Public safety support multi-rotor intelligent camera unmanned aerial vehicle with expandable module

Abstract

The application relates to the technical field of unmanned planes, and discloses a multi-rotor intelligent camera unmanned plane with a public safety support expandable module, which comprises a shell mechanism, a back-pulling mechanism is fixedly installed in the middle part of the shell mechanism, a locking mechanism is fixedly installed at the upper end of the shell mechanism, rotors are uniformly distributed on the periphery of the shell mechanism, a control main body is fixedly installed at the upper end of the shell mechanism, a camera module is fixedly installed at the lower end of the shell mechanism, and buckles II are uniformly distributed at the upper end of the camera module. Through cooperation of the back-pulling mechanism and the rotor, all rotating arms can be pulled out at the same time, and telescopic arms can be synchronously extended from the inside of the rotating arms, so that the unfolding action of the unmanned plane is simplified; and through cooperation of the back-pulling mechanism and the locking mechanism, the position of the rotor mechanism can be locked after rotation is completed, so that the unmanned plane is more convenient to use and store.

Description

Technical Field

[0001] This invention relates to the field of unmanned aerial vehicle (UAV) technology, and more particularly to a multi-rotor intelligent camera UAV with expandable modules for public safety support. Background Technology

[0002] Drones designed for public safety are typically equipped with high-definition intelligent camera systems, possessing core flight capabilities such as stable hovering, rapid cruise, and autonomous obstacle avoidance. They enable wide-area aerial reconnaissance, real-time transmission of high-definition images, and data storage. The equipment features standardized, expandable interfaces, allowing for flexible integration with dedicated functional modules such as lighting, loudspeaker systems, emergency delivery systems, and environmental monitoring, perfectly adapting to public safety scenarios including security patrols, traffic control, emergency rescue, and disaster reconnaissance. Their ease of operation and reliable battery life significantly improve the response speed and efficiency of public safety incidents, providing efficient aerial technical support for urban public safety prevention and control systems.

[0003] Because these types of drones need to carry multiple functions and are relatively large, they adopt foldable rotor drones. However, existing drones with foldable rotors have a low safety factor and weak folding function, resulting in the propellers being too close together after the rotors rotate, leading to poor stability. To solve this problem, a folding mechanism for unmanned aerial vehicle propellers disclosed in publication number CN118387336B uses a two-stage folding arm and a rotating arm for the propeller arms, which can effectively improve the folding and retraction effect of the drone. It achieves complete retraction and extension of the propeller arms while ensuring structural stability. However, when folding in the first stage, all wings open simultaneously, while when opening in the second stage, they open individually and require individual locking. In addition, it does not have a one-button storage function, making it inconvenient to use and unable to meet the requirements of rapid response for public safety. Summary of the Invention

[0004] In view of the problems existing in the prior art, the purpose of this invention is to provide a multi-rotor intelligent camera drone with expandable modules for public safety support, so as to solve the problems mentioned in the background art.

[0005] To solve the above problems, the present invention adopts the following technical solution: a multi-rotor intelligent camera drone with expandable modules for public safety, including a shell mechanism. A pull-back mechanism is fixedly installed in the middle of the shell mechanism, and a locking mechanism is fixedly installed in the upper inner part of the shell mechanism. Rotor mechanisms are evenly distributed on the outer periphery of the shell mechanism. A control body is fixedly installed in the upper part of the shell mechanism, and a camera module is fixedly installed in the lower part of the shell mechanism. Buckles are evenly distributed on the upper part of the camera module. The pull-back mechanism includes a rotating plate and a fixed ring. Arc-shaped rods are evenly distributed on the outer periphery of the rotating plate. The ends of the arc-shaped rods away from the rotating plate are rotatably connected to a rotating seat through a rotating rod. A tension spring is fixedly connected to the inner arc side of the arc-shaped rods near the rotating seat. The ends of the tension springs near the rotating plate are fixedly connected to the outer periphery of the fixed ring. A rotating ring is fixedly connected to the upper end of the fixed ring, and elastic ropes are evenly distributed on the outer periphery of the rotating ring.

[0006] Preferably, the housing mechanism includes a lower housing, an upper housing is fixedly connected to the upper end of the lower housing, a landing gear is fixedly connected to the lower end of the lower housing, a mounting ring is fixedly connected to the middle of the lower housing, and a first buckle is evenly distributed inside the mounting ring, and the first buckle engages with the second buckle.

