A mechanism for folding a robot arm, a folding robot arm and a drone

Abstract

The application relates to the technical field of unmanned aerial vehicle devices, and discloses a machine arm folding mechanism, an unmanned aerial vehicle folding machine arm and an unmanned aerial vehicle. In the machine arm folding mechanism, a first folding piece, a buckle assembly and a second folding piece are arranged; one end of the second folding piece is rotationally connected with the machine arm rotating shaft; a spring buckle assembly is arranged on the opposite side of the one end of the second folding piece and the machine arm rotating shaft; a spring buckle is arranged on one side edge of the spring buckle assembly close to the first folding piece; a fixed base is arranged on the opposite side of the machine arm rotating shaft on the first folding piece; the buckle assembly is fixed on the fixed base; the buckle assembly comprises a clamping hook and a movable locking piece. When the first folding piece and / or the second folding piece is unfolded around the machine arm rotating shaft, the clamping hook is used for buckling with the spring buckle, the movable locking piece is rotated to press the spring buckle, and the relative displacement between the spring buckle and the clamping hook is locked.

Description

Technical Field

[0001] This invention relates to the field of unmanned aerial vehicle (UAV) device technology, and more specifically, to an arm folding mechanism, a UAV folding arm, and a UAV. Background Technology

[0002] With the rapid development of drone technology, multi-rotor drones, in particular, possess advantages such as agility, light weight, hovering capability, and the ability to take off and land at any location. They can be equipped with detection equipment such as visible light sensors, infrared imagers, and cameras, enabling more convenient and rapid reconnaissance and aerial photography tasks. They are widely used in applications such as power line inspection, traffic monitoring, land surveying, and marine and water conservancy monitoring. As their applications become more widespread, the required payload weight of drones is also increasing. This necessitates a longer boom length, which poses challenges for engineering transportation and storage, hindering the rapid and flexible execution of various engineering tasks. Therefore, adopting foldable booms can significantly reduce the overall size of the drone, facilitating storage and transportation.

[0003] Existing folding arm structures typically use locking mechanisms to connect the folding components. These locking mechanisms generally employ methods such as latches formed by mating bosses and grooves, or other snap-fit ​​components. However, when this conventional locking structure is applied to drone arms, it suffers from low structural connection reliability, especially when the drone is carrying heavy loads, which can easily lead to the folding arm coming loose. Summary of the Invention

[0004] To overcome the shortcomings of existing folding arms in terms of low structural connection reliability, this invention provides an arm folding mechanism, a drone folding arm, and a drone.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0006] A folding arm mechanism includes a first folding member, a latching assembly, and a second folding member; wherein: the first folding member is rotatably connected to one end of the second folding member via a folding arm pivot; a spring-loaded latching assembly is provided at one end of the second folding member on the side opposite to the folding arm pivot, and a spring-loaded latch is provided on the side of the spring-loaded latching assembly near the first folding member; a fixed base is provided on the first folding member on the side opposite to the folding arm pivot, and the latching assembly is fixed to the fixed base; the latching assembly includes a hook and a movable locking member.

[0007] When the first folding member and / or the second folding member unfolds around the arm pivot, the hook is used to engage with the snap fastener, and the movable locking member rotates to press the snap fastener, thereby locking the relative displacement between the snap fastener and the hook.

[0008] When the first folding member and / or the second folding member folds around the arm pivot, rotate the movable locking member to disengage it from the snap fastener, press the snap fastener to disengage it from the hook, and bend the first folding member and the second folding member to complete the folding.

[0009] As a preferred embodiment, the buckle assembly includes a buckle base with a screw hole. The movable locking member is connected to the buckle base via a washer and a locking screw through the screw hole. The movable locking member rotates around the locking screw as a pivot. The hook is disposed on the buckle base and is located on the side closer to the second folding member.

[0010] As a preferred embodiment, a positioning hole is provided at the bottom of one side of the movable locking member, and a positioning bead is placed inside the positioning hole. The positioning bead is connected to the bottom of the positioning hole through an elastic element. When the hook is engaged with the snap fastener, and the movable locking member is rotated so that one side of the movable locking member is above the snap fastener, the positioning bead elastically abuts against the upper surface of the snap fastener.

