Miniature pig blood collection device for animal medical experiment

Abstract

The invention relates to the technical field of blood collection, in particular to a miniature pig blood collection device for animal medical experiments, which comprises a cage body, and a trunk clamping mechanism, a head clamping mechanism and a mouth clamping mechanism are sequentially arranged in the cage body from the tail to the head along the length direction of the cage body; a linkage type driving mechanism is arranged on the inner side of the head of the cage body, and the linkage type driving mechanism is used for tightening the head clamping mechanism; the head clamping mechanism, the mouth clamping mechanism and the linkage type driving mechanism are arranged, the linkage type driving mechanism can enable the head clamping mechanism to be tightened and meanwhile enable the mouth clamping mechanism to move upwards, and therefore in the process of fixing the head of the miniature pig, the mouth of the miniature pig can be supported synchronously, and the head of the miniature pig can be fixed conveniently. Therefore, the head and the neck of the miniature pig are raised, the head of the miniature pig is not injured, meanwhile, the fixing effect is not affected, and blood sampling work is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of blood collection, in particular to a small pig blood collection device used for animal medical experiments. Background Art

[0002] In animal medical experiments, blood collection from miniature pigs is a routine operation, which usually involves a variety of blood collection methods and techniques, such as ear vein blood collection, anterior vena cava blood collection and tail vein blood collection. In the laboratory, when collecting blood from miniature pigs, the standing restraint blood collection method is generally used for anterior vena cava blood collection. When collecting blood, a pig restrainer is used to make the pig stand vertically, with the head and body in a straight line, and upward at a certain angle to the horizontal plane (such as 30 degrees) to expose the neck concave. After the blood collector disinfects the concave area, he holds a disposable veterinary blood collector in his right hand, aims at the lowest concave area of ​​the neck, and pierces the blood at a certain angle (such as 45 degrees) toward the proximal end.

[0003] For example, the patent with the authorization announcement number CN107396848B discloses a method for drawing blood samples from pigs, the method comprising the following steps: S1, opening the cage door of the pig cage, driving the pig out of the pigsty and driving it into the pig cage; S2, restraining the pig with a restraint belt, closing the cage door, and transporting the pig to a designated medical point with the pig cage; S3, lifting the pig with the restraint belt to separate the pig's limbs from the bottom of the pig cage, fixing the pig's head with a baffle and lifting the pig's lower jaw with a support plate; S4, inserting a needle into the pig's lower jaw for blood sampling. During the blood drawing process of the method of the present invention, there is no need for staff to fix the pig, the pig cage itself can limit the pig's struggling movements, saving labor costs, and the fixing effect is good, and the staff can quickly find the blood drawing site.

[0004] In the above technical solution, the position of the baffle is adjusted by the third driving mechanism to fix the pig's head; the position of the support plate is adjusted by the lifting mechanism to lift the pig's lower jaw. Since the baffle and the support plate are adjusted by independent mechanisms, it is not easy to fix the head and lift the lower jaw simultaneously, which is not conducive to the blood collection work. For example, if the head is fixed first and then the lower jaw is lifted, since the head is fixed, when the lower jaw is lifted, friction will occur between the head and the baffle, which can easily cause abrasions on the head of the miniature pig. If the lower jaw is lifted first and then the head is fixed, in the process of lifting the lower jaw, since the head is not fixed, when the miniature pig struggles violently, the lower jaw is easy to detach from the support plate, thereby affecting the fixing effect. To this end, we propose a miniature pig blood collection device for animal medical experiments to well solve the above-mentioned drawbacks. Summary of the invention

[0005] The purpose of the present invention is to provide a blood collection device for miniature pigs in animal medical experiments, aiming to solve the problem in the prior art proposed in the above background technology that it is not easy to synchronize the head fixation and the jaw lifting, which is not conducive to the blood collection work.

[0006] The present invention is achieved through the following technical solutions: A blood collection device for miniature pigs in animal medical experiments, including a cage body: Both ends of the cage body along its own length direction form a head and a tail respectively. The top surface and the tail of the cage body are both open. Inside the cage body, a torso clamping mechanism, a head clamping mechanism, and a mouth clamping mechanism are sequentially arranged from the tail to the head along its own length direction; A linkage drive mechanism is arranged inside the head of the cage body. The linkage drive mechanism is used to tighten the head clamping mechanism. When the head clamping mechanism is tightened, it can synchronously drive the mouth clamping mechanism to move upward; A mobile venous blood collection mechanism is arranged outside the cage body. The mobile venous blood collection mechanism is used for neck vein blood collection of miniature pigs with their heads and necks raised.

