Body fluid sampling device for animal experiment
By designing sampling devices that are suitable for different animal body shapes, the fat blockage problem is solved using anti-blocking plates and diversion holes, the sampling efficiency and sample purity are improved, the animal damage is reduced, and the safety and accuracy of the sampling process are ensured.
Patent Information
- Application Number
- CN202510773433.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-11
- Publication Date
- 2025-08-15
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing animal body fluid sampling device is prone to block the needle due to fat when extracting ascites, resulting in inefficient sampling. The needle may damage the animal's internal organs when inserting and pulling out, and the sampling process is complicated, which can easily lead to pain in the animal.
A body fluid sampling device for animal experiments is adopted, including placement blocks, sampling seats, positioning blocks, moving components, variable speed components, lifting components and anti-blocking components. By driving the motor, the gears and sliding plates are moved, adapted to different animal shapes, and the anti-blocking plates and diversion holes are used to avoid fat blockage, ensuring the sampling position is accurate and fast.
It effectively avoids fat blockage, improves sampling efficiency, reduces animal damage, and ensures sample purity and detection accuracy.
Smart Images
Figure CN120477826A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of body fluid sampling, and in particular to a body fluid sampling device for animal experiments. Background Art
[0002] In experiments involving the extraction of animal body fluids, when diagnosing diseases in sick animals or detecting the progression of animal diseases, a body fluid sampling device is required to sample the animal's body fluids. Usually, a syringe with a needle tip is used for extraction. The extracted body fluids can be used to detect whether the animal is infected with the disease so that it can be isolated and treated in a timely manner to prevent the spread of the disease.
[0003] In existing animal body fluid sampling devices, when a traditional injection needle is used to extract ascites, the visceral fat or tissue in the animal's abdominal cavity can easily clog the needle, resulting in poor extraction of ascites, which can easily affect efficiency. In addition, when the needle is inserted into and removed from the animal's body, the fat in the animal's body will directly contact the needle, leaving tissue at the needle tip, making it easier for ascites to cause needle blockage during extraction. Secondly, in the process of sampling animal ascites, multiple steps are required, and the correct needle insertion position must be found. The actual sampling process is extremely demanding of experience. Repeated punctures may cause damage to the internal organs of the animal's abdominal cavity, increasing the animal's pain. Summary of the Invention
[0004] The present application proposes a body fluid sampling device for animal experiments, which has the advantage of preventing fat from clogging the needle during the sampling process, and is used to solve the problem of fat clogging the needle during the sampling process, resulting in reduced sampling efficiency.
[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solution: a body fluid sampling device for animal experiments, comprising a placement block, a sampling seat fixedly connected to the middle section of the placement block, positioning blocks provided on both sides of the sampling seat, and a moving component provided inside the sampling seat; A support plate is fixedly connected to the upper surface of the middle portion of one of the positioning blocks, and positioning holes are provided inside both sides of the positioning block; A first sliding plate is slidably connected to the interior of the sampling seat, a second rack is fixedly connected to the top of the first sliding plate, and a speed change assembly is provided on the top of the second rack; A mounting block is provided inside the sampling seat, and a lifting assembly is provided inside the mounting block; A second chute is provided inside the sampling seat, and an anti-blocking component is provided inside the second chute. Through the arrangement of the sampling seat and the support plate, the animal being sampled can be supported so that it can be in a standing posture.
[0006] Preferably, the moving component includes a driving motor, which is fixedly connected to the sampling seat, and the output end of the driving motor is fixedly connected to a rotating shaft, one end of the rotating shaft is fixedly connected to a first gear, the first sliding plate is arranged on one side of the first gear, and a second sliding plate is arranged on the other side of the first gear, and one side of the bottom of the first sliding plate and the second sliding plate are both fixedly connected to a first rack, and multiple groups of the first racks are engaged with the first gear. By starting the driving motor, the two positioning blocks are driven to move along opposite positions, thereby increasing the length to adapt to animals of different shapes.
[0007] Preferably, the speed change assembly includes a second gear, which is arranged on the top of the second rack, and the second gear is meshed with the second rack. Connecting rods are sleeved on both sides of the second gear, and the other end of the connecting rod is fixedly connected to a limiting plate. The speed change assembly can ensure that the sampling position matches the positioning change speed, avoiding relative displacement caused by equal speed transmission, thereby reducing damage to animals during the sampling process.
