Push-pull air display unit and multi-unmanned aerial vehicle combined display screen and control method

Abstract

The application discloses a push-pull type aerial display unit, a multi-unmanned aerial vehicle combined display screen and a control method. The push-pull type aerial display unit comprises an unmanned aerial vehicle, a display unit and a central support arranged between the display unit and the unmanned aerial vehicle. The display unit comprises a fixed block, a side movable block and a corner movable block. The rear side of the fixed block is provided with a fixed slide rail and a fixed slide block for slidingly connecting with the side movable block. The front side of the side movable block is provided with a movable slide block. The rear side of the corner movable block is provided with a movable slide rail. The application further comprises a side push-pull mechanism arranged between the fixed block and the side movable block and a corner push-pull mechanism. The application can realize the adjustment of the boundary size of the display unit in a push-pull mode with a front-rear staggered arrangement, and the adjustment is not interfered with each other. The side support and the corner support are adopted to form a triangular support, thereby constituting a stable support and improving the overall rigidity of the display unit. The structure of the motor driving the screw rod is adopted to adjust the sliding seat, and the structure has a good self-locking effect.

Description

Technical Field

[0001] This invention relates to an aerial display screen, and more specifically to a push-pull aerial display unit and a multi-UAV combined display screen and control method. Background Technology

[0002] In the air, drones are used as supports for display units, and several drones supporting display units form a large display screen. However, it is necessary to ensure that there are sufficient gaps between the displays to prevent collisions that could cause the drones to lose control. Therefore, attention needs to be paid to issues such as uniform spacing, alignment, communication signal interference, the impact of wind, aerial positioning algorithms, collision detection, and regular adjustments.

[0003] The collision detection mentioned above needs to be adjusted promptly when the detected boundary gap is lower than the set value. Since the large display screen is composed of several display units, each of which should be suspended in a set position, the outer contour size can only be adjusted for a single display unit, and cannot be adjusted by moving its position in the air.

[0004] Therefore, the inventors believe it is necessary to develop a push-pull aerial display unit and a multi-UAV combined display screen and control method, which can adjust the outer contour size of individual display units to improve the reliability of aerial display. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in the prior art by providing a push-pull aerial display unit, a multi-UAV combined display screen, and a control method.

[0006] The objective of this invention is achieved through the following technical solutions:

[0007] A push-pull aerial display unit includes a drone, a display unit, and a central support between the display unit and the drone. The display unit is square and includes a fixed block at the center, side movable blocks located on the four sides and rear of the fixed block, and corner movable blocks located at the four corners and front of the fixed block. The rear of the fixed block is provided with a fixed slide rail for sliding connection with the side movable blocks, and a fixed slider for sliding connection with the corner movable blocks. The front of the side movable blocks is provided with a movable slider that cooperates with the fixed slide rail. The rear of the corner movable blocks is provided with a movable slide rail that cooperates with the fixed slider. The unit also includes a side push-pull mechanism between the fixed block and the side movable blocks, and a corner push-pull mechanism between the fixed block and the corner movable blocks.

[0008] The further technical solution is as follows: the side push-pull mechanism includes a side support located between the side wall of the middle section of the central support and the rear middle section of the side movable block; the side support includes a side connecting seat fixedly connected to the inner side of the side movable block, a side sliding seat slidably connected to the central support, and a side outer connecting rod and a side connecting rod hinged between the side connecting seat and the side sliding seat; one end of a side inner connecting rod is also hinged at the hinge joint of the side outer connecting rod and the side connecting rod, and the other end of the side inner connecting rod is hinged to the side of the front end of the central support or the center of the fixed block;

[0009] The corner push-pull mechanism includes a corner bracket located between the side wall of the middle section of the central support and the middle section of the corner movable block; the corner bracket includes a corner connecting seat fixedly connected to the inner side of the corner movable block, a corner sliding seat slidably connected to the central support, and a corner outer connecting rod and a corner connecting rod hinged between the corner connecting seat and the corner sliding seat; one end of a corner inner connecting rod is also hinged at the hinge joint of the corner outer connecting rod and the corner connecting rod, and the other end of the corner inner connecting rod is hinged to the side of the front end of the central support or the center of the fixed block;

[0010] The central support is provided with four corner sliding grooves to fit into the corner sliding seat, and four side sliding grooves to fit into the side sliding seat;

[0011] The inner side of the side slide groove is also provided with a side lead screw that is connected to the side sliding seat in a transmission manner. One end of the side lead screw is connected to a side motor. The side motor drives the side lead screw to rotate, so as to drive the side sliding seat to move forward or backward, and then drive the side movable block to move inward or outward through the side connecting rod.

