A smart interactive teaching robot that triggers prompts based on randomly selected questions

Abstract

This invention belongs to the field of robotics technology, specifically an intelligent interactive teaching robot that triggers prompts based on random topic selection. It aims to solve the problems of existing teaching robots that rely on electronic programs for random topic selection and have complex robotic arm deployment structures. The robot includes a robot body with a turntable inside. The turntable has a mounting slot for mounting a card. The turntable rotates and randomly stops due to inertia via intermittent meshing of an incomplete gear and gear I, achieving random topic selection from the card. The positioning mechanism includes a positioning slot, a sliding rod, and a ball. The robotic arm is connected via a rotating rod with gear II. The turntable contains an air chamber and piston plate I, and the rotating chamber contains an air box and piston plate II. When the ball is engaged in the positioning slot, piston plate I forces air into the air box, pushing piston plate II and the rack upwards, causing gear II and the robotic arm to rotate and deploy. This robot can deploy its robotic arm pneumatically while randomly selecting topics, without requiring an additional motor drive.

Description

Technical Field

[0001] This invention relates to the field of robotics, and more particularly to an intelligent interactive teaching robot that triggers prompts based on randomly selected topics. Background Technology

[0002] In the field of robotics education, especially in intelligent educational robot products targeting children or students, random question selection is a common method to enhance the fun and challenge of learning. Existing interactive educational robots typically display questions on electronic screens or read digitized question banks via built-in memory cards. This method of question selection, which relies on purely electronic systems, has the following problems: The question bank needs to be updated or replaced via data cable, network download or memory card replacement. The operation process is relatively complicated for young users or teachers without technical background, and it is not convenient for the instant replacement and physical display of teaching content. During the question selection and answering process, user interaction is mostly limited to touchscreens or remote controls, lacking the tactile feedback and sense of ritual of physical operation. The robot's feedback actions are also relatively simple, such as relying solely on screen lights or voice prompts, which is insufficient to fully stimulate user enthusiasm. When existing robots randomly select topics, the positioning accuracy of their mechanical structure and the logic of triggering actions rely on complex sensors and program control. Once a program error or sensor failure occurs, it can easily lead to misselection of topics or failure of actions. The stability and maintainability of the system need to be improved. Some devices with physical card operation functions have complex card installation, fixing and retrieval mechanisms, which can easily lead to card jamming or difficulty in retrieval, affecting the user experience.

[0003] Therefore, it is necessary to provide a new interactive teaching robot to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing teaching robots that rely on electronic programs for random topic selection and have complex robotic arm deployment structures, and to propose an intelligent interactive teaching robot that triggers prompts based on random topic selection.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A smart interactive teaching robot that triggers prompts based on randomly selected questions includes: The robot body and multiple pallets are provided. The robot body has a rotating chamber inside, and the top of the robot body has an opening that communicates with the rotating chamber. A rotating shaft is rotatably connected within the rotating chamber; A turntable is fixedly sleeved on the outer wall of the rotating shaft. The turntable is provided with multiple sets of mounting mechanisms arranged in a ring around the rotating shaft. Each mounting mechanism includes a mounting groove for mounting a card plate, and the mounting groove is located on one side of the turntable. A positioning mechanism for positioning the turntable includes a plurality of positioning grooves arranged in a ring on the side of the turntable near the mounting groove, the positioning grooves corresponding to the position of the mounting groove; An image acquisition device is fixed to one inner wall of the rotating chamber and is used to photograph the card plate after the turntable is positioned. Two robotic arms are mounted on one side of the robot body, and buttons are fixed to the bottom of each robotic arm. A rotating rod is rotatably connected to the robot body, and both robotic arms are fixedly sleeved on the outer wall of the rotating rod; and... A rotating mechanism is used to drive the robotic arm to rotate to a horizontal position when the turntable is positioned.

[0006] In one possible design, the rotating mechanism includes an air box fixed to the inner wall of the rotating chamber near the robotic arm. The air box is slidably engaged with one side of the turntable. A piston plate II is slidably connected inside the air box. A rack is fixed to the top of the piston plate II and slidably passes through the top inner wall of the air box. A gear II that meshes with the rack is fixedly sleeved on the outer wall of the rotating rod. A through hole is provided on the side of the air box away from the robotic arm, located below the piston plate II. A driving mechanism is provided inside the turntable. The driving mechanism cooperates with the through hole to inject air into the air box through the through hole to drive the piston plate II to move upward, thereby driving the rack to rotate the gear II and the rotating rod, so that the robotic arm moves out of the receiving slot.

[0007] In one possible design, the positioning mechanism further includes a fixed cylinder fixed to the inner wall of the rotating chamber on the side away from the robotic arm. A slide rod is slidably connected inside the fixed cylinder. A spring III is fixed between the end of the slide rod away from the robotic arm and the inner wall of the fixed cylinder. A ball is rolled on the end of the slide rod near the robotic arm through a ball socket. The ball corresponds to the positioning groove. When the rotation speed of the turntable decreases, the slide rod moves towards the turntable under the elastic force of the spring III, causing the ball to extend into the positioning groove to position the turntable.

[0008] In one possible design, the drive mechanism includes multiple air chambers arranged in a ring within the turntable. Each air chamber corresponds to a positioning groove. A piston plate I is slidably connected within each air chamber. A push rod is fixed to the side of the piston plate I closest to the positioning groove. One end of the push rod extends slidably into the positioning groove. A tension spring IV, sleeved on the outer wall of the push rod, is fixed between the piston plate I and the inner wall of the air chamber. An air passage is provided at the end of the air chamber furthest from the positioning groove. This air passage mates with a through hole. When the ball extends into the positioning groove, the air passage and the through hole are aligned. The ball pushes the push rod and the piston plate I to move, injecting air from the air chamber into the air box sequentially through the air passage and the through hole, thereby driving the robotic arm to rotate.

[0009] In one possible design, the mounting mechanism further includes a slide block slidably connected within the mounting groove. Multiple springs I are fixed between the slide block and the inner wall of the mounting groove. Two wedge blocks I slidably pass through one side of the mounting groove, with the inclined surfaces of both wedge blocks I facing away from the rotating shaft. A guide rod I is fixed to the side of the turntable away from the mounting groove. A connecting plate is slidably sleeved on the outer wall of the guide rod I. The ends of both wedge blocks I away from the mounting groove are fixedly connected to the connecting plate. A tension spring I is fixed between the connecting plate and the turntable, sleeved on the outer wall of the guide rod I. When the locking plate is inserted into the mounting groove, the locking plate pushes the wedge blocks I to move. After the locking plate is completely below the wedge blocks I, the tension spring I drives the wedge blocks I to reset and abut against the top of the locking plate to position the locking plate.

[0010] In one possible design, an unlocking mechanism is also included. The unlocking mechanism comprises two bases I arranged vertically and vertically, fixed to the inner wall of the rotating chamber near the robotic arm. A guide rod II is fixed between the two bases I. A lever is slidably fitted on the outer wall of the guide rod II. The lever extends to the outside of the robot body through a slide rail located on one side of the robot body. A tension spring II is fixed between the bottom of the lever and the top of the base I located below, and fitted on the outer wall of the guide rod II. Two wedge blocks II are fixed on the side of the guide rod II away from the lever. The inclined surface of the wedge block II cooperates with the connecting plate. When the lever is moved upward, the inclined surface of the wedge block II drives the connecting plate and the wedge block I to move, releasing the restriction on the locking plate. The locking plate moves out of the opening under the elastic force of the spring I.

