A drone

Abstract

The present invention belongs to the technical field of unmanned aerial vehicles, and particularly relates to an unmanned aerial vehicle. The unmanned aerial vehicle includes a fuselage; a communication component is arranged inside the fuselage; a group of retaining rings are evenly arranged on the outer side of the fuselage; a propeller is rotatably connected inside the retaining ring, and the propeller is driven by a power component; an elastic ring is fixedly connected to the outer side of the retaining ring; the elastic ring is made of rubber material, and the inside of the elastic ring is filled with air; in the unmanned aerial vehicle of the present invention, by arranging a retaining ring outside the propeller, when the unmanned aerial vehicle hits an obstacle, the retaining ring can provide a protective effect for the propeller, avoiding the problem that the blades of the propeller are broken by impact. At the same time, by arranging an elastic ring outside the retaining ring, when the unmanned aerial vehicle hits an obstacle, the elastic ring can provide a certain buffering effect, reducing the problem that the unmanned aerial vehicle loses balance and falls due to excessive impact force.

Description

Technical Field

[0001] The present invention belongs to the technical field of unmanned aerial vehicles, and particularly relates to an unmanned aerial vehicle. Background Art

[0002] Unmanned aerial vehicles are widely used. The prior art can combine unmanned aerial vehicle technology with communication technology and install communication components on unmanned aerial vehicles. The unmanned aerial vehicle can be quickly deployed to a designated position as needed to provide services to users within the coverage area. A Chinese patent with the publication number CN205249225U discloses an unmanned aerial vehicle communication system, which includes an unmanned aerial vehicle, a ground power supply device, a base station, and a cable; the base station is arranged on the unmanned aerial vehicle; one end of the cable is connected to the unmanned aerial vehicle, and the other end of the cable is connected to the ground power supply device. The unmanned aerial vehicle is connected to the ground power supply device through the cable, and the ground power supply device supplies power to the unmanned aerial vehicle and the base station through the cable. In the unmanned aerial vehicle communication system of this utility model, the unmanned aerial vehicle carrying the base station is powered by a cable connected to the ground power supply device, breaking through the limitation of the existing unmanned aerial vehicle communication system that is powered by its own battery, and greatly improving the in-air time length of the unmanned aerial vehicle.

[0003] In the prior art, the unmanned aerial vehicle needs to fly at high altitude. Since the propellers of the unmanned aerial vehicle are exposed, when the unmanned aerial vehicle hits an obstacle, the blades of the propellers are easily broken, resulting in the problem that the unmanned aerial vehicle cannot continue to work and quickly falls. Summary of the Invention

[0004] In order to make up for the deficiencies of the prior art and solve at least one of the technical problems proposed in the background art.

[0005] The technical solution adopted by the present invention to solve its technical problems is as follows: An unmanned aerial vehicle of the present invention includes a fuselage; a communication component is arranged inside the fuselage; a group of retaining rings are evenly arranged on the outer side of the fuselage; a propeller is rotatably connected inside the retaining ring, and the propeller is driven by a power component; an elastic ring is fixedly connected to the outer side of the retaining ring; the elastic ring is made of rubber material, and the inside of the elastic ring is filled with air; when the unmanned aerial vehicle in the prior art is used as an unmanned aerial vehicle, the unmanned aerial vehicle needs to fly at high altitude. Since the propellers of the unmanned aerial vehicle are exposed, when the unmanned aerial vehicle hits an obstacle, the blades of the propellers are easily broken, resulting in the problem that the unmanned aerial vehicle cannot continue to work and quickly falls; at this time, for the unmanned aerial vehicle of the present invention, by arranging a retaining ring outside the propeller, when the unmanned aerial vehicle hits an obstacle, the retaining ring can provide a protective effect for the propeller to avoid the problem that the blades of the propeller are broken by impact. At the same time, by arranging an elastic ring outside the retaining ring, when the unmanned aerial vehicle hits an obstacle, the elastic ring can provide a certain buffering effect to reduce the problem that the impact force is too large and causes the unmanned aerial vehicle to lose balance and fall.

