Double-effect protection type medicine safety configuration syringe

Abstract

The invention relates to a double-effect protection type medicine safety configuration syringe which comprises a barrel, the bottom of the barrel is communicated with a needle seat, a needle body communicated with the barrel is arranged in the needle seat in a penetrating mode, an upper piston is slidably connected in the barrel, and the top of the upper piston is connected with a core rod. The top end of the core rod extends out of the barrel to be connected with a pulling plate, the position, close to the bottom, of the barrel is sleeved with a protection cover, the bottom of the protection cover is connected with a plurality of evenly-distributed stand columns through bolts, and the bottom ends of the stand columns are connected with the same dust cover through bolts. The bottom of an inner cavity of the barrel is connected with a pipe body communicated with the needle body, and a lower piston is arranged at the position, close to the top, outside the pipe body in a sleeving mode. According to the technical scheme, in the using process, the protective cover is arranged, so that the effect of preventing medicine from splashing is achieved when medicine is injected, after medicine injection is completed, the protective cover can protect the needle head and prevent the needle head from being punctured, two purposes are achieved, and the functions are diversified.

Description

Technical Field

[0001] This invention relates to the field of syringe technology, and more specifically to a dual-protection drug safety syringe. Background Technology

[0002] In the medical field, drug preparation and injection are core components of clinical diagnosis and treatment, especially the use of special drugs such as chemotherapy drugs, biological agents, and highly toxic drugs, which places extremely high demands on operational safety. These drugs possess characteristics such as strong corrosivity, cytotoxicity, and sensitization. Leaks or splashes during preparation or injection can not only pollute the environment but also cause occupational exposure for healthcare workers, leading to a series of health risks including skin damage, respiratory irritation, and allergic reactions. In severe cases, this can even induce long-term health problems. Furthermore, after injection, exposed needles are highly susceptible to accidental needlestick injuries to healthcare workers or patients, causing secondary infections or poisoning from drug residues, posing a significant challenge to medical safety.

[0003] While existing drug safety syringes possess basic injection capabilities to some extent, they generally suffer from inadequate protective design and limited functionality. Specifically, most syringes lack specific anti-splash protection structures. During drug extraction and injection, changes in liquid flow rate and needle insertion / removal can easily lead to drug splashing, especially during chemotherapy drug preparation, where even minute amounts of splashing can cause injury to healthcare workers. Secondly, after injection, the needle lacks an effective sealing protection device, typically relying solely on a simple needle cap. This is not only inconvenient but also carries the risk of puncture wounds during cap application, failing to fundamentally address the safety hazards posed by needle exposure. Furthermore, some protective syringes have poorly designed protective structures, resulting in cumbersome operation, reduced injection accuracy, and inadequate protection. For example, the connection between the protective components and the syringe body is unstable, the protection range is limited, and it cannot adapt to the needs of different injection scenarios.

[0004] Meanwhile, existing syringes also have shortcomings in terms of drug preparation accuracy. For example, poor sealing during piston movement can easily lead to drug leakage or air ingress, affecting the accuracy of dosage. Some syringes lack buffering mechanisms, resulting in drastic pressure changes during drug injection, which may not only increase patient pain but also cause excessively high local drug concentrations due to excessively fast flow rates, leading to adverse reactions. In addition, existing syringes have poor versatility, with mostly fixed protective structures that cannot be flexibly adjusted according to different drug characteristics, injection sites, or operating habits, further limiting their application in clinical practice.

[0005] With the continuous improvement of medical standards, the requirements for the safety, accuracy, and convenience of drug preparation and injection are increasing, and existing syringes can no longer meet clinical needs. Therefore, developing a dual-protection drug safety preparation syringe with dual protection functions, convenient operation, high accuracy, and strong versatility is of great practical significance and clinical value for reducing the occupational exposure risk of medical staff, ensuring patient medication safety, and improving the quality of medical services. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of existing drug safety preparation syringes, such as inadequate protection, cumbersome operation, and insufficient precision, and to provide a dual-protection drug safety preparation syringe. This syringe, through optimized structural design, achieves dual functions: protection against drug splashing during injection and needle sealing protection after injection. Simultaneously, it improves the accuracy and ease of operation of drug preparation, reduces the occupational exposure risk for medical personnel, and ensures the safety and reliability of medical procedures.

