A folding component and a multi-rotor drone

Abstract

The present invention belongs to the technical field of unmanned aerial vehicles, and particularly relates to a folding assembly and a multi-rotor unmanned aerial vehicle, including a folding main member, a folding auxiliary member and a locking structure. A rotating space is provided inside the folding main member, and a rotating opening communicating with the rotating space is provided on the side surface of the folding main member; the folding auxiliary member, a part of the folding auxiliary member extends into the folding main member and is rotatably connected to the folding main member, and the folding auxiliary member rotates in the rotating space along the rotating opening under the action of an external force; the locking structure, the locking structure is buckled at the rotating opening and abuts against the side surface of the folding auxiliary member to limit the horizontal rotation of the folding auxiliary member. The above-mentioned folding assembly has a simple structure and is convenient to operate, and can quickly realize the relative rotation between the folding main member and the folding auxiliary member, saving time and effort; the above-mentioned multi-rotor unmanned aerial vehicle realizes the folding of the arm through the folding assembly, with simple operation, saving time and effort, reducing the occupied space of the unmanned aerial vehicle, and being convenient for transportation and storage.

Description

Technical Field

[0001] The present invention relates to the technical field of drones, and particularly to a folding component and a multi-rotor drone. Background Art

[0002] A multi-rotor drone is a type of unmanned aerial vehicle, which includes a fuselage and a plurality of arms arranged around the fuselage. For easy storage and transportation, the arms are usually designed to be foldable. The arms are connected to the fuselage through a folding structure. When needed, the arms rotate relative to the fuselage through the folding structure and are in a folded state, reducing the volume of the entire drone. However, the existing folding structure is relatively complex, inconvenient to operate, time-consuming and laborious, and the user experience is poor. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides a folding component and a multi-rotor drone. The overall structure of the arm folding component is simple, and it can achieve quick locking or folding.

[0004] To achieve the above technical effects, the embodiments of the present invention adopt the following technical solutions:

[0005] In a first aspect, an embodiment of the present invention provides a folding component, including:

[0006] A folding main part, a rotation space is provided inside the folding main part, and a rotation opening communicating with the rotation space is provided on the side surface of the folding main part;

[0007] A folding sub-part, a part of the folding sub-part extends into the folding main part and is rotationally connected to the folding main part, and the folding sub-part rotates in the rotation space along the rotation opening under the action of an external force;

[0008] A locking structure, the locking structure is buckled at the rotation opening and abuts against the side surface of the folding sub-part to limit the horizontal rotation of the folding sub-part.

[0009] In the folding component provided by the embodiment of the present invention, the folding sub-part extends into the rotation space of the folding main part and is rotationally connected to the folding main part. The folding sub-part rotates around the folding main part along the rotation opening under the action of an external force. The locking structure can be buckled at the rotation opening and can limit the movement of the folding sub-part. When the locking structure is buckled at the rotation opening, even under the action of an external force, the folding sub-part cannot rotate relative to the rotation main part. Only by opening the locking structure and eliminating the locking effect of the locking structure on the folding sub-part can the folding sub-part move under the action of an external force.

[0010] As a preferred structure of the embodiment of the present invention, the folding main member includes a top plate, a bottom plate and a side plate. The top and bottom of the side plate are respectively connected to the top plate and the bottom plate, and a rotation space is formed between the top plate, the bottom plate and the side plate. The rotation opening is in an L shape, extending from one end of the side plate to the other side of the folding main member opposite to the side plate. The rotation opening includes a first rotation opening adjacent to the side plate and a second rotation opening opposite to the side plate. When the locking structure is fastened at the second rotation opening, the two sides of the folding sub-member are respectively in close contact with the locking structure and the side plate of the folding main member.

