Blood taking needle pressure adjusting device

Abstract

The utility model discloses a blood taking needle pressure regulating device, which relates to the field of blood taking needle negative pressure regulation and comprises a vein puncture needle, the output end of the vein puncture needle is fixedly connected with a connecting tube, butterfly wings protruding outwards are formed on the two sides of the outer wall of the connecting tube, the output end of the connecting tube is connected with a hose, and the hose is connected with a valve. The output end of the hose is connected with a butt joint in butt joint with a blood collection tube, a micropore is formed in the output end of the butt joint, a protruding tube protruding outwards is integrally formed on the periphery of the butt joint, an inner cavity of the protruding tube is communicated with an inner cavity of the butt joint, and the outer wall of the output end of the protruding tube is in threaded connection with a connector. And a one-way mechanism is arranged in the connector. Through the arrangement of the connector, the rubber sheet, the needle head and the one-way mechanism, the negative pressure effect of the blood taking needle can be improved, blood can flow more smoothly, external air cannot enter the blood taking needle, and the cleanliness of the blood taking needle is kept.

Description

Technical Field

[0001] This utility model relates to the field of negative pressure regulation of blood collection needles, specifically a blood collection needle pressure regulating device. Background Technology

[0002] When using a blood collection needle, the venous blood collection needle is inserted into a human vein, and the other end is connected to a blood collection tube. The blood collection tube is generally designed with negative pressure, which allows blood to flow into the blood collection tube autonomously.

[0003] However, because there is a cavity in the rubber part of the blood collection needle, air can easily enter, resulting in insufficient negative pressure in the blood collection tube. Utility Model Content

[0004] The purpose of this utility model is to provide a blood collection needle pressure regulating device in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a blood collection needle pressure regulating device, comprising a venous puncture needle, the output end of which is fixedly connected to a connecting tube, the outer wall of which is formed with outwardly protruding butterfly wings on both sides, the output end of which is connected to a flexible tube, the output end of which is connected to a connector for docking with a blood collection tube, the output end of which has a micro-hole, the outer circumference of which is integrally formed with an outwardly protruding tube, the inner cavity of which is connected to the inner cavity of which is connected to the inner cavity of which is connected, the outer wall of the output end of which is threadedly connected to a connector, and the connector is provided with a one-way mechanism inside.

[0006] As a further improvement of this utility model: a rubber sheet is fixedly installed on the inner wall of the protruding tube, and a needle for piercing the rubber sheet is installed at one end of the connector.

[0007] As a further embodiment of this utility model: the one-way mechanism includes a receiving groove opened inside the connector, the input end of the receiving groove has a "convex" cross-section, the input end of the receiving groove has a narrow opening, a sealing ball is provided inside the input end of the receiving groove, a connecting plate is integrally formed on the outer periphery of the sealing ball and at a position symmetrical to the input end of the receiving groove, and a sliding hole is opened inside the connecting plate.

[0008] As a further embodiment of this utility model: the one-way mechanism further includes a guide post slidably connected to the inner wall of the sliding hole, the two ends of the guide post being fixedly connected to the two ends of the wide opening of the receiving groove, and a spring abutting between the connecting plate and one end of the inner wall of the receiving groove, the spring being sleeved on the outer periphery of the guide post.

[0009] As a further improvement of this utility model: the connecting plate is further provided with two air holes, which are not blocked by the sealing ball.

[0010] As a further improvement of this utility model: the connector has an inlet at the output end of the receiving groove, and the inlet is connected to the inner cavity of the receiving groove.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. By setting up a connector, rubber sheet, needle and one-way mechanism, the negative pressure effect of the blood collection needle can be improved, which facilitates smoother blood flow and prevents external air from entering the blood collection needle, thus maintaining the cleanliness of the blood collection needle. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the installation of the one-way mechanism of this utility model;

[0015] Figure 3 For the present utility model Figure 2 Enlarged view of a portion of point A in the middle;

[0016] Figure 4 This is a schematic diagram of the connecting plate of this utility model.

[0017] In the diagram: 1. Intravenous puncture needle; 2. Connecting tube; 3. Flexible tube; 4. Connector; 5. Protruding tube; 6. Connector head; 7. Micropore; 8. Rubber sheet; 9. Needle; 10. Receiving groove; 11. Inlet; 12. Connecting plate; 13. Occlusive ball; 14. Guide post; 15. Spring; 16. Air hole; 17. Sliding hole. Detailed Implementation

[0018] 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 embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-4In this embodiment of the present invention, a blood collection needle pressure regulating device includes a venous puncture needle 1. The output end of the venous puncture needle 1 is fixedly connected to a connecting tube 2. The outer walls of the connecting tube 2 are formed with outwardly protruding butterfly wings on both sides. The output end of the connecting tube 2 is connected to a flexible tube 3. The output end of the flexible tube 3 is connected to a connector 4 for docking with the blood collection tube. The output end of the connector 4 is provided with a microhole 7. The outer circumference of the connector 4 is integrally formed with an outwardly protruding tube 5. The inner cavity of the protruding tube 5 is connected to the inner cavity of the connector 4. The outer wall of the output end of the protruding tube 5 is threadedly connected to a connector 6. The connector 6 is provided with a one-way mechanism inside.