[0007] This invention provides the following technical solution: a dual-protection drug safety syringe, comprising a barrel, a needle hub connected to the bottom of the barrel, and a needle body communicating with the barrel passing through the needle hub. An upper piston is slidably connected inside the barrel, and a core rod is connected to the top of the upper piston. The top end of the core rod extends out of the barrel and is connected to a pull plate. A protective cover is fitted outside the barrel near the bottom, and several evenly distributed columns are bolted to the bottom of the protective cover. The bottom ends of the columns are bolted to the same dust cover. A tube communicating with the needle body is connected to the bottom of the inner cavity of the barrel, and a lower piston is fitted outside the tube near the top. A docking post connects the top of the lower piston and the bottom of the upper piston.

[0008] As a preferred embodiment of the present invention, a buffer spring is provided on the outer sleeve of the tube body, and the top and bottom ends of the buffer spring are respectively connected to the bottom of the lower piston and the bottom of the inner cavity of the cylinder body.

[0009] As a preferred embodiment of the present invention, a protective ring is fitted around the middle of the outer cylinder, a trigger arm is connected to the left side of the cylinder, and an arc-shaped block is bolted to the outer cylinder near the top.

[0010] As a preferred embodiment of the present invention, a rotating tube is movably connected to the bottom of the protective cover via a bearing. Several evenly distributed opening and closing plates are attached between the bottom of the rotating tube and the top of the dust cover. The bottom of the opening and closing plates is connected to a plug-in post via bolts. The top of the dust cover is provided with an inclined groove that matches the plug-in post.

[0011] As a preferred embodiment of the present invention, a mating block is bolted to the outer side of the opening and closing plate, and a toggle post is bolted to the top of the mating block. A polygonal groove matching the toggle post is provided on the bottom of the rotating tube.

[0012] As a preferred embodiment of the present invention, the outer wall of the rotating tube is connected by bolts to a number of evenly distributed rotating rods, which are made of medical-grade plastic material.

[0013] As a preferred embodiment of the present invention, the front wall of the cylinder is provided with a plurality of evenly distributed pin holes, and the front wall of the protective cover is provided with a pin that matches the pin holes near the top.

[0014] As a preferred embodiment of the present invention, both the upper piston and the lower piston are fitted with sealing rings on their outer walls. The sealing rings are made of medical-grade silicone rubber, and the outer wall of the sealing rings is tightly fitted with the inner wall of the cylinder.

[0015] As a preferred embodiment of the present invention, the protective cover is made of transparent medical-grade polycarbonate material, the inner wall of the protective cover is coated with an anti-fog coating, and the outer side of the protective cover is provided with scale lines.

[0016] As a preferred embodiment of the present invention, the needle body is made of 304 stainless steel, and the surface of the needle body is passivated or nitrided; the top of the pull plate is provided with anti-slip texture, and the shape of the pull plate is elliptical; the docking post is a telescopic rod structure.

[0017] The beneficial effects of this invention are:

[0018] (1) Dual protection design significantly reduces occupational exposure risk: This invention achieves full-process protection during and after injection by setting up a dual protection structure consisting of a protective cover, a dust cover, and an opening and closing plate. During injection, the protective cover surrounds the needle body, which can effectively block drug splashes and prevent medical staff from directly contacting chemotherapy drugs, highly toxic drugs, and other dangerous drugs with their skin and respiratory tract, thereby reducing occupational exposure risk from the source. After injection, the needle body is covered by moving the protective cover, and the opening of the dust cover is closed by using the opening and closing plate to achieve sealed protection of the needle tip. This completely eliminates the risk of puncture that may occur during the traditional syringe needle cap application process, while preventing drug residue leakage and environmental pollution, and ensuring the safety of medical staff, patients, and the environment.

