WO2018018503A1 - Chassis assembly and unmanned aerial vehicle utilizing same - Google Patents

Abstract

A chassis assembly (10) utilized in an unmanned aerial vehicle (1) comprises a central portion (12) and first arms (14). One end of each of the first arms (14) is connected to the central portion (12). Each of the first arms (14) comprises a first portion (141), a third portion (143) connected to the central portion (12), and a second portion (142) connecting the first portion (141) and the third portion (143). The chassis assembly (10) can be switched between an expanded form and a folded form. In the folded form, the first portion (141) and the third portion (143) are located on different planes. The chassis assembly provides simple and compact folding for the unmanned aerial vehicle.

Description

Rack assembly and drone using the rack assembly Technical field

The present invention relates to a rack assembly, and more particularly to a rack assembly for a drone and a drone using the same.

Background technique

At present, the UAV is mainly composed of a rack component, a flight control system, a power system and a load. The rack component is the main body, and the remaining parts are mounted and fixed to each other through the rack assembly. Wherein the frame assembly generally includes a body and a plurality of arms extending outwardly from the body. However, the outwardly extending arm increases the size of the drone, which is not conducive to portability. In order to improve portability, a foldable drone with a foldable arm emerges.

At present, the existing arm folding mechanism often has an overall volume that is too large after the aircraft is folded, which makes it inconvenient to protect and transport the whole machine.

Summary of the invention

In view of the above, it is necessary to provide a rack assembly that can further reduce the size of the folded body and a drone using the rack assembly.

A rack assembly for a drone, the rack assembly including a center portion and a first arm, one end of the first arm being coupled to the center portion, the first arm including a first portion, a third portion coupled to the central portion and a second portion connecting the first portion and the third portion, the frame assembly being switchable between an expanded state and a folded state, wherein in the folded state, the first portion and The third part is located on different planes.

A drone includes the above described rack assembly and a power system disposed on the rack assembly for moving the drone.

The first and third portions of the frame assembly and the first arm of the drone are located in different planes to avoid interference with other components and to facilitate reduction of the folding volume.

DRAWINGS

1 is a perspective view of a drone according to an embodiment of the present invention.

2 is a plan view showing a frame assembly of the unmanned aerial vehicle according to an embodiment of the present invention in an unfolded state.

Figure 3 is a side elevational view of the frame assembly of Figure 2.

4 is a plan view showing a frame assembly of the drone of the embodiment of the present invention in a folded state.

Figure 5 is a cross-sectional view of the frame assembly of Figure 4 taken along line V-V.

Fig. 6 is a plan view showing a frame assembly of the unmanned aerial vehicle according to the second embodiment of the present invention.

Figure 7 is a plan view of the frame assembly of the drone of the second embodiment of the present invention during folding.

Main component symbol description

Drone	1
Rack assembly	10
Central department	12
Buckle	120
First arm	14
first part	141
the second part	142
the third part	143
Second arm	16
Buckle	160
Host arm	18
Buckle	180
Power system installation	19
Auxiliary arm	15

The invention will be further illustrated by the following detailed description in conjunction with the accompanying drawings.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

It should be noted that when a component is referred to as being "fixed" to another component, it can be directly on the other component or the component can be present. When a component is considered to "connect" another component, it can be directly connected to another component or possibly a central component. When a component is considered to be "set to" another component, it can be placed directly on another component or possibly with a centered component. The terms "vertical," "horizontal," "left," "right," and the like, as used herein, are for illustrative purposes only.

All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. The terminology used in the description of the present invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and/or" used herein includes any and all combinations of one or more of the associated listed items.

The present invention provides a drone that can be used in any suitable environment, such as in the air (eg, a rotorcraft, a fixed-wing aircraft, or a fixed-wing and rotor-mixed aircraft), in water (eg, a ship or submarine) ), on the ground (eg, motorcycles, cars, trucks, buses, trains, etc.), in space (eg, space shuttle, satellite or detector), or underground (eg subway), or any of the above environments combination.