[0007] Preferably, the lower end of the fixing ring is fixedly connected to the middle of the upper end of the rotating plate, and the lower end of the rotating plate is rotatably connected to the upper end of the mounting ring.

[0008] Preferably, the rotor mechanism includes a rotating arm and an accelerator. An arc-shaped rack is fixedly connected to the end of the rotating arm near the lower housing. Each arc-shaped rack is meshed with a gear I. Each gear I is meshed with a gear disc. Each gear disc is meshed with a gear II. The middle portion of each gear II is fixedly connected to the input end of the accelerator. A threaded rod is fixedly connected to the output end of the accelerator. A telescopic arm is threaded onto the outside of the threaded rod. A motor mount is fixedly connected to the end of the telescopic arm away from the rotating arm. A brushless motor is fixedly connected inside the motor mount. A propeller is fixedly connected to the upper drive end of the brushless motor.

[0009] Preferably, the end of the rotating seat away from the arc-shaped rod is fixedly connected to the middle of one side of the rotating arm, and the end of the elastic rope away from the rotating ring is fixedly connected to the end of one side of the rotating arm away from the lower housing.

[0010] Preferably, the ends of the rotating arms near the lower housing are rotatably connected to the four corners of the inner top wall of the upper housing, the outer sides of the gear discs are rotatably connected to the four corner openings of the lower housing, and the middle parts of the first gears are rotatably connected to the middle of the four inner corners of the upper housing via rotating rods.

[0011] Preferably, the exterior of the accelerator is fixedly connected to one end of the rotating arm near the lower housing, and the exterior of the telescopic arm is slidably connected to the interior of the rotating arm.

[0012] Preferably, the locking mechanism includes a pressing cover, a pawl rotatably connected to the middle of the pressing cover, a torsion spring fixedly connected to the upper end of the pawl, a spring fixedly connected to the lower end of the pressing cover, and an internal toothed ratchet engaged with the pawl.

[0013] Preferably, the upper end of the torsion spring is fixedly connected to the middle of the pressing cover, and the outer periphery of the pressing cover is slidably connected to the middle of the control body.

[0014] Preferably, the lower end of the spring is fixedly connected to the upper middle part of the rotating plate, and the outer periphery of the internal toothed ratchet is fixedly connected to the inner upper end of the fixed ring.

[0015] The multi-rotor intelligent camera drone with expandable public safety support module provided by this invention has the following advantages:

[0016] 1. Through the cooperation of the pull-back mechanism and the rotor mechanism, all the rotating arms can be pulled out at the same time, and the telescopic arms can extend out from the inside of the rotating arms synchronously, which simplifies the deployment of the UAV.

[0017] 2. Through the cooperation of the arc rack and gear one in the rotor mechanism, the gear disk can rotate in opposite directions, so that all the telescopic arms can be extended further, ensuring that the wind force generated by the propellers will not affect each other.

[0018] 3. Through the cooperation of the pull-back mechanism and the locking mechanism, the rotor mechanism can be locked in place with one click after rotation, making the use and storage of the drone more convenient.

[0019] 4. During the deployment of the drone, after the rotating arm rotates 70°, the tension spring is stretched to its maximum distance. When the rotating arm continues to rotate at this point, the tension spring rebounds, and the tension acting on the arc rod changes from a negative effect of the tension on the arc rod being rotated out to a positive effect on the arc rod. This makes it easier for the rotating arm to be rotated out of the upper shell, further improving the stability of the drone during flight. At the same time, it reduces the force of the tension on the pawl and internal tooth ratchet in the locking mechanism, extending the service and maintenance cycle of the drone. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A front-view stereoscopic diagram of a multi-rotor intelligent camera drone that provides a public safety support expandable module for this application;

[0022] Figure 2 A bottom-view stereoscopic diagram of a multi-rotor intelligent camera drone that provides a public safety support expandable module for this application;

[0023] Figure 3 A disassembled three-dimensional schematic diagram of a multi-rotor intelligent camera drone that provides a public safety support expandable module for this application;

[0024] Figure 4 A partially disassembled three-dimensional schematic diagram of a multi-rotor intelligent camera drone that provides a public safety support expandable module for this application;

[0025] Figure 5 A rear-view stereoscopic diagram of one of the rotor mechanisms of a multi-rotor intelligent camera drone that provides a public safety support expandable module for this application;

[0026] Figure 6 A front-view sectional perspective three-dimensional schematic diagram of one of the rotor mechanisms of a multi-rotor intelligent camera drone for the public safety support expandable module provided in this application;

[0027] Figure 7 A partial disassembly perspective view of the locking and pull-back mechanisms of the multi-rotor intelligent camera drone for the public safety support expandable module provided in this application;

[0028] Figure 8 for Figure 7 Enlarged diagram of point A in the middle.