[0011] In one possible design, multiple fixed sleeves arranged in a ring are fixed to the side of the turntable near the robotic arm. A sliding push plate is slidably connected inside each fixed sleeve. A tension spring III is fixed between the sliding push plate and the inner wall of the fixed sleeve. The robot body has a guide groove communicating with the rotating chamber. A sliding plate is slidably connected inside the guide groove. The sliding plate is located below the fixed sleeve. A spring II is fixed between the bottom of the sliding plate and the inner wall of the guide groove. A stationary contact plate is fixed to the bottom of the sliding plate. A movable contact plate located below the stationary contact plate is fixed inside the guide groove. An electromagnet is fixed to the inner wall of the fixed sleeve. The end of the sliding rod near the spring III is... A permanent magnet is fixed, and the electromagnet is electrically connected to the permanent magnet. When the stationary contact plate touches the moving contact plate, the electromagnet is energized. When the turntable rotates, the sliding push plate drives the sliding plate to move downward under the action of centrifugal force, so that the stationary contact plate contacts the moving contact plate. The electromagnet is energized and generates a magnetic attraction force with the permanent magnet, which drives the sliding rod to retract into the fixed cylinder. After the turntable speed decreases, the sliding push plate returns to its original position under the action of the tension spring III, and the sliding plate moves upward under the action of the elastic force of the spring II, so that the stationary contact plate and the moving contact plate are disconnected. The electromagnet is de-energized, and the sliding rod extends under the action of the elastic force of the spring III, so that the ball is aligned with the positioning groove.

[0012] In one possible design, an incomplete gear is rotatably connected to the inner wall of the rotating chamber on the side away from the robotic arm. The robot body is equipped with a motor for driving the rotation of the incomplete gear. Gear I is fixedly sleeved on the outer wall of the rotating shaft. Gear I intermittently meshes with the incomplete gear. The incomplete gear drives gear I and the turntable to rotate, and disengages from gear I after rotating several times. Gear I, the rotating shaft, and the turntable continue to rotate under inertia to randomly select the card plate.

[0013] In one possible design, the image acquisition device is located on the inner wall of the rotating chamber on the side away from the robotic arm. A touch screen and two speakers are fixed on one side of the robot body. A controller is located inside the robot body. The controller is electrically connected to the touch screen, the speakers, the buttons, and the image acquisition device. The image acquisition device captures the questions and answers on the card plate and displays the question content on the touch screen. At the same time, the speakers broadcast the questions.

[0014] In one possible design, a tension spring V is fixed between the bottom of the piston plate II and the bottom inner wall of the air box. The tension spring V is used to apply a downward pulling force to the piston plate II to prevent the robotic arm from moving out of the receiving slot when the robot body is being transported.

[0015] Beneficial effects: In this invention, during the installation of the cardboard by the robot, by setting up a detachable cardboard and an installation mechanism with spring I and wedge I, the user can quickly and firmly install the physical teaching card onto the turntable inside the robot. The installation and removal of the cardboard does not require tools, the operation is intuitive, and it is convenient for the physical management and flexible replacement of teaching content. In this invention, when the robot selects a topic, it utilizes the intermittent meshing of the incomplete gear and gear I, as well as the inertial rotation of the turntable, to achieve purely mechanical random topic selection. Compared to the method that relies on a software random number generator, this mechanical random method has higher repeatability and anti-interference ability. Moreover, after the incomplete gear disengages from gear I, the stop position of the turntable depends entirely on the random balance between its rotational inertia and friction, making the result unpredictable and enhancing the fairness of topic selection. In this invention, during the robot's operation and topic selection and positioning process, the ball, spring III, and positioning groove in the positioning mechanism can accurately position the turntable at the moment it stops, ensuring that the image acquisition device can accurately capture the complete content on the card each time, avoiding image recognition errors caused by positioning deviations, and improving the reliability of the system. In this invention, when the robotic arm is extended to provide a prompt function, the mechanical energy of the turntable when it stops is used to push the push rod and piston plate I through the ball, which in turn compresses the air in the air chamber into the air box, driving piston plate II, rack and pinion II, and finally realizing the automatic extension of the robotic arm. No additional motor or sensor is required. The action of the interactive components is triggered entirely by the energy of the mechanical motion itself, which reduces power consumption and manufacturing costs, and reduces electronic failure points. In this invention, the turntable needs to be positioned during the robot's topic selection process. By setting up a sliding push plate, a sliding plate, an electromagnet, and a permanent magnet, intelligent control of the positioning timing is achieved. When the turntable rotates at high speed, the electromagnet is energized, locking the ball inside the fixed cylinder to prevent friction and noise between the ball and the turntable. When the turntable speed decreases to a preset threshold, the electromagnet is automatically de-energized, the ball is released, and the positioning is completed. This effectively distinguishes between the rotation state and the positioning state, ensuring the smoothness of the turntable rotation process and the accuracy of the positioning. In this invention, the unfolding prompt and skip functions of the buttons on the robotic arm are associated with the random topic selection process. After the user presses the skip button, the robot automatically reselects a topic. After pressing the prompt button, auxiliary information is obtained. This multimodal interaction method enriches the levels of teaching interaction, can adapt to users with different learning habits, and enhances the fun and participation of the teaching process. In this invention, when the robotic arm is stably stored, the tension spring V inside the air box provides a continuous downward pulling force to the piston plate II, ensuring that the robotic arm can be stably stored in the receiving slot when not in use. This prevents the robotic arm from accidentally extending and causing damage to the robot body during movement or transportation, and improves the portability and durability of the product.

[0016] In this invention, the turntable is driven to rotate randomly through the intermittent meshing of incomplete gears. Precise stopping and locking of the turntable is achieved through the cooperation of a sphere, spring, and positioning groove. Mechanical energy is converted into pneumatic energy using an air chamber and piston, driving the robotic arm to automatically unfold. This allows users to operate prompts or skip buttons. Furthermore, a physical cardboard is used as a knowledge carrier, combined with image acquisition and voice broadcasting, providing a complete interactive teaching process from random topic selection, mechanical positioning, interactive component unfolding, to multimedia feedback. The cardboard installation and removal mechanism is easy to operate, and the positioning timing is automatically controlled by centrifugal and electromagnetic mechanisms, effectively avoiding rotational interference. The entire system is primarily mechanically linked, supplemented by electronic control, with a reliable structure and clear logic, reducing manufacturing costs and enhancing the fun and practicality of interactive teaching. Attached Figure Description

