Propeller device for an airborne mobile body

Abstract

The present invention relates to a propeller device of an airborne mobile body, which is arranged to fold the propeller when the airborne mobile body falls, thereby preventing additional accidents caused by fragments resulting from the propeller hitting the ground, and enabling the propeller to be reused by unfolding the folded propeller after the airborne mobile body lands.

Description

Technical Field

[0001] This disclosure relates to a propeller device for an airborne mobile body that can prevent injury and / or property damage caused by the propeller scattering when the airborne mobile body falls. Background Technology

[0002] Recently, air mobility vehicles (or “air mobility vehicles”) are being developed for various applications such as cargo container transport and medical transport, and air mobility vehicles with energy efficiency and stability have been developed, and air mobility vehicles are approaching the practical application stage.

[0003] Airborne mobile bodies fly by driving propellers, and must be stable in the event of a fall. Therefore, airborne mobile bodies selectively adjust the propeller drive to cope with fall situations, but there are no safety measures for the eventual descent of the airborne mobile body, i.e., the fall.

[0004] For example, when a moving object falls from the air, each rotating propeller hits the ground, and debris is generated and scattered when the high-speed rotating propeller hits the ground, thus creating the problem of secondary accidents.

[0005] The foregoing description of the background technology is intended only to help understand the background of this disclosure and is not intended to imply that this disclosure falls within the scope of prior art known to those skilled in the art. Summary of the Invention

[0006] This disclosure provides a propeller device for an airborne mobile body that can prevent additional accidents caused by the propeller scattering when the airborne mobile body falls.

[0007] The propeller assembly for achieving this purpose includes: a wing consisting of a fixed part and a rotating part that unfolds from or folds onto the fixed part; a hinge mechanism rotatably connected to the fixed part and the rotating part to have a first rotation center of the fixed part and a second rotation center of the rotating part, and providing a spring force that causes the rotating part to fold while rotating toward the fixed part; a movable rod spaced apart from the hinge mechanism and movably disposed therein, having a third rotation center that selectively matches the first and second rotation centers depending on the movement position of the movable rod; and a drive mechanism mounted on the fixed part and the rotating part, connected to the movable rod such that when the rotating part is unfolded, the third rotation center of the movable rod does not match the first and second rotation centers, and when folding of the rotating part is required, the movable rod is moved to match the third rotation center of the movable rod with the first and second rotation centers, thereby causing the rotating part to rotate by the spring force of the hinge mechanism.

[0008] The wing is configured such that the ends of the fixed part and the rotating part face each other, and each end of the fixed part and the rotating part has a plurality of matching openings, so that the hinge mechanism and the movable rod are arranged in the openings.

[0009] At each end of the fixed part and the rotating part, a guide extends from an opening with a movable rod in one of a plurality of openings, the movable rod being connected to the guide for movement on the guide.

[0010] One end and the other end of the movable rod are rotatably and movably connected to each guide of the fixed part and the rotating part, respectively.

[0011] Each opening extends beyond the rotation radius of the hinge mechanism and the movable rod.

[0012] The hinge mechanism includes: a hinge rod having a first rotation center at one end and connected to a fixed part, and a second rotation center at the other end and connected to a rotating part; and an elastic body disposed in the hinge rod to provide elastic force to the hinge rod in the direction of folding the rotating part.

[0013] The elastic body consists of one side elastic body connected to one end of the hinge rod and the fixed part, and the other side elastic body connected to the other end of the hinge rod and the rotating part, and the one side elastic body and the other side elastic body generate elastic force in the direction of the folding rotating part.

[0014] The drive mechanism is mounted on the fixed part and connected to one end of the movable rod, and the support mechanism connected to the other end of the movable rod is mounted on the rotating part.

[0015] The drive mechanism includes: a drive unit mounted on a fixed unit; a drive cam unit that rotates when the drive unit is operated; and a drive rod unit rotatably connected to one end of the drive cam unit and the movable rod to move the movable rod when the drive cam unit rotates.

[0016] The support mechanism includes: a connecting cam portion rotatably mounted on a rotating portion; and a connecting rod portion rotatably connected to the connecting cam portion and the other end of the movable rod to support the movable rod and guide the movable rod, which moves through the operation of the drive mechanism.

