Parachute and unmanned aerial vehicle

Abstract

This invention discloses a parachute and an unmanned aerial vehicle (UAV). The parachute includes a shaping ring and a canopy. The shaping ring can be fully deployed outside the protective cover of the UAV, or folded and stored inside the protective cover in one or more loops. The lower edge of the canopy is fitted around the outer periphery of the shaping ring. The canopy is connected to the protective cover circumferentially by multiple first suspension ropes. The canopy has at least one through-hole and a wind-blocking structure for limiting the airflow through the through-hole. When the parachute needs to be deployed, the shaping ring will open the lower edge of the canopy, and the wind-blocking structure on the canopy will block the through-hole under the action of airflow to limit the airflow area of ​​the through-hole, so as to effectively decelerate the UAV when it falls. When the parachute is not in use, the canopy and the shaping ring can be folded and stored inside the protective cover, but the through-hole on the canopy remains open, so that the airflow generated when the rotor is running can smoothly pass through the inside of the shaping ring and the through-hole on the canopy, thereby ensuring the flight stability of the UAV.

Description

Technical Field

[0001] This invention relates to the field of unmanned aerial vehicle technology, and more particularly to a parachute and an unmanned aerial vehicle. Background Technology

[0002] With the rapid development of drone technology and the continuous expansion of application scenarios, drone safety issues have become an increasingly important factor restricting the steady progress of the industry. During flight, drones may encounter unexpected situations such as power system failure, signal loss, and interference from extreme weather. Once they lose control and crash, they will not only cause huge losses to the drone itself and the equipment it carries, but may also pose a threat to people and facilities on the ground. In this context, the parachute, as the last line of defense for drones, is of paramount importance. It can effectively slow down the descent speed of drones, reduce the impact of the fall, and minimize property damage and casualties.

[0003] In existing technologies, most drone parachutes have multiple suspending ropes evenly distributed around the lower edge of the parachute. The lower ends of these ropes converge and are connected to the center of gravity of the drone via a main rope. This results in a small overall volume of the parachute when deployed, leading to less air resistance and a weaker load-bearing capacity. Consequently, the parachute cannot effectively decelerate the drone during a crash, and the risk of drone damage remains. In addition, most drone parachutes are stored in a box at the top of the drone's fuselage. This box can obstruct the airflow generated by the rotor's operation, which can affect the drone's flight stability and reduce its payload capacity. Summary of the Invention

[0004] This invention provides a parachute and an unmanned aerial vehicle (UAV). The parachute uses a shaping ring, which increases the overall volume of the parachute after deployment, effectively improving its load-bearing capacity and providing effective deceleration during UAV descent. Furthermore, when not in use, the parachute and shaping ring can be stored inside the UAV's protective housing. Airflow generated during rotor operation can smoothly pass through the inside of the protective housing (through holes on the parachute), ensuring the UAV's stability during flight and effectively improving its flight capability. The UAV of this invention, using the aforementioned parachute, should also possess the aforementioned technical effects.

[0005] In a first aspect, the present invention provides a parachute for use in an unmanned aerial vehicle (UAV), the UAV including multiple rotors and a protective shield, the rotors being disposed within the protective shield;

[0006] The parachute includes:

[0007] A shaping ring that can be fully unfolded outside the protective cover and folded into the protective cover in one or more loops;

[0008] And the umbrella body, the lower edge of which is fitted around the outer periphery of the shaping ring, the umbrella body being connected to the protective cover in the circumferential direction by multiple first suspension ropes, and the umbrella body having at least one through hole and a windproof structure for limiting the air intake of the through hole;

[0009] When the umbrella is deployed outside the protective cover, the windproof structure will block the through hole to limit the air intake area of ​​the through hole;

[0010] When the umbrella body is folded and stored inside the protective cover, the through hole remains open, allowing the airflow generated during rotor operation to pass smoothly through its interior.

[0011] In some embodiments, the top of the umbrella body is provided with the through hole, the windproof structure includes a windproof part disposed at the through hole, the number of the windproof parts is one or more, and the end of the windproof part is connected to the fuselage of the unmanned aerial vehicle via a suspension rope;

[0012] The umbrella body is configured to move axially relative to the suspension rope and the first suspension rope when subjected to air resistance, and in conjunction with the pulling of the suspension rope, cause the windproof part to bend horizontally and bend to block the through hole.

[0013] In some embodiments, when the number of windproof parts is one, the suspension rope is configured to pass through the interior of the umbrella body or adjacent to the side of the umbrella body;

[0014] Furthermore, the hoisting rope is provided independently of the first hoisting rope, or the hoisting rope is one of the first hoisting ropes.

[0015] In some embodiments, when there are multiple windbreaks, the windbreaks are evenly distributed around the through holes, the suspension rope is disposed on the outside of the umbrella body, the suspension rope includes a main rope segment and multiple branch rope segments connected to the main rope segment, the end of the main rope segment is configured to connect to the fuselage, and one branch rope segment is connected to the end of one windbreak.

[0016] In some embodiments, the windproof portion is provided with a windproof awning, which is disposed along the contour shape of the windproof portion at the edge of the windproof portion, and the windproof awning is disconnected at the position where the windproof portion connects to the through hole. When the windproof portion is bent to form the umbrella top of the umbrella body, the windproof awnings on two adjacent windproof portions can prevent the airflow from widening the gap between them.

[0017] In some embodiments, when there are multiple windbreaks, the windbreaks are evenly distributed in the circumferential direction of the through hole;

[0018] There are multiple suspension ropes, each corresponding to one of the windbreaks;

[0019] The suspension rope is configured to pass through the interior of the umbrella body or adjacent to the side of the umbrella body, and one suspension rope and the corresponding windproof part are spaced apart from each other in the radial direction of the umbrella body.

[0020] In some embodiments, the plurality of suspension ropes are divided into an inner suspension rope group and an outer suspension rope group. The inner suspension rope group is disposed adjacent to the inner side of the umbrella body, and the suspension ropes of the inner suspension rope group are arranged to cross each other. The outer suspension rope group is disposed adjacent to the outer side of the umbrella body, and the suspension ropes of the outer suspension rope group are arranged to cross each other.

[0021] In some embodiments, the umbrella body is provided with a number of positioning structures corresponding to the number of suspension ropes, with one suspension rope connected to one positioning structure, and the positioning structure allows the umbrella body to be axially displaced relative to the suspension ropes under the action of airflow.

[0022] In some embodiments, the positioning structure includes positioning stickers, each of which defines a threading hole on the side of the umbrella body, and the hanging ropes are threaded through the threading holes one by one.

[0023] In some embodiments, the number of the suspension ropes is equal to that of the first suspension rope, and the first suspension rope is configured as the suspension rope.

[0024] In some embodiments, the side of the parachute body is provided with a plurality of through holes, which are evenly spaced apart in the circumferential direction of the parachute body. When the parachute body is folded and stored inside the protective cover, at least one of the through holes remains open and is vertically connected to the shaping ring so that the airflow generated when the rotor is operating is allowed to flow smoothly through the parachute.