[0012] The inner side of the corner slide groove is also provided with a corner screw that is connected to the corner sliding seat in a transmission. One end of the corner screw is connected to a corner motor. The corner motor drives the corner screw to rotate, so as to drive the corner sliding seat to move forward or backward, and then drive the corner movable block to move inward or outward through the corner connecting rod.

[0013] When adjusting the boundary gap, the movement direction of the side active block is the same as that of the corner active block.

[0014] The further technical solution is as follows: the central support includes a far-end support fixedly connected to the fixed block, a near-end support fixedly connected to the UAV, and a sliding groove support disposed between the far-end support and the near-end support; the sliding groove support is provided with the side sliding groove and the corner sliding groove.

[0015] The further technical solution is as follows: the display unit is located on the side of the drone; it also includes a battery connected to the drone, and the battery and the display unit are respectively located on opposite sides of the drone.

[0016] The further technical solution is as follows: the display unit is a hollow skeleton structure, and the display element is provided on the body of the skeleton; the side motor and the corner motor constitute a boundary drive mechanism.

[0017] The present invention provides a multi-UAV combined display screen, comprising a plurality of matrix-distributed push-pull aerial display units; each display unit is provided with a boundary drive circuit that is communicatively connected to the flight control circuit of the UAV; when the boundary gap between adjacent display units is less than a set value, the boundary drive circuit outputs a control signal to the boundary drive mechanism to reduce the boundary position of the display unit so that the boundary gap is restored to a value greater than or equal to the set value.

[0018] The further technical solution is as follows: it also includes a backup display unit located behind the matrix-distributed display unit; in the matrix-distributed display circuit, if any display unit fails, it is removed from the matrix distribution position and replaced by the backup display unit.

[0019] The further technical solution is as follows: the UAV also includes a power supply circuit, a communication circuit, and a detection circuit for detecting boundary gaps connected to the flight control circuit.

[0020] A control method for a multi-drone combined display screen: when the detection circuit on only one side of a certain display unit detects a distance smaller than the boundary gap, it is identified as a passive unit, and the display unit adjacent to that side is identified as an active unit. The passive unit, corresponding to the side motor and corner motor of that side or all four sides, starts working in the same direction, causing the side active block and corner active block to move inward to increase the boundary gap to a value greater than or equal to a set value.

[0021] The further technical solution is as follows: the UAV is also equipped with a flight drive circuit connected to the flight control circuit, and is also equipped with several rotors and rotor motors connected to the rotor transmission. The control information of the flight drive circuit is used for the control of the rotor motors.

[0022] Compared with existing technologies, the beneficial effects of this invention are as follows: The push-pull aerial display unit of this invention has fixed blocks, side movable blocks, and corner movable blocks distributed in a staggered manner, as well as side push-pull mechanisms and corner push-pull mechanisms; the size of the display unit boundary is adjusted by a staggered push-pull method without interference. When the boundary gap of the multi-UAV combined display screen of this invention is smaller than a set value, the side movable blocks and corner movable blocks will begin to move, moving towards the rear and front sides of the fixed blocks respectively, to reduce the outer contour of the display unit, thereby ensuring a safe distance between the two display units and improving the reliability of the display screen when operating in the air. The side brackets and corner brackets used form a triangular support, constituting a stable support and improving the overall rigidity of the display unit. The structure of using a motor-driven lead screw to adjust the sliding seat has a good self-locking effect. Attached Figure Description

[0023] Figure 1 This is a front view of the display unit of a specific embodiment of the push-pull air display unit of the present invention (side brackets and corner brackets are not shown);