[0011] In a second aspect, the embodiment of the present invention further provides a multi-rotor unmanned aerial vehicle, including a fuselage, arms and a landing gear. There are multiple arms arranged around the fuselage, and the landing gear is fixed at the bottom of the fuselage. The multi-rotor unmanned aerial vehicle further includes the above-mentioned folding assembly. The arms are connected to the fuselage through the folding assembly. The folding assembly includes a folding main member, a folding sub-member and a locking structure. The folding sub-member is fixed at the end of the arm. The folding main member is fixedly connected to the fuselage. The folding sub-member extends into the folding main member and is rotatably connected to the folding main member. The locking structure restricts the horizontal rotation of the folding sub-member.

[0012] As a further improvement of the embodiment of the present invention, the multi-rotor unmanned aerial vehicle further includes a plurality of clips fixed on the fuselage. After the arms are rotated clockwise or counterclockwise in sequence towards the fuselage direction, the arms are clamped in the corresponding clips.

[0013] Adopting the above technical solutions, the following beneficial effects are included: The folding assembly provided by the embodiment of the present invention includes a folding main member, a folding sub-member and a locking structure. The locking structure can be fastened on the folding main member. When the locking structure is in an open state, the folding sub-member can be rotated around the folding main member under the action of an external force. When the locking structure is fastened on the folding main member, the folding sub-member can be locked, thereby restricting the movement of the folding sub-member. The above folding assembly has a simple structure and is convenient to operate, and can quickly realize the relative rotation between the folding main member and the folding sub-member, saving time and effort. In the multi-rotor unmanned aerial vehicle provided by the embodiment of the present invention, the arms are connected to the fuselage through the above folding assembly. The arms are fixedly connected to the folding sub-member, and the folding main member is fixedly connected to the fuselage. Since the folding sub-member can rotate relative to the folding main member, the arms can be rotated around the fuselage and folded and stored on the side of the fuselage. The locking structure is used to lock the arms when the arms are in an unfolded state. The above multi-rotor unmanned aerial vehicle realizes the folding of the arms through the folding assembly, with simple operation, time and effort saving, reducing the occupied space of the unmanned aerial vehicle, and being convenient for transportation and storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural view of the folding assembly provided by the embodiment of the present invention in a locked state;

[0015] Figure 2 It is a schematic structural diagram of the folding component provided by the embodiment of the present invention in the open state;

[0016] Figure 3 It is a schematic structural diagram of the folding component provided by the embodiment of the present invention in the stored state;

[0017] Figure 4 It is a cross-sectional view of the folding component provided by the embodiment of the present invention in the locked state;

[0018] Figure 5 It is a cross-sectional view of the folding component provided by the embodiment of the present invention in the stored state;

[0019] Figure 6 It is a schematic structural diagram of the main folding part provided by the embodiment of the present invention;

[0020] Figure 7 It is a schematic structural diagram of the auxiliary folding part provided by the embodiment of the present invention;

[0021] Figure 8 It is a schematic structural diagram of the lock provided by the embodiment of the present invention;

[0022] Figure 9 It is a schematic structural diagram of the spring buckle provided by the embodiment of the present invention.

[0023] In the figure:

[0024] 1. Main folding part; 1.1. Top plate; 1.11. First hook groove; 1.2. Bottom plate; 1.3. Side plate; 1.4. Rotating space; 2. Auxiliary folding part; 2.1. Groove; 3. Lock; 3.1. Accommodating groove; 3.2. Second hook part; 3.3. Storage groove; 3.4. Inclined part; 3.5. First connecting ear; 3.6. Bearing shaft part; 4. Lock handle; 4.1. Card slot; 4.2. Hand-held part; 5. First rotating shaft; 6. Second rotating shaft; 7. Upper inlay block; 7.1. Clamping part; 7.2. Arc-shaped positioning groove; 7.3. Arc-shaped transition surface; 8. Lower inlay block; 8.1. Second hook groove; 9. Fixed round shaft; 10. Spring buckle; 10.1. Pressing part; 10.2. Torsion spring; 10.3. First hook part; 11. Third rotating shaft;

[0025] 100. Airframe; 200. Arm; 300. Landing gear; 400. Clip. Detailed implementation manners

[0026] To make the objectives, technical solutions and advantages of the present invention more clear, the following will, in conjunction with the accompanying drawings in the embodiments of the present invention, clearly and completely describe the technical solutions in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0027] In the present invention, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit that the indicated devices, elements or components must have a specific orientation or be constructed and operated in a specific orientation.

