Method for cooperative experimentation on non-human primates and device therefor

Abstract

The application belongs to the field of animal research, and discloses a non-human primate cooperation experiment method and device, which comprises the following steps: step one, using open source single-chip microcomputer code editing software to write required cooperation logic code and burning the code into a circuit board; step two, starting the animal cooperation experiment device; step three, an animal operating a pressing part; step four, judging the triggering condition of the pressing part, if the condition meets the cooperation logic, the cooperation experiment device outputs food, otherwise, the cooperation experiment device outputs a punishing content; and step five, resetting the animal cooperation experiment device; when multiple non-human primates complete cooperation, the application uses food as a reward to encourage cooperation among animals, so that the cooperation mode among non-human primates can be studied, the food stored in the food bin can be supplemented into the temporary storage cavity after the reward, so that the temporary storage cavity always has food, and the device has a small volume and can be installed outside a monkey cage for use at any time.

Description

Technical Field

[0001] This invention belongs to the field of animal research, specifically relating to a method and apparatus for cooperative experiments with non-human primates. Background Technology

[0002] Cooperation is a high-level cognitive behavior in animals, involving two or more individuals working together to achieve a common goal. Cooperative behavior among animals is widespread in nature. Experiments on cooperation among non-human primates (chimpanzees, macaques) and rodents (mice) have demonstrated that animals at different evolutionary levels possess the ability to complete cooperative tasks at different levels. Cooperation is also crucial to the development of human society.

[0003] However, little is known about the details of how and why cooperation evolved. While significant progress has been made in human subjects using brain functional imaging combined with behavioral cooperation tasks, these studies have yielded limited results in directly answering the questions of how and why cooperation evolved, given the complexity of human intelligence and social activities. It is now widely believed that human social information is supported by certain brain regions, often referred to as the social brain. Neuroanatomical and functional imaging studies have shown that these social cognitive brain regions existed in the brains of the common ancestor of humans and macaques 25 million years ago. Therefore, non-human primates are ideal models for exploring the evolution of cooperation and its neural basis. Using appropriate cooperative behavioral paradigms, the relationship between non-human primate social cognitive brain regions and different levels of cooperative behavior can be revealed, contributing to our understanding of the evolution and mechanisms of human cooperative behavior. Furthermore, social and cooperative behavioral disorders are prevalent in certain human neuropsychiatric diseases (such as autism, depression, and schizophrenia). Therefore, there is an urgent need for non-human primate models, which are genetically, physiologically, and behaviorally closest to humans, to elucidate the mechanisms and treatment strategies for abnormal human cooperative behavior.

[0004] However, there are very few types of experimental devices currently available for research on cooperative behavior in non-human primates, and these are more common abroad than in other countries. The few cooperative behavior devices available in China suffer from problems such as inconvenience in use, complex procedures for training experimental animals, and strong stress on experimental animals during use. Therefore, there is an urgent need for new and efficient cooperative experimental devices to assist in the research on cooperative behavior in non-human primates. Such devices will be helpful in exploring the evolutionary mechanism of human cooperative behavior, as well as the pathogenesis and treatment of abnormal cooperative behavior in human diseases. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a method and apparatus for cooperative experiments in non-human primates, thereby resolving the issues in the prior art. To achieve the aforementioned objective, the technical solution adopted by this invention is as follows:

[0006] A method for collaborative experiments in non-human primates, characterized by the following steps:

[0007] Step 1: Use open-source microcontroller code editing software to write the required collaborative logic code and burn it onto the circuit board.

[0008] Step two: Start the animal cooperation experiment device;

[0009] Step 3: Animals operate the pressing parts;

[0010] Step 4: Determine the triggering condition of the pressed component. If the cooperation logic is met, the cooperative experimental device will output food; otherwise, it will output a penalty.

[0011] Step 5: Reset the animal cooperation experimental setup;

[0012] Multiple pressing components are set up, and the trigger condition for pressing components that conform to the cooperation logic is that multiple pressing components are pressed simultaneously within a time window.

[0013] A non-human primate cooperative experimental device, employing the aforementioned experimental method, includes a pressing component, a cylinder, a food compartment, and a drive unit;

[0014] The cylinder is arranged horizontally along its axis. One side of the cylinder is connected to the food compartment, and the other side of the cylinder is provided with a discharge port. Multiple partitions are provided inside the cylinder. The multiple partitions are distributed around the axis of the cylinder. A temporary storage cavity is formed between two adjacent partitions. The discharge port is connected to one of the temporary storage cavities, and the food compartment is connected to the other temporary storage cavity. The main shaft is fixedly connected to the inner side of the multiple partitions.

