A vestibular illusion inducing device for rodent experimental animals

Abstract

The invention provides a vestibular illusion inducing device for rodent experimental animals, comprising a rotating disk and a base arranged thereon, wherein a body fixing seat and a head fixing plate intersecting with each other are arranged on the base, the head fixing plate is connected with a cam mechanism, and the nodding and raising of the head of a guinea pig is simulated, and the rotating disk drives the base to rotate horizontally, and the nodding and raising of the head of the guinea pig is coupled with the horizontal rotation of the guinea pig, so as to induce the vestibular illusion of the rodent; secondly, the body fixing seat is driven to rotate along the coronal plane of the rodent by a reciprocating mechanism, and the horizontal rotation of the guinea pig along the head and the rotation of the coronal plane of the body are coupled in combination with the rotating disk, so as to achieve the vestibular illusion inducing the rodent; the vestibular receptors of the guinea pig are stimulated with linear acceleration and angular acceleration, so as to induce the vestibular illusion of the rodent; and the physiological parameters of the guinea pig under the vestibular illusion are studied, which are of great significance for avoiding the vestibular illusion and the treatment method under the vestibular illusion and for maintaining flight safety.

Description

Technical Field

[0001] The patent of this invention belongs to a life science experimental device, specifically a vestibular illusion inducing device for rodent experimental animals. Background Art

[0002] In the fields of life sciences and military medicine, vestibular illusion is an important cause of flight accidents. Avoiding vestibular illusions and correctly dealing with them play a vital role in maintaining flight safety. Research on the physiological and psychological mechanisms of vestibular illusions is the basis for solving this practical problem. However, due to the lack of animal research models for vestibular illusions, research in this field is still blank. Therefore, it is particularly critical to design equipment that can induce and evaluate vestibular illusions in experimental animals.

[0003] The main difficulty in designing the research model of vestibular illusion in experimental animals is that linear acceleration stimulation and angular acceleration stimulation acting on vestibular receptors are difficult to achieve. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a vestibular illusion inducing device for rodent experimental animals, which can induce vestibular illusion in experimental animals and facilitate the study of vestibular illusion.

[0005] The present invention is achieved through the following technical solutions:

[0006] A vestibular illusion inducing device for rodent experimental animals, comprising a rotating base, a pedestal, a head fixing plate, a body fixing seat, a cam mechanism, a reciprocating mechanism and a transmission device;

[0007] The base is arranged on the rotating base, the body fixing seat is arranged on the top of the base, one end of the head fixing plate is hinged to one end of the body fixing seat, the cam mechanism is arranged at one end of the base and connected to the head fixing plate, used to drive the head fixing plate to reciprocate up and down, the reciprocating mechanism is located at the other end of the base and connected to the body fixing seat, used to drive the body fixing seat to rotate reciprocatingly along the axial direction of the arc groove;

[0008] The end of the body fixing seat is provided with a support plate which can be extended and retracted along its axial direction. When the support plate extends to the bottom of the head fixing plate, the head fixing plate rotates synchronously with the body fixing seat. The transmission device is arranged on the rotating disk and is connected with the cam mechanism or the reciprocating mechanism to make the cam mechanism or the reciprocating mechanism move.

[0009] Preferably, the cam mechanism comprises a cam, a push rod and a guide tube;

[0010] The cam is arranged at the end of the base and connected with the transmission device, the guide tube is sleeved on the push rod and connected with the end surface of the base, the upper end of the push rod is connected with the bottom surface of the head fixing plate, and the lower end is supported on the surface of the cam.

[0011] Preferably, the push rod is a telescopic rod, comprising an inner rod and an outer rod which are coaxially sleeved, and a locking device is provided on the outer rod for locking the length of the push rod.

[0012] Preferably, a fixing cover is provided on the top of the head fixing plate, and an air bag is provided on the inner wall of the fixing cover, and the air bag is used to fix the head of the mouse.

[0013] Preferably, an elastic rope is provided at the bottom of the head fixing plate, and the elastic rope obliquely connects the head fixing plate and the body fixing seat.

