Unmanned aerial vehicle advertising device

Abstract

The invention relates to the technical field of advertisement display devices, and discloses an unmanned aerial vehicle advertisement putting device which comprises a fuselage, a position adjusting mechanism and a display screen, the first end of the position adjusting mechanism is connected to the bottom of the fuselage, and the second end of the position adjusting mechanism is connected with the display screen. The position adjusting mechanism is arranged to be capable of adjusting the positions of the display screen in the horizontal direction and the vertical direction so that the display screen can display the advertisement content towards the display area, and the display area is arranged to be located in the space vertically below the machine body. When the unmanned aerial vehicle is started, takes off and hovers to a specified position (namely a position where target audiences below the vehicle body can see by raising heads), the position of the display screen can be adjusted in the horizontal direction and the vertical direction through the arranged position adjusting mechanism; therefore, the display screen can play pre-loaded or real-time transmitted advertisement content towards the target audience at the optimal angle and position.

Description

Technical Field

[0001] The present disclosure relates to the technical field of advertising display devices, and in particular, to an advertising device dropped by a drone. Background Art

[0002] With the acceleration of the urbanization process and the increasing frequency of commercial activities, traditional advertising delivery methods such as outdoor billboards and light box advertisements can no longer meet the requirements of the modern advertising market for flexibility, precision, and interactivity. In recent years, the development of drone technology has brought new opportunities to the advertising industry. By mounting a display screen on a drone and taking advantage of its flexible and maneuverable characteristics, dynamic advertising displays can be carried out in various occasions (such as large-scale gatherings, sports events, concerts, etc.), greatly enhancing the advertising dissemination effect and coverage.

[0003] Currently, existing advertising delivery methods include traditional advertising delivery methods and early drone advertising applications. Traditional advertising delivery methods include fixed-position billboards and mobile vehicle advertisements. Among them, the disadvantages of fixed-position billboards are: although the cost is low and it is easy to maintain, its geographical location is fixed and it is impossible to flexibly adjust the display location according to actual needs. The disadvantages of mobile vehicle advertisements are: although the position can be changed to a certain extent, limited by road conditions, it cannot enter certain specific areas, and the display effect is greatly affected by weather and traffic conditions.

[0004] Early drone advertising applications include simply hanging banners and single-screen display devices. Among them, the disadvantages of simply hanging banners are: some early attempts to hang advertising content under the drone, but due to the influence of factors such as wind, the advertising display effect of this form is poor and there are safety hazards. The disadvantages of single-screen display devices are: some drones began to attempt to carry a single display screen for advertising display, but these systems usually lack an accurate position adjustment mechanism, it is difficult to ensure that the advertising content is always facing the target audience, and the display effect is not good under different lighting conditions. Summary of the Invention

[0005] The purpose of the present disclosure is to provide an advertising device dropped by a drone to solve the technical problems existing in the related art.

[0006] To achieve the above purpose, the present disclosure provides an advertising device dropped by a drone, including a fuselage, a position adjustment mechanism, and a display screen; The first end of the position adjustment mechanism is connected to the bottom of the fuselage, and the second end of the position adjustment mechanism is connected to the display screen; When the drone takes off, the position adjustment mechanism is configured to be able to adjust the position of the display screen in the horizontal and vertical directions so that the display screen can display advertising content towards the display area; Wherein, the display area is set as a space located vertically below the fuselage.

[0007] Optionally, the adjusting mechanism includes a plurality of adjusting kinematic chains; The plurality of adjusting kinematic chains are arranged at intervals along the circumferential direction of the display screen. One end of each adjusting kinematic chain is movably connected to the bottom of the fuselage, and the other end of each adjusting kinematic chain is movably connected to the back of the display screen; The adjusting kinematic chain includes a first joint, a first telescopic rod, and a second joint; The first end of the first joint is hinged to the bottom of the fuselage. The first end of the first telescopic rod is hinged to the second end of the first joint. The second end of the first telescopic rod is hinged to the first end of the second joint. The second end of the second joint is hinged to the back of the display screen.

[0008] Optionally, the drone advertising device further includes two oppositely arranged first mounting seats and a first mounting shaft. The adjusting kinematic chain further includes two oppositely arranged first connecting seats, a first connecting shaft, two oppositely arranged second connecting seats, and a second connecting shaft. The display screen includes a display screen body, two oppositely arranged second mounting seats, and a second mounting shaft; The first joint is formed with a first through hole and a first through-bore of the first joint. The first through hole penetrates the first joint along the axial direction of the first joint. The first through-bore penetrates the first joint along the radial direction of the first joint, so that the first through-bore and the first through hole are arranged at a right angle; The two first mounting seats are arranged at the bottom of the fuselage. Each first mounting seat is formed with a first mounting hole. The first mounting shaft passes through the first through hole, and both ends of the first mounting shaft are rotatably connected to the corresponding first mounting holes respectively; The two first connecting seats are arranged at the first end of the first telescopic rod. Each first connecting seat is formed with a first connecting hole. The first connecting shaft passes through the first through-bore, and both ends of the first connecting shaft are rotatably connected to the corresponding first connecting holes respectively; The second joint is formed with a second through hole and a second through-bore of the second joint. The second through hole penetrates the second joint along the axial direction of the second joint. The second through-bore penetrates the second joint along the radial direction of the second joint, so that the second through-bore and the second through hole are arranged at a right angle; The two second mounting seats are arranged on the back of the display body, and each second mounting seat is formed with a second mounting hole. The second mounting shaft passes through the second through hole, and both ends of the second mounting shaft are rotatably connected to the corresponding second mounting holes respectively; The two second connecting seats are arranged at the second end of the second telescopic rod, and each second connecting seat is formed with a second connecting hole. The second connecting shaft passes through the second through hole, and both ends of the second connecting shaft are rotatably connected to the corresponding second connecting holes respectively.

[0009] Optionally, the adjustment kinematic chain further includes a first driving component, a second driving component, a third driving component, a fourth driving component and a fifth driving component; The first driving component is in transmission connection with the first joint to drive the first joint to rotate around its axis and change the included angle between the first joint and the fuselage; The second driving component is in transmission connection with the first connecting shaft to drive the first telescopic rod to rotate radially around the first joint and change the included angle between the first joint and the first telescopic rod; The third driving component is in transmission connection with the second connecting shaft to drive the first telescopic rod to rotate radially around the second joint and change the included angle between the second joint and the first telescopic rod; The fourth driving component is in transmission connection with the second joint to drive the second joint to rotate around its axis and change the included angle between the first joint and the display body; The fifth driving component is in transmission connection with the first telescopic rod to drive the first telescopic rod to extend or contract.

