Mobile preaching machine and mobile robot

Abstract

The utility model discloses a mobile preaching machine and a mobile robot, the mobile preaching machine comprises a mobile unit, a display unit and a lifting unit, the bottom of the lifting unit is arranged on the mobile unit, the display unit is arranged on the top of the lifting unit, and the display unit is arranged on the top of the lifting unit. The lifting unit adjusts the height position of the display unit relative to the moving unit in the lifting process. When preaching is needed, the lifting unit is used for lifting the position of the display unit relative to the moving unit so as to allow a preaching person to watch the content displayed by the display unit, and when moving is needed, the lifting unit is used for lowering the position of the display unit relative to the moving unit so as to allow the preaching person to watch the content displayed by the display unit. The gravity center of the movable preaching machine is lowered, so that the movable preaching machine is more stable in the moving process and prevented from tilting.

Description

Technical Field

[0001] This utility model relates to a propaganda machine, and more particularly to a mobile propaganda machine and a mobile robot. Background Technology

[0002] With the rapid development of technology, mobile robots are being used more and more widely in various fields. For example, mobile robot technology can be applied to information dissemination devices in public places such as hospitals, shopping malls, exhibitions, museums, airports, and train stations, where they play an important role in delivering information, providing guidance, and displaying content to users. However, existing information dissemination devices have some design limitations, especially in terms of display screen height and center of gravity control. These limitations lead to safety hazards and affect the effectiveness of the devices.

[0003] Specifically, firstly, a fixed-height display screen is difficult to adjust flexibly to different scenarios and the diverse needs of users. For example, in places where many children gather, a screen that is too high will prevent children from clearly seeing the content, while in scenarios where the attention of a distant audience needs to be attracted, a screen that is too low will weaken the effectiveness of information dissemination. This lack of flexibility greatly limits the applicability of the presentation device. Secondly, due to the relatively high position of the display screen, the overall center of gravity of the presentation device is also raised. During movement, if it encounters uneven ground, sharp turns, or accidental collisions, the presentation device is very likely to tip over. This will not only interfere with the normal operation of the presentation device, but may also cause damage to the equipment, or even pose a safety hazard, especially in public places with high traffic, where a tipped presentation device could potentially injure people nearby. Thirdly, the fixed-height design also restricts the presentation device's adaptability in complex environments. For example, in narrow spaces or low-ceilinged environments, a screen that is too high may prevent the device from moving or being used properly. Utility Model Content

[0004] One objective of this invention is to provide a mobile presentation device and a mobile robot, wherein the center of gravity of the mobile presentation device can be adjusted to ensure its safety during movement. For example, by lowering the center of gravity, the autonomous movement of the mobile presentation device can be more stable.

[0005] One objective of this invention is to provide a mobile presentation machine and a mobile robot, wherein the lifting unit of the mobile presentation machine allows the height position of the display unit relative to the moving unit to be adjusted, so as to adjust the center of gravity of the mobile presentation machine.

[0006] According to one aspect of this utility model, a mobile propaganda device is provided, comprising:

[0007] Display unit;

[0008] Moving unit; and

[0009] A lifting unit, wherein the bottom of the lifting unit is disposed on the moving unit, and the display unit is disposed on the top or middle of the lifting unit, wherein the lifting unit adjusts the height position of the display unit relative to the moving unit during the lifting process.

[0010] According to one embodiment of the present invention, the display unit is rotatably mounted on the top or middle of the lifting unit, wherein the extension direction of the axis of rotation of the display unit relative to the lifting unit is perpendicular to the length and width direction of the display unit.

[0011] According to one embodiment of the present invention, the display unit includes a main display and a secondary display, the secondary display being disposed adjacent to the main display and the secondary display being configured to have an adjustable angle relative to the main display, and the main display being mounted on the top or middle of the lifting unit.

[0012] According to one embodiment of the present invention, the mobile unit has a receiving slot, and at least a portion of the display unit can be received in the receiving slot of the mobile unit.

