A pneumatic biological impactor for small rodents on the plateau

Abstract

The present invention discloses a pneumatic biological impact machine for small plateau rodents, which relates to the technical field of medical research instruments. It includes a base, a rodent restraint mechanism, an impact position rotation adjustment mechanism, an adjustable pneumatic impact mechanism and a biological impact component. A bracket is installed on the base. The rodent restraint mechanism includes a circular track. A height adjustment assembly is installed at the rear side of the bracket. The height adjustment assembly is fixedly connected to the front side of the circular track through two support rod frames. This pneumatic biological impact machine for small plateau rodents can stably restrain and fix the limbs of small rodents, and at the same time, the abdomen of small rodents is fully exposed. When causing trauma to small rodents by impact, it can keep small rodents in a forward position all the time, making the internal organs of small rodents in a normal position. The biological impact component impacts small rodents, and the obtained small rodent models have good consistency.

Description

Technical Field

[0001] The present invention relates to the technical field of medical research instruments, and specifically relates to a pneumatic biological impactor for small rodents on the plateau. Background Art

[0002] In the plateau field environment, it is inevitable that military soldiers suffer from abdominal impact injuries. Since there are important internal organs in the abdomen, once the organs are injured, it will cause great harm to the soldiers. Therefore, it is of great significance to study the treatment measures for abdominal trauma;

[0003] Generally, a small rodent biological impactor is used to impact the abdomen of small rodents, so as to obtain a small rodent model with impact injuries, and the treatment measures for human abdominal trauma are improved through the treatment research on the small rodent model;

[0004] The existing small rodent biological impactor impacts small rodents from top to bottom by means of a free-falling impact ball or a secondary striker under elastic force. At this time, when impacting different parts of small rodents, the small rodents need to be in different positions. However, for the internal organs of small rodents, the positions of the internal organs will also change in different positions, and the trauma conditions of the internal organs are different. At this time, there will be a large deviation in studying the treatment of human trauma through the small rodent model, and it is not easy to stably restrain small rodents during impact. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the existing defects, and provide a pneumatic biological impactor for small rodents on the plateau, which stably binds and fixes the limbs of small rodents. At the same time, the abdomen of small rodents is fully exposed, and it has good adaptability to the limb positions of small rodents. When impacting small rodents to cause trauma, the small rodents can always maintain a forward position, so that the internal organs of small rodents are in normal positions. Then, an adjustable pneumatic impact mechanism is used to launch a biological impact component at different angles to a specific position of small rodents, and the biological impact component impacts small rodents, causing small rodents to have acceleration trauma. Since small rodents always maintain a forward position, the positions of their internal organs are unified, and the obtained small rodent model has good consistency, which is more accurate for studying the treatment of human trauma and can effectively solve the problems in the background art.

[0006] To achieve the above object, the present invention provides the following technical solution: A pneumatic biological impactor for small rodents on the plateau, including a base, a bracket is installed on the base, and further includes:

[0007] Rodent restraint mechanism, comprising a circular track. A height adjustment component is installed at the rear side of the bracket. The height adjustment component is fixedly connected to the front side of the circular track through two support rod frames. A track groove is formed at the top of the circular track. Four track sliders are slidably connected in the track groove. Track locking components are respectively installed on the sides of each track slider. Adjusting sleeves are respectively fixedly connected to the tops of each track slider. Radial sliding rods are respectively slidably connected in each adjusting sleeve. Butterfly locking bolts are respectively threadedly connected to the tops of each adjusting sleeve. An animal leg restraint component is installed at one end of the radial sliding rod close to the center of the circular track;

[0008] Impact position rotation adjustment mechanism, installed on the top of the bracket, and the impact position rotation adjustment mechanism is connected to the front side of the impact angle adjustment mechanism through the impact distance adjustment mechanism;

[0009] Adjustable pneumatic impact mechanism, installed at the rear side of the impact angle adjustment mechanism;

[0010] Biological impact component, installed in the adjustable pneumatic impact mechanism.

[0011] Move the four track sliders along the track groove on the circular track so that the four track sliders are located at the four corners of a rectangle. Then lock the track sliders and the circular track with the track locking components, and the track sliders no longer move along the track groove on the circular track. Then loosen the butterfly locking bolts to allow the radial sliding rods to move along the adjusting sleeves, so that the four animal leg restraint components are respectively aligned with the limbs of the small rodent. Then tighten the butterfly locking bolts. The bottom of the butterfly locking bolt presses against the upper side of the radial sliding rod to fix the radial sliding rod and the adjusting sleeve together. The four animal leg restraint components restrain and fix the limbs of the small rodent, and at the same time keep the small rodent in a forward position. The height adjustment component is used to drive the support rod frame and the circular track to move up and down to adjust the height of the small rodent. The impact position rotation adjustment mechanism drives the impact distance adjustment mechanism to rotate, enabling the biological impact component to impact the small rodent in a forward position from different directions, such as from left to right, from bottom to top, from right to left, from top to bottom. The impact directions are variable and can be adjusted according to needs. The impact distance adjustment mechanism can change the distance between the adjustable pneumatic impact mechanism and the small rodent according to needs. The impact angle adjustment mechanism can enable the biological impact component to impact the small rodent at different inclination angles. The impact angles are variable and the application range is wide. Even if the impact position or the impact angle changes, the small rodent can be in a forward position, keeping the relative position of the internal organs of the small rodent unchanged. The consistency of the internal organ positions during impact is good, which is conducive to studying the impact of trauma on the internal organs.

[0012] Further, the animal leg restraint assembly includes a leg limiting ring. One end of the radial sliding rod close to the center of the circular track is fixedly connected to the leg limiting ring, and the bottom of one end of the radial sliding rod close to the center of the circular track is fixedly connected to the top of the leg support plate. A leg cushion is arranged on one side of the leg support plate close to the center of the circular track. One end of each of two rodent leg restraint straps is respectively connected to the side surface of the leg support plate. Hook-and-loop female strips are respectively arranged on one side of the two rodent leg restraint straps, and hook-and-loop male surfaces are respectively arranged at the other end portions of the two rodent leg restraint straps.

[0013] Pass the four limbs of the small rodent through the leg limiting ring from top to bottom respectively. Wind the rodent leg restraint straps around the leg support plate and the limbs of the small rodent. After winding tightly, stick the hook-and-loop male surface to the corresponding position on the hook-and-loop female strip to complete the restraint and fixation of the limbs of the small rodent. Each limb of the small rodent is restrained and fixed by two rodent leg restraint straps, with stable restraint. An adaptation groove matching the limbs of the small rodent is arranged on the side surface of the leg cushion, and the leg cushion is made of a rubber pad. The leg cushion supports the limbs of the small rodent, which can reduce the discomfort of the small rodent and is beneficial for the small rodent to cooperate with the experiment.

[0014] Further, the adjustable pneumatic impact mechanism includes an impact guiding cylinder. A horizontal impact guiding cylinder is installed at the rear side of the impact angle adjustment mechanism. A round plug plate is slidably connected in the impact guiding cylinder. The left end of an adjustment air pipe is fixedly connected to the middle part on the right side of the round plug plate. A trigger air hole is opened in the middle of the round plug plate. The adjustment air pipe is slidably connected to the middle part at the right end of the impact guiding cylinder, and the right end of the adjustment air pipe is connected to a pneumatic impact stroke adjustment component.

