Blood sampling experiment device

Through the blood collection experimental device integrating a portable box, base, motor, telescopic mechanism, placing disk, tightening mechanism and liquid spraying extrusion mechanism, the problem of single function of the blood collection experimental device and time-consuming and labor-intensive centrifugal operation in the prior art is solved, efficient blood collection and centrifugal operation is achieved, and the practicality and automation level of the device are improved.

CN120458743AInactive Publication Date: 2025-08-12XIANGSHAN COUNTY RED CROSS TAIWAN COMPATRIOTS HOSPITAL MEDICAL HEALTH GRP
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Patent Information

Application Number
CN202510939248.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-07-08
Publication Date
2025-08-12
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The existing blood collection experimental device has a single function, and the centrifugal operation is time-consuming and labor-intensive, reducing the efficiency and practicality of blood collection experiments.

Method used

A blood collection experimental device including a portable box, base, motor, telescopic mechanism, placing disk, tightening mechanism, air pump and liquid spray extrusion mechanism was designed, which realizes blood collection and centrifugal operations on the same equipment, reducing transport and operation steps.

Benefits of technology

It improves the efficiency and practicality of blood collection experiments, reduces the work burden of medical staff, and saves time and manpower through automated operations.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to the technical field of blood sampling equipment, and discloses a blood sampling experiment device which comprises a portable box, a base is fixedly connected to the bottom end of the interior of the portable box, a motor is fixedly connected to the interior of the base, a telescopic mechanism is fixedly connected to the output end of the motor, and a containing disc is fixedly connected to the top of the telescopic mechanism. A placement ring is rotatably connected to the interior of the placement disc, an abutting mechanism is fixedly connected to the interior of the placement disc, an air pump is fixedly connected to the bottom end of the interior of the portable box, a liquid spraying and extruding mechanism is arranged outside the portable box, the telescopic mechanism comprises a bottom cylinder, and the bottom of the bottom cylinder is fixedly connected to the output end of the motor. According to the blood sampling experiment device, the abutting mechanism is arranged and can be driven by the motor to rotate and centrifuge, then the function of the blood sampling experiment device can be increased, centrifugation can be carried out on the device when needed, time and labor are saved, the efficiency of the blood sampling experiment device is improved, and meanwhile the practicability of the blood sampling experiment device can be improved.
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Description

Technical Field

[0001] The present invention relates to the technical field of blood sampling equipment, in particular to a blood sampling experimental device. Background Art

[0002] Blood sampling equipment is crucial for obtaining high-quality blood samples. Accurate blood collection and reliable sample quality help researchers gain a deeper understanding of disease pathogenesis, evaluate drug efficacy and safety, and provide strong support for the development of medical science.

[0003] The blood sampling experimental device in the prior art mainly uses a vacuum blood collection tube and a blood collection needle to collect blood from the blood collector under the control of medical staff. It has a single function. Therefore, if other operations are to be performed, it needs to be transferred to other devices. For example, when the blood sample is centrifuged, it needs to be performed in a centrifugal device, which not only wastes the transportation time but also increases the operation steps, is time-consuming and labor-intensive, reduces the efficiency of the blood sampling experiment, and also reduces the practicality of the blood sampling test device. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides a blood sampling experiment device, which solves the problem that the blood sampling experiment device in the existing technology has a single function, is time-consuming and labor-intensive during centrifugation operation, reduces the efficiency of the blood sampling experiment, and also reduces the practicality of the blood sampling experiment device.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a blood sampling experiment device, including a portable box, the inner bottom end of the portable box is fixedly connected to a base, the inner part of the base is fixedly connected to a motor, the output end of the motor is fixedly connected to a telescopic mechanism, the top of the telescopic mechanism is fixedly connected to a placement plate, the inner part of the placement plate is rotatably connected to a placement ring, the inner part of the placement plate is fixedly connected to a tightening mechanism, the inner bottom end of the portable box is fixedly connected to an air pump, and the outside of the portable box is provided with a liquid spraying and squeezing mechanism.

