Extensible structure easy to drive and large in folding-unfolding ratio and solar charging device

Abstract

The invention relates to the field of solar charging devices, and particularly discloses an easy-to-drive large-folding-and-unfolding-ratio extensible structure and a solar charging device.The easy-to-drive large-folding-and-unfolding-ratio extensible structure comprises two Mipu paper folding mechanisms which are arranged in an axial symmetry mode, and further comprises a main driving mechanism and a lateral supporting mechanism; the main driving mechanism is used for driving the two Mipu paper folding mechanisms to synchronously fold and unfold in the direction of the symmetry axis, and the lateral supporting mechanism is used for providing lateral supporting for the Mipu paper folding mechanisms and guiding the Mipu paper folding mechanisms to synchronously fold and unfold in the lateral direction while the Mipu paper folding mechanisms fold and unfold in the direction of the symmetry axis; the solar charging device comprises an extensible structure which is easy to drive and large in folding-unfolding ratio. The deployable structure has the advantages of being easy to drive and large in folding and unfolding ratio, the solar charging device based on the deployable structure is applied to the rotor wing type unmanned aerial vehicle, and the charging convenience of the unmanned aerial vehicle can be improved.

Description

Technical Field

[0001] The present application relates to the field of solar charging devices, and in particular to an easily driven, large folding / expanding ratio expandable structure and a solar charging device. Background Art

[0002] With the development of science and technology, drones can replace people to perform tasks in dangerous, dirty and confined spaces. Among them, rotorcraft drones are widely used in agriculture, military, disaster relief, inspection and other tasks because of their advantages such as being able to hover and take off without a run-up. However, the current charging method of drones is one of the main factors limiting the promotion and application of drones.

[0003] Solar cells can directly convert solar energy into electricity to supply drones, which can achieve ultra-long flight time or even unlimited flight time. However, solar cells are rarely used in rotary-wing drones. The main reason is that solar panels need to be unfolded during charging to obtain the largest possible photosensitive area. When flying and not charging, solar panels should be folded as small as possible to reduce air resistance and be easy to store. Therefore, designing a solar panel structure with a large fold-to-expansion ratio and easy-to-drive characteristics will hopefully promote the application and promotion of solar cells on drones, enable drones to perform tasks with ultra-long flight time, and greatly expand the activity radius and application range of drones. Summary of the invention

[0004] In order to improve the problem that solar panels are currently difficult to apply to rotary-wing UAVs, the present application provides an easily driven, large-folding-to-extending ratio deployable structure and a solar charging device.

[0005] The present application provides an easily-driven, large folding / expanding ratio deployable structure that adopts the following technical solution: An easily driven, large folding / expanding ratio deployable structure comprising: Two Miura origami mechanisms, arranged in axisymmetric fashion; A main driving mechanism is arranged along the symmetry axis of the two Miura origami mechanisms, and is used to drive the two Miura origami mechanisms to fold and unfold synchronously along the direction of the symmetry axis; A lateral support mechanism is arranged at the edge of the Miura origami mechanism along a direction perpendicular to the axis of symmetry, and is used to provide lateral support to the Miura origami mechanism, and to guide the Miura origami mechanism to perform synchronous lateral folding while the Miura origami mechanism is folded and unfolded along the direction of the axis of symmetry.

[0006] Furthermore, each of the Miura origami mechanisms comprises a plurality of origami units arranged in an array, wherein the origami units are in a quadrilateral shape, and a flexible hinge is connected between two adjacent origami units, and the folds around each of the origami units comprise a peak fold and three valley folds or a valley fold and three peak folds.

[0007] Driven by external force, the flexible hinge in the Miura origami mechanism undergoes twisting or bending deformation, so that after the Miura origami mechanism is folded, the flexible hinge has prestress; after the external force is removed, the Miura origami mechanism can automatically unfold under the prestress of the flexible hinge.

[0008] When the main drive mechanism drives the two Miura origami mechanisms to fold or stretch synchronously along the direction of the symmetry axis, the lateral support mechanism synchronously guides the Miura origami mechanism to fold or stretch laterally, so as to ensure the synchronization of folding and stretching of all origami units as much as possible; at the same time, the lateral support mechanism provides lateral support for the Miura origami mechanism, which helps to prevent the free end of the Miura origami mechanism from sagging due to its own gravity.