[0024] Figure 1A for Figure 1 A schematic diagram of the fixed block in the embodiment;

[0025] Figure 2 for Figure 1 Rear view;

[0026] Figure 3 for Figure 1 A cross-sectional view of the side active area of ​​the display unit in the embodiment;

[0027] Figure 4 for Figure 1 A cross-sectional view of the corner active area of ​​the display unit in the embodiment;

[0028] Figure 5 for Figure 1 A cross-sectional schematic diagram of the slide rail bracket in the embodiment;

[0029] Figure 6 This is a top view schematic diagram of a specific embodiment of the push-pull aerial display unit of the present invention;

[0030] Figure 7 for Figure 1 A schematic diagram of the central support structure in the embodiment;

[0031] Figure 8 for Figure 7 A partial view of the slide rail support section (only two motors are shown);

[0032] Figure 9This is a cross-sectional schematic diagram and a partial enlarged view of the slider and slide rail in another specific embodiment of the push-pull air display unit of the present invention;

[0033] Figure 10 This is an overall front view of a multi-drone combined display screen according to another embodiment of the present invention;

[0034] Figure 10A for Figure 10 Front view of the display unit in the embodiment;

[0035] Figure 11 This is a circuit connection diagram of another specific embodiment of the multi-drone combined display screen of the present invention (only the connection relationship between the control circuit, a drone, and a display unit is shown).

[0036] Figure Labels

[0037] S control system

[0038] 10 display units

[0039] 100 Boundary drive circuit 101 Display element

[0040] 112 Fixed slide rail 113 Fixed slider

[0041] 121 Movable slider 131 Movable slide rail

[0042] 11 Fixed Blocks

[0043] 12 Side Activity Blocks 13 Corner Activity Blocks

[0044] 20 drones

[0045] 201 Rotor 202 Rotor Motor

[0046] 30 Flight control circuit

[0047] 31 Power supply circuit 32 Communication circuit

[0048] 33 Detection Circuit 34 Flight Drive Circuit

[0049] 40 Central stent 401 Remote stent

[0050] 402 Proximal stent; 403 Slide stent

[0051] 42 Side bracket

[0052] 420 Side slide groove 421 Side connecting seat

[0053] 422 Side sliding seat 423 Side connecting rod

[0054] 424 Side lead screw; 425 Side motor

[0055] 43 Corner Bracket

[0056] 430 Corner slide groove; 431 Corner connecting seat

[0057] 432 Corner sliding seat; 433 Corner connecting rod

[0058] 434 Angle Screw; 435 Angle Motor; 80 Battery; 90 Control Circuit Detailed Implementation

[0059] To better understand the technical content of the present invention, the technical solution of the present invention will be further introduced and explained below with reference to specific embodiments, but is not limited thereto.

[0060] like Figures 1 to 8 As shown, the push-pull aerial display unit of the present invention includes a drone 20, a display unit 10, and a central support 40 disposed between the display unit 10 and the drone 20. The display unit 10 is square and includes a fixed block 11 located at the center, side movable blocks 12 located on the four sides of the fixed block 11 and behind it (with an overlapping portion between them for mounting slide rails and sliders), and corner movable blocks 13 located at the four corners of the fixed block 11 and in front of it (with an overlapping portion between them for mounting slide rails and sliders to increase sliding...). The stroke can be provided with a clearance groove 109); the rear side of the fixed block 11 is provided with a fixed slide rail 112 for sliding connection with the side movable block 12, and a fixed slider 113 for sliding connection with the corner movable block 13; the front side of the side movable block 12 is provided with a movable slider 121 that cooperates with the fixed slide rail 112; the rear side of the corner movable block 13 is provided with a movable slide rail 131 that cooperates with the fixed slider 113; it also includes a side push-pull mechanism provided between the fixed block and the side movable block, and a corner push-pull mechanism provided between the fixed block and the corner movable block. To ensure a reliable and stable sliding fit between the fixed slide rail 112 and the movable slider 121, and between the fixed slider 113 and the movable slide rail 131, dovetail slide rails and dovetail sliders are preferred. Two fixed slide rails 112 and four movable sliders 121 are used between the movable block and the fixed block on the same side. Four fixed sliders 113 and two movable slide rails 131 are used between the movable block and the fixed block at the same corner.