[0025] The windproof structure includes multiple windproof plates, one or more of which are connected to the lower edge of a through hole. The windproof plates can block or cover the through hole under the action of airflow.

[0026] In some embodiments, the side of the umbrella body has an odd number of through holes.

[0027] In some embodiments, the side of the umbrella body has an even number of through holes, which are paired up, and when the umbrella body is folded and stored in the protective cover, one pair of the through holes remains open.

[0028] In some embodiments, each rotor has a pre-defined ventilation area, and the opening area of ​​any one of the through holes is greater than or equal to the sum of the ventilation areas of the plurality of rotors.

[0029] In some embodiments, the area of ​​the wind deflector is larger than the opening area of ​​the through hole.

[0030] In some embodiments, the shape of the windshield includes ellipse, circle and its approximation, rectangle and its approximation, and triangle and its approximation;

[0031] Wherein, the approximate shape of the circle is a closed figure formed by arbitrarily arranging straight line segments and / or curved line segments;

[0032] The approximate shape of the rectangle is a closed figure formed by arbitrarily arranging straight line segments and / or curved line segments;

[0033] The approximate shape of the triangle is a closed figure formed by arbitrarily arranging straight line segments and / or curved line segments.

[0034] In some embodiments, at least one pair of through holes are provided on the side of the umbrella body, and the two pairs of through holes are arranged correspondingly along the folding direction of the umbrella body, so that when the umbrella body is folded and stored inside the protective cover, the two pairs of through holes remain open to allow the airflow generated when the rotor is operating to flow smoothly.

[0035] The windproof structure includes an inner liner, and the opening of the inner liner has multiple anchoring points spaced apart in the circumferential direction. The inner liner is connected to the shaping ring or the umbrella body through the anchoring points. The inner liner can be unfolded into an umbrella shape under the action of airflow and completely seal the through hole.

[0036] In some embodiments, the inner liner includes an inner liner body and an air-gathering surface. The inner liner body is housed inside the umbrella body. The air-gathering surface is formed at the opening of the inner liner body and closes the inner liner body. An air inlet is provided on the air inlet, and a one-way valve structure is provided at the air inlet, wherein the body is placed inside the inner liner body. The air-gathering surface is used to guide airflow to the air inlet and enter the interior of the inner liner body through the one-way valve structure. The one-way valve structure is used to restrict the outflow of airflow from the inner liner body.

[0037] In some embodiments, the one-way valve structure includes a pipe section, a deformation section, and a flexible section connected sequentially. The pipe section is connected to the air inlet. When the external air pressure is greater than the air pressure inside the inner liner body, the deformation section will open under the impact of the external air pressure. When the air pressure inside the inner liner body is greater than the external air pressure, the deformation section will close under the action of the air pressure inside the inner liner body.

[0038] In some embodiments, the deformation section includes two elastic wall portions arranged opposite to each other. The two elastic wall portions are in a closed state in their natural state. When the external air pressure is greater than the air pressure inside the inner liner body, the two elastic wall portions will be impacted by the external air pressure and open relative to each other.

[0039] Alternatively, the deformation section includes two flexible wall portions arranged opposite each other, each of which is provided with a magnetic element. The two magnetic elements can attract each other so that the two flexible wall portions fit together. When the external air pressure is greater than the air pressure inside the inner liner, the two magnetic elements will be impacted by the external air pressure and move away from each other so that the two flexible wall portions open relative to each other.

[0040] In some embodiments, the shaping ring is a ring that can be driven to deform and can recover its shape without external force.

[0041] In some embodiments, the shaping ring is made of one or more materials selected from plastic, glass fiber, carbon fiber and metal.

[0042] In some embodiments, the shaping ring is provided with a plurality of movable joints, the plurality of movable joints being evenly distributed at circumferential intervals along the shaping ring, and the plurality of movable joints dividing the shaping ring into multiple arc-shaped units.

[0043] In a second aspect, the present invention also provides an unmanned aerial vehicle, including multiple rotors, a protective shield, and a parachute as described in the first aspect, wherein the protective shield is provided with a ventilation structure that allows airflow generated when the rotors are operating to flow smoothly through the interior of the protective shield.

[0044] As can be seen from the above technical solutions, the present invention has the following advantages:

[0045] The parachute of this invention is applied to unmanned aerial vehicles (UAVs). The parachute includes a shaping ring and a canopy. The shaping ring can be fully deployed outside the protective shield of the UAV, or folded and stored inside the protective shield in one or more loops. The lower edge of the canopy is fitted around the outer periphery of the shaping ring. The canopy is connected to the protective shield circumferentially via multiple first suspension ropes. The canopy has at least one through-hole and a wind-blocking structure for limiting the airflow through the through-hole. When the parachute needs to be deployed, the shaping ring expands the lower edge of the canopy, increasing the overall volume of the canopy. Simultaneously, the wind-blocking structure on the canopy blocks the through-hole under the action of airflow, thus limiting the airflow area of ​​the through-hole. The parachute fully unfolds under the influence of airflow, which creates greater resistance to the parachute. This allows the parachute and its windproof structure to effectively slow down the UAV during a crash, preventing it from falling. When not in use, the parachute and its shaping ring can be folded and stored inside the protective cover, with the openings on the parachute remaining open. These openings are vertically connected to the inner ring of the folded shaping ring, allowing the airflow generated by the rotors to flow smoothly through the shaping ring and the openings on the parachute during flight. This ensures flight stability and effectively improves the UAV's payload capacity.

[0046] The unmanned aerial vehicle of the present invention is equipped with the aforementioned parachute and should also possess the aforementioned technical effects of the parachute. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in this invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0048] Figure 1 This is a schematic diagram of the fuselage and protective cover of an unmanned aerial vehicle according to an embodiment of this application;

[0049] Figure 2 This is a schematic diagram of the shaping ring of a parachute fully deployed relative to the protective cover, according to an embodiment of this application.

[0050] Figure 3 yes Figure 2 A schematic diagram showing the positional relationship between the stator ring (in its stowed state) and the rotor.

[0051] Figure 4 yes Figure 3 A schematic diagram of the shaping ring (unfolding process) shown;

[0052] Figure 5 yes Figure 3 A schematic diagram showing the positional relationship between the stator ring (fully deployed) and the rotor.