[0009] The deployable structure provided in the present application is based on the Miura origami mechanism, and has a large folding and unfolding ratio. The projected area is small in the folded state, and large in the unfolded state. The folding and unfolding of the Miura origami mechanism can be realized by a single drive. Furthermore, the main driving mechanism includes two relatively arranged scissor-type telescopic frames, and a plurality of connecting rods are hinged between the two scissor-type telescopic frames, so that the two scissor-type telescopic frames can be telescoped synchronously; each of the scissor-type telescopic frames includes a plurality of scissor-type units hinged at the head and tail, and each of the scissor-type units includes two cross-hinged rods, and the rods are fixedly connected to one side of the paper folding unit; the main driving mechanism also includes a driving assembly for driving the scissor-type telescopic frames to extend and retract.

[0010] When the driving component drives the scissor-type telescopic frame to extend or contract, the Miura origami mechanism connected to the scissor-type telescopic frame is unfolded or folded accordingly.

[0011] Furthermore, the driving assembly includes a plurality of pulleys spaced apart along the telescopic direction of the scissors-type telescopic frame, and the pulleys are rotatably connected to the connecting rod; the driving assembly also includes a traction rope wound around the plurality of pulleys, and a driving member for winding and unwinding the traction rope is provided at the free end of the traction rope.

[0012] When the driving member drives the traction rope to reel in, the traction rope cooperates with multiple pulleys to drive the scissor-type telescopic frame to contract, and then drives the Miura origami mechanism to fold; when the driving member drives the traction rope to unwind, the Miura origami mechanism automatically unfolds under the prestressed action of the flexible hinge.

[0013] Furthermore, the diameter of the pulley increases gradually from the middle to the end of the scissor-type telescopic frame; the free end of the traction rope is wound around the pulley at the two ends of the scissor-type telescopic frame to the pulley in the middle of the scissor-type telescopic frame.

[0014] The diameters of the multiple pulleys are gradually arranged, so that when the free end of the traction rope is wound from the pulleys at both ends of the scissor-type telescopic frame to the pulley in the middle, the rope segments of the traction rope will not interfere with each other.

[0015] Furthermore, the easy-to-drive large folding / expanding ratio expandable structure also includes a bracket for supporting the main driving mechanism, a connecting rod in the middle of the main driving mechanism passes through the bracket, and the bracket is provided with a sliding groove in the vertical direction for the other connecting rod to slide; the driving member is fixedly arranged on the bracket.

[0016] The bracket provides a mounting carrier for the easily driven large folding and unfolding ratio expandable structure. When the main driving mechanism is extended or retracted, a connecting rod in the main driving mechanism slides along a vertical slide groove on the bracket.

[0017] Furthermore, the lateral support mechanism comprises a scissor-type telescopic frame, the telescopic direction of which is perpendicular to the telescopic direction of the main drive mechanism, and the rod in the lateral support mechanism is fixedly connected to the folding unit at the edge of the Miura folding mechanism.

[0018] When the main driving mechanism drives the Miura origami mechanism to fold and unfold along the direction of the symmetry axis, the lateral scissor-type telescopic frame synchronously extends and retracts to guide the Miura origami mechanism to fold and unfold laterally, thereby ensuring the synchronization of the folding and unfolding of all origami units as much as possible; at the same time, the lateral scissor-type telescopic frame provides lateral support for the Miura origami mechanism, which helps to prevent the free end of the Miura origami mechanism from sagging due to its own gravity.

[0019] Furthermore, a limit rope is connected between two adjacent paper-folding units to limit the maximum unfolding angle of the two adjacent paper-folding units and prevent the Miura paper-folding mechanism from being completely flattened.

[0020] The maximum unfolding angle of two adjacent origami units is limited by the limit rope, which further supports the Miura origami mechanism and prevents the Miura origami mechanism from being completely flattened or even sagging under its own gravity, thereby improving the stability of the unfoldable structure in the unfolded state.

[0021] The present application also provides a solar charging device, including an easy-to-drive, large folding-expansion ratio expandable structure, each of the origami units is fixedly provided with a solar cell unit, and a plurality of the solar cell units are connected in series and parallel to achieve a preset voltage and power output.

[0022] The present application also provides a rotor-type UAV, including a solar charging device.