[0006] Preferably, mounting grooves are formed on both the upper and lower sides of the fuselage; a baffle is slidably connected to the opening position of the mounting groove; a buffer airbag is fixedly connected between the baffle and the bottom of the mounting groove; an air source is arranged inside the fuselage, and the air source is communicated with the buffer airbag through a pipeline; an acceleration sensor and a controller are arranged inside the fuselage; when the drone rapidly drops due to hitting an obstacle or other reasons, at this time, it is detected by the acceleration sensor that the drone is in a weightless state, and the controller controls the air source to start. Then, the air source inflates a pair of buffer airbags and makes them rapidly expand. The buffer airbags push the baffle outwards, so that the buffer airbags can provide a certain buffering effect for the drone after landing, and reduce the damage suffered by the drone when falling.

[0007] Preferably, a storage cavity is formed inside the baffle; a smoke outlet is formed on one side of the baffle away from the buffer airbag, and the smoke outlet is communicated with the storage cavity; an elastic membrane is fixedly connected inside the storage cavity, and a signal smoke is filled in the cavity between the elastic membrane and the storage cavity away from the smoke outlet; a first thimble is arranged inside the storage cavity near the buffer airbag; a counterweight is fixedly connected to one side of the elastic membrane close to the thimble through a connecting rope; by filling the signal smoke inside the storage cavity, when the drone hits the ground during falling, a strong impact force will be generated. Then, the counterweight moves downwards under the action of inertia and drives the elastic membrane to deform and bend. Then, the first thimble pierces the elastic membrane, and the signal smoke inside the storage cavity escapes outwards through the break of the elastic membrane and the smoke outlet, which is convenient for the staff to search for the fallen drone.

[0008] Preferably, a mutually communicated chute is formed between the storage cavity and the buffer airbag; a slider is slidably connected inside the chute; the first thimble is located inside the chute, and the first thimble is fixedly connected to one side of the slider close to the elastic membrane; an elastic strip is fixedly connected between the side of the slider away from the thimble and the side wall of the chute; since the drone will also generate small-amplitude bumps and shakes during transportation or flight, resulting in the jitter of the counterweight, which may cause the problem that the first thimble pierces the elastic membrane in advance. This problem can be avoided by retracting the first thimble into the chute. When the buffer airbag rapidly expands when the drone drops, a relatively large pressure is generated inside the buffer airbag at this time, and the pressure pushes the slider to slide inside the chute. Then, the slider pushes the first thimble into the storage cavity, so that when the drone hits the ground subsequently, the first thimble can smoothly pierce the elastic membrane.

[0009] Preferably, a guide groove is provided inside the baffle plate, and the smoke outlet hole passes through the guide groove; a sealing plate is slidably connected inside the guide groove; a spring is fixedly connected between the sealing plate and the side wall of the guide groove; a connecting hole is provided on the surface of the sealing plate, and the connecting hole is misaligned with the smoke outlet hole; the cavity of the guide groove near the connecting hole is connected with the buffer airbag through a pipeline; under normal circumstances, the sealing plate blocks the smoke outlet to prevent rainwater from entering the storage cavity through the smoke outlet hole during the flight of the drone, resulting in the problem of corrosion of the elastic membrane by rainwater, and the buffer airbag expands rapidly when the drone falls, at this time, the gas inside the buffer airbag enters the guide groove through the pipeline, and pushes the sealing plate to slide inside the guide groove, and then the connecting hole is aligned and connected with the smoke outlet hole, so that the signal smoke inside the subsequent storage cavity can escape smoothly through the connecting hole and the smoke outlet hole.

