Display device for propaganda

Abstract

The propaganda display device belongs to the technical field of propaganda display, not only can passively display propaganda materials, but also can display learning conditions through the status bar arranged on the edge of the propaganda column, so that the learning conditions displayed in the status bar can be obtained, learning objects can select learning time and content, and the learning efficiency is improved. The display rack can send a learning site to the display rack, after receiving learning related information, the display rack can send a propaganda unmanned aerial vehicle to convey related learning materials and a projector with propaganda content in place for learning, and after learning is completed, the display rack can report the learning situation back to the display rack; and then the corresponding learning condition is updated through the status bar, so that the functions of supervising and conveying learning materials are added.

Description

Technical Field

[0001] The invention relates to the technical field of publicity and display, and in particular to a display device for publicity. Background Art

[0002] In publicity, what is usually used are publicity columns, publicity display boards, etc. When displaying, the materials to be promoted are placed on the publicity columns or display boards, or the publicity materials are displayed on the publicity columns. The existing publicity is only a passive display process, which cannot trace whether the displayed content has been learned, and it cannot grasp the learning degree of the displayed content. The existing publicity display devices are only passive publicity, and cannot guarantee whether the publicity content has been learned, and the learning effect is not good. In the prior art, patent document 1 (CN115222220A) discloses an organizational life management platform, which is equipped with an organizational life management terminal, a mobile terminal, etc., which can supervise and evaluate learning conditions, learning effects, etc., and can also be convenient for everyone to use. However, the management platform is operated through a mobile phone or computer, etc., and cannot have an external display object like the existing propaganda column; in this regard, in the prior art, patent document 2 (CN219046230U) discloses a propaganda column that is easy to move, which is equipped with a propaganda column board under the drone structure. The propaganda column is moved by the drone, which can facilitate the movement of the propaganda column and improve the propaganda effect of the propaganda column. However, it is only used to move the propaganda column, and it cannot track the propaganda effect; in the prior art, for the stable hovering of the drone in the air, patent document 3 (CN116215900A) discloses a double-airbag unmanned aerial vehicle, which includes The drone includes two airbags, on which rotors are arranged. By filling the airbags with helium, the airbags can be used for floating, and then the movement of the aircraft can be realized by coordinating the movement of the rotors. A connecting arm is also arranged between the two airbags, and a camera is arranged on the connecting arm, so that the suspended shooting of the drone can be well realized. Although the setting of the two airbags can well provide the suspension ability of the aircraft, it also affects the running speed of the drone. Since the airbags are often affected by strong winds at high altitudes, if there are strong winds at high altitudes, the aircraft will not be able to operate at high altitudes. Moreover, due to the existence of the airbags, the wind resistance encountered by the drone when it is running in the air becomes very large, which greatly increases the running time of the drone. Compared with the existing drones, its running time is often longer. Moreover, since the aircraft includes two airbags during operation, it is easily affected by wind force during operation. When it is windy, the flight path of the aircraft may change, and its flight becomes uncontrollable.

[0003] In summary, the existing display devices for promotion either carry out promotion passively or only set up a management platform at the client level. There is no display device that can not only carry out physical promotional displays, but also actively deliver learning materials to learners according to learning needs, and can provide real-time feedback on learning effects. For this reason, the present invention provides a display device for promotion that can deliver promotional materials through drones, can deliver promotional content to learners while promoting, can enable multiple parties to learn at the same time, and can track learning effects. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a display device for publicity, which comprises: a display stand, a publicity column, a status bar and a book and material placement area, wherein the publicity column and the status bar are arranged at the upper end of the display stand, and the book and material placement area is arranged at the lower end of the display stand, and a plurality of charging ports are also arranged at the top of the display stand, and the plurality of charging ports are used to connect with a publicity drone, and the publicity drone is parked at the top of the display stand, and the publicity column displays publicity content, and the status bar is used to display the learning status of the content of the publicity column, and if there is a situation of non-learning, the status bar generates a reminder message for timely follow-up learning The reminder information is transmitted to the learning object, and the learning object registers the learning time, learning content and learning address information. After receiving the registration information, the display stand sends the registration information to the publicity drone, and the publicity drone flies from the top of the publicity column to the book and material placement area. The book push-and-place component at the rear end of the book placement area moves to push the corresponding book and material into the placement cavity of the publicity drone, and then places the projector into the placement cavity. After being transported to the designated location by the publicity drone, the book and material and the projector are taken out for learning. After the learning is completed, the publicity drone sends the learning completion status to the publicity column, and the publicity column displays the updated learning status.

[0005] Preferably, the promotional drone includes a spherical outer frame assembly and a rotor assembly, the rotor assembly is arranged at the upper end of the spherical outer frame assembly, the spherical outer frame assembly includes a spherical outer frame and a lower magnetic seat, the spherical outer frame includes a top horizontal circle, a middle horizontal circle, a ball placement plate and a plurality of vertical support rods, the top horizontal circle, the middle horizontal circle and the ball placement plate are arranged horizontally from top to bottom, and are connected and supported by the plurality of vertical support rods, an air bag and an air supply assembly are arranged at the upper end of the ball placement plate, when the placement cavity is used as a carrying space to load a projector and books and materials, the air bag is in an airless contracted state, the projector and books and materials are placed at the ball placement plate, the placement cavity is formed inside the spherical outer frame, after the projector and books and materials are loaded, the rotor assembly is actuated, according to Arrive at the designated location according to the registered time and location, take out the projector and books and materials, install the projector at the lower end of the lower magnetic seat, and at the same time, fill the airbag with hydrogen or helium, the airbag begins to expand, and after expanding to a certain extent, stop inflating, the promotional drone is provided with buoyancy by the gas in the airbag and is in a suspended state, stop the movement of the rotor assembly, connect the cable between the projector and the charging plug, the projector starts to work, after the study is completed, the rotor assembly moves, and the air in the airbag is discharged at the same time, the airbag gradually shrinks, and then the projector and cable are removed, the relevant books and materials are retrieved, and placed back in the placement cavity, the promotional drone flies back to the display stand, and after putting the books and materials and the projector back to their original places, the promotional drone returns to the charging port for charging.

[0006] Preferably, the promotional drone also includes a wind direction adjustment component, which is rotatably arranged in the top horizontal circle, and the wind direction adjustment component includes: a rotating circular frame, an upper winding cloth roller, a flexible cloth, a drooping rod group, a left winding cable and a right winding cable. The rotating circular frame is rotatably arranged on the inner side of the top horizontal circle, the flexible cloth is wound on the upper winding cloth roller, and the lower end of the flexible cloth is fixedly arranged in the middle of the drooping rod group, the left winding cable and the right winding cable are both arranged at the lower end of the rotating circular frame, and the ends of the left winding cable and the right winding cable are respectively connected to the two sides of the drooping rod group, and the length of the flexible cloth extended can be controlled by controlling the extension and shortening of the left winding cable and the right winding cable.