[0017] The drive mechanism consists of a first drive mechanism mounted on a fixed part and connected to one end of a movable rod, and a second drive mechanism mounted on a rotating part and connected to the other end of the movable rod.

[0018] The first drive mechanism includes: a first drive unit mounted on a fixed unit; a first cam unit that rotates when the first drive unit is operated; and a first rod unit rotatably connected to one end of the first cam unit and the movable rod to move the movable rod when the first cam unit rotates.

[0019] If multiple movable rods are provided, the number of first cam portions can be arranged to be the same as the number of movable rods, and each first cam portion is connected by a first connecting rod to be rotated simultaneously by a first drive portion.

[0020] The second drive mechanism includes: a second drive unit mounted on a rotating unit; a second cam unit that rotates when the second drive unit is operated; and a second rod unit rotatably connected to the other end of the second cam unit and the movable rod to move the movable rod when the second cam unit rotates.

[0021] If multiple movable rods are provided, the number of second cam sections can be arranged to be the same as the number of movable rods, and each cam section is connected by a second connecting rod so that it can be rotated simultaneously by the second drive section.

[0022] The rotating part is mounted to rotate upward from the fixed part via a hinge mechanism.

[0023] The drive mechanism is operated by the control unit, which moves the movable lever when a signal is received from the falling of an aerial moving object.

[0024] The propeller device of the airborne mobile body with the above structure can fold the propeller when the airborne mobile body falls, thereby preventing additional accidents caused by debris generated when the propeller hits the ground, and can reuse the propeller by unfolding the folded propeller after the airborne mobile body lands. Attached Figure Description

[0025] The above and other objects, features and other advantages of this disclosure will become more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0026] Figure 1 This is a diagram showing the propeller device of an airborne mobile body according to the present disclosure.

[0027] Figure 2 It is shown Figure 1 An exemplary embodiment of the hinge mechanism, movable rod, and drive mechanism of the propeller device of the airborne mobile body is shown in the figure.

[0028] Figure 3 This is a diagram showing the hinge mechanism.

[0029] Figure 4 This is a diagram showing the state of the movable lever and drive mechanism before operation.

[0030] Figure 5 It is a diagram showing the state of the movable lever and drive mechanism after operation.

[0031] Figure 6 This is a diagram showing the state of the rotating part rotating on the fixed part.

[0032] Figure 7 It is shown Figure 1 A diagram illustrating another exemplary embodiment of the hinge mechanism, movable rod, and drive mechanism of the propeller device of the airborne mobile body.

[0033] Figure 8 This is a diagram showing the state of the rotating part rotating on the fixed part. Detailed Implementation

[0034] It is understood that the terms "vehicle" or "of a vehicle" or other similar terms as used in this disclosure generally include motor vehicles, such as passenger cars including sport utility vehicles (SUVs), buses, trucks, various commercial vehicles, watercraft including various ships and vessels, aircraft, etc., and include hybrid vehicles, electric vehicles, plug-in hybrid vehicles, hydrogen-powered vehicles, and other vehicles using alternative fuels (e.g., fuels derived from resources other than petroleum). As referred to in this disclosure, a hybrid vehicle is a vehicle having two or more power sources, such as a gasoline-powered and an electric-powered vehicle.

[0035] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to limit the disclosure. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the” used in this disclosure are intended to include the plural forms as well. It will be further understood that the terms “comprising” and / or “including” as used in this specification describe the presence of said features, quantities, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, quantities, steps, operations, elements, components, and / or groups thereof. The term “and / or” as used in this disclosure includes any one and all combinations of one or more of the associated listed items. Throughout the specification, unless explicitly stated to the contrary, the word “comprising” and variations such as “including” or “including” will be understood to imply the inclusion of said elements rather than the exclusion of any other elements. Additionally, the terms “unit,” “device,” “component,” and “module” described in the specification refer to a unit for processing at least one function and operation, and can be implemented by hardware components or software components and combinations thereof.

[0036] Furthermore, the control logic of this disclosure can be implemented as a non-transitory computer-readable medium containing executable program instructions that are executed by a processor, controller, etc. Examples of computer-readable media include, but are not limited to, ROM, RAM, optical disc (CD)-ROM, magnetic tape, floppy disk, flash drive, smart card, and optical data storage device. The computer-readable medium can also be distributed across a networked computer system, thereby storing and executing the computer-readable medium in a distributed manner, for example, via a telematics server or a controller area network (CAN).