[0010] Preferably, an air outlet hole that is interconnected is provided between the storage cavity and the cushion airbag, and the counterweight block is slidably connected inside the air outlet hole; a sealing film is fixedly connected inside the air outlet hole near the cushion airbag; a guide hole is provided inside the counterweight block; a second ejector pin is fixedly connected to one side of the counterweight block near the sealing film; by providing the air outlet hole, when the drone falls, it hits the ground, and then the counterweight block moves downward under the action of inertia, so that the second ejector pin punctures the sealing film, and then the gas inside the cushion airbag can enter the storage cavity through the air outlet hole and blow the signal smoke inside the storage cavity, thereby quickly exporting the signal smoke, increasing the escape speed of the signal smoke, and blowing the signal smoke to a higher height, which is convenient for the staff to search.

[0011] Preferably, the baffle is arranged in a circular shape, and a group of mounting holes are evenly opened on the circumferential surface of the baffle; a telescopic tube is fixedly connected to the inside of the mounting hole, and the telescopic tube is connected to the cushion airbag through a pipeline; the telescopic tube comprises a plurality of tube bodies which are mutually socketed and slidably connected; when the cushion airbag expands, the gas inside it will be synchronously introduced into the inside of the telescopic tube through the pipeline, thereby prompting the telescopic tube to extend and unfold outward, and a protective frame formed by the unfolding of the multiple telescopic tubes of a pair of baffles can shield the fuselage and the baffle ring, so that the fuselage and the baffle ring are both located between the two layers of telescopic tubes, thereby preventing the baffle ring from hitting the ground first, resulting in the baffle ring and the propeller inside it breaking, thereby further reducing the degree of damage to the drone.

[0012] Preferably, an elastic rope is fixedly connected between the ends of adjacent telescopic tubes, and the elastic rope is in a relaxed state; by providing the elastic rope, the elastic rope will be stretched after the multiple telescopic tubes are unfolded, and then the elastic rope is in a taut state, so that the impact force between adjacent telescopic tubes can be balanced with each other, thereby improving the overall strength of the protection frame formed by the telescopic tubes, thereby improving the protection effect on the fuselage and the retaining ring.

[0013] The beneficial effects of the present invention are as follows:

[0014] 1. A drone according to the present invention is provided with a retaining ring outside the propeller. When the drone hits an obstacle, the retaining ring can provide protection for the propeller, avoiding the problem of the propeller blades being broken by impact. At the same time, by setting an elastic ring outside the retaining ring, when the drone hits an obstacle, the elastic ring can provide a certain buffering effect, reducing the problem that the drone loses balance and falls due to excessive impact force.

[0015] 2. For a drone according to the present invention, when the drone rapidly drops due to hitting an obstacle or other reasons, at this time, the acceleration sensor detects that the drone is in a weightless state, and the controller controls the gas source to start. Then the gas source inflates a pair of buffer air bags and makes them expand rapidly. The buffer air bags pop the baffle outwards, so that the buffer air bags can provide a certain buffering effect for the drone after landing, reducing the damage suffered by the drone when it falls. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 is a perspective view of the present invention;

[0018] Figure 2 is a cross-sectional view of the present invention;

[0019] Figure 3 is Figure 2 a partial enlarged view of part A in

[0020] Figure 4 is a cross-sectional view of the baffle in the present invention;

[0021] In the figure: fuselage 1, retaining ring 2, propeller 3, elastic ring 4, mounting groove 5, baffle 6, buffer air bag 7, gas source 8, storage cavity 9, smoke outlet hole 10, elastic membrane 11, first thimble 12, connecting rope 13, counterweight 14, sliding groove 15, slider 16, elastic strip 17, guiding groove 18, blocking plate 19, connecting hole 20, air outlet hole 21, sealing membrane 22, guiding hole 23, second thimble 24, mounting hole 25, telescopic tube 26, elastic rope 27. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0023] Embodiment 1

