Mosquito-like blood sampling unmanned aerial vehicle with infrared sensing blood vessel function

Abstract

The present application relates to mosquito-like blood sampling unmanned plane technical field, especially mosquito-like blood sampling unmanned plane with infrared induction blood vessel function, including unmanned plane main part, the bottom edge of unmanned plane main part is fixedly connected with a plurality of supporting claws, the lower surface of supporting claw is fixedly provided with a hair sticking device, the bottom of unmanned plane main part is fixedly connected and is provided with a mounting bracket, the mounting bracket is rotatably connected and is provided with an adjusting bracket, the adjusting bracket below is provided with a fixing cover, the fixing cover is rotatably connected and is provided with a blood sampling seat, through setting hair combing mechanism on unmanned plane main part, the hair of blood sampling site can be combed to both sides when blood sampling is carried out, the hair of blood sampling site can be effectively removed, so that the infrared sensor simulation mosquito can more accurately perceive the temperature difference of blood vessel, help positioning blood vessel, reduce the difficulty of blood vessel positioning due to hair shielding, avoid the deviation of needle or puncture failure caused by the resistance of hair.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of mosquito-like blood sampling drones, and in particular to a mosquito-like blood sampling drone with infrared-induced blood vessel function. BACKGROUND

[0002] The mosquito-like blood sampling drone with infrared-induced blood vessel function is an innovative drone simulating the blood sampling process of mosquitoes, aiming to realize accurate and painless blood collection of animals. The drone combines infrared induction technology, miniaturized puncture equipment, automatic flight control and intelligent data analysis system, can simulate the blood-sucking behavior of mosquitoes, and collect animal blood in an efficient, painless and accurate manner, and is widely used in medical research, animal health monitoring and veterinary diagnosis and other fields.

[0003] In the prior art, when collecting blood from animals, there are a large number of hairs on the surface of the animal. Since the prior art is not convenient to push the hairs apart when collecting blood, the hair layer increases the puncture resistance, especially when penetrating the skin, the hairs may hinder the accurate entry of the blood-sucking needle into the target blood vessel. At this time, the drone may need greater puncture force, which will increase the discomfort of the animal or cause the needle to deviate from the target. The hairs may reduce the stability of the blood-sucking needle, increase the uncertainty in the puncture process, cause the puncture process to be not smooth, and thus affect the blood collection effect.

[0004] In summary, in the prior art, there is a lack of technology for the mosquito-like blood sampling drone to push the hairs apart when collecting blood from animals. SUMMARY

[0005] The application aims to solve the problems in the background art and provides a mosquito-like blood sampling drone with infrared-induced blood vessel function.

[0006] To achieve the above purpose, the application adopts the following technical scheme: a mosquito-like blood sampling drone with infrared-induced blood vessel function, comprising a drone main body, a plurality of supporting claws are fixedly connected to the bottom edge of the drone main body, a hair sticking device is fixedly arranged on the lower surface of the supporting claw, an installation rack is fixedly connected and arranged at the bottom of the drone main body, an adjusting rack is rotatably connected and arranged on the installation rack, a fixing cover is arranged below the adjusting rack, a blood sampling seat is rotatably connected and arranged in the fixing cover, a hair combing mechanism is slidably connected and arranged on one side of the bottom end of the fixing cover, and a transmission disinfection mechanism is slidably connected and arranged on the bottom end of the fixing cover.

[0007] Preferably, an electric push rod A is fixedly connected and arranged on the installation rack, and an adjusting rack is fixedly connected and arranged at the output end of the electric push rod A.

[0008] Preferably, an adjusting wheel is fixedly connected to the adjusting frame, the adjusting wheel is meshed with an adjusting rack for transmission, and an electric push rod B is fixedly connected through the adjusting frame, with the other end of the electric push rod B fixedly connected to a fixed cover.

[0009] Preferably, the fixed cover has an outlet on one side, and the outlet is threadedly connected to a cover. An electric push rod C is fixedly connected through the other side of the fixed cover, and a compression plug is fixedly connected to one end of the electric push rod C inside the fixed cover.