[0053] Figure 6 yes Figure 2-5 A schematic diagram of the shaping ring shown;

[0054] Figure 7 yes Figure 2 A schematic diagram of one embodiment of the parachute shown;

[0055] Figure 8 yes Figure 7 A schematic diagram showing the parachute fully deployed;

[0056] Figure 9 yes Figure 7 A schematic diagram of the windbreak section at the top of the parachute body shown;

[0057] Figure 10 yes Figure 2 A schematic diagram of one embodiment of the parachute shown;

[0058] Figure 11 yes Figure 10 A schematic diagram showing the parachute fully deployed;

[0059] Figure 12 yes Figure 2 A schematic diagram of one embodiment of the parachute shown;

[0060] Figure 13 yes Figure 12 A schematic diagram of the parachute's canopy shown;

[0061] Figure 14 yes Figure 2 A schematic diagram of the canopy of one embodiment of the parachute shown;

[0062] Figure 15 yes Figure 14 A schematic diagram of one embodiment of the inner liner of the parachute shown;

[0063] Figure 16 yes Figure 12-15 A schematic diagram of the one-way valve structure of the parachute shown;

[0064] Figure 17 yes Figure 16 A schematic diagram of cross-section AA of one embodiment of the one-way valve structure shown;

[0065] Figure 18 yes Figure 16 The diagram shows a schematic cross-section AA of one embodiment of the one-way valve structure shown.

[0066] The meanings of the reference numerals in the attached figures are as follows:

[0067] 100. Parachute; 200. Rotor; 300. Protective shield; 400. Fuselage;

[0068] 1. Shaping ring; 11. Movable joint; 12. Arc-shaped unit; 2. Umbrella body; 3. First suspension rope; 4. Through hole; 5. Windproof structure; 51. Windproof part; 511. Windproof awning; 52. Windproof plate; 53. Inner liner; 531. Anchor point; 532. Inner liner body; 533. Air-gathering surface; 534. Air inlet; 535. One-way valve structure; 535a. Pipe section; 535b. Deformation section; 535c. Flexible section; 535d. Elastic wall part; 535e. Flexible wall part; 535f. Magnetic component; 6. Suspension rope; 61. Main rope section; 62. Branch rope section; 63. Inner suspension rope group; 64. Outer suspension rope group; 7. Positioning structure; 71. Positioning sticker. Detailed Implementation

[0069] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0070] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0071] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0072] In a first aspect, this invention provides a parachute 100 for use in unmanned aerial vehicles, such as... Figures 1-5As shown, the unmanned aerial vehicle includes a fuselage 400, multiple rotors 200, and a protective shield 300. The rotors 200 are arranged around the fuselage 400. When the rotors 200 are in operation, they generate airflow, which enables the unmanned aerial vehicle to obtain lift and forward and backward thrust. The rotors 200 are located inside the protective shield 300, which is equipped with a ventilation structure. The ventilation structure allows the airflow generated by the rotors 200 to pass smoothly through the interior of the protective shield 300, thus ensuring the flight stability of the unmanned aerial vehicle.

[0073] The parachute 100 includes a shaping ring 1 and a parachute body 2. The shaping ring 1 can be fully unfolded outside the protective cover 300, or it can be folded and stored inside the protective cover 300 in one or more loops. The lower edge of the parachute body 2 is fitted around the outer periphery of the shaping ring 1. The parachute body 2 is connected to the protective cover 300 in the circumferential direction by multiple first suspension ropes 3. The first suspension ropes 3 are also evenly distributed in the circumferential direction of the protective cover 300. The parachute body 2 is provided with at least one through hole 4 and a windproof structure 5 for limiting the air intake of the through hole 4.

[0074] When the unmanned aerial vehicle crashes, the airflow will cause the shaping ring 1 and the canopy body 2 of the parachute 100 to detach from the protective cover 300. The shaping ring 1 will return to its original shape and unfold under its own elastic force, and open the lower edge of the canopy body 2. At the same time, the windproof structure 5 on the canopy body 2 will block the through hole 4 under the action of the airflow to limit the air intake area of ​​the through hole 4. The canopy body 2 and the windproof structure 5 will form a pocket shape to catch the airflow.

[0075] In the prior art, most drones' parachutes 100 have their parachute bodies connected to multiple suspension ropes 6, and the ends of these multiple suspension ropes 6 are gathered on a main suspension rope 6, which is then connected to the drone's fuselage 400. With this connection method, the deployed volume of the parachute 100 is relatively small.

[0076] like Figure 5 As shown, the outer contour of the fully unfolded shaping ring 1 is larger than the outer contour of the protective cover 300, resulting in a larger unfolded size of the lower edge of the parachute 2. Compared with the way the parachute 100 of most drones in the prior art is connected to its fuselage 400, the unfolded volume of this parachute 100 (parachute 2 and windproof structure 5) is larger, which can hold more air and create greater resistance with the airflow, thus effectively slowing down the drone when it falls. Therefore, this parachute 100 has a stronger load-bearing capacity.

[0077] When the parachute 100 is not in use, the parachute body 2 and the shaping ring 1 can be folded and stored inside the protective cover 300. However, the through hole 4 on the parachute body 2 remains open, and the through hole 4 and the inner ring of the folded shaping ring 1 are connected vertically to the ventilation structure of the protective cover 300. This allows the airflow generated when the rotor 200 is running to pass smoothly through the ventilation structure of the protective cover 300, the inside of the shaping ring 1, and the through hole 4 on the parachute body 2, thereby ensuring the flight stability of the unmanned aerial vehicle and effectively improving the payload capacity of the unmanned aerial vehicle.

[0078] The rotor 200 is located inside the protective cover 300, and the shaping ring 1 can be folded and stored inside the protective cover 300 in one or more turns.

[0079] When the shaping ring 1 is folded in a circle, as follows: Figure 6 As shown, multiple movable joints 11 on the shaping ring 1 approach the center of the shaping ring 1, and each arc-shaped unit 12 on the shaping ring 1 undergoes a large degree of bending, forming a petal shape.

[0080] When the shaping ring 1 is folded in multiple turns (two or more turns), the folding method can be to twist the shaping ring 1 to form multiple small turns.

[0081] The folding method is adapted to the shaping ring 1. When the unmanned aerial vehicle is in flight, the rotor 200 will generate a strong and rapid airflow, which makes the amount of air flowing through the through hole 4 per unit time relatively large. This requires that the opening area of ​​the through hole 4 cannot be too small.

[0082] Meanwhile, when the umbrella body 2 is completely folded and stored inside the protective cover 300, the windproof structure 5 can avoid the through hole 4 on the umbrella body 2 and be folded synchronously with the umbrella body 2, so that the windproof part 51 cannot obstruct the airflow flowing through the through hole 4.

[0083] Furthermore, when the unmanned aerial vehicle (UAV) crashes due to sudden situations such as power system failure, signal loss, or extreme weather interference, the windproof structure 5 on the canopy 2 can simultaneously and effectively block the through hole 4 on the canopy 2 when the shaping ring 1 opens the lower edge of the canopy 2. This reduces the air intake area of ​​the through hole 4 or completely blocks the through hole 4, so that when the UAV crashes, the airflow can generate greater resistance to the windproof structure 5 and the canopy 2, thereby effectively slowing down the UAV.

