Disposable safe blood taking needle

Abstract

The utility model relates to the technical field of blood sampling instruments, in particular to a disposable safety blood sampling needle which comprises a blood transfusion tube, a blood collection mechanism is installed at one end of the blood transfusion tube, a catheter is fixedly installed at the other end of the blood transfusion tube, and a needle head protection assembly is arranged outside the catheter in a sleeved mode. The needle head protection assembly comprises a threaded sleeve, a connecting base, a reset spring, a fixing ring, a nut and a telescopic pipe, the threaded sleeve is arranged outside the catheter in a sleeving mode, the connecting base is installed at one end of the threaded sleeve, the fixing ring is in threaded connection with the other end of the threaded sleeve, and the nut is installed on the threaded sleeve. The reset spring is fixedly installed between the connecting base and the fixing ring, the nut is movably installed on one side of the fixing ring, the telescopic pipe is arranged outside the fixing ring in a sleeving mode, and a blood sampling needle is installed at the top end of the catheter. By integrating the needle head protection assembly, the protection function after blood sampling is achieved, and the risk that the blood sampling needle pricks medical staff and medical waste treatment staff is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of blood collection instruments, in particular to a disposable safety blood collection needle. Background Art

[0002] A lancet is an important instrument in the medical field for sampling blood from patients. A lancet is generally a split-type lancet and is mostly used in clinical practice. A disposable safety lancet usually includes a needle, a syringe, a needle holder and other parts, and may be equipped with a special safety mechanism to prevent the needle from being exposed again after use.

[0003] The steel needle at the end of the blood collection needle that punctures the human body is currently protected by an independent sheath. When in use, the operator first removes the protective sheath of the steel needle to draw blood. After blood collection, the needle is pulled out of the human body and is exposed. If the steel needle at the puncture end of the blood collection needle is protected and then discarded directly in an exposed state, there will be a risk of injuring medical staff and medical waste disposal personnel, thereby causing infectious biological risks, and the consequences will be even more unimaginable. Utility Model Content

[0004] The present invention aims to solve the problems existing in the prior art and provides the following technical solutions:

[0005] A disposable safety blood collection needle comprises a blood transfusion tube, one end of which is equipped with a blood collection mechanism, the other end of which is fixedly equipped with a catheter, the outer sleeve of which is provided with a needle protection assembly, the needle protection assembly comprising a threaded sleeve, a connecting seat, a return spring, a fixing ring, a nut and a telescopic tube, the threaded sleeve being sleeved on the outer side of the catheter, the connecting seat being mounted on one end of the threaded sleeve, the fixing ring being threadedly connected to the other end of the threaded sleeve, the return spring being fixedly mounted between the connecting seat and the fixing ring, the nut being movably mounted on one side of the fixing ring, the telescopic tube being sleeved on the outer side of the fixing ring, and the top end of the catheter being equipped with a blood collection needle.

[0006] As an improvement of the above technical solution, the blood collection needle and the threaded sleeve are both located inside the telescopic tube, and the interior of the blood collection needle and the catheter are both sealed and connected to the interior of the blood transfusion tube.

[0007] As an improvement of the above technical solution, a needle handle is installed on one side of the needle protection assembly, and the needle handle is arranged in a trapezoidal shape. The needle handle is sleeved and installed on the outside of the catheter.

[0008] As an improvement of the above technical solution, a sealing film is bonded to the outside of the fixing ring, the bottom inner wall of one end of the telescopic tube is sealed and fitted with the sealing film, and the other end of the telescopic tube is telescoped to the top of the blood collection needle.

[0009] As an improvement of the above technical solution, the telescopic tube is a corrugated telescopic tube, and the material of the telescopic tube is transparent plastic.

[0010] Beneficial effects of the utility model:

[0011] 1. The blood transfusion tube is responsible for guiding the collected blood from the blood collection needle to the blood collection mechanism. The telescopic tube is set on the outside of the fixed ring, which not only provides an extra layer of protection for the entire needle protection assembly, but also allows the blood collection needle to have a certain amount of movement space when extending and retracting, ensuring the flexibility of the blood collection needle during the blood collection process. At the same time, it also ensures that the needle can be completely wrapped when not in use to prevent punctures caused by exposure. By integrating the needle protection assembly, the automatic protection function after blood collection is realized, which greatly reduces the risk of blood collection needles pricking medical staff and medical waste disposal personnel.

