Foldable rack and drone

Abstract

The present application discloses a foldable frame and a UAV. The frame includes: a fuselage; a connecting arm, which is connected to the fuselage and can rotate between an unfolded position and a folded position; and a rotating member and a fixed member, the rotating member is mounted on the connecting arm, and the fixed member is mounted on the fuselage; one of the rotating member and the fixed member is a magnet that can generate a magnetic field, and the other is a magnet or a ferromagnetic material that can be attracted by a magnet. When the connecting arm rotates, under the interaction between the rotating member and the fixed member, the connecting arm can rotate to an unfolded or folded position and maintain in this position. The present application can be applied to the field of UAV technology. The connecting arm can rotate and drive the rotor or the gimbal to unfold or fold. After the rotor is folded, it is convenient for the transportation of the UAV, and at the same time, it can avoid collision and damage of the rotor. After the gimbal is unfolded, the camera device can avoid the interference of the landing gear, and realize interference-free panoramic photography; under the action of the magnetic field force of the rotating member and the fixed member, the connecting arm can keep the rotor or the gimbal in the unfolded or folded position.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicles, and in particular to a foldable frame and a unmanned aerial vehicle comprising the frame. Background Art

[0002] The existing UAV aircraft has an outwardly extending connecting shaft connected to the fuselage, and the rotor is usually installed on the connecting shaft, which makes the overall size of the UAV larger and inconvenient to transport; and the rotor is easily hit and damaged during transportation. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a foldable frame, which can be used for a UAV, and the rotor can be folded to facilitate the transportation of the UAV and avoid damage.

[0004] In order to achieve the purpose of the present invention, an embodiment of the present invention provides a foldable frame, the frame comprising:

[0005] body;

[0006] a connecting arm connected to the fuselage and rotatable relative to the fuselage between an unfolded position and a folded position; and

[0007] a rotating member and a fixed member, wherein the rotating member is configured to be mounted on the connecting arm, and the fixed member is configured to be mounted on the fuselage;

[0008] Among them, one of the rotating part and the fixed part is a magnet that can generate a magnetic field, and the other is a magnet or a ferromagnetic material that can be attracted by a magnet. When the connecting arm rotates, under the interaction between the rotating part and the fixed part, the connecting arm can automatically rotate to the unfolded position or the folded position and maintain this position.

[0009] The foldable frame of this embodiment has a connecting arm connected to the fuselage and capable of rotating relative to the fuselage, so that the connecting arm can rotate relative to the fuselage between a deployed position and a folded position. In this way, when the frame is used for a drone, the connecting arm can drive the rotor to rotate to the deployed position to facilitate the flight of the drone and aerial photography; when the connecting arm drives the rotor to rotate to the folded position, the rotor can be folded up to reduce the size of the drone and facilitate transportation. After the rotor is folded up, the rotor can be prevented from being hit or damaged.

[0010] A rotating part is provided on the connecting arm, and a fixed part is provided on the fuselage, and one of the rotating part and the fixed part is a magnet capable of generating a magnetic field, and the other is a magnet or a ferromagnetic material capable of being attracted by a magnet, so that a magnetic force can be generated between the rotating part and the fixed part, and the magnetic force can cause the connecting arm to automatically rotate to an extended position or a folded position, and keep the connecting arm in the extended position or the folded position motionless, maintaining it in the extended position or the folded position, so as to fix the extended or folded rotor.

[0011] The connecting arm is maintained in the unfolded position or the folded position by the magnetic force between the rotating member and the fixing member. The structure is simple, easy to install, easy to implement and low in cost.

[0012] Optionally, the rotating member and the fixed member are disposed adjacent to each other, and in the unfolded position or the folded position, the magnetic force between the rotating member and the fixed member is in the axial direction, and maintains the connecting arm in the unfolded position or the folded position;

[0013] During the rotation of the connecting arm, the magnetic force between the rotating member and the fixed member can generate a magnetic restoring force along the circumferential direction, and the magnetic restoring force can cause the connecting arm to return to the unfolded position or the folded position.

[0014] The rotating member and the fixed member are arranged adjacent to each other, and when the connecting arm is in the extended position or the folded position, the magnetic force between the rotating member and the fixed member is in the axial direction, so that the connecting arm can be maintained in the extended position or the folded position; during the rotation of the connecting arm, the magnetic force between the rotating member and the fixed member can be decomposed into a magnetic restoring force in the circumferential direction, and the connecting arm rotates under the action of the magnetic restoring force in the circumferential direction and returns to the folded or extended position.

[0015] Optionally, the rotating member and the fixed member are both magnets, the magnets include at least one N-pole portion and at least one S-pole portion, and when the number of N-pole portions or S-pole portions is greater than one, the N-pole portions and the S-pole portions are alternately arranged.