[0061] To ensure a strong, fixed connection between the slide rail and the slider when sliding is not required, in other embodiments, a rack can be provided on the side of the slide rail, and a toothed pressure block with a matching rack shape can be provided on the slider. The toothed pressure block is supported by a pin with a spring and an electromagnet. When sliding is not required, the toothed pressure block remains pressed against the rack under the force of the spring, forming a secure connection. When sliding is required, the electromagnet is energized, attracting the toothed pressure block away from the rack, allowing the slide rail and slider to slide automatically. The toothed pressure block and rack are preferably triangular in shape, with an angle of 30 to 60 degrees. This offers the following advantages: Ease of manufacturing: Triangular teeth are relatively simple and easy to manufacture through processing techniques, reducing manufacturing costs. Transmission efficiency: Triangular teeth provide relatively high transmission efficiency because the angle of the teeth makes the gear transmission smoother. Stability: Triangular teeth provide better stability during transmission, helping to reduce vibration, impact, and noise. Strength: Selecting a tooth profile angle within the range of 30 to 60 degrees provides sufficient locking force, preventing slippage between the toothed pressure block and the rack during locking. This is because a tooth profile angle selected within this range helps increase the adhesion of the gear transmission, improves the coefficient of friction, and thus prevents slippage.

[0062] The side push-pull mechanism includes a side support 42 located between the side wall of the middle section of the central support 40 and the rear middle section of the side movable block 12. The side support 42 includes a side connecting seat 421 fixedly connected to the inner side of the side movable block 12, a side sliding seat 422 slidably connected to the central support 40, and a side outer connecting rod 428 and a side connecting rod 423 hinged between the side connecting seat 421 and the side sliding seat 422. At the hinge point of the side outer connecting rod 428 and the side connecting rod 423, one end of a side inner connecting rod 429 is also hinged, and the other end of the side inner connecting rod 429 is hinged to the side of the front end of the central support 40 (in other embodiments, it may also be the center of the fixed block 10).

[0063] The corner push-pull mechanism includes a corner bracket 43 located between the side wall of the middle section of the central support 40 and the rear middle section of the corner movable block 13. The corner bracket 43 includes a corner connecting seat 431 fixedly connected to the inner side of the corner movable block 13, a corner sliding seat 432 slidably connected to the central support 40, and a corner outer connecting rod 438 and a corner connecting rod 433 hinged between the corner connecting seat 431 and the corner sliding seat 432. At the hinge joint of the corner outer connecting rod 438 and the corner connecting rod 433, one end of a corner inner connecting rod 439 is also hinged, and the other end of the corner inner connecting rod 439 is hinged to the side of the front end of the central support 40 (in other embodiments, it can also be the center of the fixed block 10).

[0064] The central support 40 is provided with four corner grooves 430 to fit into corner sliding seats 432, and four side grooves 420 to fit into side sliding seats 422.

[0065] When adjusting the boundary gap, the movement direction of the side active block 12 is the same as the movement direction of the corner active block 13.

[0066] The inner side of the corner slide groove 430 is also provided with a corner lead screw 434 that is connected to the corner sliding seat 432. One end of the corner lead screw 434 is connected to a corner motor 435. The corner motor 435 drives the corner lead screw 434 to rotate, thereby driving the corner sliding seat 432 to move forward or backward. Then, through the corner connecting rod 433, it drives the corner movable block 13 to rotate forward or backward. The inner side of the corner sliding seat 432 is provided with a corner nut seat 436 that is connected to the corner lead screw 434. The outer side of the corner sliding seat 432 is also provided with a corner outer stop 437, so that the corner sliding seat 432 is clamped in the corner slide groove 430 as a whole, and the corner lead screw 434 is only subjected to axial force, which improves the overall reliability and stability.