[0007] Preferably, a return torsion spring is arranged between the upper cloth winding roller and the top horizontal circle, the left and right winding cable members have the same structure and both include a winding drum and a cable member, the cable member is wound on the winding drum, the end of the cable member is connected to the drooping rod group, the gravity of the drooping rod group can straighten the flexible cloth, and when it is necessary to unfold the flexible cloth, the left and right winding cable members are driven to stretch, and the flexible cloth is pulled out by the gravity of the drooping rod group, and the return torsion spring is also twisted to store the restoring force. After being pulled out into place, the left and right winding cable members stop moving, and when it is necessary to retract the flexible cloth, the left and right winding cable members are driven to retract, and the return torsion spring releases the stored restoring force, driving the flexible cloth to retract.

[0008] Preferably, the drooping rod group includes a main rod and a left telescopic rod and a right telescopic rod telescopically arranged at both ends of the main rod, the left telescopic rod and the right telescopic rod can be actively telescoped, the left telescopic rod and the right telescopic rod extend when the flexible cloth is stretched, and can be inserted into the lower end of the middle horizontal circle to fix the flexible cloth, a rotating driving power source is arranged between the top horizontal circle and the rotating circular frame, and a wind sensor is also arranged at the spherical outer frame, which can detect the size and direction of the wind, and when it is detected that the wind direction is the same as the forward direction of the promotional drone, the flexible cloth is extended, and the left telescopic rod and the right telescopic rod are inserted into the lower end of the middle horizontal circle. When the promotional drone needs to turn, the rotating circular frame can be driven to rotate relative to the top horizontal circle, so that the flexible cloth forms a spiral structure, so that the wind can be used to form a turning force.

[0009] Preferably, the rotating circular frame includes a rotating ring body and a sliding hinge seat 1 and a sliding hinge seat 2 arranged at the lower end of the rotating ring body, the lower end of the rotating ring body is provided with a accommodating cavity 1 and a accommodating cavity 2, the sliding hinge seat 1 is slidably arranged in the accommodating cavity 1, and the sliding hinge seat 2 is slidably arranged in the accommodating cavity 2, the sliding hinge seat 1 and the sliding hinge seat 2 have the same structure, both including a bottom plate 1 and a first support ear and a second support ear arranged on the bottom plate 1, the first support ear and the second support ear are both provided with hinge holes, the sliding hinge seat 1 and the sliding hinge seat 2 are respectively slidably arranged in the accommodating cavity 1 and the accommodating cavity 2, a first elastic member is provided between the sliding hinge seat 1 and the accommodating cavity 1, a second elastic member is provided between the sliding hinge seat 2 and the accommodating cavity 2, a roller supporting hole 1 and a roller supporting hole 2 are respectively provided on the inner side of the rotating ring body, two ends of the upper cloth winding roller are respectively rotatably arranged in the roller supporting hole 1 and the roller supporting hole 2, and the winding drum is rotatably arranged in the hinge hole.

[0010] Preferably, the display rack is provided with a base, a side supporting wall and an upper display frame in sequence from bottom to top, the base and the side supporting walls form the book and material placement area, the book pushing and placing assembly is arranged on the side supporting walls, and includes a plurality of pushing cylinders and a plurality of book pushing boards, the number of the pushing cylinders and the number of the book pushing boards are the same, the book pushing boards are arranged closely side by side, and the extension and retraction of the book pushing boards are driven by the extension and retraction of the pushing cylinders, thereby enabling the selection of books and materials.

[0011] Preferably, an opening and closing door is provided on one side of the spherical outer frame.

[0012] Preferably, two promotional drones are connected through a connecting assembly, which includes a connecting rod 1, a connecting rod 2, an adjustable plate group connecting the connecting rod 1 and the connecting rod 2, and a pushing rotor arranged on the adjustable plate group. One end of the connecting rod 1 is connected to a promotional drone, and the other end is connected to the adjustable plate group; one end of the connecting rod 2 is connected to another promotional drone, and the other end is connected to the adjustable plate group. The adjustable plate group is rotatably connected to the connecting rod 1, and the adjustable plate group is also rotatably connected to the connecting rod 2. The inclination angle relative to the two promotional drones can be adjusted through the adjustable plate group. The connecting rod 1 and the connecting rod 2 are respectively connected to both sides of the adjustable plate group. The pushing rotor is arranged on the rear side of the adjustable plate group. The projector is installed on the upper end of the adjustable plate group when projecting.

[0013] Preferably, the promotional drone also includes a wind direction adjustment component, which is rotatably arranged in the top horizontal circle. The wind direction adjustment component includes a rotating circular frame, an upper cloth winding roller, a flexible cloth, a drooping rod group, a retracting rope 1 and a retracting rope 2. The rotating circular frame is rotatably arranged on the inner side of the top horizontal circle. The flexible cloth is wound on the upper cloth winding roller, and the lower end of the flexible cloth is fixedly arranged in the middle of the drooping rod group. The retracting rope 1 is arranged at one end of the drooping rod group and the lower end of the spherical outer frame. The retracting rope 2 is arranged at the other end of the drooping rod group and the lower end of the spherical outer frame. When the flexible cloth needs to be pulled out, the retracting rope 1 and the retracting rope 2 are retracted, and the upper cloth winding roller is in an unwinding state.

[0014] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0015] 1. The publicity display device of the present invention, in addition to being able to display publicity materials passively, is also provided with a status bar next to the publicity column, through which the learning situation can be displayed, and the learning situation displayed in the status bar can be obtained. The learner can select the learning time and content, and can send the learning location to the display stand. After the display stand receives the learning-related information, it can dispatch a publicity drone to deliver the relevant learning materials and a projector with publicity content for learning, and after the learning is completed, the learning situation can be reported back to the display stand, and then the corresponding learning situation can be updated through the status bar. In this way, compared with the existing display device of rotating materials that only has passive publicity, it can increase the functions of supervision and delivery of learning materials;

[0016] 2. In order to cooperate with the publicity, the outer shell of the publicity drone of the present invention is set as a hollow spherical outer frame structure with a placement cavity. In addition to being able to serve as a loading space, it also takes into account that the use of such a frame structure will be less affected by airflow when flying at high altitudes. Moreover, in order to enable the drone to be in a hovering state when performing projection operations, an airbag structure is also set at the lower part of the spherical outer frame structure. The airbag structure is in a retracted state when the drone is in a flying or transporting state. The retracted state is set at the bottom of the spherical outer frame structure. When the drone arrives and the internal loaded goods are unloaded, when it needs to hover for projection operations, the airbag structure is filled with hydrogen or helium, so that the drone can be in a hovering state by using the airbag and the rotor assembly can also be in a stopped state at this time, which can better save energy.