[0019] (2) Excellent sealing performance, ensuring accurate drug preparation: The invention features medical-grade silicone rubber sealing rings on the outer walls of both the upper and lower pistons. These sealing rings fit tightly against the inner wall of the cylinder, forming a double-sealing structure. This effectively prevents air ingress and drug leakage during drug extraction and injection, ensuring accurate dosage. Simultaneously, the reasonable design of the connection structure between the tube, needle, and cylinder ensures smooth drug flow without any dead zones, further enhancing the effectiveness of drug preparation and preventing poor treatment outcomes due to drug waste or dosage deviation.

[0020] (3) Optimized buffer mechanism to improve injection comfort and safety: This invention incorporates a buffer spring outside the tube. During injection, the buffer spring effectively mitigates drastic changes in injection pressure, allowing the medication to be injected into the patient at a uniform and slow flow rate. This not only reduces local pain caused by excessively rapid drug flow but also avoids adverse reactions caused by excessively high local drug concentrations, thus improving the patient's treatment experience. Simultaneously, the buffer spring also reduces the problem of excessive injection force due to improper operation by the operator, further ensuring the safety and stability of the injection process.

[0021] (4) Reasonable structural design and convenient and flexible operation: The protective structure of this invention adopts an adjustable design. Through the cooperation of the pin and multiple pin holes, the height of the protective cover can be flexibly adjusted according to the injection scenario and needs, ensuring that the exposed length of the needle meets the actual operation requirements. The opening and closing of the opening and closing plate is controlled by a rotating rod, which is simple and convenient to operate without the need for additional tools, thus improving work efficiency. In addition, the anti-slip texture of the pull plate, the anti-slip and comfortable design of the protective ring, and the auxiliary force structure of the arc block all conform to the ergonomic principle, reducing the labor intensity of the operator and improving the convenience and stability of operation.

[0022] (5) Safe and reliable materials with strong versatility: All components of this invention are made of materials that meet medical standards. For example, the barrel is made of medical-grade glass or plastic, the needle is made of 304 stainless steel, and the protective cover is made of transparent polycarbonate. The materials have strong chemical stability, are non-toxic and non-irritating, and will not react with drugs, ensuring the purity and safety of the drugs. At the same time, the syringe's structural design can adapt to the needs of different types and concentrations of drugs for preparation and injection. It can be used for chemotherapy drugs, biological agents, and conventional drugs, and can be adapted to different injection sites and operating scenarios, making it highly versatile and widely applicable.

[0023] (6) Anti-fog and antibacterial design to further improve safety: The anti-fog coating on the inner wall of the protective cover can effectively prevent fogging caused by temperature changes, ensuring that operators can clearly observe the injection site and drug flow during injection and avoid operational errors; the silver ion antibacterial coating set in some embodiments can effectively inhibit bacterial growth and reduce the risk of cross-infection, especially suitable for places with high population density and infection risk such as hospitals, further improving safety.

[0024] (7) Stable and durable structure with long service life: The connection of each component of the present invention is reliable, such as the bolt connection between the column and the protective cover and the dust cover, and the bolt connection between the docking column and the upper piston and the lower piston, which ensures the stability of the structure and avoids problems such as loosening or falling off of components during use; at the same time, the materials of each component have good wear resistance and corrosion resistance, such as the passivation or nitriding treatment of the needle body and the stainless steel material of the buffer spring, which extends the service life of the syringe and reduces medical costs.

[0025] In summary, the dual-protection drug safety preparation syringe of the present invention effectively solves the problems of inadequate protection, insufficient accuracy, and cumbersome operation of existing drug safety preparation syringes through its dual protection mechanism, excellent sealing performance, optimized buffer structure, convenient operation design, and safe and reliable material selection. It can significantly reduce the occupational exposure risk of medical staff, ensure patient medication safety, and improve the safety, accuracy, and convenience of medical operations, and has important clinical application value and promotion prospects. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 for Figure 1 Partial side-view perspective of components such as the middle cylinder;

[0028] Figure 3 for Figure 1 Partial 3D view of components such as the upper and middle pistons;

[0029] Figure 4 for Figure 1 Partial bottom-view 3D view of components such as the dust cover;

[0030] Figure 5 for Figure 4 Partial bottom-view 3D view of components such as the hinged panel;

[0031] Figure 6 for Figure 1 A side-view stereoscopic view.