[0006] Preferably, the telescopic mechanism includes a bottom cylinder, the bottom of the bottom cylinder is fixedly connected to the output end of the motor, the interior of the bottom cylinder is slidably connected to a limit block, a plurality of slide grooves are provided on the outside of the limit block, a plurality of slide bars are fixedly connected to the interior of the bottom cylinder, the outer sides of the plurality of slide bars are slidably connected to the inner sides of the slide grooves, a liquid storage tank is provided on the inner wall of the bottom cylinder, a hole is provided between the interior of the bottom cylinder and the interior of the liquid storage tank, a movable rod is fixedly connected to the top of the limit block, and a spring is fixedly connected between the interior of the limit block and the interior of the bottom cylinder.

[0007] Preferably, the tightening mechanism includes a plurality of fixed cylinders, the interior of the fixed cylinder is slidably connected to a sliding block, the interior of the sliding block is fixedly connected to the interior of the fixed cylinder with a second spring, the side of the sliding block away from the first spring is fixedly connected to a sliding column, the end of the sliding column away from the sliding block is fixedly connected to a support plate, a receiving groove is provided inside the movable rod, the interior of the receiving groove is slidably connected to a limiting plate, the top of the limiting plate is fixedly connected to a sliding column, the top of the sliding column is fixedly connected to a blocking plate, the external top end of the movable rod is rotatably connected to a rotating air sleeve, and the external sleeve of the sliding column is provided with a spring three.

[0008] Preferably, the liquid spray extrusion mechanism includes a rotating frame, one end of the rotating frame is rotatably connected to the outer side of the portable box, the other end of the rotating frame is rotatably connected to an arm placement sleeve, the inner side of the arm placement sleeve is fixedly connected to an air bag, the top of the air bag is fixedly connected to an air release valve, the top of the arm placement sleeve is fixedly connected to a liquid spray nozzle, the inner side of the portable box is fixedly connected to a liquid tank, and a liquid hose is fixedly connected between the bottom of the liquid tank and the outside of the liquid spray nozzle.

[0009] Preferably, the output end of the air pump is fixedly connected to a three-way valve, and one end of the three-way valve is fixedly connected to the external top end of the liquid tank through a ventilation pipe.

[0010] Preferably, a connecting pipe is fixedly connected between the other end of the three-way valve and the outside of the rotating air sleeve, and a blood collection bottle is arranged inside the placement ring.

[0011] Preferably, the outside of the air release valve passes through the top of the arm placement sleeve, the top of the liquid tank is fixedly connected to a liquid injection tube, and the top of the liquid injection tube is threadedly connected to a sealing cover.

[0012] Preferably, one end of the spring three is fixedly connected to the bottom of the blocking plate, and the other end of the spring three is fixedly connected to the inside of the top end of the movable rod.

[0013] Preferably, a rotating cover is rotatably connected to one side of the top of the portable box, and an extrusion block is fixedly connected to the inner side of the rotating cover.

[0014] Preferably, the exterior of the sliding column passes through the fixing tube and the side of the placement plate close to the abutment plate, and the sliding column passes through the top of the movable rod.

[0015] The present invention provides a blood sampling experiment device having the following beneficial effects: 1. This device features a locking mechanism that prevents the blood collection bottle from rotating during blood collection, ensuring a stable process. When centrifugation is required, the motor drives the blood collection bottle to rotate and centrifuge. This eliminates the need to transport the sample to other equipment, saving time and steps, improving the efficiency of the blood collection device, and increasing its functionality, thereby enhancing its practicality.

[0016] 2. Automated operation reduces the burden on medical staff: An air pump provides air pressure, inflating the airbag and squeezing the patient's arm, replacing the manual rubber banding required by medical staff. Furthermore, the increased air pressure automatically sprays disinfectant from the tank through the spray nozzle, achieving automatic disinfection of the arm, eliminating the need for medical staff to manually apply disinfectant. These automated operations save time, reduce the workload of medical staff, and improve blood collection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a three-dimensional Figure 1 ; Figure 2 The present invention is a three-dimensional Figure 2 ; Figure 3 Schematic diagram of the structure of the rotating frame of the present invention; Figure 4 Schematic diagram of the structure of the bottom tube of the present invention; Figure 5 It is a structural diagram of the placement ring in the present invention; Figure 6 It is a structural schematic diagram of the movable rod in the present invention; Figure 7 This is a schematic diagram of the structure of the placement plate in the present invention; Figure 8 Schematic diagram of the structure of the blocking plate in the present invention; Figure 9 It is a structural schematic diagram of the abutment plate in the present invention.

