Novel disposable vein blood taking needle

Abstract

The invention discloses a novel disposable vein blood taking needle, and relates to the technical field of medical instruments, the novel disposable vein blood taking needle comprises a vein needle, the tail end of the vein needle is communicated with a blood drawing tube, the tail end of the blood drawing tube is communicated with a test tube needle, the outer side of the test tube needle is provided with a protective shell, the top end of the protective shell is fixedly connected with a top plate, and the test tube needle penetrates through the top plate; a limiting plate is fixedly connected to the outer side of the middle of the test tube needle, a reset spring is fixedly connected to the top end of the limiting plate, and the top end of the reset spring is fixedly connected with the top plate. The needle head is wrapped by the protective cover, pollution or mistaken touch puncture caused by exposure is avoided, the safety of medical staff and patients is guaranteed, the protective shell and the top plate form a closed structure, the needle head is further isolated, and the test tube needle head can be controlled to puncture the test tube sealing cover through the design of the sliding ring, the sliding block and the limiting plate; the control button is pressed down to release the clamping connection between the second clamping piece and the first clamping piece, the reset spring automatically pulls the needle out of the test tube, the next test tube is rapidly replaced, and the blood sampling efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and more particularly to a novel disposable venous blood collection needle. Background Art

[0002] Traditional venous blood collection technology relies on a blood collection needle with two through-holes to transfer blood from the vein to a negative pressure test tube. The core problem lies in the risk of needle exposure at the puncture end of the test tube and operational safety defects. The following are the main hidden dangers of existing technology:

[0003] Risk of contamination and accidental injury caused by exposed test tube needles: The blood collection needle must penetrate the test tube's sealing cap (such as a rubber stopper or plastic cap) to establish a blood pathway, and during this process, the needle is exposed to the external environment for a long time. If the operation is careless or the fixation is unstable, the needle tip can easily deviate from the target, resulting in blood spillage and contamination. If the needle does not fully penetrate the sealing cap, negative pressure suction may cause blood to splash, contaminating the operating table or the hands of medical staff. There is also the risk of secondary needle exposure. After blood collection is completed, the needle needs to be pulled out of the test tube. At this time, if there is no automatic retraction or protective device, the needle is directly exposed to the air, increasing the risk of bacterial contamination.

[0004] The tube end of a traditional lancet requires manual adjustment, often requiring the operator's hand to position the tube or adjust the angle. If the tube slips or an operator makes a mistake, the needle can easily prick a finger or hand. This is especially true for patients who require at least four or five tubes of blood for testing. Medical staff must repeatedly insert and remove the needle, and when changing multiple tubes, the operator frequently comes into contact with the exposed needle, making accidents more likely to occur due to fatigue.

[0005] Traditional designs rely on manual control of the needle's entry and exit from the test tube, lacking automated protection mechanisms. For example, after the needle is removed from the exposed window, the needle must be manually removed and discarded. This lack of physical isolation can easily injure the cleaning personnel. If the needle fails to penetrate the sealing cap on the first try, manual repositioning is required, potentially contaminating the needle tip or causing accidental injury from repeated attempts.

[0006] Therefore, it is necessary to propose a new type of disposable venous blood collection needle to solve the above problems. Summary of the Invention

[0007] (1) Technical problems solved

[0008] The purpose of the present invention is to provide a new type of disposable venous blood collection needle to solve the problem that the existing needle is directly exposed to the air, increasing the risk of bacterial contamination, and medical staff need to repeatedly insert and remove the needle, which is very easy to injure the fingers or palms.

[0009] (2) Technical solution

[0010] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0011] A novel disposable venous blood collection needle comprises a venous needle, the distal end of the venous needle is connected to a blood collection tube, the distal end of the blood collection tube is connected to a test tube needle, a protective shell is provided on the outside of the test tube needle, the top of the protective shell is fixedly connected to a top plate, the test tube needle passes through the top plate, the outer middle portion of the test tube needle is fixedly connected to a limit plate, the top of the limit plate is fixedly connected to a return spring, and the top of the return spring is fixedly connected to the top plate;

[0012] A first sliding groove is provided at the upper ends of both sides of the protective shell, and a slider is slidably connected inside the first sliding groove. One end of the slider extends into the protective shell and is fixedly connected to the limit plate, and the other end of the slider extends out of the protective shell and is fixedly connected to the sliding ring.