[0028] Moreover, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0029] In addition, the terms "installed", "set", "provided with", "connected", "connected to", "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there is internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Unless otherwise specified, "a plurality of" means two or more.

[0031] The following will further describe the present invention in detail through specific embodiments in conjunction with the accompanying drawings.

[0032] Embodiment:

[0033] This embodiment provides a folding assembly. Referring to the figure, it includes a folding main part 1, a folding sub-part 2 and a locking structure: a rotating space 1.4 is provided inside the folding main part 1, and a rotating opening communicating with the rotating space 1.4 is provided on the side of the folding main part 1; a part of the folding sub-part 2 extends into the folding main part 1 and is rotatably connected to the folding main part 1. Preferably, the folding sub-part 2 and the folding main part 1 can be rotatably connected through a rotating shaft, and the rotating shaft vertically penetrates the folding main part 1 and the folding sub-part 2.

[0034] The folding accessory rotates within the rotation space along the rotation opening under the action of an external force. One end of the folding accessory is inserted into the rotation space of the folding main body through the rotation opening. The size of the rotation opening is larger than the width of the folding accessory, so as to leave room for the rotation of the folding accessory. The buckle structure is buckled at the rotation opening and closely abuts against the side surface of the folding accessory to limit the horizontal rotation of the folding accessory. When the buckle structure is buckled on the folding main body 1, the folding accessory 2 can be locked in the rotation space 1.4. Even under the action of an external force, it is difficult for the rotating accessory 2 to rotate around the rotating shaft. When the buckle structure is opened, the folding accessory 2 loses the locking effect of the buckle structure and can rotate around the rotating shaft along the rotation opening under the action of an external force, from one side of the rotation opening to the other side of the opening. In this embodiment, the folding accessory 2 rotates horizontally around the rotating shaft.

[0035] In this embodiment, preferably, the folding main body 1 includes a top plate 1.1, a bottom plate 1.2 and a side plate 1.3. The top and bottom of the side plate 1.3 are respectively connected to the top plate 1.1 and the bottom plate 1.2. The top plate 1.1 and the bottom plate 1.2 are both horizontal plate-like structures, and the side plate 1.3 is a vertical plate. The rotation space 1.4 is formed among the top plate 1.1, the bottom plate 1.2 and the side plate 1.3; the rotation opening is L-shaped, extending from one end of the side plate 1.3 to the other side of the folding main body 1 opposite to the side plate. The rotation opening includes a first rotation opening adjacent to the side plate and a second rotation opening opposite to the side plate; one end of the folding accessory 2 extends into the rotation space through the first rotation opening and is rotatably connected to the folding main body. When the buckle structure is buckled at the second rotation opening, the two side surfaces of the folding accessory are respectively in close contact with the buckle structure and the side plate of the folding main body, and the buckle structure locks the folding accessory in the first rotation opening. When folding is required, the buckle structure is opened, and the folding accessory is horizontally rotated from the first rotation opening to the second rotation opening. The operation is convenient and fast, and no special tool is required.