[0032] In the diagram: 1. Cylinder; 2. Protective ring; 3. Arc-shaped block; 4. Core rod; 5. Pull plate; 6. Trigger arm; 7. Pin hole; 8. Pin component; 9. Dust cover; 10. Column; 11. Rotating tube; 12. Rotating rod; 13. Protective cover; 14. Needle body; 15. Upper piston; 16. Connecting post; 17. Buffer spring; 18. Tube body; 19. Lower piston; 20. Opening and closing plate; 21. Inclined groove; 22. Inserting post; 23. Polygonal groove; 24. Actuating post; 25. Connecting block. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0035] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0036] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] like Figures 1-6 As shown, the dual-protection drug safety syringe of the present invention should be used according to the following steps:

[0038] Adjustment of the protective structure: First, rotate the rotating tube 11 counterclockwise by rotating the rotating rod 12. The rotating tube 11 squeezes multiple actuating columns 24 through the polygonal groove 23 at the bottom, so that the actuating columns 24 drive the opening and closing plates 20 to swing synchronously through the docking block 25. During this process, the insertion column 22 at the bottom of the opening and closing plate 20 slides in the inclined groove 21 at the top of the dust cover 9. Under the guidance of the inclined groove 21, several opening and closing plates 20 move away from each other, realizing the opening of the bottom opening of the dust cover 9. Then, loosen the pin 8 on the front wall of the protective cover 13, and move the protective cover 13 and the dust cover 9 upward along the axis of the cylinder 1 until the needle body 14 is completely exposed. At this time, insert the pin 8 into the corresponding pin hole 7 on the front wall of the cylinder 1 to fix the protective cover 13 and complete the preparation work before injection.

[0039] Drug extraction: At this time, the buffer spring 17 inside the cylinder 1 is in a compressed state and is locked by the trigger arm 6 to ensure the stability of the piston structure. The operator holds the cylinder 1 and inserts the needle 14 into the drug container. The operator pulls the core rod 4 upward by pulling the pull plate 5. The core rod 4 drives the upper piston 15 to move upward synchronously. At the same time, the upper piston 15 drives the lower piston 19 to slide upward along the tube 18 through the docking column 16. A negative pressure is formed inside the cylinder 1. Under the action of atmospheric pressure, the drug enters the cylinder 1 through the needle 14 and the tube 18, completing the drug extraction. During this process, the sealing rings on the outer walls of the upper piston 15 and the lower piston 19 are tightly fitted with the inner wall of the cylinder 1, effectively preventing air from entering and drug leakage, and ensuring the accuracy of drug extraction.

[0040] Drug Injection: After the drug is drawn, the operator adjusts the injection site and inserts the needle 14 into the target site. Then, by pressing the pull plate 5 with the thumb, the core rod 4 is pushed downward. The core rod 4 drives the upper piston 15 and the lower piston 19 to move downward simultaneously, squeezing the drug in the cylinder 1. Under pressure, the drug is slowly injected into the patient's body through the tube 18 and the needle 14. During the injection, the buffer spring 17 acts as a buffer to alleviate the drastic changes in injection pressure, which not only reduces the patient's pain but also avoids the problem of excessively high local concentration caused by excessively fast drug flow rate. At the same time, the protective cover 13 surrounds the outside of the needle 14, which can effectively block possible drug splashes during the injection process, prevent medical staff from coming into contact with the drug on their skin and respiratory tract, and reduce the risk of occupational exposure.