[0007] Optionally, the torso clamping mechanism includes torso clamping plates movably arranged on both left and right sides inside the cage body. A number of hydraulic cylinders are connected between the mutually remote sides of the two torso clamping plates and the cage body; Soft torso protection pads are fixedly connected to the mutually approaching sides of the two torso clamping plates. Each soft torso protection pad and each torso clamping plate are arc-shaped.

[0008] Optionally, the head clamping mechanism includes head clamping plates movably arranged on both left and right sides inside the cage body. Soft head protection pads are movably arranged on the mutually approaching sides of each head clamping plate.

[0009] Optionally, the linkage drive mechanism includes movable seats fixed to the tops of each head clamping plate; the top of the cage body is rotationally connected through a bearing and a shaft seat with a bidirectional lead screw. The bidirectional lead screw is arranged along the width direction of the cage body and is in screw fit with each movable seat. A servo motor for driving the bidirectional lead screw to rotate is installed on the cage body; A number of guide rods parallel to the bidirectional lead screw are fixed on the cage body, and each guide rod movably passes through each movable seat.

[0010] Optionally, the linkage drive mechanism further includes a lifting plate slidably arranged vertically inside the cage body. A connecting frame is fixed between the bottom of the lifting plate and the mouth clamping mechanism; Linkage sliding rods are fixed on the sides of each movable seat close to the lifting plate. Sliding grooves in one-to-one correspondence with each linkage sliding rod are opened on the lifting plate; The sliding groove includes a first horizontal groove, an inclined groove sloping downward, and a second horizontal groove sequentially arranged along the moving direction of the movable seat.

[0011] Optionally, the mouth clamping mechanism includes a lower jaw support plate connected to the linkage drive mechanism. The upper end surface of the lower jaw support plate is inclined and arc-shaped, and a lower jaw protection soft pad is fixed on the upper end surface of the lower jaw support plate. Rotating shafts are respectively rotatably connected to the left and right sides of the lower jaw support plate. Arc-shaped upper jaw clamping plates are fixed on the respective rotating shafts, and upper jaw protection soft pads are fixed on the respective upper jaw clamping plates.

[0012] Optionally, gears are fixedly sleeved on the ends of the respective rotating shafts away from the tail of the cage. A rack meshing with each gear one by one is movably arranged in the cage. Each rack is arranged in the vertical direction and is located between two gears. A connecting plate is fixed between the two racks. A first limit block located above the connecting plate is fixed in the cage, and a second limit block located below the connecting plate is fixed in the cage. A plurality of vertical rods vertically and movably passing through the connecting plate are fixed between the first limit block and the second limit block. A first spring located between the connecting plate and the second limit block is sleeved on each vertical rod. In the natural state, the first spring is in a compressed state.

[0013] Optionally, a base plate is fixed on one side of the head protection soft pad close to the head clamping plate. A slider is fixed on one side of the base plate close to the head clamping plate. A through opening for the slider to slide back and forth is formed on the head clamping plate. A plurality of cross rods vertically and movably passing through the slider along the length direction of the cage are fixed in the through opening, and a second spring is sleeved on each cross rod.

[0014] Optionally, a telescopic rod is arranged between the slider and the cage. One end of the telescopic rod is fixed to the slider, and the other end of the telescopic rod is slidably connected to the cage. A pull rope is fixedly connected to the lower end of the rack. A plurality of guide wheels are rotatably connected in the cage through a wheel frame. The pull rope sequentially passes through each guide wheel and is fixedly connected to the telescopic rod. In the natural state, the pull rope is in a taut state. When the base plate moves towards the tail of the cage, the tops of the two upper jaw clamping plates approach each other.

