Blood taking needle with splash-proof tail end
By designing an automatically resetting sheath structure, the problem of blood splashing out from the tip of the blood collection needle was solved, achieving hygienic protection of the blood collection environment and improving the safety of the blood collection process.
Patent Information
- Application Number
- CN202422816455.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-11-19
AI Technical Summary
When the tip of the blood collection needle is pulled out, residual blood can easily be flung to the outside, affecting the blood collection environment and posing a hygiene hazard.
A splash-proof blood collection needle with an automatically resetting sheath structure is designed. The sheath moves outward with the needle rod under the action of a spring, keeping it in close contact with the vacuum blood collection tube. Blood splashed into the sheath at the end of the needle rod is prevented from splashing out.
It effectively prevents blood from splashing, improves the hygiene of the blood collection environment, and reduces the risk of infection for medical staff.
Smart Images
Figure CN223640715U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, specifically to a splash-proof blood collection needle. Background Technology
[0002] Blood collection refers to the process by which medical personnel collect blood samples through veins, arteries, or capillaries. These blood samples are used for various biochemical, hematological, and microbiological analyses to help doctors diagnose diseases, develop treatment plans, and monitor treatment effectiveness. The lancet serves as the connecting channel between the blood inside the body and the external blood collection test tube container. It is mainly used to puncture peripheral blood vessels (such as veins in the elbow of the upper limb) to collect a certain amount of peripheral fresh blood as a sample for testing.
[0003] The tip of the blood collection needle is usually made of plastic tubing, which is inserted directly into the vacuum blood collection tube during use. However, when it is pulled out, the blood remaining at the tip is easily flung to the outside, affecting the blood collection environment. The blood may come into direct contact with medical staff, posing a health hazard. Utility Model Content
[0004] This invention addresses the problem that the ends of blood collection needles typically use plastic tubes, which are directly inserted into vacuum blood collection tubes during use. However, when these tubes are pulled out, residual blood at the ends is easily splashed outwards, affecting the blood collection environment and potentially causing direct contact between the blood and medical personnel, posing a health hazard. This invention provides a splash-proof blood collection needle.
[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a splash-proof blood collection needle, including a needle tip, a needle tube, a connecting seat, a needle rod, and a sheath. The needle tip, needle tube, and connecting seat are connected in sequence. The needle tip and needle rod are each equipped with a protective sheath. The needle rod includes a plug and a connector. The plug is inserted into the connecting seat. The sheath is located outside the connecting seat and the needle rod. The lower end of the connecting seat is provided with an expansion ring, and the expansion ring is symmetrically provided with guide holes.
[0006] The sheath moves back and forth between the connector and the needle bar, providing external protection for the insertion bar without affecting the connection between the needle bar and the blood collection tube.
[0007] As an improvement, the diameter of the insertion rod gradually increases from top to bottom, and the lower end of the insertion rod is provided with several sealing rings.
[0008] As an improvement, the sheath is provided with an upper ring and a lower ring on the upper and lower sides respectively. The upper ring is sleeved on the outside of the connecting seat and slidably connected to the connecting seat. A guide rod is symmetrically provided between the upper ring and the lower ring. A spring is sleeved on the guide rod. The spring is fixed between the lower ring and the expansion ring. In the natural state of the sheath, the lower ring is located below the insertion rod.
[0009] As an improvement, the upper end of the connector is provided with a thickened grip ring.
[0010] The advantages of this invention are as follows: Unlike the general direct-insertion connection method, this invention uses an automatically resetable sheath to shield and protect the needle bar at the end. After blood collection, during the process of pulling out the needle bar, the sheath remains in contact with the vacuum blood collection tube under the action of the spring as the needle bar moves outward. The blood brought out by the end of the needle bar splashes outward into the sheath, which can prevent the blood at the end of the needle bar from splashing outward and affecting the blood collection environment, thus improving the hygiene of this invention. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of this utility model.
[0012] Figure 2 This is an exploded structural diagram of the present invention.
[0013] Figure 3 This is a cross-sectional view of the sheath of this utility model.
[0014] As shown in the figure: 1. Needle tip; 2. Needle tube; 3. Connector; 4. Needle bar; 5. Sheath; 6. Expander ring; 7. Guide hole; 8. Sealing ring; 9. Upper ring; 10. Lower ring; 11. Guide rod; 12. Spring; 13. Grip ring; 41. Insert rod; 42. Plug. Detailed Implementation
[0015] The present invention will now be described in further detail with reference to the accompanying drawings.