[0018] Among them, 1. portable box; 2. base; 3. telescopic mechanism; 301. bottom tube; 302. limit block; 303. slide; 304. slide bar; 305. liquid storage tank; 306. movable rod; 4. placement plate; 5. placement ring; 6. tightening mechanism; 601. fixed tube; 602. sliding block; 603. sliding column; 604. support plate; 605. storage tank; 606. limit plate; 607. slide column; 608. blocking plate; 609. rotating air sleeve; 7. air pump; 8. liquid tank; 9. rotating frame; 10. arm placement sleeve; 11. air bag; 12. air release valve; 13. liquid spray nozzle; 14. blood collection bottle; 15. squeezing block. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the present specification. 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.

[0020] Example 1: Please refer to the attached Figure 1 - Attachment Figure 9 The embodiment of the present invention provides a blood sampling experiment device, including a portable box 1, the bottom end of the interior of the portable box 1 is fixedly connected to a base 2, the base 2 provides an installation position and maintains the stability of the device, the interior of the base 2 is fixedly connected to a motor, the output end of the motor is fixedly connected to a telescopic mechanism 3, the top of the telescopic mechanism 3 is fixedly connected to a placement plate 4, the placement plate 4 can provide a placement position, the interior of the placement plate 4 is rotatably connected to a placement ring 5, the interior of the placement plate 4 is fixedly connected to a tightening mechanism 6, the tightening mechanism 6 can keep the placement ring 5 from rotating, the bottom end of the interior of the portable box 1 is fixedly connected to an air pump 7, the air pump 7 can provide gas pressure, the outside of the portable box 1 is provided with a liquid spraying extrusion mechanism, the liquid spraying extrusion mechanism can squeeze the arm of the blood collector and can spray liquid, the top side of the portable box 1 is rotatably connected to a rotating cover, the inner side of the rotating cover is fixedly connected to an extrusion block 15, the extrusion block 15 can squeeze the top of the placement plate 4.

[0021] The telescopic mechanism 3 includes a bottom cylinder 301, which can provide an installation position and a liquid filling position. The bottom of the bottom cylinder 301 is fixedly connected to the output end of the motor. The interior of the bottom cylinder 301 is slidably connected to a limit block 302, which can play a limiting role. The outside of the limit block 302 is provided with a plurality of slide grooves 303, and the interior of the bottom cylinder 301 is fixedly connected to a plurality of slide bars 304. The slide grooves 303 and the slide bars 304 can prevent the limit block 302 from rotating. The outsides of the plurality of slide bars 304 are slidably connected to the inner side of the slide grooves 303. A liquid storage tank 305 is provided on the inner wall of the bottom cylinder 301, and a hole is provided between the interior of the bottom cylinder 301 and the interior of the liquid storage tank 305. The top of the limit block 302 is fixedly connected to a movable rod 306, and a spring 1 is fixedly connected between the interior of the limit block 302 and the interior of the bottom cylinder 301. When the rotating cover is closed, the squeezing block 15 is driven to rotate downward, thereby abutting against the top of the placement tray 4, thereby enabling the placement tray 4 to move downward, thereby driving the movable rod 306 to move downward. When the movable rod 306 moves downward, it drives the limiting block 302 to move downward, thereby compressing the spring 1 and pushing the liquid inside the bottom tube 301 into the liquid storage tank 305 through the hole. When the rotary cover is opened, the limit block 302 can be pushed upward by the action of spring 1, and then the limit block 302, the movable rod 306 and the placement tray 4 can be pushed upward. Since the limit block 302 can draw the liquid in the liquid storage tank 305 into the interior of the bottom cylinder 301 through the hole when it moves upward, the size of the hole is limited at this time. Therefore, when the liquid enters the interior of the bottom cylinder 301, it moves slowly upward under the action of the liquid, and then the placement tray 4 can be moved slowly upward, thereby preventing the placement tray 4 from moving upward quickly, causing damage to the blood collection bottle 14 or shaking the blood inside the blood collection bottle 14, and thus preventing the blood sample from being affected.