[0041] Post-injection protection: After the drug injection is completed, the operator removes the needle 14 from the patient's body, then loosens the pin 8, and moves the protective cover 13 and dust cover 9 downward along the axis of the cylinder 1 until the needle 14 is completely covered. The pin 8 is then inserted into the corresponding pin hole 7 to fix the protective cover 13. Next, the rotating tube 11 is rotated clockwise by the rotating rod 12. The rotating tube 11 squeezes the actuating column 24 through the polygonal groove 23, causing the opening and closing plate 20 to swing. The insertion column 22 slides in the inclined groove 21, so that several opening and closing plates 20 close together, closing the bottom opening of the dust cover 9, achieving closed protection of the needle tip, effectively preventing the risk of needle stick injuries caused by accidental contact with the needle by medical staff or others, and avoiding environmental pollution caused by drug residue leakage.

[0042] Example 1

[0043] This embodiment provides a dual-protection drug safety syringe, including a barrel 1 made of medical-grade glass, which has good chemical stability and transparency, making it easy for operators to observe the drug extraction and injection process. A needle hub is integrally formed at the bottom of the barrel 1, and a needle 14 is inserted into the needle hub via an interference fit. The needle 14 is made of 304 stainless steel with a passivated surface, providing excellent corrosion resistance and sharpness, reducing puncture pain. An upper piston 15 is slidably connected inside the barrel 1, and a core rod 4 is threadedly connected to the top of the upper piston 15. The core rod 4 is made of medical-grade ABS plastic, possessing sufficient strength and toughness. The top of the core rod 4 extends outside the barrel 1 and is bolted to a pull plate 5. The top of the pull plate 5 has anti-slip textures, facilitating grip and application of force by the operator and preventing slippage.

[0044] A protective cover 13 is fitted around the outside of the cylinder 1 near the bottom. The protective cover 13 is made of transparent medical-grade polycarbonate, which not only has good impact resistance but also facilitates the operator's observation of the injection site. The inner wall of the protective cover 13 is coated with an anti-fog coating to prevent fogging caused by temperature changes, which would affect the observation effect. The bottom of the protective cover 13 is connected by bolts to four evenly distributed columns 10. The columns 10 are made of stainless steel to ensure connection stability. The bottom ends of the four columns 10 are connected by bolts to the same dust cover 9. The dust cover 9 is made of the same material as the protective cover 13 to further enhance the protective effect.

[0045] The bottom of the inner cavity of the cylinder 1 is integrally formed with a tube 18 that communicates with the needle body 14. The tube 18 is coaxially arranged with the cylinder 1 to ensure smooth drug flow. A lower piston 19 is sleeved on the outside of the tube 18 near the top. The top of the lower piston 19 and the bottom of the upper piston 15 are connected by bolts to a docking post 16. The docking post 16 is made of medical-grade plastic to ensure that the upper piston 15 and the lower piston 19 move synchronously. A buffer spring 17 is sleeved on the tube 18. The top and bottom of the buffer spring 17 are welded to the bottom of the lower piston 19 and the bottom of the inner cavity of the cylinder 1, respectively. The buffer spring 17 is made of stainless steel and has good elastic recovery performance, which can effectively alleviate pressure fluctuations during injection.

[0046] A protective ring 2 is fitted around the middle of the outer part of the cylinder 1. The protective ring 2 is made of medical-grade silicone material, which increases the comfort of the operator when holding it and also serves as an anti-slip function. A trigger arm 6 is bolted to the left side of the cylinder 1. The trigger arm 6 is made of elastic metal material and can lock and release the buffer spring 17. An arc-shaped block 3 is bolted to the outer part of the cylinder 1 near the top. The arc-shaped block 3 is made of medical-grade plastic, which helps the operator to assist in positioning and applying force during the injection process.

