A filterable syringe with a stop-flow mechanism

Abstract

The application discloses a filterable syringe with a flow-stopping mechanism, which comprises a syringe, the bottom end of the syringe is integrally formed with a syringe head, the bottom end of the syringe head is provided with a connecting head, the bottom end of the connecting head is integrally formed with an upper filter cylinder, the bottom end of the upper filter cylinder is threadedly connected with a lower filter cylinder through a connecting mechanism, the inner wall of the lower filter cylinder is provided with a first filter assembly, the inside of the upper filter cylinder is provided with a second filter assembly, the bottom end of the lower filter cylinder is integrally formed with a liquid outlet head, the inner side wall of the liquid outlet head is integrally connected with one end of a fixing piece, the other end of the fixing piece is integrally connected with the side wall of a flow-stopping assembly, the upper filter cylinder and the lower filter cylinder are installed on the syringe head, and the flow-stopping assembly is installed in the liquid outlet head, so that the sample liquid can be prevented from flowing out of the inside of the liquid outlet head when the sample liquid is not injected.

Description

Technical Field

[0001] This invention relates to the field of syringe technology, specifically to a filterable syringe with a flow-stopping mechanism. Background Technology

[0002] In the process of transferring samples to sample bottles, laboratories often use a syringe to draw the sample in, and then use the syringe tip to aim at the bottle opening and push the syringe to inject the sample into the sample bottle.

[0003] However, in actual use, the samples are often not filtered well. Common filtration devices often only perform preliminary filtration through a filter membrane, which has poor filtration effect and strong resistance. As a result, when pushing the sample liquid with the syringe plunger during the experiment, the sample liquid is not easy to push out due to the resistance of the filter membrane. Moreover, after the sample is injected, the sample flows onto the side wall of the sample bottle or the table, causing contamination. Summary of the Invention

[0004] The purpose of this invention is to provide a filterable syringe with a flow-stopping mechanism. An upper filter and a lower filter are installed on the injection head of the syringe, and a flow-stopping component is installed inside the dispensing head. This prevents the sample from flowing out of the dispensing head when no sample is injected, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a filterable syringe with a flow-stopping mechanism, comprising:

[0006] A syringe, wherein an injection head is integrally formed at the bottom end of the syringe, the bottom end of the injection head is installed and inserted into a connector, an upper filter cylinder is integrally formed at the bottom end of the connector, a lower filter cylinder is threadedly connected to the bottom end of the upper filter cylinder through a mating mechanism, a first filter assembly is provided on the inner wall of the lower filter cylinder, a second filter assembly is installed inside the upper filter cylinder, a liquid outlet head is integrally formed at the bottom end of the lower filter cylinder, a partition is fixedly connected inside the liquid outlet head, a liquid outlet groove is provided in the center of the partition, the inner sidewalls of the liquid outlet head are integrally formed and connected to one end of a fixing member, and the other end of the fixing member is integrally formed and connected to the sidewall of a flow-stopping assembly;

[0007] The flow-stopping assembly includes a fixed cylinder, a limiting plate, a limiting groove, a limiting rod, a plug, a spring, a connecting rod, and a plug. The side wall of the fixed cylinder is integrally formed and connected to the other end of the fixing component. The limiting plate is slidably connected inside the fixed cylinder. The limiting plate has a limiting groove on its side wall. Limiting rods are fixedly connected to both sides of the inside of the fixed cylinder. The side walls of the limiting rods are slidably connected to the limiting grooves. A connecting rod is fixedly connected to the top of the limiting plate. A plug is fixedly connected to the top of the connecting rod. The plug engages with the inside of the liquid outlet groove. Plugs are fixedly connected to the bottom surface of the limiting plate and the bottom surface of the inside of the fixed cylinder. The ends of the plugs engage with the two ends of the spring.

[0008] Preferably, the docking mechanism includes a threaded groove, a threaded cylinder, and a sealing gasket. The threaded groove is formed inside the side wall of the upper filter cylinder, and the threaded cylinder is integrally formed on the bottom surface of the upper filter cylinder. The side wall of the threaded cylinder is threadedly connected to the threaded groove, and a sealing gasket is installed on the bottom surface of the threaded groove.