[0014] Preferably, the reciprocating mechanism comprises a rocker, a rotating wheel, a sector gear and a half gear;

[0015] The half gear is concentrically fixed to one end of the body fixing seat away from the head fixing plate and is located outside the base. The upper end of the swing rod is connected to the center of the circle of the fan gear. The swing rod is provided with a guide groove along its axial direction. The center of the fan gear is rotatably connected to the end surface of the base. The fan gear is meshed with the half gear. The rotating wheel is located at the end of the base. An eccentric shaft is provided on the rotating wheel. The eccentric shaft is located in the guide groove of the swing rod. The rotating wheel is connected to the transmission device.

[0016] Preferably, the rotating wheel is provided with an adjusting device for adjusting the rotation radius of the eccentric shaft.

[0017] Preferably, the transmission device comprises a spline shaft and a sliding sleeve;

[0018] The spline shaft is connected with the motor, the sliding sleeve is mounted on the spline shaft and can slide along its axial direction, and the sliding sleeve moves to engage with the connecting shaft of the cam or the connecting shaft of the rotating wheel.

[0019] Preferably, the two ends of the sleeve are respectively provided with a first transmission tooth and a second transmission tooth, the connecting shaft end of the cam is provided with a first gear, the connecting shaft end of the rotating wheel is fixedly connected to the second gear, and the first transmission tooth and the second transmission tooth are respectively used to mesh with the first gear and the second gear.

[0020] Preferably, a rocker arm is provided on the rotating disk, and both ends of the rocker arm can rotate horizontally along the middle thereof, and one end of the rocker arm is located between the first transmission tooth and the second transmission tooth.

[0021] Compared with the prior art, the present invention has the following beneficial technical effects:

[0022] The invention provides a vestibular illusion inducing device for rodent experimental animals, comprising a rotating disk and a base arranged thereon, a body fixing seat arranged on the base, a head fixing plate hinged on the body fixing seat, a head fixing plate connected to a cam mechanism, the head fixing plate is rotated up and down by the cam mechanism, the nodding and raising head action of a guinea pig is simulated, and at the same time, the rotating disk drives the base to rotate horizontally, the nodding and raising head action of the guinea pig is coupled with the horizontal rotation of the guinea pig, and the vestibular illusion of rodents is induced. Secondly, when the body fixing seat rotates, the support plate is used to The head fixing plate is limited, and the body fixing seat is driven to rotate along the coronal plane of the mouse through a reciprocating mechanism. In combination with the rotating disk, the horizontal rotation of the guinea pig along the head and the rotation along the coronal plane of the body are coupled to induce the vestibular illusion of the mouse. Through the two coupled actions, the vestibular receptors of the guinea pig are stimulated by linear acceleration and angular acceleration to induce the vestibular illusion of the mouse, and then the physiological parameters of the guinea pig in this state are collected. The study of the physiological parameters is of great significance to avoiding vestibular illusions and the correct treatment methods for maintaining flight safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of the guinea pig head end of the vestibular illusion inducing device of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the guinea pig body end of the vestibular illusion inducing device of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the lower part of the head fixing plate of the present invention;

[0026] Figure 4 It is a structural schematic diagram of the positioning plate of the present invention in an extended state;

[0027] Figure 5 It is a structural schematic diagram of the positioning plate of the present invention in a retracted state;

[0028] Figure 6 It is a structural schematic diagram of the base of the present invention;

[0029] Figure 7 It is a structural schematic diagram of the transmission device of the present invention;

[0030] Figure 8 is a schematic diagram of the transmission device of the present invention;

[0031] Fig. 9 It is a structural schematic diagram of the sliding sleeve of the present invention;

[0032] Fig.10 It is a structural schematic diagram of the rotating base of the present invention;

[0033] Fig.11 It is a schematic structural diagram of the push rod of the present invention.