[0010] Preferably, the bottom surface of the fixed cover has two symmetrical grooves, the inner wall of the bottom end of the fixed cover has a liquid storage tank, a liquid addition pipe is fixedly connected through the liquid storage tank, a blood collection port is provided on one side of the bottom end of the fixed cover, and an infrared sensor is fixedly installed on one side of the bottom end of the fixed cover.

[0011] Preferably, the blood collection seat has multiple placement slots in a ring structure, and a negative pressure blood collection needle is placed in the placement slot. The top of the negative pressure blood collection needle is in movable contact with the bottom surface of the squeeze plug. A motor is fixedly connected to the inner wall of the middle part of the blood collection seat, and the motor is fixedly connected to the inner wall of the fixed cover.

[0012] Preferably, a needle holder is slidably fitted inside the placement groove. The needle holder is adapted to the negative pressure blood collection needle. Springs are fixedly connected to both ends of the needle holder, and the other end of the spring is fixedly connected to the inner wall of the placement groove.

[0013] Preferably, the hair combing mechanism includes two symmetrically arranged hair combs. A sliding frame is rotatably connected to each hair comb. The top end of the sliding frame is slidably engaged with the inner wall of the groove. A slanted groove rod is fixedly connected to one side of the sliding frame. A worm gear is rotatably connected to one end of the sliding frame. A transmission wheel is fixedly connected to one end of the worm gear. A fixed rack is engaged with one side of the transmission wheel. The fixed rack is fixedly connected to the inner wall of the fixed cover. A worm wheel is fixedly connected to one end of the hair comb. The worm wheel engages with the worm gear for transmission.

[0014] Preferably, the transmission disinfection mechanism includes a slide, one end of which is fixedly connected to a hydraulic rod, the other end of which is fixedly connected to the inner wall of the bottom of the fixed cover, both sides of which are fixedly connected to L-shaped transmission rods, the other ends of which are slidably engaged with the inner wall of the inclined groove rod, a spray pipe is fixedly connected through the slide, one end of which is fixedly connected to multiple nozzles, and the inner wall of the other end of which is slidably engaged with a liquid guide pipe, which is fixedly connected through the inner wall of the liquid storage tank.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. By setting a hair-combing mechanism on the main body of the drone, the hair at the blood collection site can be combed to both sides when collecting blood from animals. This effectively removes the hair at the blood collection site, allowing the infrared sensor to more accurately detect the temperature difference in the blood vessels, which helps to locate the blood vessels and reduces the difficulty in locating blood vessels due to hair obstruction. After combing the hair, the surface of the blood vessels is clearly visible, allowing the drone to more accurately find the location of the blood vessels, thereby improving the accuracy of blood collection. By combing the hair, the puncture needle can more smoothly contact the skin and accurately enter the blood vessel. The hair pushing makes the needle penetration path smoother, avoiding the resistance of the hair that may cause the needle to deviate or fail to puncture.

[0017] 2. By setting up a transmission disinfection mechanism, while driving the spray pipe to move and disinfect the blood collection point, it can also drive the hair combing mechanism to comb the hair. This not only completes the disinfection of the blood collection point, but also drives the hair combing mechanism to comb the hair, reducing extra operation steps. It can ensure that the disinfectant directly contacts the skin surface, avoid hair obstruction, and improve the disinfection effect. This not only improves work efficiency, but also ensures the safety and painlessness of the operation.

[0018] 3. By setting a rotatable blood collection seat, multiple negative pressure blood collection needles can be switched. Different blood collection needles can be used simultaneously in the same operation, thereby improving the overall efficiency of blood collection, especially when different types of blood samples need to be collected. At the same time, by setting an adjustment frame, the blood collection angle can be adjusted according to the blood collection site and the animal's body size to ensure accurate and comfortable blood collection. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a mosquito-like blood collection drone with infrared blood vessel sensing function according to the present invention.

[0020] Figure 2 This is a partial cross-sectional view of the overall structure of a mosquito-like blood collection drone with infrared blood vessel sensing function according to the present invention.

[0021] Figure 3 This is a schematic diagram of the mounting frame structure of a mosquito-like blood collection drone with infrared blood vessel sensing function according to the present invention.