[0013] According to one embodiment of the present invention, from a perspective perpendicular to the axis of rotation when the display unit rotates relative to the lifting unit, the receiving groove of the moving unit is U-shaped.

[0014] According to one embodiment of the present invention, the receiving slot of the mobile unit has a top opening and a side opening, and at least a portion of the display unit is allowed to be received in the receiving slot through the top opening.

[0015] According to one embodiment of the present invention, the distance between the two side openings of the moving unit is greater than or equal to the width of the display unit.

[0016] According to one embodiment of the present invention, the lifting unit includes a base, a drive mechanism, a telescopic mechanism, and a mounting base. The drive mechanism is mounted on the base, the bottom of the telescopic mechanism is mounted on the base, the upper part of the telescopic mechanism is mounted on the drive mechanism, and the mounting base is mounted on the top of the telescopic mechanism. The base of the lifting unit is mounted on the moving unit, and the display unit is mounted on the mounting base. The lifting unit achieves lifting by driving the telescopic mechanism to extend and retract through the drive mechanism.

[0017] According to one embodiment of the present invention, the telescopic mechanism is a telescopic tube, and the driving mechanism is enclosed inside the telescopic tube.

[0018] According to one embodiment of the present invention, the driving mechanism includes a motor, a first screw, and a second screw. The motor is fixedly mounted on the base. The bottom of the first screw is drivably connected to the motor. The bottom of the second screw is screwed onto the top of the first screw. The top of the second screw is configured to remain stationary relative to the upper height of the telescopic mechanism.

[0019] According to one embodiment of the present invention, the mounting base includes a fixed base and a movable base rotatably mounted on the fixed base. The fixed base is fixedly mounted on the top of the telescopic mechanism, and the movable base is fixedly mounted on the display unit.

[0020] According to another aspect of the present invention, the present invention further provides a mobile robot, comprising:

[0021] Display unit;

[0022] Moving unit; and

[0023] A lifting unit, wherein the bottom of the lifting unit is disposed on the moving unit, and the display unit is disposed on the top or middle of the lifting unit, wherein the lifting unit has a retracted state and an extended state, and the lifting unit is capable of switching between the retracted state and the extended state, and the relative height position of the display unit and the moving unit changes with the state of the lifting unit.

[0024] According to one embodiment of the present invention, the mobile unit is an autonomous mobile unit.

[0025] According to one embodiment of the present invention, the mobile unit has a receiving slot, and at least a portion of the display unit can be received in the receiving slot of the mobile unit.

[0026] According to one embodiment of the present invention, the lifting unit includes a base, a drive mechanism, a telescopic mechanism, and a mounting base. The drive mechanism is mounted on the base, the bottom of the telescopic mechanism is mounted on the base, the upper part of the telescopic mechanism is mounted on the drive mechanism, and the mounting base is mounted on the top of the telescopic mechanism. The base of the lifting unit is mounted on the moving unit, the display unit is mounted on the mounting base, and the state of the lifting unit is changed by the drive mechanism driving the telescopic mechanism to extend or retract. Attached Figure Description

[0027] Figure 1 This is a three-dimensional schematic diagram of a mobile lectern in lecturing mode according to a preferred embodiment of the present invention.

[0028] Figure 2 This is a perspective view of the mobile lectern in lecturing mode according to the above-described preferred embodiment of the present utility model.

[0029] Figure 3 This is a three-dimensional schematic diagram of one of the processes by which the mobile preaching machine switches from preaching state to mobile state according to the above-described preferred embodiment of the present utility model.

[0030] Figure 4 This is a three-dimensional schematic diagram of the second process of the mobile preaching machine switching from preaching state to mobile state according to the above-mentioned preferred embodiment of the present utility model.

[0031] Figure 5 This is a perspective view of the mobile propaganda machine in a mobile state according to the above-described preferred embodiment of the present invention.

[0032] Figure 6 This is a cross-sectional schematic diagram of a lifting unit of the mobile propaganda machine according to the above-described preferred embodiment of the present invention.