[0084] Based on this, such as Figures 7-11As shown, a through hole 4 is provided at the top of the umbrella body 2. The windproof structure 5 includes a windproof part 51 disposed at the through hole 4. The number of windproof parts 51 is one or more. When there are multiple windproof parts 51, the windproof parts 51 are evenly distributed around the hole edge of the through hole 4. The end of the windproof part 51 is connected to the fuselage 400 of the unmanned aerial vehicle via a suspension rope 6. Furthermore, the umbrella body 2 is configured to be able to move axially relative to the suspension rope 6 and the first suspension rope 3 when subjected to air resistance, and to bend the windproof part 51 in coordination with the pulling of the suspension rope 6 to form the top of the umbrella body 2 and block the through hole 4.

[0085] After the shaping ring 1 is released from the restriction of the protective cover 300, it will unfold and open the lower edge of the umbrella body 2. The airflow can enter the interior of the umbrella body 2 from the lower edge of the umbrella body 2 and blow the sides of the umbrella body 2. At the same time, a strong resistance will be formed between the airflow and the umbrella body 2. This force will force the umbrella body 2 to move along the axis of the first suspension rope 3 / suspension rope 6 in a direction away from the protective cover 300 of the UAV (this direction is upward when the UAV crashes). During the movement, the umbrella body 2 will press the windproof part 51, so that the end of the windproof part 51 connected to the umbrella body 2 will follow the umbrella body 2 away from the protective cover 300. Under the pull of the suspension rope 6, the end of the windproof part 51 will maintain a constant distance from the protective cover 300, thereby causing the windproof part 51 to bend and block the through hole 4.

[0086] In this way, under the combined action of the airflow and the suspension rope 6, the windproof part 51 forms the top of the parachute 2, so that the parachute 100 can catch the airflow. The airflow can generate a large resistance on the windproof structure 5 and the parachute 2. This force will effectively decelerate the unmanned aerial vehicle when it falls.

[0087] Furthermore, there will be a gap between the windshield 51 and the edge of the through hole 4, which cannot be sealed. Some turbulent airflow will pass through this gap, which can effectively prevent turbulent airflow from accumulating at the top of the canopy and forming high pressure, causing uneven inflation, tipping, swaying, spinning, etc. of the canopy 2, as well as suppressing the self-spinning or swaying of the canopy 2, thereby ensuring that the unmanned aerial vehicle is safer when decelerating and landing.

[0088] When the number of windbreaks 51 is one, the number of through holes 4 can be one or more.

[0089] When there are multiple through holes 4, a windproof part 51 can cover these multiple through holes 4 at the same time.

[0090] The formation of one or more through holes 4 at the top of the parachute 2 can be achieved by sewing the parachute body 2 with only fabric or other structures at the beginning of the manufacturing of the parachute 100, with the top and bottom of the parachute body 2 being hollowed out; or by sewing the parachute body and the top of the parachute with fabric or other structures at the same time, and then making a hole in the top of the parachute as a through hole 4; the windproof part 51 at the edge of the through hole 4 can be formed at the same time when sewing the parachute body, or it can be sewn on at the through hole 4 later.

[0091] The suspension rope 6 is configured to pass through the inside of the umbrella body 2 or be close to the side of the umbrella body 2.

[0092] Optionally, when manufacturing the umbrella body 2, holes are pre-drilled inside the umbrella body 2. After the umbrella body 2 is completed, the hanging rope 6 is threaded through the pre-drilled holes inside the umbrella body 2. Alternatively, before sewing the umbrella body 2, the hanging rope 6 can be placed inside the fabric or other structure used to make the umbrella body 2. After the umbrella body 2 is completed, the hanging rope 6 remains inside the umbrella body 2.

[0093] Alternatively, a positioning structure 7 can be installed on the side of the umbrella body 2, and the suspension rope 6 can be threaded through the positioning structure 7.

[0094] The suspension rope 6 can be set independently of the first suspension rope 3, or the suspension rope 6 can be one of the first suspension ropes 3.

[0095] In one embodiment, such as Figures 7-9 As shown, when there are multiple windbreaks 51, the windbreaks 51 are evenly distributed in the circumferential direction of the through hole 4. The suspension rope 6 is set on the outside of the umbrella body 2. The suspension rope 6 includes a main rope segment 61 and multiple branch rope segments 62 that are connected to the main rope segment 61. The end of the main rope segment 61 is configured to connect to the fuselage 400 of the unmanned aerial vehicle. One branch rope segment 62 is connected to the end of one windbreak 51.

[0096] When the UAV falls, the suspension rope 6, the multiple first suspension ropes 3, and the fuselage 400 of the UAV maintain the same falling speed. However, the parachute 2 is affected by air resistance and will move upward relative to the fuselage 400 and along the axis of the first suspension rope 3. This causes the section of the windproof part 51 connected to the parachute 2 to move upward synchronously. However, since the end of the windproof part 51 is connected to the suspension rope 6, the suspension rope 6 will pull the windproof part 51, causing it to bend horizontally. In this way, the multiple windproof parts 51 will block the through hole 4. These multiple windproof parts 51 form the top of the parachute 2, which can catch the airflow and slow down the falling speed of the UAV.

[0097] There is a gap between any two adjacent windbreaks 51. This gap can allow some of the turbulent airflow to pass through, making the unmanned aerial vehicle more stable during deceleration and descent. However, at the same time, the airflow will also widen this gap, making it impossible for the windbreaks 51 to effectively block the through-holes 4. This prevents the parachute 100 from holding the air and from creating significant resistance with the airflow, which can easily affect the deceleration and descent of the unmanned aerial vehicle.

[0098] To address this, the windproof section 51 is provided with a windproof awning 511. The windproof awning 511 is set along the outline of the windproof section 51 at its edge, and the windproof awning 511 is disconnected at the position where the windproof section 51 connects to the through hole 4. When the windproof section 51 is bent to form the top of the parachute 2, the windproof awnings 511 on two adjacent windproof sections 51 can prevent the airflow from further widening the gap between them, thereby ensuring that the windproof section 51 can effectively block the through hole 4, so that the parachute 100 can catch the air and effectively form a large resistance with the airflow, thereby ensuring effective deceleration of the unmanned aerial vehicle when it falls.

[0099] The windbreak 511 can be formed by sewing a thicker strip of cloth or other structures along the outer contour of the windbreak 51, or by forming the windbreak 51 at the edge of the windbreak 51 while using a structure such as cloth to make the windbreak 51.

[0100] In one embodiment, such as Figures 10-11 As shown, when there are multiple windproof parts 51, the windproof parts 51 are evenly distributed in the circumferential direction of the through hole 4, and there are multiple hanging ropes 6, which are connected to the windproof parts 51 one by one. The hanging ropes 6 can be set to pass through the interior of the umbrella body 2 or be close to the side of the umbrella body 2. A hanging rope 6 and its corresponding windproof part 51 are spaced apart from each other in the radial direction of the umbrella body 2.