[0067] In other embodiments, to improve stability, the outer corner stop is further provided with an eccentric wheel acting on the outer side of the corner groove, and an eccentric motor with a worm gear reduction mechanism for driving the eccentric wheel. When the corner slide is not moving, the maximum eccentric position of the eccentric wheel is aligned with the outer side of the corner groove, generating a locking force (clamping force) on the corner slide. Before the corner motor rotates, the eccentric motor operates first. After the eccentric wheel deflects by an angle, its minimum eccentric position is aligned with the outer side of the corner groove. After releasing the locking force, the corner motor operates again, driving the corner slide to move. The eccentric motor and eccentric wheel are located on the outer corner stop, and the outer corner stop and the corner slide are detachable structures, making installation and maintenance very convenient. There can be two or four eccentric wheels, driven by one eccentric motor through a transmission mechanism such as gears. The angle range of the maximum eccentric position is between 30 and 60 degrees and the radius of the arc is the same, which makes it easier for the corner eccentric wheel in the locked state to maintain the self-locking state.

[0068] The inner side of the side slide groove 420 is also provided with a side lead screw 424 that is connected to the side sliding seat 422. One end of the side lead screw 424 is connected to a side motor 425. The side motor 425 drives the side lead screw 424 to rotate, thereby driving the side sliding seat 422 to move forward or backward. Then, through the side connecting rod 423, it drives the side movable block 12 to rotate forward or backward. The inner side of the side sliding seat 422 is provided with a side nut seat 426 that is connected to the side lead screw 424. The outer side of the side sliding seat 422 is also provided with a side outer stop 427, so that the side sliding seat 422 is clamped as a whole in the side slide groove 420, and the side lead screw 424 is only subjected to axial force, which improves the overall reliability and stability.

[0069] In other embodiments, to improve stability, the outer side stop is further provided with a side eccentric wheel acting on the outer side of the side slide groove, and a side eccentric motor with a worm gear reduction mechanism for driving the side eccentric wheel. When the side sliding seat is not moving, the maximum eccentric position of the side eccentric wheel is aligned with the outer side of the side slide groove, generating a locking force (clamping force) on the side sliding seat. Before the side motor rotates, the side eccentric motor works first. After the side eccentric wheel deflects by an angle, the minimum eccentric position is aligned with the outer side of the side slide groove. After releasing the locking force, the side motor works again, driving the side sliding seat to move. The side eccentric motor and the side eccentric wheel are located on the outer side stop, and the outer side stop and the side sliding seat are detachable structures, which is very convenient for installation and maintenance. There can be two or four side eccentric wheels, driven by one side eccentric motor through a transmission mechanism such as gears. The angle range of the maximum eccentric position is between 30 and 60 degrees and the radius of the arc is the same, which makes it easier for the side eccentric wheel in the locked state to maintain the self-locking state.

[0070] In other embodiments, electromagnetic locking pins are provided at positions where the fixed slider corresponds to the side of the movable slide rail, and at positions where the movable slider corresponds to the side of the fixed slide rail. The sides of both the movable and fixed slide rails are provided with racks corresponding to the electromagnetic locking pins. When no movement is required, the protruding tip of the electromagnetic locking pin is embedded in the toothed groove of the rack, forming a fixed connection between the two. When movement is required, the electromagnetic locking pin is energized, and the protruding tip disengages from the toothed groove of the rack, allowing free movement. The electromagnetic locking pin is controlled by a control circuit. Before movement is required, a control signal is output to the electromagnetic locking pin to separate its protruding tip from the rack before movement.

[0071] More specifically, the central support 40 adopts a segmented structure, which is easy to manufacture and install. It includes a distal support 401 fixedly connected to the fixed block 11, a proximal support 402 fixedly connected to the drone 20, and a sliding support 403 located between the distal support 401 and the proximal support 402. The sliding support 403 has the aforementioned side sliding groove 420 and corner sliding groove 430. This structure is fastened by screws or other means, making it easy to disassemble and maintain. In actual manufacturing, low-density, high-strength materials such as ABS engineering plastics and carbon fiber can be used.

[0072] The display unit 10 is located on the side of the drone 20; it also includes a battery 80 connected to the drone 20, with the battery 80 and the display unit 10 respectively located on opposite sides of the drone 20 to balance the forces on the drone.

[0073] The display unit 10 is a hollowed-out skeleton structure, and the display element 101 is provided on the body of the skeleton structure.