[0015] The pneumatic impact stroke adjustment component is used to drive the adjustment air pipe and the round plug plate to move left and right relative to the impact guiding cylinder. The end of the impact guiding cylinder is aligned with the position to be impacted on the small rodent. Inflate into the impact guiding cylinder through the adjustment air pipe and the trigger air hole. The air pressure pushes the biological impact component to be quickly launched to the right in the impact guiding cylinder. The biological impact component quickly flies out and impacts the small rodent, and a trauma with acceleration can be obtained. When the pneumatic impact stroke adjustment component drives the round plug plate and the adjustment air pipe to move left, the stroke of the biological impact component being excited in the impact guiding cylinder becomes shorter, the kinetic energy obtained by the biological impact component becomes smaller, and the impact force on the small rodent becomes smaller. When the pneumatic impact stroke adjustment component drives the round plug plate and the adjustment air pipe to move right, the stroke of the biological impact component being excited in the impact guiding cylinder becomes longer, the kinetic energy obtained by the biological impact component becomes larger, and the impact force on the small rodent becomes larger. It can change the impact force on the small rodent as needed to obtain trauma models of different degrees.

[0016] Further, the biological impact component includes an impact power column, an iron disc, a stud, and an impact end head. The impact power column is slidably connected within the impact guiding cylinder. The iron disc is detachably installed at the right end of the impact power column. A magnet is installed in the groove on the left side of the circular plug plate. The middle of the left end of the impact power column is fixedly connected to a stud, and the stud is threadedly connected to the impact end head. The impact power column is inserted into the impact guiding cylinder, and the iron disc at the end of the impact power column is adsorbed by the magnet. At this time, even if the impact position rotation adjustment mechanism drives the impact guiding cylinder to rotate so that the port of the impact guiding cylinder faces downward, the impact power column will not fall from the port of the impact guiding cylinder due to gravity. By adjusting the air pipe and the trigger air hole to inflate the impact guiding cylinder, the air pressure between the circular plug plate and the iron disc in the impact guiding cylinder increases, overcoming the magnetic attraction of the magnet on the iron disc, and pushing the impact power column to be launched from the impact guiding cylinder. The impact end head at the end of the impact power column impacts a small rodent, obtaining a small rodent model with trauma. With the cooperation of the stud and the impact end head, different impact end heads can be replaced. The end of the impact end head away from the impact power column is generally set as a conical end, and impact end heads with different tapers can be replaced according to needs.

[0017] Further, it further includes an impact air supply mechanism. The impact air supply mechanism includes an impact air pipe, a valve support, a ball valve, a flexible air pipe, a solenoid valve, an air tank, an air pump, and an air supply pipe. The bottom of the left end of the impact guiding cylinder is fixedly connected to the rear end of the valve support. The front end of the valve support is fixedly connected to a ball valve. One end of the ball valve is connected to the right end of the adjustment air pipe through the impact air pipe. The other end of the ball valve is connected to one end of the solenoid valve through the flexible air pipe. The other end of the solenoid valve is installed at the air outlet of the air tank. The air inlet of the air tank is connected to the outlet of the air pump through the air supply pipe. The air pump pumps air into the air tank through the air supply pipe to keep a certain air pressure level in the air tank. A pressure gauge can be set on the air tank to facilitate observing whether the air pressure in the air tank reaches the requirement. In order to keep a stable air pressure in the air tank, a one-way valve can be set at the end of the air supply pipe, allowing only the air supply pipe to send air into the air tank, and the gas in the air supply pipe will not flow backward. When it is necessary to launch the biological impact component, the solenoid valve and the ball valve are opened, and the gas in the air tank enters the adjustment air pipe through the flexible air pipe and the impact air pipe, and then enters the impact guiding cylinder, and the biological impact component is launched from the impact guiding cylinder through the air pressure. After the air pressure in the air tank decreases, the air pump can be controlled to work to supplement it.

[0018] Further, it further includes a ball valve follow-up closing mechanism, and the ball valve follow-up closing mechanism includes a longitudinal sliding sleeve, a follow-up plate, a guiding inclined surface, a rack and a gear. A longitudinal sliding sleeve is arranged on the front side of the left end of the impact guiding cylinder. A follow-up plate is longitudinally slidably connected inside the longitudinal sliding sleeve. The rear end of the follow-up plate extends into the impact guiding cylinder, and a guiding inclined surface is arranged on the right side of the rear end of the follow-up plate. A longitudinal rack is fixedly connected to the front end of the follow-up plate. A gear is installed on the valve stem at the top of the ball valve, and the gear is meshed with the rack. After the biological impact component is launched, the gas in the gas tank will continue to discharge air through the solenoid valve, the ball valve and the relevant air pipes. Generally, it cannot be closed in time to reduce the air pressure loss in the gas tank, so the air pump needs to work more, wasting electric energy. Therefore, a ball valve follow-up closing mechanism is set up to immediately close the ball valve after the biological impact component is launched, reducing the air pressure loss in the gas tank. During specific use, the end of the follow-up plate with the guiding inclined surface extends into the impact guiding cylinder. When the biological impact component is launched from the port of the impact guiding cylinder, the impact end first contacts the guiding inclined surface, and then frictional contact is made with the guiding inclined surface. With the oblique guiding action of the guiding inclined surface, the follow-up plate is pushed out from the outer end of the longitudinal sliding sleeve, and then the rack is driven to move. Due to the meshing effect between the gear and the rack, the linear motion of the rack is converted into the circular motion of the gear, and the gear drives the valve stem at the top of the ball valve to rotate 90 degrees to close the ball valve. Subsequently, the solenoid valve can be closed by the staff. After adding the ball valve follow-up closing mechanism, the ball valve is closed every time the biological impact component is launched to the port of the impact guiding cylinder, which can reduce the waste of air pressure in the gas tank and reduce the working time of the air pump. Next time it is used, the follow-up plate is pushed back into the longitudinal sliding sleeve again, the rack moves in the reverse direction, driving the gear to rotate 90 degrees in the reverse direction, and the ball valve is reopened, and then it can wait for the next use.

[0019] Further, the ball valve follow-up closing mechanism further includes a limiting bent rod and a limiting convex plate. A limiting convex plate is arranged on the top of the front end of the follow-up plate. The limiting bent rod is fixedly connected to the side surface of the longitudinal sliding sleeve, and the front end of the limiting bent rod is located in front of the side of the rack. Every time the follow-up plate is pushed into the longitudinal sliding sleeve, the limiting convex plate will stop due to the interference of the end of the longitudinal sliding sleeve. When the follow-up plate is pushed out of the longitudinal sliding sleeve by the impact end, the rack end stops when it touches the limiting bent rod. The limiting bent rod and the limiting convex plate limit the movement range of the rack. When the rack moves within the movement range, it can drive the gear to rotate within a 90-degree range, and can stably open or close the ball valve.

[0020] Further, the impact position rotation adjustment mechanism includes a rotation shaft, a hollow rotation rod, a positioning ring, and a rotation locking component. The left end of the hollow rotation rod is movably connected to the top of the bracket through the longitudinal rotation shaft. A positioning ring is installed on the front side of the bracket, and the center of the positioning ring coincides with the axis of the rotation shaft. The hollow rotation rod is connected to the positioning ring through the rotation locking component. The hollow rotation rod can rotate 360 degrees relative to the top of the bracket through the rotation shaft, so as to change the direction of the impact guiding cylinder towards the small rodent. The rotation locking component cooperates with the positioning ring to fix the position of the hollow rotation rod.

[0021] Further, the impact distance adjustment mechanism includes a hollow adjustment slide rod and an extension control component. The inner side of the end of the hollow rotation rod away from the rotation shaft is slidably connected with the hollow adjustment slide rod, and the hollow rotation rod is connected to the hollow adjustment slide rod through the extension control component. The extension control component is used to control the hollow adjustment slide rod to extend or retract into the hollow rotation rod, so as to change the length of the cantilever formed by the hollow adjustment slide rod and the hollow rotation rod, and thus control the distance between the port of the impact guiding cylinder and the small rodent.