[0015] Optionally, the mobile venous blood collection mechanism includes a fixed plate and a blood collection device. The fixed plate is fixed on the outer side of the cage and is inclined. The blood collection device is parallel to the fixed plate and is located on the right side of the neck of the minipig. A linear slide is installed on the fixed plate along the inclined direction of the fixed plate. A moving seat is fixed on the moving part of the linear slide. A barrel placement groove adapted to the barrel of the blood collection device is fixed on the moving seat. A piston handle placement groove adapted to the piston handle of the blood collection device slides on the moving seat. A cylinder for driving the piston handle placement groove to move along the length direction of the moving seat is installed in the moving seat.

[0016] Compared with the prior art, the present invention provides a blood collection device for miniature pigs used in animal medical experiments, having the following beneficial effects: 1. By providing a head clamping mechanism, a mouth clamping mechanism and a linkage drive mechanism, since the linkage drive mechanism can tighten the head clamping mechanism and at the same time move the mouth clamping mechanism upward, during the process of fixing the head of the miniature pig, the mouth of the miniature pig can be lifted synchronously, so that the head and neck of the miniature pig are raised, without causing damage to the head of the miniature pig and without affecting the fixing effect, which is beneficial to the blood collection work.

[0017] 2. By providing a rotating shaft, a gear and a rack, when the lower jaw support plate lifts the lower jaw of the miniature pig upward, the rotation of the rotating shaft can be driven through the cooperation of the rack and the gear, so as to drive the upper jaw clamping plate to rotate, thereby automatically clamping the mouth of the miniature pig. When the lower jaw support plate moves downward, the rotation of the rotating shaft can be driven through the cooperation of the rack and the gear, so as to drive the upper jaw clamping plate to rotate back, automatically loosening the mouth of the miniature pig.

[0018] 3. By providing a vertical rod, a first spring, a base plate, a slider, a cross bar, a second spring, a telescopic rod, a pull rope and each guide wheel, in the state where the miniature pig struggles not violently, the head of the miniature pig is clamped by the cooperation of the head clamping plate and the head protection soft pad; at the same time, the mouth of the miniature pig is clamped to a certain extent by the cooperation of the lower jaw support plate, the lower jaw protection soft pad, the upper jaw clamping plate and the upper jaw protection soft pad, and it is not easy to affect the breathing of the miniature pig.

[0019] In the state where the miniature pig struggles violently, when the head of the miniature pig moves back and forth, it will drive the head protection soft pad, the base plate, the slider and the telescopic rod to move synchronously, so as to drive the rack to move downward through the cooperation of the telescopic rod and the pull rope, and further drive the rotation of the rotating shaft through the cooperation of the rack and the gear, and further tighten the upper jaw clamping plate, so as to further clamp the mouth of the miniature pig and ensure the fixing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of a partial structure of the present invention; Figure 3 is a schematic diagram of the structure of the head clamping mechanism of the present invention; Figure 4 is a schematic diagram of the structure of the slider of the present invention; Figure 5 is a schematic diagram of the structure of the mouth clamping mechanism of the present invention; Figure 6 is a schematic diagram of the structure of the gear of the present invention; Figure 7Structural schematic diagram of the linkage drive mechanism of the present invention; Figure 8 Structural schematic diagram of the mobile venous blood collection mechanism of the present invention; Figure 9 Structural schematic diagram of the rack of the present invention; Figure 10 Structural schematic diagram of the pull rope of the present invention.

[0021] In the figure: 1, cage body; 2, torso clamping mechanism; 201, torso clamping plate; 202, hydraulic cylinder; 203, torso protection soft pad; 3, head clamping mechanism; 301, head clamping plate; 302, head protection soft pad; 4, mouth clamping mechanism; 401, lower jaw support plate; 402, lower jaw protection soft pad; 403, rotating shaft; 404, upper jaw clamping plate; 405, upper jaw protection soft pad; 5, linkage drive mechanism; 501, movable seat; 502, bidirectional lead screw; 503, servo motor; 504, guide rod; 505, lifting plate; 506, connecting frame; 507, linkage slide bar; 508, chute; 5081, first horizontal chute; 5082, inclined chute; 5083, second horizontal chute; 6, mobile venous blood collection mechanism; 601, fixed plate; 602, blood collector; 603, linear slide table; 604, moving seat; 605, barrel body placement groove; 606, piston handle placement groove; 607, air cylinder; 7, gear; 8, rack; 9, connecting plate; 10, first limit block; 11, second limit block; 12, vertical rod; 13, first spring; 14, base plate; 15, slider; 16, through hole; 17, cross bar; 18, second spring; 19, telescopic rod; 20, pull rope; 21, guide wheel. Detailed implementation manners