[0013] Furthermore, a needle shield is sleeved on the outer side of the bottom end of the test tube needle, and a test tube baffle is fixedly connected to the bottom end of the needle shield, and the test tube baffle is fixedly connected to the inner wall of the protective shell.

[0014] Furthermore, a sponge layer is bonded to the bottom of the test tube baffle.

[0015] Furthermore, both ends of the bottom of the limit plate are fixedly connected to a fixing rod, the inner bottom end of the fixing rod is fixedly connected to a first clamp, a second sliding groove is opened in the middle of both sides of the protective shell, the inner sliding connection of the second sliding groove is connected to a control button, the inner side of the control button is fixedly connected to an L-shaped connecting rod, the inner side of the end of the L-shaped connecting rod is fixedly connected to a second clamp, the second clamp is adapted to the first clamp, and the inner side of the control button is fixedly connected to the protective shell through a compression spring.

[0016] Furthermore, a first clamping mechanism is provided at the bottom end of the protective shell, and the first clamping mechanism includes grooves opened at the bottom of both sides of the protective shell, the middle of the groove is rotatably connected to a rotating shaft, the outer side of the rotating shaft is rotatably connected to a support arm, and the inner side of the end of the support arm is fixedly connected to a third clamping member, and the top end of the support arm extends into the second slide groove and is located on the inner side of the control button.

[0017] Furthermore, a torsion spring is sleeved on the outer side of the rotating shaft, one end of the torsion spring is fixedly connected to the support arm, and the other end of the torsion spring is fixedly connected to the groove.

[0018] Furthermore, a second clamping mechanism is provided at the bottom end of the protective shell, and the second clamping mechanism includes arc plates distributed in a ring array, the arc plates are fixed to the bottom of the protective shell, the outer side of the arc plates is provided with an external thread, and the outer sides of multiple arc plates are sleeved with an internal thread ring.

[0019] Furthermore, the internal thread ring is engaged with the arc plate through an external thread, and the arc plate is tilted in an "eight" shape.

[0020] (3) Beneficial effects

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. The test tube needle of the present invention is normally wrapped by the needle protective cover to avoid contamination or accidental puncture caused by exposure of the needle, thereby ensuring the safety of medical staff and patients. The protective shell and the top plate form a closed structure to further isolate the needle and reduce the risk of blood spillage.

[0023] 2. The present invention can accurately control the test tube needle to pierce the test tube sealing cover through the linkage design of the sliding ring, the slider and the limit plate, and use the negative pressure in the test tube body to achieve rapid blood drawing to avoid blood splashing. After the blood drawing is completed, press the control button to release the clamping of the second clamp and the first clamp, and the reset spring automatically pulls the needle out of the test tube, so that the next test tube body can be quickly replaced, thereby improving the blood collection efficiency.

[0024] 3. The first clamping mechanism of the present invention can automatically clamp the lower edge of the test tube sealing cover through the elastic reset design of the third clamping part and the torsion spring, preventing the test tube from shaking or falling off during the blood collection process, thereby improving operational safety. The lever principle design of the support arm allows the clamping to be easily released by pressing the control button, and the test tube can be replaced with one hand, simplifying the process. The elastic force of the torsion spring assists the support arm in resetting, reducing the force of manual intervention and reducing operational fatigue. The placement and removal of the test tube body are achieved through simple pushing and pressing actions, without the need for complex tools or additional steps, and is suitable for emergency or batch blood collection scenarios.

[0025] 4. The second clamping mechanism of the present invention adopts an annular array of arc plates and an internal threaded ring. By rotating and tightening the internal threaded ring, the arc plate is tightened inward, forming a uniform extrusion and fixation of the test tube sealing cover, which has better stability and avoids the test tube from shaking during blood drawing; the threaded screwing design of the external thread and the internal threaded ring makes the fixing force adjustable to adapt to test tube sealing covers of different thicknesses. At the same time, the rotation operation is intuitive and easy to understand, which lowers the threshold for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a first stereoscopic schematic diagram of the venous blood collection needle structure of the present invention;

[0027] Figure 2 It is a first perspective schematic diagram of the protective housing structure of the present invention;

[0028] Figure 3 is a cross-sectional schematic diagram of the protective housing structure of the present invention in a normal state;

[0029] Figure 4A cross-sectional schematic diagram of the protective housing structure of the present invention showing a needle piercing a test tube;

[0030] Figure 5 This is an exploded schematic diagram of the test tube needle clamping structure of the present invention;

[0031] Figure 6 This is a second perspective schematic diagram of the venous blood collection needle structure of the present invention;

[0032] Figure 7 This is a first perspective schematic diagram of the protective shell structure of the present invention.

