Blood taking needle with anti-needle stick injury

Abstract

The application discloses a blood taking needle capable of preventing needle stick injury, which comprises a needle head shell, a blood taking needle head arranged on the inner bottom surface of the needle head shell and exposed outside the needle head shell, a protection device, a trigger device and a locking device. The protection device comprises a protection cover which is slidably connected to the outer side surface of the blood taking needle head, and an elastic element is arranged between the protection cover and the inner bottom surface of the needle head shell. The trigger device is movably arranged on the outer side surface of the needle head shell and connected with the protection cover. The locking device is arranged on the outer side surface of the protection cover and is clamped with the needle head shell. In application, the spring pushes the protection cover to completely cover the needle tip, and the clamping arm is clamped into the limiting hole to be fixed. When blood is taken, the button is pressed, the trigger device is unlocked, the protection cover is retracted to expose the needle head, the button is released after blood is taken, the spring pushes the protection cover to cover the needle tip again, the clamping arm is locked again, and permanent protection is realized.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a blood collection needle for preventing needlestick injuries. Background Technology

[0002] Traditional venous blood collection needles are among the most commonly used medical devices in clinical diagnosis and treatment. The occupational exposure risks posed by their structural design flaws have become a significant issue in global medical safety. The open design of traditional blood collection needles is the root cause of these safety hazards. After puncture, the metal needle tip remains exposed to an open environment, making it particularly vulnerable to secondary needle stick injuries, especially when handling multiple-tube blood collection.

[0003] Although there are some needle-proof blood collection needle designs on the market, they still have problems such as complex structure, inconvenient operation, or poor protective effect. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a blood collection needle that prevents needlestick injuries.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A needlestick-proof blood collection needle, including

[0007] A needle housing with a blood collection needle disposed on its inner bottom surface, the blood collection needle being exposed outside the needle housing;

[0008] The protective device includes a protective cover that is slidably connected to the outer surface of the blood collection needle, and an elastic element is provided between the protective cover and the inner bottom surface of the needle housing;

[0009] The triggering device is movably disposed on the outer side of the needle housing and connected to the protective cover; and

[0010] A locking device is provided on the outer surface of the protective cover and engages with the needle housing.

[0011] Furthermore, the triggering device includes a button, a support rod is provided below the button, a rotating rod is rotatably connected to the end of the support rod, and the end of the rotating rod away from the button abuts against the protective cover.

[0012] Furthermore, the outer surface of the protective cover is provided with positioning holes that are adapted to the rotating rod.

[0013] Furthermore, the rotating rod includes a rotating part and a limiting part located at one end of the rotating part and extending toward the protective cover. The rotating part is pivotally connected to the support rod, and the limiting part is inserted into the positioning hole.

[0014] Furthermore, the locking device includes a resilient latching arm located at the bottom of the protective cover, the end of which is a barb structure.

[0015] Furthermore, the outer side of the needle housing is provided with a limiting hole that is adapted to the buckle arm.

[0016] Furthermore, the outer side of the needle housing is provided with a guide groove that is adapted to the buckle arm, and the guide groove is connected to the limiting hole.

[0017] Furthermore, the protective cover has a cover head at one end and a baffle extending inward along its radial direction on the inner sidewall of the other end. The protective cover has a needle hole adapted to the blood collection needle along its central axis.

[0018] Furthermore, the two ends of the elastic element abut against the baffle and the needle housing, respectively.

[0019] Furthermore, the needle housing has a perforation, the tail end of the blood collection needle is fixedly installed in the perforation, and the tail end of the blood collection needle is connected to a catheter.

[0020] The beneficial effects of this utility model are:

[0021] 1. The present invention proposes a needle to prevent needlestick injuries. After blood collection, the protective cover automatically covers and locks the needle tip, completely avoiding needle tip exposure and simplifying the operation process. The single-button design of the trigger device allows medical staff to complete the needle exposure and retraction simply by pressing, reducing operation steps and improving blood collection efficiency. The needle shell integrates all functional components, is compact, and easy to operate by hand.