[0074] The fixed section, the side movable section, and the corner movable section can also utilize a mesh-like plate structure to provide sufficient strength and reduce wind resistance. (In...) Figure 9 In the illustrated embodiment, the fixed block, the side movable block, and the corner movable block can all be adopted. Figure 9 The continuous trapezoidal cross-section structure 109 is used to improve the resistance to deformation. The raised trapezoidal cross-section is replaced with a dovetail shape to become the slide rail part 19. The one on the fixed block becomes the fixed slide rail, and the one on the side movable block and the corner movable block becomes the movable slide rail. The dovetail slider 18 is fixed in the groove position of the continuous trapezoidal cross-section structure 19 by screws or the like. The one installed on the fixed block becomes the fixed slider, and the one installed on the side movable block and the corner movable block becomes the movable slider. The dovetail slider 18 has a dovetail groove 180 for embedding into the slide rail part 19. The dovetail groove 180 has balls 181 on both sides to reduce the friction during sliding. An electromagnet 182 and a roller bracket 183 are provided in the middle of the bottom of the dovetail groove 180. The roller bracket 183 has two rollers 185. Under the action of the spring force, the outer end of the iron core 184 of the electromagnet 182 always acts on the anti-slip toothed part 191 provided in the slide rail part 19. When sliding is needed, the electromagnet 182 is energized, retracting the iron core 184. The dovetail slider 18 and the slide rail 19 experience rolling friction from the balls 181 and rollers 185, resulting in low resistance. Under the power of the side push-pull mechanism and the corner push-pull mechanism, sliding between them can be achieved with relatively low power. When sliding is not needed, the electromagnet 182 is de-energized, and the outer end of the iron core 184 has a toothed portion. Under the action of the spring force, this toothed portion engages with the anti-slip toothed portion 191, achieving a static connection (i.e., fixed connection) between the dovetail slider 18 and the slide rail 19. The toothed portion and the anti-slip toothed portion preferably use triangular transverse teeth with an angle between 30 and 60 degrees. The continuous trapezoidal cross-section structure 109 has a through hole 108 at the groove position for the electromagnet 182 to pass through. The dovetail slider 18 is further provided with a stepped mounting groove 187 for clamping and fixing the electromagnet 182 and the roller bracket 183 between the dovetail slider 18 and the continuous trapezoidal cross-section structure 109. The roller bracket 183 is also provided with a rotating shaft 189 for mounting two rollers 185. The outer end of the iron core 184 is provided with an opening slot 188 for passing through the rotating shaft 189. Because the iron core 184 is usually circular, the opening slot 188 it provides can, under the guidance of the rotating shaft 189, keep the toothed part and the anti-slip toothed part 191 at its outer end parallel, achieving elastic engagement of the two when stationary. The electromagnet 182 is connected to the boundary drive circuit and synchronized with the working signals of the corner motor and the side motor. This structure is compact, easy to manufacture, install and maintain, and has low production cost.

[0075] like Figure 11As shown, the UAV 20 also includes a power supply circuit 31, a communication circuit 32, and a detection circuit 33 for detecting boundary gaps, all connected to the flight control circuit 30. The UAV 20 also includes a flight drive circuit 34 connected to the flight control circuit 30, several rotors 201, and rotor motors 202 driven by the rotors 201. The control information from the flight drive circuit 34 is used to control the rotor motors 202. The UAV 20 also includes a display drive circuit 35 connected to the flight control circuit 30. The display drive circuit 35 is connected to the display element 101 and sends display signals to the display element 101. The detection circuit can employ either common ultrasonic detection or infrared detection.

[0076] In other embodiments, a backup display unit located behind the matrix-distributed display units is also included; in the matrix-distributed display circuit, if any display unit fails, it is removed from the matrix distribution position and replaced by the backup display unit.