[0029] In the diagram: 1. Shell mechanism; 11. Lower shell; 12. Upper shell; 13. Landing gear; 14. Mounting ring; 15. Snap-on one; 2. Pull-back mechanism; 21. Rotating plate; 22. Arc rod; 23. Rotating seat; 24. Tension spring; 25. Fixing ring; 26. Rotating ring; 27. Elastic rope; 3. Locking mechanism; 31. Press cover; 32. Pawl; 33. Torsion spring; 34. Spring; 35. Internal toothed ratchet; 4. Rotor mechanism; 41. Rotating arm; 42. Arc rack; 43. Gear one; 44. Gear disc; 45. Gear two; 46. Accelerator; 47. Threaded rod; 48. Telescopic arm; 49. Motor mount; 410. Brushless motor; 411. Propeller; 5. Camera module; 6. Snap-on two; 7. Control unit. Detailed Implementation

[0030] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0031] like Figures 1-8 As shown, this embodiment proposes a multi-rotor intelligent camera drone with expandable modules for public safety support, including a shell mechanism 1. A pull-back mechanism 2 is fixedly installed in the middle of the shell mechanism 1. A locking mechanism 3 is fixedly installed in the upper inner part of the shell mechanism 1. Rotor mechanisms 4 are evenly distributed on the outer periphery of the shell mechanism 1. A control body 7 is fixedly installed in the upper part of the shell mechanism 1. A camera module 5 is fixedly installed in the lower part of the shell mechanism 1. Buckles 6 are evenly distributed in the upper part of the camera module 5. The pull-back mechanism 2 includes a rotating plate 21 and a fixing ring 25. Arc-shaped rods 22 are evenly distributed on the outer periphery of the rotating plate 21. The ends of the arc-shaped rods 22 away from the rotating plate 21 are rotatably connected to a rotating seat 23 through a rotating rod. A tension spring 24 is fixedly connected to the inner arc side of the arc-shaped rods 22 near the rotating seat 23. The ends of the tension springs 24 near the rotating plate 21 are fixedly connected to the outer periphery of the fixing ring 25. A rotating ring 26 is fixedly connected to the upper part of the fixing ring 25. Elastic ropes 27 are evenly distributed on the outer periphery of the rotating ring 26.

[0032] In this embodiment, the housing mechanism 1 includes a lower housing 11, an upper housing 12 is fixedly connected to the upper end of the lower housing 11, a landing gear 13 is fixedly connected to the lower end of the lower housing 11, and a mounting ring 14 is fixedly connected to the middle of the lower housing 11. The mounting ring 14 has a series of snap fasteners 15 evenly distributed inside, and each snap fastener 15 engages with a snap fastener 6.

[0033] In this embodiment, the lower end of the fixing ring 25 is fixedly connected to the middle of the upper end of the rotating plate 21, and the lower end of the rotating plate 21 is rotatably connected to the upper end of the mounting ring 14.

[0034] Specifically, when the drone is needed for operation, any one of the rotating arms 41 can be rotated from the notch in the middle of any side of the outer periphery of the lower shell 11 and the upper shell 12. Through the cooperation of the rotating seat 23 and the arc rod 22, the rotating plate 21 is driven to rotate, which in turn drives all the arc rods 22 to rotate, causing all the rotating arms 41 to rotate and open. At the beginning of the rotation, the tension spring 24 is stretched and begins to store force, and the elastic rope 27 is released on the outer periphery of the rotating ring 26. The elastic rope is released until the rotating arm 41 rotates 45°. When the rope 27 is taut and begins to store force, after the rotating arm 41 has rotated 70°, the tension spring 24 is stretched to its maximum distance due to the arc shape of the arc rod 22. When the rotating arm 41 continues to rotate, the tension spring 24 rebounds, and the tension acting on the arc rod 22 changes from a negative effect of the tension that initially caused the arc rod 22 to be rotated out to a positive effect, making it easier for the rotating arm 41 to be rotated out of the upper housing 12, until the rotating arm 41 is rotated to 90° and then stops due to the obstruction on the side of the upper housing 12.