[0017] Figure 1 A three-dimensional structural diagram of an intelligent interactive teaching robot with random topic selection and prompting provided by the present invention; Figure 2 A first-view three-dimensional structural diagram of the robot body of an intelligent interactive teaching robot with random topic selection and prompting provided by the present invention; Figure 3 This is a second-view three-dimensional structural diagram of the robot body of an intelligent interactive teaching robot with random topic selection and prompting provided by the present invention. Figure 4 A three-dimensional exploded view of the turntable, fixed sleeve, and robotic arm of an intelligent interactive teaching robot with random topic selection triggering prompts provided by the present invention. Figure 5 A three-dimensional exploded view of the card plate, slide, and turntable of an intelligent interactive teaching robot with random topic selection triggering prompts provided by the present invention; Figure 6 A three-dimensional exploded structural diagram of wedge block I, wedge block II, and tension spring II of an intelligent interactive teaching robot with random topic selection triggering prompts provided by the present invention; Figure 7 This is a three-dimensional exploded view of the fixed sleeve, sliding push plate, and sliding plate components of an intelligent teaching interactive robot with random topic selection triggering prompts provided by the present invention. Figure 8A three-dimensional exploded view of the robotic arm, sliding plate, and guide rod III of an intelligent interactive teaching robot with random topic selection triggering prompts provided by the present invention; Figure 9 A three-dimensional cross-sectional view of the turntable of an intelligent interactive teaching robot with random topic selection and prompting provided by the present invention. Figure 10 for Figure 9 Enlarged structural diagram at point A in the middle; Figure 11 This is a three-dimensional cross-sectional structural diagram of the air chamber of an intelligent interactive teaching robot with random topic selection and prompting provided by the present invention.

[0018] In the diagram: 1. Robot body; 2. Rotating chamber; 3. Rotating shaft; 4. Turntable; 5. Gear I; 6. Incomplete gear; 7. Mounting slot; 8. Slide; 9. Spring I; 10. Clamping plate; 11. Guide rod I; 12. Connecting plate; 13. Wedge I; 14. Tension spring I; 15. Base I; 16. Guide rod II; 17. Pulley; 18. Tension spring II; 19. Wedge II; 20. Fixing sleeve; 21. Sliding plate; 22. Tension spring III; 23. Guide groove; 24. Slide plate; 25. Guide rod III; 26. Spring II; 27. Base II 28. Static contact plate; 29. ​​Moving contact plate; 30. Fixed cylinder; 31. Slide rod; 32. Spring III; 33. Permanent magnet; 34. Electromagnet; 35. Sphere; 36. Positioning groove; 37. Air chamber; 38. Piston plate I; 39. Push rod; 40. Tension spring IV; 41. Air passage; 42. Air box; 43. Through hole; 44. Piston plate II; 45. Tension spring V; 46. Rack; 47. Rotating rod; 48. Gear II; 49. Receiving groove; 50. Robotic arm; 51. Button; 52. Touch screen; 53. Speaker; 54. Image acquisition device. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] In one embodiment: Refer to Figure 1 , Figure 2 , Figure 5 and Figure 8A smart interactive teaching robot that triggers prompts by randomly selecting questions, relating to the field of robot technology, mainly includes a robot body 1 and multiple cardboards 10. One side of each cardboard 10 is marked with teaching questions and corresponding answers. The cardboard 10 serves as a physical carrier of teaching content, and its material can be rigid cardboard or thin plastic board. Two robotic arms 50 are provided on one side of the robot body 1. Buttons 51 are fixedly installed at the bottom of each of the two robotic arms 50. The two buttons 51 are respectively used as a prompt button and a skip button.

[0021] Reference Figure 2 , Figure 4 and Figure 5 The robot body 1 has a rotating chamber 2 inside. An image acquisition device 54 is fixed on one inner wall of the rotating chamber 2. The image acquisition device 54 can be a miniature camera module. The top of the robot body 1 has an opening that communicates with the rotating chamber 2, so that the card plate 10 can be inserted into the rotating chamber 2. A rotating shaft 3 is rotatably connected inside the rotating chamber 2. A turntable 4 is fixedly sleeved on the outer wall of the rotating shaft 3. The turntable 4 has multiple sets of mounting mechanisms for mounting the card plate 10. The multiple sets of mounting mechanisms are arranged in a ring around the rotating shaft 3. The mounting mechanism includes a mounting groove 7 set on one side of the turntable 4. The card plate 10 is inserted into the mounting groove 7. The mounting groove 7 is located on the side of the turntable 4 away from the robotic arm 50.

[0022] Reference Figures 4-6 The installation mechanism also includes a slide block 8 that slides in the installation groove 7. A plurality of springs I9 are fixed to the side of the slide block 8 near the rotating shaft 3 via spring seats. The ends of the multiple springs I9 away from the slide block 8 are all fixedly connected to the inner wall of the installation groove 7 via spring seats. Two inclined wedges I13 slide through one side of the installation groove 7. The inclined surfaces of the two inclined wedges I13 face away from the rotating shaft 3. A guide rod I11 is fixed to the side of the turntable 4 away from the installation groove 7. A connecting plate 12 is slidably sleeved on the outer wall of the guide rod I11. The ends of the two inclined wedges I13 away from the installation groove 7 are all fixedly connected to the connecting plate 12. A tension spring I14 is fixed to the side of the connecting plate 12 that is close to the turntable 4 via spring seats. The tension spring I14 is sleeved on the outer wall of the guide rod I11.

[0023] Specifically, when the clamping plate 10 is inserted into the mounting groove 7 from above, the bottom of the clamping plate 10 abuts against the inclined surface of the wedge block I13 and pushes the wedge block I13 and the connecting plate 12 to move away from the mounting groove 7. At this time, the tension spring I14 is in a stretched state until the clamping plate 10 abuts against the slide block 8 and squeezes the spring I9. The clamping plate 10 is completely below the wedge block I13. At this time, the tension of the tension spring I14 drives the wedge block I13 and the connecting plate 12 to reset. The bottom of the wedge block I13 abuts against the top of the clamping plate 10 to position the clamping plate 10 and complete the installation of the clamping plate 10. The elastic force of the spring I9 keeps the top edge of the clamping plate 10 in close contact with the bottom surface of the wedge block I13 to prevent the clamping plate 10 from shaking.

[0024] Reference Figure 1 , Figure 2 and Figure 6 The robot also includes an unlocking mechanism for removing the card plate 10 from the mounting slot 7 when necessary. The unlocking mechanism includes two bases I 15 arranged vertically on the inner wall of the rotating chamber 2 near the robotic arm 50. A guide rod II 16 is fixed between the two bases I 15. A lever 17 is slidably sleeved on the outer wall of the guide rod II 16. A slide rail connected to the rotating chamber 2 is provided on one side of the robot body 1, and the lever 17 extends to one side of the robot body 1 through the slide rail. A tension spring II 18 is fixed between the bottom of the lever 17 and the top of the base I 15 below it through a spring seat. The tension spring II 18 is sleeved on the outer wall of the guide rod II 16 and is used to pull the lever 17 down to reset. Two wedges II 19 are fixed on the side of the guide rod II 16 away from the lever 17. The inclined surface of the wedges II 19 is located on the side of the top of the wedges II 19 near the lever 17, and the inclined surface of the wedges II 19 cooperates with the connecting plate 12.

[0025] Specifically, when it is necessary to remove the card plate 10, the user's finger rotates the turntable 4 through the opening until the card plate 10 is directly below the opening. Then, the user moves the lever 17 upward and stretches the tension spring II 18. The guide rod II 16 drives the wedge block II 19 upward. The inclined surface of the wedge block II 19 contacts the connecting plate 12. As the wedge block II 19 continues to move upward, its inclined surface drives the connecting plate 12 to move away from the mounting groove 7. The connecting plate 12 drives the wedge block I 13 to move synchronously, releasing the wedge block I 13 from limiting the top of the card plate 10. At this time, the card plate 10 bounces upward under the elastic force of the spring I 9, and its top moves a distance out of the opening, making it easy for the user to pinch the card plate 10 with their fingers and remove it completely. After the user releases the lever 17, the tension of the tension spring II 18 pulls the lever 17, the guide rod II 16 and the wedge block II 19 back to their original positions.