[0034] In the figure: 1. chassis; 2. rotating disk; 3. head fixing plate; 4. restraint belt; 5. body fixing seat; 6. base; 7. cam; 8. rotating wheel; 9. swing arm; 10. sector gear; 11. fixing piece; 12. rack; 13. half gear; 14. guide tube; 15. air bag; 16. fixing cover; 17. push rod; 18. ring groove; 19. support plate; 20. spline shaft; 21. sliding sleeve; 22. first gear; 23. second gear; 24. motor; 25. rocker arm; 26. rotating shaft; 27. limiting sleeve; 30. elastic rope; 31. guide groove; 32. slide groove; 33. roller; 34. rotating motor; 35. outer rod; 36. inner rod; 37. locking nut. DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and taking guinea pigs as an example, which is intended to explain the present invention rather than to limit it.

[0036] See also Figure 1-11 A vestibular illusion inducing device for rodent experimental animals comprises a rotating base, a base 6, a head fixing plate 3, a body fixing seat 5, a cam mechanism, a reciprocating mechanism and a transmission device.

[0037] The base 6 is arranged on a rotating base, and an arc groove is arranged on the top of the base 6. The body fixing seat 5 is fitted in the arc groove. One end of the head fixing plate 3 is hinged to one end of the body fixing seat 5. The cam mechanism is arranged at one end of the base and connected to the head fixing plate 3, and is used to drive the head fixing plate 3 to reciprocate up and down. The reciprocating mechanism is located at the other end of the base and is connected to the body fixing seat 5, and is used to drive the body fixing seat 5 to rotate reciprocatingly along the axial direction of the arc groove.

[0038] The end of the body fixing seat 5 is provided with a support plate 19 which can be extended and retracted along its axial direction. When the support plate 19 extends to the bottom of the head fixing plate 3, the head fixing plate 3 and the body fixing seat 5 rotate synchronously.

[0039] The transmission device is located at the bottom of the base and is respectively connected with the cam mechanism and the reciprocating mechanism to make the cam mechanism or the reciprocating mechanism move.

[0040] The above-mentioned head fixing plate is located outside the base and is hinged to the end of the body fixing base 5. The cam mechanism includes a cam 7, a push rod 17 and a guide tube 14. The cam is connected with a rotating shaft, which passes through the base and is connected to the transmission device. The cam is located on the end surface of the base. A guide groove 31 is provided on the bottom surface of the head fixing plate. The guide groove is arranged along the axial direction of the arc groove. The guide tube 14 is sleeved on the push rod and connected to the side wall of the base. The upper end of the push rod 17 is mounted in the guide groove, and the lower end is supported on the surface of the cam. When the cam rotates, the push rod moves up and down, and the upper end of the push rod drives the head fixing plate to rotate up and down along its hinged end, which is used to simulate the movement of the guinea pig's head nodding and tilting its head.

[0041] The upper end of the push rod 17 is provided with a ball, which is fitted in the guide groove. The rotation of the cam causes the push rod to move up and down and drives the head fixing plate to move synchronously through the ball.

[0042] A roller is arranged at the bottom of the push rod, and a ring groove is arranged on the working surface of the cam. The roller is assembled in the ring groove to avoid friction between the cam and the push rod, thereby extending the service life of the cam and the push rod.

[0043] An arc-shaped fixing cover 16 is arranged on the top of the head fixing plate, and the guinea pig's head is located below the fixing cover. An air bag 15 is arranged on the inner wall of the fixing cover, and the air bag is provided with an inflation port and an exhaust port. By inflating the air bag, the guinea pig's head is squeezed and fixed so that it is tightly attached to the head fixing plate, thereby realizing synchronous movement with the head fixing plate.

[0044] The fixed cover is an arc-shaped structure and is installed on the head fixing plate to form a semicircular channel with two open ends. One end is used for the guinea pig's head to enter, and the other end is convenient for the guinea pig to breathe. The fixed cover is located at the axial center of the rotating disk. When the guinea pig's head is located in the fixed cover, the guinea pig's head is located in the center of the rotating disk.