[0024] As Figures 1 to 2As shown in the figure, a drone according to an embodiment of the present invention includes a fuselage 1; a communication component is provided inside the fuselage 1; a group of retaining rings 2 are evenly arranged on the outer side of the fuselage 1; a propeller 3 is rotatably connected inside the retaining ring 2, and the propeller 3 is driven by a power component; an elastic ring 4 is fixedly connected to the outer side of the retaining ring 2; the elastic ring 4 is made of rubber material, and the inside of the elastic ring 4 is filled with air; in the prior art, drones need to fly at high altitudes. Since the propellers 3 of the drones are exposed outside, when the drones hit obstacles, the blades of the propellers 3 are easily broken, resulting in the problem that the drones cannot continue to work and quickly fall; at this time, in the drone of the present invention, by arranging a retaining ring 2 outside the propeller 3, when the drone hits an obstacle, the retaining ring 2 can provide a protective effect for the propeller 3, avoiding the problem that the blades of the propeller 3 are broken by impact. At the same time, by arranging an elastic ring 4 outside the retaining ring 2, when the drone hits an obstacle, the elastic ring 4 can provide a certain buffering effect, reducing the problem that the impact force is too large, causing the drone to lose balance and fall.

[0025] Installation grooves 5 are opened on both the upper and lower sides of the fuselage 1; a baffle 6 is slidably connected to the opening position of the installation groove 5; a buffer airbag 7 is fixedly connected between the baffle 6 and the bottom of the installation groove 5; an air source 8 is provided inside the fuselage 1, and the air source 8 is communicated with the buffer airbag 7 through a pipeline; an acceleration sensor and a controller are provided inside the fuselage 1; when the drone quickly falls due to hitting an obstacle or other reasons, at this time, it is detected by the acceleration sensor that the drone is in a weightless state, and the controller controls the air source 8 to start. Then, the air source 8 inflates a pair of buffer airbags 7 and makes them expand rapidly. The buffer airbags 7 pop the baffle 6 outwards, so that the buffer airbags 7 can provide a certain buffering effect for the drone after it lands, reducing the damage suffered by the drone when it falls.

[0026] As Figure 3 shown, a storage cavity 9 is opened inside the baffle 6; a smoke outlet hole 10 is opened on the side of the baffle 6 away from the buffer airbag 7, and the smoke outlet hole 10 is communicated with the storage cavity 9; an elastic membrane 11 is fixedly connected inside the storage cavity 9, and a signal smoke is filled in the cavity between the elastic membrane 11 and the storage cavity 9 away from the smoke outlet hole 10; a first thimble 12 is provided inside the storage cavity 9 near the buffer airbag 7; a counterweight 14 is fixedly connected to the side of the elastic membrane 11 close to the thimble through a connecting rope 13; by filling signal smoke inside the storage cavity 9, when the drone hits the ground during falling, a strong impact force will be generated. Then, the counterweight 14 moves downward under the action of inertia and drives the elastic membrane 11 to deform and bend. Then, the first thimble 12 pierces the elastic membrane 11, and the signal smoke inside the storage cavity 9 escapes outwards through the break of the elastic membrane 11 and the smoke outlet hole 10, facilitating the search for the fallen drone by the staff.

[0027] A slide groove 15 that is interconnected is provided between the storage cavity 9 and the cushion airbag 7; a slider 16 is slidably connected inside the slide groove 15; the first ejector pin 12 is located inside the slide groove 15, and the first ejector pin 12 is fixedly connected to a side of the slider 16 close to the elastic membrane 11; an elastic strip 17 is fixedly connected between the side of the slider 16 away from the ejector pin and the side wall of the slide groove 15; since the drone may also produce a small degree of bumps and shakes during transportation or flight, causing the counterweight block 14 to shake, which may cause the first ejector pin 12 to puncture the elastic membrane 11 in advance, this problem can be avoided by putting the first ejector pin 12 into the slide groove 15, and when the drone falls, the cushion airbag 7 expands rapidly, at this time, a large pressure is generated inside the cushion airbag 7, and the slider 16 is pushed to slide inside the slide groove 15, and then the slider 16 pushes the first ejector pin 12 into the storage cavity 9, so that when the drone hits the ground later, the first ejector pin 12 can puncture the elastic membrane 11 smoothly.