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Please refer to Figures 1 to 10, A small pig blood collection device for animal medical experiments, including a cage body 1. The two ends of the cage body 1 along its own length direction form a head and a tail respectively. The top surface and the tail of the cage body 1 are both open, which is convenient for driving the small pig into the cage body 1 and at the same time convenient for observing the small pig in the cage body 1. Inside the cage body 1, a torso clamping mechanism 2, a head clamping mechanism 3 and a mouth clamping mechanism 4 are sequentially arranged from the tail to the head along its own length direction. Through the cooperation of the torso clamping mechanism 2, the head clamping mechanism 3 and the mouth clamping mechanism 4, the torso, head and mouth of the small pig are fixed, reducing the struggle and movement of the small pig and ensuring the smooth progress of blood collection.

[0024] In this embodiment, a linkage drive mechanism 5 is arranged inside the head of the cage body 1. The linkage drive mechanism 5 is used to tighten the head clamping mechanism 3. When the head clamping mechanism 3 is tightened, it can synchronously drive the mouth clamping mechanism 4 to move upward. Therefore, during the process of fixing the head of the small pig, the mouth of the small pig can also be lifted synchronously, so that the head and neck of the small pig are raised, which will not cause damage to the head of the small pig and will not affect the fixing effect either, being beneficial to the progress of blood collection work. A mobile venous blood collection mechanism 6 is arranged outside the cage body 1. The mobile venous blood collection mechanism 6 is used for neck venous blood collection of the small pig with its head and neck raised.

[0025] The following is an introduction to the torso clamping mechanism 2: The torso clamping mechanism 2 includes torso clamping plates 201 movably arranged on the left and right sides inside the cage body 1. A number of hydraulic cylinders 202 are connected between the mutually remote sides of the two torso clamping plates 201 and the cage body 1. The two torso clamping plates 201 can be driven by the hydraulic cylinders 202 to approach each other, clamping and fixing the torso of the small pig, making it difficult for the small pig to move.

[0026] In order to avoid damaging the torso of the small pig during the clamping process, in this embodiment, torso protection soft pads 203 are fixedly connected to the mutually approaching sides of the two torso clamping plates 201, which can effectively avoid clamping the torso of the small pig. Each torso protection soft pad 203 and each torso clamping plate 201 are both arc-shaped, which is convenient for fitting with the torso of the small pig, thus improving the fixing effect.

[0027] The following is an introduction to the head clamping mechanism 3: The head clamping mechanism 3 includes head clamping plates 301 movably arranged on the left and right sides inside the cage body 1. Head protection soft pads 302 are movably arranged on the mutually approaching sides of the head clamping plates 301, which can avoid clamping the head of the small pig. When in use, the two head clamping plates 301 are driven by the linkage drive mechanism 5 to approach each other, and then the head of the small pig can be clamped and fixed.

[0028] The following is an introduction to the linkage drive mechanism 5: The linkage drive mechanism 5 includes movable seats 501 fixed to the tops of the respective head clamping plates 301; at the top of the cage body 1, a bidirectional lead screw 502 is rotatably connected through the cooperation of a bearing and a shaft seat. The bidirectional lead screw 502 is arranged along the width direction of the cage body 1 and is in screw fit with the respective movable seats 501. When the bidirectional lead screw 502 rotates, the two movable seats 501 can be driven to approach or move away from each other. A servo motor 503 for driving the bidirectional lead screw 502 to rotate is installed on the cage body 1; a plurality of guide rods 504 parallel to the bidirectional lead screw 502 are fixed on the cage body 1. Each guide rod 504 movably passes through each movable seat 501, and can guide the movable seat 501, so that the movable seat 501 can only move along the length direction of the bidirectional lead screw 502 and cannot rotate along with the bidirectional lead screw 502.