[0016] Combined with appendix Figure 1 , Figure 2 , Figure 3 A splash-proof blood collection needle includes a needle tip 1, a needle tube 2, a connecting seat 3, a needle shaft 4, and a sheath 5. The needle tip 1, needle tube 2, and connecting seat 3 are connected in sequence. The needle shaft 4 includes a plug 41 and a connector 42. The plug 41 is inserted into the connecting seat 3. The sheath 5 is located outside the connecting seat 3 and the needle shaft 4. The lower end of the connecting seat 3 is provided with an expansion ring 6, and the expansion ring 6 is symmetrically provided with guide holes 7.
[0017] The sheath 5 moves back and forth between the connecting seat 3 and the needle bar 4, externally shielding the insertion rod 41 without affecting the connection between the needle bar 4 and the blood collection tube.
[0018] The diameter of the insertion rod 41 gradually increases from top to bottom. The lower end of the insertion rod 41 is provided with several sealing rings 8. The internal structure of the connecting seat 3 is the same as that of the insertion rod 41. The insertion rod 41 is inserted and fixed in the connecting seat 3 and the sealing performance is improved by the sealing rings 8.
[0019] The sheath 5 is provided with an upper ring 9 and a lower ring 10 on its upper and lower sides, respectively. The upper ring 9 is sleeved on the outside of the connecting seat 3 and is slidably connected to the connecting seat 3. A guide rod 11 is symmetrically provided between the upper ring 9 and the lower ring 10. A spring 12 is sleeved on the guide rod 11. The spring 12 is fixed between the lower ring 10 and the expansion ring 6. The sheath 5 can move up and down stably on the outside of the connecting seat 3. After the sheath 5 moves up, the needle bar 4 is exposed.
[0020] The upper end of the connector 3 is provided with a thickened grip ring 13, which makes it convenient to hold the connector 3 for operation and avoids the movement of the guard ring affecting the hand operation of the connector 3.
[0021] Implementation Case: Take a vacuum blood collection tube, hold the grip ring 13, place the lower ring 10 of the sheath 5 on top of the vacuum blood collection tube and apply downward force. When the plug 42 is inserted, the sheath 5 is pushed up by the vacuum blood collection tube. After blood collection, pull out the probe 41. During this process, the sheath 5 remains in contact with the vacuum blood collection tube as the needle rod 4 moves outward under the action of the spring 12 until the plug 42 is completely separated from the vacuum blood collection tube. The blood brought out by the end of the probe 41 splashes outward into the inside of the sheath 5.
[0022] In practical implementation, the protective sleeves of the needle and plug are removed. The hand holds the sleeve against the vacuum blood collection tube and presses it down. After the plug is inserted, the sleeve moves up, the guide rod slides in the guide hole and the spring is compressed. The sleeve is naturally lifted by the vacuum blood collection tube. After blood collection, the connector is pulled out and the plug is pulled out. Under the action of the spring, the sleeve is automatically pushed and held outside the insertion rod, and the blood at the end of the insertion rod is splashed inside the sleeve.
[0023] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.
Claims
1. A splash-proof blood collection needle, characterized in that: It includes a needle (1), a needle tube (2), a connecting seat (3), a needle bar (4), and a sheath (5). The needle (1), needle tube (2), and connecting seat (3) are connected in sequence. The needle bar (4) includes a plug (41) and a connector (42). The plug (41) is fixedly connected to the connecting seat (3). The sheath (5) is located outside the connecting seat (3) and the needle bar (4). The lower end of the connecting seat (3) is provided with an expansion ring (6), and the expansion ring (6) is symmetrically provided with guide holes (7).
2. The splash-proof blood collection needle according to claim 1, characterized in that: The diameter of the insertion rod gradually increases from top to bottom, and the lower end of the insertion rod is provided with several sealing rings (8).
3. The splash-proof blood collection needle according to claim 1, characterized in that: The sheath (5) is provided with an upper ring (9) and a lower ring (10) on its upper and lower sides respectively. The upper ring (9) is sleeved on the outside of the connecting seat (3) and is slidably connected to the connecting seat (3). A guide rod (11) is symmetrically provided between the upper ring (9) and the lower ring (10). A spring (12) is sleeved on the guide rod (11). The spring (12) is fixed between the lower ring (10) and the expansion ring (6).
4. The anti-splash blood collection needle according to claim 1, characterized in that: The upper end of the connecting seat (3) is provided with a thickened grip ring (13).