[0015] A rotating plate is rotatably installed inside the food compartment to control the output of food;

[0016] The drive unit connects the main shaft and the rotating plate. The drive unit is used to drive the main shaft and the rotating plate to rotate simultaneously. The angle of rotation of the main shaft each time is the included angle between two adjacent partitions, so that the temporary storage cavity alternately passes through the discharge port.

[0017] Multiple pressing components are provided, and the multiple pressing components are connected to the driving part. When the multiple pressing components are pressed at the same time, the driving part causes the main shaft and the rotating plate to rotate, so that the food is fed from the feeding port and the food in the food compartment is input into the temporary storage chamber.

[0018] Furthermore, the cylinder is provided with multiple baffles, which are fixedly connected to the outer sides of two adjacent partitions to close the temporary storage cavity. In the circumference of the main shaft, the multiple baffles are spaced apart, so that the temporary storage cavities on both sides of the baffles are open structures.

[0019] When multiple pressing components are pressed simultaneously, the driving part drives the main shaft and the rotating plate to rotate twice.

[0020] Furthermore, the rotating plate includes two parts, namely an upper rotating plate and a lower rotating plate, and a transition cavity is formed between the lower part of the upper rotating plate and the upper part of the lower rotating plate;

[0021] When one of the baffles blocks the feed inlet, the lower rotating plate is horizontally positioned and the upper rotating plate is vertically positioned, thereby allowing the food in the food compartment to enter the transition cavity;

[0022] When one of the temporary storage chambers is connected to the feeding port, the lower rotating plate is vertically arranged and the upper rotating plate is horizontally arranged, so that the food in the transition chamber enters the temporary storage chamber;

[0023] The two rotating plates rotate 90° each time under the drive of the drive unit.

[0024] Furthermore, a hollow channel is fixedly provided at the bottom of the food compartment, and both rotating plates are located inside the hollow channel. The size of the rotating plates is adapted to the hollow channel, and the hollow channel is blocked when the rotating plates are set horizontally.

[0025] A feeding port is fixedly provided on the side of the cylinder away from the feeding port. The feeding port is fixedly connected to the outside of the food compartment and communicates with the hollow channel. Its connection part is located below the lower rotating plate.

[0026] The feed port and the discharge port are simultaneously blocked by two baffles, or simultaneously connected to two temporary storage chambers.

[0027] Furthermore, the drive section includes a motor, a first driven wheel, and a second driven wheel;

[0028] The output end of the motor is connected to a first driven wheel and a second driven wheel. The first driven wheel is fixedly connected to the end of the main shaft, and the second driven wheel is connected to the two rotating plates.

[0029] Furthermore, rotating shafts are fixedly connected to the two rotating plates respectively, and the two rotating shafts pass through the food compartment and are fixedly connected to the upper gear and the lower gear respectively;

[0030] The second driven wheel is fixedly connected to the end face of the cam. The cam is rotatably connected to the outer side of the food compartment. The circumferential surface of the cam abuts against the bottom of the slide rod. The top of the slide rod is connected to a return spring, thereby forming a cam mechanism. The side of the slide rod is fixedly connected to a rack that meshes with the upper gear and the lower gear.

[0031] When the motor drives the cam to rotate, the upper rotating plate and the lower rotating plate rotate 90° each time.

[0032] Furthermore, it also includes LED lights and a buzzer. When the pressing part fails to meet the cooperative task triggering requirements, the LED lights flash and the buzzer plays a sound.

[0033] The present invention has the following beneficial effects: When multiple non-human primates complete cooperation, the present invention uses food as a reward to encourage cooperation among the animals, thereby enabling the study of cooperation patterns among non-human primates. The food stored in the food bin can be replenished into the temporary storage cavity after the reward, ensuring that there is always food in the temporary storage cavity. The invention is small in size and can be installed outside the monkey cage at any time. Attached Figure Description

[0034] Figure 1 This is a flowchart illustrating the collaborative experimental method of the present invention;

[0035] Figure 2 This is a schematic diagram of the overall structure of the collaborative experimental setup;

[0036] Figure 3 A schematic diagram illustrating the process of food being introduced into the transition cavity;

[0037] Figure 4 This is a diagram illustrating the process of outputting food.

[0038] Figure 5 This is a schematic diagram showing the rotating plate when it has rotated to half its stroke.