[0101] When the UAV falls, the multiple suspending ropes 6, the multiple first suspending ropes 3, and the fuselage 400 of the UAV maintain the same falling speed. However, due to air resistance, the parachute 2 will move upward relative to the fuselage 400 and along the axis of the first suspending ropes 3 and 6. This causes the section of the windproof part 51 connected to the parachute 2 to move upward synchronously. However, since the end of the windproof part 51 is connected to the suspending rope 6, the suspending rope 6 will pull the windproof part 51, causing it to bend horizontally. In this way, the multiple windproof parts 51 will block the through hole 4. These multiple windproof parts 51 form the top of the parachute 2, which can catch the airflow and slow down the falling speed of the UAV.

[0102] Specifically, the multiple suspension ropes 6 are divided into an inner suspension rope group 63 and an outer suspension rope group 64. The inner suspension rope group 63 is connected to the inner side of the umbrella body 2, and the suspension ropes 6 of the inner suspension rope group 63 are arranged to cross each other. The outer suspension rope group 64 is connected to the outer side of the umbrella body 2, and the suspension ropes 6 of the outer suspension rope group 64 are arranged to cross each other.

[0103] In this way, the multiple wind-blocking parts 51 connected to the inner suspension rope group 63 will first block the through hole 4, and the multiple wind-blocking parts 51 connected to the outer suspension rope group 64 will then block the unblocked part of the through hole 4. These two groups of wind-blocking parts 51 are stacked in layers, which can effectively limit the air intake area of ​​the through hole 4. The umbrella top and umbrella body 2 composed of wind-blocking parts 51 in this form have a strong ability to trap air and can also form a large resistance with the airflow to effectively slow down the fall speed of the unmanned aerial vehicle.

[0104] Preferably, the inner suspension rope group 63 includes two or three suspension ropes 6, and the outer suspension rope group 64 includes two or three suspension ropes 6. The number of suspension ropes 6 in the inner suspension rope group 63 may be the same as or different from the number of suspension ropes 6 in the outer suspension rope group 64. For example, two inner suspension ropes 6 and two outer suspension ropes 6 can be selected, that is, the parachute 100 adopts a "two inner-two outer" arrangement of suspension ropes 6.

[0105] In this embodiment, the way the suspension rope 6 is threaded inside the umbrella body 2 and is close to the inner and outer sides of the umbrella body 2 can be the manner described above.

[0106] If the umbrella body 2 is provided with a number of positioning structures 7 corresponding to the number of suspension ropes 6, one suspension rope 6 is connected to one positioning structure 7. The positioning structure 7 can restrict the position of the suspension rope 6 to prevent it from detaching from the umbrella body 2. The positioning structure 7 allows the umbrella body 2 to move axially relative to the suspension rope 6 under the action of airflow, so that under the pressure of the umbrella body 2 and the pull of the suspension rope 6, the windproof part 51 can smoothly turn horizontally and block the through hole 4.

[0107] Optionally, the positioning structure 7 includes positioning stickers 71, each positioning sticker 71 having a threading hole defined on the side of the umbrella body 2, and the suspension rope 6 being threaded through the threading hole in a corresponding manner, the threading hole allowing the umbrella body 2 to move axially relative to the suspension rope 6.

[0108] In addition, the positioning structure 7 can also use existing common components that have the above functions, such as positioning rings.

[0109] The number of slings 6 and the first sling 3 are equal. The first sling 3 is configured as sling 6, which connects the parachute body 2 and the windproof part 51 at the same time. This eliminates the need for an additional independent sling 6 structure, simplifies the overall structure of the parachute 100, reduces the number of parts, avoids redundant components, reduces assembly complexity and manufacturing costs, and also reduces the risk of tangling and interference of the sling 6, improving the convenience of storage.

[0110] Based on the folding method of the shaping ring 1, multiple through holes 4 can be opened on the side of the umbrella body 2. The multiple through holes 4 are evenly distributed in the circumferential direction of the umbrella body 2. When the umbrella body 2 is folded and stored inside the protective cover 300, at least one through hole 4 remains open and is vertically connected to the shaping ring 1 so as to allow the airflow generated when the rotor 200 is running to flow smoothly without affecting the flight stability of the unmanned aerial vehicle. The windproof structure 5 includes multiple windproof plates 52. One or more windproof plates 52 are connected to the lower edge of a through hole 4. The windproof plates 52 can block or cover the through hole 4 under the action of airflow.

[0111] After the shaping ring 1 is released from the restriction of the protective cover 300, it unfolds and opens the lower edge of the parachute 2. Airflow can enter the interior of the parachute 2 from the lower edge of the parachute 2, blowing the sides of the parachute 2. At the same time, the wind deflector 52 is also blown up by the airflow, covering the through hole 4 to prevent the airflow from passing through the through hole 4. This allows the parachute 100 to catch the airflow, which will create a large drag on the parachute 100, thus effectively slowing down the unmanned aerial vehicle when it falls.

[0112] When the umbrella body 2 is deployed under the influence of the shaping ring 1 and the airflow, each through hole 4 has one or more wind deflectors 52 that are affected by the airflow and covered by it. The multiple through holes 4 are evenly distributed at intervals on the outer periphery of the umbrella body 2. In this way, the airflow and resistance values ​​in each area of ​​the umbrella body 2 tend to be consistent, avoiding the umbrella body 2 from swaying, spinning or shaking due to uneven local pressure difference. This significantly improves the attitude stability during the descent process and ensures that the descent trajectory is straight and controllable.

[0113] The wind deflector 52 can automatically adjust the degree of coverage of the through hole 4 according to the airflow intensity. When the airflow is strong in the early stage of descent, the wind deflector 52 is fully covered by the airflow to maximize the use of the canopy area of ​​the parachute 100 to provide deceleration drag. When the airflow weakens, the degree of coverage of the wind deflector 52 on the through hole 4 is reduced, and some airflow can be discharged through the through hole 4 to avoid the parachute 2 from violent shaking or overload due to excessive drag.

[0114] In one embodiment, such as Figures 12-15 As shown, the side of the umbrella body 2 has an odd number of through holes 4, such as 3 through holes 4. When the umbrella body 2 and the shaping ring 1 are folded together and stored in the protective cover 300, one of the through holes 4 can remain open and connected to the shaping ring 1. The remaining through holes 4 are hidden when the umbrella body 2 is folded. In this way, the shape of the folded umbrella body 2 is irregular. However, since the umbrella body 2 is made of a light and soft material, when it is stored inside the protective cover 300, even if it is not symmetrical with respect to the center of gravity of the UAV, it will not affect the flight attitude of the UAV or the flight stability of the UAV.

[0115] In one embodiment, the side of the umbrella body 2 is provided with an even number of through holes 4, such as two through holes 4 or four through holes 4. These through holes 4 are paired up. When the umbrella body 2 is folded and stored inside the protective cover 300, one pair of through holes 4 remains open to allow the airflow generated when the rotor 200 is running to flow smoothly.

