A disposable syringe with a filter structure

Abstract

The utility model discloses a one -time syringe with filter structure, including needle cylinder, the needle cylinder inside has the piston, the needle cylinder front end is provided with liquid inlet and liquid outlet respectively, the needle cylinder front end outside has the liquid guide chamber of covering in liquid inlet, the liquid guide chamber is located the opposite end of liquid inlet and has the liquid guide mouth, the liquid guide chamber outside has the needle seat of being linked with liquid guide mouth, the liquid guide chamber inside is provided with the first check valve of being dredged to liquid inlet direction, the needle cylinder front end outside still has the transfer chamber of covering in liquid outlet, the transfer chamber is linked with needle seat each other through the pipeline, the liquid inlet inside is provided with filter membrane, when the suction force is produced to the liquid guide mouth, the liquid that enters from needle seat only flows into the liquid guide mouth direction with negative pressure, when the liquid guide mouth is closed and the liquid outlet is opened, then the positive pressure is produced in transfer chamber, make the liquid in syringe interior can be input to needle seat and needle head through infusion connecting pipe, simple structure, cooperation is ingenious.

Description

Technical Field

[0001] This utility model relates to the field of syringe technology, specifically to a disposable syringe with a filter structure. Background Technology

[0002] A syringe is a common medical device used to draw in or inject gas or liquid using a needle. The process is called injection. A syringe consists of a syringe barrel with a small hole at the tip and a matching plunger. It is used to inject small amounts of liquid or gas into or from areas inaccessible by other methods, expelling the liquid or gas as the plunger is withdrawn.

[0003] In clinical practice, traditional syringes are typically single-use for safety reasons. However, in actual use, some liquid containers such as vials drawn by syringes may contain sediment residue, unremoved foreign objects (such as bottle stopper debris), or certain medications may produce insoluble microparticles under certain conditions. While these injectable medications with residues may not cause adverse symptoms in patients when used occasionally, they can cause unpredictable long-term health hazards, especially for patients requiring long-term injection therapy, after absorbing a large amount of insoluble microparticles. This reduces both the cleanliness of the medication and the effectiveness of clinical treatment. Utility Model Content

[0004] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0005] Therefore, the purpose of this utility model is to provide a disposable syringe with a filtering structure to solve the problem mentioned in the background art that traditional syringes do not filter out impurities such as precipitate residues, uncleaned foreign matter, and insoluble particles.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a disposable syringe with a filtering structure, comprising a syringe barrel, a piston on the inner side of the syringe barrel, an inlet and an outlet respectively provided at the front end of the syringe barrel, a liquid guiding chamber covering the inlet on the outer side of the front end of the syringe barrel, a liquid guiding port at the opposite end of the liquid guiding chamber, a needle seat communicating with the liquid guiding port on the outer side of the liquid guiding chamber, a first check valve communicating with the inlet inside the liquid guiding chamber, a transfer chamber covering the outlet on the outer side of the front end of the syringe barrel, the transfer chamber communicating with the needle seat through a pipeline, a filter membrane provided on the inner side of the outlet, and a second check valve communicating with the needle seat inside the transfer chamber;

[0007] Wherein, the sealing surface of the first check valve corresponds to the liquid inlet, and the sealing surface of the second check valve corresponds to the liquid outlet.

[0008] As a preferred embodiment of the disposable syringe with a filtering structure described in this utility model, one end of the piston is also connected to a core rod, and the core rod extends to the outside of the syringe barrel from the opposite end of the piston.

[0009] In a preferred embodiment of the disposable syringe with a filtering structure described in this utility model, a needle is also fitted onto the outer front end of the needle hub.

[0010] In a preferred embodiment of the disposable syringe with a filtering structure described in this utility model, the first check valve and the second check valve have the same structure.

[0011] The first check valve includes a valve cover, a torsion spring hinge located at the connection between the valve cover and the inner side of the liquid guide chamber, and a sealing ring located on the periphery of the valve cover sealing surface.

[0012] As a preferred embodiment of the disposable syringe with a filter structure described in this utility model, the transfer chamber is further provided with an infusion tube connected to the side of the needle hub, and the infusion tube is located close to the root of the needle hub.

[0013] As a preferred embodiment of the disposable syringe with a filter structure described in this utility model, a support grid for fixing the filter membrane is further provided on the inner side of the liquid outlet.