[0039] Figure 6 This is a schematic diagram of the STM32 microcontroller ports;

[0040] Figure 7 This is a circuit diagram for the key signal input.

[0041] Figure 8 This is a circuit diagram for a stepper motor drive.

[0042] Among them Figures 3-5 In the figure, (a) shows the positional relationship between the rotating plate and the baffle in the corresponding state of the attached figure, and (b) shows the cam state in the corresponding state of the attached figure. Detailed Implementation

[0043] The following will be based on embodiments of the present invention. Figures 1-8 The technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0044] It should be noted that, in this invention, Figure 1 , Figure 2The diagram shown is a structural diagram of the machine in its initial state. For ease of description, all directional terms are described based on this initial state. It is understood that after the machine moves, the angles and orientations between the various components will change relatively. This invention aims to clearly describe the structure in its initial state, which naturally also includes the structure after the changes in motion.

[0045] A method for collaborative experiments in non-human primates, characterized by the following steps:

[0046] Step 1: Use open-source microcontroller code editing software to write the required collaborative logic code and burn it onto the circuit board.

[0047] Step two: Start the animal cooperation experiment device;

[0048] Step 3, animal operation pressing component 1;

[0049] Step 4: Determine the triggering condition of pressing component 1. If the cooperation logic is met, the cooperation experiment device will output food; otherwise, it will output penalty content, which includes, but is not limited to, LED flashing and buzzer playing sound.

[0050] Step 5: Reset the animal cooperation experimental setup;

[0051] Multiple pressing components 1 are provided. The triggering condition for pressing components 1 that conform to the cooperation logic is that multiple pressing components 1 are pressed simultaneously within a time window.

[0052] The above output is implemented based on the PCB circuit board shown in the figure. When the pressing component 1 is triggered, as follows: Figure 7 When the circuit shown is working, the TEST_BUTTON1 pin senses a potential change, and after voltage regulation, the MCU_BUTTON pin sends an input signal to the microcontroller. Figure 8 The microcontroller shown aggregates the input data from each input channel, performs logical judgment, and outputs signals to MOTOR_1_U, MOTOR_2_U, MOTOR_3_U, and MOTOR_4_U. Figure 8 The stepper motor drive circuit shown controls the stepper motor to rotate, which in turn drives the drive wheel 5 to rotate.

[0053] like Figure 2 A non-human primate cooperative experimental device, employing the aforementioned experimental method, includes a pressing component 1, a cylinder 3, a food compartment 4, and a driving component;

[0054] The cylinder 3 is arranged horizontally along its axis. One side of the cylinder 3 is connected to the food compartment 4, and the other side of the cylinder 3 is provided with a discharge port 304. Multiple partitions 301 are provided inside the cylinder 3. The multiple partitions 301 are distributed around the axis of the cylinder 3. A temporary storage cavity is formed between two adjacent partitions 301. The discharge port 304 is connected to one of the temporary storage cavities, and the food compartment 4 is connected to the other temporary storage cavity. The main shaft 303 is fixedly connected to the inner side of the multiple partitions 301.

[0055] A rotating plate is rotatably installed inside the food compartment 4 to control the output of food;

[0056] The drive section connects the main shaft 303 and the rotating plate. The drive section is used to drive the main shaft 303 and the rotating plate to rotate simultaneously. The angle of rotation of the main shaft 303 each time is the included angle between two adjacent partitions 301, so that the temporary storage cavity alternately passes through the discharge port 304.

[0057] Multiple pressing components 1 are provided, and the multiple pressing components 1 are connected to the driving part. When the multiple pressing components 1 are pressed at the same time, the driving part causes the main shaft 303 and the rotating plate to rotate, so that the food is fed out from the feeding port 304, and the food in the food compartment 4 is input into the temporary storage cavity.

[0058] The cylinder 3 is provided with an internal chamber, which is cylindrical in structure and horizontally arranged along the axis, coaxial with the main shaft 303. The purpose of the rotating plate is to open or block the food compartment 4, so that a portion of the food in the food compartment 4 enters the temporary storage chamber in sequence. The food compartment 4 can store food for non-human primates. Multiple partitions 301 divide the internal chamber into fan-shaped temporary storage chambers with equal central angles. The discharge port 304 is located at the lower end of one side of the cylinder 3, and the food compartment 4 is connected to the upper end of the other side of the cylinder 3.