[0033] Figure markings: 1. intravenous needle; 2. blood collection tube; 3. test tube needle; 4. protective shell; 5. top plate; 6. limit plate; 7. reset spring; 8. first slide groove; 9. slider; 10. sliding ring; 11. needle guard; 12. test tube baffle; 13. sponge layer; 14. fixing rod; 15. first clamping member; 16. second slide groove; 17. control button; 18. L-shaped connecting rod; 19. second clamping member; 20. compression spring; 21. first clamping mechanism; 22. groove; 23. rotating shaft; 24. supporting arm; 25. third clamping member; 26. torsion spring; 27. second clamping mechanism; 28. arc plate; 29. ​​external thread; 30. internal thread ring; 31. test tube body; 32. test tube sealing cover. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] Example 1

[0036] Please refer to Figures 1-5. A novel disposable venous blood collection needle includes a venous needle 1. The distal end of the venous needle 1 is connected to a blood collection tube 2, which is connected to a test tube needle 3. A protective housing 4 is provided on the outside of the test tube needle 3. A top plate 5 is fixedly connected to the top of the protective housing 4. The test tube needle 3 passes through the top plate 5. A limit plate 6 is fixedly connected to the outer middle portion of the test tube needle 3. A return spring 7 is fixedly connected to the top of the limit plate 6. The top of the return spring 7 is fixedly connected to the top plate 5.

[0037] A first slide groove 8 is provided on the upper ends of both sides of the protective housing 4. A slider 9 is slidably connected inside the first slide groove 8. One end of the slider 9 extends into the protective housing 4 and is fixedly connected to the limit plate 6. The other end of the slider 9 extends out of the protective housing 4 and is fixedly connected to the sliding ring 10.

[0038] The outer side of the bottom end of the test tube needle 3 is sleeved with a needle protection cover 11, the bottom end of the needle protection cover 11 is fixedly connected to a test tube baffle 12, the test tube baffle 12 is fixedly connected to the inner wall of the protective shell 4, and the bottom of the test tube baffle 12 is bonded with a sponge layer 13;

[0039] Both ends of the bottom of the limiting plate 6 are fixedly connected to a fixing rod 14, and the inner bottom end of the fixing rod 14 is fixedly connected to a first clamping member 15. A second sliding groove 16 is opened in the middle of both sides of the protective shell 4, and a control button 17 is slidably connected inside the second sliding groove 16. The inner side of the control button 17 is fixedly connected to an L-shaped connecting rod 18, and the inner side of the end of the L-shaped connecting rod 18 is fixedly connected to a second clamping member 19. The second clamping member 19 is adapted to the first clamping member 15, and the inner side of the control button 17 is fixedly connected to the protective shell 4 through a compression spring 20.

[0040] In this embodiment, when in use, the test tube body 31 is placed at the bottom of the protective shell 4 until it reaches the sponge layer 13 below the test tube baffle 12. The test tube needle 3 is normally in the needle protection cover 11. Then, by setting the limit plate 6, the first slide groove 8, the slider 9 and the sliding ring 10, the sliding ring 10 is pressed down, and the sliding ring 10 drives the slider 9 and the limit plate 6 to move, thereby driving the test tube needle 3. The test tube needle 3 extends out of the needle protection cover 11 and pierces the test tube sealing cover 32 to enter the test tube body 31. The negative pressure in the test tube body 31 is used to draw blood. The limit plate 6 simultaneously drives the fixing rod 14 and the first clamp 15 to move downward, so that the first clamp 15 is stuck. The test tube needle 3 is positioned on the second clamp 19. After the blood drawing is completed, the control button 17 is pressed. The control button 17 moves inward and drives the second clamp 19 to move inward, so that the second clamp 19 is disengaged from the first clamp 15. The test tube needle 3 is pulled out of the test tube body 31 under the action of the tension of the reset spring 7, so that the next test tube body 31 can be quickly replaced. Through the above design, the test tube needle 3 is normally in the needle protective cover 11, which has the effect of protecting and isolating the test tube needle 3. Under the action of the protective shell 4, the needle can be accurately inserted into the test tube, which not only avoids blood spillage, but also avoids the risk of puncture.

