A blood lancet

Abstract

This utility model belongs to the field of medical supplies and provides a blood collection needle. The blood collection needle includes a needle base with an inner cavity. A matching pressure sleeve is provided inside the inner cavity. The pressure sleeve can move up and down. A needle hole is opened on the bottom surface of the pressure sleeve. A needle handle is formed with the top surface of the needle base facing downwards and is located inside the pressure sleeve. A retaining ring is provided above the needle handle. A limiting block is formed on the inner wall of the pressure sleeve above the retaining ring. A needle tip is provided on the bottom surface of the needle handle corresponding to the needle hole. A spring is provided between the pressure sleeve and the retaining ring. When using the blood collection needle to collect blood, the user holds the needle base with the grip part, aligns the needle hole on the bottom surface of the pressure sleeve with the blood collection site, and then presses the needle base slightly. The pressure sleeve moves up a small distance, further compressing the spring. The needle tip emerges from the needle hole and pierces the blood collection site to complete the blood collection operation. Finally, the blood collection needle moves away from the blood collection site. Under the elastic force of the spring, the pressure sleeve moves down, and the needle tip retracts into the pressure sleeve, achieving safe storage of the needle tip.

Description

Technical Field

[0001] This utility model belongs to the field of medical supplies, and in particular relates to a blood collection needle. Background Technology

[0002] In the field of medical testing, lancets are widely used in clinical testing, blood glucose monitoring, newborn screening, and other scenarios. Their core function is to obtain capillary blood through precise skin puncture, while minimizing pain and avoiding cross-infection.

[0003] The safety performance of blood collection needles is a core design element for avoiding iatrogenic infections and operational risks. Most existing blood collection needles use manual locking or a rear-mounted spring structure for needle retrieval. However, in practice, human negligence or structural delays often lead to prolonged needle exposure, increasing the risk of needle stick injuries to healthcare workers. For example, traditional spring-driven blood collection needles require manual pushing of the locking mechanism after puncture to complete needle retrieval, a cumbersome procedure that also results in a brief needle exposure window. Utility Model Content

[0004] In view of the above problems, the purpose of this utility model is to provide a blood collection needle that aims to solve the above problems.

[0005] The present invention adopts the following technical solution:

[0006] The blood collection needle includes a needle hub with an inner cavity. A matching pressure sleeve is provided inside the inner cavity. The pressure sleeve can move up and down. A needle hole is opened on the bottom surface of the pressure sleeve. A needle handle is formed with the top surface of the needle hub facing down. The needle handle is located inside the pressure sleeve. A retaining ring is provided above the needle handle. A limiting block is formed on the inner wall of the pressure sleeve above the retaining ring. A needle tip is provided on the bottom surface of the needle handle corresponding to the needle hole. A spring is provided between the pressure sleeve and the retaining ring.

[0007] Furthermore, a needle sleeve is formed with the bottom surface of the pressure sleeve facing upwards, and the lower part of the needle handle is located inside the needle sleeve.

[0008] Furthermore, the bottom surface of the pressure sleeve faces upward and is directly opposite the needle tip, forming a guide head.

[0009] Furthermore, both sides of the needle seat are recessed inward to form a gripping part.

[0010] Furthermore, both the needle hub and the needle handle have internal cavities, and the top of the needle handle is open.

[0011] The beneficial effects of this utility model are:

[0012] 1. After blood collection is completed, the pressure sleeve moves down and resets under the action of the spring, and the needle retracts into the needle sleeve, avoiding the needle being exposed and reducing the risk of medical staff being pricked, while also reducing the possibility of cross-infection.

[0013] 2. The guide tip design ensures the stability of the needle during puncture, reduces needle deviation, and thus reduces patient discomfort. Attached Figure Description

[0014] Figure 1 This utility model provides an overall drawing of the blood collection needle.

[0015] Figure 2 This utility model provides an integral cross-section of a blood collection needle. Figure 1 .

[0016] Figure 3 This utility model provides an integral cross-section of a blood collection needle. Figure 2 . Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model patent 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 scope of the present utility model.

[0018] To illustrate the technical solution described in this utility model, specific embodiments are described below.