[0059] Figure 2 , Figure 3 The initial state of the entire device is shown in the image. When multiple non-human primates operate and press the pressing component 1, the drive unit drives the main shaft 303 and the rotating plate to rotate. The rotating plate opens the food chamber 4, thereby replenishing food into the temporary storage chamber. The next temporary storage chamber adjacent to the discharge port 304 rotates to connect with the discharge port 304, thus outputting its food under gravity. The cooperation among multiple non-human primates is reward-based, forming... Figure 4 In contrast to existing technologies, this invention uses food as a reward when multiple non-human primates complete cooperation, thereby encouraging cooperation among them and enabling the study of cooperation patterns among non-human primates. The food stored in the food bin 4 can be replenished into the temporary storage cavity after the reward, ensuring that there is always food in the temporary storage cavity.

[0060] In addition, the partition 301 below the temporary storage cavity connected to the feeding port 304 is inclined so that food can be output under the action of gravity. The feeding port 304 is located below the horizontal plane where the main shaft 303 is located. The food is existing technology, preferably block, granular food or feed, etc. The pressing component 1 can be a button, a pressure rod, etc.

[0061] Furthermore, the cylinder 3 is provided with multiple baffles 302, which are fixedly connected to the outer sides of two adjacent partitions 301, thereby closing the temporary storage cavity. In the circumference of the main shaft 303, the multiple baffles 302 are spaced apart, so that the temporary storage cavities on both sides of the baffles 302 are open structures. When multiple pressing components 1 are pressed at the same time, the driving part drives the main shaft 303 and the rotating plate to rotate twice.

[0062] Specifically, the baffle 302 is arc-shaped and fits against the inner wall of the cylinder 3 to form a sealed structure. The number of partitions 301 is an even number, such as 12 in the attached figure. The number of baffles 302 is half the number of partitions 301, such as 6 in the attached figure. A baffle 302 is provided for every alternate temporary storage cavity, so that the closed temporary storage cavity and the open temporary storage cavity are alternately distributed.

[0063] Furthermore, the rotating plate includes two parts, namely an upper rotating plate 401 and a lower rotating plate 402, and a transition cavity is formed between the lower part of the upper rotating plate 401 and the upper part of the lower rotating plate 402.

[0064] When one of the baffles 302 blocks the discharge port 304, the lower rotating plate 402 is set horizontally and the upper rotating plate 401 is set vertically, so that the food in the food compartment 4 enters the transition cavity;

[0065] When one of the temporary storage chambers is connected to the feeding port 304, the lower rotating plate 402 is vertically arranged and the upper rotating plate 401 is horizontally arranged, so that the food in the transition chamber enters the temporary storage chamber;

[0066] The two rotating plates rotate 90° each time under the drive of the drive unit. The two rotating plates have only horizontal and vertical states, and the states are opposite. When one is vertical, the other is horizontal.

[0067] In addition, a feeding port 305 is fixedly provided on the side of the cylinder 3 away from the feeding port 304. The feeding port 305 is fixedly connected to the outside of the food compartment 4 and communicates with the hollow channel. Its connection part is located below the lower rotating plate 402. The feeding port 305 and the feeding port 304 are blocked by two baffles 302 at the same time, or connected to two temporary storage chambers at the same time. The feeding port 305 is inclined to facilitate food entering the temporary storage chamber. A lower cover plate 403 is fixedly connected to the bottom of the hollow channel. The lower cover plate 403 is inclined and located below the lower rotating plate 402. The lower rotating plate 402 is inclined in the same direction as the feeding port 305, thereby guiding the food into the feeding port 305 and avoiding food accumulation.

[0068] from Figure 3 In the initial state, before the start, the drive unit drives the main shaft 303 and the two rotating plates to rotate for the first time. The lower rotating plate 402 rotates from horizontal to vertical, and the upper rotating plate 401 rotates from vertical to horizontal, forming... Figure 4 In the current state, the food in the transition cavity between the upper and lower rotating plates enters the temporary storage cavity connected to the food compartment 4. During this process, the main shaft 303 rotates once, connecting the discharge port 304 and the loading port 305 to their respective temporary storage cavities. Then, the drive unit drives the main shaft 303 and the two rotating plates to rotate a second time, with the lower rotating plate 402 rotating from vertical to horizontal and the upper rotating plate 401 rotating from horizontal to vertical. Figure 4 Back Figure 3 In the current state, the feed inlet 304 and the feed outlet 305 are blocked by the baffle 302, and the food in the food compartment 4 is replenished into the transition cavity.

