluid to become turbulent. Under the action of turbulence, the tiny bubbles dispersed in the vaccine collide and aggregate with each other, forming larger bubbles, which are easier to process and remove later, thus initially improving the bubble elimination effect. Then, it passes through the defoaming filter 3, which intercepts larger bubbles in the vaccine through its fine mesh structure, blocking the larger bubbles on one side of the filter. The vaccine then smoothly passes through the mesh and enters the syringe 1, completing further bubble filtration.

[0030] When further assistance is needed to eliminate air bubbles, the motor 11 fixedly connected to the bottom of the collection box 8 is activated. The motor 11 drives the elliptical wheel 13 at the output end to rotate. During the rotation, the elliptical wheel 13 creates different gaps when it contacts the movable plate 16 due to its elliptical shape, thereby pushing the movable plate 16 to reciprocate on the connecting rod 14. When the elliptical wheel 13 pushes the movable plate 16 forward, the spring 15 is compressed and stores elastic potential energy. When the elliptical wheel 13 disengages from the movable plate 16, the spring 15 releases its elastic potential energy, pushing the movable plate 16 to return to its original position. The impact rod 17 fixedly connected to the outer wall of the movable plate 16 periodically impacts the outer wall of the syringe 1 with the reciprocating motion of the movable plate 16. This impact causes the vaccine inside the syringe 1 to vibrate slightly, which helps to break up the difficult-to-eliminate air bubble clusters, making it easier for the air bubbles to rise and gather, further improving the defoaming effect. After drawing the appropriate dose of vaccine and confirming that there are no air bubbles, the medical staff aligns the needle of the syringe 1 with the injection site, pushes the injection piston 2 forward, and accurately injects the vaccine into the patient's body, completing the rabies vaccine injection process.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dose adjustment mechanism for rabies vaccine injections, comprising a syringe (1), characterized in that: The syringe (1) is slidably connected to an injection piston (2), and the syringe (1) is provided with an antifoaming mechanism. The defoaming mechanism includes a defoaming filter (3), which is detachably connected to the inner wall of the syringe (1). A baffle (4) is fixedly connected to the inner wall of the syringe (1). A piston improvement assembly (5) is fixedly connected to the outer wall of the injection piston (2) near the needle. An installation ring (9) is fixedly connected to the inner wall of the syringe (1). A bubble gathering cone (10) is fixedly connected to the inner ring of the installation ring (9).

2. A rabies vaccine dose adjustment mechanism according to claim 1, characterized in that: The piston improvement assembly (5) includes a push plate, which is fixedly connected to the outer wall of the injection piston (2), and the edge of the push plate is attached to and slidably connected to the inner wall of the syringe (1).

3. A rabies vaccine dose adjustment mechanism according to claim 2, characterized in that: The surface of the push plate has several small holes.

4. The rabies vaccine dose adjustment mechanism of claim 2, wherein: A one-way valve (6) is fixedly connected to the inner wall of the syringe (1). An exhaust channel (7) is fixedly connected to the one-way valve (6). A collection box (8) is detachably connected to the end of the exhaust channel (7) away from the one-way valve (6). An installation ring (9) is detachably connected to the collection box (8) by bolts.

5. The rabies vaccine dose adjustment mechanism of claim 1, wherein: The defoaming filter (3) and the baffle plate (4) are both detachably connected to the inner wall of the mounting ring (9) by bolts.

6. The rabies vaccine dose adjustment mechanism of claim 1, wherein: A through groove is provided on the outer wall of the mounting ring (9).

7. A rabies vaccine dose adjustment mechanism according to claim 4, characterized in that: A motor (11) is fixedly connected to the bottom of the collection box (8), and an elliptical wheel (13) is fixedly connected to the output end of the motor (11). An installation plate (12) is fixedly connected to the outer wall of the syringe (1), and a connecting rod (14) is fixedly connected to the inner wall of the installation plate (12). A movable plate (16) is slidably connected to the outer wall of the connecting rod (14).

8. A rabies vaccine dose adjustment mechanism according to claim 7, characterized in that: A spring (15) is fixedly connected to the inner wall of the mounting plate (12), and the spring (15) is fixedly connected to the movable plate (16). An impact rod (17) is fixedly connected to the outer wall of the movable plate (16).

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