[0022] Further, the impact angle adjustment mechanism includes a support disc. The rear side of the right end of the hollow adjustment slide rod is fixedly connected to the front side of the support disc. The middle part of the support disc is rotatably connected to an adjustment shaft. The bottom of the adjustment shaft is fixedly connected to the middle part of a turntable. The rear side of the turntable is fixedly connected to the impact guiding cylinder through two connecting frames. An arc groove is opened on the support disc, and the center of the circle where the arc groove is located coincides with the axis of the adjustment shaft. A plurality of card slots are equiangularly opened on the outer side of the arc groove. A radial sliding groove is opened on the turntable, and a slider is slidably connected in the radial sliding groove. One end of the radial sliding groove close to the adjustment shaft is connected to the slider through a compression spring. The top of the slider is fixedly connected to the bottom end of a clamping post, and the top of the clamping post passes through the arc groove. The elastic force of the compression spring pushes the slider along the radial sliding groove away from the adjustment shaft, so that the clamping post is clamped with the corresponding card slot.

[0023] Pulling the clamping post towards the adjustment shaft can drive the slider to move towards the adjustment shaft. At this time, the compression spring is compressed, and the clamping post leaves the card slot. At this time, rotating the turntable relative to the support disc through the adjustment shaft can change the angle between the impact guiding cylinder and the small rodent. Then release the clamping post, and the compression spring returns and elongates, pushing the slider away from the adjustment shaft again, so that the clamping post is re-clamped with the corresponding card slot, realizing the re-fixation of the turntable and the support disc. Thus, the impact angle on the small rodent can be quickly changed.

[0024] Compared with the prior art, the beneficial effects of the pneumatic biological impact machine for plateau small rodents are as follows:

[0025] 1. Pass the limbs of the small rodent through the leg limiting rings from top to bottom respectively. Wrap the rodent leg restraint around the leg support plate and the limbs of the small rodent. After wrapping tightly, stick the male side of the Velcro to the corresponding position on the female side strip of the Velcro to complete the restraint and fixation of the limbs of the small rodent. Each limb of the small rodent is restrained and fixed by two rodent leg restraints, with stable restraint. The side of the leg pad is provided with an adaptation groove that matches the limbs of the small rodent. The leg pad supports the limbs of the small rodent, which can reduce the discomfort of the small rodent and is conducive to the small rodent's cooperation in the experiment.

[0026] 2. Align the end of the impact guiding cylinder with the position of the small rodent to be impacted. Inflate the impact guiding cylinder by adjusting the air pipe and the trigger air hole. The air pressure pushes the biological impact component to quickly launch to the right in the impact guiding cylinder. The biological impact component quickly flies out and impacts the small rodent, and a trauma with acceleration can be obtained. The pneumatic impact stroke adjustment component drives the round plug plate and the adjustment air pipe to move leftward, then the stroke of the biological impact component excited in the impact guiding cylinder becomes shorter, the kinetic energy obtained by the biological impact component becomes smaller, and the impact force on the small rodent becomes smaller. The pneumatic impact stroke adjustment component drives the round plug plate and the adjustment air pipe to move rightward, the stroke of the biological impact component excited in the impact guiding cylinder becomes longer, the kinetic energy obtained by the biological impact component becomes larger, and the impact force on the small rodent becomes larger. It can change the impact force on the small rodent according to needs and obtain trauma models of different degrees.

[0027] 3. The impact position rotation adjustment mechanism drives the impact distance adjustment mechanism to rotate, enabling the biological impact component to impact the small rodent in the forward position from different directions, such as from left to right, from bottom to top, from right to left, and from top to bottom. The impact directions are variable and can be adjusted according to needs. The impact distance adjustment mechanism can change the distance between the impact guiding cylinder and the small rodent according to needs. The impact angle adjustment mechanism enables the biological impact component to impact the small rodent at different inclined angles. The impact angles are variable and the application range is wide. Even if the impact position or impact angle changes, the small rodent can be in the forward position, keeping the relative position of the internal organs of the small rodent unchanged. The consistency of the internal organ position during impact is good, which is conducive to studying the impact of trauma on the internal organs.

[0028] 4. One end of the follower plate with a guiding inclined surface extends into the impact guiding cylinder. When the biological impact component is launched from the port of the impact guiding cylinder, the impact end first contacts the guiding inclined surface, then frictionally contacts the guiding inclined surface, and under the oblique guiding action of the guiding inclined surface, the follower plate is pushed to extend from the outer end of the longitudinal sliding sleeve, and then drives the rack to move. Due to the meshing action between the gear and the rack, the linear motion of the rack is converted into the circular motion of the gear, and the gear drives the valve stem at the top of the ball valve to rotate 90 degrees to close the ball valve. Subsequently, the solenoid valve can be closed by the staff. After adding the follow-up closing mechanism of the ball valve, the ball valve is closed every time the biological impact component is launched to the port of the impact guiding cylinder, which can reduce the waste of the air pressure in the air tank and reduce the working time of the air pump.

[0029] 5. The four limbs of the small rodent are stably bound and fixed, and at the same time, the abdomen of the small rodent is fully exposed. It has good adaptability to the positions of the four limbs of the small rodent. When causing trauma to the small rodent by impact, the small rodent can always maintain a forward body position, so that the internal organs of the small rodent are in a normal position. Then, the adjustable pneumatic impact mechanism is used to launch the biological impact component at different angles towards the specific position of the small rodent. The biological impact component impacts the small rodent, causing the small rodent to have acceleration trauma. Since the small rodent always maintains a forward body position and its internal organ positions are unified, the obtained small rodent model has good consistency and is more accurate for studying the treatment of human trauma. Brief Description of the Drawings

[0030] Figure 1 Structural schematic diagram of the pneumatic biological impact machine for small rodents on the plateau according to the present invention;

[0031] Figure 2 For the present invention Figure 1 Partial enlarged structural schematic diagram at A in the figure;

[0032] Figure 3 Rear structural schematic diagram of the pneumatic biological impact machine for small rodents on the plateau according to the present invention;

[0033] Figure 4 Structural schematic diagram of the rodent restraint mechanism in the pneumatic biological impact machine for small rodents on the plateau according to the present invention;

[0034] Figure 5 Partial structural schematic diagram of the rodent restraint mechanism in the pneumatic biological impact machine for small rodents on the plateau according to the present invention;

[0035] Figure 6 For the present invention Figure 5 Rear structural schematic diagram;

[0036] Figure 7Schematic diagram of the partial structure of the pneumatic biological impactor for small rodents on the plateau of the present invention Figure One ;

[0037] Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged partial structure at position B in the present invention;

[0038] Figure 9 Schematic diagram of the partial structure of the pneumatic biological impactor for small rodents on the plateau of the present invention Figure Two ;

[0039] Figure 10 Schematic diagram of the partial sectional structure of the adjustable pneumatic impact mechanism in the pneumatic biological impactor for small rodents on the plateau of the present invention;

[0040] Figure 11 For the present invention Figure 10 Schematic diagram of the enlarged partial structure at position C in the present invention;

[0041] Figure 12 Schematic diagram of the sectional structure of the impact distance adjustment mechanism in the pneumatic biological impactor for small rodents on the plateau of the present invention;