[0026] Reference Figures 2-4An incomplete gear 6 is rotatably connected to the inner wall of the rotating chamber 2 on the side away from the robotic arm 50. The robot body 1 is equipped with a motor for driving the rotation of the incomplete gear 6. The motor is electrically connected to the controller. The output shaft of the motor can be directly or through a reduction gear set connected to the axis of the incomplete gear 6. Gear I5 is fixedly sleeved on the outer wall of the rotating shaft 3, and gear I5 and the incomplete gear 6 are intermittently meshed. After the controller receives the signal from the user pressing the skip button, it controls the motor to start and drive the incomplete gear 6 to rotate. The incomplete gear 6 drives gear I5 and the rotating shaft 3 to rotate. The number of teeth of the incomplete gear 6 is designed so that after rotating a few times, its toothed part disengages from gear I5. At this time, the incomplete gear 6 continues to rotate freely, while gear I5, rotating shaft 3 and turntable 4 continue to rotate freely under the action of inertia. Due to the rotational inertia of the turntable 4 and the small friction between the rotating shaft 3 and the rotating chamber 2, the turntable 4 will eventually stop rotating. The timing of the disengagement of the incomplete gear 6 from gear I5 is random, thereby realizing the random topic selection function.

[0027] Reference Figure 1 , Figure 2 , Figure 4 and Figure 8 An image acquisition device 54 is installed on the inner wall of the rotating chamber 2 away from the robotic arm 50. A touch screen 52 and two speakers 53 are fixed on one side of the robot body 1. A controller is installed inside the robot body 1. The controller is electrically connected to the touch screen 52, speakers 53, buttons 51 and the image acquisition device 54. The controller can be a microcontroller or an embedded microprocessor. The image acquisition device 54 can capture the questions, correct answers and alternative answers on the card plate 10 and display the question content and alternative answers on the touch screen 52. At the same time, the speakers 53 broadcast the questions and alternative answers. Users can use the corresponding prompt buttons as needed. After selecting a prompt button, the controller will display the prompt content pre-stored in the internal memory or obtained through image recognition on the touch screen 52. When the user uses another skip button, the controller can drive the turntable 4 to rotate and randomly select questions again. In addition, users can also answer questions by touch on the touch screen 52, such as by tapping the answer on the touch screen 52. The controller will compare the received answer with the correct answer captured by the image acquisition device 54 and give a judgment of right or wrong.

[0028] Reference Figure 1 , Figure 2 , Figure 4 and Figure 8The controller is electrically connected to both the motor and the electromagnet 34. The controller is configured to: in response to receiving a skip command or a topic selection command, control the motor to start, driving the incomplete gear 6 to rotate; and control the electromagnet 34 to be energized when the stationary contact 28 and the moving contact 29 are in contact, and control the electromagnet 34 to be de-energized when the stationary contact 28 and the moving contact 29 are disconnected. Alternatively, the electromagnet 34 can be directly connected in series in the electrical circuit containing the stationary contact 28 and the moving contact 29, and its energization can be directly controlled by the mechanical on / off state of the stationary contact 28 and the moving contact 29.

[0029] Reference Figure 3 and Figure 4 The robot body 1 is equipped with a rotating mechanism, which drives the robotic arm 50 to rotate to a horizontal position when positioning the turntable 4. The driving mechanism includes a rotating rod 47 that rotates inside the robot body 1, and both robotic arms 50 are fixedly sleeved on the outer wall of the rotating rod 47.

[0030] Reference Figures 2-4 and Figure 11 The rotating mechanism also includes two receiving slots 49 located on the side of the robot body 1 near the robotic arm 50. The two ends of the rotating rod 47 are rotatably connected to the inner walls of the two receiving slots 49 on opposite sides. The robotic arm 50 is located within the corresponding receiving slot 49. In the initial state, the robotic arm 50 is completely retracted into the receiving slot 49, keeping the robot body 1 clean and preventing damage to the robotic arm 50 during handling or non-use. An air box 42 is fixed to the inner wall of the rotating chamber 2 near the robotic arm 50, and the air box 42 is located above the rotating shaft 3. The air box 42 slides in cooperation with one side of the turntable 4, meaning that one side surface of the turntable 4 is in contact with the air box. There is a gap between the sides of the air box 42, but they can slide relative to each other. A piston plate II 44 is slidably connected inside the air box 42. A rack 46 is fixed on the top of the piston plate II 44. The top of the rack 46 slides through the top inner wall of the air box 42. A gear II 48 is fixedly sleeved on the outer wall of the rotating rod 47. The rack 46 meshes with the gear II 48. A through hole 43 is provided on the side of the air box 42 away from the robotic arm 50, located below the piston plate II 44. A drive mechanism is provided inside the turntable 4 to drive the piston plate II 44 to move upward, thereby driving the robotic arm 50 to rotate. The drive mechanism cooperates with the through hole 43 to inject air into the air box 42 through the through hole 43.

[0031] Specifically, when the drive mechanism injects air into the air box 42 through the through hole 43, the air pressure in the air box 42 below the piston plate II 44 increases, pushing the piston plate II 44 to move upward. The piston plate II 44 pushes the rack 46 to move upward, and the meshing of the rack 46 with the gear II 48 drives the rotating rod 47 to rotate counterclockwise. The rotating rod 47 drives the two robotic arms 50 to rotate outward from the receiving slot 49 until the robotic arms 50 rotate to a horizontal or near-horizontal state. At this time, the user can easily touch the button 51 at the bottom of the robotic arm 50. This pure mechanical pneumatic drive method avoids the logical errors or response delays that may occur when the robotic arms 50 rely on program control.

[0032] Reference Figure 4 and Figure 5 The robot also includes a positioning mechanism for positioning the turntable 4, so that the image acquisition device 54 can accurately capture images of the card plate 10. The positioning mechanism includes multiple positioning slots 36 arranged in a ring on the side of the turntable 4 near the mounting slot 7, and the positioning slots 36 correspond to the positions of the mounting slot 7.

[0033] Reference Figure 2 , Figure 5 , Figure 9 and Figure 10 The positioning mechanism also includes a fixed cylinder 30 fixed to the inner wall of the rotating chamber 2 on the side away from the robotic arm 50. A slide rod 31 is slidably connected inside the fixed cylinder 30. A spring 32 is fixed between the end of the slide rod 31 away from the robotic arm 50 and the inner wall of the fixed cylinder 30 via a spring seat. A ball 35 is rolled on the end of the slide rod 31 near the robotic arm 50 via a ball socket. The ball 35 can be made of steel and corresponds to the positioning groove 36. When the turntable 4 continues to rotate under inertia and the rotation... As the speed gradually decreases, the angular velocity of the turntable 4 decreases. At this time, the centrifugal force of the drive slide bar 31 disappears, and the slide bar 31 moves towards the turntable 4 under the elastic force of the spring III 32. The ball 35 can roll into the positioning groove 36. Since the positioning groove 36 corresponds to the mounting groove 7, when the ball 35 is inserted into a certain positioning groove 36, the turntable 4 is precisely locked. At this time, the center of the field of view of the image acquisition device 54 is exactly aligned with the card plate 10 corresponding to the positioning groove 36, ensuring clear and complete image acquisition.