[0010] Optionally, the UAV advertising device further includes a telescopic mechanism; A receiving cavity is arranged in the fuselage; A receiving cavity for receiving the position adjusting mechanism and the display screen is formed on the fuselage. The receiving cavity is formed by the partial shell wall at the bottom of the fuselage recessed towards the top of the fuselage. The receiving cavity has an opposite open end and a closed end, and an opening communicating with the receiving cavity is formed on the closed end; The first end of the telescopic mechanism is connected in the receiving cavity, and the other end of the telescopic mechanism is hinged to the first end of the position adjusting mechanism. The telescopic mechanism can drive the position adjusting mechanism and the display screen to retract or extend out of the receiving cavity so that the position adjusting mechanism and the display screen can be switched between the working state and the closed state; Wherein, in the working state, the position adjusting mechanism and the display screen extend out of the receiving cavity and are located below the fuselage; in the closed state, the position adjusting mechanism and the display screen retract into the receiving cavity.

[0011] Optionally, the telescopic mechanism includes a plurality of telescopic components; Each telescopic component includes a second telescopic rod and a sixth driving component. The sixth driving component is located in the accommodating cavity. The second telescopic rod is vertically arranged. The first end of the second telescopic rod is in transmission connection with the sixth driving component. The sixth driving component can drive the second telescopic rod to extend or shorten. The second end of the second telescopic rod is hinged to the first end of the first joint; Wherein, the number of the telescopic components corresponds one-to-one to the number of the adjustment kinematic chains.

[0012] Optionally, the display screen includes a display screen body, and the display screen body includes a light sensing module, a frame, a substrate, a plurality of Micro LED chips, a driving circuit, a packaging material, a control chip, and an image processing unit; The substrate is installed on the frame. The substrate is used to support the plurality of Micro LED chips, the driving circuit, and the control chip. The plurality of Micro LED chips are arranged in an array; The packaging material covers one side of the plurality of Micro LED chips facing away from the substrate; The driving circuit includes a plurality of TFT backplanes and an IC controller. The input ends of the plurality of TFT backplanes are electrically connected to the IC controller. The output ends of the plurality of TFT backplanes are electrically connected to the corresponding Micro LED chips. Each TFT backplane is used to adjust the current flowing through the corresponding Micro LED chip; The light sensing module is used to detect the brightness of the working environment where the display screen body is located. The light sensing module includes multiple groups of light sensors symmetrically distributed on both sides of the frame. The display screen body divides the light sensing area through each group of light sensors; The light sensing module, the image processing unit, and the IC controller are all electrically connected to the control chip.

[0013] Optionally, the drone advertising device further includes a position sensor, an angle sensor, a camera, and a lidar; The position sensor and the angle sensor are both installed on the display screen; The position sensor is used to detect the relative position of the display screen with respect to the target audience in the display area; The angle sensor is used to detect the rotation angle of the display screen relative to the ground; Both the camera and the lidar are installed at the bottom of the fuselage; The camera is used to capture and collect the flow of people in the display area; The lidar is used to measure the distance between the fuselage and the target audience in the display area; The drone advertising device further includes a control system; The position sensor, the angle sensor, the camera, the lidar, the position adjustment mechanism, the telescopic mechanism, the display screen and the control system are all electrically connected.

[0014] Optionally, the drone advertising device further includes a footrest assembly; The footrest assemblies are respectively arranged on two opposite sides of the bottom of the fuselage; The footrest assembly includes a pressing block, a first spring, a first sliding rod, two sliders, two bases and two connecting rods arranged oppositely. The pressing block is arranged at the bottom of the fuselage. The two connecting rods are respectively hinged to both sides of the pressing block. The two sliders are respectively connected to one end of the connecting rod far away from the pressing block; Both ends of the sliding rod are movably connected to the two bases respectively. The two sliders are slidably matched on the first sliding rod. The first spring is sleeved on the first sliding rod. Both ends of the first spring are respectively connected to the two sliders.

[0015] Optionally, the base includes a housing, a second sliding rod and a second spring; A cavity is arranged inside the housing. A chute extending in the up-down direction and communicating with the cavity is arranged on the side wall of the cavity. The chute is used for the first sliding rod to pass through; A perforation extending in the up-down direction is formed on the first sliding rod. The second sliding rod is vertically arranged. The second sliding rod passes through the perforation. And both ends of the second sliding rod are respectively connected to the cavity wall of the cavity; The second spring is located inside the cavity and sleeved on the second sliding rod. The first end of the second spring is connected to the first sliding rod. The second end of the second spring is connected to the bottom wall of the cavity.

[0016] Through the above technical solution, when the drone starts, takes off and hovers at a specified position (i.e., a position where the target audience below the fuselage can look up and see), the position of the display screen can be adjusted in the horizontal and vertical directions through the provided position adjustment mechanism, so that the display screen can face the target audience at the best angle and position to play the pre-loaded or real-time transmitted advertisement content. The drone advertising device in the present disclosure can combine advanced flight control technology, precision mechanical design and multimedia display capabilities to achieve the function of flexibly displaying advertisements in the air.

[0017] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation section. Brief Description of the Drawings

[0018] The drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific implementation, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings: Figure 1 is a schematic structural diagram of a drone advertising device provided by an exemplary embodiment of the present disclosure, where the device is in a working state; Figure 2 is a schematic structural diagram of a drone advertising device provided by an exemplary embodiment of the present disclosure, where the device is in a closed state; Figure 3 is a sectional view of a drone advertising device provided by an exemplary embodiment of the present disclosure; Figure 4 is a schematic structural diagram of the connection between the position adjustment mechanism, the telescopic mechanism and the display screen of a drone advertising device provided by an exemplary embodiment of the present disclosure; Figure 5 is a schematic structural diagram of the connection between the position adjustment mechanism and the telescopic mechanism of a drone advertising device provided by an exemplary embodiment of the present disclosure; Figure 6 is a schematic structural diagram of the foot support assembly of a drone advertising device provided by an exemplary embodiment of the present disclosure; Figure 7 is a sectional view of the base of the foot support assembly of a drone advertising device provided by an exemplary embodiment of the present disclosure.