[0042] In the figure: 1 base, 2 impact position rotation adjustment mechanism, 21 rotation shaft, 22 hollow rotating rod, 23 positioning ring, 24 positioning hole, 25 telescopic rod, 26 tension spring, 27 connecting rod, 28 positioning column, 3 impact distance adjustment mechanism, 31 hollow adjustment slide rod, 32 lead screw nut one, 33 lead screw one, 34 adjustment handwheel one, 4 rodent restraint mechanism, 41 support plate, 42 column, 43 adjustment plate, 44 fastening bolt one, 45 support bracket, 46 circular track, 47 track groove, 48 arc friction groove, 49 radial slide rod, 410 track slider, 411 support ring, 412 locking column, 413 lifting ring, 414 locking spring, 415 locking friction block, 416 adjustment sleeve, 417 butterfly locking bolt, 418 leg support plate, 419 leg limit ring, 420 leg pad, 421 rodent leg restraint belt, 422 magic tape female strip, 423 magic tape male surface, 5 impact angle adjustment mechanism, 51 support disc, 52 adjustment shaft, 53 arc groove, 54 card slot, 55 turntable, 56 card column, 57 slider, 58 compression spring, 59 connecting frame, 6 adjustable pneumatic impact mechanism, 61 impact guide cylinder, 62 round plug plate, 63 adjustment air pipe, 64 trigger air hole, 65 magnet, 66 bent frame, 67 lead screw nut two, 68 convex block, 69 lead screw two, 610 adjustment handwheel two, 7 impact air supply mechanism, 71 impact air pipe, 72 valve bracket, 73 ball valve, 74 soft air pipe, 75 solenoid valve, 76 air tank, 77 air pump, 78 air supply pipe, 8 ball valve follow-up closing mechanism, 81 longitudinal sliding sleeve, 82 follow-up plate, 83 guiding inclined plane, 84 rack, 85 gear, 86 limiting bent rod, 87 limiting convex plate, 9 biological impact component, 91 impact power column, 92 iron plate, 93 convex column, 94 stud, 95 impact end, 10 bracket. Detailed implementation mode

[0043] 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.

[0044] Example 1, please refer to Figures 1 to 12 , this embodiment provides a technical solution: a pneumatic biological impact machine for small rodents on the plateau, including a base 1, a bracket 10 is installed on the base 1, and further includes an impact position rotation adjustment mechanism 2, a rodent restraint mechanism 4, an adjustable pneumatic impact mechanism 6 and a biological impact component 9.

[0045] The rodent restraint mechanism 4 includes a height adjustment component, a support rod frame 45, a circular track 46, a track groove 47, a radial sliding rod 49, a track slider 410, an adjustment sleeve 416, a butterfly locking bolt 417, a track locking component, and an animal leg restraint component. The height adjustment component is installed at the rear side of the bracket 10. The height adjustment component is fixedly connected to the front side of the circular track 46 through two support rod frames 45. A notch is provided in the part of the circular track 46 between the two support rod frames 45. The notch is provided to facilitate the installation of the track slider 410 into the track groove 47. A track groove 47 is formed at the top of the circular track 46. Four track sliders 410 are slidably connected in the track groove 47. A track locking component is respectively installed on the side surface of each track slider 410. An adjustment sleeve 416 is respectively fixedly connected to the top of each track slider 410. A radial sliding rod 49 is respectively slidably connected in each adjustment sleeve 416. A butterfly locking bolt 417 is respectively threadedly connected to the top of each adjustment sleeve 416. The radial sliding rods 49 are distributed along the radial direction of the circle where the circular track 46 is located. An animal leg restraint component is installed at one end of the radial sliding rod 49 close to the center of the circular track 46.

[0046] Move the four track sliders 410 along the track groove 47 on the circular track 46 to make the four track sliders 410 located at the four corners of a rectangle. Then lock the track sliders 410 and the circular track 46 with the help of the track locking component, so that the track sliders 410 no longer move along the track groove 47 on the circular track 46. Then loosen the butterfly locking bolt 417 to make the radial sliding rod 49 move along the adjustment sleeve 416, so that the four animal leg restraint components respectively align with the four limbs of the small rodent. Then tighten the butterfly locking bolt 417. The bottom of the butterfly locking bolt 417 abuts against the upper side of the radial sliding rod 49 to fix the radial sliding rod 49 and the adjustment sleeve 416 together. The four animal leg restraint components restrain and fix the four limbs of the small rodent, and at the same time keep the small rodent in a forward position. The height adjustment component is used to drive the support rod frame 45 and the circular track 46 to move up and down to adjust the height of the small rodent.

[0047] The animal leg restraint assembly includes a leg support plate 418, a leg limiting ring 419, a leg cushion 420, a rodent leg restraint strap 421, a hook-and-loop female strip 422, and a hook-and-loop male surface 423. One end of the radial sliding rod 49 close to the center of the circular track 46 is fixedly connected to the leg limiting ring 419, and the bottom of one end of the radial sliding rod 49 close to the center of the circular track 46 is fixedly connected to the top of the leg support plate 418. A leg cushion 420 is arranged on one side of the leg support plate 418 close to the center of the circular track 46. One end of two rodent leg restraint straps 421 is respectively connected to the side surface of each leg support plate 418. A hook-and-loop female strip 422 is arranged on one side of the two rodent leg restraint straps 421, and a hook-and-loop male surface 423 is respectively arranged at the other end of the two rodent leg restraint straps 421. The hook-and-loop female strip 422 and the hook-and-loop male surface 423 both adopt the prior art.

[0048] Respectively pass the four limbs of the small rodent through the leg limiting ring 419 from top to bottom, wind the rodent leg restraint strap 421 around the leg support plate 418 and the limb of the small rodent. After winding tightly, stick the hook-and-loop male surface 423 to the corresponding position on the hook-and-loop female strip 422 to complete the restraint and fixation of the limb of the small rodent. Each limb of the small rodent is restrained and fixed by two rodent leg restraint straps 421, and the restraint is stable. An adaptation groove matching the limb of the small rodent is arranged on the side surface of the leg cushion 420, and the leg cushion 420 adopts a rubber pad. The leg cushion 420 supports the limb of the small rodent, can reduce the discomfort of the small rodent, and is beneficial for the small rodent to cooperate with the experiment.

[0049] Specifically, the height adjustment assembly includes a support plate 41, a column 42, an adjustment plate 43, and a first fastening bolt 44. The rear side of the bracket 10 is fixedly connected to the support plate 41. The left and right ends of the support plate 41 are respectively fixedly connected to the bottom ends of the two columns 42. The two columns 42 are respectively slidably connected to two column holes on the adjustment plate 43. A first fastening bolt 44 is threadedly connected to the position of the adjustment plate 43 corresponding to the column 42, and the first fastening bolt 44 abuts against the column 42. The front ends of two support rod frames 45 are fixedly connected to the rear side of the adjustment plate 43. When it is necessary to adjust the height of the adjustment plate 43, turn the first fastening bolt 44, and the first fastening bolt 44 leaves the column 42, driving the adjustment plate 43 to move up and down relative to the column 42. After the height of the adjustment plate 43 is adjusted, turn the first fastening bolt 44 again, and the first fastening bolt 44 abuts against the column 42 again to realize the adjustment of the height of the support rod frame 45 and the circular track 46.

[0050] The track locking assembly includes an arc friction groove 48, a support ring 411, a locking column 412, a lifting ring 413, a locking spring 414, and a locking friction block 415. The bottom of the track groove 47 is provided with an arc friction groove 48, and the bottom of the arc friction groove 48 is provided with friction lines. The end of each track slider 410 is fixedly connected with a support ring 411, and a locking column 412 is vertically slidably connected in the support ring 411. The bottom end of the locking column 412 is fixedly connected with a locking friction block 415, and the top of the locking column 412 is fixedly connected with a lifting ring 413. The column section of the locking column 412 located between the support ring 411 and the locking friction block 415 is sleeved with a locking spring 414. The elastic force of the locking spring 414 pushes the locking column 412 and the locking friction block 415 to move downward relative to the support ring 411, and the bottom end of the locking friction block 415 extends The locking block 415 is inserted into the circular arc friction groove 48, and the relative position of the track slider 410 and the circular track 46 is locked by means of the friction force between the locking friction block 415 and the friction lines in the circular arc friction groove 48. When the track slider 410 needs to slide along the track groove 47 to adjust the position, the locking column 412 is lifted with the help of the lifting ring 413, the locking spring 414 is compressed, and the bottom of the locking friction block 415 leaves the circular arc friction groove 48, at this time, the track slider 410 is driven to move along the track groove 47. After the track slider 410 moves to the required position, the lifting ring 413 is released, and the elastic force of the locking spring 414 pushes the locking column 412 and the locking friction block 415 to move downward relative to the support ring 411, and the bottom of the locking friction block 415 is frictionally contacted with the friction lines in the circular arc friction groove 48 again, so that the track slider 410 and the circular track 46 are locked together.