[0116] In this embodiment, the shaping ring 1 and the umbrella body 2 can be twisted in a cross shape so that the two pairs of through holes 4 are stacked one on top of the other. The shape of the umbrella body 2 after folding is relatively regular, and the two through holes 4 remain open. When the umbrella body 2 is stored inside the protective cover 300, the overall appearance of the unmanned aerial vehicle is more beautiful, and the flight stability of the unmanned aerial vehicle can be guaranteed.

[0117] When the rotor 200 is in operation, it will generate a relatively rapid airflow, which requires that the area of ​​the open through-hole 4 be large enough when the canopy 2 is folded.

[0118] Each rotor 200 has a pre-set ventilation area. The opening area of ​​any one through hole 4 is greater than or equal to the sum of the ventilation areas of multiple rotors 200. In this way, after the canopy 2 is folded, the pair of open through holes 4 allow the airflow at the rotor 200 to pass through and be discharged without obstruction, so as not to affect the flight stability of the unmanned aerial vehicle.

[0119] Based on this, the area of ​​the wind deflector 52 is larger than the opening area of ​​the through hole 4, making it easier to be pushed and fit into the position of the through hole 4 under the action of airflow. This reduces the possibility of the wind deflector 52 shifting, flipping, or not fully covering due to airflow fluctuations, ensuring that the through hole 4 is always in an effective shielding state under the design conditions. Under the action of airflow, the wind deflector 52 can completely shield the through hole 4, preventing a large amount of airflow from being lost from the through hole 4. This ensures the effective wind-receiving area of ​​the wind deflector 52 and ensures a stable and reliable descent deceleration effect.

[0120] Optionally, the shape of the windshield 52 includes an ellipse, a circle and its approximations, a rectangle and its approximations, and a triangle and its approximations; wherein, the approximation of a circle is a closed figure formed by arbitrarily arranging straight line segments and / or curved line segments; the approximation of a rectangle is a closed figure formed by arbitrarily arranging straight line segments and / or curved line segments; and the approximation of a triangle is a closed figure formed by arbitrarily arranging straight line segments and / or curved line segments.

[0121] In one embodiment, the side of the umbrella body 2 is provided with at least a pair of through holes 4. The two pairs of through holes 4 are arranged in a corresponding manner along the folding direction of the umbrella body 2, so that when the umbrella body 2 is folded and stored inside the protective cover 300, one pair of through holes 4 remains open to allow the airflow generated when the rotor 200 is running to flow smoothly, so as to ensure the flight stability of the unmanned aerial vehicle.

[0122] The windproof structure 5 includes an inner liner 53, which has multiple anchoring points 531 spaced apart in the circumferential direction. The inner liner 53 is connected to the shaping ring 1 or the umbrella body 2 via the anchoring points 531. The inner liner 53 can unfold into an umbrella shape under the action of airflow and completely block the through hole 4.

[0123] When the canopy 2 is folded, the inner liner 53 will avoid the through hole 4 and fold together with the canopy 2. The inner liner 53 will not affect the airflow through the through hole 4. The material of the inner liner 53 can be the same as that of the canopy 2, or it can be other soft materials. In this way, when the canopy 2 is unfolded, the inner liner 53 can be fully unfolded under the action of the airflow, completely blocking the through hole 4. The inner liner 53 can hold the air, and the airflow can generate greater resistance to it, thereby slowing down the speed of the unmanned aerial vehicle's fall.

[0124] During flight, unmanned aerial vehicles (UAVs) may crash due to unforeseen circumstances such as power failure, control system malfunction, or signal loss. UAVs may crash into complex environments such as hard surfaces, buildings, lawns, farmland, water surfaces, and pools.

[0125] When unmanned aerial vehicles crash into pools or other bodies of water, they sink to the bottom, making salvage difficult and recovery costs high.

[0126] In this regard, the inner liner 53 includes an inner liner body 532 and an air-gathering surface 533. The inner liner body 532 is housed inside the umbrella body 2. The air-gathering surface 533 is formed at the opening of the inner liner body 532 and closes the inner liner body 532. An air inlet 534 is provided on the air inlet 533. A one-way valve structure 535 is provided at the air inlet 534, and the body is placed inside the inner liner body 532. The air-gathering surface 533 is used to guide the airflow to the air inlet 534, so that the airflow enters the interior of the inner liner body 532 through the one-way valve structure 535. The one-way valve structure 535 is used to restrict the outflow of airflow inside the inner liner body 532.

[0127] When the unmanned aerial vehicle (UAV) falls, it gains a high speed, causing the air pressure flowing through the air inlet 534 to be greater than the air pressure inside the inner liner body 532. The external air pressure will push open the one-way valve structure 535 and enter the interior of the inner liner body 532, filling it and causing it to bulge. After the inner liner body 532 bulges, the external air resistance is greater, which can effectively slow down the falling speed of the UAV.

[0128] Outside air continuously enters the inner liner body 532 until the air pressure inside the inner liner body 532 is the same as the outside air pressure, at which point outside air will no longer enter the inner liner body 532.

[0129] When the air pressure inside the inner tank 532 is greater than the external air pressure, the one-way valve structure 535 will close under the air pressure inside the inner tank 532. Thus, when the unmanned aerial vehicle crashes into a pool or other body of water, the air pressure inside the inner tank 532 will be stronger than the external air pressure, and the one-way valve structure 535 will be firmly closed. The air inside the inner tank 532 will not escape from the one-way valve structure 535 to the outside of the inner tank 532, and the inner tank 532 will still be inflated. In this way, a large buoyancy will be generated between the inner tank 532 and the water surface, so that the unmanned aerial vehicle will not sink, which facilitates the salvage by personnel.

[0130] like Figures 16-18 As shown, the one-way valve structure 535 includes a pipe section 535a, a deformation section 535b, and a flexible section 535c connected in sequence. The pipe section 535a is connected to the air inlet 534. When the external air pressure is greater than the air pressure inside the inner liner body 532, the deformation section 535b will open under the impact of the external air pressure. When the air pressure inside the inner liner body 532 is greater than the external air pressure, the deformation section 535b will close under the action of the air pressure inside the inner liner body 532.

[0131] The flexible section 535c possesses excellent flexibility and deformation capabilities. On the one hand, when the deformable section 535b opens due to external air pressure, the flexible section 535c bends flexibly in sync with the deformable section 535b, avoiding stress concentration and ensuring smooth opening of the one-way valve structure 535 and stable airflow into the inner liner body 532. On the other hand, when the air pressure in the inner liner body 532 is greater than the external air pressure, the deformable section 535b closes, and the flexible section 535c can adaptively fit the deformable section 535b, assisting in sealing, enhancing closure reliability, and preventing reverse gas leakage. At the same time, the flexible section 535c can buffer the impact caused by air pressure fluctuations, improving the sensitivity and service life of the one-way valve structure 535.