[0019] Description of the Reference Numerals 10. Body; 11. Accommodation cavity; 12. Receiving cavity; 13. Opening; 20. Position adjustment mechanism; 21. Adjustment motion chain; 211. First joint; 212. First telescopic rod; 213. Second joint; 214. First connection seat; 215. First connection shaft; 216. Second connection seat; 217. Second connection shaft; 30. Display screen; 31. Display screen body; 311. Light sensing module; 3111. Light sensor; 312. Frame; 32. Second mounting seat; 33. Second mounting shaft; 40. First mounting seat; 41. First mounting shaft; 50. Telescopic mechanism; 51. Telescopic assembly; 52. Second telescopic rod; 60. Position sensor; 61. Angle sensor; 62. Camera; 63. Lidar; 70. Foot support assembly; 71. Pressing block; 72. First spring; 73. First sliding rod; 74. Slide block; 75. Base; 751. Housing; 752. Second sliding rod; 753. Second spring; 754. Cavity; 755. Chute; 76. Connecting rod. Detailed implementation manners

[0020] The following will describe the detailed implementation manners of the present disclosure with reference to the accompanying drawings. It should be understood that the detailed implementation manners described herein are only for explaining and illustrating the present disclosure, and are not used to limit the present disclosure.

[0021] In the description of the present disclosure, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, specific orientation structure and operation, and therefore should not be construed as a limitation to the present disclosure. For example, referring to Figure 1 , Figure 1 the upper side in the drawing direction of Figure 1 is the "upper" side, Figure 1 the lower side in the drawing direction of

[0022] is the "lower" side, and "inside, outside" refers to the inside and outside of the corresponding structural contour. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions, and cannot be construed as indicating or implying relative importance.

[0023] As Figures 1 to 7As shown in the figure, the present disclosure provides an advertising device for a drone, which includes a fuselage 10, a position adjustment mechanism 20, and a display screen 30. The first end of the position adjustment mechanism 20 is connected to the bottom of the fuselage 10, and the second end of the position adjustment mechanism 20 is connected to the display screen 30. When the drone takes off, the position adjustment mechanism 20 is configured to be able to adjust the position of the display screen 30 in the horizontal and vertical directions, so that the display screen 30 can display advertising content towards the display area, where the display area is set to be the space directly below the fuselage 10.

[0024] Through the above technical solution, when the drone starts and takes off and hovers at a specified position (i.e., the position where the target audience below the fuselage 10 can look up and see), through the provided position adjustment mechanism 20, the position of the display screen 30 can be adjusted in the horizontal and vertical directions, so that the display screen 30 can play pre-loaded or real-time transmitted advertising content at the best angle and position facing the target audience. The advertising device for a drone in the present disclosure can achieve the function of flexibly displaying advertisements in the air by combining advanced flight control technology, precise mechanical design, and multimedia display capabilities.

[0025] As an implementation manner, as Figures 1 to 4 shown, the adjustment mechanism includes a plurality of adjustment kinematic chains 21. The plurality of adjustment kinematic chains 21 are arranged at intervals along the circumference of the display screen 30. One end of each adjustment kinematic chain 21 is movably connected to the bottom of the fuselage 10, and the other end of each adjustment kinematic chain 21 is movably connected to the back of the display screen 30. The adjustment kinematic chain 21 includes a first joint 211, a first telescopic rod 212, and a second joint 213. The first end of the first joint 211 is hinged to the bottom of the fuselage 10, the first end of the first telescopic rod 212 is hinged to the second end of the first joint 211, the second end of the first telescopic rod 212 is hinged to the first end of the second joint 213, and the second end of the second joint 213 is hinged to the back of the display screen 30.

[0026] Among them, by controlling the length of the first telescopic rod 212 and the angles of the first joint 211 and the second joint 213 in each adjustment kinematic chain 21, precise movement of the display screen 30 in the horizontal and vertical directions can be achieved. Designed in this way, the display screen 30 can be adjusted to the optimal display angle as needed, so that multi-dimensional display of the display screen 30 can be realized, and the display effect and display range of the display screen 30 can be improved. Moreover, since the adjustment kinematic chains 21 are arranged at intervals along the circumferential direction of the display screen 30 and each chain can be adjusted independently, such a setting can greatly improve the high adaptability and flexibility of the entire system, that is, the position and angle of the display screen 30 can be dynamically adjusted according to different environmental requirements or the requirements of advertising content. In addition, when multiple adjustment kinematic chains 21 work simultaneously, it can not only ensure the stability of the display screen 30 during the adjustment process, but also effectively disperse the load, reduce the burden on a single component, and improve the reliability and durability of the overall system.

[0027] In order to achieve multiple degrees of freedom among the first joint 211, the first telescopic rod 212, the second joint 213, and the display screen 30, as an implementation manner, as Figure 5As shown, the drone advertising device further includes two oppositely arranged first mounting seats 40 and a first mounting shaft 41. The adjustment motion chain 21 further includes two oppositely arranged first connecting seats 214, a first connecting shaft 215, two oppositely arranged second connecting seats 216, and a second connecting shaft 217. The display screen 30 includes a display screen body 31, two oppositely arranged second mounting seats 32, and a second mounting shaft 33. A first through hole and a first through-and-through hole of the first joint 211 are formed on the first joint 211. The first through hole penetrates the first joint 211 along the axial direction of the first joint 211, and the first through-and-through hole penetrates the first joint 211 along the radial direction of the first joint 211, so that the first through-and-through hole is arranged at a right angle to the first through hole. The two first mounting seats 40 are arranged at the bottom of the fuselage 10. A first mounting hole is formed on each first mounting seat 40. The first mounting shaft 41 is inserted through the first through hole, and both ends of the first mounting shaft 41 are rotatably connected to the corresponding first mounting holes. The two first connecting seats 214 are arranged at the first end of the first telescopic rod 212. A first connecting hole is formed on each first connecting seat 214. The first connecting shaft 215 is inserted through the first through-and-through hole, and both ends of the first connecting shaft 215 are rotatably connected to the corresponding first connecting holes. A second through hole and a second through-and-through hole of the second joint 213 are formed on the second joint 213. The second through hole penetrates the second joint 213 along the axial direction of the second joint 213, and the second through-and-through hole penetrates the second joint 213 along the radial direction of the second joint 213, so that the second through-and-through hole is arranged at a right angle to the second through hole. The two second mounting seats 32 are arranged on the back of the display screen body 31. A second mounting hole is formed on each second mounting seat 32. The second mounting shaft 33 is inserted through the second through hole, and both ends of the second mounting shaft 33 are rotatably connected to the corresponding second mounting holes. The two second connecting seats 216 are arranged at the second end of the second telescopic rod 52. A second connecting hole is formed on each second connecting seat 216. The second connecting shaft 217 is inserted through the second through-and-through hole, and both ends of the second connecting shaft 217 are rotatably connected to the corresponding second connecting holes.