[0023] Due to the large folding and unfolding ratio, when a solar charging device based on an easy-to-drive large folding and unfolding ratio deployable structure is applied to a rotary-wing UAV, the solar charging device has a larger area when unfolded, which increases the photosensitive area and has a higher sunlight utilization rate; the projected area is smaller in the folded state, and the air resistance caused by the solar charging device is smaller during the take-off of the UAV. This improves the problem that solar panels are difficult to apply to rotary-wing UAVs, so that the UAV does not need to return to charge or stop at a fixed place for charging, which greatly broadens the operating range of the UAV.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. The solar charging device provided by the present application has a large folding and unfolding ratio, and a small projected area in the folded state. When applied to a rotary-wing UAV, the air resistance caused by the solar charging device during the take-off of the UAV is small; 2. The solar charging device provided in this application has a large deployment area, increases the photosensitive area, and has a high sunlight utilization rate; 3. The folding and unfolding of the solar charging device provided by the present application can be simply realized by a single drive, which greatly reduces the weight of the drive required to fold and unfold the solar charging device; 4. In the solar charging device provided by the present application, the solar panels and the scissor beams are of regular shapes, and the flexible hinges have uniform shapes, and the manufacturing error sensitivity is low, which is suitable for mass production and large-scale promotion; 5. The solar charging device provided in this application is applied to a rotary-wing UAV, so that the UAV does not need to return for charging or stop at a fixed place for charging, which greatly broadens the operating range of the UAV. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall structure of an easily-driven, large folding / expanding ratio deployable structure according to Example 1 of the present application; Figure 2 Schematic diagram of the origami unit and flexible hinge of the Miura origami mechanism in Example 1 of the present application; Figure 3 It is a schematic diagram of the origami principle of the Miura origami mechanism in Example 1 of the present application; Figure 4 is a structural schematic diagram of the main driving mechanism in Example 1 of the present application; Figure 5 is a schematic diagram of the connection structure between the rod and the origami unit in Example 1 of the present application; Figure 6 1 is a schematic diagram of the structure of the driving assembly in Example 1 of the present application, wherein (a) is a front view, (b) is a top view, and (c) is a partial schematic diagram mainly used to show the traction rope and the pulley; Figure 7is a structural schematic diagram of the lateral support mechanism in Example 1 of the present application; Figure 8 It is a partial schematic diagram mainly used to show the limiting ropes between adjacent origami units in Example 1 of the present application; Fig. 9 This is a schematic diagram of a rotary-wing UAV according to Example 3 of the present application.

[0026] Figure numerals: 1. Miura origami mechanism; 11. origami unit; 12. flexible hinge; 13. peak crease; 14. valley crease; 15. limit rope; 2. main drive mechanism; 3. lateral support mechanism; 4. scissors-type telescopic frame; 41. rod; 411. mounting groove; 412. screw; 42. connecting rod; 5. pulley; 6. traction rope; 7. bracket; 71. slide groove; 72. mounting seat; 8. motor. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-9 This application is described in further detail.

[0028] Example 1 This embodiment discloses an easily driven, large folding / expanding ratio deployable structure. Figure 1 The easy-to-drive large folding and unfolding ratio expandable structure comprises two Miura origami mechanisms 1 arranged in an axisymmetric manner; a main driving mechanism 2 is arranged along the symmetry axis of the two Miura origami mechanisms 1, and is used to drive the two Miura origami mechanisms 1 to fold and unfold synchronously along the symmetry axis direction. A lateral supporting mechanism 3 is arranged along the edge of the Miura origami mechanism 1 in a direction perpendicular to the symmetry axis, and is used to provide lateral support to the Miura origami mechanism 1, and guide the Miura origami mechanism 1 to perform synchronous lateral folding and unfolding while the Miura origami mechanism 1 is folded and unfolded along the symmetry axis direction.

[0029] Reference Figure 1 and Figure 2 , the Miura origami mechanism 1 can be made of spring steel or plastic and manufactured by 3D printing. Each Miura origami mechanism 1 includes a plurality of origami units 11 arranged in an array, and the origami units 11 are quadrilateral. In this embodiment, each Miura origami mechanism 1 includes 12×5 origami units 11 arranged in an array. In other feasible embodiments, the size and number of the origami units 11 can be adjusted according to actual needs.