[0036] In this embodiment, the provided buckle structure includes a buckle 3 and a buckle handle 4. One end of the buckle 3 is rotatably connected to the bottom plate 1.2 of the folding main member 1, and the other end is rotatably connected to the buckle handle 4. The inner side of the buckle closely abuts against the side surface of the folding sub-member 2, and the buckle handle 4 is tightly fastened to the top plate 1.1 of the folding main member 1. Further, the buckle structure further includes upper inlay blocks 7 and lower inlay blocks 8 respectively located on the top plate 1.1 and the bottom plate 1.2 of the folding main member. Optionally, the upper inlay blocks 7 and the lower inlay blocks 8 can be fixed to the corresponding top plate 1.1 and the bottom plate by screws. One end of the buckle 3 is rotatably connected to the lower inlay block 8 through a first rotating shaft 5, and the other end is rotatably connected to the buckle handle 4 through a second rotating shaft 6; optionally, the overall shape of the buckle 3 is approximately rectangular. Two first connecting ears 3.5 extend from one end close to the lower inlay block 8, and a bearing shaft portion 3.6 is provided at the other end. The inside of the bearing shaft portion 3.6 is hollow and allows the second rotating shaft 6 to pass through; both ends of the first rotating shaft 5 are respectively fixed inside the two first connecting ears 3.5, and the end of the lower inlay block 8 is rotatably connected to the first rotating shaft 5;

[0037] The buckle 3 and the buckle handle 4 are rotatably connected through the second rotating shaft 6. When the buckle structure is buckled on the folding main member and in the locked state, the buckle and the buckle handle form a 90-degree angle, and the inner side surface of the buckle closely abuts against the side surface of the folding sub-member.

[0038] In order to further strengthen the fastening effect of the buckle structure on the folding sub-member, a groove 2.1 is formed inward on the side surface of the folding sub-member 2 that abuts against the buckle. The buckle 3 is located in the groove 2.1, and both sides of the end of the buckle close to the first connecting ear 3.5 are in contact with the inner wall of the groove, so that the groove plays a role in restricting the lateral movement of the buckle.

[0039] A card slot 4.1 matching the upper inlay block 7 is provided on the buckle handle 4. When the buckle handle 4.1 is buckled on the top plate of the folding main member, the upper inlay block is fastened in the card slot.

[0040] The lock handle 4 is fastened to the folding main part 1 by the fastening effect between the slot 4.1 and the upper mosaic block 7. When the upper mosaic block 7 is fastened in the slot 4.1, the inner side surface of the lock 3 is close to the side surface of the folding sub-part 2, thereby playing a stop and locking role for the folding sub-part 2. In order to enhance the fastening effect between the slot 4.1 and the upper mosaic block 7, while not affecting the quick opening of the lock handle 4, in this embodiment, further, a fixed circular shaft 9 is provided inside the slot 4.1, and the fixed circular shaft 9 is arranged along the width direction of the slot 4.1. The side surface of the upper mosaic block 7 that contacts the fixed circular shaft 9 is protruded with a fastening portion 7.1, and the fastening portion 7.1 is provided with an arc-shaped positioning groove 7.2 corresponding to the fixed circular shaft 9; when the lock handle 4 is fastened to the top plate of the folding main part 1, the circumferential surface of the fixed circular shaft 9 moves downward in contact with the side surface of the upper mosaic block, and is squeezed through the end of the fastening portion under the action of external force and then fastened into the arc-shaped positioning groove 7.2. The fixed round shaft 9 is arranged on the lock handle 4. When the lock handle 4 is pressed downward, the fixed round shaft 9 has an arc-shaped surface, and the clamping portion 7.1 is squeezed by an external force and clamped in the arc-shaped positioning groove 7.2, thereby tightly fixing the arc-shaped handle 4 to the folding main part 1. In order to smoothly transition the fixed round shaft 9 to the clamping portion 7.1, an arc-shaped transition surface 7.3 is provided between the top surface of the upper inlay block 7 and the side surface provided with the clamping portion 7.1.