[0017] 3. The propaganda UAV of the present invention takes into account that it is more likely to encounter strong winds when flying in the air. If the wind can be used, the flight speed and efficiency of the UAV will be improved. Therefore, a wind direction adjustment component is also provided on the UAV. The wind direction adjustment component uses a retractable flexible cloth. The function of the flexible cloth is equivalent to the sail used on a ship. The upper and lower ends of the flexible cloth can be in a fixed state when the wind blows. Therefore, when the direction of the strong wind is the same as the direction of the UAV, the flexible cloth can be used to make the UAV fly faster.

[0018] 4. In addition, in order to utilize wind force to rotate the drone when it rotates, the upper end of the wind direction adjustment component is rotatable relative to the spherical outer frame, while the lower end of the wind direction adjustment component is in a relatively fixed state. In this way, the upper end of the wind direction adjustment component can be rotated to make the flexible cloth as a whole present a spiral cloth. The spiral cloth can guide the wind direction from one direction to another wind direction that is clamped to the one direction to a certain extent, thereby quickly helping the drone to make a corresponding turn or even a U-turn;

[0019] 5. Finally, the applicant's drone can also be set up as two, and the two drones can be connected by a connecting component. Through this setting, when transporting materials, the drone and the books can be placed in different drone placement cavities respectively, avoiding collision between the books and the projector during transportation, which may cause damage to the projector. In addition, the use of two drones can also reduce the load of a single drone transportation, and the projector placement seat can be set between the two drones. When the projector needs to adjust its position during projection, the left and right lateral inclination of the projector can be adjusted by controlling the different degrees of expansion of the airbags of the two drones. By adjusting the rotation angle of the first rotating ring sleeve and the second rotating ring sleeve, the front and rear longitudinal inclination of the projector can be adjusted, thereby better adjusting the projector. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 To show the schematic diagram of the device structure;

[0021] Figure 2 for Figure 1 AA section view;

[0022] Figure 3 A schematic diagram of the structure of the promotional drone for the first embodiment;

[0023] Figure 4 for Figure 3 An enlarged view B and an enlarged view C of the same;

[0024] Figure 5 A schematic diagram of the structure of the propaganda drone when the wind direction adjustment component is deployed;

[0025] Figure 6 It is a schematic diagram of the rotating circular frame structure;

[0026] Figure 7 for Figure 6 The enlarged view E and the magnified view F;

[0027] Figure 8 Promoting drones for the first embodiment of the projected state;

[0028] Fig. 9 A schematic diagram of the structure of the promotional drone for the second embodiment;

[0029] Fig.10 is a schematic diagram of the connection component structure;

[0030] Fig.11 Promoting drones for the second embodiment of the projected state;

[0031] Fig.12 This is a simplified structural diagram of a wind direction adjustment assembly according to another embodiment.

[0032] Among them, 1. Display stand; 2. Propaganda column; 3. Status bar; 4. Book and information placement area; 5. Charging port 1; 6. Charging port 2; 7. Book stacking assembly; 8. Propaganda drone; 9. Spherical outer frame assembly; 10. Rotor assembly; 11. Wind direction adjustment assembly; 12. Placement cavity; 13. Placement of ball plate; 14. Vertical support rod; 15. Top horizontal circle; 16. Middle horizontal circle; 17. Rotating round frame; 18. Upper retractable Cloth roll; 19, flexible cloth; 20, drooping rod group; 21, left winding cable; 22, right winding cable; 23, main rod; 24, left telescopic rod; 25, right telescopic rod; 26, books and materials; 27, projector; 28, lower magnetic seat 1; 29, rotating ring body; 30, accommodating chamber 1; 31, sliding hinge seat 1; 32, sliding hinge seat 2; 33, bottom plate 1; 34, first ear; 35, second ear; 3 6. hinge hole; 37. roller support hole 1; 38. roller support hole 2; 39. airbag; 40. cable; 41. rotor bracket 1; 42. rotor bracket 2; 43. rotor bracket 3; 44. rotor bracket 4; 45. blade; 46. connecting assembly; 47. connecting rod 1; 48. connecting rod 2; 49. adjustable plate group; 50. push rotor; 51. support plate; 52. first rotating ring; 53. second Rotating ring sleeve; 54, upper magnetic seat; 55, wire hole; 56, rear rotating shaft; 57, base; 58, side supporting wall; 59, upper display frame; 60, book pushing board; 61, pushing cylinder; 62, winding drum; 63, cable; 64, winding edge cloth one; 65, winding edge cloth two; 66, wire hole one; 67, wire hole two; 68, winding and releasing rope one; 69, winding and releasing rope two; 70, spherical outer frame; 71, accommodating cavity two. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with the examples. However, the present invention is not limited to the following examples. The implementation conditions used in the examples can be further adjusted according to the different requirements of specific use, and the implementation conditions not specified are conventional conditions in the industry. The technical features involved in each embodiment of the present invention can be combined with each other as long as they do not conflict with each other.

[0034] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0035] The disclosure below provides many different embodiments or examples to implement different structures of the embodiments of the present invention. In order to simplify the disclosure of the embodiments of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present invention. In addition, the embodiments of the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed.