[0011] As a preferred embodiment, the buckle base is further provided with a limiting boss; when the hook is engaged with the spring buckle and the movable locking member is rotated to press the spring buckle, the limiting boss abuts against the side of the movable locking member.

[0012] As a preferred embodiment, a pin hole is formed on the buckle base along the rotation path of the movable locking member; a pin is built into the pin hole, and the pin is connected to the bottom of the pin hole through an elastic element; a spring buckle extension is provided on one side of the spring buckle near the buckle assembly; when the arm is in a folded state, the pin extends out of the pin hole under the action of the elastic element, and the side of the pin abuts against the side of the movable locking member; when the arm is in an unfolded state, and the hook is engaged with the spring buckle, the bottom of the spring buckle extension abuts against the pin, and compresses the pin downward into the pin hole.

[0013] As a preferred embodiment, the spring-loaded buckle assembly includes a spring-loaded buckle base, and the spring-loaded buckle is rotatably connected to the spring-loaded buckle base via a pivot; at least one compression spring is connected between the spring-loaded buckle and the spring-loaded buckle base.

[0014] As a preferred embodiment, the first folding member has a first connecting hole at one end near the second folding member; one end of the second folding member has a connecting part for rotatably connecting with the first folding member, and the two sides of the connecting part have second connecting holes at opposite ends; after the end of the arm shaft passes through the second connecting hole, it is fixedly connected to the first connecting hole by a locking screw to form a rotating pair.

[0015] As a preferred embodiment, a lubricating copper sleeve is provided on the inner wall of the first connecting hole and / or the second connecting hole, and the lubricating copper sleeve is interference-fitted with the first connecting hole and / or the second connecting hole.

[0016] Furthermore, the present invention also proposes a folding arm for a drone, comprising an arm connected to a folding arm mechanism as proposed in the present invention.

[0017] Furthermore, the present invention also proposes a drone, including a drone body, wherein the drone body is connected to at least one arm folding mechanism as proposed in the present invention.

[0018] Compared with the prior art, the beneficial effects of the technical solution of the present invention are:

[0019] The present invention uses a combination of spring buckle and hook to achieve the connection and fixation between the first folding part and the second folding part, and further uses a movable locking part to lock the snap-fit ​​structure of the spring buckle and hook to prevent the arm folding mechanism from loosening during use;

[0020] This invention uses a movable locking component to effectively press the gap between the spring buckle and the latch on the folding arm, ensuring the stability of the buckling structure of the folding arm and reducing the instability of the aircraft flight caused by arm vibration. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the arm folding mechanism according to an embodiment of the present invention.

[0022] Figure 2 This is an exploded view of a snap-fit ​​assembly according to an embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram illustrating the latch assembly in a locked spring-loaded state according to an embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram illustrating the latching assembly in the released latching state according to an embodiment of the present invention.

[0025] Figure 5 This is an exploded view of the spring-loaded buckle assembly according to an embodiment of the present invention.

[0026] Figure 6 This is an exploded view of the arm folding mechanism according to an embodiment of the present invention.

[0027] Figure 7 This is a schematic diagram illustrating the unfolded state of the folding arm of a drone according to an embodiment of the present invention.

[0028] Among them, 100-first folding piece, 110-arm pivot, 120-fixed base, 130-first connecting hole, 200-second folding piece, 210-connecting part, 211-second connecting hole, 220-lubricating copper sleeve, 300-buckle assembly, 310-buckle hook, 320-movable locking piece, 321-washer, 322-locking screw, 323-positioning hole, 324-positioning bead, 330-buckle base, 331-screw hole, 332-limiting boss, 333-ejector hole, 334-ejector, 400-spring buckle assembly, 410-spring buckle, 411-spring buckle extension, 420-spring buckle base, 430-compression spring. Detailed Implementation

[0029] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0030] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] 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.

[0032] Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0033] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0034] Example 1

[0035] This embodiment proposes a folding arm mechanism, such as... Figure 1 The diagram shown is a structural schematic of the arm folding mechanism in this embodiment.

[0036] The arm folding mechanism proposed in this embodiment includes a first folding component 100, a buckle assembly 300, a second folding component 200, and a spring buckle assembly 400.