[0022] 2. This utility model proposes a needlestick-proof blood collection needle. By designing a triggering device and utilizing the lever principle, the force of vertically pressing the button is converted into the displacement of a rotating rod, reducing the operating force. Unlocking requires only a light press, making it particularly suitable for medical scenarios involving prolonged, repetitive operations. The vertical movement of the support rod and the rotation angle of the rotating rod are precisely designed to ensure a rapid response when the protective cover unlocks, avoiding jamming or delay.

[0023] 3. This utility model proposes a needlestick-proof blood collection needle. Through the design of a locking device, once the barb of the latching arm engages with the limiting hole, it cannot be pulled out by a reverse force because the deformation direction of the elastic arm is opposite to the unlocking direction, ensuring the protective cover is permanently locked. A "click" sound is emitted when the latching arm slides into the limiting hole, providing auditory confirmation and helping medical personnel determine whether the protection is activated. The interference fit design between the barb and the limiting hole prevents accidental disengagement even during transportation or use due to vibration.

[0024] 4. The present invention proposes a needle-proof blood collection needle. By setting a guide groove, the guide groove restricts the movement trajectory of the buckle arm, avoids the protective cover from deviating when sliding, and ensures that the barb is accurately aligned with the limiting hole. The inner wall of the guide groove is smooth and has an inclined surface, which reduces the resistance when the buckle arm slides and extends the life of the elastic arm. The connection design between the end of the guide groove and the limiting hole allows the buckle arm to automatically spring into the locking position after the protective cover is in place, shortening the locking time.

[0025] 5. The present invention proposes a needle-proof blood collection needle. By setting a protective cover, the circular cover head completely covers the needle tip, avoiding side or oblique exposure. Even if placed at an angle, it will not puncture the protective cover. The diameter of the needle hole is slightly larger than that of the needle tip, reducing friction when the protective cover moves. At the same time, the baffle and spring work together to provide uniform thrust. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is one of the schematic diagrams of a needlestick-proof blood collection needle according to the present invention;

[0028] Figure 2 This is the second schematic diagram of a needlestick-proof blood collection needle according to the present invention;

[0029] Figure 3 This is one of the cross-sectional views of a needlestick-proof blood collection needle according to this utility model;

[0030] Figure 4 This is a second cross-sectional view of a needlestick-proof blood collection needle according to the present invention;

[0031] In the figure, 10 is the needle housing; 101 is the limiting hole; 102 is the guide groove; 20 is the blood collection needle; 30 is the protective cover; 301 is the positioning hole; 302 is the buckle arm; 303 is the baffle; 304 is the needle hole; 40 is the triggering device; 401 is the button; 402 is the support rod; 403 is the rotating rod; and 50 is the elastic element. Detailed Implementation

[0032] The following is combined with Figure 1-4 This utility model will be described in detail.

[0033] A needlestick-proof blood collection needle, such as Figure 1-2 As shown, including

[0034] The needle housing 10 has a blood collection needle 20 disposed on its inner bottom surface, and the blood collection needle 20 is exposed outside the needle housing 10.

[0035] The protective device includes a protective cover 30 that is slidably connected to the outer surface of the blood collection needle 20, and an elastic element 50 is provided between the protective cover 30 and the inner bottom surface of the needle housing 10.

[0036] Triggering device 40, movably disposed on the outer side of needle housing 10 and connected to protective cover 30; and

[0037] The locking device is located on the outer surface of the protective cover 30 and engages with the needle housing 10.