[0041] Example 2

[0042] Please refer to Figures 1-4. This embodiment is further optimized on the basis of Example 1. Specifically, a first clamping mechanism 21 is provided at the bottom end of the protective shell 4. The first clamping mechanism 21 includes grooves 22 opened at the bottom of both sides of the protective shell 4. The middle of the groove 22 is rotatably connected to a rotating shaft 23, and the outer side of the rotating shaft 23 is rotatably connected to a support arm 24. The inner side of the end of the support arm 24 is fixedly connected to a third clamping member 25. The top end of the support arm 24 extends into the second slide groove 16 and is located on the inner side of the control button 17. A torsion spring 26 is sleeved on the outer side of the rotating shaft 23. One end of the torsion spring 26 is fixedly connected to the support arm 24, and the other end of the torsion spring 26 is fixedly connected to the groove 22.

[0043] In this embodiment, the test tube sealing cover 32 of the test tube body 31 is placed inside the first clamping mechanism 21, and the test tube body 31 is pushed upward. The test tube body 31 drives the test tube sealing cover 32 to first push open the two third clamps 25. When the third clamp 25 moves outward, it drives the support arm 24 to rotate along the rotating shaft 23 and pulls the torsion spring 26 to generate a reverse elastic force, and then enters the bottom inner cavity of the protective shell 4 until the test tube sealing cover 32 is against the sponge layer 13 at the bottom of the test tube baffle 12. Then, the support arm 24 drives the third clamp 25 to reset under the action of the elastic force of the torsion spring 26, and the third clamp 25 is stuck. The lower edge of the test tube sealing cover 32 is fixed to the test tube body 31, which is convenient and quick. When removing the test tube body 31, it is only necessary to press the control button 17, the control button 17 moves inward, and the top of the support arm 24 is pressed. By utilizing the lever principle, the third clamping member 25 at the bottom end of the support arm 24 moves outward, and the test tube sealing cover 32 is loosened to remove the test tube body 31. When the control button 17 moves inward, the second clamping member 19 is also driven to move inward, so that the second clamping member 19 is disengaged from the first clamping member 15, and the test tube needle 3 is pulled out of the test tube body 31, thereby achieving the effect of quickly replacing the next test tube body 31.

[0044] Example 3

[0045] Please refer to Figures 6 and 7. This embodiment is optimized as follows based on Example 1. Specifically, a second clamping mechanism 27 is provided at the bottom end of the protective shell 4. The second clamping mechanism 27 includes arc plates 28 distributed in a ring array. The arc plates 28 are fixed to the bottom of the protective shell 4. External threads 29 are provided on the outer sides of the arc plates 28. An internal thread ring 30 is sleeved on the outer sides of the multiple arc plates 28. The internal thread ring 30 is engaged with the arc plates 28 through the external threads 29, and the arc plates 28 are tilted in an "eight" shape.

[0046] In this embodiment, the first clamping mechanism 21 is replaced by the second clamping mechanism 27, and the test tube sealing cover 32 of the test tube body 31 is placed on the inner side of the second clamping mechanism 27, that is, between multiple arc plates 28, and then the internal threaded ring 30 is rotated and screwed. The internal threaded ring 30 moves downward and drives the arc plates 28 to tighten inward, thereby fixing the test tube sealing cover 32.

[0047] In summary, in the present invention, the test tube needle 3 is normally wrapped by the needle shield 11 to prevent the needle from being exposed and causing contamination or accidental puncture, thereby ensuring the safety of medical staff and patients. The protective shell 4 and the top plate 5 form a closed structure, further isolating the needle and reducing the risk of blood spillage.

[0048] Through the linkage design of the sliding ring 10, the slider 9 and the limit plate 6, the test tube needle 3 can be accurately controlled to pierce the test tube sealing cover 32, and the negative pressure in the test tube body 31 is used to quickly draw blood to avoid blood splashing. After the blood drawing is completed, the control button 17 is pressed to release the clamping of the second clamping member 19 and the first clamping member 15, and the reset spring 7 automatically pulls the needle out of the test tube, so that the next test tube body 31 can be quickly replaced, thereby improving the blood collection efficiency;

[0049] The first clamping mechanism 21 can automatically clamp the lower edge of the test tube sealing cover 32 through the elastic reset design of the third clamping member 25 and the torsion spring 26, preventing the test tube from shaking or falling off during the blood collection process, thereby improving operational safety. The lever principle design of the support arm 24 allows the clamping to be easily released by pressing the control button 17, and the test tube can be replaced with one hand, simplifying the process. The elastic force of the torsion spring 26 assists the support arm 24 in resetting, reducing manual intervention and operator fatigue. The placement and removal of the test tube body 31 are both achieved by simple pushing and pressing actions, without the need for complex tools or additional steps, and are suitable for emergency or batch blood collection scenarios;