[0037] The first folding member 100 is rotatably connected to one end of the second folding member 200 via a machine arm pivot 110; the spring buckle assembly 400 is disposed at one end of the second folding member 200 and on the opposite side of the machine arm pivot 110, and a spring buckle 410 is disposed on one side of the spring buckle assembly 400 near the first folding member 100; a fixed base 120 is disposed on the first folding member 100 and on the opposite side of the machine arm pivot 110, and the buckle assembly 300 is fixed to the fixed base 120; the buckle assembly 300 includes a hook 310 and a movable locking member 320.

[0038] When the first folding member 100 and / or the second folding member 200 are unfolded around the arm pivot 110, the hook 310 is used to engage with the snap fastener 410, and the movable locking member 320 is rotated to press the snap fastener 410 to lock the relative displacement between the snap fastener 410 and the hook 310.

[0039] When the arm needs to be folded and stored, rotate the movable locking member 320 to release it from the spring buckle 410, press the spring buckle 410 to disengage it from the hook 310, and bend the first folding member 100 and / or the second folding member 200 around the arm pivot 110, so that the first folding member 100 and the second folding member 200 are folded.

[0040] For example, the side of the hook 310 near the snap fastener 410 is a wedge-shaped plane. When the first folding member 100 and / or the second folding member 200 unfold around the arm pivot 110, the snap fastener 410 moves closer to the hook 310 until they come into contact. At this time, the fastener below the snap fastener 410 moves along the wedge-shaped plane of the hook 310 until the snap fastener 410 and the hook 310 are fully engaged.

[0041] In this embodiment, a combination of spring buckle 410 and hook 310 is used to connect and fix the first folding member 100 and the second folding member 200. Furthermore, the movable locking member 320 is used to lock the snap-fit ​​structure of spring buckle 410 and hook 310 to prevent the arm folding mechanism from loosening during use.

[0042] For example, the first folding member 100 or the second folding member 200 is used to connect the drone arm, and the second folding member 200 or the first folding member 100 is used to connect the drone body, propellers or drone arm.

[0043] For example, the movable locking member 320 is a knob structure. When the first folding member 100 and / or the second folding member 200 are unfolded around the arm pivot 110, the hook 310 engages with the spring buckle 410. Then, the movable locking member 320 of the knob structure is screwed to press the spring buckle 410 to complete the locking.

[0044] Example 2

[0045] This embodiment is an improvement on the arm folding mechanism proposed in Embodiment 1.

[0046] The arm folding mechanism proposed in this embodiment includes a first folding member 100, a latching assembly 300, a second folding member 200, and a spring-loaded latching assembly 400. The first folding member 100 is rotatably connected to one end of the second folding member 200 via an arm pivot 110. The spring-loaded latching assembly 400 is disposed at one end of the second folding member 200 and on the opposite side of the arm pivot 110, with a spring-loaded latch 410 disposed on one side of the spring-loaded latching assembly 400 near the first folding member 100. A fixed base 120 is disposed on the first folding member 100 and on the opposite side of the arm pivot 110, and the latching assembly 300 is fixed to the fixed base 120. The latching assembly 300 includes a hook 310 and a movable locking member 320.

[0047] Furthermore, the buckle assembly 300 includes a buckle base 330, on which a screw hole 331 is provided. The movable locking member 320 is connected to the buckle base 330 via a washer 321 and a locking screw 322 through the screw hole 331. The movable locking member 320 rotates about the locking screw 322 as a pivot. The hook 310 is disposed on the buckle base 330 and on the side close to the second folding member 200.

[0048] For example, such as Figure 2 The image shown is an exploded view of the snap-fit ​​assembly in this embodiment.

[0049] In this embodiment, the movable locking member 320 rotates around the locking screw 322 as its rotation axis. When the first folding member 100 and / or the second folding member 200 unfold around the arm pivot 110, the hook 310 engages with the spring buckle 410, and the movable locking member 320 rotates around the locking screw 322 to press the spring buckle 410, locking the engagement state of the hook 310 and the spring buckle 410, further eliminating the engagement gap when the spring buckle 410 and the hook 310 are engaged, and avoiding the problem of drone flight vibration caused by gap misalignment.