[0036] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0037] Example 1

[0038] like Figure 1-8 As shown, a display device for publicity includes: a display rack 1, a publicity column 2, a status column 3 and a book and material placement area 4, wherein the publicity column 2 and the status column 3 are arranged at the upper end of the display rack 1, and the book and material placement area 4 is arranged at the lower end of the display rack 1. A plurality of charging ports are also arranged at the top of the display rack 1, and the plurality of charging ports are used to connect with a publicity drone 8, and the publicity drone 8 is parked at the top of the display rack 1 ( Figure 1(not shown), the propaganda column 2 displays propaganda content, such as by posting painting-related propaganda content, or it can be set as an electronic display screen to display the propaganda content. The status bar 3 is set on the side of the propaganda column 2, and is used to display the learning status of the content of the propaganda column 2. If the learning object A has completed the learning, the status bar 3 will display that the learning object A has completed the learning at a specific place on a certain day. If there are still learning objects that have not learned, the status bar 3 will display reminder information such as learning object B has not learned yet, please follow up the learning in time, etc. The reminder information can be transmitted to the mobile phone or other mobile devices of the learning object B through the Internet, WeChat, APP, etc., and the learning object B can register the learning time, learning content, learning address and other information on WeChat or APP. After receiving the registered information, the display stand 1 sends the registered information to the promotional drone 8. The promotional drone 8 flies from the top of the propaganda column 2 to the book and material placement area 4. The book push-and-place assembly 7 at the rear end of the book placement area 4 is actuated to push the corresponding book and material 26 into the placement cavity 12 of the promotional drone 8, and then the projector 27 is also placed in the placement cavity 12 (such as by manual removal, or the projector 27 can be placed in the book and material placement area 4 in advance, and pushed into the placement cavity 12 by the action of the book push-and-place assembly). The promotional drone 8 includes a spherical outer frame assembly 9 and a rotor assembly 10. The rotor assembly 10 is arranged at the upper end of the spherical outer frame assembly 9 to provide power for its flight. The spherical outer frame assembly 9 includes a spherical outer frame 70 and a lower magnetic seat 28. The spherical outer frame 70 includes a top horizontal circle 15, an intermediate horizontal circle 16, a ball plate 13 and a plurality of vertical support rods 14. The top horizontal circle 15, the intermediate horizontal circle 16 and the ball plate 13 are arranged horizontally from top to bottom, and are connected and supported by the plurality of vertical support rods 14. An air bag 39 and a corresponding air supply assembly are arranged at the upper end of the ball plate 13 (the air supply assembly is not specifically shown in the figure. The air supply assembly only needs to be able to supply air to the air bag 39. The specific air supply assembly is common knowledge in the art and will not be repeated here. The air supply assembly is The gas provided in the airbag 39 can be hydrogen or helium). When the placement cavity 12 is used as a carrying space to load the projector 27 and the books and materials 26, the airbag 39 is in an airless contraction state. The projector 27 and the books and materials 26 are placed on the placement ball plate 13. The placement cavity 12 is formed inside the spherical outer frame 70. After the projector 27 and the books and materials 26 are loaded, the rotor assembly 10 is activated and flies to the corresponding meeting room or study room or other learning location according to the registered time and place. After the promotional drone 8 arrives, the arrival information is sent to the mobile phone or other mobile device of the learning object B. After receiving it, the learning object B arrives at the promotional drone 8 and takes out the projector 27 and the books and materials 26. Figure 8As shown, the projector 27 is installed at the lower end of the lower magnetic seat 28, and at the same time, the airbag 39 is filled with hydrogen or helium, and the airbag 39 begins to expand. After expanding to a certain extent, the inflation is stopped, and at the same time, the promotional drone 8 is provided with buoyancy by the gas in the airbag 39 and is in a suspended state. At this time, the action of the rotor assembly 10 can be stopped, and the cable 40 is connected between the projector 27 and the charging plug (the charging plug is not shown, and a normal charging plug can be used). In this way, the cable 40 can both power the projector 27 and tether the promotional drone 8. The projector 27 starts to work and delivers pre-recorded or stored Good related promotional videos or images or texts. After learning, the promotional drone 8 records that the learning object B has learned, and then transmits the record back to the status bar 3. The status bar 3 is updated to record that the learning object B has learned. Through the above-mentioned display device, it can grasp the learning situation of each learning object. When learning is needed, the learning object B can choose the learning time, content and location, and then the display device will arrange it. The learning materials and related audio and video can be transported to the learning location, ensuring the safety of the materials while avoiding the trouble of preparing materials, so that the promotion work can be better carried out. After learning is completed, the rotor assembly 10 moves, and the air in the airbag 39 is discharged at the same time. The airbag 39 gradually shrinks, and then the projector 27 and the cable 40 are removed, and the relevant books and materials 26 are retrieved, and then placed in the placement cavity 12 again. The promotional drone 8 flies back to the display rack 1. After putting the books and materials 26 and the projector 27 back to their original places, the promotional drone 8 returns to the charging port for charging.

[0039] To ensure that the promotional information can be conveyed effectively, follow-up learning reminder information can also be transmitted to the learners' mobile phones or other mobile devices through the Internet, WeChat, or APP.

[0040] In addition, in order to ensure that the drone can verify the integrity of the projector and book materials, a camera can also be set on the promotional drone 8. When it detects that the projector and book materials are put back into the placement cavity 12, the camera takes pictures and compares them with the pre-stored images. After the comparison is successful, the projector and book materials are returned, and the promotional drone 8 starts to fly back to the display rack 1. If a projector or book materials are missing, a prompt is issued until all objects are returned and the promotional drone 8 starts to fly back to the display rack 1.

[0041] In addition, in order to facilitate the return of the books and materials 26 and the projector 27 to their original positions, a robot can be set on the display rack 1 or around it, and the projector 27 and the books and materials 26 can be returned to their original positions by the robot's manipulator. The specific robot structure is common knowledge in the field and is not the focus of this application, so it will not be elaborated here.

[0042] like Figure 3-7As shown, the promotional drone 8 also includes a wind direction adjustment component 11, which is rotatably arranged in the top horizontal circle 15. The wind direction adjustment component 11 includes: a rotating circular frame 17, an upper winding cloth roller 18, a flexible cloth 19, a drooping rod group 20, a left winding cable 21 and a right winding cable 22. The rotating circular frame 17 is rotatably arranged on the inner side of the top horizontal circle 15, the flexible cloth 19 is wound on the upper winding cloth roller 18, and the lower end of the flexible cloth 19 is fixedly arranged in the middle of the drooping rod group 20, the left winding cable 21 and the right winding cable 22 are both arranged at the lower end of the rotating circular frame 17, and the ends of the left winding cable 21 and the right winding cable 22 are respectively connected to the two sides of the drooping rod group 20, and the length of the flexible cloth 19 extended can be controlled by controlling the extension and shortening of the left winding cable 21 and the right winding cable 22.

[0043] Furthermore, a return torsion spring (not shown in the figure) is arranged between the upper cloth winding roller 18 and the top horizontal circle 15. The left and right winding cable members 21 and 22 have the same structure and both include a winding drum 62 and a cable member 63. The cable member 63 is wound on the winding drum 62. The end of the cable member 63 is connected to the drooping rod group 20. The gravity of the drooping rod group 20 can straighten the flexible cloth 19. When it is necessary to unfold the flexible cloth 19, the left and right winding cable members 21 and 22 are stretched, and the flexible cloth 19 is pulled out by the gravity of the drooping rod group 20. At the same time, the return torsion spring is also twisted to store restoring force. After being pulled out into place, the left and right winding cable members 21 and 22 stop moving. When it is necessary to retract the flexible cloth 19, the left and right winding cable members 21 and 22 are retracted, and the return torsion spring releases the stored restoring force to drive the flexible cloth 19 to retract.