Some embodiments of the present invention are described in detail below with reference to the accompanying drawings. The features of the embodiments and examples described below can be combined with each other without conflict.

Referring to FIG. 1, the drone 1 includes a rack assembly 10 and a power system (not shown) disposed on the rack assembly 10.

The power system can be used to cause the drone 1 to take off, land, hover, and move in the air with respect to three translational degrees of freedom and three degrees of rotational freedom. In some embodiments, the power system can include one or more rotors (not shown) and a drive mechanism (eg, a motor). The rotor may include one or more rotor blades coupled to a rotating shaft. The rotor blade or shaft can be rotated by a suitable drive mechanism. The rotors may be one, two, three, four, five, six, seven, eight or more. The rotor may be disposed horizontally, vertically, or at any suitable angle relative to the drone 1. The angle of the rotor may be fixed or variable. The distance between the oppositely disposed axes of the rotors may be any suitable distance, such as less than or equal to 2 meters, or less than or equal to 5 meters. Alternatively, the distance may be between 40 cm and 1 meter, between 10 cm and 2 meters, or between 5 cm and 5 meters. The power system can be driven by any suitable motor, such as a DC motor (eg, a brushed motor or a brushless motor) or an AC motor. In some embodiments, the electric machine can be assembled to drive a rotor blade.

The frame assembly 10 can include a central portion 12, a plurality of first arms 14, a plurality of second arms 16, and a host arm 18. One end (proximal end) of each of the first arms 14 is connected to the center portion 12, and the other end (distal end) is connected to the main arm 18. One end (proximal end) of each of the second arms 16 is connected to the center portion 12, and the other end (distal end) is connected to the main arm 18.

It can be understood that, in some embodiments, the drone 100 can include any suitable number of first arm 14, second arm 16, and host arm 18, for example, 1, 2, 3, 4 or more, in other embodiments, the number of the first arm 14 and the second arm 16 to which each of the host arms 18 is connected may be appropriately changed, for example, each The main arm 18 can connect two, three or more of the first arm 14 / the second arm 16 . In the present embodiment, the frame assembly 10 includes two first arms 14, two second arms 16, and two host arms 18. The two first arm 14 and the two second arms 16 may be disposed symmetrically or asymmetrically around the central portion 12. In this embodiment, the two first arm 14 and the two second arms 16 are symmetrically disposed around the roll axis of the center portion 12. The two main body arms 18 are symmetrically disposed on both sides of the roll axis of the center portion 12. Preferably, the first arm 14 and the second arm 16 are respectively at an equal angle to the central portion 12, thereby making the operation of the drone more stable. Optionally, the first arm 14 and the second arm 16 are rotatably connected to the central portion 12 such that a host connected to the first arm 14 and the second arm 16 The height of the arm 18 relative to the central portion 12 is adjustable. The host arm 18 can be located below the top of the central portion 12 or above the top of the central portion 12 or substantially flush with the central portion 12. The first arm 14 may be disposed in the head direction of the drone 100 or in the direction of the head of the drone 100. Accordingly, the second arm 16 is disposed adjacent to the unmanned person. The tail direction of the machine. It can be understood that, in other embodiments, the first arm 14 can be disposed near the tail of the drone 100, and correspondingly, the second arm 16 is disposed close to the unmanned The direction of the nose of the machine.

A control system (e.g., a flight control system) may be disposed on the center portion 12 to control the flight of the drone 1. In some embodiments, the control system is based on one or more of: the location of the drone 1, the orientation of the drone 1, the current state of the drone 1, time or said The unmanned aerial vehicle 1 is automatically controlled by the sensor or load of the drone 1 sensing the acquired data.

Alternatively or in combination, the control system may include a receiver or other communication module disposed on the drone 1 for receiving user instructions, such as receiving user instructions from a remote terminal. The user command received by the receiver is used to control the power system, the power system for driving the drone to operate, such as taking off, flying, hovering or landing, and the like.