[0022] Figure 4 This is a schematic diagram of the adjustment frame structure of a mosquito-like blood collection drone with infrared blood vessel sensing function according to the present invention;

[0023] Figure 5 This is a cross-sectional schematic diagram of the fixed cover structure of a mosquito-like blood collection drone with infrared blood vessel sensing function according to the present invention.

[0024] Figure 6This is a partial cross-sectional view of the blood collection seat structure of a mosquito-like blood collection drone with infrared blood vessel sensing function according to the present invention.

[0025] Figure 7 This is a schematic diagram of the hair combing mechanism of a mosquito-like blood collection drone with infrared blood vessel sensing function according to the present invention.

[0026] Figure 8 This is a schematic diagram showing the transmission and disinfection mechanism of a mosquito-like blood collection drone with infrared blood vessel sensing function according to the present invention.

[0027] The diagram shows: 1. UAV body; 2. Mounting frame; 3. Adjustment frame; 4. Fixing cover; 5. Blood collection seat; 6. Hair combing mechanism; 7. Transmission and disinfection mechanism; 201. Electric push rod A; 202. Adjusting rack; 301. Adjusting wheel; 302. Electric push rod B; 401. Extraction port; 402. Cover; 403. Electric push rod C; 404. Squeezing plug; 405. Slide groove; 406. Liquid storage tank; 407. Liquid filling pipe; 408. Blood collection port; 409. Red... External sensor; 501, placement slot; 502, negative pressure blood collection needle; 503, motor; 504, needle holder; 505, spring; 601, hair comb; 602, sliding frame; 603, inclined groove rod; 604, worm gear; 605, transmission wheel; 606, fixed rack; 607, worm wheel; 701, slide; 702, hydraulic rod; 703, L-shaped transmission rod; 704, spray pipe; 705, nozzle; 706, guide pipe; 8, support claw; 9, lint roller. Detailed Implementation

[0028] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0029] like Figures 1-8 The mosquito-like blood collection drone shown includes a drone body 1. Several support claws 8 are fixedly connected to the bottom edge of the drone body 1. A lint roller 9 is fixedly installed on the lower surface of the support claws 8. The support claws 8 play a role in improving the stability of the drone when it lands on the animal surface. The lint roller 9 can increase the friction when in contact with the fur surface, thus playing a role in preventing slippage. A mounting frame 2 is fixedly connected to the bottom of the drone body 1. An adjustment frame 3 is rotatably connected to the mounting frame 2. A fixed cover 4 is installed below the adjustment frame 3. A blood collection seat 5 is rotatably connected inside the fixed cover 4. A hair combing mechanism 6 is slidably fitted on one side of the bottom end of the fixed cover 4. A transmission disinfection mechanism 7 is slidably fitted on the bottom end of the fixed cover 4.

[0030] like Figure 3As shown, an electric actuator A201 is fixedly connected to the mounting bracket 2, and an adjusting rack 202 is fixedly connected to the output end of the electric actuator A201. The adjusting rack 202 adjusts the angle of the adjusting bracket 3. The electric actuator A201 drives the connected adjusting rack 202 to move, so that the adjusting rack 202 can drive the adjusting bracket 3 connected to the adjusting wheel 301 to rotate to a suitable angle. Then, the electric actuator B302 drives the fixed cover 4 to move.

[0031] like Figure 4 As shown, an adjusting wheel 301 is fixedly connected to the adjusting frame 3. The adjusting wheel 301 is meshed with the adjusting rack 202 for transmission. An electric push rod B302 is fixedly connected through the adjusting frame 3. The other end of the electric push rod B302 is fixedly connected to the fixed cover 4.

[0032] like Figure 5 As shown, a retrieval port 401 is provided on one side of the fixed cover 4, and a cover 402 is threadedly connected to the retrieval port 401. An electric push rod C403 is fixedly connected through the fixed cover 4 on the other side, and a squeeze plug 404 is fixedly connected to one end of the electric push rod C403 inside the fixed cover 4. The cover 402 facilitates the placement and removal of the negative pressure blood collection needle 502.