[0019] For ease of explanation, only the parts relevant to the embodiments of this utility model are shown.

[0020] Combination Figure 1-3 As shown, the blood collection needle includes a needle base 1, the needle base 1 having an inner cavity 2, and a matching pressure sleeve 3 provided in the inner cavity 2. The pressure sleeve 3 can move up and down. A needle hole 4 is opened on the bottom surface of the pressure sleeve 3. A needle handle 5 is formed with the top surface of the needle base 1 facing down. The needle handle 5 is located inside the pressure sleeve 3. A retaining ring 6 is also provided above the needle handle 5. A limiting block 7 is formed on the inner wall of the pressure sleeve 3 above the retaining ring 6. A needle tip 8 is provided on the bottom surface of the needle handle 5 corresponding to the needle hole. A spring 9 is provided between the pressure sleeve 3 and the retaining ring.

[0021] In the field of medical testing, lancets are widely used in clinical testing, blood glucose monitoring, newborn screening, and other scenarios. Their core function is to obtain capillary blood through precise skin puncture, while minimizing pain and avoiding cross-infection.

[0022] The blood collection needle includes a needle base 1, with inwardly recessed grip portions 10 on both sides. When using this blood collection needle for blood collection, the user first grasps the needle base using the grip portions, aligns the needle hole on the bottom surface of the pressure sleeve with the blood collection site, and then presses the needle base slightly. During this process, the pressure sleeve moves upward a short distance, further compressing the spring. At this point, the needle tip emerges from the needle hole and pierces the blood collection site, completing the blood collection operation. Finally, as the blood collection needle moves away from the blood collection site, the pressure sleeve moves downward and resets under the elastic force of the spring, and the needle tip retracts into the pressure sleeve, achieving safe storage of the needle tip.

[0023] Before use, under the action of the spring, the limiting block and the retaining ring are always in contact. The retaining ring, through the limiting block, serves to limit the pressure sleeve.

[0024] Figure 2 In this design, the bottom surface of the pressure sleeve 3 is upward-facing, forming a needle sleeve 11, with the lower part of the needle handle 5 located inside the needle sleeve 11. The needle sleeve protects the needle tip, allowing it to be stored within the sleeve after blood collection, preventing the needle from being exposed. Simultaneously, during blood collection, the needle handle slides within the needle sleeve, which serves to limit and guide the needle handle, improving stability during blood collection.

[0025] The pressure sleeve 3 has a guide head 12 formed with its bottom surface facing upward and directly opposite the needle 8. The function of the guide head is to guide the needle to accurately pass through the needle hole during needle puncture, ensuring the stability and accuracy of needle puncture.

[0026] like Figure 2-3 Both the needle hub 1 and the needle handle 5 have cavities 13 inside, and the top of the needle handle is open. This design of the needle hub and needle handle can reduce the overall weight of the blood collection needle to a certain extent, making it lighter and more convenient to use.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A blood collection needle, characterized in that: The blood collection needle includes a needle hub with an inner cavity. A matching pressure sleeve is provided inside the inner cavity. The pressure sleeve can move up and down. A needle hole is opened on the bottom surface of the pressure sleeve. A needle handle is formed with the top surface of the needle hub facing down. The needle handle is located inside the pressure sleeve. A retaining ring is provided above the needle handle. A limiting block is formed on the inner wall of the pressure sleeve above the retaining ring. A needle tip is provided on the bottom surface of the needle handle corresponding to the needle hole. A spring is provided between the pressure sleeve and the retaining ring.

2. The blood collection needle as described in claim 1, characterized in that: The bottom surface of the pressure sleeve is facing upward to form a needle sleeve, and the lower part of the needle handle is located inside the needle sleeve.

3. The blood collection needle as described in claim 2, characterized in that: The bottom surface of the pressure sleeve faces upward and is directly opposite the needle, forming a guide.

4. The blood collection needle as described in claim 3, characterized in that: The needle hub has inward-curving sides on both sides to form a gripping part.

5. A blood collection needle as described in claim 4, characterized in that: Both the needle hub and the needle handle have internal cavities, and the top of the needle handle is open.

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