[0047] A rotating tube 11 is movably connected to the bottom of the protective cover 13 via a bearing. The rotating tube 11 is coaxial with the protective cover 13 to ensure smooth rotation. Six evenly distributed opening and closing plates 20 are attached between the bottom of the rotating tube 11 and the top of the dust cover 9. The opening and closing plates 20 are made of medical-grade plastic and have good sealing performance. The bottom of the opening and closing plates 20 is connected to the insertion post 22 by bolts. The top of the dust cover 9 has a slanted groove 21 that matches the insertion post 22. The slanted groove 21 has an inclination angle of 30° to ensure that the opening and closing plates 20 can open and close smoothly.

[0048] The outer side of the opening and closing plate 20 is connected to a connecting block 25 by bolts. The top of the connecting block 25 is connected to a toggle post 24 by bolts. The bottom of the rotating tube 11 is provided with a polygonal groove 23 that matches the toggle post 24. The polygonal groove 23 is a regular hexagonal structure to ensure that the rotating tube 11 can effectively drive the toggle post 24 to move when it rotates. The outer wall of the rotating tube 11 is connected to four evenly distributed rotating rods 12 by bolts. The rotating rods 12 are made of medical-grade plastic to facilitate the operator to rotate the rotating tube 11.

[0049] The front wall of the cylinder 1 has 6 evenly distributed pin holes 7, which are arranged along the axial direction of the cylinder 1. The distance between adjacent pin holes 7 is 1cm, ensuring that the protective cover 13 can be adjusted to different heights. Near the top of the front wall of the protective cover 13, a pin 8 that matches the pin holes 7 is installed by bolts. The pin 8 is made of elastic metal material and has good locking performance.

[0050] Both the upper piston 15 and the lower piston 19 are fitted with sealing rings on their outer walls. The sealing rings are made of medical-grade silicone rubber and have a circular cross-section. The outer wall of the sealing ring is tightly fitted with the inner wall of the cylinder 1 to ensure a sealing effect and prevent drug leakage and air ingress.

[0051] The dual-protection drug safety preparation syringe of this embodiment protects against drug splashing during injection through the protective cover 13, and provides needle sealing protection after injection through the dust cover 9 and the opening and closing plate 20. The dual protection mechanism effectively reduces the occupational exposure risk of medical personnel. At the same time, the buffer spring 17 improves injection comfort and drug injection uniformity, and the sealing ring ensures the accuracy of drug preparation. The overall structure is reasonably designed, easy to operate, and suitable for the preparation and injection of various high-risk drugs.

[0052] Example 2

[0053] The difference between this embodiment and Embodiment 1 is as follows: the inner wall of the protective cover 13 is coated with an antibacterial coating, which is a silver ion coating, which can effectively inhibit bacterial growth and further improve the safety of use; there are 8 opening and closing plates 20, and a sealing gasket is provided between adjacent opening and closing plates 20. The sealing gasket is made of medical silicone material to improve the sealing performance after closing; the inclined angle of the inclined groove 21 is 45°, which makes the opening and closing speed of the opening and closing plates 20 faster; there are 8 pin holes 7, and the distance between adjacent pin holes 7 is 0.8cm, which can more accurately adjust the height of the protective cover 13; the stiffness coefficient of the buffer spring 17 is 5N / mm, which further optimizes the buffering effect.

[0054] The rest of the structure is the same as in Example 1. The syringe in this example has better sealing, antibacterial properties and adjustment precision, and can adapt to more complex clinical scenarios.

[0055] Example 3

[0056] The difference between this embodiment and Embodiment 1 is as follows: the cylinder 1 is made of medical-grade plastic material, which is lighter and easier to carry and operate; the surface of the needle 14 is nitrided to further improve its hardness and corrosion resistance; the outer side of the protective cover 13 is provided with scale lines to facilitate the operator to observe the movement distance of the protective cover 13; the pull plate 5 is elliptical in shape, which is more ergonomic and improves the comfort of operation; the docking post 16 is a telescopic rod structure, which can adjust the length according to actual needs and increase the versatility of the syringe.

[0057] The rest of the structure is the same as in Embodiment 1. The syringe in this embodiment has the advantages of being lighter, more comfortable to operate, and more versatile, making it suitable for different operating habits and scenarios.