[0016] The rotating part and the fixed part are both magnets, and each magnet includes an N-pole portion and an S-pole portion, and the N-pole portion and the S-pole portion in the magnet are alternately arranged.

[0017] In the unfolded state, the rotating part and the fixed part are in a state of opposite poles attracting each other, so that the connecting arm can be stably maintained in the unfolded state. When the connecting arm in the unfolded position needs to be folded, an external force is applied to the connecting arm to drive it to rotate. During the rotation process, the rotating part and the fixed part will experience a process from opposite poles attracting each other to like poles repelling each other. In this process, the circumferential component of the magnetic force between the rotating part and the fixed part is opposite to the direction of its rotation, so it is necessary to apply an external force to overcome the circumferential component; the connecting arm continues to rotate, and at this time the circumferential component of the magnetic force between the rotating part and the fixed part is the same as the direction of its rotation, and the circumferential component can promote the automatic rotation of the connecting arm, and the external force can be withdrawn at this time; when the automatic rotation of the connecting arm causes the rotating part and the fixed part to go from like poles repelling each other to like poles attracting each other, the automatic rotation of the connecting arm stops, and the connecting arm is in the folded position at this time. Under the action of the magnetic attraction, the connecting arm can be stably maintained in the folded state.

[0018] Among them, when the connecting arm is in the expanded position or the folded position, if the connecting arm shakes, the magnetic restoring force along the circumferential direction generated by the magnetic attraction enables the connecting arm to automatically return to the expanded position or the folded position, so that the connecting arm can be stably maintained in the expanded state or the folded state.

[0019] The process of the connecting arm rotating from the folded position to the unfolded position is similar to the above process.

[0020] When the connecting arm rotates between the folded position and the unfolded position, the magnetic force between the first magnet unit and the second magnet unit can help it rotate, so as to unfold or fold the rotor of the drone.

[0021] Optionally, a first magnetic conductive shell is disposed outside the rotating member, the first magnetic conductive shell has a first opening, and the first opening faces the fixed member;

[0022] A second magnetic conductive shell is disposed outside the fixing member. The second magnetic conductive shell has a second opening, and the second opening faces the rotating member.

[0023] Because the magnetic field interferes with certain electronic components of the drone, a magnetic conductive shell is made of magnetic conductive material to shield the magnetic field, thereby reducing interference and improving the performance of the electronic components. In addition, an opening is opened on the magnetic conductive shell, and the opening of the first magnetic conductive shell outside the rotating part is directed toward the fixed part, and the opening of the second magnetic conductive shell outside the fixed part is directed toward the rotating part, so as to ensure that there is a magnetic force between the rotating part and the fixed part, so that the connecting arm can rotate under the action of the magnetic force.

[0024] Optionally, a connecting member is fixed on the fixing member, and a protrusion is provided on one of the connecting arm and the connecting member, and a groove matching the protrusion is provided on the other, and the side walls on both sides of the groove are inclined outward, and the inclined side walls can decompose the axial magnetic force into a component force along the circumferential direction.

[0025] One of the connecting arm and the connecting member (fixed with the fixing member) is provided with a protrusion, and the other is provided with a groove matched with the protrusion, and the side walls on both sides of the groove are inclined outward. The arrangement of the inclined side walls enables the magnetic force along the axial direction between the relatively arranged rotating member and the fixing member to be decomposed into a force component in the direction perpendicular to the side wall and a force component in the direction of the side wall. The force component in the direction of the side wall can be decomposed into a force component in the circumferential direction. The force component in the circumferential direction can promote the rotation of the connecting arm during the rotation of the connecting arm, so as to facilitate the unfolding and folding of the connecting arm. At the same time, when the connecting arm is in the unfolded position or the folded position, the force component in the circumferential direction can also prevent the rotation of the connecting arm, so that the connecting arm can automatically return to the unfolded position or the folded position when shaking.

[0026] When in the unfolded position or the folded position, the protrusion is located in the groove, so that the connecting arm can be stably maintained in the unfolded or folded state.

[0027] Optionally, a first magnetic conductive shell is disposed outside the rotating member, the first magnetic conductive shell has a first opening, and the first opening faces the fixed member;

[0028] The connecting member is a second magnetic conductive shell disposed outside the fixing member, the second magnetic conductive shell has a second opening, and the second opening faces the rotating member;

[0029] The groove is provided on the end surface of the first magnetic conductive shell adjacent to the fixed member, and the protrusion is provided on the end surface of the second magnetic conductive shell adjacent to the rotating member.

[0030] The arrangement of the first magnetic shell and the second magnetic shell can shield the magnetic field and prevent the magnetic field from interfering with certain electronic components of the drone, while not affecting the magnetic force between the rotating part and the fixed part, so that the connecting arm can rotate under the action of the magnetic force; the protrusion and the groove are respectively arranged on the first magnetic shell and the second magnetic shell, which is convenient for processing; the connecting part is used to set the protrusion and has the function of shielding the magnetic field, which can reduce the number of components and simplify the structure.