[0132] Specifically, the deformation section 535b includes two elastic wall portions 535d arranged opposite each other. In its natural state, the two elastic wall portions 535d are in a close-fitting state. The so-called natural state means that the two elastic wall portions 535d are only subjected to gravity and no other force. In this state, the two elastic wall portions 535d are close to each other. When the external air pressure is greater than the air pressure inside the inner liner body 532, the two elastic wall portions 535d will be opened by the impact of the external air pressure.

[0133] Alternatively, the deformation section 535b includes two flexible wall portions 535e arranged opposite each other. Each flexible wall portion 535e is provided with a magnetic element 535f. The two magnetic elements 535f can attract each other so that the two flexible wall portions 535e fit together. When the external air pressure is greater than the air pressure inside the inner liner body 532, the two magnetic elements 535f will be impacted by the external air pressure and move away from each other so that the two flexible wall portions 535e open up relative to each other.

[0134] like Figure 6 As shown, the shaping ring 1 is a ring that can be deformed and can recover its shape without external force.

[0135] This invention adds a shaping ring 1, which is designed to be deformable under force and self-restored without external force. This allows the shaping ring 1 to deform smoothly when squeezed and folded by external force, significantly reducing its overall volume and facilitating quick folding and storage within the protective cover 300. This effectively reduces the storage space required and is suitable for installations in confined spaces such as those occupied by unmanned aerial vehicles. After the external force is released, such as when the shaping ring 1 is removed from the protective cover 300, the shaping ring 1 can automatically restore its original ring shape based on its own properties. The umbrella body 2 can be quickly and neatly unfolded without the need for an additional driving structure, resulting in rapid unfolding response and strong structural stability.

[0136] Meanwhile, the setting of the shaping ring 1 can eliminate the need for additional opening and closing drive components, simplify the overall structure, reduce assembly difficulty and manufacturing costs, and can be repeatedly folded, deformed and reset for use. It has good fatigue resistance and effectively improves the reliability and service life of the parachute 100.

[0137] The shaping ring 1 is made of one or more materials, including plastic, glass fiber, carbon fiber and metal, allowing for flexible material selection to meet different usage needs.

[0138] The shaping ring 1, made of the above-mentioned material, has both excellent structural strength and elastic deformation capability. It is not easy to break or crack when folded under pressure. The deformation is smooth and stable. After resetting, it can accurately restore the original ring contour, support the umbrella body 2 to unfold smoothly, and provide sufficient support.

[0139] At the same time, the weight of various materials is controllable, which can balance lightweight and structural rigidity, thereby reducing the overall weight of the parachute 100 and reducing the flight load of the unmanned aerial vehicle.

[0140] In one embodiment, the shaping ring 1 is provided with a plurality of movable joints 11, which are evenly distributed along the circumferential interval of the shaping ring 1, and the plurality of movable joints 11 divide the shaping ring 1 into multiple arc-shaped units 12.

[0141] The shaping ring 1 can be folded and stored inside the protective cover 300 in one or more loops.

[0142] When the shaping ring 1 is folded in a circle, the multiple movable joints 11 on the shaping ring 1 approach the center of the shaping ring 1, and each arc-shaped unit 12 on the shaping ring 1 is bent to a large extent, forming a petal shape.

[0143] When the shaping ring 1 is folded in multiple turns (two or more turns), the folding method can be to twist the shaping ring 1 to form multiple small turns.

[0144] In a second aspect, the present invention also proposes an unmanned aerial vehicle, including a plurality of rotors 200, a protective cover 300, and a parachute 100 as described in the first aspect. The protective cover 300 is provided with a ventilation structure, which allows the airflow generated when the rotors 200 are operating to flow smoothly through the interior of the protective cover 300. Since the unmanned aerial vehicle uses the parachute 100 described above, it should also have the technical effects of the parachute 100 described above.

[0145] Specifically, the ventilation structure of the protective cover 300 can be formed by the hollow area on the protective cover 300, or the ventilation holes on the protective cover 300 can serve as the ventilation structure.

[0146] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A parachute for use in an unmanned aerial vehicle, the unmanned aerial vehicle comprising a plurality of rotors (200) and a protective shield (300), the rotors (200) being disposed within the protective shield (300); Its features are, The parachute (100) includes: A shaping ring (1) that can be fully unfolded outside the protective cover (300) and folded into the protective cover (300) in one or more loops; And the umbrella body (2), the lower edge of the umbrella body (2) is fitted around the outer periphery of the shaping ring (1), the umbrella body (2) is connected to the protective cover (300) in the circumferential direction by multiple first hanging ropes (3), the umbrella body (2) is provided with at least one through hole (4) and a windproof structure (5) for limiting the air intake of the through hole (4). When the umbrella body (2) is unfolded outside the protective cover (300), the windproof structure (5) will block the through hole (4) to limit the air intake area of ​​the through hole (4); When the umbrella body (2) is folded and stored inside the protective cover (300), the through hole (4) remains open, allowing the airflow generated when the rotor (200) is operating to pass smoothly through its interior.

2. The parachute according to claim 1, characterized in that, The top of the umbrella body (2) is provided with the through hole (4), and the windproof structure (5) includes a windproof part (51) provided at the through hole (4). The number of windproof parts (51) is one or more, and the end of the windproof part (51) is connected to the fuselage (400) of the unmanned aerial vehicle via a suspension rope (6). The umbrella body (2) is configured to move axially relative to the suspension rope (6) and the first suspension rope (3) when subjected to air resistance, and in conjunction with the pulling of the suspension rope (6), the windproof part (51) is made to bend horizontally and bend to block the through hole (4).

3. The parachute according to claim 2, characterized in that, When the number of the windproof parts (51) is one, the hanging rope (6) is set to pass through the interior of the umbrella body (2) or adjacent to the side of the umbrella body (2); Furthermore, the hoisting rope (6) is set independently of the first hoisting rope (3), or the hoisting rope (6) is one of the first hoisting ropes (3).

4. The parachute according to claim 2, characterized in that, When there are multiple windbreaks (51), the windbreaks (51) are evenly distributed in the circumferential direction of the through hole (4). The suspension rope (6) is set outside the umbrella body (2). The suspension rope (6) includes a main rope segment (61) and multiple branch rope segments (62) that are connected to the main rope segment (61). The end of the main rope segment (61) is configured to be connected to the fuselage (400). One branch rope segment (62) is connected to the end of one windbreak (51).

5. The parachute according to claim 2 or 4, characterized in that, The windproof part (51) is provided with a windproof awning (511). The windproof awning (511) is provided along the outline shape of the windproof part (51) at the edge of the windproof part (51), and the windproof awning (511) is disconnected at the position where the windproof part (51) connects to the through hole (4). When the windproof part (51) is bent and forms the umbrella top of the umbrella body (2), the windproof awnings (511) on two adjacent windproof parts (51) can prevent the airflow from widening the gap between them.