[0029] It should be added that the linkage drive mechanism 5 further includes a lifting plate 505 slidably moving vertically in the cage body 1. A connecting frame 506 is fixed between the bottom of the lifting plate 505 and the mouth clamping mechanism 4. When the lifting plate 505 moves up and down, the mouth clamping mechanism 4 can be driven to move up and down synchronously. A linkage slide rod 507 is fixed on one side of each movable seat 501 close to the lifting plate 505, and a chute 508 in one-to-one cooperation with each linkage slide rod 507 is formed on the lifting plate 505; when the two movable seats 501 approach or move away from each other, the linkage slide rod 507 can be driven to slide synchronously in the chute 508.

[0030] In this embodiment, the chute 508 includes a first horizontal groove 5081, an inclined groove 5082 inclined downward, and a second horizontal groove 5083 arranged in sequence along the moving direction of the movable seat 501. When the linkage slide rod 507 slides in the first horizontal groove 5081, the lifting plate 505 is located at the lowest position; when the linkage slide rod 507 slides in the inclined groove 5082, the lifting plate 505 can be driven to move up and down; when the linkage slide rod 507 slides in the second horizontal groove 5083, the lifting plate 505 is located at the highest position. The chute 508 adopts this structure, so that the lifting range of the mouth clamping mechanism 4 is limited, and the small pig will not be injured due to excessive rising, and at the same time, the moving range of the head clamping plate 301 is not affected.

[0031] After adopting the above structure, when the servo motor 503 works, the two movable seats 501 can be driven to approach each other, so as to drive the two head clamping plates 301 to approach each other and clamp and fix the head of the small pig; at the same time, in the process of the two movable seats 501 approaching each other, through the cooperation of the linkage slide rod 507 and the chute 508, the lifting plate 505 can be driven to move upward, so as to drive the mouth clamping mechanism 4 to move upward and make the head and neck of the small pig raise. Since the clamping of the head of the small pig and the raising of the head and neck are carried out synchronously, the head of the small pig will not be scratched, and at the same time, the fixing effect is ensured.

[0032] The following is an introduction to the mouth clamping mechanism 4: The mouth clamping mechanism 4 includes a lower jaw support plate 401 connected to the linkage drive mechanism 5. In this embodiment, the lower jaw support plate 401 is fixed to the connecting frame 506 in the linkage drive mechanism 5 and can move up and down with the lifting plate 505. The upper end surface of the lower jaw support plate 401 is inclined and arc-shaped, which is convenient for fitting with the lower jaw of the miniature pig, improving comfort and fixing effect; a lower jaw protective soft pad 402 is fixed on the upper end surface of the lower jaw support plate 401, which is not likely to cause damage to the lower jaw of the miniature pig. Rotating shafts 403 are respectively rotatably connected to the left and right sides of the lower jaw support plate 401, arc-shaped upper jaw clamping plates 404 are fixed on the respective rotating shafts 403, and upper jaw protective soft pads 405 are fixed on the respective upper jaw clamping plates 404 to avoid pinching the upper jaw of the miniature pig. During use, place the lower jaw of the miniature pig on the lower jaw support plate 401, and then rotate the upper jaw clamping plate 404 along the rotating shaft 403, so that the mouth of the miniature pig can be fixed through the cooperation of the upper jaw clamping plate 404 and the lower jaw support plate 401.

[0033] In order to enable the upper jaw clamping plate 404 to automatically tighten or expand when the lower jaw support plate 401 rises or falls, the following design is made: A gear 7 is fixedly sleeved on one end of each rotating shaft 403 away from the tail of the cage 1. A rack 8 meshing with each gear 7 is movably arranged in the cage 1. Each rack 8 is arranged in the vertical direction and is located between the two gears 7. A connecting plate 9 is fixed between the two racks 8; therefore, when the lower jaw support plate 401 moves upward, the rotating shaft 403 can be driven to rotate through the cooperation of the rack 8 and the gear 7, so as to automatically tighten the upper jaw clamping plate 404. When the lower jaw support plate 401 moves downward, the upper jaw clamping plate 404 can be automatically loosened through the cooperation of the rack 8 and the gear 7.