[0037] In the following description, a propeller device for an aerial mobile body according to a preferred exemplary embodiment of the present disclosure will be described with reference to the accompanying drawings.

[0038] Figure 1 This is a diagram illustrating the propeller assembly of an airborne mobile body according to the present disclosure. Figure 2 It is shown Figure 1 An exemplary embodiment of the hinge mechanism, movable rod, and drive mechanism of the propeller device of the airborne mobile body is shown in the figure. Figure 3 This is a diagram showing a hinge mechanism. Figure 4 This is a diagram showing the state of the movable lever and drive mechanism before operation. Figure 5 This is a diagram showing the state of the movable lever and drive mechanism after operation. Figure 6 This is a diagram showing the state of the rotating part rotating on the fixed part. Figure 7 It is shown Figure 1 A diagram illustrating another exemplary embodiment of the hinge mechanism, movable rod, and drive mechanism of the propeller device of the airborne mobile body, and... Figure 8 This is a diagram showing the state of the rotating part rotating on the fixed part.

[0039] like Figures 1 to 6 As shown, the propeller device of the airborne mobile body according to the present disclosure includes: a wing 100, comprising a fixed part 110 and a rotating part 120 that unfolds from or folds onto the fixed part 110; a hinge mechanism 200, rotatably connected to the fixed part 110 and the rotating part 120 having a first rotation center P1 of the fixed part 110 and a second rotation center P2 of the rotating part 120, and providing a spring force such that the rotating part 120 folds onto the fixed part while rotating toward the fixed part 110; and a movable rod 300, spaced apart from the hinge mechanism 200 and movably disposed, having a position depending on the movement of the movable rod 300. A third rotation center P3 selectively matches the first rotation center P1 and the second rotation center P2; and a drive mechanism 400, mounted on the fixed part 110 and the rotating part 120, connected to the movable rod 300 such that when the rotating part 120 is unfolded, the third rotation center P3 of the movable rod 300 does not match the first rotation center P1 and the second rotation center P2, and when the rotating part 120 is required to be folded, the movable rod 300 is moved so that the third rotation center P3 of the movable rod 300 matches the first rotation center P1 and the second rotation center P2, thereby causing the rotating part 120 to rotate by the elastic force of the hinge mechanism 200.

[0040] Multiple wings 100 can be mounted on the drive shaft X of the airborne mobile body, and a drive motor M is mounted on the drive shaft X to generate thrust when the wings 100 rotate via the rotation of the drive shaft X.

[0041] Specifically, the wing 100 according to this disclosure is composed of a fixed portion 110 and a rotating portion 120, with the rotating portion 120 either unfolded from or folded onto the fixed portion 110. In other words, if the rotating portion 120 unfolds from the fixed portion 110, the wing 100 generates thrust through rotation, and if the rotating portion 120 is folded onto the fixed portion 110, the overall length of the wing 100 is reduced, preventing the wing 100 from impacting the ground in the event of a landing accident.

[0042] For the folding operation of the wing 100, a hinge mechanism 200 is mounted on the fixed portion 110 and the rotating portion 120, thus the rotating portion 120 rotates via the hinge mechanism 200. In other words, the hinge mechanism 200 has a first rotation center P1 of the fixed portion 110 and a second rotation center P2 of the rotating portion 120, so the rotating portion 120 can rotate on the fixed portion 110 through each rotation center. Furthermore, since the hinge mechanism 200 provides a spring force that causes the rotating portion 120 to fold onto the fixed portion 110 while rotating toward the fixed portion 110, the rotating portion 120 can rotate toward the fixed portion 110.

[0043] Here, the rotating part 120 can be folded while rotating toward the fixed part 110 via the movable rod 300 and the drive mechanism 400.

[0044] In other words, the movable rod 300 is configured to be spaced apart from the hinge mechanism 200 and has a third rotation center P3 that selectively matches the first rotation center P1 and the second rotation center P2 according to the moving position of the movable rod 300.