[0022] Embodiment 2: The tightening mechanism 6 includes a plurality of fixed cylinders 601, which can provide an installation position. The interior of the fixed cylinder 601 is slidably connected to a sliding block 602, which has a limiting function. A second spring is fixedly connected between the interior of the sliding block 602 and the interior of the fixed cylinder 601. The second spring can drive the sliding block 602 to reset. The side of the sliding block 602 away from the spring 1 is fixedly connected to a sliding column 603. The end of the sliding column 603 away from the sliding block 602 is fixedly connected to a plate 604. The internal opening of the movable rod 306 A receiving groove 605 is provided, and the interior of the receiving groove 605 is slidably connected to a limit plate 606, which has a limiting function. A sliding post 607 is fixedly connected to the top of the limit plate 606. The receiving groove 605 can provide space for the sliding post 607 to slide into, and a blocking plate 608 is fixedly connected to the top of the sliding post 607. The blocking plate 608 can prevent the top of the placement plate 4 from being blocked. The outer top end of the movable rod 306 is rotatably connected to a rotating air sleeve 609. The rotating air sleeve 609 can prevent the connecting pipe from generating motion interference when the movable rod 306 rotates. A spring 3 is sleeved on the outside of the sliding post 607. One end of the spring 3 is fixedly connected to the bottom of the blocking plate 608, and the other end of the spring 3 is fixedly connected to the top inner portion of the movable rod 306. The outside of the sliding post 603 passes through the fixed cylinder 601 and the side of the placement plate 4 close to the abutment plate 604. The sliding post 607 passes through the top of the movable rod 306. When collecting blood, first start the air pump 7. After the air pump 7 is started, the side of the three-way valve connected to the connecting pipe is opened. At this time, the gas will enter the interior of the rotating air sleeve 609 through the connecting pipe, and enter the top interior of the movable rod 306 through the rotating air sleeve 609. At this time, the gas will push the blocking plate 608 upward, so that the blocking plate 608 is pressed against the inner bottom end of the placement disk 4, so that the gas will not overflow from the interior of the placement disk 4. The gas will enter the interior of the fixed cylinder 601 and push the sliding block 602 to move in the direction of the abutment plate 604, and then it can push the sliding column 603 and the abutment plate 604 to move in the direction of the placement ring 5, so that the abutment plate 604 can abut against the outside of the placement ring 5. At this time, the placement ring 5 will not rotate, which is convenient for blood collection. When the blood in the blood collection bottle 14 needs to be centrifuged, the air pump 7 is turned off and the blocking plate 608 is pressed downward, which can drive the sliding post 607 to be pressed downward, so that the blocking plate 608 no longer blocks the inner side of the placement tray 4. At this time, the air inside the placement tray 4 will be discharged to the outside through the hole on the top of the placement tray 4. Therefore, the air pressure inside the fixed cylinder 601 becomes smaller, and then the sliding block 602, the sliding post 603 and the support plate 604 can be pulled toward the middle of the placement tray 4 under the action of the spring 2. At this time, The abutment plate 604 is no longer pressed against the placing ring 5, and the placing ring 5 can rotate at this time. Then the motor is started, and the output end of the motor rotates to drive the telescopic mechanism 3 to rotate. After the telescopic mechanism 3 rotates, it can drive the placing plate 4 to rotate. After the placing plate 4 rotates, it can swing the placing ring 5 and the blood collection bottle 14 inside the placing ring 5. Since the placing plate 4 drives the blood collection bottle 14 to move out of the interior of the portable box 1, it can prevent the blood collection bottle 14 from touching the inner wall of the portable box 1 when rotating, causing damage to the blood collection bottle 14.