[0038] The needle housing 10 is a hollow cylinder with a blood collection needle 20 fixed to its inner bottom surface. The needle tip passes through a perforation at the bottom of the housing and connects to a catheter for blood transfer. A protective cover 30 is fitted over the outside of the blood collection needle 20 and can slide along the needle. The elastic element 50 is a compression spring, with its two ends abutting against the inner baffle 303 of the protective cover 30 and the inner bottom surface of the needle housing 10, respectively. Under normal conditions, it pushes the protective cover 30 out of the housing, completely covering the needle tip. Pressing the button 401 causes the support rod 402 to disengage the limiting part of the rotating rod 403 from the protective cover 30, thus releasing the lock.

[0039] The bottom of the protective cover 30 is provided with a flexible buckle arm 302, the end of which has a barb that engages with the limiting hole 101 on the side of the housing to lock and prevent the protective cover 30 from retracting.

[0040] When not in use, the spring pushes the protective cover 30 to completely cover the needle tip, and the latching arm 302 is locked into the limiting hole 101. When collecting blood, the button 401 is pressed, the triggering device 40 is unlocked, and the protective cover 30 retracts to expose the needle. After collecting blood, the button 401 is released, the spring pushes the protective cover 30 to cover the needle tip again, and the latching arm 302 is locked again, achieving permanent protection.

[0041] In this embodiment, as Figure 4 As shown, the triggering device 40 includes a button 401, a support rod 402 is disposed below the button 401, and a rotating rod 403 is rotatably connected to the end of the support rod 402. The end of the rotating rod 403 away from the button 401 abuts against the protective cover 30. Further, the outer surface of the protective cover 30 is provided with a positioning hole 301 adapted to the rotating rod 403. Further, the rotating rod 403 includes a rotating part and a limiting part located at one end of the rotating part and extending towards the protective cover 30. The rotating part is pivotally connected to the support rod 402, and the limiting part is inserted into the positioning hole 301.

[0042] The vertical pressure is converted into horizontal displacement of the rotating rod 403 using the lever principle, reducing the operating force and ensuring sensitive triggering. The button 401 is located on the side of the needle housing 10, and the support rod 402, made of metal or high-strength plastic, is vertically connected below the button 401 and moves downwards when pressed. The rotating rod 403 is connected to the end of the support rod 402 via a pivot and consists of a rotating part and a limiting part. When the button 401 is pressed, the rotating rod 403 rotates around the pivot, disengaging the limiting part from the positioning hole 301 of the protective cover 30, releasing the sliding of the protective cover 30. A spring can also be provided between the end of the rotating rod 403 with the limiting part and the needle housing 10 to ensure that the limiting part is stably inserted into the positioning hole 301.

[0043] In this embodiment, as Figure 3 As shown, the locking device includes a flexible latching arm 302 located at the bottom of the protective cover 30, with a barb at the end. Further, the outer surface of the needle housing 10 is provided with a limiting hole 101 adapted to the latching arm 302. Further, the outer surface of the needle housing 10 is provided with a guide groove 102 adapted to the latching arm 302, and the guide groove 102 communicates with the limiting hole 101.

[0044] As the protective cover 30 slides, the latching arm 302 moves along the guide groove 102 until the barb engages with the limiting hole 101, emitting a "click" sound to indicate that the locking is complete. The deformation of the elastic arm provides reverse resistance to prevent accidental disengagement.

[0045] The guide groove 102 is an elongated groove, the width of which matches the buckle arm 302, and the length which covers the entire sliding range of the protective cover 30. Its end communicates with the limiting hole 101, and the groove has an inclined surface to guide the barb to slide into the limiting hole 101 and automatically lock. This ensures that the protective cover 30 slides along a fixed path, preventing displacement that could cause the buckle arm 302 to misalign, and improving locking reliability.

[0046] In this embodiment, the protective cover 30 has a cover head at one end and a baffle 303 extending inward along its radial direction on the inner sidewall of the other end. The protective cover 30 has a needle hole 304 adapted to the blood collection needle 20 along its central axis.