[0034] Reference Figure 2 , Figure 9 and Figure 10The drive mechanism includes multiple air chambers 37 arranged in a ring within the turntable 4, with each air chamber 37 corresponding to a positioning groove 36. A piston plate I 38 is slidably connected within each air chamber 37. A push rod 39 is fixed to the side of the piston plate I 38 near the positioning groove 36, with one end of the push rod 39 slidably extending into the positioning groove 36. The end of the push rod 39 has an arc-shaped concave surface that matches the ball 35. The initial position of the push rod 39 is at the bottom of the positioning groove 36. After the ball 35 is fully seated at the bottom of the positioning groove 36, the ball 35 abuts against the arc-shaped concave surface and pushes the push rod 39. A tension spring IV40 is fixed to the side of piston plate I 38 near the push rod 39 via a spring seat. The end of tension spring IV40 away from piston plate I 38 is fixedly connected to the inner wall of the corresponding air chamber 37 via the spring seat. Tension spring IV40 is sleeved on the outer wall of push rod 39 and is used to pull piston plate I 38 back to the positioning groove 36. An air passage 41 is provided at the end of air chamber 37 away from positioning groove 36, and the end of air passage 41 away from positioning groove 36 cooperates with through hole 43 to inject air into air box 42 to move piston plate II 44 upward. The volume of air chamber 37 is greater than the volume of air box 42. To prevent the ball 35 from sliding into the positioning groove 36 before the turntable 4 has completely stopped rotating, causing a rigid mechanical impact, the opening edge of the positioning groove 36 is provided with a bidirectional guide ramp (not shown in the figure). In addition, the inner end of the fixed cylinder 30 is provided with a damping ring (not shown in the figure) for axially limiting the slide rod 31. The damping absorbs the single-point hard collision energy of the ball 35 in the inertial state, ensuring a smooth transition in the positioning process and the durability of the device.

[0035] Specifically, when the ball 35 extends into the positioning groove 36 to position the turntable 4, the air passage 41 and the through hole 43 are aligned. Under the elastic force of the spring III 32, the ball 35 pushes the push rod 39. The push rod 39 pushes the piston plate I 38 to move away from the positioning groove 36. The tension spring IV 40 is in a stretched state. Since the volume of the air chamber 37 is greater than the volume of the air box 42, the piston plate I 38 injects the air in the air chamber 37 into the air box 42 through the through hole 43 and the air passage 41. This air can drive the rack 46 to move upward with sufficient stroke, so that the robotic arm 50 rotates from the fully retracted state to the fully extended horizontal state. The elastic force of the spring III 32 is greater than the tension of the tension spring IV 40 to ensure that the ball 35 has enough force to push the piston plate I 38 to move.

[0036] Reference Figure 3 , Figure 4 , Figure 7 , Figure 8 and Figure 10On the side of the turntable 4 near the robotic arm 50, multiple fixed sleeves 20 arranged in a ring are fixed. A sliding push plate 21 is slidably connected inside the fixed sleeve 20. A tension spring III 22 is fixed between the end of the fixed sleeve 20 near the rotating shaft 3 and the inner wall of the fixed sleeve 20 through a spring seat. The robot body 1 has a guide groove 23 that communicates with the rotating chamber 2. A sliding plate 24 is slidably connected inside the guide groove 23 and is located below the fixed sleeve 20. Multiple bases II 27 are fixed on the inner wall of the guide groove 23 away from the rotating chamber 2. A guide rod III 25 is fixed to the top of each of the multiple bases II 27. The tops of the multiple guide rods III 25 slide into the sliding plate 24. The bottom of the sliding plate 24 is fixed to the top of the base II 27 through a spring seat. There is a spring II 26, which is sleeved on the outer wall of the guide rod III 25. The guide rod III 25 is used to push the sliding plate 24 to move upward and reset. The bottom of the sliding plate 24 is fixed with stationary contact pieces 28 near both ends. Two moving contact pieces 29 located below the stationary contact pieces 28 are fixed in the guide groove 23. The two moving contact pieces 29 cooperate with the corresponding stationary contact pieces 28. An electromagnet 34 is fixed on one side of the inner wall of the fixed cylinder 30. When the stationary contact pieces 28 and the moving contact pieces 29 touch, the electromagnet 34 is energized. A permanent magnet 33 is fixed at one end of the slide rod 31 near the spring III 32. A magnetic attraction force is generated between the permanent magnet 33 and the electromagnet 34. When the electromagnet 34 is energized, it generates a magnetic field, which attracts the permanent magnet 33 and pulls the slide rod 31 into the fixed cylinder 30.

[0037] Specifically, in the initial stage when the incomplete gear 6 and gear I5 drive the turntable 4 to rotate at high speed, the rotational speed of the turntable 4 is relatively high. The centrifugal force on the sliding push plate 21 inside the fixed sleeve 20 is greater than the tension of the tension spring III 22. The sliding push plate 21 moves outward along the radial direction of the fixed sleeve 20, and the tension spring III 22 is in a stretched state. The part of the sliding push plate 21 that extends out of the fixed sleeve 20 will push the sliding plate 24 downward. Under the pushing force of the sliding push plate 21, the sliding plate 24 moves downward as a whole and compresses the spring II 26. In the initial state, the stationary contact piece 28 is located above the moving contact piece 29. When the two are not in contact, the electromagnet 34 is de-energized. When the rotation speed of the turntable 4 reaches a certain value, after the sliding plate 24 moves down a sufficient distance, the stationary contact 28 and the moving contact 29 come into contact, the circuit is connected, and the electromagnet 34 is energized. The magnetic field generated by the electromagnet 34 attracts the permanent magnet 33, overcoming the elastic force of the spring Ⅲ 32, and pulls the sliding rod 31 and the ball 35 at its front end back into the fixed cylinder 30. In this way, during the high-speed rotation of the turntable 4, the ball 35 will not come into contact with the side of the turntable 4, nor will it enter the positioning groove 36, thus avoiding the positioning mechanism from malfunctioning during rotation. Unnecessary resistance and wear are generated. As the rotational speed of turntable 4 gradually decreases due to inertia, the centrifugal force decreases. When the centrifugal force is less than the tension of spring III 22, the sliding push plate 21 retracts back into the fixed sleeve 20 under the tension of spring III 22. The sliding plate 24 loses its downward thrust and moves upward to reset under the elastic force of spring II 26. The stationary contact 28 moves upward with the sliding plate 24 and breaks contact with the moving contact 29. The electromagnet 34 is de-energized. After the magnetic field of the electromagnet 34 disappears, the sliding rod 31 quickly extends towards turntable 4 under the elastic force of spring III 32. At this point, the rotation speed of turntable 4 is already very low, and ball 35 can smoothly slide into the positioning groove 36 directly opposite it. After ball 35 enters the positioning groove 36, it mechanically positions turntable 4 on the one hand, and pushes push rod 39 and piston plate I 38 on the other hand, injecting air from air chamber 37 into air box 42, thus completing the unfolding action of robotic arm 50. This mechanism, which combines mechanical centrifugal force with electromagnetic control, ensures that the positioning action will only occur when turntable 4 is about to stop or is at an extremely low rotation speed, thereby achieving accurate random stopping and triggering of subsequent interactive actions.