[0044] In order to enable the wind direction adjustment component 11 to better utilize wind power for sailing or turning, the drooping rod group 20 includes a main rod 23 and a left telescopic rod 24 and a right telescopic rod 25 telescopically arranged at both ends of the main rod 23. The left telescopic rod 24 and the right telescopic rod 25 can be actively extended and retracted by means of an oil cylinder or a telescopic cylinder. The left telescopic rod 24 and the right telescopic rod 25 extend when the flexible cloth 19 is stretched, and can be stuck into the lower end of the middle horizontal circle 16. In this way, the flexible cloth 19 can be fixed. A rotating driving power source is provided between the top horizontal circle 15 and the rotating circular frame 17. The rotating driving power source can be provided by providing a gear ring on the outer periphery of the rotating circular frame 17, and providing a driving motor with a driving gear in the top horizontal circle 15. The driving gear is driven to rotate by the rotation of the driving motor, thereby driving the rotating circular frame 17 to rotate. In addition, in order to cooperate with the wind direction adjustment component 11 Action, a wind sensor is also provided at the spherical outer frame 70 (not shown in the figure, the specific structure is common knowledge in this field, and will not be repeated here), which can detect the size and direction of the wind. When it is detected that the wind direction is the same as the forward direction of the promotional drone 8, the flexible cloth 19 is extended, and the left telescopic rod 24 and the right telescopic rod 25 are inserted into the lower end of the middle horizontal circle 16. At this time, the flexible cloth 19 is equivalent to a sail, so that the promotional drone 8 can be operated faster and more energy-saving; in addition, if the promotional drone needs to turn, the rotating circular frame 17 can be driven to rotate relative to the top horizontal circle 15, so that the flexible cloth 19 forms a spiral structure, so that the wind can be used to form a turning force, so that the turning of the promotional drone 8 can be more flexible, and its operating power can be saved, and the operation of the promotional drone 8 can be better controlled.

[0045] Furthermore, if Figure 6-7As shown, the rotating circular frame 17 includes a rotating ring body 29 and a sliding hinge seat 1 31 and a sliding hinge seat 2 32 arranged at the lower end of the rotating ring body 29. The lower end of the rotating ring body 29 is provided with a accommodating cavity 1 30 and an accommodating cavity 2 71. The sliding hinge seat 1 31 is slidably arranged in the accommodating cavity 1 30, and the sliding hinge seat 2 32 is slidably arranged in the accommodating cavity 2 71. The structures of the sliding hinge seat 1 31 and the sliding hinge seat 2 32 are the same, and both include a bottom plate 1 33 and a first ear 34 and a second ear 36 arranged on the bottom plate 1 33. The first ear 34 and the second ear 36 are both provided with hinge holes 36. The sliding hinge seat 1 31 and the sliding hinge seat 2 32 are respectively slidably arranged It is placed in the accommodating chamber 1 30 and the accommodating chamber 2 71, a first elastic member is arranged between the sliding hinge seat 1 31 and the accommodating chamber 1 30, and a second elastic member is arranged between the sliding hinge seat 2 32 and the accommodating chamber 2 71. A roller supporting hole 1 37 and a roller supporting hole 2 38 are respectively opened on the inner side of the rotating ring body 29, and the two ends of the upper cloth winding roller 18 are respectively rotatably arranged in the roller supporting hole 1 37 and the roller supporting hole 2 38, and the winding drum 62 is rotatably arranged in the hinge hole 36. In addition, the winding drum 62 and the upper cloth winding roller 18 both include a rotating drive source, such as a rotating motor (not shown in the figure, the specific drive source structure is common knowledge in the field, not the focus of this application, so it will not be repeated). The arrangement of the accommodating chamber 1 30 and the accommodating chamber 2 71 is such that, under normal circumstances, the sliding hinge seat 1 and the sliding hinge seat 2 32 can be maintained at the lower end of the rotating ring body 29 by the first elastic member and the second elastic member, and can be retracted into the rotating ring body 29 when the airbag 39 fills the spherical outer frame 70, thereby ensuring that the airbag 39 will not be affected when fully deployed, thereby ensuring the safe use of the airbag 39.

[0046] In addition, if Figure 8 As shown, the rotor assembly 10 includes a rotor bracket 1 41, a rotor bracket 2 42, a rotor bracket 3 43, a rotor bracket 44, and blades 45 arranged on the rotor bracket 1 41, the rotor bracket 2 42, the rotor bracket 3 43, and the rotor bracket 44. The blades 45 can be rotationally driven by setting a separate drive motor. This is common knowledge in the art and the specific drive motor structure will not be repeated.

[0047] In addition, the lower magnetic seat 27 can be configured as a base with an electromagnet inside, and a magnetic structure is correspondingly arranged at the upper end of the projector 27, such as a permanent magnet or an electromagnet. The electromagnet of the lower magnetic seat 27 is in a power-off state under normal circumstances, and when the projector needs to be placed, the electromagnet is charged, so that the projector 27 can be attracted to perform projection; in addition, the specific combination method of the projector and the lower magnetic seat can also be through a detachable mechanical connection method such as a pin connection, a hook connection, etc. The specific mechanical connection method is common knowledge in the field and will not be repeated here.

[0048] like Figure 1 As shown, the display rack 1 is provided with a base 57, a side supporting wall 58 and an upper display frame 59 from bottom to top in sequence, the base 57 and the side supporting wall 58 form the book material placement area 4, the book pushing and placing assembly 7 is arranged on the side supporting wall 58, and includes a plurality of pushing cylinders 61 and a plurality of book pushing boards 60, the number of the pushing cylinders 61 and the number of the book pushing boards 60 are the same, the book pushing boards 60 are arranged side by side and closely, and the extension and retraction of the book pushing boards 60 is driven by the extension and retraction of the pushing cylinders 61, so that the selection of books and materials 26 can be realized.

[0049] like Figure 1 As shown, the charging port includes charging port 1 5 and charging port 2 6, which are used to charge the promotional drone 8.

[0050] In addition, what is not shown in the figure is that an opening and closing door is provided on one side of the spherical outer frame 70. The opening and closing door can be provided with part of the vertical support rods 14 and the middle horizontal circle 16 as a door structure, and then the door structure is opened and closed by a structure such as a cylinder or an oil cylinder. The specific opening and closing door structure is common knowledge in the art. As long as the placement cavity 12 can be opened and closed, books and projectors can be placed in the placement cavity 12 or taken out from the placement cavity 12. It is not the focus of this application, so it will not be described here. In addition to the sliding door structure, the opening and closing door can also be a sliding door, a hinged door, etc.