[0008] Preferably, the speed change assembly further includes a third rack, the third rack is slidably connected to the limit plate, the third rack is fixedly connected to the sampling seat, and the third rack is meshed with the second gear.
[0009] Preferably, the lifting assembly includes a sliding groove, which is opened in the middle of the third rack. The interior of the sliding groove is slidably connected to a first connecting plate, which is fixedly connected to the limit plate, and the mounting block is slidably connected to the third rack.
[0010] Preferably, the lifting assembly also includes a first electric push rod, which is fixedly connected to the inside of the mounting block, and the output end of the first electric push rod is fixedly connected to a sampling syringe, the sampling syringe is fixedly connected to the mounting block, the middle of one end of the sampling syringe is fixedly connected to a sampling tube, one end of the sampling tube is fixedly connected to a second connecting plate, and the top of the second connecting plate is fixedly connected to a sampling needle, the sampling tube is communicated with the sampling needle, and ascites in the animal body can be extracted through the sampling needle and the second connecting plate, one side of the top of the sampling syringe is fixedly connected to a second electric push rod, and the output end of the second electric push rod is fixedly connected to the second connecting plate, and both sides of the top of the sampling syringe are also fixedly connected to one end of a telescopic rod, and the other end of the telescopic rod is fixedly connected to the second connecting plate, and the sampling needle is driven up by the lifting assembly to complete the sampling of the sampling target.
[0011] Preferably, the anti-blocking assembly includes multiple groups of anti-blocking plates, and the multiple groups of anti-blocking plates are all fitted on both sides of the sampling needle, one side of the anti-blocking plate is hinged with one end of a hinged plate, the interior of the second connecting plate is provided with a first slide groove, the interior of the first slide groove is slidably connected to a first hinge column, the hinge plate is sleeved on the outer side of the mounting block, one side of the hinge plate is fixedly connected with one end of a spring, and the other end of the spring is fixedly connected to the second connecting plate, and the baffle is pushed by ascites to push the anti-blocking plate open, and the ascites can flow into the interior of the sampling needle through the guide hole. In the process of sampling ascites, frequent adjustment or replacement of the needle due to fat blockage can be avoided, thereby shortening the single sampling time and improving work efficiency.
[0012] Preferably, the anti-blocking assembly also includes a second hinged column, which is hinged to the anti-blocking plate. The top of the second hinged column is fixedly connected to a baffle, and the baffle is arranged on the central axis of the sampling needle. A plurality of guide holes are opened on the outside of the sampling needle.
[0013] Preferably, the top of the anti-blocking plate is tilted, which reduces entry resistance and reduces damage to the sampling target when following the sampling needle into the sampling target body. The top of the anti-blocking plate is tilted, which facilitates reducing resistance when the sampling needle is inserted into the sampling animal body.
[0014] Preferably, the sliding connection of the limit plate is T-shaped, and one side of the sliding part is a through setting, which can be slid out through the through setting during disassembly, which is convenient for maintenance. The one side of the sliding part is a through setting, which is convenient for disassembly during subsequent maintenance.
[0015] The beneficial effects of the present invention are as follows: During the process of extracting ascites, the ascites will push the baffle plate, thereby pushing open the anti-blocking plate, and the ascites can flow into the interior of the sampling needle through the guide hole. During the process of sampling ascites, frequent adjustment or replacement of the needle due to fat blockage can be avoided, thereby shortening the single sampling time and improving work efficiency. At the same time, the unobstructed needle can quickly extract ascites, avoid mixing of tissue fluid, blood or debris due to blockage, improve sample purity, and ensure the accuracy of subsequent detection.
[0016] The present invention starts the driving motor to move the mounting block through a series of transmissions to synchronously adjust the sampling position. During this process, after the second rack moves and the second gear itself rotates, the speed will be reduced during the second gear transmission, and the movement distance will be shortened. In actual use, the puncture site is generally the posterior 1 / 3 of the chest cavity, at the junction of the 6th-8th intercostal costal cartilages, and proportional displacement may cause a large offset in the sampling position. The speed change component can ensure that the sampling position matches the positioning change speed, avoiding relative displacement caused by constant speed transmission, thereby reducing damage to animals during the sampling process, avoiding repeated punctures of the needle or accidental contact with organs, and reducing complications such as bleeding and infection.