[0077] The control method of the aerial display control system of the present invention identifies a passive unit when the detection circuit on only one side of a display unit detects a distance smaller than the boundary gap. The adjacent display units on that side are identified as active units. The passive unit's side motors and corner motors, corresponding to that side or all four sides, start working in the same direction, causing the side and corner active blocks to move inward, increasing the boundary gap to a value greater than or equal to a set value. In other words, when a display unit becomes an active unit due to uncontrollable factors such as loss of control or wind speed, its adjacent display units are defined as passive units. The passive units actively adjust their outer contour dimensions to increase the boundary gap to a value greater than or equal to the set value, ensuring that interference between drones does not lead to loss of control or other consequences.

[0078] In other embodiments, such as Figure 10 and Figure 10A As shown, the gaps between the side movable blocks located on the four sides and the corner movable blocks located at the four corners are perpendicular to the outer contour of the display unit. This is beneficial for the distribution design of the display elements. Figure 1-8 In the embodiment shown, an angled design is used to make the area of ​​the corner active block and the side active block more even and the force more similar, so as to facilitate the use of side brackets and corner brackets of similar size.

[0079] In summary, the push-pull aerial display unit of this invention comprises a fixed block, a side movable block, and a corner movable block staggered front to back, as well as a side push-pull mechanism and a corner push-pull mechanism. The size of the display unit's boundary is adjusted using a staggered push-pull method, without interference between the blocks. When the boundary gap of the multi-UAV combined display of this invention is smaller than a set value, the side movable block and the corner movable block will begin to move, moving towards the rear and front sides of the fixed block respectively, to reduce the outer contour of the display unit, thereby ensuring a safe distance between the two display units and improving the reliability of the display when operating in the air. The side brackets and corner brackets formed a triangular support, constituting a stable support and improving the overall rigidity of the display unit. The use of a motor-driven lead screw structure to adjust the sliding seat has a good self-locking effect.

[0080] The above examples are merely illustrative of the technical content of the present invention to facilitate easier understanding by the reader, but do not imply that the implementation of the present invention is limited to these examples. Any technical extensions or re-creations made based on the present invention are protected by the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A push-pull aerial display unit, comprising a drone, a display unit, and a central support disposed between the display unit and the drone; the display unit is square, characterized in that, The display unit includes a fixed block located at the center, side movable blocks located on the four sides and rear of the fixed block, and corner movable blocks located at the four corners and front of the fixed block; the rear side of the fixed block is provided with a fixed slide rail for sliding connection with the side movable blocks, and a fixed slider for sliding connection with the corner movable blocks; the front side of the side movable blocks is provided with a movable slider that cooperates with the fixed slide rail; the rear side of the corner movable blocks is provided with a movable slide rail that cooperates with the fixed slider; it also includes a side push-pull mechanism disposed between the fixed block and the side movable blocks, and a corner push-pull mechanism disposed between the fixed block and the corner movable blocks.

2. The push-pull type air display unit according to claim 1, characterized in that: The side push-pull mechanism includes a side support located between the side wall of the middle section of the central support and the rear middle section of the side movable block; the side support includes a side connecting seat fixedly connected to the inner side of the side movable block, a side sliding seat slidably connected to the central support, and a side outer connecting rod and a side connecting rod hinged between the side connecting seat and the side sliding seat; one end of a side inner connecting rod is also hinged at the hinge joint of the side outer connecting rod and the side connecting rod, and the other end of the side inner connecting rod is hinged to the side of the front end of the central support or the center of the fixed block; The corner push-pull mechanism includes a corner bracket located between the side wall of the middle section of the central support and the middle section of the corner movable block; the corner bracket includes a corner connecting seat fixedly connected to the inner side of the corner movable block, a corner sliding seat slidably connected to the central support, and a corner outer connecting rod and a corner connecting rod hinged between the corner connecting seat and the corner sliding seat; one end of a corner inner connecting rod is also hinged at the hinge joint of the corner outer connecting rod and the corner connecting rod, and the other end of the corner inner connecting rod is hinged to the side of the front end of the central support or the center of the fixed block; The central support is provided with four corner sliding grooves to fit into the corner sliding seat, and four side sliding grooves to fit into the side sliding seat; The inner side of the side slide groove is also provided with a side lead screw that is connected to the side sliding seat in a transmission manner. One end of the side lead screw is connected to a side motor. The side motor drives the side lead screw to rotate, so as to drive the side sliding seat to move forward or backward, and then drive the side movable block to move inward or outward through the side connecting rod. The inner side of the corner slide groove is also provided with a corner screw that is connected to the corner sliding seat in a transmission. One end of the corner screw is connected to a corner motor. The corner motor drives the corner screw to rotate, so as to drive the corner sliding seat to move forward or backward, and then drive the corner movable block to move inward or outward through the corner connecting rod. When adjusting the boundary gap, the movement direction of the side active block is the same as that of the corner active block.