[0051] Example 2

[0052] As attached Figure 9-11 As shown, the main difference between Example 2 and Example 1 is that the number of the promotional drones 8 in Example 2 is 2, and they are connected by a connecting component 46, and the magnetic seat in Example 2 is placed on the connecting component 46 instead of being set at the lower end of the spherical outer frame 70, specifically:

[0053] Two promotional drones 8 are connected through a connecting assembly 46, which includes a connecting rod 1 47, a connecting rod 2 48, an adjustable plate group 49 connecting the connecting rod 1 47 and the connecting rod 2 48, and a propulsion rotor 50 arranged on the adjustable plate group 49. One end of the connecting rod 1 47 is connected to a promotional drone 8, and the other end is connected to the adjustable plate group 49; one end of the connecting rod 2 48 is connected to another promotional drone 8, and the other end is connected to the adjustable plate group 49. The adjustment plate group 49 is rotatably connected to the connecting rod 1 47, and the adjustable plate group 49 is also rotatably connected to the connecting rod 2 48. The adjustable plate group 49 can adjust its inclination angle relative to the two promotional drones 8. The connecting rod 1 47 and the connecting rod 2 48 are respectively connected to the two sides of the adjustable plate group 49, and the pushing rotor 50 is arranged on the rear side of the adjustable plate group 49. The projector 27 is installed on the upper end of the adjustable plate group 49 when projecting.

[0054] like Fig.10 As shown, the adjustable plate group 49 includes a support plate 51, a first rotating ring sleeve 52 and a second rotating ring sleeve 53 fixedly arranged on both sides of the support plate 51, and also includes an upper magnetic seat 54 fixedly arranged on the upper end of the support plate 51 and a rear rotating shaft 56 fixedly arranged on the rear side of the support plate 51. The pushing rotor 50 is arranged on the rear rotating shaft 56. In addition, a wire hole 55 is opened in the support plate 51.

[0055] One end of the connecting rod 1 47 extends into the first rotating ring sleeve 52, and the connecting rod 2 48 extends into the second rotating ring sleeve 53. A rotation drive device 1 and a rotation drive device 2 are respectively arranged in the first rotating ring sleeve 52 and the second rotating ring sleeve 53. The rotation drive device 1 and the rotation drive device 2 both include a rotation drive motor. A driving ring gear is arranged on the periphery of the connecting rod 2 48 and the connecting rod 1 47. The driving ring gear is rotated by the rotation of the rotation drive motor, thereby realizing the angle adjustment of the adjustable plate group 49, and the projection angle of the projector can be adjusted.

[0056] When performing projection operation, the projector 27 is set on the upper magnetic seat 2 54. By setting a magnetic structure, such as an electromagnet or a permanent magnet, at the lower end of the projector, and setting an electromagnet in the upper magnetic seat 2 54, when the projector needs to be fixed, the electromagnet in the upper magnetic seat 2 54 is energized to generate magnetic force, thereby fixing the projector.

[0057] In addition, the suspension height of the two promotional drones 8 can be adjusted by adjusting the inflation of the two air bags 39, thereby adjusting the horizontality of the support plate 51, which can adjust the projection angle of the projector 27, thereby expanding the adjustment range of the projection angle of the projector. The cable 40 can pass through the wire hole 55, so that the cable 40 can be easily inserted into the socket.

[0058] Example 3

[0059] In addition, the only difference from the first and second embodiments is the structure of the specific wind direction adjustment component 11, which is as follows:

[0060] like Fig.12 As shown, the wind direction adjustment component 11 includes: a rotating circular frame 17, an upper cloth winding roller 18, a flexible cloth 19, a drooping rod group 20, a retracting rope 1 68 and a retracting rope 2 69. The rotating circular frame 17 is rotatably arranged on the inner side of the top horizontal circle 15. The flexible cloth 19 is wound on the upper cloth winding roller 18, and the lower end of the flexible cloth 19 is fixedly arranged in the middle of the drooping rod group 20. The retracting rope 1 68 is arranged at one end of the drooping rod group 20 and the lower end of the spherical outer frame 70. The retracting rope 2 69 is arranged at the other end of the drooping rod group 20 and the lower end of the spherical outer frame 70. When the flexible cloth 19 needs to be pulled out, the retracting rope 1 68 and the retracting rope 2 69 are retracted (as can be achieved by setting a drum structure), and the upper cloth winding roller 18 is in an unwinding state.

[0061] In order to further increase the wind-receiving area of ​​the flexible cloth 19, the drooping rod group 20 includes a main rod 23 and a left telescopic rod 24 and a right telescopic rod 25 telescopically arranged at both ends of the main rod 23. The left telescopic rod 24 and the right telescopic rod 25 can be actively telescoped by means of an oil cylinder or a telescopic cylinder. A rolling edge cloth 1 64 is arranged at the left telescopic rod 24, and a rolling edge cloth 2 65 is arranged at the right telescopic rod 25. One end of the rolling edge cloth 1 64 is wound around the upper rolling cloth roller 18, and the other end of the rolling edge cloth 1 64 is wound around the upper rolling cloth roller 18. One end is arranged on the left telescopic rod 24, and a slot hole 1 is arranged on the main rod 23 for the rolling edge cloth 1 64 to pass through. One end of the rolling edge cloth 2 65 is wound on the upper rolling cloth roller 18, and the other end of the rolling edge cloth 2 65 is arranged on the right telescopic rod 25, and a slot hole 2 is arranged on the main rod 23 for the rolling edge cloth 2 65 to pass through. When the left telescopic rod 24 and the right telescopic rod 25 are extended, the lateral areas of the rolling edge cloth 1 64 and the rolling edge cloth 2 65 become larger, thereby increasing the wind receiving area of ​​the flexible cloth 19.

[0062] Furthermore, a wire hole 1 66 is provided on the left telescopic rod 24 , a wire hole 2 67 is provided on the right telescopic rod 25 , the upper end of the retractable rope 1 68 is fixed in the wire hole 1 66 , and the upper end of the retractable rope 2 69 is fixed in the wire hole 2 67 .

[0063] When the flexible cloth 19 needs to be retracted, the left telescopic rod 24 and the right telescopic rod 25 are retracted, and at the same time, the upper cloth winding roller 18 winds up the flexible cloth 19, and the retracting rope 1 68 and the retracting rope 2 69 are in the rope releasing state.