[0014] The support grid plate includes a fixing ring fixed to the inside of the liquid outlet and a mesh grid disposed inside the fixing ring and in contact with the filter membrane.

[0015] Compared with the prior art, the beneficial effects of this utility model are: this disposable syringe with a filtration structure, through the cooperation of the syringe barrel, inlet, outlet, liquid guide chamber, check valve, transfer chamber and filter membrane, can effectively filter impurities such as insoluble particles in the liquid medicine during extraction and injection. It has the characteristics of simple structure, reasonable design and safety and reliability. While ensuring the cleanliness of the liquid medicine, it also improves the clinical treatment effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall external structure of this utility model;

[0017] Figure 2 This is a side view of the internal structure of the present invention.

[0018] Figure 3 This utility model Figure 2Schematic diagram of a partial structural detail in the middle section;

[0019] Figure 4 This is a schematic diagram of the check valve structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the supporting grid structure of this utility model.

[0021] In the diagram: 100, syringe; 1001, inlet; 1002, outlet; 200, piston; 210, core rod; 300, guide chamber; 3001, guide port; 400, needle seat; 500, first check valve; 510, valve cover; 520, torsion spring hinge; 530, sealing ring; 600, needle; 700, transfer chamber; 710, infusion tubing; 800, filter membrane; 810, support grid; 8101, fixing ring; 8102, mesh grid; 900, second check valve. Detailed Implementation

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0023] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0025] Figures 1-5 The diagram shown is a complete structural schematic of a disposable syringe with a filtering structure according to this utility model. Please refer to [link / reference]. Figures 1-5This embodiment of a disposable syringe with a filtering structure includes a syringe 100, a piston 200 inside the syringe 100, an inlet 1001 and an outlet 1002 at the front end of the syringe 100, a liquid guiding chamber 300 covering the inlet 1001 on the outer side of the front end of the syringe 100, a liquid guiding port 3001 at the opposite end of the liquid guiding chamber 300, a needle seat 400 communicating with the liquid guiding port 3001 on the outer side of the liquid guiding chamber 300, and a liquid guiding chamber 300 containing a needle seat 400 inside the liquid guiding chamber 300. A first check valve 500 is provided to unclog the inlet 1001. The outer side of the front end of the syringe 100 is also provided with a transfer chamber 700 covering the outlet 1002. The transfer chamber 700 is connected to the needle seat 400 through a pipeline. A filter membrane 800 is provided inside the outlet 1002. A second check valve 900 is provided inside the transfer chamber 700 to unclog the needle seat 400. The sealing surface of the first check valve 500 corresponds to the liquid guide port 3001, and the sealing surface of the second check valve 900 corresponds to the outlet 1002.

[0026] In this embodiment, one end of the piston 200 is also connected to a core rod 210, and the core rod 210 extends to the outside of the syringe 100 from the opposite end of the piston 200. Here, the piston 200 matches the inner diameter of the syringe 100. By pulling the core rod 210 and driving the piston 200 forward and backward, the purpose of drug suction and squeezing output is achieved. This is a common technical means in this field and will not be described in detail. Furthermore, a needle 600 is also fitted onto the outer front end of the needle holder 400. It should be noted that the needle holder 400 here is a standard connector for a syringe. When connecting, it is only necessary to press the end of the needle 600 against the outside of the needle holder 400.

[0027] The first check valve 500 and the second check valve 900 have the same structure. The first check valve 500 includes a valve cover 510, a torsion spring hinge 520 disposed at the connection between the valve cover 510 and the inner side of the liquid guiding chamber 300, and a sealing ring 530 disposed on the periphery of the sealing surface of the valve cover 510. It can be understood that when the first check valve 500 or the second check valve 900 is freed from external force restraint, the valve cover 510 will be automatically closed under the action of the torsion spring hinge 520, and the corresponding opening will be blocked by the sealing ring 530. Conversely, it will be unblocked. It is simple and easy to use.

[0028] The transfer chamber 700 also has an infusion tube 710 connected to the side of the needle hub 400, and the infusion tube 710 is located close to the root of the needle hub 400. Here, the infusion tube 710 serves the purpose of conduction. For example, when the infusion port 3001 generates suction force, the liquid entering from the needle hub 400 will only flow towards the infusion port 3001 which has negative pressure. When the infusion port 3001 is closed and the outlet port 1002 is open, positive pressure is generated in the transfer chamber 700, so that the liquid inside the syringe can be input into the needle hub 400 and the needle 600 through the infusion tube 710. The structure is simple and the combination is ingenious.