[0045] The movable rod 300 is connected to a drive mechanism 400 mounted on the fixed part 110 and the rotating part 120, such that the movable rod 300 moves according to the operation of the drive mechanism 400, causing the rotating part 120 to selectively rotate relative to the fixed part 110. In other words, when the rotating part 120 is extended from the fixed part 110, the hinge mechanism 200 does not rotate because the third rotation center P3 of the movable rod 300 does not match the first rotation center P1 of the fixed part 110 and the rotation center P2 of the rotating part 120. Here, as the drive mechanism 400 is operated and the movable rod 300 moves, if the third rotation center P3 of the movable rod 300 matches the first rotation center P1 and the second rotation center P2 of the hinge mechanism 200, then the rotation center of the movable rod 300 matches the rotation center of the hinge mechanism 200. Therefore, the movable rod 300 and the rotating part 120 can rotate. Therefore, the rotating part 120 can rotate by the elastic force of the hinge mechanism 200, and therefore, the rotating part 120 can be folded.

[0046] The aforementioned drive mechanism 400 can be operated by a control unit, causing the movable rod 300 to move upon receiving a signal generated by the falling of an aerial mobile object. In other words, the drive mechanism 400 is operated under the control of the control unit, which collects information such as the height and tilt angle of the aerial mobile object using various sensors installed in the aerial mobile object to determine whether the aerial mobile object has fallen. Therefore, when it is determined that the aerial mobile object has fallen, the control unit transmits the signal generated by the falling aerial mobile object to the drive mechanism 400, causing the drive mechanism 400 to operate. As a result, the movable rod 300 moves to fold the rotating part 120 via the hinge mechanism 200.

[0047] Furthermore, the rotating part 120 can be mounted to rotate upward from the fixed part 110 via the hinge mechanism 200. According to this disclosure, the rotating part 120 folds in the event of a falling aerial vehicle, and air flows upward when the aerial vehicle falls. Therefore, the rotating part 120 is mounted to rotate upward from the fixed part 110 via the hinge mechanism 200, allowing for rapid folding of the rotating part 120 in the event of a falling aerial vehicle. Therefore, this disclosure can prevent accidents caused by debris scattering due to the wing 100 impacting the ground or by the rotation of the wing 100 during an aerial vehicle fall.

[0048] In the present disclosure described above, the wing 100 is configured such that the end of the fixed part 110 and the end of the rotating part 120 face each other, and the respective ends of the fixed part 110 and the rotating part 120 are formed with a plurality of matching openings H, so that the hinge mechanism 200 and the movable rod 300 can be provided in the openings H.

[0049] like Figure 2 As shown, the ends of the fixing part 110 and the rotating part 120 are positioned facing each other, and the ends of the fixing part 110 and the rotating part 120 are respectively formed with a plurality of matching openings H. Each opening H is provided with a hinge mechanism 200 and a movable rod 300, so the fixing part 110 and the rotating part 120 are rotatably connected by the hinge mechanism 200 and the movable rod 300.

[0050] Here, at each end of the fixed part 110 and the rotating part 120, a guide part H1 extends from an opening H among a plurality of openings H in which a movable rod 300 is provided. The movable rod 300 is connected to the guide part H1 for movement on the guide part H1. The guide part H1 is formed in the opening H in which the movable rod 300 is provided, and each guide part H1 of the fixed part 110 and the rotating part 120 is formed to extend linearly in the state in which the rotating part 120 is deployed.

[0051] Furthermore, one end of the movable rod 300 is rotatably and movably connected to each guide portion H1 of the fixed portion 110 and the rotating portion 120, respectively. In other words, since the movable rod 300 can move and rotate on each guide portion H1 of the fixed portion 110 and the rotating portion 120, the rotating portion 120 can be rotated by the rotational operation of the movable rod 300 and the rotating portion 120 to fold onto the fixed portion 110.

[0052] In other words, the movable rod 300 can move linearly along the guide H1, and when the movable rod 300 moves and the third rotation center P3 of the movable rod 300 matches the first rotation center P1 and the second rotation center P2 of the hinge mechanism 200, the rotating part 120 rotates together with the movable rod 300, so the rotating part 120 can be folded.

[0053] On the other hand, each opening H can extend to be longer than the rotation radius of the hinge mechanism 200 and the rotation radius of the movable rod 300. Therefore, since the hinge mechanism 200 and the movable rod 300 will not interfere with the fixed part 110 or the rotating part 120 when the rotating part 120 is rotated, the rotating part 120 can rotate smoothly in the direction of folding or unfolding the rotating part 120.