[0038] In another embodiment: Refer to Figure 3 , Figure 6 and Figure 11 A tension spring V45 is fixed between the bottom of piston plate II 44 and the bottom inner wall of air box 42 via a spring seat. The tension spring V45 is used to generate a downward pulling force on piston plate II 44. When no air is injected into air box 42, this pulling force ensures that piston plate II 44 is located at the bottom of air box 42 and rack 46 is in the lowest position. At this time, through the transmission of gear II 48 and rotating rod 47, robotic arm 50 is tightened and held in receiving groove 49, preventing robotic arm 50 from accidentally moving out of receiving groove 49 when robot body 1 is transported or subjected to slight vibration.

[0039] A method for using an intelligent interactive teaching robot that triggers prompts based on randomly selected topics includes the following steps: S1. The user first inserts multiple physical card plates 10, each containing questions and answers, into the turntable 4 inside the rotating chamber 2 through the opening at the top of the robot body 1. When each card plate 10 is pushed into its corresponding mounting slot 7, the bottom edge of the card plate 10 contacts the inclined surface of the wedge block I13, forcing the wedge block I13 and the connecting plate 12 fixed thereto to move away from the mounting slot 7 along the guide rod I11. During this process, the connecting plate 12 stretches the tension spring I14 sleeved on the outer wall of the guide rod I11, allowing the tension spring I14 to store elastic potential energy. The card plate 10 continues to move downwards, and its bottom contacts the slide block 8 and compresses the spring I9. When the clamping plate 10 completely passes the end of the inclined surface of the wedge block I13, the top edge of the clamping plate 10 is lower than the bottom surface of the wedge block I13. At this time, the tension spring I14 releases the stored elastic potential energy, pulling the connecting plate 12 and the wedge block I13 to return to the position closer to the mounting groove 7. The bottom surface of the wedge block I13 then presses against the top edge of the clamping plate 10, preventing the clamping plate 10 from coming off upward. At the same time, the compressed spring I9 continues to apply an upward elastic force to the slide block 8. This elastic force keeps the top edge of the clamping plate 10 in close contact with the bottom surface of the wedge block I13, thereby stably fixing the clamping plate 10 in the mounting groove 7. S2. After the user activates the random topic selection function, the motor electrically connected to the controller starts to rotate. The output shaft of the motor drives the incomplete gear 6 to rotate. The toothed part of the incomplete gear 6 engages with the gear I5 fixedly sleeved on the outer wall of the rotating shaft 3. The incomplete gear 6 drives the gear I5, the rotating shaft 3 and the turntable 4 fixed on the rotating shaft 3 to rotate together. The number of teeth of the incomplete gear 6 is designed to be the number of rotations preset. After that, the toothed part of the incomplete gear 6 disengages from the gear I5. After that, the incomplete gear 6 stops rotating, while the gear I5, the rotating shaft 3 and the turntable 4 are no longer driven by the motor. They continue to rotate freely only by their own rotational inertia and the small frictional resistance of the bearings and air in the rotating chamber 2. The specific position of the turntable 4 on its circumference when it finally stops depends on the combined effect of various random resistance factors during the inertial rotation, thereby realizing the randomness of topic selection. S3. In the initial stage of high-speed rotation driven by the incomplete gear 6 and the initial stage of inertial rotation, the angular velocity of the turntable 4 is relatively high. The sliding push plate 21 in the multiple fixed sleeves 20 is subjected to centrifugal force. This centrifugal force overcomes the tension of the tension spring III 22 on the sliding push plate 21, driving the sliding push plate 21 to move radially outward along the fixed sleeve 20. During this process, the tension spring III 22 is stretched and stores elastic potential energy. After the extended end of the sliding push plate 21 extends out of the fixed sleeve 20, its bottom surface contacts and pushes downward the upper surface of the sliding plate 24 located below the fixed sleeve 20. After the sliding plate 24 is subjected to downward thrust, it overcomes the elastic force of the spring II 26 and slides downward along the axial direction of the guide rod III 25. The spring II 26 is compressed and stores elastic potential energy. The sliding plate 24 moves downward a certain distance. Then, the stationary contact piece 28 fixed to the bottom of the sliding plate 24 and the moving contact piece 29 fixed to the inner wall of the guide groove 23 make physical contact to form an electrical path. This path energizes the electromagnet 34, which generates a magnetic field. This magnetic field attracts the permanent magnet 33 fixed to one end of the slide rod 31. This attraction overcomes the elastic force of the spring Ⅲ 32 on the slide rod 31 and pulls the slide rod 31 and the ball 35 set at the end of the slide rod 31 into the interior of the fixed cylinder 30. At this time, the ball 35 is completely retracted into the fixed cylinder 30 and does not contact the surface of the turntable 4 near the mounting groove 7. Therefore, it will not enter the positioning groove 36 on the turntable 4. The turntable 4 can rotate freely in this state without interference from the positioning mechanism, thus avoiding additional energy loss and noise caused by the friction between the ball 35 and the surface of the turntable 4. S4. When the angular velocity of the turntable 4 gradually decreases during inertial rotation, the centrifugal force on the sliding push plate 21 decreases accordingly. When the centrifugal force decreases to less than the tension of the tension spring Ⅲ22 on the sliding push plate 21, the tension spring Ⅲ22 releases its stored elastic potential energy and pulls the sliding push plate 21 back into the fixed sleeve 20. The sliding push plate 21 no longer pushes the sliding plate 24 downward. After the sliding plate 24 loses its downward thrust, the compressed spring Ⅱ26 releases its stored elastic potential energy and pushes the sliding plate 24 to slide upward along the guide rod Ⅲ25 to reset. After the sliding plate 24 moves upward, the stationary contact 28 and the moving contact 29 separate, the electrical circuit is broken, the electromagnet 34 is de-energized, the magnetic field of the electromagnet 34 disappears, and its attraction to the permanent magnet 33 also disappears. At this time, the compressed spring Ⅲ32 releases its stored elastic potential energy and pushes the slide rod 31 and the ball 35 to move towards the turntable 4. S5. When the angular velocity of the turntable 4 further decreases and approaches a stop, the ball 35 meets one of the multiple annularly arranged positioning slots 36 on the turntable 4. Due to the continuous thrust of the spring Ⅲ 32, the ball 35 is embedded in the positioning slot 36. The cooperation between the ball 35 and the positioning slot 36 restricts the continued rotation of the turntable 4, so that the turntable 4 stops precisely at the predetermined position. At this time, the mounting slot 7 corresponding to the position of the positioning slot 36 and the card plate 10 inside it are exactly facing the shooting field of the image acquisition device 54, ensuring that the image acquisition device 54 can clearly capture the question and answer information on the card plate 10. S6. Simultaneously with the ball 35 embedding into the positioning groove 36, the ball 35 pushes the push rod 39, which is pre-set in the positioning groove 36, into the positioning groove 36. The push rod 39 transmits force to the piston plate I 38, which is fixedly connected to it, pushing the piston plate I 38 to move away from the positioning groove 36 in the air chamber 37. The movement of the piston plate I 38 stretches the tension spring IV 40, causing the tension spring IV 40 to store elastic potential energy. When the piston plate I 38 moves in the air chamber 37, it forces the air pre-filled in the air chamber 37 out through the air passage 41. Since the outlet end of the air passage 41 is aligned with the through hole 43 on the air box 42 after the turntable 4 is positioned, the forced air enters the space below the piston plate II 44 inside the air box 42 through the air passage 41 and the through hole 43. The volume of the air chamber 37 is greater than the effective working volume of the air box 42, so the air discharged by the movement of the piston plate I 38... The air volume is sufficient to generate enough air pressure in the air box 42. This air pressure acts on the lower surface of the piston plate II 44, overcoming the tension of the tension spring V 45 on the piston plate II 44 and the weight of the piston plate II 44 itself, pushing the piston plate II 44 to move upward. The piston plate II 44 drives the rack 46 fixed to its top to move upward synchronously. The movement of the rack 46 drives the gear II 48 meshing with it to rotate. The rotation of the gear II 48 drives the rotating rod 47 fixedly connected to it to rotate. The rotation of the rotating rod 47 causes the two robotic arms 50 fixedly sleeved on the outer wall of the rotating rod 47 to rotate around the axis of the rotating rod 47 from inside the receiving groove 49 to the outside of the robot body 1. When the piston plate II 44 moves to the end of its stroke, the robotic arms 50 rotate to a horizontal state. At this time, the button 51 at the bottom of the robotic arm 50 is completely exposed to the outside of the robot body 1 for the user to press and operate. S7. After the image acquisition device 54 acquires the image information on the card plate 10, it transmits the information to the controller. The controller recognizes and processes the image information, extracts the question content, alternative answers and the correct answer. The controller displays the question content and alternative answers on the touch screen 52 and drives the speaker 53 to broadcast the voice. The user can directly select the answer to answer the question by clicking on the touch screen 52 based on the question heard or seen. Alternatively, the user can press the two exposed buttons 51. One button 51 is a prompt button. After the user presses it, the controller displays the pre-stored prompt information on the touch screen 52. The other button 51 is a skip button. After the user presses it, the controller restarts the motor and drives the incomplete gear 6, so that the turntable 4 starts a new round of random rotation and question selection. S8. When the user needs to replace the card plate 10 on the turntable 4, manually move the turntable 4 so that the target card plate 10 is directly below the opening at the top of the robot body 1. Then, the user moves the lever 17 located on one side of the robot body 1 upwards. The lever 17 moves upwards along the guide rod II 16, stretching the tension spring II 18 and storing elastic potential energy. The lever 17 drives the guide rod II 16 and the two wedge blocks II 19 fixed on one side of the guide rod II 16 to move upwards synchronously. The inclined surface of the wedge block II 19 contacts the edge of the connecting plate 12. As the wedge block II 19 continues to move upwards, its inclined surface forces the connecting plate 12 away from the mounting plate. As slot 7 moves, connecting plate 12 drives wedge block I13 to move synchronously, causing the bottom surface of wedge block I13 to detach from the top edge of clamping plate 10. After clamping plate 10 loses the constraint of wedge block I13, the pre-compressed spring I9 releases its elastic force, pushing slide 8 and clamping plate 10 upward. The top of clamping plate 10 pops out from the opening at the top of robot body 1. The user can completely remove clamping plate 10 by pinching it. After the user releases lever 17, tension spring II18 releases its stored elastic potential energy, pulling lever 17, guide rod II16 and wedge block II19 downward back to the initial position, waiting for the next unlocking operation.

