Low-residue injector

Abstract

The utility model provides a low-residue syringe which comprises a syringe barrel, a syringe cover, a syringe needle and a syringe needle. The needle head is connected to the bottom of the injector barrel; the piston is at least partially arranged in the syringe barrel; wherein the piston comprises a piston push rod and a piston nozzle; the piston nozzle is arranged at the bottom of the push rod and makes contact with the inner wall of the syringe barrel. And the piston nozzle is a deformable flexible piston nozzle. The deformable flexible piston nozzle is adopted, the flexible design of the piston nozzle can better adapt to the shape of the inner wall of the syringe barrel, it is ensured that liquid can be effectively pushed out every time pushing is conducted, and the injection efficiency is improved; the deformable flexible piston nozzle and the conical bottom of the syringe barrel act together to ensure that liquid can be completely pushed out, and residual liquid in the syringe is reduced.

Description

Technical Field

[0001] The utility model relates to the field of injection tools, and more specifically, to a low-residue syringe. Background Art

[0002] Injecting drugs is a commonly used treatment method. In currently commonly used syringes, when the piston pushes out the medicine, there is still medicine residue inside the connection between the syringe and the needle, which will affect the treatment. Especially during small-dose injections, since the dose of the medicine itself is very small, the remaining part of the medicine will have a greater impact on the treatment effect. Therefore, it is very necessary to provide a low-residue syringe. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the above technical problems.

[0004] To this end, the purpose of the utility model is to provide a low-residue syringe.

[0005] To achieve the purpose of the utility model, the utility model provides a low-residue syringe, including: a syringe barrel, the bottom of the syringe barrel is conical; a needle, the needle is connected to the bottom of the syringe barrel; a piston, at least part of the piston is arranged inside the syringe barrel; wherein, the piston includes a piston push rod and a piston nozzle; the piston nozzle is arranged at the bottom of the push rod and contacts the inner wall of the syringe barrel; the piston nozzle is a deformable flexible piston nozzle.

[0006] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: the bottom of the syringe barrel is conical, which makes the flow of the medicine at the bottom of the syringe barrel smoother, helps to completely discharge the medicine, and reduces the amount of residual medicine; the needle is connected to the bottom of the syringe barrel to ensure that the medicine can be smoothly injected through the needle; the piston includes a piston push rod and a piston nozzle, the piston push rod is used to push the piston nozzle to move, so that the medicine in the syringe is pushed out; the piston nozzle is arranged at the bottom of the push rod and contacts the inner wall of the syringe barrel to play a sealing role to prevent the medicine from leaking. The piston nozzle is a deformable flexible piston nozzle, which can closely fit the inner wall of the syringe barrel. When it is pushed into the conical area at the bottom of the syringe barrel, the deformable flexible piston nozzle is deformed after being squeezed by the conical inner wall, further pushing out the medicine in the syringe barrel to ensure that the medicine can be pushed out to the greatest extent and reduce the residue.

[0007] Among the above technical features, the syringe barrel further includes: a needle tube connector, the needle tube connector is arranged at the tip position of the conical bottom of the syringe barrel; the needle is connected to the syringe barrel through the needle tube connector.

[0008] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: The needle is firmly connected to the syringe barrel through the needle tube connector, ensuring the sealing performance and stability between the needle and the syringe barrel. At the same time, the deformable flexible piston nozzle deforms after being squeezed by the conical inner wall and partially enters the needle tube connector, further pushing out the medicine remaining in the needle tube connector to reduce the medicine residue.

[0009] In any of the above technical features, a piston nozzle fixing position is provided at the bottom of the piston push rod; the piston nozzle is fixed on the piston push rod through the piston nozzle fixing position.

[0010] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: By providing a piston nozzle fixing position at the bottom of the piston push rod, the deformable flexible piston nozzle can extend into the interior of the piston push rod and be fixed on the piston push rod, with firm fixation, avoiding the piston nozzle coming off during injection and affecting the injection.

[0011] In any of the above technical features, the cross-section of the piston rod is cross-shaped.

[0012] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: The cross-shaped cross-section design increases the rigidity and strength of the piston rod, making it not easily bend or deform when subjected to pushing and pulling forces. Moreover, the cross-shaped structure can maintain the stability of the piston during injection, preventing the piston rod from moving laterally inside the syringe barrel.

[0013] In any of the above technical features, both the needle tube connector and the needle are of universal models.