[0054] On the other hand, such as Figure 3 As shown, the hinge mechanism 200 includes: a hinge rod 210, one end of which has a first rotation center P1 and is connected to the fixed part 110, and the other end of which has a second rotation center P2 and is connected to the rotating part 120; and an elastic body 220 disposed in the hinge rod 210 to provide elastic force to the hinge rod 210 in the direction of folding the rotating part 120.

[0055] As described above, the hinge mechanism 200 consists of a hinge rod 210 and an elastic body 220. One end of the hinge rod 210 is connected to the fixed part 110, and the other end is connected to the rotating part 120. Therefore, the rotating part 120 can rotate on the fixed part 110 via the hinge rod 210. Furthermore, the hinge rod 210 is provided with an elastic body 220 that provides elastic force to each of the fixed part 110 and the rotating part 120. Therefore, the rotating part 120 can rotate in the direction of folding the rotating part 120 by the elastic force of the elastic body 220.

[0056] Here, the elastic body 220 is composed of an elastic body 221 connected to one end of the hinge rod 210 and one side of the fixing part 110, and an elastic body 222 connected to the other end of the hinge rod 210 and the other side of the rotating part 120, and the elastic body 221 and the elastic body 222 generate elastic force in the direction of the folding rotating part 120.

[0057] As described above, since the elastic body 220 is composed of an elastic body 221 on one side and an elastic body 222 on the other side, the hinge rod 210 can rotate on the fixed part 110 via the elastic body 221 on one side, and the rotating part 120 can rotate on the hinge rod 210 via the elastic body 222 on the other side. In other words, since the elastic body 221 on one side and the elastic body 222 on the other side generate elastic force in the direction of the folding rotating part 120, when the rotating part 120 is folded, the hinge rod 210 rotates via the elastic force of the elastic body 221 on one side, and the rotating part 120 rotates on the hinge rod 210 at the same time. Therefore, the rotating part 120 rotates in the folding direction to be folded. Here, in order to make the folding operation of the rotating part 120 smooth, the elastic body 221 on one side can be formed to have a stronger elastic force than the elastic body 222 on the other side.

[0058] On the other hand, the drive mechanism 400 according to this disclosure can be applied in various exemplary embodiments.

[0059] As a first exemplary embodiment, such as Figure 2 As shown, the drive mechanism 400 can be mounted on the fixed part 110 and connected to one end of the movable rod 300, and the support mechanism 500 connected to the other end of the movable rod 300 can be mounted on the rotating part 120.

[0060] In other words, the drive mechanism 400, mounted on the fixed part 110, is connected to one end of the movable rod 300, thus the movable rod 300 moves when the drive mechanism 400 is operated. Furthermore, the support mechanism 500 is mounted on the rotating part 120 and connected to the other end of the movable rod 300, thus the movable rod 300, which moves via the drive mechanism 400, is supported by the support mechanism 500. As described above, one end and the other end of the movable rod 300 are supported by the drive mechanism 400 and the support mechanism 500 respectively, therefore, the movable rod 300 can move smoothly when the drive mechanism 400 is operated, and the rotating part 120 can be securely connected to the fixed part 110 via the movable rod 300, the drive mechanism 400, and the support mechanism 500.

[0061] Specifically, the drive mechanism 400 includes: a drive part 410, mounted on the fixed part 110; a drive cam part 420, which rotates when the drive part 410 is operated; and a drive rod part 430, which is rotatably connected to one end of the drive cam part 420 and the movable rod 300, so as to move the movable rod 300 when the drive cam part 420 rotates.

[0062] Here, the drive unit 410 can be a rotary motor, and when the drive unit 410 operates, it drives the cam unit 420 to rotate, thereby moving the drive rod unit 430. In other words, one end 430A of the drive rod unit 430 is rotatably connected to the drive cam unit 420, and the other end 430B is rotatably connected to the movable rod 300, such that when the drive unit 410 is operated, the movable rod 300 is moved by pushing it. Therefore, in the state where the drive rod unit 430 is connected to the upper or lower end of the drive cam unit 420, the initial position of the drive rod unit 430 rotates and moves toward the movable rod 300 when the drive unit 410 is operated, thereby moving the movable rod 300.