[0020] In this embodiment: First, before blood collection, the connector 4 is inserted into the blood collection tube. Then, the connector 6 is threaded to the outer wall of the protruding tube 5. After the connection is completed, the syringe is threaded to the output end of the connector 6. After the connection is completed, the venous puncture needle 1 is inserted into the vein of the person being blood collected by pinching the butterfly wing with the hand. At this time, under negative pressure, the blood flows into the blood collection tube. If there is insufficient negative pressure, resulting in the blood not flowing smoothly into the blood collection tube, the syringe can be pulled by hand. The negative pressure formed by pulling the syringe outward acts on the one-way mechanism, opening the one-way mechanism. The continuous pulling of the syringe can increase the negative pressure effect and promote the effective flow of blood.

[0021] It should be noted that the syringe is a specially made syringe with external threads formed on the outside of its connecting nozzle, and internal threads formed on the inner wall of the inlet 11 that mesh with the external threads. The connection between the two threads can maintain the connection stability of the syringe.

[0022] Please refer to this carefully. Figure 2 and Figure 3 A rubber sheet 8 is fixedly installed on the inner wall of the protruding tube 5, and a needle 9 that pierces the rubber sheet 8 is installed at one end of the connector 6.

[0023] In this embodiment: during the tightening process of connector 6, connector 6 drives needle 9 to pierce rubber sheet 8.

[0024] Please refer to this carefully. Figure 3 and Figure 4 The one-way mechanism includes a receiving groove 10 inside the connector 6. The input end of the receiving groove 10 has a convex cross-section and a narrow opening. A blocking ball 13 is provided inside the input end of the receiving groove 10. A connecting plate 12 is integrally formed on the outer periphery of the blocking ball 13 and at a position symmetrical to the input end of the receiving groove 10. A sliding hole 17 is provided inside the connecting plate 12. The one-way mechanism also includes a guide post 14 slidably connected to the inner wall of the sliding hole 17. The two ends of the guide post 14 are fixedly connected to the two ends of the wide opening of the receiving groove 10. A spring 15 is abutted between the connecting plate 12 and one end of the inner wall of the receiving groove 10. The spring 15 is sleeved on the outer periphery of the guide post 14.

[0025] In this embodiment: when the negative pressure is insufficient, by pulling the syringe, as the piston inside the syringe moves outward, a negative pressure is formed. At this time, the sealing ball 13 moves under the negative pressure, so that the inner cavity of the receiving groove 10 is connected to the inner cavity of the protruding tube 5 through the needle 9. The negative pressure can then act on the inside of the protruding tube 5 to achieve the purpose of extracting excess air, thereby ensuring the negative pressure.

[0026] During the movement of the blocking ball 13, the blocking ball 13 drives the connecting plate 12 to move along the outer wall of the guide post 14, at which time the spring 15 is compressed.

[0027] Please refer to this carefully. Figure 4 The connecting plate 12 also has two air holes 16 inside, which are not blocked by the sealing ball 13. The connector 6 has an inlet 11 at the output end of the receiving groove 10, and the inlet 11 is connected to the inner cavity of the receiving groove 10.

[0028] In this embodiment: after the blocking ball 13 moves, the suction force draws out the excess air from the vent 16.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A blood collection needle pressure regulating device, comprising a venous puncture needle (1), characterized in that, The output end of the venous puncture needle (1) is fixedly connected to a connecting tube (2). The outer walls of the connecting tube (2) are formed with outwardly protruding butterfly wings. The output end of the connecting tube (2) is connected to a flexible tube (3). The output end of the flexible tube (3) is connected to a connector (4) for docking with the blood collection tube. The output end of the connector (4) is provided with a micro-hole (7). The outer circumference of the connector (4) is integrally formed with an outwardly protruding tube (5). The inner cavity of the protruding tube (5) is connected to the inner cavity of the connector (4). The outer wall of the output end of the protruding tube (5) is threaded with a connector (6). The connector (6) is provided with a one-way mechanism inside.

2. The blood collection needle pressure regulating device according to claim 1, characterized in that, A rubber sheet (8) is fixedly installed on the inner wall of the protruding tube (5), and a needle (9) for piercing the rubber sheet (8) is installed at one end of the connector (6).

3. The blood collection needle pressure regulating device according to claim 2, characterized in that, The one-way mechanism includes a receiving groove (10) opened inside the connector (6). The input end of the receiving groove (10) has a "convex" cross-section and a narrow opening. A blocking ball (13) is provided inside the input end of the receiving groove (10). A connecting plate (12) is integrally formed on the outer periphery of the blocking ball (13) and at a position symmetrical to the input end of the receiving groove (10). A sliding hole (17) is opened inside the connecting plate (12).

4. The blood collection needle pressure regulating device according to claim 3, characterized in that, The one-way mechanism also includes a guide post (14) slidably connected to the inner wall of the sliding hole (17). The two ends of the guide post (14) are fixedly connected to the two ends of the wide opening of the receiving groove (10). A spring (15) is abutted between the connecting plate (12) and one end of the inner wall of the receiving groove (10). The spring (15) is sleeved on the outer periphery of the guide post (14).

5. A blood collection needle pressure regulating device according to claim 4, characterized in that, The connecting plate (12) also has two air holes (16) inside, which are not blocked by the sealing ball (13).

6. The blood collection needle pressure regulating device according to claim 5, characterized in that, The connector (6) has an inlet (11) at the output end of the receiving groove (10), and the inlet (11) is connected to the inner cavity of the receiving groove (10).

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