[0034] It is worth mentioning that a first limiting block 10 is fixed inside the cage body 1 above the connecting plate 9, and a second limiting block 11 is fixed inside the cage body 1 below the connecting plate 9. A plurality of vertical rods 12 are fixed between the first limiting block 10 and the second limiting block 11 and vertically pass through the connecting plate 9 movably, so that the connecting plate 9 can only move up and down. A first spring 13 is sleeved on each vertical rod 12 between the connecting plate 9 and the second limiting block 11; in the natural state, the first spring 13 is in a compressed state and can always apply an upward elastic force to the connecting plate 9. In the normal state, when the connecting plate 9 is not subjected to external force of the system, it can be attached to the first limiting block 10 under the action of the first spring 13, so that the rack 8 cannot move upward; therefore, when the lower jaw support plate 401 moves upward, since the rising range of the lower jaw support plate 401 is limited, through the cooperation of the rack 8 and the gear 7, the upper jaw clamping plate 404 can be tightened to a certain extent and then stop tightening, which is not likely to affect the breathing of the miniature pig. Under the action of an external force, when the rack 8 moves downward, the upper jaw clamping plate 404 can be further tightened through the cooperation of the rack 8 and the gear 7, thereby improving the fixing effect on the mouth of the miniature pig.

[0035] Since the head of the miniature pig is clamped from left and right, the head of the miniature pig is not likely to move left and right; and since the mouth of the miniature pig is clamped from up and down, the mouth of the miniature pig is not likely to move up and down. However, in order to avoid affecting the breathing of the miniature pig, only the mouth of the miniature pig can be clamped to a certain extent. Therefore, when the miniature pig struggles violently, especially when the head struggles back and forth, it is easy to break free backward from the head clamping mechanism 3 and the mouth clamping mechanism 4. To avoid this situation, the following design is made: A base plate 14 is fixed on one side of the head protection soft pad 302 close to the head clamping plate 301, and the base plate 14 can slide back and forth along the head clamping plate 301. A slider 15 is fixed on one side of the base plate 14 close to the head clamping plate 301, and a through hole 16 for the slider 15 to slide back and forth is formed in the head clamping plate 301, and the slider 15 can slide back and forth in the through hole 16. A plurality of cross rods 17 are fixed in the through hole 16 and vertically pass through the slider 15 along the length direction of the cage body 1, so that the slider 15 can only slide back and forth. A second spring 18 is sleeved on each cross rod 17, and the second spring 18 always applies a forward elastic force to the slider 15. When the slider 15 is not subjected to external force of the system, the slider 15 can be located at the initial position under the action of the second spring 18 and can only slide backward and cannot slide forward.

[0036] It should be added that a telescopic rod 19 is provided between the slider 15 and the cage body 1. One end of the telescopic rod 19 is fixed to the slider 15, and the other end of the telescopic rod 19 is slidably connected to the cage body 1. In this embodiment, a guide block is fixed to the end of the telescopic rod 19 away from the slider 15, and a guide groove for guiding the slider to slide back and forth along the length direction of the cage body 1 is provided in the cage body 1, so that the telescopic rod 19 can only move back and forth along the length direction of the cage body 1. At the same time, the telescopic rod 19 can be telescoped and will not affect the left and right movement of the head clamping plate 301. The lower end of the rack 8 is fixedly connected with a pull rope 20. A plurality of guide wheels 21 are rotatably connected in the cage body 1 through a wheel frame. The pull rope 20 passes through each guide wheel 21 in sequence and is fixedly connected to the telescopic rod 19. In the natural state, the pull rope 20 is in a taut state. When the substrate 14 moves toward the tail of the cage body 1, the tops of the two upper jaw clamping plates 404 approach each other.

[0037] With the above structure, when the head of the mini-pig is clamped and fixed by the head clamping plate 301, and at the same time, the cooperation of the lower jaw support plate 401 and the upper jaw clamping plate 404 is used to clamp and fix the mouth of the mini-pig to a certain extent. When the mini-pig struggles violently and drives the head protection soft pad 302 to move backward, the telescopic rod 19 can be driven to move backward through the substrate 14 and the slider 15, so as to drive the rack 8 to move downward through the pull rope 20, and then further tighten the upper jaw clamping plate 404 through the cooperation of the rack 8 and the gear 7, so as to improve the fixing effect on the mouth of the mini-pig and make it difficult for the mini-pig to break free from the head clamping mechanism 3 and the mouth clamping mechanism 4.