[0051] The impact position rotation adjustment mechanism 2 is installed on the top of the bracket 10, and the impact position rotation adjustment mechanism 2 is connected to the front side of the impact angle adjustment mechanism 5 through the impact distance adjustment mechanism 3;

[0052] The adjustable pneumatic impact mechanism 6 includes an impact guide tube 61, a round plug plate 62, an adjustment air pipe 63, a trigger air hole 64 and a pneumatic impact stroke adjustment component. A horizontal impact guide tube 61 is installed on the rear side of the impact angle adjustment mechanism 5. A round plug plate 62 is slidably connected in the impact guide tube 61. The middle part of the right side of the round plug plate 62 is fixedly connected to the left end of the adjustment air pipe 63. The adjustment air pipe 63 is an iron air pipe. A trigger air hole 64 connected to the left end of the adjustment air pipe 63 is opened in the middle part of the round plug plate 62. The adjustment air pipe 63 is slidably connected to the middle part of the right end of the impact guide tube 61, and the right end of the adjustment air pipe 63 is connected to the pneumatic impact stroke adjustment component. The pneumatic impact stroke adjustment component is used to control the adjustment air pipe 63 and the round plug plate 62 to move left and right relative to the impact guide tube 61.

[0053] The pneumatic impact stroke adjustment assembly includes a bent frame 66, a second lead screw nut 67, a convex block 68, a second lead screw 69, and a second adjustment handwheel 610. Two convex blocks 68 are provided on the impact guide cylinder 61. A second lead screw 69 is rotatably connected between the two convex blocks 68. One end of the second lead screw 69 is fixedly connected to the second adjustment handwheel 610. The second lead screw 69 is in mating connection with the second lead screw nut 67. The second lead screw nut 67 is fixedly connected to the right end of the adjustment air pipe 63 through the bent frame 66. By rotating the second adjustment handwheel 610 clockwise, the second lead screw 69 drives the bent frame 66 and the adjustment air pipe 63 to move rightward through the thread action between the second lead screw 69 and the second lead screw nut 67, thereby driving the round plug plate 62 to move rightward in the impact guide cylinder 61. By rotating the second adjustment handwheel 610 counterclockwise, the second lead screw 69 drives the bent frame 66 and the adjustment air pipe 63 to move leftward through the thread action between the second lead screw 69 and the second lead screw nut 67, thereby driving the round plug plate 62 to move leftward in the impact guide cylinder 61.

[0054] The rotation adjustment mechanism 2 for the impact position includes a rotation shaft 21, a hollow rotating rod 22, a positioning ring 23, and a rotation locking assembly. The left end of the hollow rotating rod 22 is movably connected to the top of the bracket 10 through the longitudinal rotation shaft 21. A positioning ring 23 is installed on the front side of the bracket 10. The center of the positioning ring 23 coincides with the axis of the rotation shaft 21. The hollow rotating rod 22 is connected to the positioning ring 23 through the rotation locking assembly. The hollow rotating rod 22 can rotate 360 degrees relative to the top of the bracket 10 through the rotation shaft 21, so as to change the direction of the impact guide cylinder 61 facing the small rodent. The rotation locking assembly cooperates with the positioning ring 23 to fix the position of the hollow rotating rod 22.

[0055] The rotation locking assembly includes a positioning hole 24, a telescopic rod 25, a tension spring 26, a connecting rod 27, and a positioning post 28. A plurality of positioning holes 24 are annularly arrayed on the front side of the positioning ring 23. The specific number of the positioning holes 24 is selected according to needs. The front side of the right end of the hollow rotating rod 22 is fixedly connected to the rear end of the telescopic rod 25. The front end of the telescopic rod 25 is fixedly connected to the longitudinal positioning post 28 through the connecting rod 27. A tension spring 26 is sleeved on the telescopic rod 25. The two ends of the tension spring 26 are respectively fixedly connected to the hollow rotating rod 22 and the connecting rod 27. The pulling force of the tension spring 26 shortens the telescopic rod 25, thereby driving the connecting rod 27 to approach the positioning ring 23, so that the positioning post 28 is clamped with the corresponding positioning hole 24, realizing the locking of the positioning ring 23 and the hollow rotating rod 22, fixing the position of the hollow rotating rod 22, and preventing the two ends of the telescopic rod 25 from rotating relative to each other, avoiding the rotation of the positioning post 28 relative to the hollow rotating rod 22. When it is necessary to rotate the hollow rotating rod 22, pull the connecting rod 27 forward, the rear end of the positioning post 28 disengages from the positioning hole 24, the telescopic rod 25 extends, and the tension spring 26 is stretched. Then rotate the hollow rotating rod 22 to the required position, and then release the connecting rod 27. The pulling force of the tension spring 26 makes the telescopic rod 25 shorten again, and the positioning post 28 is clamped with the newly corresponding positioning hole 24, thus completing the re-fixing of the hollow rotating rod 22 after rotation.

[0056] The impact distance adjustment mechanism 3 includes a hollow adjustment slide rod 31 and an extension control component. The inner side of one end of the hollow rotating rod 22 far from the rotating shaft 21 is slidably connected with the hollow adjustment slide rod 31, and the hollow rotating rod 22 is connected to the hollow adjustment slide rod 31 through the extension control component. The extension control component is used to control the hollow adjustment slide rod 31 to extend or retract into the hollow rotating rod 22, thereby changing the length of the cantilever formed by the hollow adjustment slide rod 31 and the hollow rotating rod 22, and thus controlling the distance between the port of the impact guiding cylinder 61 and the small rodent.

[0057] The extension control component includes a lead screw nut 32, a lead screw 33, and an adjustment handwheel 34. The left end of the hollow rotating rod 22 is rotatably connected to the left end of the lead screw 33 through a bearing. The left end of the lead screw 33 extends out of the hollow rotating rod 22 and is fixedly connected with an adjustment handwheel 34. One end of the hollow adjustment slide rod 31 located inside the hollow rotating rod 22 is fixedly connected with a lead screw nut 32. The lead screw nut 32 is in mating connection with the lead screw 33. By rotating the lead screw 33 clockwise with the adjustment handwheel 34, the threaded action of the lead screw 33 and the lead screw nut 32 makes the hollow adjustment slide rod 31 extend out of the hollow rotating rod 22. By rotating the lead screw 33 counterclockwise with the adjustment handwheel 34, the threaded action of the lead screw 33 and the lead screw nut 32 makes the hollow adjustment slide rod 31 retract into the hollow rotating rod 22.

[0058] The impact angle adjustment mechanism 5 includes a support disc 51, an adjustment shaft 52, an arc groove 53, a card slot 54, a turntable 55, a card post 56, a slider 57, a compression spring 58 and a connecting frame 59. The rear side of the right end of the hollow adjustment slide rod 31 is fixedly connected to the front side of the support disc 51. The middle of the support disc 51 is rotatably connected to the adjustment shaft 52. The bottom of the adjustment shaft 52 is fixedly connected to the middle of the turntable 55. The rear side of the turntable 55 is fixedly connected to the impact guiding cylinder 61 through two connecting frames 59. An arc groove 53 is provided on the support disc 51. The center of the circle where the arc groove 53 is located coincides with the axis of the adjustment shaft 52. A plurality of card slots 54 are equiangularly provided on the outer side of the arc groove 53. The number of card slots 54 is selected according to needs. A radial chute is provided on the turntable 55. The radial chute is distributed along the radial direction of the turntable 55. A slider 57 is slidably connected in the radial chute. One end of the radial chute close to the adjustment shaft 52 is connected to the slider 57 through a compression spring 58. The top of the slider 57 is fixedly connected to the bottom end of the card post 56. And the top of the card post 56 passes through the arc groove 53. The elastic force of the compression spring 58 pushes the slider 57 away from the adjustment shaft 52 along the radial chute, so that the card post 56 is clamped with the corresponding card slot 54.