[0017] The present invention starts a driving motor to drive the rotating shaft to rotate, the rotation of the rotating shaft drives the first gear to rotate, the rotation of the first gear drives the first sliding plate and the second sliding plate to move, the movement of the first sliding plate and the second sliding plate drives the two positioning blocks to move along opposite positions, thereby increasing the length to adapt to animals of different body shapes. It can be customized according to the animal's body shape to avoid sampling failure or damage to the internal organs of the sampled animal due to body shape differences. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The accompanying drawings, which constitute a part of the specification, illustrate embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application in a clear and understandable manner.
[0019] The present disclosure can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 An internal cross-sectional view of the placement block for the present invention; Figure 3 For the present invention Figure 2 A magnified view of the structure at center A; Figure 4 Schematic diagram of the structure of the first gear of the present invention; Figure 5 This is a schematic diagram of the structure of the mobile component of the present invention; Figure 6 For the present invention Figure 5 A magnified view of the structure at point B in the middle; Figure 7 It is an internal cross-sectional view of the mounting block of the present invention; Figure 8 This is an internal cross-sectional view of the sampling needle of the present invention.
[0020] Among them: 1. placement block; 2. sampling seat; 3. positioning block; 4. support plate; 5. positioning hole; 6. drive motor; 7. rotating shaft; 8. first gear; 9. first sliding plate; 10. second sliding plate; 11. first rack; 12. second rack; 13. second gear; 14. connecting rod; 15. limit plate; 16. third rack; 17. sliding groove; 18. first connecting plate; 19. mounting block; 20. first electric push rod; 21. sampling syringe; 22. sampling tube; 23. second connecting plate; 24. sampling needle; 25. second electric push rod; 26. telescopic rod; 27. anti-blocking plate; 28. hinged plate; 29. first slide groove; 30. first hinged column; 31. spring; 32. second hinged column; 33. baffle; 34. second slide groove; 35. guide hole. DETAILED DESCRIPTION
[0021] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.
[0022] See also Figure 1-8 The embodiment of the present invention provides a body fluid sampling device for animal experiments, comprising a placement block 1, a sampling seat 2 fixedly connected to the middle section of the placement block 1, positioning blocks 3 provided on both sides of the sampling seat 2, and a moving component provided inside the sampling seat 2; A support plate 4 is fixedly connected to the upper surface of the middle portion of one of the positioning blocks 3, and positioning holes 5 are provided inside both sides of the positioning block 3; The interior of the sampling seat 2 is slidably connected to a first sliding plate 9, the top of the first sliding plate 9 is fixedly connected to a second rack 12, and a speed change assembly is provided on the top of the second rack 12; The interior of the sampling seat 2 is provided with a mounting block 19, and the interior of the mounting block 19 is provided with a lifting assembly; A second chute 34 is provided inside the sampling seat 2, and an anti-blocking component is provided inside the second chute 34. Through the arrangement of the sampling seat 2 and the support plate 4, the sampled animal can be supported so that it can be in a standing posture. Animals with ascites are weak and have a large body weight. If they are turned over for sampling in the conventional way, the ascites in their bodies may compress their internal organs and respiratory tract, which may cause breathing difficulties and organ hypoxia during the sampling process, causing harm to the sampled animals.
[0023] The moving assembly includes a drive motor 6, which is fixedly connected to the sampling seat 2. The output end of the drive motor 6 is fixedly connected to a rotating shaft 7, one end of the rotating shaft 7 is fixedly connected to a first gear 8, a first sliding plate 9 is provided on one side of the first gear 8, and a second sliding plate 10 is provided on the other side of the first gear 8. One side of the bottom of the first sliding plate 9 and the second sliding plate 10 is fixedly connected to a first rack 11, and multiple groups of first racks 11 are engaged with the first gear 8; By starting the drive motor 6, the rotating shaft 7 is driven to rotate, and the rotation of the rotating shaft 7 drives the first gear 8 to rotate, and the rotation of the first gear 8 drives the first sliding plate 9 and the second sliding plate 10 to move, and the movement of the first sliding plate 9 and the second sliding plate 10 drives the two positioning blocks 3 to move along opposite positions, thereby increasing the length to adapt to animals of different shapes. Custom adjustments can be made according to the body shape of the animal to avoid sampling failure or damage to the internal organs of the sampled animal due to differences in body shape.