[0038] The following is an introduction to the mobile venous blood collection mechanism 6: The mobile venous blood collection mechanism 6 includes a fixing plate 601 and a blood collection device 602. In this embodiment, the blood collection device 602 is a disposable veterinary blood collection device, which mainly consists of a barrel body, a piston, a piston handle and a needle. The fixing plate 601 is fixed to the outside of the cage body 1 and is inclined. The blood collection device 602 is parallel to the fixing plate 601 and is located on the right side of the mini-pig's neck, so that the needle can be inserted obliquely into the right jugular vein (since the left side of the pig's neck is close to the phrenic nerve, it is advisable to collect blood from the right side).

[0039] A linear slide 603 is installed on the fixing plate 601 along the inclined direction of the fixing plate 601. A moving seat 604 is fixed on the moving part of the linear slide 603. A barrel body placement groove 605 adapted to the barrel body of the blood collection device 602 is fixed on the moving seat 604. A piston handle placement groove 606 adapted to the piston handle of the blood collection device 602 slides on the moving seat 604. A cylinder 607 for driving the piston handle placement groove 606 to move along the length direction of the moving seat 604 is installed in the moving seat 604.

[0040] With the above structure, after the miniature pig is fixed by the cooperation of the torso clamping mechanism 2, the head clamping mechanism 3 and the mouth clamping mechanism 4, and the head and neck of the miniature pig are lifted. The linear slide 603 drives the moving seat 604 to move, so that the needle of the blood collector 602 is obliquely inserted into the right jugular vein of the miniature pig; then the piston handle is driven to move by the cylinder 607, and the blood collection of the miniature pig can be carried out.

[0041] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent in such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0042] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A small pig blood collection device for animal medical experiments, comprising a cage (1), characterized in that: The cage body (1) has a head and a tail formed at both ends along its length direction, the top surface and the tail of the cage body (1) are both open, and a trunk clamping mechanism (2), a head clamping mechanism (3) and a mouth clamping mechanism (4) are arranged in sequence from the tail to the head in the cage body (1) along its length direction; A linkage drive mechanism (5) is provided on the inner side of the head of the cage body (1), and the linkage drive mechanism (5) is used to tighten the head clamping mechanism (3). When the head clamping mechanism (3) is tightened, the mouth clamping mechanism (4) can be synchronously driven to move upwards; A mobile venous blood sampling mechanism (6) is arranged on the outside of the cage body (1), and the mobile venous blood sampling mechanism (6) is used for sampling blood from the neck vein of a miniature pig with its head and neck raised.

2. A miniature pig blood collection device for animal medical experiments according to claim 1, characterized in that: The trunk clamping mechanism (2) comprises trunk clamping plates (201) movably arranged on the left and right sides of the cage (1), and a plurality of hydraulic cylinders (202) are connected between the cage (1) and the sides of the two trunk clamping plates (201) that are away from each other; A trunk protection cushion (203) is fixedly connected to one side of the two trunk clamping plates (201) that are close to each other, and each trunk protection cushion (203) and each trunk clamping plate (201) are arc-shaped.

3. The miniature pig blood collection device for animal medical experiments according to claim 1, characterized in that: The head clamping mechanism (3) comprises head clamping plates (301) movably arranged in the cage body (1) and located on the left and right sides, and a head protection cushion (302) is movably arranged on the side of each head clamping plate (301) close to each other.

4. The miniature pig blood collection device for animal medical experiments according to claim 3, characterized in that: The linkage drive mechanism (5) comprises a movable seat (501) fixed to the top of each head clamping plate (301); a bidirectional screw rod (502) is rotatably connected to the top of the cage body (1) through a bearing and a shaft seat, the bidirectional screw rod (502) is arranged along the width direction of the cage body (1) and is spirally matched with each movable seat (501), and a servo motor (503) for driving the bidirectional screw rod (502) to rotate is installed on the cage body (1); and a plurality of guide rods (504) parallel to the bidirectional screw rod (502) are fixed to the cage body (1), and each guide rod (504) movably passes through each movable seat (501).