[0050] In an optional embodiment, a positioning hole 323 is provided at the bottom of one side of the movable locking member 320, and a positioning bead 324 is placed inside the positioning hole 323. The positioning bead 324 is connected to the bottom of the positioning hole 323 through an elastic element. When the hook 310 is engaged with the spring buckle 410, and the movable locking member 320 is rotated so that one side of the movable locking member 320 is above the spring buckle 410, the positioning bead 324 elastically abuts against the upper surface of the spring buckle 410.

[0051] For example, such as Figure 3 The diagram shows the latch assembly in the locked spring-loaded state. Specifically, the positioning bead 324 abuts against the upper surface of the spring-loaded latch 410, and more specifically, against the upper surface of the spring-loaded latch extension 411.

[0052] For example, the elastic element is a compression spring.

[0053] In this embodiment, the positioning bead 324 is used to elastically abut against the upper surface of the snap 410 under the elastic force of the elastic element inside the movable locking member 320 when the movable locking member 320 is rotated to the locking snap state. At this time, under the action of the positioning bead 324, the snap 410 and the hook 310 are tightly engaged, and the relative misalignment is eliminated, so that the first folding member 100, the snap fastener assembly 300 and the second folding member 200 are fixedly connected into a stable overall structure.

[0054] In an optional embodiment, the buckle base 330 is further provided with a limiting boss 332; when the hook 310 is engaged with the spring buckle 410 and the movable locking member 320 is rotated to press the spring buckle 410, the limiting boss 332 abuts against the side of the movable locking member 320.

[0055] In this embodiment, the limiting boss 332 is used to limit the rotation angle of the movable locking member 320. Specifically, when the movable locking member 320 rotates to the locking snap-on state, that is, when the movable locking member 320 rotates to press against the snap-on 410, the side of the movable locking member 320 abuts against the limiting boss 332, preventing the rotation range of the movable locking member 320 from exceeding the snap-on 410 area, thereby preventing the movable locking member 320 from becoming detached from the snap-on 410 and causing a serious problem of the aircraft breaking down, effectively ensuring the safety of the aircraft.

[0056] In an optional embodiment, a pin hole 333 is formed on the buckle base 330 and along the rotation path of the movable locking member 320; a pin 334 is housed in the pin hole 333, and the pin 334 is connected to the bottom of the pin hole 333 via an elastic element; a snap fastener extension 411 is provided on one side of the snap fastener 410 near the buckle assembly 300; when the mechanism is in a folded state, the pin 334 extends out of the pin hole 333 under the action of the elastic element, and the side of the pin 334 abuts against the side of the movable locking member 320; when the mechanism is in an unfolded state, and the hook 310 is engaged with the snap fastener 410, the bottom of the snap fastener extension 411 abuts against the pin 334, and compresses the pin 334 downward into the pin hole 333.

[0057] For example, such as Figure 4 The diagram shown is a schematic of the latch assembly in the released latch state.

[0058] In this embodiment, the ejector pin 334 is used to limit the movement of the movable locking member 320 when the snap-lock is released, preventing the rotation of the movable locking member 320 from affecting the engagement of the hook 310 and the snap-lock 410. Specifically, when the movable locking member 320 is in the released snap-lock state, the ejector pin 334 extends out of the ejector pin hole 333 under the elastic support of the elastic element. At this time, the ejector pin 334 acts as a limiting member to restrict the rotation range of the movable locking member 320, preventing the movable locking member 320 from rotating into the area of ​​the hook 310. When the arm is in the extended state, and the spring buckle 410 and the hook 310 are engaged, the spring buckle extension 411 contacts the hook 310 and moves along the wedge-shaped structure at the front of the hook 310 until the fastener at the bottom of the spring buckle 410 engages with the hook 310. At this time, the spring buckle extension 411 presses against the ejector pin 334 and compresses it downward into the ejector pin hole 333. Then the movable locking member 320 can rotate to the top of the spring buckle 410 and press the spring buckle 410 tight.

[0059] Example 3

[0060] This embodiment is an improvement on embodiment 1 or embodiment 2.

[0061] The arm folding mechanism proposed in this embodiment includes a first folding member 100, a latching assembly 300, a second folding member 200, and a spring-loaded latching assembly 400. The first folding member 100 is rotatably connected to one end of the second folding member 200 via an arm pivot 110. The spring-loaded latching assembly 400 is disposed at one end of the second folding member 200 and on the opposite side of the arm pivot 110, with a spring-loaded latch 410 disposed on one side of the spring-loaded latching assembly 400 near the first folding member 100. A fixed base 120 is disposed on the first folding member 100 and on the opposite side of the arm pivot 110, and the latching assembly 300 is fixed to the fixed base 120. The latching assembly 300 includes a hook 310 and a movable locking member 320.