[0035] In this embodiment, the rotor mechanism 4 includes a rotating arm 41 and an accelerator 46. The rotating arm 41 is fixedly connected to an arc-shaped rack 42 at the end near the lower housing 11. The arc-shaped rack 42 is meshed with a gear 43. The gear 43 is meshed with a gear disk 44. The gear disk 44 is meshed with a gear 45. The middle part of the gear 45 is fixedly connected to the input end of the accelerator 46. The output end of the accelerator 46 is fixedly connected to a threaded rod 47. The threaded rod 47 is threadedly connected to a telescopic arm 48. The telescopic arm 48 is fixedly connected to a motor base 49 at the end away from the rotating arm 41. The inside of the motor base 49 is fixedly connected to a brushless motor 410. The upper drive end of the brushless motor 410 is fixedly connected to a propeller 411.

[0036] In this embodiment, the end of the rotating seat 23 away from the arc-shaped rod 22 is fixedly connected to the middle of one side of the rotating arm 41, and the end of the elastic rope 27 away from the rotating ring 26 is fixedly connected to the end of the rotating arm 41 away from the lower housing 11.

[0037] In this embodiment, the ends of the rotating arms 41 near the lower housing 11 are rotatably connected to the four corners of the inner top wall of the upper housing 12, the outer sides of the gear disks 44 are rotatably connected to the four corner openings of the lower housing 11, and the middle parts of the gears 43 are rotatably connected to the middle of the four inner corners of the upper housing 12 through rotating rods.

[0038] In this embodiment, the accelerator 46 is fixedly connected to the inside of the rotating arm 41 near the lower housing 11, and the telescopic arm 48 is slidably connected to the inside of the rotating arm 41.

[0039] Specifically, during rotation, the gear 45 and the gear plate 44 work together to drive all the telescopic arms 48 to rotate via the accelerator 46, which in turn drives all the telescopic arms 48 to extend. At the same time, the arc rack 42 drives the gear 43 to rotate, causing the gear plate 44 to rotate in the opposite direction, increasing the number of rotations of the gear 45, thus allowing the telescopic arms 48 to extend further. When retracting, pressing the press cover 31 and gently pushing one side of the rotating arm 41, after the rotating arm 41 rotates 20°, the tension force generated by the tension spring 24, the spring 34 and the elastic rope 27 keeps the rotating arm 41 springing back, and simultaneously retracts the telescopic arms 48 into the interior of the rotating arm 41. After the rotating arm 41 rotates 45°, the elastic rope 27 springs back to the normal state, while the tension spring 24 and the spring 34 continue to spring back. The rotating ring 26 wraps around the elastic rope 27 to retract the elastic rope 27 until the telescopic arms 48 are completely retracted into the interior of the rotating arm 41. Then, the rotating arm 41 is simultaneously retracted between the lower housing 11 and the upper housing 12.

[0040] In this embodiment, the locking mechanism 3 includes a pressing cover 31, a pawl 32 rotatably connected to the middle of the pressing cover 31, a torsion spring 33 fixedly connected to the upper end of the pawl 32, a spring 34 fixedly connected to the lower end of the pressing cover 31, and an internal toothed ratchet 35 engaged with the pawl 32.

[0041] In this embodiment, the upper end of the torsion spring 33 is fixedly connected to the middle part of the pressing cover 31, and the outer periphery of the pressing cover 31 is slidably connected to the middle part of the control body 7.

[0042] In this embodiment, the lower end of the spring 34 is fixedly connected to the upper middle part of the rotating plate 21, and the outer periphery of the internal tooth ratchet 35 is fixedly connected to the inner upper end of the fixing ring 25.

[0043] Specifically, the rotating plate 21 drives the fixed ring 25 to rotate through the rotating ring 26, which in turn rotates the internal tooth ratchet 35. During the process, the spring 34 also generates stored force due to the rotation, and the stored force of the spring 34 and the elastic rope 27 is slightly less than the tension of the tension spring 24. When the drone finishes its operation, rotate the camera module 5 to disengage the second latch 6 and the first latch 15, and the camera module 5 can be removed. At the same time, press the pressing cover 31 to disengage the pawl 32 from the internal tooth ratchet 35. Gently push the rotating arm 41 on one side. After the drone is retracted, release the pressing cover 31. The pawl 32 continues to engage the internal tooth ratchet 35, locking the pull-back mechanism 2 and the rotor mechanism 4, thus completing the drone's storage.