[0041] In order to further increase the fixing effect of the lock handle 4 and the folding main part 1 and strengthen the safety protection, the lock structure also includes a spring buckle 10, and a hand-held part 4.2 is extended from the end of the lock handle 4. The spring buckle 10 includes a pressing part 10.1 and a torsion spring 10.2. The pressing part 10.1 and the hand-held part 4.2 are connected by a third rotating shaft 11, and the torsion spring 10.2 is connected between the pressing part 10.1 and the hand-held part 4.2; a first hook part 10.3 is provided on the pressing part 10.1, and a first hook groove 1.11 matching the first hook part 10.3 is provided at the corresponding position of the folding main part 1. When the lock handle 4 is buckled on the top plate, the first hook part 10.3 of the spring buckle 10 is pressed and clamped into the first hook groove 1.11. When the lock handle 4 needs to be opened, the pressing part 10.1 of the spring buckle 10 is pressed against the hand-holding part 4.2 of the lock handle 4, and the first hook part 10.3 is disengaged from the first hook groove 1.11, and then the lock handle is forcefully pried upward to make the fixed circular shaft disengage from the arc-shaped positioning groove of the clamping part, thereby separating the upper embedded block from the clamping groove, and finally opening the lock handle, and the folding sub-component loses the fastening effect of the lock.

[0042] When the buckle structure is in the open state, the entire structure hangs on the bottom side of the folding main part around the first rotating shaft, which not only occupies space but is also easily damaged by collision. In this embodiment, the buckle structure is stored and fixed at the bottom of the folding main part, which not only saves space but also protects the buckle structure. Specifically, a receiving groove 3.1 for avoiding the lower inlay block 8 is provided at the end of the buckle 3 near the first rotating shaft. A second hook portion 3.2 extends from the inner side of the receiving groove 3.1 away from the first rotating shaft 5. A second hook groove 8.1 corresponding to the second hook portion 3.2 is provided on the side of the lower inlay block 8 away from the first rotating shaft 5. The buckle rotates around the first rotating shaft 5 towards the bottom of the folding main part 1, and a part of the lower inlay block 8 is located in the receiving groove. The second hook portion 3.2 is snapped into the second hook groove 8.1 under the action of an external force, thereby fixing the buckle at the bottom of the folding main part.

[0043] In this embodiment, the buckle is in the shape of a rectangular block. In order to meet the folding and storage requirements of the buckle structure, the buckle handle is designed as a frame structure adapted to the shape of the buckle. After the buckle is fixed at the bottom of the folding main part, the buckle handle rotates around the second rotating shaft 6, and the buckle handle 4 and the buckle 3 are buckled with each other. The buckle handle 4 may include a rectangular plate, and fixing plates perpendicular to the rectangular plate and extending along the length direction of the rectangular plate are provided on both sides of the rectangular plate. A space for accommodating the buckle 3 is formed between the rectangular plate and the fixing plates on both sides. The two ends of the fixed circular shaft 9 and the third rotating shaft 11 are respectively connected to the fixing plates.

[0044] A receiving groove 3.3 corresponding to the fixed circular shaft is provided on the buckle. An inclined portion 3.4 is formed at the end of the buckle 3 near the first rotating shaft 5. After the buckle handle 4 and the buckle 3 are buckled with each other, the fixed circular shaft 9 is snapped into the receiving groove 3.3, and the first hook portion 10.3 on the pressing portion 10.1 abuts against the inclined portion 3.4 of the buckle 3. When storing the buckle structure, the buckle is fixed at the bottom of the folding main part 1. After the buckle handle 4 rotates around the second rotating shaft 6 and is docked with the buckle 3, the fixed circular shaft 9 is clamped in the receiving groove 3.3, and the first hook portion 10.3 of the spring buckle 10 abuts against the inclined portion 3.4 of the buckle 3, thereby tightly buckling the buckle handle 4 and the buckle 3, and it can only be opened under the action of an external force.