[0028] A guide groove 18 is provided inside the baffle 6, and the smoke outlet 10 passes through the guide groove 18; a blocking plate 19 is slidably connected inside the guide groove 18; a spring is fixed between the blocking plate 19 and the side wall of the guide groove 18; a connecting hole 20 is provided on the surface of the blocking plate 19, and the connecting hole 20 is misaligned with the smoke outlet 10; the cavity of the guide groove 18 near the connecting hole 20 is connected to the buffer airbag 7 through a pipeline; under normal circumstances, the blocking plate 19 blocks the smoke outlet 10 to prevent During the flight of the drone, rainwater enters the storage chamber 9 through the smoke outlet 10, causing the elastic membrane 11 to be corroded by rainwater. When the drone falls, the cushioning airbag 7 expands rapidly. At this time, the gas inside the cushioning airbag 7 enters the guide groove 18 through the pipeline, and pushes the sealing plate 19 to slide inside the guide groove 18, thereby aligning and connecting the connecting hole 20 with the smoke outlet 10, so that the signal smoke inside the subsequent storage chamber 9 can escape smoothly through the connecting hole 20 and the smoke outlet 10.

[0029] An air outlet 21 that is interconnected is provided between the storage cavity 9 and the cushion airbag 7, and the counterweight 14 is slidably connected inside the air outlet 21; a sealing film 22 is fixedly connected inside the air outlet 21 near the cushion airbag 7; a guide hole 23 is provided inside the counterweight 14; a second ejector pin 24 is fixedly connected to one side of the counterweight 14 near the sealing film 22; by providing the air outlet 21, when the drone falls, it hits the ground, and then the counterweight 14 moves downward under the action of inertia, so that the second ejector pin 24 punctures the sealing film 22, and then the gas inside the cushion airbag 7 can enter the storage cavity 9 through the air outlet 21, and blow the signal smoke inside the storage cavity 9, so that the signal smoke is quickly discharged, the escape speed of the signal smoke is increased, and the signal smoke can be blown to a higher height, which is convenient for the staff to search.

[0030] Embodiment 2

[0031] As Figure 4 shown, compared with the first comparative example, another implementation manner of the present invention is as follows: the baffle 6 is arranged in a circular shape, and a set of mounting holes 25 are evenly formed on the circumferential surface of the baffle 6; a telescopic tube 26 is fixedly connected inside the mounting hole 25, and the telescopic tube 26 is communicated with the buffer airbag 7 through a pipeline; the telescopic tube 26 includes a plurality of tube bodies sleeved and slidably connected to each other; when the buffer airbag 7 expands, the gas inside it will be synchronously introduced into the telescopic tube 26 through the pipeline, thereby causing the telescopic tube 26 to extend and expand outwards. The protective frame formed by the expansion of the plurality of telescopic tubes 26 of the pair of baffles 6 can shield the fuselage 1 and the retaining ring 2, so that both the fuselage 1 and the retaining ring 2 are located between the two layers of telescopic tubes 26, avoiding the problem that the retaining ring 2 hits the ground first, resulting in the breakage of the retaining ring 2 and the propeller 3 inside it, and further reducing the damage degree to the drone.

[0032] An elastic cord 27 is fixedly connected between the ends of adjacent telescopic tubes 26, and the elastic cord 27 is in a relaxed state; by setting the elastic cord 27, when the plurality of telescopic tubes 26 expand, the elastic cord 27 will be stretched, and thus the elastic cord 27 is in a taut state, enabling the adjacent telescopic tubes 26 to balance the impact force with each other, improving the overall strength of the protective frame formed by the telescopic tubes 26, and thereby enhancing the protection effect on the fuselage 1 and the retaining ring 2.