[0063] On the other hand, the support mechanism 500 includes: a connecting cam portion 510, rotatably mounted on the rotating portion 120; and a connecting rod portion 520, rotatably connected to the connecting cam portion 510 and the other end of the movable rod 300, to support the movable rod 300 and guide the movable rod 300 which moves through the operation of the drive mechanism 400.

[0064] The connecting cam portion 510 is rotatably mounted on the rotating portion 120 and is formed in the same circular shape as the driving cam portion 420. One end of the connecting rod portion 520 is rotatably connected to the connecting cam portion 510, and the other end of the connecting rod portion 520 is rotatably connected to the other end of the movable rod 300, thereby guiding the movement of the movable rod 300.

[0065] Therefore, the drive unit 410 of the drive mechanism 400 operates, and the drive rod 430 moves when the drive cam 420 rotates, and the movable rod 300 moves together. The movement of the movable rod 300 is guided by the connecting rod 520 and the connecting cam 510 of the support mechanism 500 provided on the rotating part 120. Therefore, the movable rod 300 can move linearly.

[0066] On the other hand, as another exemplary embodiment, such as Figure 7 As shown, the drive mechanism 400 consists of a first drive mechanism 400A mounted on the fixed part 110 and connected to one end of the movable rod 300, and a second drive mechanism 400B mounted on the rotating part 120 and connected to the other end of the movable rod 300.

[0067] In other words, a first drive mechanism 400A mounted on the fixed part 110 is connected to one end of the movable rod 300, and a second drive mechanism 400B mounted on the rotating part 120 is connected to the other end of the movable rod 300. Therefore, the movable rod 300 moves through the operation of the first drive mechanism 400A and the second drive mechanism 400B. Thus, the movable rod 300 connects the fixed part 110 to the rotating part 120 via the first drive mechanism 400A and the second drive mechanism 400B, and moves when the first drive mechanism 400A and the second drive mechanism 400B are operated. Furthermore, since multiple drive mechanisms 400 are provided to provide force for moving the movable rod 300, the movable rod 300 can be moved precisely.

[0068] Therefore, the first drive mechanism 400A includes: a first drive part 410A, mounted on the fixed part 110; a first cam part 420A, which rotates when the first drive part 410A is operated; and a first rod part 430A, which is rotatably connected to one end of the first cam part 420A and the movable rod 300, so as to move the movable rod 300 when the first cam part 420A rotates.

[0069] Here, the first drive unit 410A can be a rotary motor, and when the first drive unit 410A operates, the first cam unit 420A rotates to move the first rod unit 430A. In other words, one end of the first rod unit 430A is rotatably connected to the first cam unit 420A, and the other end is rotatably connected to one end of the movable rod 300, so that the movable rod 300 is moved by pushing it when the first drive unit 410A is operated. Therefore, in the state where the first rod unit 430A is connected to the upper or lower end of the first cam unit 420A, the initial position of the first rod unit 430A rotates and moves toward the movable rod 300 when the first drive unit 410A operates, causing the movable rod 300 to move.

[0070] Here, if multiple movable rods 300 are provided, the number of first cam portions 420A can be arranged to be the same as the number of movable rods 300, and each first cam portion 420A is connected by a first connecting rod 440A to be rotated simultaneously by a first drive portion 410A.

[0071] As described above, if multiple movable rods 300 are provided, multiple first cam portions 420A are also formed to have the same number as the movable rods 300, and the multiple first cam portions 420A are connected by first connecting rods 440A to rotate simultaneously. Therefore, when the first drive unit 410A transmits rotational force to any one of the first cam portions 420A, the remaining first cam portions 420A rotate simultaneously due to their connection via the first connecting rods 440A, allowing the multiple movable rods 300 to move simultaneously.

[0072] On the other hand, the second drive mechanism 400B includes: a second drive part 410B, mounted on the rotating part 120; a second cam part 420B, which rotates when the second drive part 410B is operated; and a second rod part 430B, which is rotatably connected to the other end of the second cam part 420B and the movable rod 300, so as to move the movable rod 300 when the second cam part 420B rotates.

[0073] Here, the second drive unit 410B may be a rotary motor, and when the second drive unit 410B operates, the second cam unit 420B rotates to move the second rod unit 430B. The second drive unit 410B is configured to operate in the same direction as the first drive unit 410A, such that the force of the first drive unit 410A and the force of the second drive unit 410B move the movable rod 300 in one direction.