[0045] In this embodiment, a multi-rotor unmanned aerial vehicle is further provided, which includes a fuselage 100, arms 200 and a landing gear 300. There are multiple arms 200 which are arranged around the fuselage 100. The multi-rotor unmanned aerial vehicle provided by the embodiment of the present invention includes four arms. The landing gear 300 is fixed to the bottom of the fuselage 100. It further includes the above-mentioned folding assembly. The arms 200 are connected to the fuselage 100 through the folding assembly. The folding assembly includes a folding main part 1, a folding sub-part 2 and a locking structure. A folding sub-part 2 is fixed to the end of the arm 200. The folding main part 1 is fixedly connected to the fuselage 100. The folding sub-part 2 extends into the folding main part 1 and is rotatably connected to the folding main part 1. The locking structure restricts the horizontal rotation of the folding sub-part. In this embodiment, the four arms are folded and closed towards the fuselage in a counterclockwise direction in sequence. The arms are generally carbon tubes and are inserted into the folding sub-parts. The top of the folding sub-parts is horizontal and the two sides are vertical, which is beneficial to be fixed to the folding main part. Since the folding sub-part is rotatably connected to the folding main part and is fixed by the locking structure, and the end of the arm of the unmanned aerial vehicle is fixedly connected to the folding sub-part, and the folding main part is fixed to the fuselage, the folding of the arm can be realized through this folding assembly, and the operation is convenient, fast, time-saving and labor-saving.

[0046] In this embodiment, the multi-rotor unmanned aerial vehicle further includes a plurality of clamps 400 fixed on the fuselage 100. After the arms rotate towards the fuselage in a clockwise or counterclockwise direction in sequence, they are clamped in the corresponding clamps. In this embodiment, the arms are folded in a counterclockwise direction. After folding, the arms are clamped in the clamps. On the one hand, the clamps 400 can clamp the arms and play a fixing role for them to avoid horizontal rotation under force during the movement process. On the other hand, the clamps have a certain supporting effect on the arms, avoiding the weight of the arms being completely borne on the folding main part and the rotating shaft for the rotatable connection between the folding sub-part and the folding main part, greatly reducing the wear on the folding main part and the above-mentioned rotating shaft, so as to be beneficial to extending the service life.

[0047] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A folding component, characterized in that, Comprising: A folding main part (1), a rotating space (1.4) is provided inside the folding main part (1), and a rotating opening communicating with the rotating space (1.4) is provided on the side surface of the folding main part (1); A folding sub-part (2), a part of the folding sub-part (2) extends into the folding main part (1) and is rotatably connected to the folding main part (1), and the folding sub-part (2) rotates in the rotating space (1.4) along the rotating opening under the action of an external force; A locking structure, the locking structure is buckled at the rotating opening and abuts against the side surface of the folding sub-part (2) to limit the horizontal rotation of the folding sub-part (2); The folding main part (1) includes a top plate (1.1), a bottom plate (1.2) and a side plate (1.3), the top and bottom of the side plate (1.3) are respectively connected to the top plate (1.1) and the bottom plate (1.2), and the rotating space (1.4) is formed between the top plate (1.1), the bottom plate (1.2) and the side plate (1.3); the rotating opening is L-shaped, extending from one end of the side plate (1.3) to the other side of the folding main part (1) opposite to the side plate (1.3), and the rotating opening includes a first rotating opening adjacent to the side plate and a second rotating opening opposite to the side plate; when the locking structure is buckled at the second rotating opening, the two side surfaces of the folding sub-part (2) are respectively abutted against the locking structure and the side plate of the folding main part; The locking structure includes a lock (3) and a lock handle (4), one end of the lock (3) is rotatably connected to the bottom plate (1.2) of the folding main part (1), the other end is rotatably connected to the lock handle (4), the inner side of the lock (3) abuts against the side surface of the folding sub-part (2), and the lock handle (4) is fastened on the top plate (1.1) of the folding main part (1); The locking structure further includes an upper inlay block (7) and a lower inlay block (8) respectively located on the top plate and the bottom plate of the folding main part, one end of the lock (3) is rotatably connected to the lower inlay block (8) through a first rotating shaft (5), and the other end is rotatably connected to the lock handle (4) through a second rotating shaft (6); a card slot (4.1) matching with the upper inlay block (7) is provided on the lock handle (4), and when the lock handle (4) is buckled on the top plate (1.1) of the folding main part (1), the upper inlay block (7) is fastened in the card slot (4.1); A fixed circular shaft (9) is provided inside the card slot (4.1), the fixed circular shaft (9) is arranged along the width direction of the card slot (4.1), a clamping part (7.1) protrudes from the side surface of the upper inlay block (7) in contact with the fixed circular shaft (9), and an arc-shaped positioning groove (7.2) corresponding to the fixed circular shaft (9) is provided on the clamping part (7.1); during the process of buckling the lock handle (4) on the top plate of the folding main part, the circumferential surface of the fixed circular shaft (9) fits and moves downward along the side surface of the upper inlay block (7), and is extruded and clamped into the arc-shaped positioning groove after passing through the end of the clamping part (7.1) under the action of an external force.