[0062] Optionally, the spring-loaded buckle assembly 400 includes a spring-loaded buckle 410, a spring-loaded buckle base 420, and a compression spring 430. The spring-loaded buckle base 420 is disposed at one end of the second folding member 200 and on the opposite side of the arm pivot 110. The spring-loaded buckle 410 is rotatably connected to the spring-loaded buckle base 420 via the pivot. At least one compression spring 430 is connected between the spring-loaded buckle 410 and the spring-loaded buckle base 420.

[0063] For example, such as Figure 5 The image shown is an exploded view of the spring clip assembly.

[0064] In this embodiment, the compression spring 430 provided between the snap fastener 410 and the snap fastener base 420 provides elastic force to the snap fastener 410. As the arm folding mechanism unfolds, the snap fastener 410 contacts the hook 310 and moves along the wedge-shaped plane at the front of the hook 310. At this time, one end of the snap fastener 410 rotates upward around the axis under the support of the hook 310, and the other end of the snap fastener 410 rotates downward around the axis, while simultaneously compressing the compression spring 430 until the fastener at the bottom of the snap fastener 410 reaches the engagement position of the hook 310. At this time, the compression spring 430 automatically springs up and resets, and the snap fastener 410 and the hook 310 are engaged.

[0065] For example, the spring clip 410 rotates using an optical axis screw as its pivot.

[0066] In an optional embodiment, the first folding member 100 has a first connecting hole 130 oppositely disposed at one end near the second folding member 200; one end of the second folding member 200 is provided with a connecting part 210 for rotatably connecting with the first folding member 100, and the two sides of the connecting part 210 have second connecting holes 211 oppositely disposed; after the end of the arm shaft 110 passes through the second connecting hole 211, it is fixedly connected to the first connecting hole 130 by a locking screw 322 to form a rotating pair.

[0067] For example, such as Figure 6 The image shown is an exploded view of the arm folding mechanism.

[0068] In this embodiment, the first folding member 100 and the second folding member 200 are respectively provided with connecting holes for connecting the arm pivot 110. The spring-loaded base 420 is disposed on the connecting part 210 and on the opposite side of the arm pivot 110.

[0069] For example, the first folding member 100 is sleeved on the second folding member 200, and the first connecting hole 130 and the second connecting hole 211 overlap. Further, after the end of the arm pivot 110 passes through the second connecting hole 211, it is fixedly connected to the first connecting hole 130 by a locking screw 322 to form a rotating pair, thereby realizing the folding and unfolding function of the arm folding mechanism.

[0070] Optionally, a lubricating copper sleeve 220 is provided on the inner wall of the first connecting hole 130 and / or the second connecting hole 211, and the lubricating copper sleeve 220 is interference-fitted with the first connecting hole 130 and / or the second connecting hole 211.

[0071] In this embodiment, a lubricating copper sleeve 220 is pressed into the first connecting hole 130 and / or the second connecting hole 211. It utilizes the self-lubricating material properties of the copper sleeve to make clearance fit with the arm rotating shaft 110, so that a smooth rotating pair is formed between the first folding member 100 and the second folding member 200.

[0072] Example 4

[0073] This embodiment proposes a folding arm for a drone, including an arm 500, which is connected to a folding arm mechanism as described in embodiments 1 to 3.

[0074] For example, one end of the arm 500 is connected to the second folding member 200, and the other end of the arm 500 is connected to the drone power system, drone propellers, or drone-mounted equipment; while the first folding member 100 is connected to the drone body as a fixed base.

[0075] like Figure 7 The diagram shown is a schematic of the unfolded state of the folding arm of the drone in this embodiment.

[0076] It is understood that the folding arm of the drone in this embodiment includes the arm folding mechanism described in embodiments 1 to 3 above. The options in embodiment 1 above are also applicable to this embodiment, so they will not be described again here.

[0077] Example 5

[0078] This embodiment proposes a drone, including a drone body, wherein the drone body is connected to at least one arm folding mechanism as described in embodiments 1 to 3.

