Dustproof syringe

Abstract

The utility model discloses a dustproof syringe, include: needle cylinder, piston, piston can slide setting in the inside of needle cylinder, dust cover, dust cover sets up in the inside of needle cylinder, and the first end of dust cover is connected in piston, and the second end of dust cover is connected in the inner wall of needle cylinder. In this technology, by setting dust cover in the inside of needle cylinder, in the process of sucking liquid and injection, the liquid medicine is always placed in the space formed by dust cover, piston and the inner wall of liquid outlet section, and the liquid medicine will not contact with air, which effectively solves the technical problem that the inner wall of needle cylinder is exposed to air when the syringe is repeatedly used, and the liquid medicine in the needle cylinder is easily polluted when sucking medicine again, and facilitates clinical application.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a dustproof syringe. Background Technology

[0002] Syringes are common medical devices, primarily used for pharmaceutical injections and infusions in the medical field. A syringe mainly consists of a barrel, a piston assembly slidably connected to the barrel, and a plunger connected to the piston assembly. Liquid is drawn or injected by pushing and pulling the plunger assembly with the plunger. During aspiration, pulling the plunger moves the piston assembly to draw liquid; during injection, pushing the plunger moves the piston assembly closer to the dispensing end for injection. Because the plunger and barrel are independent components, pushing the plunger exposes the inner wall of the barrel to air, easily causing contamination. When the syringe is reused, repeated pushing and pulling of the syringe leads to the liquid contacting the inner wall of the barrel during each aspiration, easily contaminating the liquid inside the barrel, which can even cause medical accidents in severe cases. Utility Model Content

[0003] In view of the shortcomings of related technologies, the purpose of this utility model is to provide a dustproof syringe, which aims to solve the technical problem that repeated use of syringes can easily cause contamination of the medicine inside the syringe.

[0004] This utility model discloses a dustproof syringe, comprising: a syringe; a piston, the piston being slidably disposed inside the syringe; and a dustproof sleeve, the dustproof sleeve being disposed inside the syringe, the first end of the dustproof sleeve being connected to the piston, and the second end of the dustproof sleeve being connected to the inner wall of the syringe.

[0005] The syringe includes a syringe body and a liquid dispensing section that fit together. The second end of the dust cover is located at the connection between the syringe body and the liquid dispensing section. The end of the liquid dispensing section away from the syringe body has a liquid outlet.

[0006] Specifically, the end of the syringe body near the liquid outlet section is provided with a first snap-fit ​​end, which engages with the liquid outlet section. The first snap-fit ​​end includes: a first snap-fit ​​body, a first snap-fit ​​ring, and a first snap-fit ​​groove. The first snap-fit ​​ring is connected to the outside of the first snap-fit ​​body, and the first snap-fit ​​groove is recessed into the first snap-fit ​​body.

[0007] Specifically, the end of the dispensing section near the syringe body is provided with a second snap-fit ​​end, which engages with the first snap-fit ​​end. The second snap-fit ​​end includes a second snap-fit ​​body, a second snap-fit ​​protrusion, and a second snap-fit ​​step. The second snap-fit ​​protrusion protrudes from the second snap-fit ​​body, and the position of the second snap-fit ​​protrusion corresponds to the position of the first snap-fit ​​groove. The second snap-fit ​​protrusion and the second snap-fit ​​body form a second snap-fit ​​step.

[0008] Preferably, the second snap-fit ​​protrusion is engaged in the first snap-fit ​​groove, the end of the first snap-fit ​​ring away from the syringe body abuts against the second snap-fit ​​step, and the second end of the dust cover is disposed between the second snap-fit ​​protrusion and the first snap-fit ​​groove.

[0009] Preferably, the dust cover is a silicone dust cover.

[0010] Specifically, the piston includes: a support part and a rubber plug layer. The rubber plug layer is wrapped around the outer side of the end of the support part, and the end of the support part away from the rubber plug layer is connected to the push rod. The outer peripheral wall of the support part is provided with a second snap-fit ​​groove, and the side of the rubber plug layer facing the support part is provided with a first snap-fit ​​protrusion. The first snap-fit ​​protrusion is snapped in the second snap-fit ​​groove. The first end of the dust cover is located between the first snap-fit ​​protrusion and the second snap-fit ​​groove.