2. The folding assembly according to claim 1, wherein The latch structure further includes a spring latch (10). An end of the latch handle (4) extends with a hand-held portion (4.2). The spring latch (10) includes a pressing portion (10.1) and a torsion spring (10.2). The pressing portion (10.1) is connected to the hand-held portion (4.2) through a third rotating shaft (11), and the torsion spring (10.2) is connected between the pressing portion (10.1) and the hand-held portion (4.2). A first hook portion (10.3) extends on the pressing portion (10.1). A first hook groove (1.11) matching the first hook portion (10.3) is provided at a corresponding position on the folding main member (1). When the latch handle (4) is latched on the top plate (1.1), the first hook portion (10.3) of the spring latch (10) is pressed and snapped into the first hook groove (1.11).

3. The folding assembly according to claim 2, wherein, A receiving groove (3.1) for avoiding the lower inlay block (8) is provided at the end of the latch (3) near the first rotating shaft (5). A second hook portion (3.2) extends from an inner side of the receiving groove (3.1) far from the first rotating shaft (5). A second hook groove (8.1) corresponding to the second hook portion (3.2) is provided on a side of the lower inlay block (8) far from the first rotating shaft (5). The latch (3) rotates around the first rotating shaft (5) towards the bottom of the folding main member (1), and the second hook portion (3.2) is snapped into the second hook groove (8.1) under the action of an external force.

4. The folding assembly according to claim 3, wherein A receiving groove (3.3) corresponding to the fixed circular shaft (9) is provided on the latch (3). An inclined portion (3.4) is formed at the end of the latch (3) near the first rotating shaft (5). After the latch handle (4) and the latch (3) are latched with each other, the fixed circular shaft (9) is snapped into the receiving groove (3.3), and the first hook portion (10.3) on the pressing portion (10.1) abuts against the inclined portion (3.4) of the latch (3).

5. A multi-rotor unmanned aerial vehicle, characterized in that, It includes a fuselage (100), arms (200) and a landing gear (300). There are multiple arms (200) arranged around the fuselage (100). The landing gear (300) is fixed to the bottom of the fuselage (100). It further includes the folding assembly described in any one of claims 1-4. The arms (200) are connected to the fuselage (100) through the folding assembly. The folding assembly includes a folding main member (1), a folding sub-member (2) and a latch structure. The end of the arm (200) is fixed with the folding sub-member (2). The folding main member (1) is fixedly connected to the fuselage (100). The folding sub-member (2) extends into the folding main member (1) and is rotatably connected to the folding main member (1). The latch structure restricts the horizontal rotation of the folding sub-member (2).

6. The multi-rotor unmanned aerial vehicle according to claim 5, wherein, It further includes a plurality of clips (400) fixed on the fuselage (100). After the arms (200) rotate clockwise or counterclockwise in sequence towards the fuselage direction, they are clamped in the corresponding clips (400).

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