[0028] Specifically, since the first joint 211 can insert the first mounting shaft 41 through the first through hole, and both ends of the first mounting shaft 41 are rotatably connected to the first mounting holes on the first mounting seats 40 at the bottom of the fuselage 10. Therefore, the first joint 211 can rotate 360° around the first mounting shaft 41, thereby providing a rotational degree of freedom (i.e., the first degree of freedom).

[0029] Since the first through-hole of the first joint 211 penetrates along the radial direction, the first connecting shaft 215 passes through this through-hole, and its two ends are respectively rotatably connected to the first connecting holes on the first connecting seat 214 at the end of the first telescopic rod 212. Therefore, the first telescopic rod 212 can swing relative to the first joint 211 on a plane, thereby providing a swinging degree of freedom (i.e., the second degree of freedom).

[0030] Since the first telescopic rod 212 itself has a telescopic function, its length changes. Therefore, by changing the length of the first telescopic rod 212, the position of the display screen 30 in the vertical or horizontal direction can be adjusted, thereby increasing a linear degree of freedom (i.e., the third degree of freedom).

[0031] Since the second joint 213 is connected to the second connecting seat 216 through the second connecting shaft 217, the second joint 213 can swing relative to the first telescopic rod 212, thereby providing a swinging degree of freedom (i.e., the fourth degree of freedom).

[0032] Since the second joint 213 can pass through the second through-hole to penetrate the second mounting shaft 33, and the two ends of the second mounting shaft 33 are rotatably connected to the second mounting holes on the second mounting seat 32 on the back of the display screen 30, the display screen 30 can rotate 360 degrees relative to the second joint 213, thereby providing a rotational degree of freedom (i.e., the fifth degree of freedom).

[0033] These degrees of freedom are combined together, enabling the display screen 30 to move flexibly in three-dimensional space. It can not only make precise position adjustments in the horizontal and vertical directions, but also rotate and tilt as needed to achieve the best display effect.

[0034] As an implementation manner, the adjustment motion chain 21 further includes a first driving component, a second driving component, a third driving component, a fourth driving component, and a fifth driving component. The first driving component is in transmission connection with the first joint 211 to drive the first joint 211 to rotate around its axis and change the included angle between the first joint 211 and the fuselage 10. The second driving component is in transmission connection with the first connecting shaft 215 to drive the first telescopic rod 212 to rotate around the radial direction of the first joint 211 and change the included angle between the first joint 211 and the first telescopic rod 212. The third driving component is in transmission connection with the second connecting shaft 217 to drive the first telescopic rod 212 to rotate around the radial direction of the second joint 213 and change the included angle between the second joint 213 and the first telescopic rod 212. The fourth driving component is in transmission connection with the second joint 213 to drive the second joint 213 to rotate around its axis and change the included angle between the first joint 211 and the display screen body 31. The fifth driving component is in transmission connection with the first telescopic rod 212 to drive the first telescopic rod 212 to extend or contract.

[0035] Among them, the first driving component can provide a rotational degree of freedom around the axis of the first joint 211 for adjusting the overall horizontal orientation of the display screen 30.

[0036] Among them, the second driving component and the third driving component can respectively provide a swinging degree of freedom around the radial directions of the first joint 211 and the second joint 213, so as to enhance the positioning accuracy of the display screen 30 in space.

[0037] Among them, the fourth driving component can provide a rotational degree of freedom around the axis of the second joint 213, enabling the display screen 30 to be rotated and adjusted to adapt to different viewing angles.

[0038] Among them, the fifth driving component can provide a linear degree of freedom, and by changing the length of the first telescopic rod 212, the position movement of the display screen 30 in three-dimensional space can be realized.

[0039] Each driving component can work independently or cooperate to achieve the optimal display effect.

[0040] As an implementation manner, as Figures 1 to 5 shown, the drone advertising device further includes a telescopic mechanism 50. A receiving cavity 11 is provided inside the fuselage 10. A receiving cavity 12 for receiving the position adjusting mechanism 20 and the display screen 30 is formed on the fuselage 10. The receiving cavity 12 is formed by a partial shell wall at the bottom of the fuselage 10 recessing towards the top of the fuselage 10. The receiving cavity 12 has an opposite open end and a closed end. An opening 13 communicating with the receiving cavity 11 is provided on the closed end. The first end of the telescopic mechanism 50 is connected inside the receiving cavity 11, and the other end of the telescopic mechanism 50 is hinged to the first end of the position adjusting mechanism 20. The telescopic mechanism 50 can drive the position adjusting mechanism 20 and the display screen 30 to retract or extend out of the receiving cavity 12, so as to switch the position adjusting mechanism 20 and the display screen 30 between the working state and the closed state. Among them, in the working state, the position adjusting mechanism 20 and the display screen 30 extend out of the receiving cavity 12 and are located below the fuselage 10; in the closed state, the position adjusting mechanism 20 and the display screen 30 retract into the receiving cavity 12.

[0041] As Figure 1 shown, when advertising needs to be displayed, the telescopic mechanism 50 can be activated and extended, driving the position adjusting mechanism 20 and the display screen 30 to move downward until they completely extend out of the receiving cavity 12. At this time, the position adjusting mechanism 20 can adjust the angle and position of the display screen 30 as needed to display the advertising content to the audience at the best viewing angle.

[0042] As Figure 2As shown in the figure, when the advertisement display is completed or when there is no need to display the advertisement, the telescopic mechanism 50 starts to contract, and the position adjustment mechanism 20 and the display screen 30 can be retracted into the receiving cavity 12. The advantage of this is that it can protect the display screen 30 from the influence of the external environment, such as weather conditions like wind and rain, and at the same time reduce the air resistance during the flight of the drone, which helps to improve the flight efficiency and stability.