[0059] Pulling the card post 56 in the direction of the adjustment shaft 52 can drive the slider 57 to move towards the adjustment shaft 52. At this time, the compression spring 58 is compressed, and the card post 56 leaves the card slot 54. At this time, the turntable 55 can be rotated relative to the support disc 51 through the adjustment shaft 52, so as to change the angle between the impact guiding cylinder 61 and the small rodent. Then release the card post 56, and the compression spring 58 resets and elongates, and pushes the slider 57 away from the adjustment shaft 52 again, so that the card post 56 is re-clamped with the corresponding card slot 54, realizing the re-fixation of the turntable 55 and the support disc 51. Thus, the impact angle on the small rodent can be quickly changed.

[0060] The biological impact component 9 is installed in the impact guiding cylinder 61 of the adjustable pneumatic impact mechanism 6.

[0061] The biological impact component 9 includes an impact power column 91, an iron disc 92, a stud 94, and an impact end 95. The impact power column 91 is slidably connected inside the impact guiding cylinder 61. The iron disc 92 is detachably installed at the right end of the impact power column 91. A magnet 65 is installed in the groove on the left side of the round plug plate 62. A stud 94 is fixedly connected to the middle of the left end of the impact power column 91, and the stud 94 is threadedly connected to the impact end 95. The impact power column 91 is inserted into the impact guiding cylinder 61, and the iron disc 92 at the end of the impact power column 91 is adsorbed by the magnet 65. At this time, even if the impact position rotation adjustment mechanism 2 drives the impact guiding cylinder 61 to rotate so that the port of the impact guiding cylinder 61 faces downward, the impact power column 91 will not fall from the port of the impact guiding cylinder 61 due to gravity. By adjusting the air pipe 63 and the trigger air hole 64 to inflate the impact guiding cylinder 61, the air pressure between the round plug plate 62 and the iron disc 92 in the impact guiding cylinder 61 increases, overcoming the magnetic attraction of the magnet 65 on the iron disc 92, and pushing the impact power column 91 to be launched from the impact guiding cylinder 61. The impact end 95 at the end of the impact power column 91 impacts a small rodent to obtain a small rodent model with trauma. With the cooperation of the stud 94 and the impact end 95, different impact ends 95 can be replaced. The end of the impact end 95 away from the impact power column 91 is generally set as a conical end, and impact ends 95 with different taper degrees can be replaced according to needs.

[0062] It further includes a convex column 93. A groove is provided at one end of the impact power column 91 close to the round plug plate 62, and a convex column 93 is provided on the iron disc 92 and is in mating connection with the groove, thereby realizing the detachable connection between the iron disc 92 and the end of the impact power column 91.

[0063] The end of the impact guiding cylinder 61 is aligned with the position to be impacted by the small rodent. By adjusting the air pipe 63 and the trigger air hole 64, air is inflated into the impact guiding cylinder 61. The air pressure pushes the biological impact component 9 to be quickly launched to the right in the impact guiding cylinder 61. The biological impact component 9 quickly flies out and impacts the small rodent, and a trauma with acceleration can be obtained. The pneumatic impact stroke adjustment component drives the circular plug plate 62 and the adjustment air pipe 63 to move leftward, then the stroke of the biological impact component 9 excited in the impact guiding cylinder 61 becomes shorter, the kinetic energy obtained by the biological impact component 9 becomes smaller, and the impact force on the small rodent becomes smaller. The pneumatic impact stroke adjustment component drives the circular plug plate 62 and the adjustment air pipe 63 to move rightward, the stroke of the biological impact component 9 excited in the impact guiding cylinder 61 becomes longer, the kinetic energy obtained by the biological impact component 9 becomes larger, and the impact force on the small rodent becomes larger. It can change the impact force on the small rodent as needed to obtain trauma models of different degrees. The impact position rotation adjustment mechanism 2 drives the impact distance adjustment mechanism 3 to rotate, enabling the biological impact component 9 to impact the small rodent in the forward position from different directions, such as from left to right, from bottom to top, from right to left, and from top to bottom. The impact directions are variable and can be adjusted as needed. The impact distance adjustment mechanism 3 can change the distance between the impact guiding cylinder 61 and the small rodent as needed. The impact angle adjustment mechanism 5 enables the biological impact component 9 to impact the small rodent at different inclination angles. The impact angles are variable and the application range is wide. Even if the impact position or the impact angle changes, the small rodent can be in the forward position, keeping the relative positions of the internal organs of the small rodent unchanged. The consistency of the internal organ positions during impact is good, which is conducive to studying the impact of trauma on the internal organs.

[0064] Embodiment 2. Please refer to Figures 1 to 12 , this embodiment provides a technical solution: a pneumatic biological impact machine for small rodents on the plateau. This embodiment is generally the same as that of Embodiment 1, and the difference lies in:

[0065] An impact air supply mechanism 7 is also provided. The impact air supply mechanism 7 includes an impact air pipe 71, a valve support 72, a ball valve 73, a flexible air pipe 74, a solenoid valve 75, an air tank 76, an air pump 77, and an air supply pipe 78. The bottom of the left end of the impact guide cylinder 61 is fixedly connected to the rear end of the valve support 72. The front end of the valve support 72 is fixedly connected with a ball valve 73. One end of the ball valve 73 is connected to the right end of the adjustment air pipe 63 through the impact air pipe 71. The other end of the ball valve 73 is connected to one end of the solenoid valve 75 through the flexible air pipe 74. The other end of the solenoid valve 75 is installed at the air outlet of the air tank 76. The air inlet of the air tank 76 is connected to the outlet of the air pump 77 through the air supply pipe 78. The air pump 77 and the air tank 76 are installed on the front side of the upper surface of the base 1. The air pump 77 pumps air into the air tank 76 through the air supply pipe 78 to keep a certain air pressure level in the air tank 76. A pressure gauge and a pressure sensor can be set on the air tank 76 to facilitate observing whether the air pressure in the air tank 76 reaches the requirement. In order to keep a stable air pressure in the air tank 76, a check valve can be set at the end of the air supply pipe 78 to only allow the air supply pipe 78 to supply air into the air tank 76, and the gas in the air supply pipe 78 will not flow backward. When the biological impact component 9 needs to be launched, the solenoid valve 75 and the ball valve 73 are opened. The gas in the air tank 76 enters the adjustment air pipe 63 through the flexible air pipe 74 and the impact air pipe 71, and then enters the impact guide cylinder 61, and the biological impact component 9 is launched from the impact guide cylinder 61 through air pressure. After the air pressure in the air tank 76 decreases, the air pump 77 can be controlled to work to supplement it.

[0066] Embodiment 3. Please refer to Figures 1 to 12 , this embodiment provides a technical solution: a pneumatic biological impact machine for small rodents in the plateau. This embodiment is roughly the same as that of Embodiment 2, and the difference lies in:

[0067] After the biological impact component 9 is launched, the gas in the air tank 76 will continue to discharge air through the solenoid valve 75, the ball valve 73, and the relevant air pipes. Generally, it cannot be closed in time to reduce the air pressure loss in the air tank 76, so the air pump 77 needs to work more, wasting electric energy. Therefore, a ball valve follow-up closing mechanism 8 is set to immediately close the ball valve 73 after the biological impact component 9 is launched, reducing the air pressure loss in the air tank 76.