[0058] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0059] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims and their equivalents, this invention also intends to include these modifications and variations. The above descriptions are merely preferred embodiments of the present invention and are not intended to limit the invention. Those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention; therefore, the scope of protection of this invention is determined by the claims.

Claims

1. A dual-protection drug safety syringe, characterized in that, The application relates to a medicine injection device, which comprises a cylinder (1), a needle seat connected to the bottom of the cylinder (1), a needle body (14) arranged in the needle seat and communicated with the cylinder (1), an upper piston (15) slidably connected in the cylinder (1), a core rod (4) connected to the top of the upper piston (15), a pulling plate (5) connected to the top end of the core rod (4) and extending out of the cylinder (1), a protective cover (13) sleeved on the cylinder (1) near the bottom, a plurality of vertical columns (10) evenly distributed and connected to the bottom of the protective cover (13) through bolts, a dust cover (9) connected to the bottom ends of the vertical columns (10) through bolts, a pipe body (18) connected to the needle body (14) and arranged in the inner cavity of the cylinder (1), a lower piston (19) sleeved on the pipe body (18) near the top, and a butt joint column (16) connected between the top of the lower piston (19) and the bottom of the upper piston (15).

2. A dual shielded medicament safety configuration syringe according to claim 1, wherein, A buffer spring (17) is sleeved on the pipe body (18), and the top end and the bottom end of the buffer spring (17) are connected to the bottom of the lower piston (19) and the inner cavity bottom of the cylinder (1) respectively.

3. A dual shielded safety configuration medicine injector according to claim 1, wherein, A protective ring (2) is sleeved on the middle of the cylinder (1), a trigger arm (6) is connected to the left side of the cylinder (1), and an arc-shaped block (3) is connected to the top of the cylinder (1) through bolts.

4. A dual shielded safety configuration medicine injector according to claim 1, wherein, A rotating pipe (11) is movably connected to the bottom of the protective cover (13) through a bearing, a plurality of evenly distributed opening and closing plates (20) are arranged between the bottom of the rotating pipe (11) and the top of the dust cover (9), the bottom of the opening and closing plate (20) is connected to a plug-in column (22) through bolts, and the top of the dust cover (9) is provided with an inclined groove (21) matched with the plug-in column (22).

5. A dual shielded safety configuration syringe of claim 4, wherein, The outer side of the opening and closing plate (20) is connected to a butt joint block (25) through bolts, the top of the butt joint block (25) is connected to a pushing column (24) through bolts, and the bottom of the rotating pipe (11) is provided with a polygonal groove (23) matched with the pushing column (24).

6. A dual shielded safety configuration syringe of claim 5, wherein, The outer wall of the rotating pipe (11) is connected to a plurality of evenly distributed rotating rods (12) through bolts, and the rotating rods (12) are made of medical-grade plastic material.

7. A dual shielded safety configuration syringe of claim 1, wherein, A plurality of evenly distributed bolt holes (7) are formed in the front wall of the cylinder (1), and a bolt piece (8) matched with the bolt holes (7) is arranged on the top of the front wall of the protective cover (13).

8. A dual shielded safety configuration syringe of claim 1, wherein, The outer walls of the upper piston (15) and the lower piston (19) are sleeved with sealing rings made of medical-grade silicone rubber, and the outer walls of the sealing rings are tightly attached to the inner wall of the cylinder (1).

9. A dual shielded safety configuration syringe of claim 1, wherein, The protective cover (13) is made of transparent medical polycarbonate material, the inner wall of the protective cover (13) is coated with an anti-fog coating, and the outer side of the protective cover (13) is provided with a scale line.

10. A dual shielded medicament safety configuration syringe according to claim 1, wherein, The needle body (14) is made of 304 stainless steel, and the surface of the needle body (14) is treated by passivation or nitriding; the top of the pulling plate (5) is provided with an anti-skid pattern, and the pulling plate (5) is in an elliptical shape; and the butt joint column (16) is in a telescopic rod structure.

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