[0033] Working principle: In the drone of the present invention, by arranging a retaining ring 2 outside the propeller 3, when the drone hits an obstacle, the retaining ring 2 can provide protection for the propeller 3 to avoid the problem of the blades of the propeller 3 being broken by impact. At the same time, by arranging an elastic ring 4 outside the retaining ring 2, when the drone hits an obstacle, the elastic ring 4 can provide a certain buffering effect to reduce the problem that the drone loses balance and falls due to excessive impact force; when the drone rapidly drops due to hitting an obstacle or other reasons, at this time, the acceleration sensor detects that the drone is in a weightless state, and the controller controls the air source 8 to start. Then, the air source 8 inflates a pair of buffer airbags 7 and makes them expand rapidly. The buffer airbags 7 push the baffle 6 outwards, so that the buffer airbags 7 can provide a certain buffering effect for the drone after landing and reduce the damage suffered by the drone when it falls; by filling signal smoke in the storage cavity 9, when the drone hits the ground during the fall, a strong impact force will be generated. Then, the counterweight 14 moves downward under the action of inertia and drives the elastic membrane 11 to deform and bend. Then, the first thimble 12 pierces the elastic membrane 11, and the signal smoke in the storage cavity 9 escapes outwards through the break of the elastic membrane 11 and the smoke outlet hole 10, which is convenient for the staff to search for the fallen drone; since the drone will also generate small bumps and vibrations during transportation or flight, resulting in the counterweight 14 shaking, which may cause the problem that the first thimble 12 pierces the elastic membrane 11 in advance. This problem can be avoided by retracting the first thimble 12 into the chute 15. When the buffer airbag 7 expands rapidly when the drone drops, at this time, a relatively large pressure is generated inside the buffer airbag 7, and it pushes the slider 16 to slide inside the chute 15. Then, the slider 16 pushes the first thimble 12 into the storage cavity 9, so that when the drone hits the ground subsequently, the first thimble 12 can smoothly pierce the elastic membrane 11; normally, the blocking plate 19 blocks the smoke outlet hole 10 to avoid the problem that rainwater enters the storage cavity 9 through the smoke outlet hole 10 during the flight of the drone, resulting in the elastic membrane 11 being corroded by rainwater. When the buffer airbag 7 expands rapidly when the drone drops, at this time, the gas inside the buffer airbag 7 enters the guiding groove 18 through the pipeline and pushes the blocking plate 19 to slide inside the guiding groove 18. Then, the connecting hole 20 is aligned and communicated with the smoke outlet hole 10, so that the subsequent signal smoke in the storage cavity 9 can escape smoothly through the connecting hole 20 and the smoke outlet hole 10; by arranging the air outlet hole 21, when the drone hits the ground during the fall, the counterweight 14 moves downward under the action of inertia, so that the second thimble 24 pierces the sealing membrane 22. Then, the gas inside the buffer airbag 7 can enter the storage cavity 9 through the air outlet hole 21 and blow the signal smoke inside the storage cavity 9, thereby quickly exporting the signal smoke, increasing the escape speed of the signal smoke, and blowing the signal smoke to a higher height, which is convenient for the staff to search;When the buffer airbag 7 expands, the gas inside it will be synchronously introduced into the telescopic tube 26 through the pipeline, thereby prompting the telescopic tube 26 to extend and expand outward. The protective frame formed by the expansion of the plurality of telescopic tubes 26 of the pair of baffles 6 can shield the fuselage 1 and the retaining ring 2, so that both the fuselage 1 and the retaining ring 2 are located between the two layers of telescopic tubes 26, avoiding the problem that the retaining ring 2 hits the ground first, resulting in the breakage of the retaining ring 2 and the propeller 3 inside it, and further reducing the damage degree to the drone. By setting the elastic rope 27, when the plurality of telescopic tubes 26 expand, the elastic rope 27 will be stretched, and then the elastic rope 27 is in a taut state, so that the impact force can be balanced between adjacent telescopic tubes 26, improving the overall strength of the protective frame formed by the telescopic tubes 26, thereby improving the protection effect on the fuselage 1 and the retaining ring 2.