[0014] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: Both the needle tube connector and the needle are of universal models, improving compatibility: The design of the universal model needle tube connector and needle enables the syringe to be compatible with a variety of standardized needles and connectors. Users can conveniently replace the needles according to their needs without worrying about whether they are suitable for the syringe barrel. At the same time, adopting the universal model design helps to simplify the production process, reduce the manufacturing cost, and promote standardized production.

[0015] After adopting the technical solution of the present utility model, the achievable technical effects are as follows:

[0016] 1. The bottom of the syringe barrel of the low-residue syringe is conical, making the flow of the medicine at the bottom of the syringe barrel smoother, helping to completely discharge the medicine, and reducing the amount of residual medicine.

[0017] 2. Adopting a deformable flexible piston nozzle, the flexible design of the piston nozzle can better adapt to the shape of the inner wall of the syringe barrel, ensuring that each push can effectively push out the liquid, improving the injection efficiency.

[0018] 3. The deformable flexible piston nozzle cooperates with the conical bottom of the syringe barrel to ensure that the liquid can be completely ejected, reducing the residual liquid in the syringe. Description of the Drawings

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 Schematic diagram of the low-residue syringe according to the embodiment of the present invention;

[0021] Figure 2 Schematic diagram of the part of the piston nozzle of the low-residue syringe according to the embodiment of the present invention being squeezed into the needle connector;

[0022] Figure 3 is Figure 1 Schematic cross-sectional view of the A-A plane of the piston in

[0023] Figure 4 Schematic cross-sectional view of the piston push rod of the low-residue syringe according to the embodiment of the present invention;

[0024] Description of the reference numerals in the drawings: 100 - syringe barrel, 110 - piston, 111 - piston push rod, 112 - piston nozzle, 113 - piston nozzle fixing position, 120 - needle connector, 200 - needle. Detailed Embodiments

[0025] In order to more clearly understand the above objects, features and advantages of the present invention, the following will further describe the present invention in detail with reference to the drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments.

[0027] To make the above objects, features and advantages of the present invention more obvious and understandable, the following will Figures 1 to 4 make a detailed description of the specific embodiments of the present invention.

[0028] As Figure 1 and Figure 2As shown in the figure, an embodiment of the present utility model provides a low-residue syringe, comprising: a syringe barrel 100, the bottom of the syringe barrel 100 is conical; a needle 200, the needle 200 is connected to the bottom of the syringe barrel 100; a piston 110, at least part of the piston 110 is arranged inside the syringe barrel 100; wherein, the piston 110 includes a piston push rod 111 and a piston nozzle 112; the piston nozzle 112 is arranged at the bottom of the push rod and contacts the inner wall of the syringe barrel 100; the piston nozzle 112 is a deformable flexible piston nozzle.

[0029] Preferably, the bottom of the syringe barrel 100 is conical, so that the flow of the medicament at the bottom of the syringe barrel 100 is smoother, which helps to completely discharge the medicament and reduce the amount of residual medicament; the needle 200 is connected to the bottom of the syringe barrel 100 to ensure that the medicament can be smoothly pushed into the needle 200 for injection; the piston 110 includes a piston push rod 111 and a piston nozzle 112, and the piston push rod 111 is used to push the piston nozzle 112 to move, so that the medicament in the syringe is pushed out; the piston nozzle 112 is arranged at the bottom of the push rod and contacts the inner wall of the syringe barrel 100, playing a sealing role to prevent the medicament from leaking. The piston nozzle 112 is a deformable flexible piston nozzle, which can closely fit the inner wall of the syringe barrel 100. When it is pushed into the conical area at the bottom of the syringe barrel 100, the deformable flexible piston nozzle is deformed after being squeezed by the conical inner wall, further pushing out the medicament in the syringe barrel 100 to ensure that the medicament can be pushed out to the greatest extent and reduce the residue.

[0030] Preferably, during the injection process, the piston nozzle 112 is pushed by the push rod to push the medicament to the needle 200. The needle 200 is a hollow metal needle 200 so that the medicament can be injected into a human or an animal body; the deformable flexible piston nozzle is preferably made of a material that can be deformed at room temperature, such as flexible epoxy resin.

[0031] In some embodiments of the present utility model, the syringe barrel 100 further includes: a needle tube connector 120, the needle tube connector 120 is arranged at the tip position of the conical bottom of the syringe barrel 100; the needle 200 is connected to the syringe barrel 100 through the needle tube connector 120.

