A needle for venous blood sampling

Abstract

The utility model relates to the technical field of instruments, especially to a needle-pricking-preventing venous blood taking needle, which comprises a protective sleeve, a push rod and a needle tube, the push rod is slidably connected to the inner side of the protective sleeve, one end of the push rod is fixed with an extension, the end of the extension away from the push rod is fixed with the needle tube, the end of the needle tube away from the extension is fixed with a needle head, the inner side of the extension and the push rod is fixed with a hose, and one end of the hose is fixed with the needle tube, the needle-pricking-preventing mechanism and the auxiliary mechanism are structurally designed, so that after the blood taking process is completed, the needle head can quickly retreat to the inside of the protective sleeve due to the elastic property of the needle-pricking-preventing mechanism, a stable connection state is formed between the protruding head and the first gap, displacement of the extension is limited, the hose is prevented from being exposed again, the risk of needle-pricking injury caused by the exposure of the hose is eliminated from the source, and a solid guarantee is provided for the safety of medical staff and operators.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a needle-proof venous blood collection needle. Background Technology

[0002] In the sophisticated process of medical testing, lancets play a crucial role. They are specialized medical devices designed for the efficient and safe collection of human blood samples. They mainly consist of two core components—the needle tip and the needle shaft. The needle tip, which directly contacts the body and performs the puncture, is precisely positioned at the tip of the needle shaft. Specifically, the needle tip undergoes a special process to be both sharp to reduce pain during puncture and possess sufficient hardness and toughness to withstand the challenges of different skin types and blood vessel conditions.

[0003] For example, a novel venous blood collection needle with publication (announcement) number CN211534452U. The novel venous blood collection needle includes a vacuum blood collection tube, a connecting structure, a fixing structure, and a puncture structure. The connecting structure is connected to the vacuum blood collection tube; the fixing structure is connected to the connecting structure; the puncture structure is connected to the connecting structure; it includes a fixing rod, a first connecting rod, a fixing plate, a second connecting rod, and a second spring. The fixing rod is installed on the side wall of the connecting structure, one end of the second spring is installed on the side wall of the connecting structure, one end of the first connecting rod is fixedly connected to the other end of the second spring, the fixing plate is installed on the other end of the first connecting rod, and the second connecting rod is installed on the side wall of the first connecting rod.

[0004] In summary, the existing technology has the following technical problems: Although the existing technology can collect blood, medical staff are prone to needlestick injuries during the blood collection process, which leaves room for improvement. Therefore, we propose a needlestick-proof venous blood collection needle. Utility Model Content

[0005] The purpose of this invention is to provide a needle-proof venous blood collection needle to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A needle-proof venous blood collection needle includes a protective sleeve, a push rod, and a needle tube. The push rod is slidably connected to the inner side of the protective sleeve. An extension is fixed to one end of the push rod. A needle tube is fixed to the end of the extension away from the push rod. A needle tip is fixed to the end of the needle tube away from the extension. A flexible tube is fixed to the inner side of the extension and the push rod. One end of the flexible tube is fixed to the needle tube. A needle-proof mechanism is assembled on the inner side of the protective sleeve.

[0008] Preferably, the anti-needle-puncture mechanism includes a circular strip, a first spring, a positioning strip, an elastic inclined strip, and a guide assembly. A circular strip is fixed to the outer side of one end of the extension, a first spring is fixed to one side of the circular strip, one end of the first spring is fixed to the inner side of the protective sleeve, a positioning strip is fixed to one side of the extension, an elastic inclined strip is integrally fixed to one end of the positioning strip, one end of the elastic inclined strip is inclined away from the extension, and a guide assembly is assembled between the elastic inclined strip and the protective sleeve.

[0009] Preferably, the guide assembly includes a protruding head, a first notch, and a second notch. The end of the elastic inclined strip away from the positioning strip is integrally fixed with the protruding head. The outer side of the protective sleeve is provided with a first notch and a second notch corresponding to the position of the protruding head. Both the first notch and the second notch are clearance-fitted with the protruding head.

[0010] Preferably, the protruding head has an inclined anti-slip surface at one end near the elastic inclined strip.

[0011] Preferably, the outer side of the protective sleeve is also equipped with an auxiliary mechanism, which includes a convex block, a movable column, and a second spring. The convex block is fixed on the outer side of the protective sleeve at a position corresponding to the second notch. The inner side of the convex block communicates with the second notch. The movable column is slidably connected to the inner side of the convex block. The second spring is sleeved on the outer side of the movable column. One end of the second spring is fixed to the movable column, and the other end of the second spring is fixed to the inner side of the convex block.

[0012] Preferably, the end of the convex block away from the protective sleeve has a recess, and the end of the movable column away from the protective sleeve is located inside the recess.

[0013] It is clear without a doubt that the technical solution described above in this application can solve the technical problem that this application aims to address.