[0050] The second clamping mechanism 27 adopts an annular array of arc plates 28 to cooperate with the internal thread ring 30. By rotating and tightening the internal thread ring 30, the arc plates 28 are tightened inward, forming a uniform squeezing and fixing of the test tube sealing cover 32, which has better stability and avoids the test tube from shaking during blood drawing; the threaded engagement design of the external thread 29 and the internal thread ring 30 makes the fixing force adjustable to adapt to test tube sealing covers 32 of different thicknesses. At the same time, the rotation operation is intuitive and easy to understand, which reduces the threshold for use.

[0051] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention should also be included in the scope of protection of the present invention.

Claims

1. A novel disposable venous blood collection needle, comprising a venous needle (1), characterized in that: The end of the venous needle (1) is connected to a blood draw tube (2), and the end of the blood draw tube (2) is connected to a test tube needle (3). A protective shell (4) is provided on the outside of the test tube needle (3), and the top of the protective shell (4) is fixedly connected to a top plate (5). The test tube needle (3) passes through the top plate (5). The middle outer side of the test tube needle (3) is fixedly connected to a limit plate (6), and the top of the limit plate (6) is fixedly connected to a return spring (7). The top of the return spring (7) is fixedly connected to the top plate (5). A first slide groove (8) is provided at the upper ends of both sides of the protective shell (4), and a slider (9) is slidably connected inside the first slide groove (8). One end of the slider (9) extends into the protective shell (4) and is fixedly connected to the limit plate (6), and the other end of the slider (9) extends out of the protective shell (4) and is fixedly connected to the sliding ring (10).

2. A novel disposable venous blood collection needle according to claim 1, characterized in that: The outer side of the bottom end of the test tube needle (3) is sleeved with a needle protection cover (11), the bottom end of the needle protection cover (11) is fixedly connected to a test tube baffle (12), and the test tube baffle (12) is fixedly connected to the inner wall of the protective shell (4).

3. The novel disposable venous blood collection needle according to claim 2, characterized in that: A sponge layer (13) is bonded to the bottom of the test tube baffle (12).

4. The novel disposable venous blood collection needle according to claim 2, characterized in that: Both ends of the bottom of the limit plate (6) are fixedly connected to a fixing rod (14), the inner bottom end of the fixing rod (14) is fixedly connected to a first clamping member (15), and the middle of both sides of the protective shell (4) are provided with a second sliding groove (16), the interior of the second sliding groove (16) is slidably connected to a control button (17), the inner side of the control button (17) is fixedly connected to an L-shaped connecting rod (18), the inner side of the end of the L-shaped connecting rod (18) is fixedly connected to a second clamping member (19), the second clamping member (19) is adapted to the first clamping member (15), and the inner side of the control button (17) is fixedly connected to the protective shell (4) via a compression spring (20).

5. The novel disposable venous blood collection needle according to claim 1, characterized in that: The bottom end of the protective shell (4) is provided with a first clamping mechanism (21), which includes grooves (22) opened at the bottom of both sides of the protective shell (4), a rotating shaft (23) is rotatably connected to the middle of the groove (22), and a support arm (24) is rotatably connected to the outer side of the rotating shaft (23), and a third clamping member (25) is fixedly connected to the inner side of the end of the support arm (24), and the top end of the support arm (24) extends into the second sliding groove (16) and is located on the inner side of the control button (17).

6. The novel disposable venous blood collection needle according to claim 5, characterized in that: A torsion spring (26) is sleeved on the outer side of the rotating shaft (23), one end of the torsion spring (26) is fixedly connected to the support arm (24), and the other end of the torsion spring (26) is fixedly connected to the groove (22).

7. The novel disposable venous blood collection needle according to claim 1, characterized in that: A second clamping mechanism (27) is provided at the bottom end of the protective shell (4), and the second clamping mechanism (27) includes arc-shaped plates (28) distributed in a ring array. The arc-shaped plates (28) are fixed to the bottom of the protective shell (4), and the outer side of the arc-shaped plates (28) is provided with an external thread (29). The outer sides of the plurality of arc-shaped plates (28) are sleeved with an internal thread ring (30).

8. The novel disposable venous blood collection needle according to claim 7, characterized in that: The internal thread ring (30) is meshed and connected to the arc plate (28) via the external thread (29), and the arc plate (28) is tilted in an "eight" shape.

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