[0032] Preferably, the needle 200 is firmly connected to the syringe barrel 100 through the needle tube connector 120 to ensure the sealing performance and stability between the needle 200 and the syringe barrel 100. At the same time, after the deformable flexible piston nozzle is deformed after being squeezed by the conical inner wall, part of the deformable flexible piston nozzle enters the needle tube connector 120 to further push out the medicament remaining in the needle tube connector 120 to reduce the medicament residue.

[0033] Preferably, the length that the deformable flexible piston nozzle enters the syringe connector 120 is slightly less than the length of the syringe connector 120, that is, there is still a certain gap between the deformable flexible piston nozzle and the needle 200, so as to prevent the deformable flexible piston nozzle from blocking the needle 200.

[0034] As Figure 3 shown, in some embodiments of the present invention, a piston nozzle fixing position 113 is provided at the bottom of the piston push rod 111; the piston nozzle 112 is fixed on the piston push rod 111 through the piston nozzle fixing position 113.

[0035] Preferably, a piston nozzle fixing position 113 is provided at the bottom of the piston push rod 111, and the deformable flexible piston nozzle extends into the piston push rod 111 and is fixed on the piston push rod 111. The depth of the piston nozzle fixing position 113 is preferably two-thirds of the length of the piston nozzle 112, that is, the exposed length of the piston nozzle 112 is one-third of the length of the piston nozzle 112. This makes the piston nozzle 112 firmly fixed and prevents the piston nozzle 112 from coming out during injection, which affects injection.

[0036] As Figure 4 shown, in some embodiments of the present invention, the cross-section of the piston 110 rod is cross-shaped.

[0037] Preferably, the cross-shaped cross-section design increases the rigidity and strength of the piston 110 rod, making it not easy to bend or deform when subjected to pushing and pulling forces. Moreover, due to the cross-shaped cross-section design increasing the stability and rigidity of the piston 110 rod, the piston 110 can maintain a straight-line movement during pushing and pulling, thereby improving the accuracy of injecting liquid, making the piston 110 rod not easy to deform or shift during pushing and pulling, the operation is smoother, reducing the resistance and friction during use, and improving the user experience.

[0038] In some embodiments of the present invention, both the syringe connector 120 and the needle 200 are of general models.

[0039] Preferably, both the syringe connector 120 and the needle 200 are of general models, which improves compatibility: The design of the general model syringe connector 120 and needle 200 enables the syringe to be compatible with a variety of standardized needles 200 and connectors. Users can conveniently replace the needle 200 according to their needs without worrying about whether it is suitable for the syringe barrel 100. At the same time, the use of the general model design helps to simplify the production process, reduce the manufacturing cost, and promote standardized production.

[0040] Preferably, the standardized general models reduce the need for customized production, lower the production and procurement costs, make the prices of the syringe and the needle 200 more affordable, ensure the consistency of their quality and performance, improve the safety and reliability of use, and reduce the use risks caused by incompatibility.

[0041] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, making equivalent substitutions or changes should be covered within the protection scope of the present utility model.

Claims

1. A low-residue syringe, characterized in that: include: A syringe barrel (100), wherein the bottom of the syringe barrel (100) is conical; A needle (200), the needle (200) being connected to the bottom of the syringe barrel (100); A piston (110), wherein the piston (110) is at least partially disposed inside the syringe barrel (100); Wherein, the piston (110) comprises a piston push rod (111) and a piston mouth (112); The piston mouth (112) is arranged at the bottom of the push rod and contacts the inner wall of the syringe barrel (100); The piston nozzle (112) is a deformable and flexible piston nozzle.

2. The low-residue syringe according to claim 1, characterized in that: The syringe barrel (100) further comprises: A needle tube connector (120), the needle tube connector (120) being arranged at the tip of the cone at the bottom of the syringe barrel (100); The needle (200) is connected to the syringe barrel (100) via the needle tube connector (120).

3. The low-residue syringe according to claim 1, characterized in that: A piston nozzle fixing position (113) is provided at the bottom of the piston push rod (111); The piston mouth (112) is fixed to the piston push rod (111) via the piston mouth fixing position (113).

4. The low-residue syringe according to claim 1, characterized in that: The cross section of the piston (110) rod is cross-shaped.

5. The low-residue syringe according to claim 2, characterized in that: The needle tube connector (120) and the needle (200) are both of universal models.

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