[0033] Figure 7 yes Figure 6 An enlarged diagram of one of the locations.

[0034] Figure 8 yes Figure 6 An enlarged view of another location.

[0035] Figure 9 This is a perspective view of a modified example of the mobile propaganda machine according to the above-described preferred embodiment of the present utility model. Detailed Implementation

[0036] Before describing any embodiment of this invention in detail, it should be understood that the invention is not limited in its application to the details of the construction and arrangement of the components set forth in the following description or illustrated in the following figures. The invention is capable of other embodiments and can be practiced or carried out in various ways. Furthermore, it should be understood that the wording and terminology used herein are for descriptive purposes and should not be considered limiting. The use of “comprising” or “having” and variations thereof herein is intended to cover the items set forth below and their equivalents, as well as any additional items. Unless otherwise specified or limited, the terms “installation,” “connection,” “support,” and “linkage,” and variations thereof are used broadly and cover both direct and indirect installation, connection, support, and linking. Moreover, “connection” and “linkage” are not limited to physical or mechanical connections or links.

[0037] Furthermore, firstly, in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as a limitation on this utility model. Secondly, the term "a" should be understood as "at least one" or "one or more," that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. The term "a" should not be construed as a limitation on the quantity.

[0038] Refer to the accompanying drawings of the specification of this utility model. Figures 1 to 8 A preferred embodiment of the present invention will be disclosed and described below, wherein the mobile robot includes a moving unit 10, a display unit 20, and a lifting unit 30. The bottom of the lifting unit 30 is disposed on the moving unit 10, and the display unit 20 is disposed on the top of the lifting unit 30, with the lifting unit 30 supporting the display unit 20 to a suitable height. Optionally, in other examples of the mobile robot of the present invention, the display unit 20 may also be disposed in the middle of the lifting unit 30.

[0039] In the mobile robot of this invention, the lifting unit 30 has a retracted state and an extended state, and the lifting unit 30 can switch between the retracted state and the extended state. When the lifting unit 30 is in the retracted state, the height of the display unit 20 relative to the moving unit 10 is lowered to reduce the center of gravity of the mobile robot. This allows the mobile robot to move smoothly and significantly reduces the risk of it tipping over during movement. When the lifting unit 30 is in the extended state, the display unit 20 can be used to display content. For example, in this specific example where the mobile robot is implemented as a mobile presentation device, the display unit 20 can be used to display presentation content. It is understood that when the lifting unit 30 is in the extended state, the lifting unit 30 can support the display unit 20 to different height positions as needed to meet the usage needs of different scenarios.

[0040] In other words, in the mobile robot of this utility model, the lifting unit 30 can adjust the height position of the display unit 20 relative to the moving unit 10 during the lifting process. That is, the relative height position of the display unit 20 and the moving unit 10 changes with the state of the lifting unit 30.

[0041] It is worth noting that the specific type of the mobile unit 10 is not limited in the mobile robot of this utility model. In one specific example of the mobile robot of this utility model, the mobile unit 10 can be an autonomous mobile robot, that is, the mobile unit 10 does not require human assistance and can understand the environment and navigate to achieve autonomous movement. In another specific example of the mobile robot of this utility model, the mobile unit 10 requires human assistance to propel its movement.

[0042] Furthermore, the specific type of the display unit 20 is not limited in the mobile robot of this utility model. For example, in one specific example of the mobile robot of this utility model, the display unit 20 may only have display capabilities, while in another specific example of the mobile robot of this utility model, the display unit 20 may have data processing capabilities in addition to display capabilities.

[0043] Preferably, in a specific example of the mobile robot of the present invention, the mobile unit 10 has a battery, and the display unit 20 is electrically connected to the battery of the mobile unit 10, such that the display unit 20 draws power from the battery of the mobile unit 10.