[0009] Preferably, the first filtration assembly includes a filter cylinder, a support rod, a membrane groove, a first fixing seat, and a first slot. The inner wall of the filter cylinder is fixedly connected with the support rod along the periphery of the side wall. The support rod and the side wall of the filter cylinder form a membrane groove, and a filter membrane is installed on the inner wall of the membrane groove.

[0010] Preferably, the inner wall of the filter cartridge is fixedly connected to one side wall of the first fixing seat, and the first fixing seat has a first slot inside.

[0011] Preferably, a first mounting base is fixedly connected inside the lower filter cartridge, and a first insert rod is fixedly connected to the top surface of the first mounting base, the first insert rod being inserted into the inside of the first slot.

[0012] Preferably, the second filter assembly includes a docking cylinder, a chute, a filter cylinder, a second fixing seat, and a second slot. The bottom of the docking cylinder is inserted into the interior of the filter cylinder. The inner side wall of the docking cylinder is provided with a chute. The filter cylinder is slidably connected to the side wall of the chute and engages with the bottom end of the filter cylinder.

[0013] Preferably, a second fixing seat is fixedly connected to the inner side wall of the docking cylinder, and a second slot is provided inside the second fixing seat.

[0014] Preferably, a second mounting base is fixedly connected to the inner side wall of the upper filter cylinder, and a second insertion rod is fixedly connected to the bottom surface of the second mounting base, with the bottom end of the second insertion rod inserted into the interior of the second slot.

[0015] Preferably, the filter cartridge has a funnel-shaped structure.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. This invention installs a first filter assembly and a second filter assembly inside the upper and lower filter cylinders. By installing a filter membrane on the side wall of the filter cylinder, the sample liquid can be filtered by the filter membrane when it enters the upper and lower filter cylinders. The traditional horizontal filter membrane is designed as a cylindrical filter membrane, which increases the filtration area of ​​the filter membrane and increases the flow rate of the sample liquid, thereby effectively and easily pushing the sample liquid into the sample bottle.

[0018] 2. This invention, by fixing a flow-stopping component to the inner wall of the dispensing head, allows the stopper in the flow-stopping component to be pushed when the sample passes through the dispensing groove, causing the stopper to separate from the dispensing groove. Simultaneously, the spring is compressed, and the limiting groove slides on the side wall of the limiting rod, allowing the sample solution to pass through the partition and be discharged from the dispensing head into the sample bottle. When the syringe is not pushed, the stopper can be re-blocked by the spring's reset action, effectively preventing the sample solution from flowing out of the dispensing head and thus preventing the sample solution from flowing from the inside of the dispensing head onto the side wall of the sample bottle or the table. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of the upper and lower filter cylinders of the present invention;

[0021] Figure 3 This is a schematic diagram of the internal structure of the first and second filter components of the present invention;

[0022] Figure 4 This is a schematic diagram of the flow-stopping component of the present invention.

[0023] In the diagram: 1. Syringe; 2. Injection head; 3. Connector; 4. Upper filter cartridge; 5. Lower filter cartridge; 6. Dispensing head; 7. Flow-stopping assembly; 71. Fixing cylinder; 72. Limiting plate; 73. Limiting groove; 74. Limiting rod; 75. Plug; 76. Spring; 77. Connecting rod; 78. Plug; 8. First filter assembly; 81. Filter cartridge; 82. Support rod; 83. Membrane tank; 84. First fixing seat; 85. First slot; 9. Second filter assembly; 91. Connecting cylinder; 92. Slide groove; 93. Filter cartridge; 94. Second fixing seat; 95. Second slot; 10. Partition; 11. Dispensing groove; 12. Filter membrane; 13. Second mounting seat; 14. Second insertion rod; 15. First mounting seat; 16. First insertion rod; 17. Fixing component; 18. Threaded groove; 19. Threaded cylinder; 20. Sealing gasket. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described 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.