[0079] It is understood that the drone in this embodiment includes the arm folding mechanism described in embodiments 1 to 3 above. The options in embodiment 1 above are also applicable to this embodiment, so they will not be described again here.

[0080] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A folding arm mechanism, characterized in that, It includes a first folding component (100), a snap-fit ​​assembly (300), and a second folding component (200); wherein: The first folding member (100) is rotatably connected to one end of the second folding member (200) via a machine arm pivot (110); A spring buckle assembly (400) is provided at one end of the second folding member (200) and on the opposite side of the arm pivot (110), and a spring buckle (410) is provided on the side of the spring buckle assembly (400) near the first folding member (100). A fixed base (120) is provided on the first folding member (100) and on the opposite side of the arm pivot (110), and the buckle assembly (300) is fixed on the fixed base (120); The buckle assembly (300) includes a hook (310) and a movable locking member (320); when the first folding member (100) and / or the second folding member (200) are unfolded around the arm pivot (110), the hook (310) is used to engage with the spring buckle (410), and the movable locking member (320) rotates to press the spring buckle (410) to lock the relative displacement between the spring buckle (410) and the hook (310); The buckle assembly (300) includes a buckle base (330) with a screw hole (331) on it. The movable locking member (320) is connected to the buckle base (330) through the screw hole (331) via a washer (321) and a locking screw (322). The movable locking member (320) rotates about the locking screw (322) as a pivot. The hook (310) is disposed on the buckle base (330) and on the side close to the second folding member (200). The movable locking member (320) has a positioning hole (323) at the bottom of one side, and a positioning bead (324) is placed inside the positioning hole (323). The positioning bead (324) is connected to the bottom of the positioning hole (323) through an elastic element. When the hook (310) is engaged with the snap fastener (410) and the movable locking member (320) is rotated to a position where one side of the movable locking member (320) is above the snap fastener (410), the positioning bead (324) elastically abuts against the upper surface of the snap fastener (410). The buckle base (330) is also provided with a limiting boss (332); when the buckle (310) is engaged with the spring buckle (410) and the movable locking member (320) is rotated to press the spring buckle (410), the limiting boss (332) abuts against the side of the movable locking member (320); A pin hole (333) is provided on the buckle base (330) and on the rotation path of the movable locking member (320); a pin (334) is built into the pin hole (333), and the pin (334) is connected to the bottom of the pin hole (333) through an elastic element; a snap fastener extension (411) is provided on the side of the snap fastener (410) near the buckle assembly (300); when the mechanism is in the folded state, the pin (334) extends out of the pin hole (333) under the action of the elastic element, and the side of the pin (334) abuts against the side of the movable locking member (320); when the mechanism is in the unfolded state, and the hook (310) is engaged with the snap fastener (410), the bottom of the snap fastener extension (411) abuts against the pin (334) and compresses the pin (334) downward into the pin hole (333).

2. The arm folding mechanism according to claim 1, characterized in that, The spring buckle assembly (400) includes a spring buckle base (420), and the spring buckle (410) is rotatably connected to the spring buckle base (420) via a pivot; at least one compression spring (430) is connected between the spring buckle (410) and the spring buckle base (420).

3. The arm folding mechanism according to claim 1, characterized in that, The first folding member (100) has a first connecting hole (130) opposite to the end of the second folding member (200); the second folding member (200) has a connecting part (210) for rotatably connecting with the first folding member (100) at one end, and the connecting part (210) has a second connecting hole (211) opposite to the other side; the end of the arm shaft (110) passes through the second connecting hole (211) and is fixedly connected to the first connecting hole (130) by a locking screw (322) to form a rotating pair.

4. The arm folding mechanism according to claim 3, characterized in that, The inner wall of the first connecting hole (130) and / or the second connecting hole (211) is provided with a lubricating copper sleeve (220), and the lubricating copper sleeve (220) is interference-fitted with the first connecting hole (130) and / or the second connecting hole (211).

5. A folding arm for a drone, comprising an arm, characterized in that, The arm is connected to an arm folding mechanism as described in any one of claims 1 to 4.

6. A drone, comprising a drone body, characterized in that, The drone body is connected to at least one arm folding mechanism as described in any one of claims 1 to 4.

Images