[0044] Reference Appendix Figures 1 to 5 The display unit 20 is rotatably mounted on top of the lifting unit 30, and the rotation axis of the display unit 20 and the lifting unit 30 (i.e., the axis of rotation of the display unit 20 relative to the lifting unit 30) is perpendicular to the length and width direction of the display unit 20. Thus, the display unit 20 can have both landscape and portrait modes. In other words, by rotating the display unit 20, it can switch between landscape and portrait modes. When the display unit 20 is in landscape mode, its horizontal dimension is larger than its vertical dimension; when the display unit 20 is in portrait mode, its horizontal dimension is smaller than its vertical dimension.

[0045] Reference Appendix Figures 2 to 5The moving unit 10 has a receiving slot 11. When the lifting unit 30 is in the retracted state, at least a portion of the display unit 20 is received in the receiving slot 11 of the moving unit 10. Thus, the moving unit 10 and the display unit 20 have an overlapping portion in the horizontal direction, which helps to further lower the center of gravity of the mobile robot. Specifically, in a specific example of the mobile robot of this utility model, the bottom of the lifting unit 30 is disposed in the receiving slot 11 of the moving unit 10. Thus, when the lifting unit 30 switches from the extended state to the retracted state, at least a portion of the display unit 20 can sink into the receiving slot 11 of the moving unit 10, so that this portion of the display unit 20 is located in the receiving slot 11 of the moving unit 10.

[0046] Preferably, from a perspective perpendicular to the axis of rotation of the display unit 20 relative to the lifting unit 30, the receiving slot 11 of the moving unit 10 is U-shaped, that is, the receiving slot 11 of the moving unit 10 has a top opening 111, and at least a portion of the display unit 20 can be received in the receiving slot 11 through the top opening 111 of the receiving slot 11 of the moving unit 10.

[0047] More preferably, the receiving slot 11 of the moving unit 10 may further have side openings 112 on both sides. In this way, even when the display unit 20 is in landscape mode and the length of the display unit 20 is greater than the distance between the two side openings 112 of the moving unit 10, the height of the display unit 20 can still be lowered as the state of the lifting unit 30 is switched. In this process, the edge of the display unit 20 is prevented from being blocked or collided with by the moving unit 10.

[0048] Nevertheless, before the lifting unit 30 switches from the extended state to the retracted state, it is preferable to rotate the display unit 20 to switch it from landscape mode to portrait mode. This way, after the lifting unit 30 switches to the retracted state, allowing at least a portion of the display unit 20 to be housed in the receiving slot 11 of the moving unit 10, the portion of the display unit 20 exposed through the side opening 112 of the moving unit 10 can be reduced, or even prevented from being exposed through the side opening 112 at all. This helps protect the display unit 20 during the movement of the mobile robot. For example, in the attached... Figures 1 to 8 In this specific example of the mobile robot of the present invention shown, the distance between the two side openings 112 of the mobile unit 10 is greater than or equal to the width of the display unit 20.

[0049] Appendix Figures 6 to 8 A specific embodiment of the lifting unit 30 is shown, wherein the lifting unit 30 includes a base 31, a drive mechanism 32, a telescopic mechanism 33, and a mounting base 34. The bottoms of the drive mechanism 32 and the telescopic mechanism 33 are respectively mounted on the base 31, the upper part of the telescopic mechanism 33 is mounted on the drive mechanism 32, and the mounting base 34 is mounted on the top of the telescopic mechanism 33. The base 31 is mounted on the moving unit 10, for example, the base 31 can be locked to the moving unit 10 by screws, and the mounting base 34 is mounted on the display unit 20, for example, the mounting base 34 can be locked to the display unit 20 by screws. In this way, the lifting unit 30 can support the display unit 20 to a suitable position above the moving unit 10.