[0023] The liquid spraying and extrusion mechanism includes a rotating frame 9, one end of the rotating frame 9 is rotatably connected to one side of the outer side of the portable box 1, and the other end of the rotating frame 9 is rotatably connected to an arm placement sleeve 10, the inner side of the arm placement sleeve 10 is fixedly connected to an air bag 11, the top of the air bag 11 is fixedly connected to a deflation valve 12, the top of the arm placement sleeve 10 is fixedly connected to a liquid spraying nozzle 13, the inner side of the portable box 1 is fixedly connected to a liquid tank 8, a liquid hose is fixedly connected between the bottom of the liquid tank 8 and the outside of the liquid spraying nozzle 13, the output end of the air pump 7 is fixedly connected to a three-way valve, one end of the three-way valve is fixedly connected to the external top end of the liquid tank 8 through a ventilation pipe, and a connecting pipe is fixedly connected between the other end of the three-way valve and the outside of the rotating air sleeve 609, a blood collection bottle 14 is provided inside the placement ring 5, the outside of the deflation valve 12 passes through the top of the arm placement sleeve 10, the top of the liquid tank 8 is fixedly connected to a liquid injection tube, and the top of the liquid injection tube is threadedly connected to a sealing cap; When drawing blood, place the arm inside the airbag 11, start the air pump 7, close the three-way valve and the connecting pipe side, and open the other two ends. At this time, the gas will enter the airbag 11 and the liquid tank 8 through the two pipes respectively, which can increase the air pressure inside the liquid tank 8 and the airbag 11. Therefore, the airbag 11 will squeeze the arm of the person to be blood drawn. At the same time, after the air pressure in the liquid tank 8 is increased, the valve between the liquid hose and the liquid spray nozzle 13 is opened. At this time, the liquid in the liquid tank 8 can be passed through the liquid hose to pass the disinfectant liquid into the interior of the liquid spray nozzle 13 and sprayed out. The sprayed disinfectant liquid will adhere to the arm of the person to be blood drawn, and then the arm can be disinfected.

[0024] In combination with Example 1 and Example 2, the working principle of the present invention is as follows: The lifting and lowering buffering principle of the placement tray 4: when the rotating cover is closed, the squeezing block 15 pushes the placement tray 4 downward, driving the movable rod 306 and the limit block 302 to move downward, compressing the spring 1, and the liquid in the bottom tube 301 is squeezed into the liquid storage tank 305 through the hole; when the rotating cover is opened, the spring 1 pushes the limit block 302 upward, and the liquid in the liquid storage tank 305 is slowly drawn into the bottom tube 301 through the hole, so that the placement tray 4 rises slowly, avoiding damage to the blood collection bottle 14 and blood shaking.

[0025] Blood collection fixation: Start the air pump 7 and open the three-way valve connecting tube side. The gas enters the top of the movable rod 306 through the rotating air sleeve 609, lifts the blocking plate 608, and the gas enters the fixed cylinder 601 to push the sliding block 602, sliding column 603 and the abutment plate 604 to press against the placement ring 5 to prevent it from rotating.

[0026] Centrifugal operation: turn off the air pump 7, press the sealing plate 608, the air in the placement tray 4 is discharged through the top hole, the air pressure in the fixed cylinder 601 becomes smaller, the second spring pulls the sliding block 602, the sliding column 603 and the abutment plate 604 to release the placement ring 5, the motor drives the telescopic mechanism 3 and the placement tray 4 to rotate, so that the blood collection bottle 14 is centrifuged, and the placement tray 4 drives it to move out of the portable box 1 to prevent collision.

[0027] Principle of blood collection pretreatment: put the arm into the airbag 11, start the air pump 7, close the three-way valve and the connecting pipe side and open the other two ends, the gas enters the airbag 11 and the liquid tank 8 through the pipeline, the airbag 11 squeezes the arm, the air pressure in the liquid tank 8 increases, open the valve between the liquid hose and the liquid spray nozzle 13, and the disinfectant liquid is sprayed out to disinfect the arm.

[0028] The above content is merely an example and explanation of the structure of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the scope of protection of the present invention.

[0029] Throughout this specification, references to terms such as "one embodiment," "example," and "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0030] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to specific embodiments. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A blood sampling experimental device, comprising a portable box (1), characterized in that: The bottom end of the interior of the portable box (1) is fixedly connected to a base (2), the interior of the base (2) is fixedly connected to a motor, the output end of the motor is fixedly connected to a telescopic mechanism (3), the top of the telescopic mechanism (3) is fixedly connected to a placement plate (4), the interior of the placement plate (4) is rotatably connected to a placement ring (5), the interior of the placement plate (4) is fixedly connected to a tightening mechanism (6), the bottom end of the interior of the portable box (1) is fixedly connected to an air pump (7), and the exterior of the portable box (1) is provided with a liquid spraying and squeezing mechanism.