[0011] Specifically, the support includes an upper cover and a lower cover that are assembled with each other. The upper cover is a conical shell. A tubular groove is provided on the side of the upper cover facing the lower cover, and a plug-in post is provided on the side of the lower cover facing the upper cover. The plug-in post is inserted into the tubular groove to realize the assembly of the upper cover and the lower cover. A second snap-fit ​​groove is provided on the outer peripheral wall of the lower cover so that the first snap-fit ​​protrusion is assembled with the lower cover. The rubber plug layer is placed inside the dust cover.

[0012] Preferably, the inner diameter of the dust cover is smaller than the outer diameter of the rubber plug layer.

[0013] This utility model discloses a dustproof syringe, comprising: a syringe; a piston slidably disposed inside the syringe; and a dust cover disposed inside the syringe, with a first end connected to the piston and a second end connected to the inner wall of the syringe. In this technology, by providing a dust cover inside the syringe, during the aspiration and injection process, the medication is always contained within the space formed by the dust cover, the piston, and the inner wall of the dispensing section, preventing the medication from contacting air and reducing the risk of contamination. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any innovative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of the dustproof syringe disclosed in the embodiments of this utility model; Figure 2 This is a cross-sectional view of the dustproof syringe disclosed in the embodiment of the present utility model in its first state; Figure 3 This is a cross-sectional view of the dustproof syringe disclosed in the embodiment of the present invention in a second state; Figure 4 The embodiments disclosed herein Figure 2 Enlarged view of the structure of section A; Figure 5 The embodiments disclosed herein Figure 2 Enlarged view of the structure of section B; Figure label: 1. Syringe; 11. Syringe body; 111. First locking end; 1111. First locking ring; 1112. First locking groove; 1113. First locking body; 12. Dispensing section; 121. Second locking end; 1211. Second locking protrusion; 1212. Second locking step; 1213. Second locking body; 122. Dispensing port; 2. Piston; 21. Support; 211. Top cover; 2111. Tubular groove; 212. Bottom cover; 2121. Second locking groove; 2122. Insert post; 22. Rubber stopper layer; 221. First locking protrusion; 3. Dust cover; 31. First end; 32. Second end; Detailed Implementation

[0016] 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, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0017] It should be understood that, when used in this specification and the appended claims, the terms “comprising” and “including” indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0018] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0019] It should also be further understood that the terms "and" and "or" as used in this specification and the appended claims refer to any combination of one or more of the associated listed items and all possible combinations, and include such combinations.

[0020] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

[0021] This utility model discloses a dustproof syringe, such as Figure 1-5 As shown, it includes: a syringe 1; a piston 2, which is slidably disposed inside the syringe 1; and a dust cover 3, which is disposed inside the syringe 1. Specifically, the dust cover 3 is tightly fitted to the inner wall of the syringe 1. The first end 31 of the dust cover 3 is connected to the piston 2, and the second end 32 of the dust cover 3 is connected to the inner wall of the syringe 1. When the piston 2 slides along the inner wall of the syringe 1, the first end 31 of the dust cover 3 slides together with the piston 2. When aspirating liquid, the liquid is drawn into the dust cover 3, thus protecting the liquid in the syringe 1 from contamination.

[0022] The syringe 1 includes a syringe body 11 and a liquid outlet section 12 that are interlocked. The second end 32 of the dust cover 3 is located at the connection between the syringe body 11 and the liquid outlet section 12, and the connection is made by ultrasonic welding. The end of the liquid outlet section 12 away from the syringe body 11 is provided with a liquid outlet 122.

[0023] Specifically, the end of the syringe body 11 near the liquid outlet section 12 is provided with a first snap-fit ​​end 111. The first snap-fit ​​end 111 engages with the liquid outlet section 12. The first snap-fit ​​end 111 includes: a first snap-fit ​​body 1113, a first snap-fit ​​ring 1111, and a first snap-fit ​​groove 1112. The first snap-fit ​​ring 1111 is connected to the outside of the first snap-fit ​​body 1113, and the first snap-fit ​​groove 1112 is recessed in the first snap-fit ​​body 1113.