[0034] The above front, back, left, right, up, and down are all based on the Figure 1 in the attached drawings of the specification. Taking the observer's perspective as the standard, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0035] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A drone, characterized in that: it includes a fuselage (1); a communication component is provided inside the fuselage (1); a set of retaining rings (2) are evenly arranged outside the fuselage (1); a propeller (3) is rotatably connected inside the retaining ring (2), and the propeller (3) is driven by a power component; an elastic ring (4) is fixedly connected to the outside of the retaining ring (2); the elastic ring (4) is made of rubber material, and the inside of the elastic ring (4) is filled with air. Installation grooves (5) are opened on both the upper and lower sides of the fuselage (1); a baffle (6) is slidably connected to the opening position of the installation groove (5); a buffer airbag (7) is fixedly connected between the baffle (6) and the bottom of the installation groove (5); a gas source (8) is provided inside the fuselage (1), and the gas source (8) is communicated with the buffer airbag (7) through a pipeline; an acceleration sensor and a controller are provided inside the fuselage (1), and a storage cavity (9) is opened inside the baffle (6); a smoke outlet hole (10) is opened on the side of the baffle (6) away from the buffer airbag (7), and the smoke outlet hole (10) is communicated with the storage cavity (9); an elastic membrane (11) is fixedly connected inside the storage cavity (9), and the cavity between the elastic membrane (11) and the storage cavity (9) away from the smoke outlet hole (10) is filled with signal smoke; a first thimble (12) is provided inside the storage cavity (9) near the buffer airbag (7); a counterweight (14) is fixedly connected to the side of the elastic membrane (11) close to the thimble through a connecting rope (13).

2. The drone according to claim 1, characterized in that: a mutually communicating chute (15) is opened between the storage cavity (9) and the buffer airbag (7); a slider (16) is slidably connected inside the chute (15); the first thimble (12) is located inside the chute (15), and the first thimble (12) is fixedly connected to the side of the slider (16) close to the elastic membrane (11); an elastic strip (17) is fixedly connected between the side of the slider (16) away from the thimble and the side wall of the chute (15).

3. The drone according to claim 2, characterized in that: a guiding groove (18) is opened inside the baffle (6), and the smoke outlet hole (10) penetrates through the guiding groove (18); a blocking plate (19) is slidably connected inside the guiding groove (18); a spring is fixedly connected between the blocking plate (19) and the side wall of the guiding groove (18); a connecting hole (20) is penetrated through the surface of the blocking plate (19), and the connecting hole (20) is misaligned with the smoke outlet hole (10); the cavity of the guiding groove (18) near the connecting hole (20) is communicated with the buffer airbag (7) through a pipeline.

4. The drone according to claim 3, characterized in that: An air outlet hole (21) that communicates with each other is provided between the storage cavity (9) and the buffer airbag (7), and the counterweight (14) is slidably connected inside the air outlet hole (21); a sealing film (22) is fixedly connected inside the air outlet hole (21) near the buffer airbag (7); a guide hole (23) is provided inside the counterweight (14); a second thimble (24) is fixedly connected to one side of the counterweight (14) close to the sealing film (22).

5. A drone according to claim 4, characterized in that: The baffle (6) is circular, and a set of mounting holes (25) are evenly provided on the circumferential surface of the baffle (6); a telescopic tube (26) is fixedly connected inside the mounting hole (25), and the telescopic tube (26) is communicated with the buffer airbag (7) through a pipeline; the telescopic tube (26) includes a plurality of tube bodies that are sleeved and slidably connected to each other.

6. A drone according to claim 5, characterized in that: An elastic cord (27) is fixedly connected between the ends of adjacent telescopic tubes (26), and the elastic cord (27) is in a relaxed state.

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