[0050] The drive mechanism 32 drives the telescopic mechanism 33 to extend and retract, allowing the lifting unit 30 to switch between a retracted state and an extended state. When the drive mechanism 32 drives the telescopic mechanism 33 to retract, the lifting unit 30 is in the retracted state, and at least a portion of the display unit 20 is housed in the receiving slot 11 of the moving unit 10. When the drive mechanism 32 drives the telescopic mechanism 33 to extend, the lifting unit 30 is in the extended state, and the display unit 20 can display content. For example, when the mobile robot is implemented as a mobile lecturing machine, the display unit 20 can display lecturing content. It is understood that the drive mechanism 32 can drive the telescopic mechanism 33 to extend to different heights, allowing the display unit 20 to be supported at different heights to meet the needs of different scenarios.

[0051] In other words, in the mobile robot of this utility model, the lifting unit 30 achieves lifting by driving the telescopic mechanism 33 to extend and retract through the drive mechanism 32, so that the lifting unit 30 can switch between the retracted state and the extended state.

[0052] Preferably, in this specific example of the mobile robot of the present invention, the telescopic mechanism 33 is a telescopic tube that covers the outside of the drive mechanism 32, making the drive mechanism 32 visually invisible, which helps to ensure the aesthetics and reliability of the mobile robot.

[0053] Further, the drive mechanism 32 includes a motor 321, a first screw 322, and a second screw 323. The motor 321 is mounted on the base 31, for example, by screws. The bottom of the first screw 322 is drivably connected to the motor 321, and the bottom of the second screw 323 is screwed onto the top of the first screw 322. The top of the second screw 323 is configured to remain stationary relative to the upper height of the telescopic mechanism 33. When the motor 321 drives the first screw 322 to rotate in one direction, the first screw 322 and the second screw 323 cooperate, allowing the second screw 323 to move upwards. Since the top of the second screw 323 is configured to remain stationary relative to the upper height of the telescopic mechanism 33, the second screw 323 causes the telescopic mechanism 33 to extend, thus placing the lifting unit 30 in the extended state. When the motor 321 drives the first screw 322 to rotate in the opposite direction, the first screw 322 and the second screw 323 cooperate with each other, allowing the second screw 323 to move downward. Since the top of the second screw 323 is configured to remain stationary relative to the upper part of the telescopic mechanism 33, the second screw 323 drives the telescopic mechanism 33 to retract, thereby allowing the lifting unit 30 to switch to the retracted state.

[0054] In this specific example of the mobile robot of this utility model, the telescopic mechanism 33 includes a top telescopic tube 331, a middle telescopic tube 332, and a bottom telescopic tube 333. The top of the middle telescopic tube 332 is fitted onto the bottom of the top telescopic tube 331, and at least a portion of the top telescopic tube 331 can retract into and extend out of the middle telescopic tube 332. The top of the bottom telescopic tube 333 is fitted onto the bottom of the middle telescopic tube 332, and at least a portion of the middle telescopic tube 332 can retract into and extend out of the bottom telescopic tube 333. The bottom of the bottom telescopic tube 333 is mounted on the base 31 and covers the drive mechanism 32. For example, the bottom of the bottom telescopic tube 333 can be mounted on the base 31 with screws, and the top of the second screw 323 can be mounted on the bottom of the top telescopic tube 331 with a bearing, so that the top of the second screw 323 is configured to remain stationary relative to the upper part of the telescopic mechanism 33. When the motor 321 drives the first screw 322 to rotate in one direction, allowing the second screw 323 to move upward, the top telescopic tube 331 extends out of the middle telescopic tube 332 and the middle telescopic tube 332 extends out of the bottom telescopic tube 333. In this way, the second screw 323 drives the telescopic mechanism 33 to extend, so that the lifting unit 30 is in the extended state. When the motor 321 drives the first screw 322 to rotate in one direction, allowing the second screw 323 to move downward, at least a portion of the top telescopic tube 331 retracts into the middle telescopic tube 332, and at least a portion of the bottom telescopic tube 333 retracts into the bottom telescopic tube 333, so that the lifting unit 30 can switch to the retracted state.