[0025] Please see Figure 1-4 The present invention provides a technical solution: a filterable syringe with a flow-stopping mechanism, comprising:

[0026] Syringe 1 has an integrally formed injection head 2 at its bottom end. The bottom end of injection head 2 is installed and inserted into connector 3. The bottom end of connector 3 has an integrally formed upper filter cylinder 4. The bottom end of upper filter cylinder 4 is threadedly connected to lower filter cylinder 5 via a docking mechanism. The docking mechanism includes a threaded groove 18, a threaded cylinder 19, and a sealing gasket 20. The inner side wall of upper filter cylinder 4 has a threaded groove 18, and the bottom surface of upper filter cylinder 4 has an integrally formed threaded cylinder 19. The side wall of threaded cylinder 19 is threadedly connected to threaded groove 18, and sealing gasket 20 is installed on the bottom surface of threaded groove 18, enabling upper filter cylinder 4 to... By rotating, the threaded cylinder 19 separates from the lower filter cylinder 5, causing its sidewall to rise or fall within the threaded groove 18. This allows for the replacement or cleaning of the first filter assembly 8 and the second filter assembly 9 in the upper filter cylinder 4 and the lower filter cylinder 5. Simultaneously, a sealing gasket 20 is installed on the bottom surface of the threaded groove 18, ensuring that the threaded cylinder 19 contacts the sidewall of the sealing gasket 20 when it rotates to the bottom surface of the threaded groove 18. This guarantees a tight seal after the upper filter cylinder 4 and the lower filter cylinder 5 are connected, preventing water leakage from the gaps in the connection mechanism.

[0027] The inner wall of the lower filter cylinder 5 has a first filter assembly 8, which includes a filter cylinder 81, support rods 82, a membrane groove 83, a first fixing seat 84, and a first slot 85. The inner wall of the filter cylinder 81 is fixedly connected with support rods 82 along the periphery of the side wall. The support rods 82 and the side wall of the filter cylinder 81 form a membrane groove 83. A filter membrane 12 is installed on the inner wall of the membrane groove 83. The filter membrane 12 is abutted by multiple support rods 82 to ensure that the filter membrane 12 is installed on the inner side wall of the filter cylinder 81 and will not detach due to the filtration solution. A water groove is opened on the side wall of the filter cylinder 81 for the solution to pass through. The solution can enter the filter membrane 12 through the water groove, thereby enabling the solution to flow inside the filter cylinder 81.

[0028] The inner wall of the filter cartridge 81 is fixedly connected to one side wall of the first fixed seat 84. The first fixed seat 84 has a first slot 85 inside. The lower filter cartridge 5 is fixedly connected to the inside of the first mounting seat 15. The top surface of the first mounting seat 15 is fixedly connected to the first insertion rod 16. The first insertion rod 16 is inserted into the inside of the first slot 85. The filter cartridge 81 is inserted into the first insertion rod 16 through the first slot 85 inside the first fixed seat 84, so that the filter cartridge 81 can be installed inside the lower filter cartridge 5 and ensured to be installed in the center inside the lower filter cartridge 5. This ensures that the flow rate of the solution on both sides of the lower filter cartridge 5 is consistent when the solution flows inside the lower filter cartridge 5.

[0029] The upper filter cylinder 4 is equipped with a second filter assembly 9. The second filter assembly 9 includes a docking cylinder 91, a sliding groove 92, a filter cylinder 93, a second fixing seat 94, and a second slot 95. The bottom of the docking cylinder 91 is inserted into the interior of the filter cylinder 81. The sliding groove 92 is provided on the inner side wall of the docking cylinder 91. The filter cylinder 93 is slidably connected to the side wall of the sliding groove 92 and engages with the bottom end of the filter cylinder 93. The filter cylinder 93 has a funnel-shaped structure. By sliding the funnel-shaped filter cylinder 93 in the sliding groove 92 inside the docking cylinder 91, the solution can be preliminarily filtered after flowing down from the docking joint 3 through the funnel-shaped filter cylinder 93. Furthermore, the filter cylinder 93 installed in the docking cylinder 91 is installed in a sliding manner, which also facilitates the disassembly and cleaning of the filter cylinder 93.