[0014] At the same time, through the above technical solutions, this utility model has at least the following beneficial effects:

[0015] This invention, through the structural design of the anti-needle-puncture mechanism and auxiliary mechanism, enables the needle to quickly retract into the protective sleeve after the blood collection process is completed, thanks to the elasticity of the anti-needle-puncture mechanism. This creates a stable connection between the protruding head and the first notch, limiting the displacement of the extension and preventing the tubing from re-exposing itself. This eliminates the risk of needlestick injuries that may be caused by tubing exposure, providing a solid guarantee for the safety of medical staff and operators. Attached Figure Description

[0016] 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 creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a cross-sectional structural diagram of the protective sleeve and convex block of this utility model;

[0019] Figure 3 This is a schematic diagram of the connection structure between the positioning strip and the elastic inclined strip of this utility model.

[0020] The attached diagram lists the components represented by each number as follows:

[0021] In the diagram: 1. Protective sleeve; 2. Push rod; 3. Needle tube; 4. Needle tip; 5. Tube; 6. Extension; 7. Circular strip; 8. First spring; 9. Positioning strip; 10. Elastic tilting strip; 11. Protruding head; 12. First notch; 13. Second notch; 14. Protruding block; 15. Movable column; 16. Second spring. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] Example 1

[0024] Reference Figure 1-2 A needle-proof venous blood collection needle includes a protective sleeve 1, a push rod 2, and a needle tube 3. The push rod 2 is slidably connected to the inner side of the protective sleeve 1. An extension 6 is fixed to one end of the push rod 2. The needle tube 3 is fixed to the end of the extension 6 away from the push rod 2. A needle tip 4 is fixed to the end of the needle tube 3 away from the extension 6. A flexible tube 5 is fixed to the inner side of the extension 6 and the push rod 2. One end of the flexible tube 5 is fixed to the needle tube 3. The inner side of the protective sleeve 1 is equipped with a needle-proof mechanism. The flexible tube 5 is connected to a negative pressure device or a syringe to facilitate blood collection.

[0025] The anti-needle-puncture mechanism includes a circular strip 7, a first spring 8, a positioning strip 9, an elastic inclined strip 10, and a guide assembly. The circular strip 7 is fixed to the outer side of one end of the extension 6, and the first spring 8 is fixed to one side of the circular strip 7. One end of the first spring 8 is fixed to the inner side of the protective sleeve 1. The positioning strip 9 is fixed to one side of the extension 6, and the elastic inclined strip 10 is integrally fixed to one end of the positioning strip 9. One end of the elastic inclined strip 10 is inclined away from the extension 6. A guide assembly is assembled between the elastic inclined strip 10 and the protective sleeve 1. Both the positioning strip 9 and the elastic inclined strip 10 are made of elastic material. In some other embodiments, they are made of metal or polymer material.

[0026] The guide assembly includes a protrusion 11, a first notch 12, and a second notch 13. The protrusion 11 is integrally fixed at one end of the elastic inclined strip 10 away from the positioning strip 9. The outer side of the protective sleeve 1 is provided with a first notch 12 and a second notch 13 corresponding to the position of the protrusion 11. The first notch 12 and the second notch 13 are both clearance-fitted with the protrusion 11. When the protrusion 11 contacts the second notch 13, under the push of the elastic force of the first spring 8, one end of the protrusion 11 contacts the second notch 13, while the other end does not contact.

[0027] The protruding head 11 has an inclined anti-slip surface at one end near the elastic inclined strip 10. By setting the inclined anti-slip surface, when the protruding head 11 is inside the first notch 12, the push rod 2 cannot be pushed without pressing the protruding head 11, thus forming a jammed state.

[0028] Example 2

[0029] Further optimizations to Example 1, specifically, such as... Figure 2-3 As shown, an auxiliary mechanism is also assembled on the outside of the protective sleeve 1. The auxiliary mechanism includes a protruding block 14, a movable column 15, and a second spring 16. A protruding block 14 is fixed on the outside of the protective sleeve 1 at a position corresponding to the second notch 13. The inner side of the protruding block 14 is connected to the second notch 13. The movable column 15 is slidably connected to the inner side of the protruding block 14. The second spring 16 is sleeved on the outer side of the movable column 15. One end of the second spring 16 is fixed to the movable column 15, and the other end of the second spring 16 is fixed to the inner side of the protruding block 14. There is an annular protrusion on the outer side of the movable column 15. The annular protrusion is slidably connected to the inner side of the protruding block 14, and one end of the annular protrusion is fixed to the second spring 16.

[0030] The end of the convex block 14 away from the protective sleeve 1 has a recess, and the end of the movable column 15 away from the protective sleeve 1 is inside the recess. The end of the movable column 15 is also inside the recess. The recess makes it less likely to accidentally touch the movable column 15 during blood collection.