[0045] The above-mentioned body fixing seat 5 is a semi-cylindrical structure, and the arc surface of the semi-cylinder is mounted in the arc groove on the top of the base. The guinea pig's body is fixed on the top surface of the body fixing seat 5. A plurality of restraints 4 are arranged at intervals on the top surface of the body fixing seat 5. The restraints are used to fix the guinea pig's body so that it rotates synchronously with the body fixing seat 5, that is, it rotates back and forth along the central axis of the semi-cylinder.

[0046] A plurality of annular grooves 18 are arranged in the arc groove of the base at intervals along its axial direction, and the annular grooves are arranged along the radial direction of the arc groove. A limiting ring matching the annular groove is arranged on the arc surface of the body fixing seat 5, and a ball is arranged in the annular groove. When the body fixing seat 5 is located in the arc groove, the limiting ring is located in the annular groove 18, and the surface of the limiting ring contacts with the ball, so that the body fixing seat 5 can rotate more smoothly in the arc groove through the ball.

[0047] The reciprocating mechanism comprises a rocker rod 9 , a rotating wheel 8 , a sector gear 10 and a half gear 13 .

[0048] The half gear 13 is concentrically fixed to one end of the body fixing seat 5 away from the head fixing plate 3 and is located outside the base. The end of the rocker arm is connected to the center of the circle of the sector gear 10. The rocker arm is provided with a guide groove along its axial direction. The center of the sector gear 10 is rotatably connected to the end surface of the base. The sector gear 10 is meshed with the half gear 13. The rotating wheel 8 is embedded in the end surface of the base. The rotating wheel 8 is provided with an eccentric shaft. The eccentric shaft is located in the guide groove of the rocker arm. The rotating wheel 8 is connected to the transmission device.

[0049] An adjusting device is arranged on the rotating wheel for adjusting the rotation radius of the eccentric shaft and controlling the rotation angle of the body fixing plate.

[0050] The adjusting device is a step groove arranged along the radial direction of the impeller, the eccentric shaft is arranged in the step groove, and its end passes through the step groove and is connected to the nut; another way is that a plurality of fixing holes are arranged on the end face of the impeller and are located at different radii, the eccentric shaft is connected to different fixing holes by threads, and the interface adjusts the rotation radius.

[0051] During operation, the transmission device drives the rotating wheel 8 to rotate, and the eccentric shaft drives the swing rod to swing back and forth, thereby causing the sector gear to drive the half gear to rotate back and forth, thereby causing the body fixing seat 5 to rotate back and forth along the axis of the arc groove.

[0052] Furthermore, a rack 12 is provided between the half gear 13 and the fan gear 10, and meshing teeth for the half gear and the fan gear are provided on the top and bottom surfaces of the rack respectively. The fan gear drives the rack to move horizontally, and then drives the half gear to rotate through the rack. The half gear is fixedly connected to the body fixing seat, thereby causing the body fixing seat to rotate. Fixing parts 11 are provided at both ends of the rack, and the fixing parts are fixedly connected to the side walls of the base. Both ends of the rack are located in the holes of the fixing parts, and the rack can slide along the holes. The teeth of the half gear and the fan gear can have different parameters through the rack.

[0053] A support plate 19 is provided at the end of the body fixing seat 5, and a mounting hole for installing the support plate is provided on the body fixing seat 5, and the support plate can extend or retract along the mounting hole. When the head fixing plate rotates up and down, the support plate 19 is located in the mounting hole. When the body fixing seat 5 rotates, the support plate extends to the bottom of the head fixing plate, and the bottom surface of the head fixing plate is tightly attached to the surface of the support plate 19, and the surface of the head fixing plate and the surface of the body fixing seat 5 are located in the same plane.

[0054] An elastic rope 30 is provided at the bottom of the head fixing plate 3, one end of the elastic rope is connected to the bottom end of the head fixing plate 3, and the other end is connected to the lower part of the end surface of the body fixing seat 5. The elastic rope 30 applies tension to the head fixing plate 3 to make it close to the support plate to prevent the head fixing plate 3 from shaking when the body fixing seat 5 rotates.