The central portion 12 can be used to support a load. The load can be coupled to any suitable location of the central portion 12, such as the bottom or underside of the central portion 12. The connection between the load and the central portion 12 may be a fixed connection, or the load may be movable relative to the central portion 12.

The load may be a load for performing a particular function, such as a sensor, transmitter, tool, instrument, manipulator, or other functional device. For example, the load can be an image acquisition device. In some scenarios, the image acquisition device may be a camera located below the central portion 10. The camera can be rotated relative to the central portion 12 (e.g., via a carrier or other mounting platform, such as a pan/tilt) to capture images of multiple viewing angles.

The power system can be disposed on the host arm 18. As shown in Figure 1, the end of the mainframe arm 18 is provided with a power system mounting portion 19 for mounting the power system thereon. It will be appreciated that each end of the mainframe arm 18 may be provided with one or two power systems.

The central portion 12 is provided with a buckle 120. The buckle 120 can be engaged with the second arm 16 when the second arm 16 is in a folded state, so as to prevent the second arm from being folded after being folded. swing.

Referring to FIG. 2 and FIG. 3 together, the frame assembly 10 is in an unfolded state. The distal end of the first arm 14 is rotatably fixed to one side of the main arm 18 by a fixing means such as a hinge. In the unfolded state, the two first arms 14 extend toward the nose of the drone, and the two first arms 16 extend toward the tail of the drone. It can be understood that in other embodiments, the two first arms 14 extend toward the tail of the drone, and the two first arms 16 extend toward the nose of the drone. In the unfolded state, the angle formed by the first arm 14 and the main arm 18 is an acute angle, and the angle formed between the two first arms 14 is an obtuse angle. The distal end of the second arm 16 is fixed to the main body arm 18 by a quick release self-locking mechanism. In order to make the main arm 18 and the second arm 16 staggered when folded, the second arm 16 is disposed on the back of the main arm 18, that is, fixed to the main arm 16 at the host. The faces on the arms 18 are adjacent to each other. In the turn-on state, the second arm 16 and the host arm 18 are not in the same plane. An angle formed between the two second arms 16 is an obtuse angle, and an angle formed between the second arm 16 and the main arm 18 is an acute angle. In the deployed state, a stable triangular structure is formed between the first arm 14, the second arm 16, and the main arm 18. Preferably, the first arm 14 and the second arm 16 are respectively substantially equal to the angle formed by the central portion 12, so that the first arm 14 and the second arm 16 are The triangle formed between the host arms 18 is generally an isosceles triangle.

The first arm 14 includes a first portion 141, a second portion 142, and a third portion 143 that are sequentially connected. One end of the first portion 141 is connected to the host arm 18, the other end is connected to one end of the second portion 142; the other end of the second portion 142 is connected to one end of the third portion 143; The other end of the third portion 143 is rotatably coupled to the central portion 12. Preferably, the first portion 141 and the third portion 143 are substantially parallel. In the unfolded state, the first portion 141 and the third portion 143 are in different planes.

The quick release self-locking mechanism includes a latching portion 160 disposed on the second arm 16 and a latching portion 180 disposed on the host arm 18, through the latching portion 160 and the latching portion 180 The second arm 16 is locked to the main arm 18 by the cooperation. It can be understood that in other embodiments, the quick release self-locking mechanism can be any suitable detachable mating structure, for example, a buckle portion is disposed on the main arm 18 and the second arm 16 is disposed on the main arm 18 . The fastening portion is provided on the fastening portion, and the engagement manner is not limited to the buckle, such as interference, screwing, etc., as long as the second arm 16 can be detachably fixed to the main arm 18.