[0069] By adjusting the two rotating plates through two rotations, the food bin 4 can be quantitatively replenished into the transition cavity, thus ensuring that the amount of food entering the temporary storage cavity each time is quantitative, making it easier to control variables and ensuring that the amount of food rewarded each time is the same.

[0070] like Figure 5 During the process of the rotating plate rotating halfway, some food will fall from the gap between the rotating plate and the inner wall of the food compartment 4. At this time, the baffle 302 still blocks the feeding port 305. This part of the food will accumulate in the feeding port 305. When the temporary storage chamber is connected to the feeding port 305, it will enter the temporary storage chamber. The advantage of the baffle 302 design is that it can prevent food from entering during the rotation process. It takes into account the leakage of the rotating plate and allows the leaked part of the food to also enter the temporary storage chamber.

[0071] In addition, the food compartment 4 stores far more food than the temporary storage chamber and the transition chamber, and can be replenished multiple times. When the rotating plate is horizontal, it forms a sealed structure with the hollow channel, blocking the hollow channel.

[0072] Furthermore, the drive unit includes a motor, a first driven wheel 6, and a second driven wheel 7;

[0073] The output end of the motor is connected to the first driven wheel 6 and the second driven wheel 7. The first driven wheel 6 is fixedly connected to the end of the main shaft 303, and the second driven wheel 7 is connected to the two rotating plates.

[0074] Furthermore, rotating shafts are fixedly connected to the two rotating plates respectively, and the two rotating shafts pass through the food compartment 4 and are fixedly connected to the upper gear 11 and the lower gear 10 respectively;

[0075] The second driven wheel 7 is fixedly connected to the end face of the cam 701. The cam 701 is rotatably connected to the outer side of the food compartment 4. The circumferential surface of the cam 701 abuts against the bottom of the slide bar 8. The top of the slide bar 8 is connected to the return spring 13, thereby forming a cam mechanism. The side of the slide bar 8 is fixedly connected to the rack that meshes with the upper gear 11 and the lower gear 10.

[0076] When the motor drives the cam 701 to rotate, the upper rotating plate 401 and the lower rotating plate 402 rotate 90° each time.

[0077] Specifically, cam 701 can be a regular cam or an elliptical cam with two small diameter ends. When a regular cam is used (not shown in the figure), its motor drives the regular cam to rotate 180° each time; thus, during the two rotations of the motor, when an elliptical cam is used (shown in the figure), its motor drives the regular cam to rotate 90° each time; regardless of the type of cam, the slide bar 8 moves twice, and the rotating plate rotates 90° twice.

[0078] A pressure block 12 is fixedly connected to the slide rod 8. The top of the slide rod 8 can slide through the fixed block 14, which is located above the pressure block 12. The return spring 13 is located between the fixed block 14 and the pressure block 12 and is sleeved on the slide rod 8. The return spring 13 is always in a compressed state, pushing the pressure block 12 and the slide rod 8 downward to realize the return function of the slide rod 8. The bottom of the slide rod 8 is rotatably connected to the roller 9, which is always in contact with the circumferential surface of the cam 701.

[0079] Through the design of the cam mechanism, slide bar 8, upper gear 11 and lower gear 10, it is possible to drive two rotating plates to rotate simultaneously.

[0080] In addition, the output end of the motor is fixedly connected to the drive wheel 5, and the drive wheel 5 can be connected to the first and second driven wheels via a synchronous belt.

[0081] Furthermore, it also includes LED lights and a buzzer. When the pressing component 1 fails to meet the cooperative task triggering requirements, the LED lights flash and the buzzer plays a sound. Failing to meet the cooperative task triggering requirements means that multiple pressing components 1 are not pressed simultaneously within the same time window.

[0082] It also includes a partition wall 2, a discharge port 304 passing through the partition wall 2, and a pressing component 1 and a cylinder 3 located on both sides of the partition wall 2, thereby separating the experimental area and the feeding area.

[0083] In addition, LED lights and buzzers can be installed on the isolation wall 2.