5. A miniature pig blood collection device for animal medical experiments according to claim 4, characterized in that: The linkage drive mechanism (5) further comprises a lifting plate (505) that slides in the cage body (1) along a vertical direction, and a connecting frame (506) is fixed between the bottom of the lifting plate (505) and the mouth clamping mechanism (4); A linkage slide bar (507) is fixed on one side of each movable seat (501) close to the lifting plate (505), and a slide groove (508) is provided on the lifting plate (505) and matches each linkage slide bar (507) one by one. The slide groove (508) comprises a first transverse groove (5081), a downwardly inclined inclined groove (5082), and a second transverse groove (5083) which are arranged in sequence along the moving direction of the movable seat (501).

6. The miniature pig blood collection device for animal medical experiments according to claim 3, characterized in that: The mouth clamping mechanism (4) comprises a mandibular support plate (401) connected to the linkage drive mechanism (5); the upper end surface of the mandibular support plate (401) is inclined and arc-shaped, and a mandibular protective cushion (402) is fixed to the upper end surface of the mandibular support plate (401); Rotating shafts (403) are rotatably connected to the left and right sides of the mandibular support plate (401), respectively, and an arc-shaped maxillary clamping plate (404) is fixed on each rotating shaft (403), and a maxillary protective cushion (405) is fixed on each maxillary clamping plate (404).

7. A miniature pig blood collection device for animal medical experiments according to claim 6, characterized in that: A gear (7) is fixedly mounted on one end of each rotating shaft (403) away from the rear end of the cage (1); a rack (8) is movably arranged in the cage (1) and meshes with each gear (7) one by one; each rack (8) is arranged in a vertical direction and is located between two gears (7); a connecting plate (9) is fixed between the two racks (8); A first limit block (10) located above the connecting plate (9) is fixed in the cage body (1), and a second limit block (11) located below the connecting plate (9) is fixed in the cage body (1); a plurality of vertical rods (12) that move along the vertical direction and pass through the connecting plate (9) are fixed between the first limit block (10) and the second limit block (11); a first spring (13) located between the connecting plate (9) and the second limit block (11) is sleeved on each vertical rod (12); in a natural state, the first spring (13) is in a compressed state.

8. The miniature pig blood collection device for animal medical experiments according to claim 7, characterized in that: A base plate (14) is fixed to one side of the head protection cushion (302) close to the head clamping plate (301), a slider (15) is fixed to one side of the base plate (14) close to the head clamping plate (301), a through opening (16) for the slider (15) to slide forward and backward is provided on the head clamping plate (301), a plurality of cross bars (17) are fixed in the through opening (16) and are movable along the length direction of the cage body (1) and pass through the slider (15), and a second spring (18) is sleeved on each cross bar (17).

9. A miniature pig blood collection device for animal medical experiments according to claim 8, characterized in that: A telescopic rod (19) is provided between the slider (15) and the cage body (1), one end of the telescopic rod (19) is fixed to the slider (15), and the other end of the telescopic rod (19) is slidably connected to the cage body (1); A pull rope (20) is fixedly connected to the lower end of the rack (8); a plurality of guide wheels (21) are rotatably connected to the cage (1) via a wheel frame; the pull rope (20) passes through each guide wheel (21) in sequence and is fixedly connected to the telescopic rod (19); in a natural state, the pull rope (20) is in a straight state; when the base plate (14) moves toward the tail of the cage (1), the top ends of the two upper jaw clamping plates (404) approach each other.

10. The miniature pig blood collection device for animal medical experiments according to claim 1, characterized in that: The mobile venous blood sampling mechanism (6) comprises a fixing plate (601) and a blood collector (602), wherein the fixing plate (601) is fixed to the outside of the cage (1) and is arranged at an angle, and the blood collector (602) is parallel to the fixing plate (601) and is located on the right side of the neck of the miniature pig; A linear slide (603) is mounted on the fixed plate (601) and is arranged along the inclined direction of the fixed plate (601); a movable seat (604) is fixed on the moving part of the linear slide (603); a barrel placement groove (605) adapted to the barrel of the blood collector (602) is fixed on the movable seat (604); a piston handle placement groove (606) adapted to the piston handle of the blood collector (602) is slidably mounted on the movable seat (604); and a cylinder (607) for driving the piston handle placement groove (606) to move along the length direction of the movable seat (604) is mounted in the movable seat (604).

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