[0055] It should be noted that when the head fixing plate rotates up and down, the support plate retracts into the mounting hole. At this time, the tension of the elastic rope on the head fixing plate is applied to the push rod. The push rod moves upward, the head fixing plate rotates upward, the elastic rope is stretched, the push rod moves downward, and the head fixing plate rotates downward under the action of elastic force and gravity.

[0056] The push rod is a telescopic rod, including an inner rod 36 and an outer rod 35 which are sleeved with each other. The lower end of the outer rod is connected to the cam, the ball is located at the upper end of the inner rod, an expansion joint is provided on the side wall of the upper end of the outer rod, and a locking nut 37 is provided at the upper end of the outer rod. The locking nut 37 is connected to the outer rod through a tapered thread. The inner rod is limited by the locking nut 37 to control the total length of the push rod.

[0057] When the body fixing seat rotates, the push rod is shortened to the minimum length, so that the ball is separated from the guide groove, that is, the cam mechanism is separated from the head fixing plate, and the support plate is extended at the same time. Under the action of elastic force, the head fixing plate is tightly attached to the support plate, so that the body fixing seat and the head fixing plate form a whole and rotate synchronously.

[0058] The bottom of the base is provided with a transmission space for installing a transmission device, and the transmission device includes a motor 24, a spline shaft 20, a sleeve 21, a first gear 22 and a second gear 23.

[0059] The first gear 22 and the second gear 23 are respectively connected to the two ends of the transmission space. The first gear 22 is connected to the rotating wheel 8 through a connecting shaft, and the second gear 23 is connected to the cam 7 through a connecting shaft. The motor is arranged on the rotating disk, and the output end of the motor 24 is connected to the spline shaft 20. The spline shaft 20 is arranged parallel to the connecting shaft. The sleeve 21 is matched on the spline shaft 20 through a spline hole. The cross-section of the sleeve is I-shaped, and the two ends of the sleeve 21 are respectively provided with a first transmission tooth and a second transmission tooth meshing with the first gear 22 and the second gear 23.

[0060] When the cam 7 rotates, that is, when the head fixing plate needs to rotate up and down, the sleeve moves to make the second transmission tooth engage with the second gear 23, and the first transmission tooth separates from the first gear 22. At this time, the motor drives the spline shaft and the sleeve to rotate, and the sleeve 21 drives the second gear 23 to rotate through the second transmission tooth. The second gear 23 drives the cam to rotate through the connecting shaft, and then drives the head fixing plate to move through the push rod.

[0061] When the rotating wheel 8 rotates, that is, when the body fixing seat needs to reciprocate, the sleeve moves to make the first transmission tooth engage with the first gear 22, and the second transmission tooth separates from the second gear 23. At this time, the motor drives the spline shaft and the sleeve to rotate, and the sleeve 21 drives the first gear 22 to rotate through the first transmission tooth. The first gear 22 drives the rotating wheel 8 to rotate through the connecting shaft. The rotating wheel 8 drives the rocker rod 9 to swing, and then the fan gear drives the body fixing seat to reciprocate through the half gear 13.

[0062] A rocker arm seat and a rocker arm 25 are provided on the rotating disk, a pin shaft is provided on the top of the rocker arm 25 is provided on the pin shaft, the middle part of the rocker arm 25 is sleeved on the pin shaft, one end of the rocker arm extends between the first transmission tooth and the second transmission tooth, and the other end of the rocker arm can be operated to push the sleeve to move along the spline shaft, thereby controlling the position of the sleeve so that the sleeve engages with the first gear 22 or the second gear 23. A limiting sleeve 27 is also provided on the transmission shaft, and the two limiting sleeves are located on both sides of the sleeve for limiting the sliding distance of the sleeve.

[0063] The rotating base includes a base and a rotating disk 2 located on the chassis 1 and arranged on the top thereof. A rotating motor 34 is arranged at the center of the base. The center of the rotating disk 2 is fixed to the output shaft of the rotating motor 34 to make the rotating disk rotate. A roller 33 is arranged on the bottom edge of the rotating disk.