[0030] Reference Figure 3, the origami unit 11 adjacent to the axis of symmetry is trapezoidal, and the other origami units 11 are rhombus-shaped. The smaller the acute angle of the rhombus-shaped origami unit 11, the smaller the folding and unfolding ratio, and the better the linkage; the larger the acute angle of the rhombus-shaped origami unit 11, the larger the folding and unfolding ratio, and the worse the linkage. In order to take into account the folding and unfolding ratio and the linkage of the Miura origami mechanism 1, the acute angle of the rhombus-shaped origami unit 11 can be set to 60°-80°. As a preferred example, the acute angle of the rhombus-shaped origami unit 11 is set to 75°.

[0031] Reference Figure 2 and Figure 3 A flexible hinge 12 is connected between two adjacent origami units 11 (i.e., at the folds), and the folds around each origami unit 11 include a peak fold 13 ( Figure 3 The red lines in the figure) and the three valley creases 14 ( Figure 3 In this embodiment, refer to Figure 2 The flexible hinge 12 is obtained by cutting a number of straight lines between adjacent origami units 11 .

[0032] Driven by external force, the flexible hinge 12 in the Miura origami mechanism 1 is twisted or bent, so that after the Miura origami mechanism 1 is folded, the flexible hinge 12 has prestress; after the external force is removed, the Miura origami mechanism 1 can be automatically unfolded under the prestress of the flexible hinge 12. The expandable structure provided in this embodiment is based on the Miura origami mechanism 1, has a large folding and unfolding ratio, has a small projected area in the folded state, and has a large area when unfolded.

[0033] In order to drive the two Miura origami mechanisms 1 to fold and unfold synchronously along the symmetry axis, refer to Figure 4 The main driving mechanism 2 includes two scissor-type telescopic frames 4 arranged opposite to each other, and a plurality of connecting rods 42 are hinged between the two scissor-type telescopic frames 4, so that the two scissor-type telescopic frames 4 can be extended and retracted synchronously. Each scissor-type telescopic frame 4 includes a plurality of scissor-type units hinged end to end, and each scissor-type unit includes two cross-hinged rods 41. That is, each scissor-type telescopic frame 4 includes two mutually hinged rod columns, and each rod column includes a plurality of rods 41 hinged end to end. The rods 41 can be made of 3D printed plastic parts.

[0034] Each scissor-type telescopic frame 4 in the main driving mechanism 2 is fixedly connected to the Miura folding mechanism 1 on the same side. Specifically, in a rod column of each scissor-type telescopic frame 4, a plurality of rods 41 are alternately fixedly connected to one side of the corresponding folding unit 11. The connection between the rod 41 and the folding unit 11 is as follows: Figure 5As shown, a cantilever portion extends from one side of the paper folding unit 11, and a mounting groove 411 for inserting the cantilever portion is opened on the rod 41. At least two screws 412 are threadedly connected to the rod 41, and the screws 412 pass through the cantilever portion of the paper folding unit 11, thereby fixing the paper folding unit 11 to the rod 41.

[0035] The main driving mechanism 2 also includes a driving assembly for driving the scissor-type telescopic frame 4 to extend and retract. Figure 4 and Figure 6 The driving assembly includes a plurality of pulleys 5 spaced apart along the telescopic direction of the scissor-type telescopic frame 4, and the pulleys 5 are rotatably connected to the connecting rod 42 at the center of the scissor-type telescopic frame 4. Figure 6 In (c), the driving assembly also includes a traction rope 6 wound around a plurality of pulleys 5, and a driving member for winding and unwinding the traction rope 6 is provided at the free end of the traction rope 6, and the driving member is a motor 8; the output end of the motor 8 is connected to the free end of the traction rope 6, and the other end of the traction rope 6 is fixed to the pulley 5 at the end.

[0036] When the motor 8 drives the traction rope 6 to reel in, the traction rope 6 cooperates with the multiple pulleys 5 to drive the multiple pulleys 5 to approach each other, the scissor-type telescopic frame 4 to contract, and then drives the Miura origami mechanism 1 to fold; based on the principle of the movable pulley 5, the energy efficiency is high during the contraction of the scissor-type telescopic frame 4. When the motor 8 reverses to drive the traction rope 6 to unwind, the Miura origami mechanism 1 automatically unfolds under the prestress of the flexible hinge 12. The present application can realize the folding and unfolding of the Miura origami mechanism 1 through a single drive, which can effectively reduce the weight of the drive device and provide the possibility for the lightweight application of the deployable structure.