[0031] Optionally, at least two grooves are provided and are evenly arranged along the circumference of the first magnetic conductive shell;

[0032] At least two protrusions are provided and are evenly arranged along the circumference of the second magnetic conductive shell.

[0033] Optionally, an axial connecting rod is provided on one of the first magnetic conductive shell and the connecting arm, and an axial mounting hole is provided on the other, the axial connecting rod extends into the axial mounting hole and can move in the axial mounting hole, and an elastic element is provided between the end surface of the first magnetic conductive shell away from the fixing member and the connecting arm;

[0034] Alternatively, the second magnetically conductive shell is connected to the body and can move axially relative to the body, and an elastic element is provided between the end surface of the second magnetically conductive shell away from the rotating member and the body.

[0035] During the rotation of the connecting arm, there are two states: the protrusion is located in the groove and the protrusion is against the end face of the second magnetic shell. Between the two states, axial relative displacement occurs between the first magnetic shell and the second magnetic shell. Therefore, it can be arranged that the first magnetic shell can move axially relative to the connecting arm, or the second magnetic shell can move axially relative to the fuselage. An elastic element is provided between the first magnetic shell and the connecting arm or between the second magnetic shell and the fuselage. When axial relative displacement occurs between the first magnetic shell and the second magnetic shell, the elastic element is deformed to ensure that during the rotation of the connecting arm, the first magnetic shell and the second magnetic shell are always in contact and no axial shaking occurs between the two.

[0036] Optionally, the frame further includes a base, the base is configured to be fixed to the body, the connecting arm is rotatably connected to the base, and the fixing member is mounted on the base.

[0037] When the frame includes a base, the connecting arm can be rotatably connected to the base, the fixing part can be installed on the base, and then the base can be fixed to the fuselage, and the rotation of the connecting arm relative to the fuselage can also be achieved; in addition, the setting of the base avoids the need to set fixing parts on the fuselage, and it is only necessary to fix the base to the fuselage, which reduces the modification of the fuselage, so that the frame can be used on various drones, thereby improving the applicability of the foldable frame.

[0038] Optionally, an embodiment of the present invention further provides a drone, comprising a rotor and a foldable frame as described in any of the above embodiments, wherein one end of a connecting arm of the frame is rotatably connected to the fuselage, and the other end is connected to the rotor.

[0039] The rotor of the drone of this embodiment is connected to the fuselage through a foldable frame, so that the rotor can be rotated to unfold or fold. In this way, when the drone is in use, the rotor can be unfolded to facilitate the flight of the drone and aerial photography; when the drone is transported, the rotor can be folded to reduce the size of the drone, facilitate transportation, and prevent the rotor from colliding or being damaged during transportation.

[0040] Optionally, an embodiment of the present invention further provides a drone, comprising a gimbal and the foldable frame described in any of the above embodiments, wherein one end of a connecting arm of the frame is rotatably connected to the fuselage, and the other end is connected to the gimbal.

[0041] The drone of this embodiment has a gimbal connected to the fuselage via a foldable frame, so that the gimbal can be rotated to unfold or fold. In this way, when the drone is used for aerial photography, the frame can be rotated to unfold so that the camera device fixed on the gimbal is lower than the landing gear, so as to effectively avoid interference from the landing gear and achieve undisturbed panoramic photography of the camera device.

[0042] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0043] The foldable frame provided by the embodiment of the present invention has a connecting arm that can rotate under the action of the magnetic force between the rotating part and the fixed part and maintain the connecting arm in the unfolded position or the folded position. In this way, when the rotor is connected to the fuselage of the drone by using the frame, the rotor can be rotated to unfold or fold. After the rotor is folded, it is convenient to transport the drone and prevent the rotor from colliding or being damaged during transportation. When the gimbal is connected to the fuselage of the drone by using the frame, the gimbal can be rotated to unfold or fold. After the gimbal is unfolded, the camera device on the gimbal can avoid the interference of the landing gear, thereby realizing interference-free panoramic photography of the camera device.

[0044] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0046] Figure 1 A schematic structural diagram of a foldable frame according to an embodiment of the present invention;

[0047] Figure 2 yes Figure 1 A side structural schematic diagram of a foldable frame shown;

[0048] Figure 3 yes Figure 1 A schematic diagram of the exploded structure of the foldable frame shown;

[0049] Figure 4 for Figure 1A cross-sectional structural schematic diagram of a foldable frame shown;

[0050] Figure 5 for Figure 3 Schematic diagram of the structure of the rotating parts;

[0051] Figure 6 for Figure 1 The schematic diagram of the changing states of the rotating parts and the fixed parts of the foldable frame during the rotation process shown;

[0052] Figure 7 for Figure 3 A schematic structural diagram of the first magnetic conductive shell;

[0053] Figure 8 is a schematic diagram of the exploded structure of a foldable frame according to another embodiment of the present invention;

[0054] Fig. 9 for Figure 8 A schematic structural diagram of the first magnetic conductive shell;

[0055] Fig.10 for Figure 8 Schematic diagram of the structure of the second magnetic conductive shell.