[0043] As an implementation method, as Figure 5 shown in the figure, the telescopic mechanism 50 includes a plurality of telescopic components 51. Each telescopic component 51 includes a second telescopic rod 52 and a sixth driving component. The sixth driving component is located in the accommodation cavity 11. The second telescopic rod 52 is vertically arranged. The first end of the second telescopic rod 52 is in transmission connection with the sixth driving component. The sixth driving component can drive the second telescopic rod 52 to extend or shorten. The second end of the second telescopic rod 52 is hinged to the first end of the first joint 211. Among them, the number of telescopic components 51 corresponds one-to-one with the number of adjustment motion chains 21.

[0044] Among them, through the precise control of the second telescopic rod 52 by the sixth driving component, very fine position adjustment can be achieved, so that the display screen 30 can accurately reach the predetermined position at any time.

[0045] Among them, each adjustment motion chain 21 has a corresponding telescopic component 51. Such a design can improve the reliability and stability of the system and reduce the risk of overall failure caused by single-point failures.

[0046] As Figure 1 shown in the figure, when it is necessary to enter the working state, the sixth driving component is activated to drive the second telescopic rod 52 to extend. Since the second end of the second telescopic rod 52 is hinged to the first end of the first joint 211, as the second telescopic rod 52 extends, the position adjustment mechanism 20 and the display screen 30 are gradually pushed out of the receiving cavity 12 until they are fully deployed and in place.

[0047] As Figure 2 shown in the figure, after the advertisement display is completed or when preparing to fly, the sixth driving component operates in reverse to shorten the second telescopic rod 52. At this time, the position adjustment mechanism 20 and the display screen 30 are slowly retracted into the receiving cavity 12 under the action of the telescopic component 51 until they are completely received.

[0048] As an implementation method, as Figure 4As shown in the figure, the display screen 30 includes a display screen body 31. The display screen body 31 includes a light sensing module 311, a frame 312, a substrate, a plurality of Micro LED chips, a driving circuit, a packaging material, a control chip, and an image processing unit. The substrate is mounted on the frame 312 and is used to support the plurality of Micro LED chips, the driving circuit, and the control chip. The plurality of Micro LED chips are arranged in an array. The packaging material covers the side of the plurality of Micro LED chips facing away from the substrate. The driving circuit includes a plurality of TFT backplanes and an IC controller. The input ends of the plurality of TFT backplanes are electrically connected to the IC controller, and the output ends of the plurality of TFT backplanes are electrically connected to the corresponding Micro LED chips. Each TFT backplane is used to adjust the current flowing through the corresponding Micro LED chip. The light sensing module 311 is used to detect the brightness of the working environment where the display screen body 31 is located. The light sensing module 311 includes multiple groups of light sensors 3111, and the light sensors 3111 symmetrically distributed on both sides of the frame 312. The display screen body 31 divides the light sensing area through each group of light sensors 3111. The light sensing module 311, the image processing unit, and the IC controller are all electrically connected to the control chip.

[0049] Among them, the frame 312 serves as the physical support structure of the display screen 30. The frame 312 can not only provide installation positions for various components of the display screen 30, but also protect the internal electronic components from the influence of the external environment.

[0050] Among them, the Micro LED chips have the characteristics of high brightness, high contrast, fast response time, and low energy consumption. Each Micro LED chip is a micron-level LED that can emit red, green, or blue light and directly generate an image as an independent light-emitting pixel (without an additional backlight). These Micro LED chips are arranged in an array on the substrate to form a complete display panel.

[0051] Among them, the packaging material covers the Micro LED chips and can play a protective role while improving the stability of the overall structure. In addition, the packaging material can also help optimize the light output efficiency.

[0052] Among them, the IC controller is responsible for managing and coordinating the operations of all TFT backplanes, so that each Micro LED chip can receive the correct driving signal.

[0053] Among them, the control chip can be responsible for processing the data from the image processing unit and converting it into a format suitable for the driving circuit. And the control chip can also manage the communication with devices such as the light sensing module 311.

[0054] Among them, the image processing unit can be responsible for receiving the original image data and performing necessary processing, such as color correction, contrast adjustment, etc., to optimize the final display effect.

[0055] Regarding image optimization, after receiving the image data from the content source, the image processing unit can perform optimization processing on it and then transfer it to the control chip. The control chip then converts the optimized data into driving signals to precisely control the state of each Micro LED chip through the TFT backplane, thereby presenting a high-quality picture.

[0056] Optionally, the content source can be local storage (such as the internal storage device of a drone), can be a remote server (transmitted through a wireless network), or can also be real-time generated content (such as a live stream). The present disclosure does not limit this.

[0057] Regarding the dynamic adjustment of partition brightness, there are two adjustment implementation methods. The first adjustment implementation method can perform partitioning according to the distribution of the light sensing module 311. The second adjustment implementation method can perform partitioning according to the content characteristics of different parts of the screen, such as areas with large bright-dark changes in video content.

[0058] In the first adjustment implementation method, multiple groups of light sensors 3111 distributed on both sides of the frame 312 can be used to detect the ambient brightness of different areas around the display screen 30 in real time. That is, according to the positions of the light sensors 3111, the display screen 30 can be divided into multiple independent light sensing areas (such as upper left, upper right, lower left, lower right, etc.). In this way, each group of light sensors 3111 can be responsible for data acquisition in one area. First, the control chip can obtain the ambient brightness data of each area from the light sensing module 311. Then, the image processing unit combines the ambient brightness data to optimize the display content of each area. For example, increasing the contrast in a high-brightness environment and reducing the brightness in a low-brightness environment to save energy consumption and reduce visual fatigue. Finally, the IC controller is responsible for distributing the instructions of the control chip to each TFT backplane so that the brightness adjustment of each area can be precisely executed.

[0059] The application scenario of the first adjustment implementation method can be that in outdoor advertising, the ambient light may change due to time, weather, or geographical location. For example, when the sun shines directly during the day, higher brightness may be required in some areas to remain clearly visible. In the evening or on a cloudy day, the brightness requirement decreases, and the system can automatically dim the relevant areas to save energy. The application scenario of the first adjustment implementation method can also be that if one side of the display screen 30 is blocked by a building or other objects, resulting in a lower ambient brightness in that area, the system can automatically reduce the brightness of that area to avoid an obvious brightness difference from other areas.