Referring to FIG. 1 and FIG. 3, the second portion 142 is not in line with the first portion 141 and the third portion 143, and is consistent with the first portion 141 and the third portion 143. The angle, for example, an obtuse angle greater than 90 degrees and less than 180 degrees, such that when the drone 1 is folded, the first portion 141 and the third portion 143 are in different planes. The structure of the first arm 14 is such that the central portion 12 and the main arm 18 are not in the same plane, and the central portion 12 and the main arm 18 interfere with each other when folding.

Please refer to FIG. 4 and FIG. 5 for a top view and a cross-sectional view of the frame assembly 10. In the top view of the folded state, the second arm 16 is folded over the back of the main arm 18 and is blocked by the main arm 18. The first arm 14 is folded inside the main arm 18 (i.e., on the side close to the central portion 12). In the folded state, the angle formed by the first portion 141 and the main arm 18 is smaller than the angle formed by the first portion 141 and the main arm 18 when in the unfolded state. In some embodiments, the first portion 141 is substantially parallel to the main body arm 18 and substantially conforms to the inner side of the main body arm 18 in the folded state, ie, the first portion 141 and the main body arm 18 The resulting angle is approximately zero or close to zero. The third portion 143 is substantially flush with the second arm 16 such that the central portion 12 respectively coupled to the first arm 14 and the second arm 16 is in the first The third portion 143 of the arm 14 and the second arm 16 are substantially parallel planes. In the folded state, the main arm 18 is located on a different plane from the third portion 143 and the second arm 16 , that is, in a different plane from the central portion 12 , and the plane in which the main arm 18 is located It may be located below the bottom of the central portion 12 or above the top of the central portion 12. The two mainframe arms 18 are adjacent to the two sides of the central portion 12, and the spacing between the two mainframe arms 18 in the folded state is smaller than the spacing between the two mainframe arms 18 in the unfolded state. In the folded state, the two first arms 14 are disposed substantially parallel between the two main arms 18, that is, the angle formed between the two first arms 14 is substantially zero. Compared with the unfolded state, the angle formed between the two first arms 14 in the folded state is smaller than the angle formed between the two first arms 14 in the unfolded state. In the folded state, the two second arms 16 are disposed substantially parallel to the outside of the third portion 143 of the two first arms 14, and the angle between the two second arms 16 is substantially zero. In the folded state, the distal ends of the two second arms 16 are disposed on the nose side of the drone 100, that is, the same as the first arm 14 is located at the central portion 12. side. It can be understood that when the first arm 14 is located at the tail side of the central portion 12, the distal ends of the two second arms 16 are also located at the center portion 12 in the folded state. The tail side. In the folded state, the spacing between the distal ends of the two second arms 16 is less than the spacing between the distal ends of the two second arms 16 in the deployed state. In some embodiments, the spacing between the distal ends of the two second arms 16 in the folded state is substantially equivalent to the width of the central portion 12 in a direction perpendicular to its roll axis.

In some embodiments, the first portion 141 is substantially parallel to the third portion 143. Since the first portion 141 is substantially parallel to the main arm 18 in the folded state, the third portion 143 is substantially parallel to the second arm 16 such that in the folded state, the two main arms 18 and the two are The second arms are substantially parallel and are located in different planes.

When unfolding from the folded state to the deployed state, the first arm 14 and the main arm 18 are first deployed to a predetermined position (the predetermined position may be the first when the rack assembly 10 is in the deployed state) The arm 14 and the position of the main arm 18 are located, and then the distal end of the second arm 16 is withdrawn from the buckle 120 of the central portion 12 and rotated around its proximal end to a designated position. (The designated position may be the position where the second arm 16 is located when the frame assembly 10 is in the deployed state), and finally the distal end of the second arm 16 is locked by the quick release self-locking mechanism. Mounted on the host arm 18 to complete deployment of the frame assembly 10.