[0056] in, Figure 1-Figure 10 The relationship between the reference numerals and the component names is as follows:

[0057] 1 connecting arm, 10 axial mounting hole, 2-1, 2-2 base, 3 rotating part, 30 N pole part, 31 S pole part, 4 fixing part, 40 N pole part, 41 S pole part, 5 first magnetic conductive shell, 50 groove, 51 axial connecting rod, 6 second magnetic conductive shell, 60 protrusion, 7 rotating shaft, 8 elastic pad. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other arbitrarily without conflict.

[0059] Embodiment 1:

[0060] This embodiment provides a foldable frame, which can be used for a drone. Specifically, Figure 1-Figure 3 As shown, the frame includes a body, a connecting arm 1, a rotating part 3 and a fixing part 4.

[0061] One end of the connecting arm 1 is connected to the fuselage of the UAV and can rotate relative to the fuselage, and the other end can be configured to be connected to a rotor or the like of the UAV.

[0062] When the connecting arm 1 rotates relative to the fuselage, it can drive the rotor to rotate to the deployed position and the folded position. In this way, when the connecting arm drives the rotor to rotate to the deployed position, the rotor can work normally, so that the UAV can fly and take aerial photos; when the connecting arm drives the rotor to rotate to the folded position, the rotor can be folded up to reduce the size of the UAV for easy transportation, and after the rotor is folded up, it can prevent the rotor from being hit or damaged.

[0063] The rotating member 3 is mounted on the connecting arm 1, and the fixing member 4 is configured to be mounted on the fuselage. In addition, one of the rotating member 3 and the fixing member 4 is a magnet capable of generating a magnetic field, and the other is a magnet or a ferromagnetic material capable of being attracted by a magnet. When the connecting arm 1 rotates, under the interaction of the rotating member 3 and the fixing member 4, the connecting arm 1 can automatically rotate to an unfolded position or a folded position relative to the fuselage and maintain the unfolded position or the folded position.

[0064] A rotating part 3 is provided on the connecting arm 1, and a fixing part 4 is provided on the fuselage, and one of the magnetic elements in the rotating part 3 and the fixing part 4 is a magnet capable of generating a magnetic field, and the other is a magnet or a ferromagnetic material capable of being attracted by a magnet, and the ferromagnetic material is a material containing one or more of iron, cobalt, and nickel. In this way, a magnetic force can be generated between the rotating part 3 and the fixing part 4, and the magnetic force can automatically rotate the connecting arm 1 to the unfolded position or the folded position, and keep the connecting arm 1 in the unfolded position or the folded position immobile, and maintain it in the unfolded position or the folded position, so as to fix the unfolded or folded rotor.

[0065] The connecting arm 1 is maintained in the unfolded position or the folded position by the magnetic force between the rotating member 3 and the fixing member 4. The structure is simple, easy to install, easy to implement, and low in cost.

[0066] Alternatively, if Figure 4 As shown, the rotating member 3 and the fixing member 4 are arranged adjacent to each other. When the connecting arm 1 is in the unfolded position or the folded position, the magnetic force between the rotating member 3 and the fixing member 4 is in the axial direction, and the axial magnetic force maintains the connecting arm 1 in the unfolded position or the folded position; during the rotation of the connecting arm 1, the magnetic force between the rotating member 3 and the fixing member 4 can generate a component force in the circumferential direction, and the component force in the circumferential direction can be a magnetic restoring force, so that the connecting arm 1 returns to the unfolded position or the folded position, and the component force in the circumferential direction can also help the rotation of the connecting arm 1 to realize the folding or unfolding of the connecting arm 1.

[0067] The magnetic force between the rotating member 3 and the fixed member 4 can generate a component force along the circumferential direction by the following method.

[0068] Alternatively, if Figure 5As shown, the rotating member 3 and the fixed member 4 are both magnets, and the magnets include at least one N-pole portion and at least one S-pole portion, and when the number of the N-pole portion and the S-pole portion are both one, the N-pole portion and the S-pole portion are arranged in sequence along the circumference, and when the number of the N-pole portion or the S-pole portion is greater than one, the N-pole portion and the S-pole portion are alternately arranged along the circumference to form a cycle of NSNS... Specifically, in this embodiment, the rotating member 3 includes 4 N-pole portions 30 and 4 S-pole portions 31, and the 4 N-pole portions 30 and the 4 S-pole portions 31 are alternately arranged along the circumferential direction; the structure of the fixed member 4 is the same as that of the rotating member 3, and also includes 4 N-pole portions 40 and 4 S-pole portions 41, and the 4 N-pole portions 40 and the 4 S-pole portions 41 are alternately arranged along the circumferential direction. Of course, the magnet can also include other numbers of N-pole portions and S-pole portions, such as 1, 2, 3 or more than 4; the number of N-pole portions and S-pole portions included in the fixed part 4 can be the same as or different from the number of N-pole portions and S-pole portions included in the rotating part 3.