[0064] The working principle of the vestibular illusion inducing device for rodent experimental animals provided by the present invention is described in detail below.

[0065] There are two actions that induce the vestibular illusion in mice: 1. The guinea pig's head moves up and down along the sagittal plane, that is, nodding and raising its head; 2. The guinea pig's head rotates back and forth along the coronal plane, that is, the guinea pig rotates back and forth along the axis of its body. The following is a detailed description of the two actions.

[0066] 1. The guinea pig's head moves up and down along the sagittal plane

[0067] First, the guinea pig's body is fixed on the body fixing seat 5 by means of a restraint belt, wherein one of the restraint belts is located at the neck of the guinea pig, the guinea pig's head is inserted into the fixing cover and is located at the center of the rotating disk, and the airbag is inflated to fix the guinea pig's head on the head fixing plate.

[0068] Then, adjust the length of the push rod so that the ball at the upper end of the push rod is located in the guide groove, the roller at the lower end is located in the cam groove, and the support rod is retracted into the mounting hole of the body fixing seat 5, and the synchronous fixing plate is pressed on the support rod under the action of the elastic rope.

[0069] Then, start the motor and drive the sleeve to move through the rocker arm, so that the second transmission tooth of the sleeve engages with the second gear 23, and the first transmission tooth separates from the first gear 22. The motor drives the spline shaft and the sleeve to rotate, and the sleeve 21 drives the second gear 23 to rotate through the second transmission tooth. The second gear 23 drives the cam to rotate through the connecting shaft, and then drives the head fixing plate to move through the push rod. The action angle of the head fixing plate is 0-60°.

[0070] Finally, the rotating motor is started to rotate the rotating disk, causing the guinea pig's body to rotate horizontally along the head. At the same time, the push rod drives the head fixing plate to rotate along the hinged end, causing the guinea pig to raise and lower its head while rotating horizontally along the head. The two actions are coupled to induce the guinea pig's vestibular illusion.

[0071] 2. Reciprocating rotation of the guinea pig's head along the coronal plane

[0072] First, the support plate is extended to the bottom surface of the head fixing plate, and the head fixing plate and the support plate are integrated under the tension of the elastic rope.

[0073] Then, shorten the length of the push rod to separate the upper end of the push rod from the head fixing plate.

[0074] Then, start the motor and move the sleeve through the rocker arm, so that the first transmission tooth engages with the first gear 22, and the second transmission tooth separates from the second gear 23. At this time, the motor drives the spline shaft and the sleeve to rotate, and the sleeve 21 drives the first gear 22 to rotate through the first transmission tooth. The first gear 22 drives the rotating wheel 8 to rotate through the connecting shaft, and the rotating wheel 8 drives the rocker rod 9 to swing, and then the fan gear drives the body fixing seat to reciprocate through the half gear 13, so that the guinea pig reciprocates along the axial direction of the body, and the swing angle is 0-60°.

[0075] Finally, the rotating motor is started to rotate the rotating disk, causing the guinea pig's body to rotate horizontally along the head. At the same time, the body fixing plate is driven to rotate along the central axis through the rotating wheel, swing arm, fan gear and half gear, so that the guinea pig rotates horizontally along the head while reciprocating its body. The two actions are coupled to induce the guinea pig's vestibular illusion.

[0076] By connecting physiological collectors to the body and head of a guinea pig, the physiological signs of the guinea pig in a vestibular illusion state can be studied. This device meets the needs of researchers in the fields of life sciences and military medicine for animal models of illusion models, can effectively fill the gap in animal models of flight illusion, and facilitate the smooth development of research in related fields.