[0040] Those skilled in the art should understand that dust may accumulate inside the rotating chamber 2 after prolonged use. Users or maintenance personnel can periodically open the shell of the robot body 1 to clean moving parts such as gear I5, incomplete gear 6, slide bar 31, and sliding plate 24, and apply an appropriate amount of lubricant to the sliding joints to maintain their motion accuracy and sensitivity. Furthermore, although not shown in the accompanying drawings, the installation of a sealing ring at the rotating connection between the robot body 1 and the rotating shaft 3, and the installation of an openable dust cover at the opening of the robot body 1, are both simple dustproof modifications under the concept of this application and should also fall within the protection scope of this invention.

[0041] However, as is well known to those skilled in the art, the working principles and wiring methods of the electromagnet 34, button 51, image acquisition device 54, touch screen 52 and speaker 53 are all conventional means or common knowledge, and will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0042] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0043] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An intelligent interactive teaching robot that triggers prompts based on randomly selected topics, characterized in that: include: The robot body (1) and multiple pallets (10) are provided. The robot body (1) is provided with a rotating chamber (2) and the top of the robot body (1) is provided with an opening that communicates with the rotating chamber (2). The rotating shaft (3) is rotatably connected to the rotating chamber (2); Turntable (4) is fixedly sleeved on the outer wall of the rotating shaft (3). The turntable (4) is provided with multiple sets of mounting mechanisms arranged in a ring around the rotating shaft (3). The mounting mechanism includes a mounting groove (7) for mounting the card plate (10). The mounting groove (7) is located on one side of the turntable (4). A positioning mechanism is used to position the turntable (4), including a plurality of positioning grooves (36) arranged in a ring on the side of the turntable (4) near the mounting groove (7), wherein the positioning grooves (36) correspond to the mounting groove (7). An image acquisition device (54) is fixed to the inner wall of one side of the rotating chamber (2) and is used to capture images of the card plate (10) after the turntable (4) is positioned. Two robotic arms (50) are located on one side of the robot body (1), and buttons (51) are fixed at the bottom of both robotic arms (50). A rotating rod (47) is rotatably connected inside the robot body (1), and both robotic arms (50) are fixedly sleeved on the outer wall of the rotating rod (47); and, A rotating mechanism is used to drive the robotic arm (50) to rotate to a horizontal position when the turntable (4) is positioned.

2. The intelligent interactive teaching robot with random topic selection and prompting as described in claim 1, characterized in that, The rotating mechanism includes an air box (42) fixed to the inner wall of the rotating chamber (2) near the robotic arm (50). The air box (42) is slidably engaged with one side of the turntable (4). A piston plate II (44) is slidably connected inside the air box (42). A rack (46) is fixed to the top of the piston plate II (44). The rack (46) slidably passes through the top inner wall of the air box (42). A gear II (48) that meshes with the rack (46) is fixedly sleeved on the outer wall of the rotating rod (47). The air box (42) has a through hole (43) located below the piston plate II (44) on the side away from the robotic arm (50). The turntable (4) is provided with a drive mechanism, which cooperates with the through hole (43) to inject air into the air box (42) through the through hole (43) to drive the piston plate II (44) to move upward, thereby driving the rack (46) to drive the gear II (48) and the rotating rod (47) to rotate, so that the robotic arm (50) moves out of the receiving groove (49).