[0069] Specifically, the rotating member 3 may include at least two magnet units, such as eight magnet units, and the end of the eight magnet units facing the fixed member 4 has N-pole portions 30 and S-pole portions 31 alternately arranged; similarly, the fixed member 4 may include at least two magnet units, such as eight magnet units, and the end of the eight magnet units facing the rotating member 3 has N-pole portions 40 and S-pole portions 41 alternately arranged.

[0070] The folding and unfolding process of the foldable frame of this embodiment is described in detail below.

[0071] In the unfolded state, the rotating member 3 and the fixed member 4 are in a state of opposite attraction. Figure 6 As shown in state (a), the magnetic attraction enables the connecting arm 1 to be stably maintained in the unfolded state.

[0072] When the connecting arm 1 in the unfolded position needs to be folded, an external force is applied to the connecting arm 1 to drive it to rotate. During the rotation process, the rotating member 3 and the fixed member 4 will experience a process from opposite poles attracting each other to like poles repelling each other, that is, from Figure 6 The state (a) changes to Figure 6 State (b) in which the direction of the circumferential component of the magnetic force between the rotating member 3 and the fixed member 4 is opposite to the direction of rotation thereof, and therefore an external force needs to be applied to overcome the circumferential component;

[0073] Continue to rotate the connecting arm 1. At this time, the circumferential component of the magnetic force between the rotating member 3 and the fixed member 4 is in the same direction as the rotating direction. The circumferential component can promote the automatic rotation of the connecting arm 1. At this time, the external force can be removed.

[0074] When the connecting arm 1 rotates automatically, the rotating part 3 and the fixed part 4 change from repulsion of the same poles to attraction of opposite poles. Figure 6In state (c), the automatic rotation of the connecting arm 1 stops, and the connecting arm 1 is in a folded position. Under the action of the magnetic attraction, the connecting arm 1 can stably maintain the folded state. At this time, the folding process of the connecting arm 1 is completed.

[0075] The process of the connecting arm 1 rotating from the folded position to the unfolded position is similar to the above process and will not be repeated.

[0076] When the connecting arm 1 rotates between the folded position and the unfolded position, the magnetic force between the rotating part 3 and the fixed part 4 can help it rotate, so as to facilitate the unfolding or folding of the rotor of the drone; and when the connecting arm 1 is in the unfolded position or the folded position, if the connecting arm 1 shakes, the component force in the circumferential direction generated by the magnetic attraction hinders the rotation of the connecting arm 1, and enables the connecting arm 1 to automatically return to the unfolded position or the folded position, so that the connecting arm 1 can be stably maintained in the unfolded state or the folded state.

[0077] Alternatively, if Figure 3 and Figure 4 As shown, a first magnetic conductive shell 5 is disposed outside the rotating member 3, the first magnetic conductive shell 5 is fixed to the rotating member 3, and the first magnetic conductive shell 5 has a first opening, and the first opening faces the fixed member 4;

[0078] A second magnetic conductive shell 6 is disposed outside the fixing member 4 . The second magnetic conductive shell 6 is fixed to the fixing member 4 . The second magnetic conductive shell 6 has a second opening, and the second opening faces the rotating member 3 .

[0079] Since the magnetic field interferes with certain electronic components of the drone, a magnetic conductive shell is made of magnetic conductive material to shield the magnetic field, thereby reducing interference and improving the performance of the electronic components. In addition, an opening is opened on the magnetic conductive shell, and the opening of the first magnetic conductive shell 5 outside the rotating part 3 is directed toward the fixed part 4, and the opening of the second magnetic conductive shell 6 outside the fixed part 4 is directed toward the rotating part 3, so as to ensure that there is a magnetic force between the rotating part 3 and the fixed part 4, so that the connecting arm 1 can rotate under the action of the magnetic force.

[0080] Alternatively, if Figure 7 As shown, two axial connecting rods 51 are provided on the end surface of the first magnetic conductive shell 5 away from the fixing member 4; two axial mounting holes 10 ( Figure 3 Only one is shown in the figure), each axial connecting rod 51 extends into an axial mounting hole 10. Through the cooperation between the two axial connecting rods 51 and the two axial mounting holes 10, the circumferential fixation of the first magnetic conductive shell 5 and the connecting arm 1 is achieved, so that the first magnetic conductive shell 5 drives the connecting arm 1 device.