[0024] Among them, the speed change assembly includes a second gear 13, which is arranged on the top of the second rack 12, and the second gear 13 is meshed with the second rack 12. A connecting rod 14 is sleeved on both sides of the second gear 13, and the other end of the connecting rod 14 is fixedly connected to the limit plate 15. The speed change assembly also includes a third rack 16, which is slidably connected to the limit plate 15, and the third rack 16 is fixedly connected to the sampling seat 2, and the third rack 16 is meshed with the second gear 13; By starting the drive motor 6 and moving the mounting block 19 through a series of transmissions, the sampling position is adjusted synchronously. During this process, after the second rack 12 moves, and the second gear 13 itself rotates, the second gear 13 will slow down when moving, and its movement distance will be shortened. In actual use, the puncture site is generally the posterior 1 / 3 of the chest cavity, at the junction of the 6th-8th intercostal costal cartilages, and proportional displacement may cause a large offset in the sampling position. The speed change component can ensure that the sampling position matches the positioning change speed, avoiding relative displacement caused by constant speed transmission, thereby reducing damage to the animal during the sampling process, avoiding repeated puncture of the needle or accidental contact with the internal organs, and reducing complications such as bleeding and infection.
[0025] Among them, the lifting assembly includes a sliding groove 17, the sliding groove 17 is opened in the middle of the third rack 16, the sliding groove 17 is internally slidably connected to the first connecting plate 18, the first connecting plate 18 is fixedly connected to the limit plate 15, and the mounting block 19 is slidably connected to the third rack 16. The lifting assembly also includes a first electric push rod 20, the first electric push rod 20 is fixedly connected to the inside of the mounting block 19, the output end of the first electric push rod 20 is fixedly connected to the sampling syringe 21, the sampling syringe 21 is fixedly connected to the mounting block 19, the middle of one end of the sampling syringe 21 is fixedly connected to the sampling tube 22, and one end of the sampling tube 22 is fixedly connected to the third rack 16. Two connecting plates 23, the top of the second connecting plate 23 is fixedly connected with a sampling needle 24, the sampling tube 22 is connected to the sampling needle 24, and the ascites in the animal body can be extracted through the sampling needle 24 and the second connecting plate 23. One side of the top of the sampling syringe 21 is fixedly connected with a second electric push rod 25, and the output end of the second electric push rod 25 is fixedly connected to the second connecting plate 23. The top two sides of the sampling syringe 21 are also fixedly connected with one end of a telescopic rod 26, and the other end of the telescopic rod 26 is fixedly connected to the second connecting plate 23. The sampling needle 24 is driven up by the lifting assembly to complete the sampling of the sampling target.
[0026] Among them, the anti-blocking component includes multiple groups of anti-blocking plates 27, and the multiple groups of anti-blocking plates 27 are all fitted on both sides of the sampling needle 24. One side of the anti-blocking plate 27 is hinged to one end of a hinged plate 28, and a first slide groove 29 is provided inside the second connecting plate 23. The first slide groove 29 is slidably connected to the first hinge column 30. The hinge plate 28 is sleeved on the outer side of the mounting block 19, and one side of the hinge plate 28 is fixedly connected to one end of a spring 31, and the other end of the spring 31 is fixedly connected to the second connecting plate 23. The anti-blocking component also includes a second hinge column 32, which is hinged to the anti-blocking plate 27. The top of the second hinge column 32 is fixedly connected to a baffle 33, which is arranged on the central axis of the sampling needle 24, and a plurality of guide holes 35 are provided on the outer side of the sampling needle 24. During the process of extracting ascites, the ascites will push the baffle 33, thereby pushing open the anti-blocking plate 27, and the ascites can flow into the interior of the sampling needle 24 through the guide hole 35. During the process of sampling ascites, frequent adjustment or replacement of the needle due to fat blockage can be avoided, thereby shortening the single sampling time and improving work efficiency. At the same time, the unobstructed needle can quickly extract ascites, avoid the mixing of tissue fluid, blood or debris due to blockage, improve the purity of the sample, and ensure the accuracy of subsequent testing.
[0027] Among them, the top of the anti-blocking plate 27 is set at an angle, which reduces the entry resistance and reduces the damage to the sampling target when following the sampling needle 24 into the sampling target body. The top of the anti-blocking plate 27 is set at an angle, which facilitates the reduction of resistance when the sampling needle 24 is inserted into the body of the sampling animal, and at the same time facilitates the diversion of ascites.