[0044] It should be noted that the control unit 7 mainly includes a protective shell, a control circuit board, a wireless signal transceiver, a battery, and a line connector, etc. It is used to receive electrical signals from the remote controller and control the flight status and shooting angle of the drone. This is existing technology and will not be described in detail here. The camera module 5 can also be replaced with other components as needed, such as grippers with a delivery function.

[0045] Working principle: First, when the drone is needed for operation, any one of the rotating arms 41 is rotated from the notch in the middle of any side of the outer periphery of the lower shell 11 and the upper shell 12. Through the cooperation of the rotating seat 23 and the arc rod 22, the rotating plate 21 is driven to rotate, which in turn drives all the arc rods 22 to rotate, causing all the rotating arms 41 to rotate and open. During the rotation, through the cooperation of gear 2 45 and the gear disk 44, all the telescopic arms 48 are driven to rotate through the accelerator 46, and then all the telescopic arms 48 are extended. At the same time, the arc rack 42 drives gear 1 43 to rotate, causing the gear disk 44 to rotate in the opposite direction, increasing the number of rotations of gear 2 45, thus allowing the telescopic arms 48 to be extended further. Meanwhile, the rotating plate 21, through... The rotating ring 26 drives the fixed ring 25 to rotate, which in turn rotates the internal gear ratchet 35. At the beginning of the rotation, the tension spring 24 is stretched and begins to store force, and the elastic rope 27 is released on the outer periphery of the rotating ring 26. After the rotating arm 41 rotates 45°, the elastic rope 27 tightens and begins to store force. After the rotating arm 41 rotates 70°, due to the arc shape of the curved rod 22, the tension spring 24 is stretched to its maximum distance. When the rotating arm 41 continues to rotate, the tension spring 24 rebounds, and the tension acting on the curved rod 22 changes from a negative effect of the tension that initially caused the curved rod 22 to rotate out to a positive effect, making it easier for the rotating arm 41 to rotate out of the upper housing 12. The rotating arm 41 stops after rotating to 90° due to the obstruction on the side of the upper housing 12. During the process, the spring 34... Since rotation also generates stored force, and the stored force of spring 34 and elastic rope 27 is slightly less than the tension of tension spring 24, after the drone finishes its operation, rotating the camera module 5 causes latch 2 6 and latch 1 15 to disengage, allowing the camera module 5 to be removed. Simultaneously, pressing the press cover 31 disengages the pawl 32 from the internal ratchet 35. Gently pushing one side of the rotating arm 41 causes the rotating arm 41 to rotate 20°. The tension generated by tension spring 24, spring 34, and elastic rope 27 keeps the rotating arm 41 springing back, simultaneously causing the telescopic arm 48 to retract into the rotating arm 41. When the rotating arm 41 rotates 45°, the elastic rope 27 returns to its normal state, while tension spring 24 and spring 34 continue to spring back. The rotating ring 26 wraps around the elastic rope 27 to retract the elastic force. Rope 27 is used until the telescopic arm 48 is fully retracted into the rotating arm 41. Simultaneously, the rotating arm 41 retracts between the lower housing 11 and the upper housing 12. The pressing cover 31 is released, and the pawl 32 continues to engage the internal ratchet 35, locking the pull-back mechanism 2 and the rotor mechanism 4. Through the cooperation of the pull-back mechanism 2 and the rotor mechanism 4, all rotating arms 41 can be pulled out simultaneously, and the telescopic arms 48 can extend synchronously from inside the rotating arms 41, simplifying the deployment of the drone. Through the cooperation of the arc-shaped rack 42 and gear 43 in the rotor mechanism 4, the gear disc 44 can rotate in the opposite direction, allowing all telescopic arms 48 to extend further, ensuring that the wind force generated by the propellers 411 does not interfere with each other. Through the cooperation of the pull-back mechanism 2 and the locking mechanism 3...This design allows the rotor mechanism 4 to be locked in place with a single click after rotation, making the drone easier to use and store. During drone deployment, after the rotating arm 41 rotates 70°, the tension spring 24 extends to its maximum distance. When the rotating arm 41 continues to rotate, the tension spring 24 rebounds, changing the initial negative effect of the tension on the curved rod 22 to a positive effect. This makes it easier for the rotating arm 41 to rotate out of the upper shell 12, improving the drone's stability during flight. Simultaneously, it reduces the tension force on the pawl 32 and internal ratchet 35 in the locking mechanism 3, extending the drone's service and maintenance cycle.

[0046] The above embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Although the invention has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of the invention do not depart from the spirit and scope of the invention and should be covered within the scope of the claims of the invention.