[0024] Specifically, the end of the liquid dispensing section 12 near the syringe body 11 is provided with a second snap-fit ​​end 121. The second snap-fit ​​end 121 engages with the first snap-fit ​​end 111. The second snap-fit ​​end 121 includes a second snap-fit ​​body 1213, a second snap-fit ​​protrusion 1211, and a second snap-fit ​​step 1212. The second snap-fit ​​protrusion 1211 protrudes from the second snap-fit ​​body 1213. The position of the second snap-fit ​​protrusion 1211 corresponds to the position of the first snap-fit ​​groove 1112. The second snap-fit ​​protrusion 1211 and the second snap-fit ​​body 1213 form the second snap-fit ​​step 1212.

[0025] Specifically, the second snap-fit ​​protrusion 1211 is snapped into the first snap-fit ​​groove 1112, and the end of the first snap-fit ​​ring 1111 away from the syringe body 11 abuts against the second snap-fit ​​step 1212. The second end 32 of the dust cover 3 is located between the second snap-fit ​​protrusion 1211 and the first snap-fit ​​groove 1112. During assembly, the second end 32 of the dust cover 3 is first placed in the first snap-fit ​​groove 1112, and then the second snap-fit ​​protrusion 1211 is snapped into the first snap-fit ​​groove 1112 to press the second end 32 of the dust cover 3 tightly. The connection can also be fastened by adhesive to increase the connection strength.

[0026] The dust cover 3 is a silicone dust cover, which is cylindrical. The first end 31 of the dust cover 3 is fixedly connected to the piston 2, and the second end 32 of the dust cover 3 is fixedly connected to the inner wall of the syringe 1. When the piston 2 slides along the inner wall of the syringe, the first end 31 of the dust cover 3 moves with the piston 2, while the second end 32 of the dust cover 3 remains stationary, thus protecting the medicine inside the dust cover 3 from contamination.

[0027] Specifically, the piston 2 includes a support portion 21 and a rubber stopper layer 22. The rubber stopper layer 22 is disposed on the outer side of the end of the support portion 21. Specifically, the support portion 21 is fitted inside the rubber stopper layer 22, which can increase the strength of the rubber stopper layer 22. The outer peripheral wall of the support portion 21 is provided with a second snap-fit ​​groove 2121. The side of the rubber stopper layer 22 facing the support portion 21 is provided with a first snap-fit ​​protrusion 221. The first snap-fit ​​protrusion 221 is snapped in the second snap-fit ​​groove 2121. The first end 31 of the dust cover 3 is disposed between the first snap-fit ​​protrusion 221 and the second snap-fit ​​groove 2121. During assembly, the first end 31 of the dust cover 3 is first placed in the second snap-fit ​​groove 2121, and then the first snap-fit ​​protrusion 221 is snapped into the second snap-fit ​​groove 2121 to press the first end 31 of the dust cover 3 tightly. The connection can be bonded with adhesive to increase the connection strength.

[0028] Specifically, the support part 21 includes an upper cover 211 and a lower cover 212 that are assembled with each other. The upper cover 211 is a conical shell. A tubular groove 2111 is provided on the side of the upper cover 211 facing the lower cover 212. A plug-in post 2122 is provided on the side of the lower cover 212 facing the upper cover 211. During installation, the plug-in post 2122 is inserted into the tubular groove 2111 to realize the assembly of the upper cover 211 and the lower cover 212. A second snap-fit ​​groove 2121 is provided on the outer peripheral wall of the lower cover 212 so that the first snap-fit ​​protrusion 221 is assembled with the lower cover 212. The rubber plug layer 22 is placed inside the dust cover 3.

[0029] The inner diameter of the dust cover 3 is smaller than the outer diameter of the rubber stopper layer 22. The dust cover 3 is made of silicone. By setting the inner diameter of the first end 31 of the dust cover 3 to be smaller than the outer diameter of the rubber stopper layer 22, when the dust cover 3 is fitted onto the outside of the rubber stopper layer 22, the dust cover 3 can fit tightly against the rubber stopper layer 22, preventing the dust cover 3 from slipping when the piston 2 slides along the inner wall of the syringe 1.