[0031] In summary:

[0032] This utility model addresses the technical problem that, while existing technologies can achieve blood collection, medical personnel are prone to needlestick injuries during the process, indicating room for improvement. Therefore, we propose a needlestick-proof intravenous blood collection needle, employing the technical solutions described in the above embodiments. The implementation process of the above technical solution is as follows:

[0033] During blood collection, hold the push rod 2 with one hand and hold and press the protruding head 11 inside the first notch 12 with the thumb of the other hand, so that it comes into contact with the extension 6. At this time, the protruding head 11 separates from the first notch 12. At the same time, push the push rod 2, so that the push rod 2 drives the extension 6 to move along the inside of the protective sleeve 1 until the protruding head 11 moves and comes into contact with the inside of the protective sleeve 1 and then is released. Then continue to push the push rod 2, so that the circular strip 7 squeezes the first spring 8 to contract. When the protruding head 11 corresponds to the position of the second notch 13, the elastic inclined strip 10 drives the protruding head 11 to reset and rebound, so that the protruding head 11 connects with the second notch 13. At this time, the extension 6 is stably limited, thereby realizing that the extension 6 drives the needle tube 3 and the needle 4 to extend from the inside of the protective sleeve 1 to carry out blood collection.

[0034] After blood collection is completed, press the movable column 15, causing it to compress the second spring 16 until the movable column 15 passes through the second notch 13 and contacts the protruding head 11. Under the force of the movable column 15, the protruding head 11 is brought into contact with the extension 6 again. At the same time, the elastic force generated by the first spring 8 pushes the extension 6 to reset and move, so that the needle tube 3 and the needle 4 also reset and move. The protective sleeve 1 forms a protection for the needle 4, preventing the needle 4 from piercing the medical staff.

[0035] With the above-mentioned settings, this application will certainly solve the above-mentioned technical problems, and at the same time achieve the following technical effects:

[0036] This invention, through the structural design of the anti-needle-puncture mechanism and auxiliary mechanism, enables the needle 4 to quickly retract into the protective sleeve 1 after the blood collection process is completed, thanks to the elasticity of the anti-needle-puncture mechanism. This creates a stable connection between the protruding head 11 and the first notch 12, limiting the displacement of the extension 6 and preventing the tubing 5 from being exposed again. This eliminates the risk of needlestick injuries that may be caused by the exposure of the tubing 5, providing a solid guarantee for the safety of medical staff and operators.

[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A needle-proof venous blood collection needle, characterized in that, The device includes a protective sleeve (1), a push rod (2), and a needle tube (3). The push rod (2) is slidably connected to the inner side of the protective sleeve (1). An extension (6) is fixed to one end of the push rod (2). The needle tube (3) is fixed to the end of the extension (6) away from the push rod (2). A needle tip (4) is fixed to the end of the needle tube (3) away from the extension (6). A flexible tube (5) is fixed to the inner side of the extension (6) and the push rod (2). One end of the flexible tube (5) is fixed to the needle tube (3). An anti-needle puncture mechanism is assembled on the inner side of the protective sleeve (1). The anti-needle-puncture mechanism includes a circular strip (7), a first spring (8), a positioning strip (9), an elastic inclined strip (10), and a guide assembly. A circular strip (7) is fixed to the outer side of one end of the extension (6). A first spring (8) is fixed to one side of the circular strip (7). One end of the first spring (8) is fixed to the inner side of the protective sleeve (1). A positioning strip (9) is fixed to one side of the extension (6). An elastic inclined strip (10) is integrally fixed to one end of the positioning strip (9). One end of the elastic inclined strip (10) is inclined away from the extension (6). A guide assembly is assembled between the elastic inclined strip (10) and the protective sleeve (1).

2. The anti-needle-puncture venous blood collection needle according to claim 1, characterized in that, The guide assembly includes a protrusion (11), a first notch (12), and a second notch (13). The end of the elastic inclined strip (10) away from the positioning strip (9) is integrally fixed with the protrusion (11). The outer side of the protective sleeve (1) is provided with a first notch (12) and a second notch (13) corresponding to the position of the protrusion (11). The first notch (12) and the second notch (13) are both clearance-fitted with the protrusion (11).

3. The anti-needle-prick venous blood collection needle according to claim 2, characterized in that, The protruding head (11) has an inclined anti-slip surface at one end near the elastic inclined strip (10).

4. The anti-needle-puncture venous blood collection needle according to claim 2, characterized in that, An auxiliary mechanism is also assembled on the outside of the protective sleeve (1). The auxiliary mechanism includes a convex block (14), a movable column (15), and a second spring (16). A convex block (14) is fixed on the outside of the protective sleeve (1) at a position corresponding to the second notch (13). The inside of the convex block (14) is connected to the second notch (13). The movable column (15) is slidably connected to the inside of the convex block (14). The second spring (16) is sleeved on the outside of the movable column (15). One end of the second spring (16) is fixed to the movable column (15), and the other end of the second spring (16) is fixed to the inside of the convex block (14).

5. The anti-needle-puncture venous blood collection needle according to claim 4, characterized in that, The convex block (14) has a recess at the end away from the protective sleeve (1), and the movable column (15) is located inside the recess at the end away from the protective sleeve (1).

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