[0012] 2. The telescopic tube can extend and wrap around the blood collection needle under the action of the reset spring to form a closed protective layer. This not only prevents the risk of puncture caused by the exposed blood collection needle, but also prevents blood from leaking from the needle. The length of the telescopic tube is designed to be able to be extended to the top of the blood collection needle, reducing the risk of puncture caused by the exposed needle after blood collection. The telescopic tube is made of medical-grade transparent plastic, allowing medical staff to clearly observe the position of the blood collection needle and the blood collection process, thereby more accurately controlling the blood collection operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is the overall structural diagram of the utility model;

[0014] Figure 2 This is an expanded view of the telescopic tube and the fixing ring of the utility model;

[0015] Figure 3 This is the structure diagram of the return spring of the utility model;

[0016] Figure 4 This is the structural diagram of the threaded sleeve of the utility model;

[0017] Figure 5 This is a normal diagram of the reset spring of the utility model when it is stretched;

[0018] Figure 6 This is a normal diagram of the telescopic tube of the utility model when stretched.

[0019] Figure numerals: 1. blood transfusion tube; 2. blood collection mechanism; 3. catheter; 4. needle handle; 5. needle protection assembly; 51. threaded sleeve; 52. connecting seat; 53. return spring; 54. fixing ring; 541. sealing membrane; 55. nut; 56. telescopic tube; 6. blood collection needle. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] See also Figure 1-6 , the utility model provides a technical solution:

[0022] A disposable safety blood collection needle comprises a blood transfusion tube 1, one end of which is provided with a blood collecting mechanism 2, the other end of which is fixedly provided with a catheter 3, the outer sleeve of the catheter 3 is provided with a needle protection assembly 5, the needle protection assembly 5 comprises a threaded sleeve 51, a connecting seat 52, a return spring 53, a fixing ring 54, a nut 55 and a telescopic tube 56, the threaded sleeve 51 is sleeved on the outer side of the catheter 3, the connecting seat 52 is installed at one end of the threaded sleeve 51, the fixing ring 54 is threadedly connected to the other end of the threaded sleeve 51, the return spring 53 is fixedly installed between the connecting seat 52 and the fixing ring 54, the nut 55 is movably installed on one side of the fixing ring 54, the telescopic tube 56 is sleeved on the outer side of the fixing ring 54, and a blood collection needle 6 is installed on the top of the catheter 3.

[0023] In this embodiment, the blood transfusion tube 1 is responsible for guiding the collected blood from the blood collection needle 6 to the blood collection mechanism 2 to ensure smooth blood transmission. The catheter 3 is fixedly installed at the other end of the blood transfusion tube 1 to play a connecting role. The threaded sleeve 51 is sleeved on the outside of the catheter 3. The connecting seat 52 is installed at one end of the threaded sleeve 51 for connecting the reset spring 53. The fixing ring 54 is threadedly connected to the other end of the threaded sleeve 51 and is connected to the other end of the reset spring 53. By rotating the fixing ring 54, the preload force of the reset spring 53 can be adjusted to control the extension and retraction of the telescopic tube 56. The nut 55 is installed on one side of the fixing ring 54 as a locking device to prevent the fixing ring 54 from accidentally rotating during the blood collection process to ensure the reset spring The stability of the spring 53 and the telescopic tube 56. The telescopic tube 56 is sleeved on the outside of the fixed ring 54, which not only provides an extra layer of protection for the entire needle protection assembly 5, but also allows the blood collection needle 6 to have a certain amount of movement space when extending and retracting. This design ensures the flexibility of the blood collection needle 6 during the blood collection process, and also ensures that the needle can be completely wrapped when not in use to prevent exposure and puncture. When the blood collection is completed, the return spring 53 uses elastic potential energy to extend the telescopic tube 56 to the top of the catheter 3. After stretching, the telescopic tube 56 wraps the blood collection needle 6 inside. By integrating the needle protection assembly 5, the automatic protection function after blood collection is realized, which greatly reduces the risk of blood collection needles pricking medical staff and medical waste disposal personnel.

[0024] Specifically, the blood collection needle 6 and the threaded sleeve 51 are both located inside the telescopic tube 56 , and the blood collection needle 6 and the interior of the catheter 3 are both sealed and connected to the interior of the blood transfusion tube 1 .