[0028] Among them, the sliding connection of the limit plate 15 is T-shaped, and one side of the sliding part is a through-setting. When disassembling, it can slide out through the through-setting, which is convenient for maintenance. The sliding connection of the limit plate 15 is T-shaped, so that its left and right displacement is limited, thereby ensuring the stability of the displacement. At the same time, one side of the sliding part is a through-setting, which is convenient for disassembly during subsequent maintenance.
[0029] Working principle: During operation, an animal with ascites is placed on the surface of the sampling seat 2. Since different species of animals have different body sizes, when the body shape of the animal does not match the position, the drive motor 6 is started to drive the rotating shaft 7 to rotate, and the rotation of the rotating shaft 7 drives the first gear 8 to rotate, and the rotation of the first gear 8 drives the first sliding plate 9 and the second sliding plate 10 to move, and the movement of the first sliding plate 9 and the second sliding plate 10 drives the two positioning blocks 3 to move along opposite positions, thereby increasing the length to adapt to animals of different body shapes. Custom adjustments can be made according to the body shape of the animal to avoid sampling failure or damage to the internal organs of the sampled animal due to body shape differences; At the same time, the movement of the first sliding plate 9 drives the second rack 12 to move, and the movement of the second rack 12 drives the second gear 13 to move. After the second gear 13 moves, it drives the connecting rod 14 to move, and the movement of the connecting rod 14 drives the limiting plate 15 to move. The limiting plate 15 moves and drives the first connecting plate 18 to move, and the movement of the first connecting plate 18 drives the mounting block 19 to move, and the sampling position is adjusted synchronously. In this process, after the second rack 12 moves and the second gear 13 itself rotates, the speed will be reduced when the second gear 13 moves, and the distance it moves will be shortened. In actual use, the puncture site is generally the posterior 1 / 3 of the chest cavity, the junction of the 6th-8th intercostal costal cartilage, and proportional displacement may cause the sampling position to deviate significantly. The speed change component can ensure that the sampling position matches the positioning change speed, avoiding relative displacement caused by constant speed transmission, thereby reducing damage to the animal during the sampling process, avoiding repeated puncture of the needle or accidental contact with the internal organs, and reducing complications such as bleeding and infection; After the adjustment is completed, the first electric push rod 20 and the second electric push rod 25 are started to send the sampling needle 24 into the body of the sampling target. When the sampling needle 24 enters the body of the sampling target, the anti-blocking plate 27 is pressed by the fat and closes the guide hole 35. When the sampling needle 24 completely enters the body of the sampling target, the first electric push rod 20 contracts in the opposite direction to pull the sampling syringe 21, and the ascites in the sampling target body is drawn into the interior of the sampling syringe 21 through the sampling tube 22 by air pressure, completing the sampling. During the process of extracting ascites, the ascites will push the baffle 33, thereby pushing open the anti-blocking plate 27, and the ascites can flow into the interior of the sampling needle 24 through the guide hole 35. During the process of sampling ascites, frequent adjustment or replacement of the needle due to fat blockage can be avoided, thereby shortening the single sampling time and improving work efficiency. At the same time, the unobstructed needle can quickly extract ascites, avoid the mixing of tissue fluid, blood or debris due to blockage, improve the purity of the sample, and ensure the accuracy of subsequent testing.
[0030] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.
Claims
1. A body fluid sampling device for animal experiments, comprising a placement block (1), characterized in that: The middle section of the placement block (1) is fixedly connected to a sampling seat (2), positioning blocks (3) are provided on both sides of the sampling seat (2), and a moving component is provided inside the sampling seat (2); A support plate (4) is fixedly connected to the upper surface of the middle portion of one of the positioning blocks (3), and positioning holes (5) are provided inside both sides of the positioning block (3); A first sliding plate (9) is slidably connected to the interior of the sampling seat (2), a second rack (12) is fixedly connected to the top of the first sliding plate (9), and a speed change assembly is provided on the top of the second rack (12); A mounting block (19) is provided inside the sampling seat (2), and a lifting assembly is provided inside the mounting block (19); A second chute (34) is provided inside the sampling seat (2), and an anti-blocking component is provided inside the second chute (34).