[0055] Optionally, in some other examples of the mobile robot of this utility model, the telescopic mechanism 33 may only include the top telescopic tube 331 and the bottom telescopic tube 333. Optionally, in some other examples of the mobile robot of this utility model, the telescopic mechanism 33 may include a greater number of the middle telescopic tubes 332 in addition to the top telescopic tube 331 and the bottom telescopic tube 333.

[0056] Reference Appendix Figure 6The mounting base 34 includes a fixed base 341 and a movable base 342 rotatably mounted on the fixed base 341. The fixed base 341 is fixedly mounted on the top of the telescopic mechanism 33, that is, the fixed base 341 and the top of the top telescopic tube 331 of the telescopic mechanism 33 are fixedly mounted. The movable base 342 is fixedly mounted on the display unit 20. In this way, the display unit 20 is rotatably mounted on the top of the telescopic mechanism 33, so that the display unit 20 can switch between landscape mode and portrait mode. Preferably, the mounting base 34 includes a drive motor 343, the main body of which is mounted on the fixed base 341. The movable base 342 is drivably connected to the rotor of the drive motor 343. When the drive motor 343 is powered and its rotor rotates, the drive motor 343 drives the movable base 342 and the display unit 20 to rotate, enabling the display unit 20 to switch between landscape and portrait modes.

[0057] Appendix Figures 1 to 5 A specific example of the mobile robot being implemented as the mobile information dissemination device is shown. The mobile information dissemination device can be applied in scenarios such as hospitals to disseminate relevant content to medical staff, patients, and / or their families.

[0058] Figure 1 and Figure 2 A perspective view of the mobile presentation device in presentation mode is shown, wherein the lifting unit 30 is in the extended state and the display unit 20 is in landscape mode. It can be understood that when the mobile presentation device is in presentation mode, the display unit 20 can also be in portrait mode; by rotating the display unit 20, it can switch between landscape and portrait modes.

[0059] Figure 5 A perspective view of the mobile propaganda machine in motion is shown, wherein the lifting unit 30 is in the retracted state, at which time the center of gravity of the mobile propaganda machine is lower, which makes the movement of the mobile propaganda machine smooth and avoids tipping over.

[0060] Appendix Figure 3 and Figure 4The process of switching the mobile presentation device from presentation mode to mobile mode is illustrated. Specifically, the process of switching the mobile presentation device from presentation mode to mobile mode includes: first, rotating the display unit 20 to a portrait mode to reduce the size of the display unit 20 in the horizontal direction; second, allowing the lifting unit 30 to switch from the extended state to the retracted state. During the switch from the extended state to the retracted state, the lifting unit 30 drives the display unit 20 to descend, so that at least a portion of the display unit 20 sinks through the top opening 111 of the mobile unit 10 into the receiving slot 11 of the mobile unit 10. At this time, the mobile presentation device is in the mobile state.

[0061] Appendix Figure 9 A modified example of the mobile propaganda device of this utility model is shown, with reference to the appendix. Figures 1 to 8 Unlike the mobile preaching device shown, the attached device has... Figure 9 In this specific example of the mobile presentation device shown, the display unit 20 includes a main display 21 and at least one secondary display 22. The main display 21 is mounted on the top or middle of the lifting unit 30, and the secondary display 22 is disposed adjacent to the main display 21. The secondary display 22 is configured to be angle-adjustable relative to the main display 21, thus allowing the display unit 20 to be folded and unfolded. When the display unit 20 is folded, its overall size decreases; when it is unfolded, its display area increases. In a specific example of this invention, the adjacent sides of the main display 21 and the secondary display 22 are connected by a hinge, allowing the secondary display 22 to be angle-adjustable relative to the main display 21.

[0062] In the appendix Figure 9 In this specific example of the mobile presentation device shown, the display unit 20 has two sub-displays 22. One sub-display 22 is provided on each side of the main display 21. In this way, after the display unit 20 is unfolded, not only can the display area of ​​the display unit 20 be increased, but the center of gravity of the display unit 20 is also ensured to be located at the position of the lifting unit 30, which helps to ensure the stability of the mobile presentation device.