[0030] A second fixing seat 94 is fixedly connected to the inner side wall of the docking cylinder 91. A second slot 95 is opened inside the second fixing seat 94. A second mounting seat 13 is fixedly connected to the inner side wall of the upper filter cylinder 4. A second insertion rod 14 is fixedly connected to the bottom surface of the second mounting seat 13. The bottom end of the second insertion rod 14 is inserted into the inside of the second slot 95. By inserting the second insertion rod 14 on the second mounting seat 13 into the second slot 95 inside the second fixing seat 94, the docking cylinder 91 can be installed in the center inside the upper filter cylinder 4, thereby enabling the docking cylinder 91 to dock with the filter cylinder 81.

[0031] The bottom end of the lower filter cylinder 5 is integrally formed with a liquid outlet head 6. A partition 10 is fixedly connected inside the liquid outlet head 6. A liquid outlet groove 11 is opened in the center of the partition 10. The inner sidewalls of the liquid outlet head 6 are integrally formed and connected to one end of the fixing member 17. The other end of the fixing member 17 is integrally formed and connected to the sidewall of the flow-stopping assembly 7. The flow-stopping assembly 7 includes a fixing cylinder 71, a limiting plate 72, a limiting groove 73, a limiting rod 74, a plug 75, a spring 76, a connecting rod 77, and a plug 78. The sidewall of the fixing cylinder 71 is integrally formed and connected to the other end of the fixing member 17. The inner side of the cylinder 71 is slidably connected to a limiting disk 72. The side wall of the limiting disk 72 is provided with a limiting groove 73. The inner sides of the fixed cylinder 71 are respectively fixedly connected to limiting rods 74. The side wall of the limiting rod 74 is slidably connected to the limiting groove 73. The top of the limiting disk 72 is fixedly connected to a connecting rod 77. The top of the connecting rod 77 is fixedly connected to a plug 78. The plug 78 is engaged with the inside of the liquid outlet groove 11. The bottom surface of the limiting disk 72 and the bottom surface of the inner side of the fixed cylinder 71 are both fixedly connected to plugs 75. The ends of the plugs 75 are engaged with the two ends of the spring 76 respectively.

[0032] Working principle: The syringe 1 draws the sample to be injected into the sample bottle into the syringe 1. Then, the connector 3 is aligned with the injection head 2 so that the injection head 2 can be inserted into the connector 3. Then, the dispensing head 6 is inserted into the bottle opening. The syringe 1 is pushed to push the sample through the connector 3 into the upper filter cylinder 4 and the lower filter cylinder 5. After the sample is filtered by the first filter assembly 8 and the second filter assembly 9, the sample solution passes through the dispensing groove 11 of the partition 10, which pushes the stopper 78 to separate it from the dispensing groove 11. At the same time, the connecting rod 77 moves downward, pushing the limiting plate 72 against the inner wall of the fixed cylinder 71. The upward sliding mechanism compresses the spring 76, allowing the limiting groove 73 to slide on the side wall of the limiting rod 74. After the sample solution passes through the outlet groove 11 on the partition 10, the sample can pass through the partition 10 and be discharged from the outlet head 6 into the sample bottle. When the sample bottle is about to be filled, the syringe 1 is stopped, and the solution inside the outlet head 6 stops pushing the stopper 78. Under the action of the elastic potential energy of the spring 76, the spring 76 is reset, which allows the stopper 78 to block the outlet groove 11 again, making it difficult for the sample to flow out of the outlet head 6. Thus, when the outlet head 6 is pulled out of the sample bottle, the sample will not flow from the inside of the outlet head 6 onto the side wall of the sample bottle or the table.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A filterable syringe with a flow-stopping mechanism, characterized in that, include: A syringe (1) has an injection head (2) integrally formed at the bottom end of the syringe (1). The bottom end of the injection head (2) is installed and inserted into a connector (3). The bottom end of the connector (3) has an upper filter cylinder (4) integrally formed. The bottom end of the upper filter cylinder (4) is threadedly connected to a lower filter cylinder (5) through a docking mechanism. The inner wall of the lower filter cylinder (5) has a first filter assembly (8). The upper filter cylinder (4) has a second filter assembly (9) installed inside. The bottom end of the lower filter cylinder (5) has an outlet head (6) integrally formed. The outlet head (6) has a partition plate (10) fixedly connected inside. The partition plate (10) has an outlet groove (11) at the center. The inner sidewalls of the outlet head (6) are integrally formed and connected to one end of a fixing member (17). The other end of the fixing member (17) is integrally formed and connected to the sidewall of a flow-stopping assembly (7). The flow-stopping assembly (7) includes a fixed cylinder (71), a limiting plate (72), a limiting groove (73), a limiting rod (74), a plug (75), a spring (76), a connecting rod (77), and a plug (78). The side wall of the fixed cylinder (71) is integrally formed and connected to the other end of the fixing member (17). The limiting plate (72) is slidably connected inside the fixed cylinder (71). The side wall of the limiting plate (72) has a limiting groove (73). The two sides inside the fixed cylinder (71) are respectively fixedly connected to... A limiting rod (74) is slidably connected to a limiting groove (73) on its side wall. A connecting rod (77) is fixedly connected to the top of the limiting plate (72). A plug (78) is fixedly connected to the top of the connecting rod (77). The plug (78) is engaged with the inside of the liquid outlet groove (11). A plug (75) is fixedly connected to the bottom surface of the limiting plate (72) and the bottom surface of the fixed cylinder (71). The ends of the plug (75) are engaged with the two ends of the spring (76).