3. The push-pull type air display unit according to claim 2, characterized in that, The central support includes a distal support fixedly connected to the fixed block, a proximal support fixedly connected to the UAV, and a sliding support disposed between the distal support and the proximal support; the sliding support is provided with the side sliding groove and the corner sliding groove.

4. The push-pull type air display unit according to claim 3, characterized in that, The display unit is located on the side of the drone; it also includes a battery connected to the drone, with the battery and the display unit respectively located on opposite sides of the drone.

5. The push-pull type air display unit according to claim 4, characterized in that, The display unit is a hollowed-out skeleton structure, and the display element is provided on the skeleton body; the side motor and the corner motor constitute a boundary drive mechanism; The fixed block, side movable block, and corner movable block can all adopt a continuous trapezoidal cross-section structure to improve deformation resistance. One of the protruding trapezoidal cross-sections is replaced with a dovetail shape to become the slide rail. In the fixed block, this becomes the fixed slide rail, and in the side movable block and corner movable block, it becomes the movable slide rail. Dovetail sliders are fixed to the grooves in the continuous trapezoidal cross-section structure using screws or other means. In the fixed block, this becomes the fixed slider, and in the side movable block and corner movable block, it becomes the movable slider. The dovetail slider has a dovetail groove for embedding into the slide rail, and ball bearings are provided on both sides of the dovetail groove to reduce friction during sliding. Friction; an electromagnet and a roller bracket are located in the middle of the bottom of the dovetail groove, and the roller bracket has two rollers; under the action of the spring force, the outer end of the electromagnet's iron core always acts on the anti-slip toothed part of the slide rail; the continuous trapezoidal cross-section structure has a through hole in the groove position for the electromagnet to pass through; the dovetail slider also has a mounting stepped groove for clamping and fixing the electromagnet and the roller bracket between the dovetail slider and the continuous trapezoidal cross-section structure; the roller bracket also has a rotating shaft for mounting the two rollers; the outer end of the iron core has an opening slot for the rotating shaft to pass through; the electromagnet is connected to the boundary drive circuit and synchronized with the working signals of the corner motor and the side motor.

6. A multi-drone combined display screen, characterized in that... The push-pull aerial display unit according to any one of claims 1-5 includes several matrix-distributed units; the display unit is provided with a boundary drive circuit that is communicatively connected to the flight control circuit of the UAV; when the boundary gap between adjacent display units is less than a set value, the boundary drive circuit outputs a control signal to the boundary drive mechanism to reduce the boundary position of the display unit so that the boundary gap is restored to a value greater than or equal to the set value.

7. The multi-UAV combined display screen according to claim 6, characterized in that, It also includes a backup display unit located behind the matrix-distributed display unit; in the matrix-distributed display circuit, if any display unit fails, it is removed from the matrix distribution position and replaced by the backup display unit.

8. The multi-UAV combined display screen according to claim 7, characterized in that... The UAV also includes a power supply circuit, a communication circuit, and a detection circuit for detecting boundary gaps, all connected to the flight control circuit.

9. The control method for the multi-UAV combined display screen as described in claim 8, characterized in that, When the detection circuit on only one side of a certain display unit detects a distance smaller than the boundary gap, it is identified as a passive unit, and the adjacent display unit on that side is identified as an active unit. The passive unit corresponds to the side motor and corner motor of that side or all four sides starting to work in the same direction, causing the side active block and corner active block to move inward to increase the boundary gap to a value greater than or equal to the set value.

10. The control method according to claim 9, characterized in that, The UAV is also equipped with a flight drive circuit connected to the flight control circuit, and has several rotors and rotor motors connected to the rotors. The control information of the flight drive circuit is used to control the rotor motors.

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