2. The body fluid sampling device for animal experiments according to claim 1, characterized in that: The moving assembly includes a driving motor (6), the driving motor (6) is fixedly connected to the sampling seat (2), the output end of the driving motor (6) is fixedly connected to a rotating shaft (7), one end of the rotating shaft (7) is fixedly connected to a first gear (8), the first sliding plate (9) is arranged on one side of the first gear (8), and the other side of the first gear (8) is provided with a second sliding plate (10), one side of the bottom of the first sliding plate (9) and the second sliding plate (10) are fixedly connected to a first rack (11), and multiple groups of the first racks (11) are all engaged with the first gear (8).
3. The body fluid sampling device for animal experiments according to claim 2, characterized in that: The speed change assembly comprises a second gear (13), the second gear (13) is arranged on the top of the second rack (12), the second gear (13) is meshed with the second rack (12), and connecting rods (14) are sleeved on both sides of the second gear (13), and the other end of the connecting rod (14) is fixedly connected to a limit plate (15).
4. The body fluid sampling device for animal experiments according to claim 3, characterized in that: The speed change assembly further includes a third rack (16), the third rack (16) is slidably connected to the limit plate (15), the third rack (16) is fixedly connected to the sampling seat (2), and the third rack (16) is meshed with the second gear (13).
5. The body fluid sampling device for animal experiments according to claim 4, characterized in that: The lifting assembly includes a sliding groove (17), the sliding groove (17) is opened in the middle of the third rack (16), the interior of the sliding groove (17) is slidably connected to a first connecting plate (18), the first connecting plate (18) is fixedly connected to the limiting plate (15), and the mounting block (19) is slidably connected to the third rack (16).
6. The body fluid sampling device for animal experiments according to claim 5, characterized in that: The lifting assembly further comprises a first electric push rod (20), the first electric push rod (20) being fixedly connected to the interior of the mounting block (19), the output end of the first electric push rod (20) being fixedly connected to a sampling syringe (21), the sampling syringe (21) being fixedly connected to the mounting block (19), a sampling tube (22) being fixedly connected to the middle of one end of the sampling syringe (21), one end of the sampling tube (22) being fixedly connected to a second connecting plate (23), the top of the second connecting plate (23) being fixedly connected to a sampling needle (2 4), the sampling tube (22) is connected to the sampling needle (24), and the ascites in the animal body can be extracted through the sampling needle (24) and the second connecting plate (23). One side of the top of the sampling syringe (21) is fixedly connected to the second electric push rod (25), and the output end of the second electric push rod (25) is fixedly connected to the second connecting plate (23). The top two sides of the sampling syringe (21) are also fixedly connected to one end of the telescopic rod (26), and the other end of the telescopic rod (26) is fixedly connected to the second connecting plate (23).
7. The body fluid sampling device for animal experiments according to claim 6, characterized in that: The anti-blocking assembly includes multiple groups of anti-blocking plates (27), and the multiple groups of anti-blocking plates (27) are all attached to both sides of the sampling needle (24). One side of the anti-blocking plate (27) is hinged to one end of a hinged plate (28), and a first slide groove (29) is provided inside the second connecting plate (23). The first slide groove (29) is slidably connected to a first hinge column (30). The hinged plate (28) is sleeved on the outside of the mounting block (19), and one side of the hinged plate (28) is fixedly connected to one end of a spring (31), and the other end of the spring (31) is fixedly connected to the second connecting plate (23).
8. The body fluid sampling device for animal experiments according to claim 7, characterized in that: The anti-blocking assembly further comprises a second hinged column (32), the second hinged column (32) being hinged to the anti-blocking plate (27), the top of the second hinged column (32) being fixedly connected to a baffle plate (33), the baffle plate (33) being arranged on the central axis of the sampling needle (24), and a plurality of guide holes (35) being provided on the outer side of the sampling needle (24).
9. The body fluid sampling device for animal experiments according to claim 8, characterized in that: The top of the anti-blocking plate (27) is tilted to reduce entry resistance and damage to the sampling target when following the sampling needle (24) into the sampling target body.
10. The body fluid sampling device for animal experiments according to claim 9, characterized in that: The sliding connection of the limit plate (15) is T-shaped, and one side of the sliding portion is provided with a through-hole, so that the limit plate (15) can be slid out through the through-hole during disassembly, which is convenient for maintenance.