2. A filterable syringe with a flow-stopping mechanism according to claim 1, characterized in that: The docking mechanism includes a threaded groove (18), a threaded cylinder (19), and a sealing gasket (20). The upper filter cylinder (4) has a threaded groove (18) inside its side wall, and the bottom surface of the upper filter cylinder (4) is integrally formed with a threaded cylinder (19). The side wall of the threaded cylinder (19) is threadedly connected to the threaded groove (18), and the bottom surface of the threaded groove (18) is fitted with a sealing gasket (20).

3. A filterable syringe with a flow-stopping mechanism according to claim 1, characterized in that: The first filter assembly (8) includes a filter cylinder (81), a support rod (82), a membrane groove (83), a first fixing seat (84), and a first slot (85). The inner wall of the filter cylinder (81) is fixedly connected with the support rod (82) along the periphery of the side wall. The support rod (82) and the side wall of the filter cylinder (81) form a membrane groove (83). A filter membrane (12) is installed on the inner wall of the membrane groove (83).

4. A filterable syringe with a flow-stopping mechanism according to claim 3, characterized in that: The inner wall of the filter cylinder (81) is fixedly connected to one side wall of the first fixed seat (84), and the first fixed seat (84) has a first slot (85) inside.

5. A filterable syringe with a flow-stopping mechanism according to claim 4, characterized in that: The lower filter cartridge (5) is fixedly connected to a first mounting base (15), and the top surface of the first mounting base (15) is fixedly connected to a first insert rod (16), which is inserted into the inside of the first slot (85).

6. A filterable syringe with a flow-stopping mechanism according to claim 5, characterized in that: The second filter assembly (9) includes a docking cylinder (91), a sliding groove (92), a filter cylinder (93), a second fixing seat (94), and a second slot (95). The bottom of the docking cylinder (91) is inserted into the interior of the filter cylinder (81). The sliding groove (92) is provided on the inner side wall of the docking cylinder (91). The filter cylinder (93) is slidably connected to the side wall of the sliding groove (92) and engaged with the bottom end of the filter cylinder (93).

7. A filterable syringe with a flow-stopping mechanism according to claim 6, characterized in that: The inner sidewall of the docking cylinder (91) is fixedly connected to a second fixing seat (94), and the second fixing seat (94) has a second slot (95) inside.

8. A filterable syringe with a flow-stopping mechanism according to claim 7, characterized in that: The inner side wall of the upper filter cylinder (4) is fixedly connected to a second mounting base (13), and the bottom surface of the second mounting base (13) is fixedly connected to a second insertion rod (14), the bottom end of the second insertion rod (14) being inserted into the interior of the second slot (95).

9. A filterable syringe with a flow-stopping mechanism according to claim 7, characterized in that: The filter cartridge (93) has a funnel-shaped structure.

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