[0037] Further, refer to Figure 6 , the diameter of the pulley 5 increases from the middle to the end of the scissor-type telescopic frame 4; the free end of the traction rope 6 is wound from the pulleys 5 at both ends of the scissor-type telescopic frame 4 to the pulley 5 in the middle of the scissor-type telescopic frame 4. The diameters of the multiple pulleys 5 are gradually set, so that when the free end of the traction rope 6 is wound from the pulleys 5 at both ends of the scissor-type telescopic frame 4 to the pulley 5 in the middle, the rope segments of the traction rope 6 will not interfere with each other.

[0038] Reference Figure 4 The easy-to-drive large folding and unfolding ratio expandable structure further includes a bracket 7 for supporting the main driving mechanism 2. A connecting rod 42 in the middle of the main driving mechanism 2 runs through the top of the bracket 7. The bracket 7 is provided with a slide groove 71 in the vertical direction for another connecting rod 42 to slide. A mounting seat 72 for mounting the motor 8 is also fixedly provided on the bracket 7. The bracket 7 provides a mounting carrier for the easy-to-drive large folding and unfolding ratio expandable structure. When the main driving mechanism 2 is extended or retracted, one connecting rod 42 in the main driving mechanism 2 slides along the vertical slide groove 71 on the bracket 7.

[0039] In order to provide lateral support to the Miura origami mechanism 1 and improve the synchronization of folding and unfolding, refer to Figure 1 This embodiment further provides a lateral support mechanism 3, whose telescopic direction is perpendicular to the telescopic direction of the main drive mechanism 2. Figure 1 Only the installation position of the lateral support mechanism 3 is shown, and the specific lateral support mechanism 3 is not shown. Four lateral support mechanisms 3 are provided, and are respectively located on four sides perpendicular to the main drive mechanism 2.

[0040] Specifically, the lateral support mechanism 3 includes a scissor-type telescopic frame 4, such as Figure 7 As shown, its structure is the same as the single scissor-type telescopic frame 4 in the main driving mechanism 2, except that it does not include a driving component. The scissor-type telescopic frame 4 of the lateral support mechanism 3 is fixedly connected to the side of the Miura folding mechanism 1. Specifically, in a rod column of the scissor-type telescopic frame 4, a plurality of rods 41 are alternately fixedly connected to one side of the corresponding folding unit 11. The connection method of the rod 41 and the folding unit 11 is the same as described above, refer to Figure 5 .

[0041] When the main driving mechanism 2 drives the Miura origami mechanism 1 to fold and unfold along the symmetry axis, the four lateral support mechanisms 3 are synchronously extended and retracted to guide the Miura origami mechanism 1 to fold and unfold laterally, thereby ensuring the synchronization of the folding and unfolding of all the origami units 11 as much as possible. At the same time, the lateral support mechanisms 3 provide lateral support for the Miura origami mechanism 1, which helps to prevent the free end of the Miura origami mechanism 1 from sagging due to its own gravity.

[0042] In order to limit the maximum unfolding angle of two adjacent folding units 11 and prevent the Miura folding mechanism 1 from being completely flattened, refer to Figure 8 A limit rope 15 is connected between two adjacent origami units 11. The limit rope 15 limits the maximum unfolding angle of two adjacent origami units 11, further supporting the Miura origami mechanism 1, preventing the Miura origami mechanism 1 from being completely flattened or even sagging under its own gravity, thereby improving the stability of the Miura origami mechanism 1 in the unfolded state.

[0043] Example 2 This embodiment provides a solar charging device, including an easy-to-drive large folding and unfolding ratio expandable structure provided in embodiment 1, wherein a solar cell unit is fixedly arranged on the upper end surface of each folding unit 11, and multiple solar cell units are connected in series and parallel to achieve a preset voltage and power output. This embodiment provides a solar charging device that can be conveniently folded and unfolded, such as Figure 1 As shown, it is not completely flattened when unfolded, and the overall shape is a positive "V" shape.

[0044] Since an easily driven large folding-expansion ratio expandable structure has a large folding-expansion ratio, the solar charging device provided in this embodiment has a larger area when unfolded, increases the photosensitive area, and has a higher sunlight utilization rate; the projected area is smaller in the folded state, which makes it possible to use it on rotorcraft drones.

[0045] Example 3 This embodiment provides a rotary-wing UAV, including a UAV body, such as Fig. 9 As shown, the drone body is installed with a solar charging device provided in Example 2. The solar charging device can be installed on the drone body through the bracket 7 in the easy-to-drive large folding and unfolding ratio deployable structure.