[0047] The front end of the cover has a semi-circular structure that can completely cover the needle tip. It is made of transparent plastic for easy observation. The radially extending annular flange on the inner wall of the baffle 303 abuts against the top of the spring to transmit uniform thrust. The needle hole 304 is located at the center of the protective cover 30 and its diameter is slightly larger than that of the blood collection needle 20 to ensure smooth sliding and no friction against the needle.

[0048] In this embodiment, the elastic element 50 abuts against the baffle 303 and the needle housing 10 at both ends. The spring is sleeved on the outside of the blood collection needle 20, and its two ends are fixed to the baffle 303 and the inner bottom surface of the housing, respectively. It stores elastic force in the compressed state and pushes the protective cover 30 to quickly cover the needle tip when released.

[0049] In this embodiment, the needle housing 10 has a perforation, and the tail end of the blood collection needle 20 is fixedly installed in the perforation. A catheter is connected to the tail end of the blood collection needle 20. The perforation is located at the center of the bottom of the housing, and the tail end of the blood collection needle 20 is fixed in the perforation with epoxy resin to ensure a tight seal. The catheter is a soft PVC tube, connected to the tail end of the needle, and the other end is connected to a vacuum blood collection tube or infusion device.

[0050] In use, pressing button 401 causes the support rod 402 to move downwards, causing the rotating part of the rotating rod 403 to rotate around the pivot, disengaging the limiting part from the protective cover 30. The spring releases its elasticity, pushing the protective cover 30 towards the needle tip until the locking arm 302 slides into the limiting hole 101 along the guide groove 102 and locks in place, completely enclosing the needle tip. After blood collection, releasing button 401 prevents the protective cover 30 from retracting due to the locking arm 302, ensuring permanent protection of the needle tip.

[0051] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A needle for preventing needlestick injuries during blood collection, characterized in that, include A needle housing with a blood collection needle disposed on its inner bottom surface, the blood collection needle being exposed outside the needle housing; The protective device includes a protective cover that is slidably connected to the outer surface of the blood collection needle, and an elastic element is provided between the protective cover and the inner bottom surface of the needle housing; The triggering device is movably disposed on the outer side of the needle housing and connected to the protective cover; and A locking device is provided on the outer surface of the protective cover and engages with the needle housing.

2. The needlestick-proof blood collection needle as described in claim 1, characterized in that, The triggering device includes a button, and a support rod is provided below the button. A rotating rod is rotatably connected to the end of the support rod, and the end of the rotating rod away from the button abuts against the protective cover.

3. The needlestick-proof blood collection needle as described in claim 2, characterized in that, The outer surface of the protective cover is provided with positioning holes that are adapted to the rotating rod.

4. The needlestick-proof blood collection needle as described in claim 3, characterized in that, The rotating rod includes a rotating part and a limiting part located at one end of the rotating part and extending toward the protective cover. The rotating part is pivotally connected to the support rod, and the limiting part is inserted into the positioning hole.

5. A needlestick-proof blood collection needle as described in claim 1, characterized in that, The locking device includes a flexible latching arm located at the bottom of the protective cover, the end of which is a barb structure.

6. A needlestick-proof blood collection needle as described in claim 5, characterized in that, The outer side of the needle housing is provided with a limiting hole that is adapted to the buckle arm.

7. A needlestick-proof blood collection needle as described in claim 6, characterized in that, The outer side of the needle housing is provided with a guide groove that is adapted to the buckle arm, and the guide groove is connected to the limiting hole.

8. A needlestick-proof blood collection needle as described in claim 1, characterized in that, The protective cover has a cover head at one end and a baffle extending inward along its radial direction on the inner sidewall of the other end. The protective cover has a needle hole along its central axis to accommodate the blood collection needle.

9. A needlestick-proof blood collection needle as described in claim 8, characterized in that, The two ends of the elastic element abut against the baffle and the needle housing, respectively.

10. A needlestick-proof blood collection needle as described in claim 1, characterized in that, The needle housing has a perforation, the tail end of the blood collection needle is fixedly installed in the perforation, and the tail end of the blood collection needle is connected to a catheter.

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