[0064] To facilitate those skilled in the art to understand the working principle of the promotional drone, the action process of the promotional drone is described as follows: after the promotional drone 8 receives the instruction that the learning object needs to learn, the promotional drone 8 flies down from the upper end of the display rack 1, and then pushes the cylinder 61 to select the book pushing board 60 corresponding to the book material according to the information needed by the learning object for this learning. In addition, the door structure of the promotional drone 8 is in an open state, and the outward moving book pushing board 60 pushes the book material to the upper end of the placement ball plate 13 through the door structure. At this time, the airbag 39 at the upper end of the placement ball plate 13 is in a retracted state. At this time, the airbag 39 can also play a role in buffering and shock absorption. After the book material is rotated, the projector is pushed by the book pushing board 60 at the corresponding position and enters the placement cavity 12 through the door structure. After being accommodated, the door structure is closed. The promotional drone 8 plans its flight according to the learning time and location selected by the terminal. During the flight, if the wind sensor detects the direction of the wind and the drone If the flight direction is the same, the flexible cloth of the wind direction adjustment component 11 is in an unfolded state, and the flexible cloth is used as a sail. With the help of wind power, the drone flight is faster and more energy-efficient; after arriving at the designated location, the projector and books are taken out by personnel, the projector is installed, and then the airbag 39 is inflated. Finally, the expansion of the airbag 39 provides power for the propaganda drone 8 to hover, and the rotation speed of the rotor assembly 10 is gradually reduced until the propaganda drone 8 is in a hovering state and the rotor assembly 10 is completely in a stopped state. After the power cord is plugged in, the power cord can both supply power and tether the propaganda drone 8. After power is turned on, the projector works, so that the content on the propaganda column 2 can be output through projection for relevant personnel to study, and after the study is completed, the propaganda drone 8 can synchronously send the learning completion status to the status bar 3, and the status bar 3 is updated accordingly, so that a very clear overall and comprehensive understanding of the learning situation of each learning object can be made. After the relevant personnel have completed their study, the personnel will put the books and projectors into the promotional drone 8, and the promotional drone 8 will fly back to the display rack 1. At the same time, the books and projectors will be put back to their original positions by the robot, and the promotional drone 8 will return to charge, completing an on-site promotion work.

Claims

1. A display device for publicity, comprising: A display stand (1), a publicity column (2), a status bar (3) and a book and material placement area (4), wherein the publicity column (2) and the status bar (3) are arranged at the upper end of the display stand (1), and the book and material placement area (4) is arranged at the lower end of the display stand (1), characterized in that: a plurality of charging ports are also arranged at the top of the display stand (1), and the plurality of charging ports are used to connect with a publicity drone (8), and the publicity drone (8) is parked at the top of the display stand (1), the publicity column (2) displays publicity content, and the status bar (3) is used to display the learning status of each learning object about the content of the publicity column (2), and if there is a situation of not learning, the status bar (3) generates a reminder message for timely follow-up learning, and the reminder message is transmitted to the learning object The learning object registers the learning time, learning content and learning address information. After receiving the registration information, the display rack (1) sends the registration information to the publicity drone (8). The publicity drone (8) flies from the top of the publicity column (2) to the book material placement area (4). The book push and place component (7) at the rear end of the book placement area (4) is activated to push the corresponding book material (26) into the placement cavity (12) of the publicity drone (8), and then the projector (27) is also placed in the placement cavity (12). After being transported to the designated location by the publicity drone (8), the book material (26) and the projector (27) are taken out for learning. After the learning is completed, the publicity drone (8) sends the learning completion status to the publicity column (2), and the publicity column (2) displays the updated learning status.

2. A display device for publicity according to claim 1, characterized in that: The promotional drone (8) comprises a spherical outer frame assembly (9) and a rotor assembly (10), wherein the rotor assembly (10) is arranged at the upper end of the spherical outer frame assembly (9), the spherical outer frame assembly (9) comprises a spherical outer frame (70) and a lower magnetic suction seat (28), the spherical outer frame (70) comprises a top horizontal circle (15), a middle horizontal circle (16), a ball plate (13) and a plurality of vertical support rods (14), wherein the top horizontal circle (15), the middle horizontal circle (16) and the ball plate (13) are arranged horizontally from top to bottom. The spherical outer frame (70) is provided with a plurality of vertical support rods (14) for connection and support. An air bag (39) and an air supply assembly are provided at the upper end of the ball placement plate (13). When the placement cavity (12) is used as a carrying space to load a projector (27) and books and materials (26), the air bag (39) is in an airless contracted state. The projector (27) and books and materials (26) are placed on the ball placement plate (13). The placement cavity (12) is formed inside the spherical outer frame (70). After the projector (27) and books and materials (26) are loaded, The rotor assembly (10) is in motion, and the user arrives at the designated location according to the registered time and location. The projector (27) and the books and materials (26) are taken out, and the projector (27) is installed at the lower end of the lower magnetic seat (28). At the same time, the airbag (39) is filled with hydrogen or helium, and the airbag (39) begins to expand. After expanding to a certain extent, the inflation is stopped, and the propaganda drone (8) is provided with buoyancy by the gas in the airbag (39) and is in a suspended state. The rotor assembly (10) is stopped, and the cable (40) is connected to the projector. The projector (27) starts working between the display rack (27) and the charging plug. After learning is completed, the rotor assembly (10) moves, and the air in the airbag (39) is discharged. The airbag (39) gradually shrinks, and then the projector (27) and the cable (40) are removed, and the relevant books and materials (26) are taken back and placed in the placement cavity (12). The promotional drone (8) flies back to the display rack (1), and after the books and materials (26) and the projector (27) are put back to their original places, the promotional drone (8) returns to the charging port for charging.

3. A display device for publicity according to claim 2, characterized in that: The propaganda drone (8) further comprises a wind direction adjustment component (11), the wind direction adjustment component (11) is rotatably arranged in the top horizontal circle (15), the wind direction adjustment component (11) comprises: a rotating round frame (17), an upper winding cloth roller (18), a flexible cloth (19), a drooping rod group (20), a left winding cable member (21) and a right winding cable member (22), the rotating round frame (17) is rotatably arranged on the inner side of the top horizontal circle (15), the flexible cloth (19) is wound on the upper winding cloth roller (18), and the flexible cloth (19) is wound on the upper winding cloth roller (19). The flexible cloth (19) is mounted on a cloth winding roller (18), and the lower end of the flexible cloth (19) is fixedly arranged in the middle of the drooping rod group (20). The left winding cable (21) and the right winding cable (22) are both arranged at the lower end of the rotating circular frame (17). The ends of the left winding cable (21) and the right winding cable (22) are respectively connected to the two sides of the drooping rod group (20). The extended length of the flexible cloth (19) can be controlled by controlling the extension and contraction of the left winding cable (21) and the right winding cable (22).