[0030] In specific implementation, the first end 31 of the dust cover 3 is connected to the piston 2, and the second end 32 of the dust cover 3 is connected to the inner wall of the syringe 1. During drug aspiration, the piston 2 moves along the inner wall of the syringe 1 away from the dispensing section 12, so that the drug solution is drawn into the syringe 1 from the dispensing port 122. The drug solution is placed in the space formed by the dust cover 3, the piston 2, and the inner wall of the dispensing section 12. Figure 2 As shown; during injection, piston 2 moves along the inner wall of syringe 1 towards the liquid outlet section 12, causing dust cover 3 to also move towards the liquid outlet section 12. The medication flows out from outlet 122. At this time, dust cover 3 is compressed, as... Figure 3 As shown; during this process, the liquid medicine is always placed in the space formed by the inner wall of the dust cover 3, piston 2, and liquid outlet section 12, so the liquid medicine will not come into contact with the air, reducing the risk of contamination of the liquid medicine.

[0031] This utility model discloses a dustproof syringe, comprising: a syringe barrel; a piston slidably disposed inside the syringe barrel; and a dustproof sleeve disposed inside the syringe barrel, with a first end connected to the piston and a second end connected to the inner wall of the syringe barrel. In this technology, by providing a dustproof sleeve on the inner wall of the syringe barrel, the medication is always placed within the space formed by the dustproof sleeve, the piston, and the inner wall of the dispensing section during the aspiration and injection process. The medication will not come into contact with air, reducing the risk of contamination and facilitating clinical application.

[0032] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent modifications or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A dustproof syringe, characterized in that, include: A syringe includes a syringe body and a dispensing section that are interlocked. The second end of a dust cover is located at the connection between the syringe body and the dispensing section. The dispensing section has a dispensing port at the end away from the syringe body. The end of the syringe body near the dispensing section has a first snap-fit ​​end that is interlocked with the dispensing section. The first snap-fit ​​end includes: a first snap-fit ​​body, a first snap-fit ​​ring, and a first snap-fit ​​groove. The first snap-fit ​​ring is connected to the outside of the first snap-fit ​​body, and the first snap-fit ​​groove is recessed into the first snap-fit ​​body. The piston is slidably disposed inside the syringe. The dust cover is located inside the syringe. The first end of the dust cover is connected to the piston, and the second end of the dust cover is connected to the inner wall of the syringe.

2. The dustproof syringe according to claim 1, characterized in that, The end of the liquid dispensing section near the syringe body is provided with a second snap-fit ​​end, which engages with the first snap-fit ​​end. The second snap-fit ​​end includes a second snap-fit ​​body, a second snap-fit ​​protrusion, and a second snap-fit ​​step. The second snap-fit ​​protrusion protrudes from the second snap-fit ​​body, and the position of the second snap-fit ​​protrusion corresponds to the position of the first snap-fit ​​groove. The second snap-fit ​​protrusion and the second snap-fit ​​body form a second snap-fit ​​step.

3. The dustproof syringe according to claim 2, characterized in that, The second snap-fit ​​protrusion is engaged in the first snap-fit ​​groove, the end of the first snap-fit ​​ring away from the syringe body abuts against the second snap-fit ​​step, and the second end of the dust cover is positioned between the second snap-fit ​​protrusion and the first snap-fit ​​groove.

4. A dustproof syringe according to claim 3, characterized in that, The dust cover is a silicone dust cover.

5. A dustproof syringe according to claim 1, characterized in that, Pistons include: The support part and the rubber plug layer are provided on the outer side of the end of the support part, and the end of the support part away from the rubber plug layer is connected to the push rod. The outer peripheral wall of the support part is provided with a second snap-fit ​​groove, and the side of the rubber plug layer facing the support part is provided with a first snap-fit ​​protrusion, which is snapped into the second snap-fit ​​groove. The first end of the dust cover is positioned between the first snap-fit ​​protrusion and the second snap-fit ​​groove.

6. A dustproof syringe according to claim 5, characterized in that, The support includes an upper cover and a lower cover that are assembled with each other. The upper cover is a conical shell. A tubular groove is provided on the side of the upper cover facing the lower cover, and a plug-in post is provided on the side of the lower cover facing the upper cover. The plug-in post is inserted into the tubular groove to realize the assembly of the upper cover and the lower cover. The second snap-fit ​​groove is provided on the outer peripheral wall of the lower cover so that the first snap-fit ​​protrusion can be assembled with the lower cover; The rubber stopper layer is placed inside the dust cover.

7. A dustproof syringe according to claim 6, characterized in that, The inner diameter of the dust cover is smaller than the outer diameter of the rubber plug layer.

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