[0081] Further, if Figure 3As shown, an elastic element is provided between the end surface of the first magnetic conductive shell 5 away from the fixing member 4 and the connecting arm 1. Specifically, in this embodiment, the elastic element may be an elastic pad 8. Of course, the elastic element may also be a spring or the like. The elastic element can ensure that during the rotation of the connecting arm 1, the first guide groove shell and the second magnetic conductive shell 6 are always in contact, and the two will not sway axially.

[0082] Alternatively, if Figure 3 As shown, two elastic pads 8 are provided to avoid the axial connecting rod 51. The axial connecting rod 51 can pass through between the two elastic pads 8 and then extend into the axial mounting hole 10.

[0083] Optionally, the rack further includes a base. Specifically, Figure 3 As shown, in this embodiment, the frame includes two bases 2-1 and 2-2, and the two bases 2-1 and 2-2 are both configured to be fixedly connected to the fuselage.

[0084] The connecting arm 1 is rotatably connected to the bases 2-1 and 2-2 via a rotating shaft 7. Specifically, both ends of the rotating shaft 7 are connected to the bases 2-1 and 2-2 respectively. The fixing member 4 and the second magnetic conductive shell 6 are both mounted on the base 2-2.

[0085] When the frame includes bases 2-1 and 2-2, the connecting arm 1 can be rotatably connected to the bases 2-1 and 2-2, and the fixing member 4 and the second magnetic shell 6 can be installed on the base 2-2. Then the bases 2-1 and 2-2 are fixed to the fuselage, and the connecting arm 1 can also be rotated relative to the fuselage. In addition, the setting of the bases 2-1 and 2-2 avoids fixing the fixing member 4, the second magnetic shell 6, etc. on the fuselage. It is only necessary to fix the bases 2-1 and 2-2 to the fuselage, which reduces the modification of the fuselage, so that the frame can be used on various drones, thereby improving the applicability of the foldable frame.

[0086] Specifically, both ends of the rotating shaft 7 are fixed to the bases 2-1 and 2-2, and the connecting arm 1 is rotatably connected to the rotating shaft 7. In this case, under the action of the magnetic force, the connecting arm 1 can rotate around the rotating shaft 7 to open or retract the rotor.

[0087] Of course, the connecting arm 1 can also be fixed to the rotating shaft 7, and the two ends of the rotating shaft 7 are rotatably connected to the bases 2-1 and 2-2. In this case, under the action of the magnetic force, the connecting arm 1 and the rotating shaft 7 rotate together relative to the base 2-1.

[0088] Embodiment 2:

[0089] like Figure 8-Figure 10 As shown, this embodiment provides a foldable frame, which is different from the frame described in the first embodiment in that the manner in which the magnetic force between the rotating member 3 and the fixed member 4 can generate a component force along the circumferential direction is different.

[0090] In this embodiment, a connecting member is fixed on the fixing member 4, a protrusion 60 is provided on the connecting arm 1 and one of the connecting members, and a groove 50 matching with the protrusion 60 is provided on the other, and the side walls on both sides of the groove 50 are inclined outward, and the inclined side walls can decompose the axial magnetic force into a component force including a circumferential direction.

[0091] Specifically, the setting of the inclined side wall allows the magnetic force along the axial direction between the relatively arranged rotating part 3 and the fixed part 4 to be decomposed into a component force in the direction perpendicular to the side wall and a component force along the side wall. The component force along the side wall can be decomposed into a component force along the circumferential direction. The component force along the circumferential direction can promote the rotation of the connecting arm 1 during the rotation of the connecting arm 1 to help the unfolding and folding of the connecting arm 1. At the same time, when the connecting arm 1 is in the unfolded position or the folded position, the component force in the circumferential direction can also prevent the rotation of the connecting arm 1, so that the connecting arm can automatically return to the unfolded position or the folded position when shaking.

[0092] In the unfolded position or the folded position, the protrusion 60 is located in the groove 50, so that the connecting arm 1 can be stably maintained in the unfolded or folded state.

[0093] Optionally, the groove 50 is arranged on the end surface of the first magnetic shell 5 adjacent to the fixing member 4, the connecting member is a second magnetic shell 6 arranged outside the fixing member 4, and the protrusion 60 is arranged on the end surface of the second magnetic shell 6 adjacent to the rotating member 3.

[0094] The protrusion 60 and the groove 50 are respectively arranged on the first magnetic conductive shell 5 and the second magnetic conductive shell 6, which is convenient for processing; the connecting piece is used to both arrange the protrusion 60 and has the function of shielding the magnetic field, which can reduce the number of components and simplify the structure.

[0095] Alternatively, if Fig. 9 As shown, there are at least two grooves 50 , which are evenly arranged along the circumference of the first magnetic conductive shell 5 ; that is, the intervals between the grooves 50 on the circumference are the same angle.

[0096] like Fig.10 As shown, there are at least two protrusions 60 , which are evenly arranged along the circumference of the second magnetic conductive shell 6 , that is, the protrusions 60 are spaced at the same angle on the circumference.