2. A blood sampling experiment device according to claim 1, characterized in that: The telescopic mechanism (3) comprises a bottom cylinder (301), the bottom of the bottom cylinder (301) is fixedly connected to the output end of the motor, the interior of the bottom cylinder (301) is slidably connected to a limit block (302), the exterior of the limit block (302) is provided with a plurality of slide grooves (303), the interior of the bottom cylinder (301) is fixedly connected to a plurality of slide bars (304), the exteriors of the plurality of slide bars (304) are slidably connected to the inner sides of the slide grooves (303), a liquid storage tank (305) is provided on the inner wall of the bottom cylinder (301), a hole is provided between the interior of the bottom cylinder (301) and the interior of the liquid storage tank (305), a movable rod (306) is fixedly connected to the top of the limit block (302), and a spring 1 is fixedly connected between the interior of the limit block (302) and the interior of the bottom cylinder (301).

3. A blood sampling experiment device according to claim 2, characterized in that: The tightening mechanism (6) includes a plurality of fixed cylinders (601), the interior of the fixed cylinder (601) is slidably connected to a sliding block (602), the interior of the sliding block (602) and the interior of the fixed cylinder (601) are fixedly connected to a spring 2, the side of the sliding block (602) away from the spring 1 is fixedly connected to a sliding column (603), the end of the sliding column (603) away from the sliding block (602) is fixedly connected to a pressing plate (604), a receiving groove (605) is provided inside the movable rod (306), the interior of the receiving groove (605) is slidably connected to a limiting plate (606), the top of the limiting plate (606) is fixedly connected to a sliding column (607), the top of the sliding column (607) is fixedly connected to a blocking plate (608), the external top end of the movable rod (306) is rotatably connected to a rotating air sleeve (609), and the external sleeve of the sliding column (607) is provided with a spring 3.

4. A blood sampling experiment device according to claim 1, characterized in that: The liquid spraying and squeezing mechanism comprises a rotating frame (9), one end of the rotating frame (9) is rotatably connected to the outer side of the portable case (1), the other end of the rotating frame (9) is rotatably connected to an arm placement sleeve (10), the inner side of the arm placement sleeve (10) is fixedly connected to an air bag (11), the top of the air bag (11) is fixedly connected to an air release valve (12), the top of the arm placement sleeve (10) is fixedly connected to a liquid spraying nozzle (13), the inner side of the portable case (1) is fixedly connected to a liquid tank (8), and a liquid hose is fixedly connected between the bottom of the liquid tank (8) and the outer side of the liquid spraying nozzle (13).

5. A blood sampling experiment device according to claim 4, characterized in that: The output end of the air pump (7) is fixedly connected to a three-way valve, and one end of the three-way valve is fixedly connected to the external top end of the liquid tank (8) through a ventilation pipe.

6. A blood sampling experiment device according to claim 5, characterized in that: A connecting pipe is fixedly connected between the other end of the three-way valve and the outside of the rotating air sleeve (609), and a blood collection bottle (14) is provided inside the placement ring (5).

7. A blood sampling experiment device according to claim 4, characterized in that: The outside of the air release valve (12) passes through the top of the arm placement sleeve (10), the top of the liquid tank (8) is fixedly connected to a liquid injection pipe, and the top of the liquid injection pipe is threadedly connected to a sealing cover.

8. The blood sampling experiment device according to claim 3, characterized in that: One end of the spring three is fixedly connected to the bottom of the blocking plate (608), and the other end of the spring three is fixedly connected to the inside of the top end of the movable rod (306).

9. The blood sampling experiment device according to claim 1, characterized in that: A rotating cover is rotatably connected to one side of the top of the portable box (1), and an extrusion block (15) is fixedly connected to the inner side of the rotating cover.

10. The blood sampling experiment device according to claim 3, characterized in that: The outside of the sliding column (603) passes through the fixed cylinder (601) and the side of the placement plate (4) close to the abutment plate (604), and the sliding column (607) passes through the top of the movable rod (306).