Claims

1. A multi-rotor intelligent camera drone with expandable modules for public safety support, including a shell structure (1), characterized in that, A pull-back mechanism (2) is fixedly installed in the middle of the inner part of the housing mechanism (1). A locking mechanism (3) is fixedly installed in the upper inner part of the housing mechanism (1). Rotor mechanisms (4) are evenly distributed on the outer periphery of the housing mechanism (1). A control body (7) is fixedly installed in the upper part of the housing mechanism (1). A camera module (5) is fixedly installed in the lower part of the housing mechanism (1). Buckles (6) are evenly distributed in the upper part of the camera module (5). The pull-back mechanism (2) includes a rotating plate (21) and a fixing ring (25). Arc rods (22) are evenly distributed on the outer periphery of the rotating plate (21). The ends of the arc rods (22) away from the rotating plate (21) are all rotatably connected to a rotating seat (23) through a rotating rod. The inner arc side of the arc rod (22) near the rotating seat (23) is fixedly connected to a tension spring (24). The end of the tension spring (24) near the rotating plate (21) is fixedly connected to the outer circumference of the fixed ring (25). The upper end of the fixed ring (25) is fixedly connected to a rotating ring (26). Elastic ropes (27) are evenly distributed on the outer circumference of the rotating ring (26). The housing mechanism (1) includes a lower housing (11). The upper end of the lower housing (11) is fixedly connected to an upper housing (12). The lower end of the lower housing (11) is fixedly connected to a landing gear (13). The middle part of the lower housing (11) is fixedly connected to a mounting ring (14). The interior of the mounting ring (14) is evenly distributed with a buckle. 15), the first buckle (15) is engaged with the second buckle (6), the lower end of the fixing ring (25) is fixedly connected to the upper middle part of the rotating plate (21), the lower end of the rotating plate (21) is rotatably connected to the upper end of the mounting ring (14), the rotor mechanism (4) includes a rotating arm (41) and an accelerator (46), the end of the rotating arm (41) near the lower housing (11) is fixedly connected to an arc-shaped rack (42), the arc-shaped rack (42) is meshed with a gear (43), the gear (43) is meshed with a gear disc (44), the gear disc (44) is meshed with a gear (45), the middle part of the gear (45) is fixedly connected to the accelerator (46). The input end of the accelerator (46) and the output end of the accelerator (46) are all fixedly connected to threaded rods (47). The external threads of the threaded rods (47) are connected to telescopic arms (48). The end of the telescopic arms (48) away from the rotating arm (41) is fixedly connected to a motor base (49). The inside of the motor base (49) is fixedly connected to a brushless motor (410). The upper drive end of the brushless motor (410) is fixedly connected to a propeller (411). The end of the rotating seat (23) away from the arc rod (22) is fixedly connected to the middle of one side of the rotating arm (41). The end of the elastic rope (27) away from the rotating ring (26) is fixedly connected to the end of one side of the rotating arm (41) away from the lower housing (11).The ends of the rotating arms (41) near the lower housing (11) are rotatably connected to the four corners of the inner top wall of the upper housing (12). The outer parts of the gear discs (44) are rotatably connected to the four corner openings of the lower housing (11). The middle parts of the gears (43) are rotatably connected to the middle of the four inner corners of the upper housing (12) via rotating rods. The outer parts of the accelerators (46) are fixedly connected to the inner end of the rotating arms (41) near the lower housing (11). The outer parts of the telescopic arms (48) are slidably connected to the inner part of the rotating arms (41).

2. The multi-rotor intelligent camera drone with expandable public safety support module according to claim 1, characterized in that, The locking mechanism (3) includes a pressing cover (31), a pawl (32) is rotatably connected to the middle of the pressing cover (31), a torsion spring (33) is fixedly connected to the upper end of the pawl (32), a spring (34) is fixedly connected to the lower end of the pressing cover (31), and an internal toothed ratchet (35) is engaged with the pawl (32).

3. The multi-rotor intelligent camera drone with expandable public safety support module according to claim 2, characterized in that, The upper end of the torsion spring (33) is fixedly connected to the middle part of the pressing cover (31), and the outer periphery of the pressing cover (31) is slidably connected to the middle part of the control body (7).

4. The multi-rotor intelligent camera drone with expandable public safety support module according to claim 3, characterized in that, The lower end of the spring (34) is fixedly connected to the upper middle part of the rotating plate (21), and the outer periphery of the internal tooth ratchet (35) is fixedly connected to the inner upper end of the fixing ring (25).

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