[0074] One end of the second rod portion 430B is rotatably connected to the second cam portion 420B, and the other end is rotatably connected to the other end of the movable rod 300, so that the movable rod 300 is moved by pushing it when the second drive portion 410B is operated. Therefore, when the second rod portion 430B is connected to the upper or lower end of the second rod cam portion 420B, the initial position of the second rod portion 430B rotates and moves toward the movable rod 300 when the second drive portion 410B is operated, causing the movable rod 300 to move.

[0075] Here, if multiple movable rods 300 are provided, the number of second cam portions 420B can be arranged to be the same as the number of movable rods 300, and each second cam portion is connected by a second connecting rod 440B to be rotated simultaneously by the second drive portion 410B.

[0076] As described above, if multiple movable rods 300 are provided, multiple second cam portions 420B are also formed to have the same number as the movable rods 300, and the multiple second cam portions 420B are connected by second connecting rods 440B to rotate simultaneously. Therefore, when the second drive unit 410B transmits rotational force to any one of the second cam portions 420B, the remaining second cam portions 420B rotate simultaneously due to their connection via the second connecting rods 440B, allowing the multiple movable rods 300 to move simultaneously.

[0077] The operation of the propeller device of the airborne mobile body according to this disclosure will now be described.

[0078] like Figure 1 As shown, the initial state of the wing 100 is when the rotating part 120 is deployed from the fixed part 110.

[0079] At this time, as Figure 4As shown, each third rotation center P3 of the movable rod 300 does not match the first rotation center P1 and the second rotation center P2 of the hinge mechanism 200. Therefore, the rotation of the hinge mechanism 200 is restricted by the movable rod 300, thereby keeping the rotating part 120 unfolded from the fixed part 110.

[0080] In this state, when a signal generated by the falling airborne object is input to the drive mechanism 400, the movable rod 300 moves in response to the operation of the drive mechanism 400. In other words, as... Figure 5 As shown, when the movable rod 300 moves with the operation of the drive mechanism 400, each third rotation center P3 of the movable rod 300 matches the first rotation center P1 and the second rotation center P2 of the hinge mechanism 200, respectively. Therefore, when the hinge rod 210 forming the hinge mechanism 200 is allowed to rotate, the hinge rod 210 rotates on the fixed part 110 by the elastic force of the elastic body 220, while the rotating part 120 rotates on the hinge rod 210. Thus, the rotating part 120 rotates to fold onto the fixed part 110.

[0081] As mentioned above, such as Figure 8 As shown, when the rotating part 120 is folded, the overall length of the wing 100 is reduced, thereby preventing additional accidents caused by debris generated when the wing 100 hits the ground.

[0082] On the other hand, after the airborne mobile body lands, if the rotating part 120 is rotated in the direction of unfolding from the fixed part 110 by overcoming the elastic force of the elastic body 220, the wing part 100 can return to its initial position. Therefore, the propeller can be reused by unfolding the folded rotating part 120 from the fixed part 110 of the wing part 100.

[0083] The propeller device of the airborne mobile body with the above structure can fold the propeller when the airborne mobile body falls, thereby preventing additional accidents caused by debris generated when the propeller hits the ground, and can reuse the propeller by unfolding the folded propeller after the airborne mobile body lands.

[0084] Although specific exemplary embodiments of the present disclosure have been shown and described, it will be apparent to those skilled in the art that various modifications and changes may be made to the present disclosure without departing from the technical spirit of the present disclosure as provided in the appended claims.

Claims

1. A propeller device for an aerial mobile vehicle, comprising: The wing is composed of a fixed part and a rotating part that unfolds from or folds onto the fixed part; A hinge mechanism is rotatably connected to the fixed part and the rotating part to have a first rotation center of the fixed part and a second rotation center of the rotating part, and provides elasticity so that the rotating part folds while rotating toward the fixed part; A movable rod, spaced apart from the hinge mechanism to be movably disposed, and having a third rotation center that selectively matches the first rotation center and the second rotation center according to the moving position of the movable rod; as well as A drive mechanism, mounted on the fixed part and the rotating part, is connected to the movable rod such that when the rotating part is unfolded, the third rotation center of the movable rod does not match the first rotation center and the second rotation center, and when the rotating part is required to be folded, the movable rod is moved so that the third rotation center of the movable rod matches the first rotation center and the second rotation center, thereby causing the rotating part to rotate by the elastic force of the hinge mechanism.