[0084] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any modifications, alterations, substitutions, or variations made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. A method for cooperative experimentation in non-human primates, comprising, The method comprises the following steps: Step 1: Write the required cooperation logic code using open source single chip microcomputer code editing software, and burn it to the circuit board; Step 2: Start the animal cooperation experiment device; Step 3: Animal operation presses the part (1); Step 4: Determine the triggering condition of the pressing part (1), if it meets the cooperation logic, the cooperation experiment device outputs food, otherwise it outputs a punitive content; the punitive content includes but is not limited to LED light flashing and buzzer playing sound; Step 5: Reset the animal cooperation experiment device; Wherein, multiple pressing parts (1) are provided, and the triggering condition of the pressing part (1) meeting the cooperation logic is that multiple pressing parts (1) are pressed simultaneously within a time window; Wherein, the experiment device comprises a pressing part (1), a cylinder (3), a food bin (4) and a driving part; The cylinder (3) is horizontally arranged in the axial direction, one side of the cylinder (3) is connected with the food bin (4), the other side of the cylinder (3) is provided with a discharge port (304), a plurality of partitions (301) are arranged in the cylinder (3), the plurality of partitions (301) are distributed around the axis of the cylinder (3), and a temporary storage cavity is formed between adjacent two partitions (301), the discharge port (304) is connected with one of the temporary storage cavities, the food bin (4) is connected with another temporary storage cavity, and the inner sides of the plurality of partitions (301) are fixedly connected with a main shaft (303); A rotating plate is rotatably arranged in the food bin (4) to control the output of food; The driving part is connected with the main shaft (303) and the rotating plate, the driving part is used for driving the main shaft (303) and the rotating plate to rotate at the same time, and the angle of each rotation of the main shaft (303) is the included angle between adjacent two partitions (301), so that the temporary storage cavities alternately pass through the discharge port (304); a plurality of pressing parts (1) are provided, the plurality of pressing parts (1) are connected with the driving part, when the plurality of pressing parts (1) are pressed at the same time, the driving part drives the main shaft (303) and the rotating plate to rotate, so that the food is discharged from the discharge port (304), and the food in the food bin (4) is input into the temporary storage cavity; The rotating plate comprises two parts, an upper rotating plate (401) and a lower rotating plate (402), and a transition cavity is formed between the lower side of the upper rotating plate (401) and the upper side of the lower rotating plate (402); A plurality of baffles (302) are arranged in the cylinder (3), when one of the baffles (302) blocks the discharge port (304), the lower rotating plate (402) is horizontally arranged, and the upper rotating plate (401) is vertically arranged, so that the food in the food bin (4) enters the transition cavity; When one of the temporary storage cavities is connected with the discharge port (304), the lower rotating plate (402) is vertically arranged, and the upper rotating plate (401) is horizontally arranged, so that the food in the transition cavity enters the temporary storage cavity; The two rotating plates rotate 90° each time under the driving of the driving part; The driving part comprises a motor, a first driven wheel (6) and a second driven wheel (701). The output end of the motor is connected with a first driven wheel (6) and a second driven wheel (701), the first driven wheel (6) is fixedly connected with the end of the main shaft (303), and the second driven wheel (701) is connected with the two rotating plates; Two rotating shafts are fixedly connected with the two rotating plates respectively, the two rotating shafts pass through the food bin (4) and are fixedly connected with the upper gear (11) and the lower gear (10) respectively; The second driven wheel (701) is fixedly connected with the end face of the cam (7), the cam (7) is rotatably connected with the outer side of the food bin (4), the peripheral surface of the cam (7) abuts against the bottom of the slide rod (8), the top of the slide rod (8) is connected with the return spring (13), so as to form a cam mechanism, and the side surface of the slide rod (8) is fixedly connected with the rack engaged with the upper gear (11) and the lower gear (10); When the motor drives the cam (7) to rotate each time, the upper rotating plate (401) and the lower rotating plate (402) rotate 90° each time.

2. The method of claim 1, wherein: The baffle (302) is fixedly connected with the outer sides of two adjacent partition plates (301), so as to close the temporary storage cavities, a plurality of the baffles (302) are distributed at intervals in the circumferential direction of the main shaft (303), so that the temporary storage cavities on both sides of the baffle (302) are of an open structure; When a plurality of the pressing components (1) are pressed simultaneously, the driving part drives the main shaft (303) and the rotating plate to rotate twice.

3. The method of claim 1, wherein: The bottom of the food bin (4) is fixedly provided with a hollow channel, the two rotating plates are located in the hollow channel, and the size of the rotating plate is matched with the hollow channel, so that the hollow channel is blocked when the rotating plate is arranged horizontally; The side, away from the discharge port (304), of the barrel (3) is fixedly provided with a charging port (305), the charging port (305) is fixedly connected with the outer side of the food bin (4) and communicates with the hollow channel, and the connecting part is located below the lower rotating plate (402); The charging port (305) and the discharge port (304) are blocked by two baffles (302) simultaneously or are communicated with two temporary storage cavities simultaneously.

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