4. A display device for publicity according to claim 3, characterized in that: A return torsion spring is arranged between the upper cloth winding roller (18) and the top horizontal circle (15); the left winding cable member (21) and the right winding cable member (22) have the same structure, both comprising a winding drum (62) and a cable member (63); the cable member (63) is wound on the winding drum (62); the end of the cable member (63) is connected to the drooping rod group (20); the gravity of the drooping rod group (20) can straighten the flexible cloth (19); when the flexible cloth (19) needs to be unfolded, , driving the left winding cable (21) and the right winding cable (22) to stretch, the flexible cloth (19) is pulled out by the gravity of the drooping rod group (20), and at the same time the return torsion spring is also twisted to store the restoring force. After being pulled out to the right position, the left winding cable (21) and the right winding cable (22) stop moving. When the flexible cloth (19) needs to be retracted, the left winding cable (21) and the right winding cable (22) are driven to retract, and the return torsion spring releases the stored restoring force, driving the flexible cloth (19) to be retracted.

5. A display device for publicity according to claim 4, characterized in that: The drooping rod group (20) comprises a main rod (23) and a left telescopic rod (24) and a right telescopic rod (25) which are telescopically arranged at both ends of the main rod (23). The left telescopic rod (24) and the right telescopic rod (25) can be actively telescopic. When the flexible cloth (19) is stretched, the left telescopic rod (24) and the right telescopic rod (25) extend out and can be inserted into the lower end of the middle horizontal circle (16) to fix the flexible cloth (19). A rotation driving power source is arranged between the top horizontal circle (15) and the rotating circular frame (17). A wind sensor is arranged at the outer frame (70) and can detect the size and direction of the wind. When it is detected that the wind direction is the same as the forward direction of the promotional drone (8), the flexible cloth (19) is extended, and at the same time, the left telescopic rod (24) and the right telescopic rod (25) are inserted into the lower end of the middle horizontal circle (16). When the promotional drone needs to turn, the rotating circular frame (17) can be driven to rotate relative to the top horizontal circle (15), so that the flexible cloth (19) forms a spiral structure, so that the wind force can be used to form a turning force.

6. A display device for publicity according to claim 5, characterized in that: The rotating circular frame (17) comprises a rotating ring body (29) and a sliding hinge seat 1 (31) and a sliding hinge seat 2 (32) arranged at the lower end of the rotating ring body (29); the lower end of the rotating ring body (29) is provided with a receiving cavity 1 (30) and a receiving cavity 2 (71); the sliding hinge seat 1 (31) is slidably arranged in the receiving cavity 1 (30); the sliding hinge seat 2 (32) is slidably arranged in the receiving cavity 2 (71); the sliding hinge seat 1 (31) and the sliding hinge seat 2 (32) have the same structure, and both comprise a bottom plate 1 (33) and a first support ear (34) and a second support ear (35) arranged on the bottom plate 1 (33); the first support ear (34) and the second support ear A hinge hole (36) is provided on each of the two rotating ring bodies (29); the sliding hinge seat 1 (31) and the sliding hinge seat 2 (32) are respectively slidably arranged in the accommodating chamber 1 (30) and the accommodating chamber 2 (71); a first elastic member is arranged between the sliding hinge seat 1 (31) and the accommodating chamber 1 (30); a second elastic member is arranged between the sliding hinge seat 2 (32) and the accommodating chamber 2 (71); a roller support hole 1 (37) and a roller support hole 2 (38) are respectively provided on the inner side of the rotating ring body (29); the two ends of the upper cloth winding roller (18) are respectively rotatably arranged in the roller support hole 1 (37) and the roller support hole 2 (38); and the winding drum (62) is rotatably arranged in the hinge hole (36).

7. A display device for publicity according to claim 6, characterized in that: The display rack (1) is provided with a base (57), a side support wall (58) and an upper display frame (59) in sequence from bottom to top. The base (57) and the side support wall (58) form the book and material placement area (4). The book pushing and placing assembly (7) is arranged on the side support wall (58), and comprises a plurality of pushing cylinders (61) and a plurality of book pushing boards (60). The number of the pushing cylinders (61) and the number of the book pushing boards (60) are the same. The book pushing boards (60) are arranged side by side and closely adjacent to each other. The book pushing boards (60) are driven to be extended and retracted by the extension and retraction of the pushing cylinders (61), thereby enabling the selection of books and materials (26).

8. A display device for publicity according to any one of claims 2 to 7, characterized in that: An opening and closing door is arranged on one side of the spherical outer frame (70).

9. A display device for publicity according to claim 2, characterized in that: Two promotional drones (8) are connected via a connecting assembly (46), wherein the connecting assembly (46) comprises a first connecting rod (47), a second connecting rod (48), an adjustable plate assembly (49) connecting the first connecting rod (47) and the second connecting rod (48), and a propulsion rotor (50) arranged on the adjustable plate assembly (49), wherein one end of the first connecting rod (47) is connected to one promotional drone (8), and the other end is connected to the adjustable plate assembly (49); one end of the second connecting rod (48) is connected to another promotional drone (8), and the other end is connected to the adjustable plate assembly (49). The adjustable plate group (49) is rotatably connected to the connecting rod one (47), and the adjustable plate group (49) is also rotatably connected to the connecting rod two (48). The adjustable plate group (49) can be used to adjust its inclination angle relative to the two promotional drones (8). The connecting rod one (47) and the connecting rod two (48) are respectively connected to the two sides of the adjustable plate group (49). The propulsion rotor (50) is arranged on the rear side of the adjustable plate group (49). The projector (27) is installed on the upper end of the adjustable plate group (49) when projecting.

10. A display device for publicity according to claim 2 or 9, characterized in that: The propaganda drone (8) further comprises a wind direction regulating component (11), the wind direction regulating component (11) being rotatably arranged in the top horizontal circle (15), the wind direction regulating component (11) comprising a rotating circular frame (17), an upper cloth winding roller (18), a flexible cloth (19), a drooping rod group (20), a first retracting rope (68) and a second retracting rope (69), the rotating circular frame (17) being rotatably arranged on the inner side of the top horizontal circle (15), the flexible cloth (19) being retracted in the upper retracting roller (18), and the flexible cloth (19) being retracted in the upper retracting roller (20). The cloth roller (18) is provided with the lower end of the flexible cloth (19) fixedly arranged in the middle of the drooping rod group (20), the retracting rope 1 (68) is arranged at one end of the drooping rod group (20) and the lower end of the spherical outer frame (70), and the retracting rope 2 (69) is arranged at the other end of the drooping rod group (20) and the lower end of the spherical outer frame (70). When the flexible cloth (19) needs to be pulled out, the retracting rope 1 (68) and the retracting rope 2 (69) are retracted, and the upper cloth reeling roller (18) is in an unwinding state.

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