6. The parachute according to claim 2, characterized in that, When there are multiple windbreaks (51), the windbreaks (51) are evenly distributed in the circumferential direction of the through hole (4); There are multiple suspension ropes (6), and each one is connected to the windproof part (51) in a corresponding manner; The suspension rope (6) is configured to pass through the interior of the umbrella body (2) or adjacent to the side of the umbrella body (2), and one suspension rope (6) and the corresponding windproof part (51) are spaced apart from each other in the radial direction of the umbrella body (2).

7. The parachute according to claim 6, characterized in that, The multiple hanging ropes (6) are divided into an inner hanging rope group (63) and an outer hanging rope group (64). The inner hanging rope group (63) is arranged next to the inner side of the umbrella body (2), and the hanging ropes of the inner hanging rope group (63) are arranged to cross each other. The outer hanging rope group (64) is arranged next to the outer side of the umbrella body (2), and the hanging ropes of the outer hanging rope group (64) are arranged to cross each other.

8. The parachute according to claim 6 or 7, characterized in that, The umbrella body (2) is provided with a number of positioning structures (7) corresponding to the suspension ropes (6). One suspension rope (6) is connected to one positioning structure (7). The positioning structure (7) allows the umbrella body (2) to move axially relative to the suspension ropes (6) under the action of airflow.

9. The parachute according to claim 8, characterized in that, The positioning structure (7) includes positioning stickers (71), each of which has a thread hole defined on the side of the umbrella body (2), and the hanging ropes (6) are threaded through the thread holes one by one.

10. The parachute according to claim 8, characterized in that, The number of the suspension rope (6) is equal to that of the first suspension rope (3), and the first suspension rope (3) is configured as the suspension rope (6).

11. The parachute according to claim 1, characterized in that, The side of the parachute body (2) is provided with a plurality of through holes (4). The plurality of through holes (4) are evenly spaced in the circumferential direction of the parachute body (2). When the parachute body (2) is folded and stored inside the protective cover (300), at least one of the through holes (4) remains open and is connected vertically to the shaping ring (1) so that the parachute (100) allows the airflow generated when the rotor (200) is operating to flow smoothly. The windproof structure (5) includes a plurality of windproof plates (52), one or more of the windproof plates (52) are connected to the lower edge of a through hole (4), wherein the windproof plates (52) can block or cover the through hole (4) under the action of airflow.

12. The parachute according to claim 11, characterized in that, The side of the umbrella body (2) has an odd number of through holes (4).

13. The parachute according to claim 11, characterized in that, The umbrella body (2) has an even number of through holes (4) on its side. These through holes (4) are paired up. When the umbrella body (2) is folded and stored in the protective cover (300), one pair of through holes (4) remains open.

14. The parachute according to claim 11, characterized in that, Each rotor (200) has a pre-set ventilation area, and the opening area of ​​any one of the through holes (4) is greater than or equal to the sum of the ventilation areas of multiple rotors (200).

15. The parachute according to claim 11, characterized in that, The area of ​​the wind deflector (52) is larger than the opening area of ​​the through hole (4).

16. The parachute according to claim 11, characterized in that, The shape of the windshield (52) includes ellipse, circle and its approximate shape, rectangle and its approximate shape and triangle and its approximate shape; Wherein, the approximate shape of the circle is a closed figure formed by arbitrarily arranging straight line segments and / or curved line segments; The approximate shape of the rectangle is a closed figure formed by arbitrarily arranging straight line segments and / or curved line segments; The approximate shape of the triangle is a closed figure formed by arbitrarily arranging straight line segments and / or curved line segments.

17. The parachute according to claim 1, characterized in that, The side of the umbrella body (2) is provided with at least one pair of through holes (4), and the two pairs of through holes (4) are arranged in a corresponding manner along the folding direction of the umbrella body (2), so that when the umbrella body (2) is folded and stored inside the protective cover (300), the two pairs of through holes (4) remain open. The windproof structure (5) includes an inner liner (53). The opening of the inner liner (53) is provided with multiple anchor points (531) spaced apart in the circumferential direction. The inner liner (53) is connected to the shaping ring (1) or the umbrella body (2) through the anchor points (531). The inner liner (53) can be unfolded into an umbrella shape under the action of airflow and completely seal the through hole (4).

18. The parachute according to claim 17, characterized in that, The inner liner (53) includes an inner liner body (532) and an air-gathering surface (533). The inner liner body (532) is housed inside the umbrella body (2). The air-gathering surface (533) is formed at the opening of the inner liner body (532) and closes the inner liner body (532). An air inlet (534) is provided on the air-gathering surface (533). A one-way valve structure (535) is provided at the air inlet (534) and its body is placed inside the inner liner body (532). The air-gathering surface (533) is used to guide the airflow to the air inlet (534) and into the interior of the inner liner body (532) through the one-way valve structure (535). The one-way valve structure (535) is used to restrict the airflow out of the inner liner body (532).

19. The parachute according to claim 18, characterized in that, The one-way valve structure (535) includes a pipe section (535a), a deformation section (535b), and a flexible section (535c) connected in sequence. The pipe section (535a) is connected to the air inlet (534). When the external air pressure is greater than the air pressure inside the inner liner body (532), the deformation section (535b) will open under the impact of the external air pressure. When the air pressure inside the inner liner body (532) is greater than the external air pressure, the deformation section (535b) will close under the action of the air pressure inside the inner liner body (532).

20. The parachute according to claim 19, characterized in that, The deformation section (535b) includes two elastic wall portions (535d) arranged opposite to each other. The two elastic wall portions (535d) are in a closed state in their natural state. When the external air pressure is greater than the air pressure inside the inner liner body (532), the two elastic wall portions (535d) will be impacted by the external air pressure and open relative to each other. Alternatively, the deformable segment (535b) includes two oppositely arranged flexible wall portions (535e), each of which is provided with a magnetic element (535f). The two magnetic elements (535f) can attract each other so that the two flexible wall portions (535e) fit together. When the external air pressure is greater than the air pressure inside the inner liner body (532), the two magnetic elements (535f) will be impacted by the external air pressure and move away from each other so that the two flexible wall portions (535e) open relative to each other.

21. The parachute according to claim 1, characterized in that, The shaping ring (1) is a ring that can be driven to deform and can recover its own shape without external force.

22. The parachute according to claim 21, characterized in that, The shaping ring (1) is made of one or more of the following materials: plastic, glass fiber, carbon fiber and metal.

23. The parachute according to claim 21 or 22, characterized in that, The shaping ring (1) is provided with multiple movable joints (11), which are evenly distributed along the circumferential interval of the shaping ring (1) and divide the shaping ring (1) into multiple arc-shaped units (12).

24. An unmanned aerial vehicle, characterized in that, It includes multiple rotors (200), a protective shield (300) and a parachute (100) as claimed in any one of claims 1-23, wherein the protective shield (300) is provided with a ventilation structure that allows the airflow generated when the rotors (200) are in operation to flow smoothly through the interior of the protective shield (300).

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