[0033] The bottom surface of the fixed cover 4 has two symmetrically arranged grooves 405. A liquid storage tank 406 is formed on the inner wall of the bottom end of the fixed cover 4. A liquid inlet pipe 407 is fixedly connected and runs through the liquid storage tank 406. A blood collection port 408 is formed on one side of the bottom end of the fixed cover 4. An infrared sensor 409 is fixedly installed on one side of the bottom end of the fixed cover 4. Iodine tincture is placed in the liquid storage tank 406. The infrared sensor 409 is a FLIR Lepton 3.5 model, which has high-resolution thermal imaging capabilities and is suitable for low-power, compact applications. It can detect the thermal radiation emitted by the human body, thereby identifying temperature differences in blood vessels for precise positioning.

[0034] like Figure 6 As shown, the blood collection seat 5 has a ring structure with multiple placement slots 501. Negative pressure blood collection needles 502 are placed in the placement slots 501. The top of the negative pressure blood collection needle 502 is in contact with the bottom surface of the squeeze plug 404. A motor 503 is fixedly connected to the inner wall of the middle part of the blood collection seat 5. The motor 503 is fixedly connected to the inner wall of the fixed cover 4.

[0035] A needle holder 504 is slidably fitted within the placement groove 501. The needle holder 504 is adapted to the negative pressure blood collection needle 502. Springs 505 are fixedly connected to both ends of the needle holder 504, and the other end of each spring 505 is fixedly connected to the inner wall of the placement groove 501. The springs 505 automatically reset the negative pressure blood collection needle 502. A motor 503 drives the connected blood collection seat 5 to rotate, aligning one of the negative pressure blood collection needles 502 with the blood collection port 408. Then, an electric actuator C403 moves the connected compression plug 404, causing it to compress the negative pressure blood collection needle 502, thus allowing the needle tip to be inserted into the animal's blood vessel.

[0036] like Figure 7 As shown, the hair combing mechanism 6 includes two symmetrically arranged hair combs 601. A sliding frame 602 is rotatably connected to each hair comb 601. The top of the sliding frame 602 is slidably engaged with the inner wall of the groove 405. A slanted groove rod 603 is fixedly connected to one side of the sliding frame 602. A worm gear 604 is rotatably connected to one end of the sliding frame 602. A transmission wheel 605 is fixedly connected to one end of the worm gear 604. A fixed rack 606 is engaged with one side of the transmission wheel 605. The fixed rack 606 is fixedly connected to the inner wall of the fixed cover 4. A worm wheel 607 is fixedly connected to one end of the hair comb 601. The worm wheel 607 engages with the worm gear 604 for transmission. The worm gear 604 drives the hair comb 601 to rotate, improving the combing effect. The hydraulic rod 702 drives the connected slide block 701 to move. At this time, the L-shaped transmission rod 703 on the slide block 701 will slide in the inclined groove rod 603, thereby driving the sliding frame 602 connected to the inclined groove rod 603 to move. This causes the hair comb 601 at the bottom of the sliding frame 602 to comb the animal hair. Then, when the hair comb 601 meshes with the fixed rack 606, it will drive the worm gear 604 to rotate, which in turn drives the hair comb 601 connected to the worm wheel 607 to rotate.

[0037] By setting a hair combing mechanism 6 on the main body 1 of the drone, the hair at the blood collection site can be combed to both sides when blood is collected from animals. This effectively removes the hair at the blood collection site, allowing the infrared sensor 409, which simulates a mosquito, to more accurately sense the temperature difference in the blood vessels. This helps to locate the blood vessels and reduces the difficulty in locating blood vessels due to hair obstruction. After the hair is combed, the surface of the blood vessels is clearly visible, allowing the main body 1 of the drone to more accurately locate the blood vessels, thereby improving the accuracy of blood collection. By combing the hair, the puncture needle can more smoothly contact the skin and accurately enter the blood vessel. The hair pushing makes the needle penetration path smoother, avoiding the resistance of the hair that could cause the needle to deviate or fail to puncture.