[0097] In some other embodiments, at least two grooves 50 are provided and are non-uniformly arranged along the circumference of the first magnetic conductive shell 5 , and correspondingly, at least two protrusions 60 are also provided and are non-uniformly arranged along the circumference of the second magnetic conductive shell 6 .

[0098] During the rotation of the connecting arm 1, there are two states: the protrusion 60 is located in the groove 50, and the protrusion 60 is against the end surface of the second magnetic shell 6. Between the two states, axial relative displacement occurs between the first magnetic shell 5 and the second magnetic shell 6. Therefore, through the axial connecting rod 51 set on the first magnetic shell 5 and the axial mounting hole 10 set on the connecting arm 1, the first magnetic shell 5 can be axially moved relative to the connecting arm 1 to facilitate the rotation of the connecting arm 1.

[0099] The elastic element arranged between the first magnetic conductive shell 5 and the connecting arm 1 can be deformed when axial relative displacement occurs between the first magnetic conductive shell 5 and the second magnetic conductive shell 6, so as to ensure that during the rotation of the connecting arm 1, the first guide groove shell and the second magnetic conductive shell 6 are always in contact and no axial shaking occurs between the two.

[0100] Of course, the second magnetic conductive shell and the base can also be connected axially and movably, and an elastic element is provided between the second magnetic conductive shell and the base. This structure is also conducive to the rotation of the connecting arm and avoids axial shaking of the first guide groove shell or the second magnetic conductive shell.

[0101] The folding and unfolding process of the foldable frame of this embodiment will be described in detail below with reference to the accompanying drawings.

[0102] (1) If the rotating member 3 and the fixed member 4 are in a state of repulsion with the same poles:

[0103] In the unfolded position, the protrusion 60 is located in the groove 50, so that the connecting arm 1 can be stably maintained in the unfolded state.

[0104] When the connecting arm 1 in the unfolded position needs to be folded, an external force is applied to the connecting arm 1 to drive it to rotate, such as Fig. 9 When the projection 60 is rotated in the right direction, when the protrusion 60 contacts the side wall on the right side of the groove 50, the magnetic repulsion F in the axial direction on the first magnetic conductive shell 5 can be decomposed into a force component F1 in the direction perpendicular to the side wall and a force component F2 in the direction of the side wall. The force component F2 in the direction of the side wall can be decomposed into a force component in the circumferential direction. The direction of the force component in the circumferential direction is opposite to the rotation direction of the connecting arm 1, so an external force needs to be applied to overcome the circumferential force component.

[0105] The external force is continuously applied to rotate the connecting arm 1, and the protrusion 60 abuts against the end surface of the second magnetic conductive shell 6. At this time, the magnetic repulsive force F along the axial direction between the rotating member 3 and the fixed member 4 does not generate a component force along the circumferential direction.

[0106] Continue to rotate the connecting arm 1. When the protrusion 60 contacts the side wall of the left side of the groove 50 on the right side, the magnetic repulsive force F in the axial direction on the first magnetic conductive shell 5 can be decomposed into a force component F1' in the direction perpendicular to the side wall and a force component F2' in the direction of the side wall. The force component F2' in the direction of the side wall can be decomposed into a force component in the circumferential direction. The direction of the force component in the circumferential direction is the same as the rotation direction of the connecting arm 1. The circumferential force component can promote the automatic rotation of the connecting arm 1. At this time, the external force can be cancelled.

[0107] When the connecting arm 1 automatically rotates until the protrusion 60 completely falls into the groove 50 on the right side, the magnetic repulsion F along the axial direction between the rotating member 3 and the fixing member 4 does not generate a component force along the circumferential direction, and the automatic rotation of the connecting arm 1 stops. At this time, the connecting arm 1 is in a folded position;

[0108] With the cooperation between the protrusion 60 and the groove 50 , the connecting arm 1 can be stably maintained in the folded state, and the folding process of the connecting arm 1 is now completed.

[0109] The process of the connecting arm 1 rotating from the folded position to the unfolded position is similar to the above process and will not be repeated.

[0110] (2) If the rotating member 3 and the fixed member 4 are in a state of opposite attraction:

[0111] In the unfolded position, the protrusion 60 is located in the groove 50, so that the connecting arm 1 can be stably maintained in the unfolded state.

[0112] When the connecting arm 1 in the unfolded position needs to be folded, an external force is applied to the connecting arm 1 to drive it to rotate. At this time, the protrusion 60 and the groove 50 are gradually separated, that is, the rotating member 3 and the fixed member 4 are gradually axially separated. At this time, the magnetic attraction between the rotating member 3 and the fixed member 4 hinders the moving away, so the magnetic attraction will generate a circumferential component force that hinders the rotation of the connecting arm 1. At this time, an external force needs to be applied to rotate the connecting arm 1;

[0113] The external force is continuously applied to rotate the connecting arm 1, and the protrusion 60 abuts against the end surface of the second magnetic conductive shell 6. At this time, the axial distance between the rotating member 3 and the fixed member 4 remains unchanged, and the magnetic attraction force F between the rotating member 3 and the fixed member 4 in the axial direction does not generate a component force in the circumferential direction.