[0060] In the second adjustment implementation, first, the resolution and zoning strategy of the display screen 30 can be determined. For example, the screen can be divided into multiple small blocks (such as 8x8 or more), and each block serves as an independent brightness control area. The image processing unit can receive the input video data and analyze each frame of the image using content-aware algorithms (or techniques such as edge detection and color analysis) to identify content areas with different brightness levels. For example, it is recognized that the sky part is brighter and the ground part is darker. Then, according to the content analysis results, a corresponding brightness mapping table is generated, indicating the brightness values that each Micro LED should emit. For example, the Micro LEDs in the sky part have a higher brightness, and the Micro LEDs in the ground part have a lower brightness. Next, the IC controller converts the brightness mapping table into a signal format suitable for use by the TFT backplane and controls the current of each Micro LED through the TFT backplane. Finally, according to the feedback of the ambient light sensor 3111, the brightness of each Micro LED can be dynamically adjusted to provide an optimal viewing experience. For example, the overall brightness is increased under direct sunlight, and the brightness is reduced at night to save power.

[0061] An application scenario of the second adjustment implementation can be that a certain product in an advertisement is located in the upper right corner of the display screen 30, and the system can dynamically increase the brightness of this area to attract the attention of the audience.

[0062] In the present disclosure, the display screen 30 can utilize the advantages of Micro LED technology, combined with intelligent brightness adjustment and image optimization algorithms, so that the display screen 30 can perform excellently in various environments. At the same time, through modular design, each component is both independent and collaborative, and can jointly form an efficient and reliable display system.

[0063] As an implementation, as Figure 1 、 Figure 2 and Figure 4 shown, the drone advertising device further includes a position sensor 60 and an angle sensor 61. Both the position sensor 60 and the angle sensor 61 are installed on the display screen 30. The position sensor 60 is used to detect the relative position of the display screen 30 with respect to the target audience in the display area, and the angle sensor 61 is used to detect the rotation angle of the display screen 30 with respect to the ground.

[0064] Regarding the adjustment of the position of the display screen 30, specifically, when the drone is flying or hovering, the position sensor 60 starts to work, which can monitor the position change of the display screen 30 relative to the target audience in real time and transmit the data to the control system. At the same time, the angle sensor 61 can detect the rotation angle of the display screen 30 relative to the ground and send this information to the control system. In this way, the control system can analyze the received position and angle data, so as to determine whether the display screen 30 needs to adjust its position or attitude to achieve the best display effect. Based on the analysis results, the control system can decide how to adjust the actions of the position adjustment mechanism 20 and the telescopic mechanism 50, and whether it is necessary to change the angle of the display screen 30.

[0065] To further enhance the function of the drone advertising device, so that it can not only accurately display the advertising content, but also analyze the situation of the display area in real time and make corresponding adjustments. Optionally, the drone advertising device further includes a camera 62 and a lidar 63. Both the camera 62 and the lidar 63 are installed at the bottom of the fuselage 10. The camera 62 is used to capture and collect the flow of people in the display area, and the lidar 63 is used to measure the distance between the fuselage 10 and the target audience in the display area.

[0066] To achieve the intelligent scheduling and precise control of the entire device, as an implementation, as Figures 1 to 7 shown, the drone advertising device further includes a control system. The position sensor 60, the angle sensor 61, the position adjustment mechanism 20, the telescopic mechanism 50, and the display screen 30 are all electrically connected to the control system.

[0067] Specifically, when the drone flies above the display area, the camera 62 starts to work, captures the flow of people below in real time, and transmits this image data to the control system described below. At the same time, the lidar 63 is activated, scans the display area, accurately measures the distance between the drone and the ground target audience, and feeds back this distance data to the control system. Then, the control system can analyze the received image data, and use computer vision technology to identify the characteristics of the flow of people such as crowd gathering points and moving directions. Combining with the distance data provided by the lidar 63, the control system can more accurately judge the position relationship between the drone and the display area. Based on the above analysis results, the control system decides whether it is necessary to adjust the height and position of the drone, as well as the angle and brightness of the display screen 30 to optimize the advertising display effect.

[0068] That is to say, according to the data provided by the camera 62 and the lidar 63, the control system can send instructions to the position adjustment mechanism 20 to adjust the angle and position of the display screen 30 so that it faces the crowded area.

[0069] The distance data measured by the lidar 63 can be utilized, and the control system can finely adjust the flight altitude of the drone to ensure the best viewing angle and viewing experience.

[0070] Combined with the data of the light sensing module 311, the control system can also independently adjust the brightness of different areas of the display screen 30 to meet the display requirements under different lighting conditions.

[0071] As an implementation manner, as Figure 1 and Figure 6 shown, the drone advertising device further includes a foot support assembly 70. The foot support assembly 70 is respectively arranged on the opposite sides of the bottom of the fuselage 10. The foot support assembly 70 includes a pressing block 71, a first spring 72, a first sliding rod 73, two sliders 74, two bases 75, and two connecting rods 76 arranged oppositely. The pressing block 71 is arranged at the bottom of the fuselage 10. The two connecting rods 76 are respectively hinged to both sides of the pressing block 71. The two sliders 74 are respectively connected to the ends of the connecting rods 76 far from the pressing block 71. The two ends of the sliding rod are respectively movably connected to the two bases 75. The two sliders 74 are slidably matched on the first sliding rod 73. The first spring 72 is sleeved on the first sliding rod 73, and the two ends of the first spring 72 are respectively connected to the two sliders 74.

[0072] Specifically, before the drone is about to land, the foot support assembly 70 is in a natural state, that is, the connecting rod 76 is slightly unfolded but does not completely touch the ground, and the first spring 72 is in a relaxed or slightly compressed state. When the drone approaches the ground and starts to touch the ground, the connecting rod 76 touches the ground first. At this time, due to the reaction force of the ground, the slider 74 starts to slide inward along the first sliding rod 73. As the slider 74 slides, the first spring 72 is in a compressed state, absorbing the impact force generated during landing, which can reduce the vibration impact on the drone body. At the same time, the angle of the connecting rod 76 can also be adjusted according to the actual height of the ground, so that the drone can stand stably. When the drone stops completely, the foot support assembly 70 maintains a certain supporting state through the elastic restoring force of the first spring 72, which can prevent the drone from tipping due to small disturbances.