[0038] like Figure 8As shown, the transmission disinfection mechanism 7 includes a slide 701. A hydraulic rod 702 is fixedly connected to one end of the slide 701, and the other end of the hydraulic rod 702 is fixedly connected to the inner wall of the bottom of the fixed cover 4. L-shaped transmission rods 703 are fixedly connected to both sides of the slide 701, and the other end of the L-shaped transmission rods 703 is slidably engaged with the inner wall of the inclined groove rod 603. A spray pipe 704 is fixedly connected through the slide 701. Multiple nozzles 705 are fixedly connected to one end of the spray pipe 704, and a guide pipe 706 is slidably engaged with the inner wall of the other end of the spray pipe 704. The guide pipe 706 is fixedly connected through the inner wall of the storage tank 406. One-way butterfly valves are installed in both the spray pipe 704 and the guide pipe 706. When the hydraulic rod 702 drives the spray pipe 704 to reset, the iodine solution in the storage tank 406 can be drawn into the spray pipe 704 for storage through the guide pipe 706.

[0039] Working principle: When blood needs to be drawn from an animal, the drone body 1 first flies to the appropriate location on the animal. Then, taking advantage of the different temperature characteristics of the blood in the animal's body compared to the surrounding tissues (the blood in the blood vessels is warmer than the surrounding tissues), a clear temperature difference is formed in the infrared imaging of the blood vessels. This temperature difference information can be captured by the infrared sensor 409 to create an image of the blood vessels on the animal's skin surface, thereby locating the blood vessels.

[0040] Then, the electric push rod A201 drives the connected adjusting rack 202 to move, so that the adjusting rack 202 can drive the adjusting frame 3 connected to the adjusting wheel 301 to rotate to a suitable angle. Then, the electric push rod B302 drives the fixed cover 4 to move, so that the hair comb 601 comes into contact with the animal skin.

[0041] Then, the hydraulic rod 702 drives the connected slide block 701 to move. At this time, the L-shaped transmission rod 703 on the slide block 701 will slide in the inclined groove rod 603, thereby driving the sliding frame 602 connected to the inclined groove rod 603 to move, so that the hair comb 601 at the bottom of the sliding frame 602 combs the animal hair. Then, when the hair comb 601 meshes with the fixed rack 606, it will drive the worm 604 to rotate, so that the worm 604 drives the hair comb 601 connected to the worm wheel 607 to rotate, and then continue to drive the fixed cover 4 to move, so that the hair comb 601 presses on the hair and keeps the hair separated.

[0042] Then, when the slide 701 moves, it will drive the spray tube 704 to move. At this time, the iodine in the spray tube 704 will be sprayed out through the nozzle 705 to disinfect the blood collection site.

[0043] Then, the motor 503 drives the connected blood collection seat 5 to rotate, so that one of the negative pressure blood collection needles 502 is aligned with the blood collection port 408. Then, the electric push rod C403 drives the connected squeeze plug 404 to move, so that the squeeze plug 404 can squeeze the negative pressure blood collection needle 502, causing the negative pressure blood collection needle 502 to move out and insert the needle tip into the animal's blood vessel, mimicking mosquito blood collection. At this time, the negative pressure blood collection needle 502 draws blood into the blood collection tube by controlling the negative pressure, realizing the collection of blood samples. When the squeeze plug 404 resets, under the action of the spring 505, it will drive the negative pressure blood collection needle 502 on the needle holder 504 to reset and retract. Then, the cover 402 can be opened by rotating. At this time, the spring 505 will drive the negative pressure blood collection needle 502 to move up a part, so as to facilitate removal.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A mosquito-like unmanned aerial vehicle (UAV) with infrared blood vessel sensing function, comprising a UAV body (1), characterized in that: Several support claws (8) are fixedly connected to the bottom edge of the drone body (1). A lint roller (9) is fixedly installed on the lower surface of the support claws (8). A mounting frame (2) is fixedly connected to the bottom of the drone body (1). An adjustment frame (3) is rotatably connected to the mounting frame (2). A fixed cover (4) is installed below the adjustment frame (3). A blood collection seat (5) is rotatably connected inside the fixed cover (4). A negative pressure blood collection needle (502) is placed inside the blood collection seat (5). A hair combing mechanism (6) is slidably fitted on one side of the bottom end of the fixed cover (4). The bottom of the fixed cover (4) is slidably fitted with a transmission disinfection mechanism (7). The hair combing mechanism (6) includes two symmetrically arranged hair combs (601). A sliding frame (602) is rotatably connected to the hair comb (601). The top of the sliding frame (602) is slidably fitted with the inner wall of the slide groove (405). A slanted groove rod (603) is fixedly connected to one side of the sliding frame (602). A worm gear (604) is rotatably connected to one end of the sliding frame (602). A transmission wheel (605) is fixedly connected to one end of the worm gear (604). A fixed rack (606) is provided on one side for meshing transmission. The fixed rack (606) is fixedly connected to the inner wall of the fixed cover (4). A worm gear (607) is fixedly connected to one end of the hair comb (601). The worm gear (607) meshes with the worm (604) for transmission. The transmission disinfection mechanism (7) includes a slide (701). A hydraulic rod (702) is fixedly connected to one end of the slide (701). The other end of the hydraulic rod (702) is fixedly connected to the inner wall of the bottom end of the fixed cover (4). L-shaped transmission rods are fixedly connected to both sides of the slide (701). 703), the other end of the L-shaped transmission rod (703) is slidably fitted with the inner wall of the inclined groove rod (603), a spray pipe (704) is fixedly connected through the slide (701), a plurality of nozzles (705) are fixedly connected to one end of the spray pipe (704), a guide pipe (706) is slidably fitted to the inner wall of the other end of the spray pipe (704), and the guide pipe (706) is fixedly connected through the inner wall of the storage tank (406). While driving the spray pipe (704) to move and disinfect the blood collection point, it can drive the hair combing mechanism (6) to comb the hair.