Similarly, when the frame assembly 10 is folded, the distal end of the second arm 16 is first unlocked from the main arm 18 and the second arm 16 is rotated relative to the central portion 12. To a position substantially parallel to the main body arm 18, and the distal end of the second arm 16 is engaged with the buckle 120 of the central portion 12, and then the two main arms 18 are toward the center The portion 12 is close until it reaches the folded state. At this time, the first portion 141 of the first arm 14 is fitted inside the main arm 18, and the third portion 143 of the first arm 14 is substantially parallel to the second arm 16.

The main arm 18 is different from the third portion 143 and the second arm 16 of the first arm 14 when the first arm 14 is in a bent state such that the frame assembly 10 is folded. The plane avoids interference between the main arm 18 and the second arm 16 involving the host arm 18 and the central portion 12. And after folding, the first arm 14 and the second arm 16 are both defined within a width range defined by the two main arms 18, and the folded frame assembly width is substantially the same as the width of the central portion 12. Rather, the thickness is approximately equivalent to the thickness of the host arm 18 and the second arm 16 superimposed, and the volume is relatively small.

It can be understood that the quick release self-locking mechanism can also be a sleeve portion disposed on the second arm 16 , such as a semi-open sleeve portion, which is sleeved on the host arm 18 when in the unfolded state. The second arm 16 is disengaged from the main arm 18 when folded from the unfolded state to the folded state; and in the folded state, the second arm 16 is again set over The main arm 18 is secured in the folded state; when unfolded from the folded state to the unfolded state, the second arm 16 is disengaged from the main arm 18 and deployed to the designated position and then re-sleeve It is disposed on the main body arm 18 to be locked in the unfolded state.

Please refer to FIG. 6 and FIG. 7 , which are top views of the unmanned aerial vehicle frame assembly according to the second embodiment of the present invention. In contrast to the embodiments described above, the frame assembly also includes an auxiliary arm 15. The auxiliary arm 15 is connected at one end to the central portion 12 and at one end to the main arm 18. The number of the auxiliary arms 15 may be one, two, three or more. Preferably, the auxiliary arm 15 is substantially parallel to the first portion 141 and the third portion 143 of the first arm 14. The auxiliary arm 15 forms a link structure with the first arm 14 and the main arm 18 to assist in unfolding and folding of the first arm and the main arm. It will be appreciated that the auxiliary arm 15 may also be detachably secured to the main body arm 18 or the central portion 12 by a quick release self-locking mechanism for ease of deployment and folding.

It will be appreciated that in some embodiments, the second arm 16 may be omitted and the first arm 14 may be disposed at the geometric center of the host arm 18. A locking mechanism may be disposed between the central portion 12 and the first arm 14 and between the first arm 14 and the main arm 18 to lock the central portion 12 and the first The connection between the arms 14 and the connection between the first arm 14 and the host arm 18. It can be understood that, although the first arm 14 and the second arm 16 are respectively disposed at opposite ends of the main arm 18 in the embodiment shown in the drawings, in other embodiments, the first Both the arm 14 and the second arm 16 may be disposed in the middle of the main arm 18.

It will be appreciated that in some embodiments, the host arm 18 may be omitted and the power system may be disposed directly at the distal ends of the first arm 14 and the second arm 16.

In the above embodiment, the first arm 14, the second arm 16, and the auxiliary arm 15 may be referred to as a support arm, and the number of the support arms may not be limited to the implementation. The number in the example can be multiple. The mainframe arm 18 is coupled to the central portion 12 by the support arm. A plurality of support arms are symmetrically disposed about a roll axis of the center portion 12, and a plurality of the main arm arms 18 are also symmetrically disposed about a roll axis of the center portion 12.

It can be understood that, in the above embodiment, in the folded state, the buckle may be disposed on the main arm 18, and the second arm 16 may be engaged with the main arm 18 by a buckle to The second arm 16 is further stabilized in the folded state. It can be understood that the buckle 120 can be replaced with any other suitable fixing structure as long as the second arm 16 can be detachably fixed to the central portion 12 or the host arm 18. For example, the cooperation of the hook and the card slot.