[0029] A support grid plate 810 for fixing the filter membrane 800 is also provided inside the outlet 1002. The support grid plate 810 includes a fixing ring 8101 fixed inside the outlet 1002 and a mesh 8102 disposed inside the fixing ring 8101 and in contact with the filter membrane 800. Here, the support grid plate 810 should be disposed on the right side of the filter membrane 800, i.e., in the outlet direction of the outlet 1002, to prevent the filter membrane 800 from being pushed out and slipping during the squeezing and discharging of liquid. Specifically, the filter membrane 800 covers the mesh 8102, and the mesh 8102 can abut and support the filter membrane 800, so that the filter membrane 800 can filter smoothly.

[0030] In summary, this embodiment of a disposable syringe with a filtering structure, when requiring the extraction and injection of medication, involves pulling the core rod 210 and piston 200, causing the medication in the container to pass directly through the needle 600 and needle seat 400 into the liquid guiding chamber 300 under strong negative pressure, opening the first check valve 500. This allows the liquid to flow directly into the inlet 1001 and the syringe 100 via the liquid guiding chamber 300. Simultaneously, the second check valve 900, under negative pressure, tightly seals the outlet 1002, preventing liquid from entering the syringe 100 from the transfer chamber 700. After the medication extraction is complete, the first check valve 500 automatically closes due to the removal of the negative pressure. Injection is then ready. When the medication in the syringe 100 is under positive pressure, it directly opens the second check valve 900 through the outlet 1002. The filter membrane 800 filters the flowing medication, trapping insoluble particles and other impurities inside the outlet 1002 and the syringe 100. The purified medication then passes through the transfer chamber 700 and the infusion tubing 710 back into the needle hub 400 and needle 600, thus achieving the purpose of clean injection. In summary, this disposable syringe is characterized by its simple structure, reasonable design, and safety and reliability. It can effectively filter insoluble particles and other impurities in the medication, ensuring the cleanliness of the medication while improving the clinical treatment effect.

[0031] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A disposable syringe with a filtering structure, characterized in that, The syringe includes a syringe (100), with a piston (200) inside the syringe (100). The syringe (100) has an inlet (1001) and an outlet (1002) at its front end. The syringe (100) has a liquid guiding chamber (300) covering the inlet (1001) on its outer side. The liquid guiding chamber (300) has a liquid guiding port (3001) at the opposite end of the inlet (1001). The liquid guiding chamber (300) has a needle seat (400) communicating with the liquid guiding port (3001) on its outer side. The liquid guiding chamber (300) has a first check valve (500) inside, which flows towards the inlet (1001). The syringe (100) has a piston (200) inside the syringe (100). The side also has a transfer chamber (700) covering the outlet (1002), the transfer chamber (700) is connected to the needle seat (400) through a pipeline, a filter membrane (800) is provided inside the outlet (1002), a second check valve (900) is provided inside the transfer chamber (700) to dredge towards the needle seat (400), and a support grid plate (810) for fixing the filter membrane (800) is also provided inside the outlet (1002). The support grid plate (810) includes a fixing ring (8101) fixed inside the outlet (1002) and a mesh grid (8102) provided inside the fixing ring (8101) and in contact with the filter membrane (800). The sealing surface of the first check valve (500) corresponds to the liquid inlet (3001), and the sealing surface of the second check valve (900) corresponds to the liquid outlet (1002).

2. A disposable syringe with a filtering structure according to claim 1, characterized in that: One end of the piston (200) is also connected to a core rod (210), and the core rod (210) extends to the outside of the syringe (100) from the opposite end of the piston (200).

3. A disposable syringe with a filtering structure according to claim 1, characterized in that: A needle (600) is also fitted onto the outer front end of the needle hub (400).

4. A disposable syringe with a filtering structure according to claim 1, characterized in that: The first check valve (500) and the second check valve (900) have the same structure; The first check valve (500) includes a valve cover (510), a torsion spring hinge (520) disposed at the connection between the valve cover (510) and the liquid guiding chamber (300), and a sealing ring (530) disposed on the periphery of the sealing surface of the valve cover (510).

5. A disposable syringe with a filtering structure according to claim 1, characterized in that: The transfer chamber (700) also has an infusion tube (710) connected to the side of the needle holder (400), and the infusion tube (710) is located close to the root of the needle holder (400).

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