[0077] The above contents are only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A vestibular illusion inducing device for rodent experimental animals, characterized in that: It comprises a rotating base, a pedestal (6), a head fixing plate (3), a body fixing seat (5), a cam mechanism, a reciprocating mechanism and a transmission device; The base (6) is arranged on a rotating base, the body fixing seat (5) is arranged on the top of the base (6), one end of the head fixing plate (3) is hinged to one end of the body fixing seat (5), a cam mechanism is arranged at one end of the base and connected to the head fixing plate (3), and is used to drive the head fixing plate (3) to reciprocate up and down, and the reciprocating mechanism is located at the other end of the base and is connected to the body fixing seat (5), and is used to drive the body fixing seat (5) to rotate reciprocatingly along the axial direction of the arc groove; The end of the body fixing seat (5) is provided with a support plate (19) which can be extended and retracted along its axial direction; when the support plate (19) extends to the bottom of the head fixing plate (3), the head fixing plate (3) rotates synchronously with the body fixing seat (5); the transmission device is arranged on the rotating disk and is connected to the cam mechanism or the reciprocating mechanism to activate the cam mechanism or the reciprocating mechanism; The top of the head fixing plate is provided with a fixing cover (16), and the inner wall of the fixing cover is provided with an air bag (15), and the air bag is used to fix the head of the mouse; the bottom of the head fixing plate (3) is provided with an elastic rope, and the elastic rope obliquely connects the head fixing plate (3) and the body fixing seat (5).

2. A vestibular illusion inducing device for rodent experimental animals according to claim 1, characterized in that: The cam mechanism comprises a cam (7), a push rod (17) and a guide tube (14); The cam is arranged at the end of the base and connected to the transmission device, the guide tube (14) is sleeved on the push rod and connected to the end surface of the base, the upper end of the push rod (17) is connected to the bottom surface of the head fixing plate, and the lower end is supported on the surface of the cam.

3. A vestibular illusion inducing device for rodent experimental animals according to claim 2, characterized in that: The push rod is a telescopic rod, comprising an inner rod and an outer rod which are coaxially sleeved, and a locking device is arranged on the outer rod for locking the length of the push rod.

4. A vestibular illusion inducing device for rodent experimental animals according to claim 1 or 2, characterized in that: The reciprocating mechanism comprises a rocker (9), a rotating wheel (8), a sector gear (10) and a half gear (13); The half gear (13) is coaxially fixed to one end of the body fixing seat (5) away from the head fixing plate (3) and is located outside the base. The upper end of the swing rod is connected to the center of the fan-shaped gear (10). The swing rod is provided with a guide groove along its axial direction. The center of the fan-shaped gear (10) is rotatably connected to the end surface of the base. The fan-shaped gear (10) is meshed with the half gear (13). The rotating wheel (8) is located at the end of the base. The rotating wheel (8) is provided with an eccentric shaft. The eccentric shaft is located in the guide groove of the swing rod. The rotating wheel (8) is connected to the transmission device.

5. The vestibular illusion inducing device for rodent experimental animals according to claim 4, characterized in that: The rotating wheel is provided with an adjusting device for adjusting the rotation radius of the eccentric shaft.

6. The vestibular illusion inducing device for rodent experimental animals according to claim 4, characterized in that: The transmission device comprises a spline shaft (20) and a sliding sleeve (21); The spline shaft is connected to the motor, and the sliding sleeve (21) is mounted on the spline shaft and can slide along its axial direction. The sliding sleeve (21) moves to engage with the connecting shaft of the cam or the connecting shaft of the rotating wheel.

7. The vestibular illusion inducing device for rodent experimental animals according to claim 6, characterized in that: The two ends of the sliding sleeve are respectively provided with a first transmission tooth and a second transmission tooth, the end of the connecting shaft of the cam is provided with a first gear (22), the end of the connecting shaft of the rotating wheel is fixedly connected to the second gear (23), and the first transmission tooth and the second transmission tooth are respectively used to mesh with the first gear (22) and the second gear (23).

8. The vestibular illusion inducing device for rodent experimental animals according to claim 7, characterized in that: The rotating disk is provided with a rocker arm, both ends of which can rotate horizontally along the middle thereof, and one end of the rocker arm is located between the first transmission tooth and the second transmission tooth.

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