2. The mosquito-like blood collection drone with infrared blood vessel sensing function according to claim 1, characterized in that: An electric actuator A (201) is fixedly connected to the mounting bracket (2), and an adjusting rack (202) is fixedly connected to the output end of the electric actuator A (201).

3. The mosquito-like blood collection drone with infrared blood vessel sensing function according to claim 2, characterized in that: An adjusting wheel (301) is fixedly connected to the adjusting frame (3). The adjusting wheel (301) is meshed with the adjusting rack (202) for transmission. An electric push rod B (302) is fixedly connected through the adjusting frame (3). The other end of the electric push rod B (302) is fixedly connected to the fixed cover (4).

4. The mosquito-like blood-collecting drone with infrared blood vessel sensing function according to claim 1, characterized in that: The fixed cover (4) has an outlet (401) on one side, and a cover (402) is threadedly connected to the outlet (401). An electric push rod C (403) is fixedly connected through the other side of the fixed cover (4), and a squeeze plug (404) is fixedly connected to one end of the electric push rod C (403) inside the fixed cover (4).

5. A mosquito-like blood-collecting drone with infrared blood vessel sensing function according to claim 1, characterized in that: The bottom surface of the fixed cover (4) has two sliding grooves (405) with a symmetrical structure. The inner wall of the bottom end of the fixed cover (4) is provided with a liquid storage tank (406). A liquid addition pipe (407) is fixedly connected through the liquid storage tank (406). A blood collection port (408) is provided on one side of the bottom end of the fixed cover (4). An infrared sensor (409) is fixedly installed on one side of the bottom end of the fixed cover (4).

6. A mosquito-like blood-collecting drone with infrared blood vessel sensing function according to claim 4, characterized in that: The blood collection seat (5) has a ring structure with multiple placement slots (501). A negative pressure blood collection needle (502) is placed in the placement slot (501). The top of the negative pressure blood collection needle (502) is in contact with the bottom surface of the squeeze plug (404). A motor (503) is fixedly connected to the inner wall of the middle part of the blood collection seat (5). The motor (503) is fixedly connected to the inner wall of the fixed cover (4).

7. A mosquito-like blood-collecting drone with infrared blood vessel sensing function according to claim 6, characterized in that: A needle holder (504) is slidably fitted inside the placement groove (501). The needle holder (504) is adapted to the negative pressure blood collection needle (502). Springs (505) are fixedly connected to both ends of the needle holder (504). The other end of the spring (505) is fixedly connected to the inner wall of the placement groove (501).

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