2. The propeller device for an aerial mobile body according to claim 1, wherein, The wing is configured such that the ends of the fixed part and the rotating part face each other, and each end of the fixed part and the rotating part forms a plurality of matching openings, and the hinge mechanism and the movable rod are disposed in the plurality of openings.

3. The propeller device for an aerial mobile body according to claim 2, wherein, At each end of the fixed part and the rotating part, a guide extends from an opening in one of the plurality of openings, which is provided with the movable rod, the movable rod being connected to the guide for movement on the guide.

4. The propeller device for an aerial mobile body according to claim 3, wherein, One end and the other end of the movable rod are rotatably and movably connected to each of the guide portions of the fixed portion and the rotating portion, respectively.

5. The propeller device for an aerial mobile body according to claim 2, wherein, One of the plurality of openings extends beyond the rotation radius of the hinge mechanism and the rotation radius of the movable rod.

6. The propeller device for an aerial mobile body according to claim 1, wherein, The hinge mechanism includes: A hinge rod, having a first rotation center at one end and connected to the fixed part, and a second rotation center at the other end and connected to the rotating part; and An elastomer is disposed in the hinge rod to provide elastic force to the hinge rod in the direction of folding the rotating part.

7. The propeller device for an aerial mobile body according to claim 6, wherein, The elastic body consists of an elastic body on one side connected to one end of the hinge rod and the fixed part, and an elastic body on the other side connected to the other end of the hinge rod and the rotating part, and the elastic body on one side and the elastic body on the other side generate elastic force in the direction of folding the rotating part.

8. The propeller device for an aerial mobile body according to claim 1, wherein, The drive mechanism is mounted on the fixed part and connected to one end of the movable rod, and the support mechanism is mounted on the rotating part and connected to the other end of the movable rod.

9. The propeller device for an aerial mobile body according to claim 8, wherein, The drive mechanism includes: The drive unit is mounted on the fixed unit; A drive cam portion that rotates during operation of the drive portion; and A drive rod is rotatably connected to one end of the drive cam and the movable rod, so as to move the movable rod when the drive cam rotates.

10. The propeller device for an aerial mobile body according to claim 8, wherein, The supporting structure includes: A connecting cam portion is rotatably mounted on the rotating portion; and A connecting rod portion is rotatably connected to the connecting cam portion and the other end of the movable rod to support the movable rod and guide the movable rod, which moves through the operation of the drive mechanism.

11. The propeller device for an aerial mobile body according to claim 1, wherein, The drive mechanism consists of a first drive mechanism mounted on the fixed part and connected to one end of the movable rod, and a second drive mechanism mounted on the rotating part and connected to the other end of the movable rod.

12. The propeller device for an airborne mobile body according to claim 11, wherein, The first driving mechanism includes: A first driving unit is mounted on the fixed unit; The first cam portion rotates when the first drive portion is operated; and A first lever portion is rotatably connected to one end of the first cam portion and the movable lever, so as to move the movable lever when the first cam portion rotates.

13. The propeller device for an aerial mobile body according to claim 12, wherein, If multiple movable rods are provided, the number of first cam portions is arranged to be the same as the number of movable rods, and each first cam portion is connected by a first connecting rod to be rotated simultaneously by the first drive portion.

14. The propeller device for an airborne mobile body according to claim 11, wherein, The second drive mechanism includes: A second drive unit is mounted on the rotating part; The second cam rotates when the second drive unit operates; and The second rod is rotatably connected to the second cam and the other end of the movable rod, so as to move the movable rod when the second cam rotates.

15. The propeller device for an airborne mobile body according to claim 14, wherein, If multiple movable rods are provided, the number of the second cam portions is arranged to be the same as the number of the movable rods, and each cam portion is connected by a second connecting rod so that it can be rotated simultaneously by the second drive portion.

16. The propeller device for an aerial mobile body according to claim 1, wherein, The rotating part is mounted to rotate upward from the fixed part via the hinge mechanism.

17. The propeller device for an aerial mobile body according to claim 1, wherein, The drive mechanism is operated by the control unit to move the movable rod when a signal generated by the falling of the aerial mobile body is received.

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