[0046] The solar charging device based on the easy-to-drive large folding and unfolding ratio expandable structure has a larger area when unfolded, which increases the photosensitive area and has a higher utilization rate of sunlight; the projected area is smaller in the folded state, and the air resistance caused by the solar charging device is smaller during the take-off of the drone. And because the folding drive method is simple, the weight of the driver that drives the folding and unfolding of the solar charging device is reduced. This improves the problem that solar panels are difficult to apply to rotary-wing drones, so that drones do not need to return to charge or stop at a fixed place for charging, which greatly broadens the operating range of drones.

[0047] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An easily driven, large folding / expanding ratio deployable structure, characterized in that: include: Two Miura origami mechanisms, arranged in axisymmetric fashion; A main driving mechanism is arranged along the symmetry axis of the two Miura origami mechanisms, and is used to drive the two Miura origami mechanisms to fold and unfold synchronously along the direction of the symmetry axis; A lateral support mechanism is arranged at the edge of the Miura origami mechanism along a direction perpendicular to the axis of symmetry, and is used to provide lateral support to the Miura origami mechanism, and to guide the Miura origami mechanism to perform synchronous lateral folding while the Miura origami mechanism is folded and unfolded along the direction of the axis of symmetry.

2. The easily-driven, large folding / expanding ratio deployable structure according to claim 1, characterized in that: Each of the Miura origami mechanisms comprises a plurality of origami units arranged in an array, wherein the origami units are quadrilateral, and a flexible hinge is connected between two adjacent origami units, and the folds around each origami unit comprise a peak fold and three valley folds or a valley fold and three peak folds.

3. The easily-driven, large folding / expanding ratio deployable structure according to claim 2, characterized in that: The main driving mechanism includes two scissor-type telescopic frames arranged opposite to each other, and a plurality of connecting rods are hinged between the two scissor-type telescopic frames, so that the two scissor-type telescopic frames can be telescoped synchronously; each of the scissor-type telescopic frames includes a plurality of scissor-type units hinged at the head and tail, and each of the scissor-type units includes two cross-hinged rods, and the rods are fixedly connected to one side of the paper folding unit; the main driving mechanism also includes a driving component for driving the scissor-type telescopic frames to telescope.

4. The easily-driven, large folding / expanding ratio deployable structure according to claim 3, characterized in that: The driving assembly includes a plurality of pulleys spaced apart along the telescopic direction of the scissor-type telescopic frame, and the pulleys are rotatably connected to the connecting rod; the driving assembly also includes a traction rope wound around the plurality of pulleys, and a driving member for winding and unwinding the traction rope is provided at the free end of the traction rope.

5. The easily-driven, large folding / expanding ratio deployable structure according to claim 4, characterized in that: The diameter of the pulley increases from the middle to the end of the scissor-type telescopic frame; the free end of the traction rope is wound from the pulleys at both ends of the scissor-type telescopic frame to the pulley in the middle of the scissor-type telescopic frame.

6. The easily-driven, large folding / expanding ratio deployable structure according to claim 4, characterized in that: The easy-to-drive, large folding / expanding ratio expandable structure also includes a bracket for supporting the main driving mechanism, a connecting rod in the middle of the main driving mechanism passes through the bracket, and the bracket is provided with a sliding groove in the vertical direction for the other connecting rod to slide; the driving member is fixedly arranged on the bracket.

7. The easily-driven, large folding / expanding ratio deployable structure according to claim 3, characterized in that: The lateral support mechanism comprises a scissor-type telescopic frame, the telescopic direction of which is perpendicular to the telescopic direction of the main drive mechanism, and the rod in the lateral support mechanism is fixedly connected to the folding unit at the edge of the Miura folding mechanism.

8. The easily-driven, large folding / expanding ratio deployable structure according to claim 2, characterized in that: A limit rope is connected between two adjacent paper-folding units to limit the maximum unfolding angle of the two adjacent paper-folding units and prevent the Miura paper-folding mechanism from being completely flattened.

9. A solar charging device, characterized in that: It comprises an easily driven, large folding / expanding ratio expandable structure as described in any one of claims 2-8, wherein each of the origami units is fixedly provided with a solar cell unit, and a plurality of the solar cell units are connected in series and parallel to achieve a preset voltage and power output.

10. A rotary-wing UAV, characterized in that: A solar charging device comprising the solar charging device described in claim 9.

Images