[0073] Among them, the design of the first spring 72 can effectively absorb the impact force during landing, reduce the impact on the internal electronic components of the drone, and extend the service life of the device.

[0074] As an implementation manner, as Figure 7As shown in the figure, the base 75 includes a housing 751, a second sliding rod 752, and a second spring 753. The interior of the housing 751 is provided with a cavity 754. A chute 755 extending in the up and down direction and communicating with the cavity 754 is provided on the side wall of the cavity 754. The chute 755 is used for the first sliding rod 73 to pass through. A through hole extending in the up and down direction is formed on the first sliding rod 73. The second sliding rod 752 is vertically arranged and passes through the through hole. Moreover, both ends of the second sliding rod 752 are respectively connected to the wall of the cavity 754. The second spring 753 is located in the cavity 754 and sleeved on the second sliding rod 752. The first end of the second spring 753 is connected to the first sliding rod 73, and the second end of the second spring 753 is connected to the bottom wall of the cavity 754.

[0075] Specifically, before the drone is about to land, the footrest assembly 70 is in a natural state. The first sliding rod 73 is located at a certain position in the chute 755, and the second spring 753 is in a relaxed or slightly compressed state. When the drone approaches the ground and starts to contact the ground, the connecting rod 76 touches the ground first. At this time, due to the reaction force of the ground, the first sliding rod 73 starts to move downward along the chute 755. As the first sliding rod 73 moves downward, the second spring 753 is compressed, absorbing part of the impact force. At the same time, the through hole on the first sliding rod 73 allows it to slide freely on the second sliding rod 752, enabling the first sliding rod 73 to move smoothly. When the drone comes to a complete stop, the second spring 753 pushes the first sliding rod 73 back to its original position through its elastic restoring force, maintaining a certain supporting state to prevent the drone from tipping over due to minor disturbances.

[0076] The first spring 72 can play a buffering role between the sliders 74, enabling the connecting rod 76 to have appropriate buffering and restoring forces during the deployment and retraction processes. The second spring 753 provides additional buffering support when the first sliding rod 73 moves, further reducing the impact force during landing. The combination of the first spring 72 and the second spring 753 can provide two layers of buffering protection, significantly enhancing the buffering capacity of the footrest assembly 70, effectively reducing the impact force during landing, and further protecting the internal components of the drone.

[0077] The preferred embodiments of the present disclosure have been described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0078] In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination methods.

[0079] In addition, any combination can be made among various different embodiments of the present disclosure, as long as it does not violate the idea of the present disclosure, and it should equally be regarded as the content disclosed by the present disclosure.

Claims

1. A drone advertising device, characterized in that: It comprises a body (10), a position adjustment mechanism (20) and a display screen (30); A first end of the position adjustment mechanism (20) is connected to the bottom of the body (10), and a second end of the position adjustment mechanism (20) is connected to the display screen (30); When the drone takes off, the position adjustment mechanism (20) is configured to be able to adjust the position of the display screen (30) in the horizontal direction and the vertical direction, so that the display screen (30) can display advertising content toward the display area; Wherein, the display area is configured as a space located vertically below the fuselage (10).

2. The drone advertising device according to claim 1, characterized in that: The position adjustment mechanism comprises a plurality of adjustment kinematic chains (21); A plurality of the adjustment kinematic chains (21) are arranged at intervals along the circumference of the display screen (30), one end of each of the adjustment kinematic chains (21) is movably connected to the bottom of the fuselage (10), and the other end of each of the adjustment kinematic chains (21) is movably connected to the back of the display screen (30); The adjustment kinematic chain (21) comprises a first joint (211), a first telescopic rod (212) and a second joint (213); The first end of the first joint (211) is hinged to the bottom of the body (10), the first end of the first telescopic rod (212) is hinged to the second end of the first joint (211), the second end of the first telescopic rod (212) is hinged to the first end of the second joint (213), and the second end of the second joint (213) is hinged to the back of the display screen (30).

3. The drone advertising device according to claim 2, characterized in that: The drone advertising device further comprises two first mounting seats (40) and a first mounting shaft (41) arranged opposite to each other; the adjustment kinematic chain (21) further comprises two first connecting seats (214) arranged opposite to each other, a first connecting shaft (215), two second connecting seats (216) arranged opposite to each other, and a second connecting shaft (217); the display screen (30) comprises a display screen body (31), two second mounting seats (32) and a second mounting shaft (33) arranged opposite to each other; A first through hole and a first through hole of the first joint (211) are formed on the first joint (211), the first through hole penetrating the first joint (211) along the axial direction of the first joint (211), and the first through hole penetrating the first joint (211) along the radial direction of the first joint (211), so that the first through hole is arranged at a vertical angle to the first through hole; Two first mounting seats (40) are arranged at the bottom of the body (10), each of the first mounting seats (40) is formed with a first mounting hole, the first mounting shaft (41) is passed through the first through hole, and both ends of the first mounting shaft (41) are rotatably connected to the corresponding first mounting holes; Two first connection seats (214) are arranged at the first end of the first telescopic rod (212), each of the first connection seats (214) is formed with a first connection hole, the first connection shaft (215) is passed through the first through hole, and both ends of the first connection shaft (215) are rotatably connected to the corresponding first connection holes; A second through hole and a second through hole of the second joint (213) are formed on the second joint (213), the second through hole penetrating the second joint (213) along the axial direction of the second joint (213), and the second through hole penetrating the second joint (213) along the radial direction of the second joint (213), so that the second through hole is arranged at a vertical angle to the second through hole; Two second mounting seats (32) are arranged on the back of the display screen body (31), each second mounting seat (32) is formed with a second mounting hole, the second mounting shaft (33) is passed through the second through hole, and both ends of the second mounting shaft (33) are rotatably connected to the corresponding second mounting holes; Two second connecting seats (216) are arranged at the second end of the second telescopic rod (52), and each of the second connecting seats (216) is formed with a second connecting hole. The second connecting shaft (217) is passed through the second through hole, and the two ends of the second connecting shaft (217) are respectively rotatably connected to the corresponding second connecting holes.