[0068] The ball valve follow-up closing mechanism 8 includes a longitudinal sliding sleeve 81, a follow-up plate 82, a guiding inclined plane 83, a rack 84, and a gear 85. A longitudinal sliding sleeve 81 is arranged on the front side of the left end of the impact guide cylinder 61. A follow-up plate 82 is longitudinally slidably connected in the longitudinal sliding sleeve 81. The rear end of the follow-up plate 82 extends into the impact guide cylinder 61, and a guiding inclined plane 83 is arranged on the right side of the rear end of the follow-up plate 82. The front end of the follow-up plate 82 is fixedly connected with a longitudinal rack 84. A gear 85 is installed on the valve stem at the top of the ball valve 73, and the gear 85 is meshed and connected with the rack 84.

[0069] During specific use, one end of the follower plate 82 with a guiding inclined surface 83 extends into the impact guiding cylinder 61. When the biological impact component 9 is launched from the port of the impact guiding cylinder 61, the impact end 95 first contacts the guiding inclined surface 83, and then makes frictional contact with the guiding inclined surface 83. With the guiding effect of the guiding inclined surface 83, the follower plate 82 is pushed out from the outer end of the longitudinal sliding sleeve 81, and then drives the rack 84 to move. Due to the meshing effect between the gear 85 and the rack 84, the linear motion of the rack 84 is converted into the circular motion of the gear 85. The gear 85 drives the valve stem at the top of the ball valve 73 to rotate 90 degrees to close the ball valve 73. Subsequently, the solenoid valve 75 can be closed by the staff. After adding the ball valve follower closing mechanism 8, each time the biological impact component 9 is launched to the port of the impact guiding cylinder 61, the ball valve 73 is closed, which can reduce the waste of the air pressure in the air tank 76 and reduce the working time of the air pump 77. When using it next time, the follower plate 82 is pushed back into the longitudinal sliding sleeve 81, the rack 84 moves in the reverse direction, driving the gear 85 to rotate 90 degrees in the reverse direction to reopen the ball valve 73, and then it can wait for the next use.

[0070] The ball valve follower closing mechanism 8 further includes a limiting bent rod 86 and a limiting convex plate 87. The limiting convex plate 87 is arranged at the front top of the follower plate 82, and the limiting bent rod 86 is fixedly connected to the side of the longitudinal sliding sleeve 81 by screws. The front end of the limiting bent rod 86 is located on the front side of the rack 84. Each time the follower plate 82 is pushed into the longitudinal sliding sleeve 81, the limiting convex plate 87 will stop due to the interference of the end of the longitudinal sliding sleeve 81. When the follower plate 82 is pushed out of the longitudinal sliding sleeve 81 by the extrusion of the impact end 95, the rack 84 stops when the end of the rack 84 touches the limiting bent rod 86. The limiting bent rod 86 and the limiting convex plate 87 limit the movement range of the rack 84. When the rack 84 moves within the movement range, it can drive the gear 85 to rotate within a 90-degree range, and can stably open or close the ball valve 73.

[0071] Please refer to Figures 1 to 12 , a method for using a pneumatic biological impact machine for small rodents on the plateau, including the following steps:

[0072] Move the four track sliders 410 along the track grooves 47 on the circular track 46, so that the four track sliders 410 are located at the four corners of a rectangle. Then lock the track sliders 410 and the circular track 46 with the track locking assembly, and the track sliders 410 no longer move along the track grooves 47 on the circular track 46. Then loosen the butterfly locking bolt 417, move the radial sliding rod 49 along the adjusting sleeve 416, align the four animal leg restraint assemblies with the limbs of the small rodent respectively, and then tighten the butterfly locking bolt 417. The bottom of the butterfly locking bolt 417 presses against the upper side of the radial sliding rod 49 to fix the radial sliding rod 49 and the adjusting sleeve 416 together;

[0073] Pass the four limbs of the small rodent through the leg limiting ring 419 from top to bottom, wrap the rodent leg restraint belt 421 around the leg support plate 418 and the limbs of the small rodent, and after wrapping tightly, stick the male surface of the Velcro 423 to the corresponding position on the female surface of the Velcro 422 to complete the restraint and fixation of the limbs of the small rodent;

[0074] The hollow rotating rod 22 can rotate 360 ​​degrees relative to the top of the bracket 10 by rotating the shaft 21, thereby changing the direction of the impact guide tube 61 toward the small rodent. The rotating locking assembly cooperates with the positioning ring 23 to fix the position of the hollow rotating rod 22;

[0075] The extension control assembly is used to control the hollow adjustment slide bar 31 to extend or retract into the hollow rotary bar 22, thereby changing the length of the cantilever formed by the hollow adjustment slide bar 31 and the hollow rotary bar 22, thereby controlling the distance between the port of the impact guide tube 61 and the small rodent;

[0076] The clamping column 56 is pulled toward the direction of the adjustment shaft 52, which can drive the slider 57 to move toward the adjustment shaft 52. At this time, the compression spring 58 is compressed, and the clamping column 56 leaves the clamping slot 54. At this time, the turntable 55 is rotated relative to the supporting disc 51 through the adjustment shaft 52 to change the angle between the impact guide tube 61 and the small rodent. Then, the clamping column 56 is released, and the compression spring 58 is reset and extended, pushing the slider 57 away from the adjustment shaft 52 again, so that the clamping column 56 is re-engaged with the corresponding clamping slot 54, so that the turntable 55 and the supporting disc 51 are re-fixed, thereby quickly changing the impact angle of the small rodent.

[0077] The pneumatic impact stroke adjustment component drives the round plug plate 62 and the adjustment air tube 63 to move leftward, and the stroke of the biological impact component 9 in the impact guide tube 61 becomes shorter, the kinetic energy obtained by the biological impact component 9 becomes smaller, and the impact force on the small rodent becomes smaller. The pneumatic impact stroke adjustment component drives the round plug plate 62 and the adjustment air tube 63 to move rightward, the stroke of the biological impact component 9 in the impact guide tube 61 becomes longer, the kinetic energy obtained by the biological impact component 9 becomes larger, and the impact force on the small rodent becomes larger. The impact force on the small rodent can be changed as needed to obtain trauma models of different degrees;

[0078] The air pump 77 pumps air into the air tank 76 through the air supply pipe 78 to keep a certain air pressure level in the air tank 76. When it is necessary to launch the biological impact component 9, the solenoid valve 75 and the ball valve 73 are opened, and the gas in the air tank 76 enters the adjustment air pipe 63 through the soft air pipe 74 and the impact air pipe 71, and then enters the impact guide tube 61. The biological impact component 9 is launched from the impact guide tube 61 by air pressure, so that the small rodents receive accelerated trauma;

[0079] One end of the follower plate 82 with a guiding inclined surface 83 extends into the impact guiding cylinder 61. When the biological impact component 9 is launched from the port of the impact guiding cylinder 61, the impact end 95 first contacts the guiding inclined surface 83, and then frictionally contacts the guiding inclined surface 83. With the oblique guiding action of the guiding inclined surface 83, the follower plate 82 is pushed to extend from the outer end of the longitudinal sliding sleeve 81, and then the rack 84 is driven to move. Due to the meshing of the gear 85 and the rack 84, the linear motion of the rack 84 is converted into the circular motion of the gear 85. The gear 85 drives the valve stem at the top of the ball valve 73 to rotate 90 degrees to close the ball valve 73. Subsequently, the staff closes the solenoid valve 75;

[0080] When used next time, the follower plate 82 is pushed back into the longitudinal sliding sleeve 81, the rack 84 moves in the reverse direction, driving the gear 85 to rotate 90 degrees in the reverse direction to reopen the ball valve 73, and then it can wait for the next use.

[0081] It should be noted that in the above embodiments, the output end of the air pressure sensor is electrically connected to the input end of the external PLC controller, and the connection between the air pressure sensor and the external PLC controller adopts the existing technology. The solenoid valve 75 and the air pump 77 are both controlled by the external PLC controller to work, and the control method adopts the commonly used method in the existing technology. With the help of the air pressure sensor, the external PLC controller and the air pump 77, the air pressure in the air tank 76 can be quickly restored to the required value each time after use in a numerical control manner.