[0063] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. A mobile propaganda device, characterized in that, include: Display unit; Mobile unit; as well as A lifting unit, wherein the bottom of the lifting unit is disposed on the moving unit, and the display unit is disposed on the top or middle of the lifting unit, wherein the lifting unit adjusts the height position of the display unit relative to the moving unit during the lifting process.

2. The mobile lecture machine according to claim 1, wherein the display unit is rotatably mounted on the top or middle of the lifting unit.

3. The mobile lectern according to claim 1, wherein the display unit includes a main display and a secondary display, the secondary display being disposed adjacent to the main display and the secondary display being configured to be angle-adjustable relative to the main display, and the main display being mounted on the top or middle of the lifting unit.

4. The mobile presentation device according to claim 2, wherein the mobile unit has a receiving slot, and at least a portion of the display unit can be received in the receiving slot of the mobile unit.

5. The mobile lecture machine according to claim 4, wherein, viewed from a perspective perpendicular to the axis of rotation of the display unit relative to the lifting unit, the receiving slot of the mobile unit is U-shaped.

6. The mobile presentation device according to claim 4, wherein the receiving slot of the mobile unit has a top opening and a side opening, and at least a portion of the display unit is allowed to be received in the receiving slot through the top opening.

7. The mobile presentation device according to claim 6, wherein the distance between the two side openings of the mobile unit is greater than or equal to the width of the display unit.

8. The mobile lecture machine according to any one of claims 1 to 7, wherein the lifting unit includes a base, a drive mechanism, a telescopic mechanism, and a mounting base, wherein the drive mechanism is mounted on the base, the bottom of the telescopic mechanism is mounted on the base, the upper part of the telescopic mechanism is mounted on the drive mechanism, and the mounting base is mounted on the top of the telescopic mechanism, wherein the base of the lifting unit is mounted on the mobile unit, the display unit is mounted on the mounting base, and the lifting unit achieves lifting by driving the telescopic mechanism to extend and retract via the drive mechanism.

9. The mobile propaganda machine according to claim 8, wherein the telescopic mechanism is a telescopic tube, and the drive mechanism is enclosed inside the telescopic tube.

10. The mobile lecture machine according to claim 8, wherein the driving mechanism includes a motor, a first screw and a second screw, the motor is fixedly mounted on the base, the bottom of the first screw is drivably connected to the motor, the bottom of the second screw is screwed onto the top of the first screw, and the top of the second screw is configured to remain stationary at a height relative to the upper part of the telescopic mechanism.

11. The mobile lecture machine according to claim 8, wherein the mounting base includes a fixed base and a movable base rotatably mounted on the fixed base, the fixed base being fixedly mounted on the top of the telescopic mechanism, and the movable base being fixedly mounted on the display unit.

12. A mobile robot, characterized in that, include: Display unit; Mobile unit; as well as A lifting unit, wherein the bottom of the lifting unit is disposed on the moving unit, and the display unit is disposed on the top or middle of the lifting unit, wherein the lifting unit has a retracted state and an extended state, and the lifting unit is capable of switching between the retracted state and the extended state, and the relative height position of the display unit and the moving unit changes with the state of the lifting unit.

13. The mobile robot according to claim 12, wherein the mobile unit is an autonomous mobile unit.

14. The mobile robot of claim 12 or 13, wherein the mobile unit has a receiving slot, and at least a portion of the display unit can be received in the receiving slot of the mobile unit.

15. The mobile robot according to claim 14, wherein the lifting unit includes a base, a drive mechanism, a telescopic mechanism, and a mounting base, the drive mechanism is mounted on the base, the bottom of the telescopic mechanism is mounted on the base, the upper part of the telescopic mechanism is mounted on the drive mechanism, and the mounting base is mounted on the top of the telescopic mechanism, wherein the base of the lifting unit is mounted on the mobile unit, the display unit is mounted on the mounting base, and the state of the lifting unit is changed by the drive mechanism driving the telescopic mechanism to extend or retract.

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