4. The drone advertising device according to claim 3, characterized in that: The adjustment kinematic chain (21) further comprises a first drive component, a second drive component, a third drive component, a fourth drive component and a fifth drive component; The first driving component is in transmission connection with the first joint (211) so as to drive the first joint (211) to rotate around its axis and change the angle between the first joint (211) and the fuselage (10); The second driving component is drivingly connected to the first connecting shaft (215) to drive the first telescopic rod (212) to rotate radially around the first joint (211) and to change the angle between the first joint (211) and the first telescopic rod (212); The third driving component is drivingly connected to the second connecting shaft (217) to drive the first telescopic rod (212) to rotate radially around the second joint (213) and to change the angle between the second joint (213) and the first telescopic rod (212); The fourth driving component is in transmission connection with the second joint (213) so as to drive the second joint (213) to rotate around its axis and change the angle between the first joint (211) and the display screen body (31); The fifth driving component is in transmission connection with the first telescopic rod (212) to drive the first telescopic rod (212) to extend or shorten.

5. The drone advertising device according to any one of claims 1 to 4, characterized in that: The drone advertising device further comprises a telescopic mechanism (50); A receiving chamber (11) is provided in the body (10); The body (10) is provided with a receiving cavity (12) for receiving the position adjustment mechanism (20) and the display screen (30); the receiving cavity (12) is formed by a portion of the shell wall at the bottom of the body (10) being recessed in a direction close to the top of the body (10); the receiving cavity (12) has an open end and a closed end opposite to each other; the closed end is provided with an opening (13) communicating with the receiving cavity (11); The first end of the telescopic mechanism (50) is connected to the accommodating cavity (11), and the other end of the telescopic mechanism (50) is hinged to the first end of the position adjustment mechanism (20), and the telescopic mechanism (50) can drive the position adjustment mechanism (20) and the display screen (30) to retract or extend into the accommodating cavity (12), so as to switch the position adjustment mechanism (20) and the display screen (30) between a working state and a closed state; Wherein, in the working state, the position adjustment mechanism (20) and the display screen (30) extend out of the receiving cavity (12) and are located below the body (10); in the closed state, the position adjustment mechanism (20) and the display screen (30) are retracted into the receiving cavity (12).

6. The drone advertising device according to claim 5, characterized in that: The telescopic mechanism (50) comprises a plurality of telescopic components (51); Each of the telescopic assemblies (51) comprises a second telescopic rod (52) and a sixth driving component, the sixth driving component being located in the accommodating cavity (11), the second telescopic rod (52) being arranged vertically, the first end of the second telescopic rod (52) being transmission-connected to the sixth driving component, the sixth driving component being capable of driving the second telescopic rod (52) to extend or shorten, and the second end of the second telescopic rod (52) being hinged to the first end of the first joint (211); The number of the telescopic components (51) corresponds one-to-one to the number of the adjustment kinematic chains (21).

7. The drone advertising device according to claim 5, characterized in that: The display screen (30) comprises a display screen body (31), wherein the display screen body (31) comprises a light sensing module (311), a frame (312), a substrate, a plurality of Micro LED chips, a driving circuit, a packaging material, a control chip, and an image processing unit; The substrate is mounted on the frame (312), and the substrate is used to support the plurality of Micro LED chips, the driving circuit and the control chip, and the plurality of Micro LED chips are arranged in an array; The packaging material is covered on a side of the plurality of Micro LED chips away from the substrate; The driving circuit includes a plurality of TFT backplanes and an IC controller, wherein the input ends of the plurality of TFT backplanes are electrically connected to the IC controller, and the output ends of the plurality of TFT backplanes are electrically connected to the corresponding Micro LED chips, and each TFT backplane is used to adjust the current flowing through the corresponding Micro LED chip; The light sensing module (311) is used to detect the brightness of the working environment where the display screen body (31) is located, and the light sensing module (311) comprises a plurality of groups of light sensors (3111) symmetrically distributed on both sides of the frame (312), and the display screen body (311) is divided into light sensing areas by each group of light sensors (3111); The light sensing module (311), the image processing unit and the IC controller are all electrically connected to the control chip.

8. The drone advertising device according to claim 7, characterized in that: The drone advertising device also includes a position sensor (60), an angle sensor (61), a camera (62) and a laser radar (63); The position sensor (60) and the angle sensor (61) are both mounted on the display screen (30); The position sensor (60) is used to detect the relative position of the display screen (30) relative to the target audience in the display area; The angle sensor (61) is used to detect the rotation angle of the display screen (30) relative to the ground; The camera (62) and the laser radar (63) are both installed at the bottom of the fuselage (10); The camera (62) is used to capture and collect information about the flow of people in the display area; The laser radar (63) is used to measure the distance between the fuselage (10) and the target audience in the display area; The drone advertising device also includes a control system; The position sensor (60), the angle sensor (61), the camera (62), the laser radar (63), the position adjustment mechanism (20), the telescopic mechanism (50), the display screen (30), and the control system are all electrically connected.

9. The drone advertising device according to claim 1, characterized in that: The drone advertising device further comprises a foot support assembly (70); The foot support assemblies (70) are respectively arranged on two opposite sides of the bottom of the fuselage (10); The foot support assembly (70) comprises a pressure block (71), a first spring (72), a first sliding rod (73), two sliders (74), two bases (75) and two connecting rods (76) arranged opposite to each other, wherein the pressure block (71) is arranged at the bottom of the fuselage (10), the two connecting rods (76) are respectively hinged to two sides of the pressure block (71), and the two sliders (74) are respectively connected to one end of the connecting rod (76) away from the pressure block (71); The two ends of the slide bar are movably connected to the two bases (75), the two slide blocks (74) are slidably fitted on the first slide bar (73), the first spring (72) is sleeved on the first slide bar (73), and the two ends of the first spring (72) are connected to the two slide blocks (74).

10. The drone advertising device according to claim 9, characterized in that: The base (75) comprises a housing (751), a second sliding rod (752) and a second spring (753); A cavity (754) is provided inside the housing (751), and a slide groove (755) extending in the up-down direction and communicating with the cavity (754) is provided on a side wall of the cavity (754), and the slide groove (755) is used for the first slide rod (73) to pass through; The first slide bar (73) is formed with a through hole extending in the up-down direction, the second slide bar (752) is vertically arranged, the second slide bar (752) is inserted into the through hole, and both ends of the second slide bar (752) are respectively connected to the cavity wall of the cavity (754); The second spring (753) is located in the cavity (754) and is sleeved on the second sliding rod (752); the first end of the second spring (753) is connected to the first sliding rod (73); and the second end of the second spring (753) is connected to the bottom wall of the cavity (754).

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