3. The intelligent interactive teaching robot with random topic selection and prompting as described in claim 2, characterized in that, The positioning mechanism further includes a fixed cylinder (30) fixed to the inner wall of the rotating chamber (2) away from the robotic arm (50). A slide rod (31) is slidably connected inside the fixed cylinder (30). A spring III (32) is fixed between the end of the slide rod (31) away from the robotic arm (50) and the inner wall of the fixed cylinder (30). A ball (35) is rolled on the end of the slide rod (31) near the robotic arm (50) through a ball socket. The ball (35) corresponds to the positioning groove (36). When the rotation speed of the turntable (4) decreases, the slide rod (31) moves towards the turntable (4) under the elastic force of the spring III (32), so that the ball (35) extends into the positioning groove (36) to position the turntable (4).

4. The intelligent interactive teaching robot with random topic selection and prompting as described in claim 3, characterized in that, The driving mechanism includes a plurality of air chambers (37) arranged in a ring within the turntable (4). The air chambers (37) correspond to the positioning groove (36). A piston plate I (38) is slidably connected to the air chamber (37). A push rod (39) is fixed on the side of the piston plate I (38) near the positioning groove (36). One end of the push rod (39) extends slidably into the positioning groove (36). A tension spring IV (40) is fixed between the piston plate I (38) and the inner wall of the air chamber (37) and sleeved on the outer wall of the push rod (39). The air chamber (37) is provided with an air passage (41) at one end away from the positioning groove (36). The air passage (41) cooperates with the through hole (43). When the ball (35) extends into the positioning groove (36), the air passage (41) and the through hole (43) are aligned. The ball (35) pushes the top rod (39) and the piston plate I (38) to move, and injects the air in the air chamber (37) into the air box (42) through the air passage (41) and the through hole (43) in sequence, so as to drive the robotic arm (50) to rotate.

5. The intelligent interactive teaching robot with random topic selection and prompting as described in claim 4, characterized in that, The mounting mechanism also includes a slide block (8) slidably connected to the mounting groove (7). Multiple springs I (9) are fixed between the slide block (8) and the inner wall of the mounting groove (7). Two inclined wedges I (13) slide through one side of the mounting groove (7). The inclined surfaces of the two inclined wedges I (13) face away from the rotating shaft (3). A guide rod I (11) is fixed to the side of the turntable (4) away from the mounting groove (7). A connecting plate (12) is slidably sleeved on the outer wall of the guide rod I (11). The two inclined wedges I (13) are located away from the mounting groove (7). One end of the groove (7) is fixedly connected to the connecting plate (12). A tension spring I (14) sleeved on the outer wall of the guide rod I (11) is fixed between the connecting plate (12) and the turntable (4). When the card plate (10) is inserted into the mounting groove (7), the card plate (10) pushes the wedge block I (13) to move. After the card plate (10) is completely below the wedge block I (13), the tension spring I (14) drives the wedge block I (13) to reset and abut against the top of the card plate (10) to position the card plate (10).

6. The intelligent interactive teaching robot with random topic selection and prompting as described in claim 5, characterized in that, It also includes an unlocking mechanism, which comprises two bases I (15) arranged vertically on the inner wall of the rotating chamber (2) near the robotic arm (50). A guide rod II (16) is fixed between the two bases I (15). A lever (17) is slidably sleeved on the outer wall of the guide rod II (16). The lever (17) extends to the outside of the robot body (1) through a slide rail set on one side of the robot body (1). The bottom of the lever (17) is fixed to the top of the base I (15) located below. A tension spring II (18) is sleeved on the outer wall of the guide rod II (16). Two inclined wedges II (19) are fixed on the side of the guide rod II (16) away from the lever (17). The inclined surface of the inclined wedges II (19) cooperates with the connecting plate (12). When the lever (17) is moved upward, the inclined surface of the inclined wedges II (19) drives the connecting plate (12) and the inclined wedges I (13) to move, releasing the restriction on the locking plate (10). The locking plate (10) moves out of the opening under the elastic force of the spring I (9).

7. The intelligent interactive teaching robot with random topic selection and prompting as described in claim 6, characterized in that, The turntable (4) has multiple fixed sleeves (20) arranged in a ring on one side near the robotic arm (50). A sliding push plate (21) is slidably connected inside the fixed sleeve (20). A tension spring III (22) is fixed between the sliding push plate (21) and the inner wall of the fixed sleeve (20). The robot body (1) has a guide groove (23) that communicates with the rotating chamber (2). A sliding plate component (24) is slidably connected inside the guide groove (23). 4) Located below the fixed sleeve (20), a spring II (26) is fixed between the bottom of the sliding plate (24) and the inner wall of the guide groove (23). A stationary contact plate (28) is fixed at the bottom of the sliding plate (24). A moving contact plate (29) located below the stationary contact plate (28) is fixed in the guide groove (23). An electromagnet (34) is fixed on the inner wall of the fixed cylinder (30). A permanent magnet is fixed at one end of the slide rod (31) near the spring III (32). The electromagnet (34) is electrically connected to the permanent magnet (33). When the stationary contact piece (28) touches the moving contact piece (29), the electromagnet (34) is energized. When the turntable (4) rotates, the sliding push plate (21) drives the sliding plate (24) to move down under the action of centrifugal force, so that the stationary contact piece (28) contacts the moving contact piece (29). The electromagnet (34) is energized and generates a magnetic attraction force with the permanent magnet (33), which drives the sliding rod (31) to retract. The slide plate (21) retracts into the fixed cylinder (30); after the rotation speed of the turntable (4) decreases, the slide plate (21) resets under the tension of the tension spring III (22), the slide plate (24) moves upward under the elastic force of the spring II (26) to disconnect the stationary contact plate (28) from the moving contact plate (29), the electromagnet (34) is de-energized, and the slide rod (31) extends under the elastic force of the spring III (32) to align the ball (35) with the positioning groove (36).

8. The intelligent interactive teaching robot with random topic selection and prompting as described in claim 7, characterized in that, The rotating chamber (2) is rotatably connected to an incomplete gear (6) on the inner wall away from the robotic arm (50). The robot body (1) is equipped with a motor for driving the incomplete gear (6) to rotate. The outer wall of the rotating shaft (3) is fixedly fitted with a gear I (5). The gear I (5) intermittently meshes with the incomplete gear (6). The incomplete gear (6) drives the gear I (5) and the turntable (4) to rotate, and disengages from the gear I (5) after rotating several times. The gear I (5), the rotating shaft (3) and the turntable (4) continue to rotate under inertia to randomly select the card plate (10).

9. The intelligent interactive teaching robot with random topic selection triggering prompts according to claim 8, characterized in that, The image acquisition device (54) is located on the inner wall of the rotating chamber (2) away from the robotic arm (50). A touch screen (52) and two speakers (53) are fixed on one side of the robot body (1). A controller is provided inside the robot body (1). The controller is electrically connected to the touch screen (52), the speakers (53), the button (51) and the image acquisition device (54). The image acquisition device (54) takes pictures of the questions and answers on the card plate (10) and displays the questions on the touch screen (52). At the same time, the speakers (53) broadcast the questions.

10. The intelligent interactive teaching robot with random topic selection and prompting as described in claim 9, characterized in that, A tension spring V (45) is fixed between the bottom of the piston plate II (44) and the bottom inner wall of the air box (42). The tension spring V (45) is used to apply a downward pulling force to the piston plate II (44) to restrict the robotic arm (50) from moving out of the receiving slot (49) when the robot body (1) is being transported.

Images