[0025] In this embodiment, the blood collection needle 6 and the threaded sleeve 51 are both located inside the telescopic tube 56, which not only helps to protect the blood collection needle 6 from external contamination and the risk of accidental puncture, but also makes the entire blood collection device more compact and integrated. The blood collection needle 6 and the interior of the catheter 3 are sealed and connected to the interior of the blood transfusion tube 1. The sealed connection is the key to ensuring smooth blood transmission and preventing blood leakage during the blood collection process. Through strict sealing design, the pollution and waste caused by leakage of blood during the transmission process can be effectively avoided, and the safety of medical staff can also be guaranteed. When the blood collection is completed, the telescopic tube 56 can extend and wrap around the blood collection needle 6 under the action of the reset spring 53 to form a closed protective layer, which can not only prevent the risk of puncture caused by the exposure of the blood collection needle 6 to the outside, but also prevent blood from leaking from the needle.

[0026] Specifically, a needle handle 4 is installed on one side of the needle protection assembly 5 , and the needle handle 4 is arranged in a trapezoidal shape. The needle handle 4 is sleeved and installed on the outside of the catheter 3 .

[0027] In this embodiment, the needle handle 4 is mounted on the outside of the catheter 3 and fits tightly with the catheter 3 to form an integral structure, so that the needle handle 4 can be firmly fixed on the blood collection needle without causing any obstruction to the blood collection process. When collecting blood, medical staff can easily hold the needle handle 4 and accurately complete the blood collection operation by controlling the direction and force of the needle handle 4.

[0028] Specifically, a sealing film 541 is bonded to the outside of the fixing ring 54 , the bottom inner wall of one end of the telescopic tube 56 is sealed and fitted with the sealing film 541 , and the other end of the telescopic tube 56 is telescoped to the top of the blood collection needle 6 .

[0029] In this embodiment, the sealing film 541 is tightly bonded to the fixing ring 54 to form an effective sealing barrier. When the telescopic tube 56 is in an unstretched state, the inner wall of the bottom of one end thereof is sealed to the sealing film 541, thereby ensuring that during the blood collection process, blood will not leak out through the gap between the telescopic tube 56 and the fixing ring 54. The length of the telescopic tube 56 is designed to be able to be extended to the top of the blood collection needle 6, reducing the risk of puncture caused by the exposed needle after blood collection, and providing medical staff and patients with a safer and more convenient blood collection experience.

[0030] Specifically, the telescopic tube 56 is a corrugated telescopic tube, and the material of the telescopic tube 56 is transparent plastic.

[0031] In this embodiment, the design of the corrugated telescopic tube makes the telescopic tube 56 have good elasticity. The material of the telescopic tube 56 is medical-grade transparent plastic. This transparency allows medical staff to clearly observe the position of the blood collection needle 6 and the blood collection process, thereby more accurately controlling the blood collection operation.

[0032] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same.

Claims

1. A disposable safety blood collection needle, comprising a blood transfusion tube (1), characterized in that: A blood collecting mechanism (2) is installed at one end of the blood transfusion tube (1), and a catheter (3) is fixedly installed at the other end of the blood transfusion tube (1). The outer sleeve of the catheter (3) is provided with a needle protection assembly (5), and the needle protection assembly (5) comprises a threaded sleeve (51), a connecting seat (52), a return spring (53), a fixing ring (54), a nut (55) and a telescopic tube (56). The threaded sleeve (51) is sleeved on the outer side of the catheter (3), the connecting seat (52) is installed on one end of the threaded sleeve (51), the fixing ring (54) is threadedly connected to the other end of the threaded sleeve (51), the return spring (53) is fixedly installed between the connecting seat (52) and the fixing ring (54), the nut (55) is movably installed on one side of the fixing ring (54), and the telescopic tube (56) is sleeved on the outer side of the fixing ring (54). A blood collection needle (6) is installed at the top end of the catheter (3).

2. A disposable safety blood collection needle according to claim 1, characterized in that: The blood collection needle (6) and the threaded sleeve (51) are both located inside the telescopic tube (56), and the interior of the blood collection needle (6) and the catheter (3) are both sealed and connected to the interior of the blood transfusion tube (1).

3. The disposable safety blood collection needle according to claim 1, characterized in that: A needle handle (4) is installed on one side of the needle protection assembly (5), and the needle handle (4) is arranged in a trapezoidal shape. The needle handle (4) is sleeved and installed on the outside of the catheter (3).

4. The disposable safety blood collection needle according to claim 1, characterized in that: A sealing film (541) is bonded to the outside of the fixing ring (54), the bottom inner wall of one end of the telescopic tube (56) is sealed and fitted with the sealing film (541), and the other end of the telescopic tube (56) is telescoped to the top end of the blood collection needle (6).

5. The disposable safety blood collection needle according to claim 1, characterized in that: The telescopic tube (56) is a corrugated telescopic tube, and the material of the telescopic tube (56) is transparent plastic.

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