In addition, those skilled in the art can make various other changes and modifications in accordance with the technical concept of the present invention, and all such changes and modifications are within the scope of the claims of the present invention.

Claims (48)

1.  A rack assembly for a drone, the rack assembly comprising a central portion and at least one first arm, one end of each of the first arms being coupled to the central portion, wherein: each The first arm includes a first portion, a third portion coupled to the central portion, and a second portion connecting the first portion and the third portion, the frame assembly being switchable between an expanded state and a folded state, wherein In the folded state, the first portion and the third portion are in different planes.
2.  The frame assembly of claim 1 wherein said first arms are two in number and said first arms are symmetrically disposed about a roll axis of said central portion.
3.  The frame assembly of claim 2 wherein the angle between the two first arms in the folded state is less than the angle in the deployed state.
4.  The frame assembly of claim 3 wherein said first arms are parallel to one another in said folded condition.
5.  The frame assembly of claim 3 wherein the angle of the two first arms is an obtuse angle in the deployed state.
6.  The frame assembly of claim 1 wherein said first portion is substantially parallel to said third portion.
7.  The rack assembly of claim 6 wherein said frame assembly further comprises a main arm, said first arm being rotatably coupled to said main arm at a distance from said other end of said central portion The end of the main arm is used to assemble a power system for providing thrust to the drone.
8.  The frame assembly of claim 7 wherein said plurality of mainframe arms are two and said two said mainframe arms are symmetrically disposed about a roll axis of said central portion.
9.  The frame assembly of claim 8 wherein said two said mainframe arms have a spacing in said folded condition that is less than a spacing in said deployed state.
10.  The frame assembly of claim 7 wherein said first portion is coupled to an inner side of said main body arm adjacent said central portion.
11.  The frame assembly of claim 10 wherein said first portion is located inside said main arm when in said folded condition.
12.  The frame assembly of claim 11 wherein said first portion is substantially parallel with said main body arm in said folded condition; said third portion being substantially parallel with said central portion.
13.  The frame assembly of claim 12 wherein said central portion is in a different plane than said host arm in said folded condition.
14.  A frame assembly according to claim 7, wherein in said folded state, said main body arm is located above a top of said central portion or below a bottom of said central portion.
15.  A frame assembly according to claim 7, wherein said frame assembly further comprises a second arm, one end of which is coupled to said central portion and the other end of which is detachably coupled to said main body On the arm.
16.  A frame assembly according to claim 15, wherein in said folded state, said second arm is disposed substantially parallel to said third portion on a side of said main arm.
17.  The frame assembly of claim 15 wherein said main arm and said second arm are in different planes in said deployed state.
18.  The frame assembly of claim 15 wherein said main arm and said second arm are parallel to one another in said folded condition.
19.  The frame assembly of claim 15 wherein said main arm and said second arm are located on two different planes in said folded condition.
20.  The frame assembly of claim 15 wherein said main arm forms a stable triangular mechanism with said first arm and said second arm in said deployed state.
21.  The frame assembly of claim 15 wherein said first arm and said second arm are coupled to a central portion of said main arm, respectively.
22.  The frame assembly of claim 15 wherein said first arm and said second arm are coupled to opposite ends of said mainframe arm, respectively.
23.  The frame assembly of claim 15 wherein said second arm is coupled to said mainframe arm by a quick release self-locking mechanism.
24.  A frame assembly according to claim 23, wherein said quick release self-locking mechanism comprises a fastening portion provided on one of said second arm and said main arm and is disposed in two The buckle on the other one.
25.  The frame assembly of claim 15 wherein said second arm is disengaged from said main arm when transitioning from said deployed state to said folded condition.
26.  The frame assembly of claim 15 wherein said second arm is detachably secured to said central portion or main body arm in said folded condition.
27.  The frame assembly according to claim 26, wherein said center portion or said main body arm is provided with a fixing structure, and in said folded state, said fixing structure is engaged with said second arm to be fixed The second arm is on the central portion or the host arm.
28.  The frame assembly of claim 15 wherein said second arms are two in number and said two second arms are symmetrically disposed about a roll axis of said central portion.
29.  The frame assembly of claim 1 wherein said frame assembly further comprises a second arm, said second arm being rotatably coupled to said central portion at one end and configured for providing at the other end The thrust is given to the power system of the drone.
30.  The frame assembly of claim 29, wherein the number of the second arms is two, and the two second arms are respectively located on opposite sides of the central portion, and the two are The distance of the end of the second arm away from the central portion in the folded state is smaller than the spacing in the deployed state.
31.  A frame assembly according to claim 29, wherein in said folded state, said two second arms are parallel to each other.
32.  The frame assembly of claim 29 wherein in the deployed state, the angle between the two of the second arms is an obtuse angle.
33.  A frame assembly according to claim 29, wherein in said folded state, said second arm and said first arm are both located on a side of said nose of said drone or said The tail side of the drone.
34.  The frame assembly of claim 1 wherein said frame assembly further comprises an auxiliary arm, said auxiliary arm being rotatably coupled to said central portion at one end and rotatably coupled to said other end On the main arm.
35.  The frame assembly of claim 34 wherein said auxiliary arm is substantially parallel to the first or third portion of said first arm.
36.  The frame assembly of claim 34 wherein said auxiliary arm is detachably coupled to said center portion or said main body arm by a quick release self-locking mechanism.
37.  A drone comprising a frame assembly and a power system, the power system being disposed on the frame assembly and for moving the drone, wherein the frame assembly is as claimed in claim 1 The rack assembly of any of 36.
38.  A rack assembly for a drone, characterized in that the rack assembly comprises:

    Central department;

    a plurality of support arms movably coupled to the center portion;

    a plurality of host arms are movably connected to the central portion through the plurality of support arms;

    Wherein a plurality of the support arms are operated to drive the plurality of host arms to move, so that the frame assembly can be switched between an unfolded state and a folded state; and the support arm is in the folded state A first angle between the respective one of the main arms is less than a second angle between the main body and the corresponding one of the main arms.
39.  A frame assembly according to claim 38, wherein said main body arm is located at a different plane from said central portion in said folded state
40.  38. The frame assembly of claim 38, wherein in the folded state, the plurality of support arms are in different planes than at least one of the main arm and the center portion.
41.  A frame assembly according to claim 38, wherein said plurality of support arms are symmetrically disposed about a roll axis of said central portion, said plurality of mainframe arms being symmetric about a roll axis of said central portion Settings.
42.  A frame assembly according to claim 40, wherein in the folded state, at least two arms symmetrically disposed about a roll axis of said central portion are located between said two symmetrically disposed host arms.
43.  A frame assembly according to claim 38, wherein in the folded state, said main body arm is located on the top of said central portion or below the bottom of said central portion.
44.  The frame assembly of claim 38 wherein at least one of the attachment of the support arm to the main arm and the central portion is achieved by a quick release self-locking mechanism when in the folded condition.
45.  A frame assembly according to claim 38, wherein at least two arms symmetrically disposed about a roll axis of said central portion are curved so that said arm is in said folded state A portion of the portion is located on a different plane than the other portion of the support arm.
46.  A frame assembly according to claim 38, wherein at least two of said mainframe arms symmetrically disposed about a roll axis of said central portion have a smaller pitch in said folded state than in said expanded state .
47.  A frame assembly according to claim 46, wherein in said folded state, a pitch between the arm members symmetrically disposed about a roll axis of said center portion does not exceed a roll around said center portion The spacing between the host arms that are arranged in an axisymmetric manner.
48.  An unmanned aerial vehicle comprising a frame assembly and a power system, the power system being disposed on the frame assembly and for moving the drone, wherein the frame assembly is in accordance with claim 38 The rack assembly of any of 47.

Images