[0082] It should be noted that since the treatment measures for abdominal trauma of military soldiers in the plateau field environment need to be studied, when making a small rodent model with impact injury, it also needs to be carried out in the plateau environment, and small rodents living in the plateau environment are used as experimental subjects.

[0083] 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 elements inherent to such process, method, article or device.

[0084] 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 pneumatic biological impact machine for small rodents on the plateau, comprising a base (1), and a bracket (10) is installed on the base (1), characterized in that, Further comprising: A rodent restraint mechanism (4), including a circular track (46). A height adjustment component is installed at the rear side of the bracket (10). The height adjustment component is fixedly connected to the front side of the circular track (46) through two support rod brackets (45). A track groove (47) is formed at the top of the circular track (46). Four track sliders (410) are slidably connected in the track groove (47). Track locking components are respectively installed on the sides of each track slider (410). Adjusting sleeves (416) are respectively fixedly connected to the tops of each track slider (410). Radial sliding rods (49) are respectively slidably connected in each adjusting sleeve (416). Butterfly locking bolts (417) are respectively threadedly connected to the tops of each adjusting sleeve (416). An animal leg restraint component is installed at one end of the radial sliding rod (49) close to the center of the circular track (46); An impact position rotation adjustment mechanism (2), installed at the top of the bracket (10), and the impact position rotation adjustment mechanism (2) is connected to the front side of the impact angle adjustment mechanism (5) through an impact distance adjustment mechanism (3); An adjustable pneumatic impact mechanism (6), installed at the rear side of the impact angle adjustment mechanism (5); A biological impact component (9), installed in the adjustable pneumatic impact mechanism (6); The adjustable pneumatic impact mechanism (6) includes an impact guiding cylinder (61), and a horizontal impact guiding cylinder (61) is installed at the rear side of the impact angle adjustment mechanism (5); The impact position rotation adjustment mechanism (2) includes a rotation shaft (21), a hollow rotating rod (22), a positioning ring (23) and a rotation locking component. The left end of the hollow rotating rod (22) is movably connected to the top of the bracket (10) through a longitudinal rotation shaft (21). A positioning ring (23) is installed on the front side of the bracket (10). The center of the positioning ring (23) coincides with the axis of the rotation shaft (21). The hollow rotating rod (22) is connected to the positioning ring (23) through a rotation locking component; The impact distance adjustment mechanism (3) includes a hollow adjustment slide rod (31) and an extension control component. The hollow adjustment slide rod (31) is slidably connected to the inner side of one end of the hollow rotating rod (22) away from the rotation shaft (21), and the hollow rotating rod (22) is connected to the hollow adjustment slide rod (31) through an extension control component; The impact angle adjustment mechanism (5) includes a support disc (51). The rear side of the right end of the hollow adjustment slide rod (31) is fixedly connected to the front side of the support disc (51). The middle of the support disc (51) is rotatably connected to an adjustment shaft (52). The bottom of the adjustment shaft (52) is fixedly connected to the middle of a turntable (55). The rear side of the turntable (55) is fixedly connected to an impact guiding cylinder (61) through two connecting frames (59). An arc groove (53) is formed in the support disc (51). The center of the circle where the arc groove (53) is located coincides with the axis of the adjustment shaft (52). A plurality of card slots (54) are equiangularly formed on the outer side of the arc groove (53). A radial sliding groove is formed in the turntable (55). A slider (57) is slidably connected in the radial sliding groove. One end of the radial sliding groove close to the adjustment shaft (52) is connected to the slider (57) through a compression spring (58). The top of the slider (57) is fixedly connected to the bottom end of a clamping post (56), and the top of the clamping post (56) passes through the arc groove (53).

2. The pneumatic biological impactor for small rodents on the plateau according to claim 1, characterized by: The animal leg restraint assembly includes a leg limiting ring (419). One end of the radial sliding rod (49) close to the center of the circular track (46) is fixedly connected to the leg limiting ring (419), and the bottom of the end of the radial sliding rod (49) close to the center of the circular track (46) is fixedly connected to the top of a leg support plate (418). A leg cushion (420) is arranged on one side of the leg support plate (418) close to the center of the circular track (46). One end of each of two rodent leg restraint straps (421) is respectively connected to the side of each leg support plate (418). A hook-and-loop female strip (422) is respectively arranged on one side of the two rodent leg restraint straps (421). A hook-and-loop male surface (423) is respectively arranged at the other end of the two rodent leg restraint straps (421).

3. The pneumatic biological impact machine for small plateau rodents according to claim 1, characterized in that: A circular plug plate (62) is slidably connected in the impact guiding cylinder (61). The left end of an adjustment air pipe (63) is fixedly connected to the middle of the right side of the circular plug plate (62). A trigger air hole (64) is formed in the middle of the circular plug plate (62). The adjustment air pipe (63) is slidably connected to the middle of the right end of the impact guiding cylinder (61), and the right end of the adjustment air pipe (63) is connected to a pneumatic impact stroke adjustment component.

4. The pneumatic biological impactor for small plateau rodents according to claim 3, wherein: The biological impact component (9) includes an impact power column (91), an iron disc (92), a stud (94) and an impact end (95). An impact power column (91) is slidably connected in the impact guiding cylinder (61). An iron disc (92) is detachably installed at the right end of the impact power column (91). A magnet (65) is installed in the groove on the left side of the circular plug plate (62). A stud (94) is fixedly connected to the middle of the left end of the impact power column (91), and the stud (94) is threadedly connected to the impact end (95).

5. The pneumatic biological impactor for small plateau rodents according to claim 3, characterized in that: It further includes an impact air supply mechanism (7), and the impact air supply mechanism (7) includes an impact air pipe (71), a valve support (72), a ball valve (73), a flexible air pipe (74), a solenoid valve (75), an air tank (76), an air pump (77) and an air supply pipe (78). The bottom of the left end of the impact guide cylinder (61) is fixedly connected to the rear end of the valve support (72). The front end of the valve support (72) is fixedly connected with a ball valve (73). One end of the ball valve (73) is connected to the right end of the adjustment air pipe (63) through the impact air pipe (71). The other end of the ball valve (73) is connected to one end of the solenoid valve (75) through the flexible air pipe (74). The other end of the solenoid valve (75) is installed at the air outlet of the air tank (76). The air inlet of the air tank (76) is connected to the outlet of the air pump (77) through the air supply pipe (78).

6. The pneumatic biological impactor for small plateau rodents according to claim 5, wherein: It further includes a ball valve follow-up closing mechanism (8), and the ball valve follow-up closing mechanism (8) includes a longitudinal sliding sleeve (81), a follow-up plate (82), a guiding inclined surface (83), a rack (84) and a gear (85). The longitudinal sliding sleeve (81) is arranged on the front side of the left end of the impact guide cylinder (61). A follow-up plate (82) is longitudinally slidably connected in the longitudinal sliding sleeve (81). The rear end of the follow-up plate (82) extends into the impact guide cylinder (61), and a guiding inclined surface (83) is arranged on the right side of the rear end of the follow-up plate (82). The front end of the follow-up plate (82) is fixedly connected with a longitudinal rack (84). A gear (85) is installed on the valve stem at the top of the ball valve (73), and the gear (85) is meshed with the rack (84).

7. The pneumatic biological impactor for small plateau rodents according to claim 6, characterized in that: The ball valve follow-up closing mechanism (8) further includes a limiting bent rod (86) and a limiting convex plate (87). A limiting convex plate (87) is arranged on the top of the front end of the follow-up plate (82). The limiting bent rod (86) is fixedly connected to the side surface of the longitudinal sliding sleeve (81), and the front end of the limiting bent rod (86) is located on the front side of the rack (84).

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