[0114] The connecting arm 1 continues to rotate. When the protrusion 60 begins to enter another groove 50, the rotating member 3 and the fixing member 4 gradually approach each other axially. At this time, the magnetic attraction between the rotating member 3 and the fixing member 4 causes them to move axially closer. Therefore, the magnetic attraction will generate a circumferential component force that promotes the rotation of the connecting arm 1. At this time, no external force is required to rotate the connecting arm 1. The first magnetic conductive shell 5 drives the connecting arm 1 to rotate under the action of the magnetic attraction.

[0115] When the connecting arm 1 automatically rotates until the protrusion 60 completely falls into the other groove 50, the magnetic attraction between the rotating member 3 and the fixing member 4 in the axial direction prevents the connecting arm 1 from automatically rotating, and the connecting arm 1 is in a folded position at this time;

[0116] Under the cooperation between the protrusion 60 and the groove 50 and the effect of the magnetic attraction, the connecting arm 1 can be stably maintained in the folded state, and the folding process of the connecting arm 1 is completed.

[0117] The process of the connecting arm 1 rotating from the folded position to the unfolded position is similar to the above process and will not be repeated.

[0118] When the connecting arm 1 rotates between the folded position and the unfolded position, the circumferential component of the magnetic force between the rotating part 3 and the fixed part 4 can help it rotate, so as to facilitate the unfolding or folding of the rotor of the drone; and when the connecting arm 1 is in the unfolded position or the folded position, if the connecting arm 1 shakes, the circumferential component of the magnetic force can hinder the rotation of the connecting arm 1 and enable the connecting arm 1 to automatically return to the unfolded position or the folded position, so that the connecting arm 1 can be stably maintained in the unfolded state or the folded state.

[0119] Embodiment three:

[0120] This embodiment provides a drone (not shown), including a rotor and a foldable frame. The frame can be the frame described in the first embodiment or the frame described in the second embodiment.

[0121] One end of the connecting arm of the frame is rotatably connected to the fuselage, and the other end is connected to the rotor.

[0122] The rotor of the drone of this embodiment is connected to the fuselage through a foldable frame, so that the rotor can be rotated to unfold or fold. In this way, when the drone is in use, the rotor can be unfolded to facilitate the flight of the drone and aerial photography; when the drone is transported, the rotor can be folded to reduce the size of the drone, facilitate transportation, and prevent the rotor from colliding or being damaged during transportation.

[0123] Embodiment 4:

[0124] This embodiment provides a drone (not shown), including a gimbal and a foldable frame. The frame may be the frame described in the first embodiment or the frame described in the second embodiment.

[0125] One end of the connecting arm of the frame is rotatably connected to the fuselage, and the other end is connected to the pan / tilt head.

[0126] The gimbal is connected to the fuselage through a foldable frame, so that the gimbal can be rotated to expand or fold. In this way, when using the drone for aerial photography, the frame can be rotated to expand so that the camera device fixed on the gimbal is lower than the landing gear, so as to effectively avoid interference from the landing gear and achieve interference-free panoramic shooting of the camera device.

[0127] It should be noted that the foldable frame in the above-mentioned embodiment of the present invention can be used not only for drones, but also for other products besides drones, such as handheld gimbals, etc., which are not listed here one by one.

[0128] Although the embodiments disclosed in the present invention are as above, the contents described are only embodiments adopted to facilitate understanding of the present invention and are not intended to limit the present invention. Any technician in the field to which the present invention belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in the present invention, but the patent protection scope of the present invention shall still be defined by the attached claims.

Claims

1. A foldable frame, characterized in that: The frame comprises: body; a connecting arm connected to the fuselage and rotatable relative to the fuselage between an unfolded position and a folded position; and a rotating member and a fixed member, wherein the rotating member is configured to be mounted on the connecting arm, and the fixed member is configured to be mounted on the fuselage; Wherein, the rotating member and the fixed member are both magnets, and the adjacent ends of the rotating member and the fixed member each include at least one N-pole portion and at least one S-pole portion, and when the number of the N-pole portions or the S-pole portions is greater than one, the N-pole portions and the S-pole portions are arranged alternately, and when the connecting arm rotates, under the interaction of the rotating member and the fixed member, the connecting arm can automatically rotate to the unfolded position or the folded position and maintain this position.

2. The foldable frame according to claim 1, characterized in that: The rotating member and the fixed member are disposed adjacent to each other, and in the unfolded position or the folded position, the magnetic force between the rotating member and the fixed member is in the axial direction, and maintains the connecting arm in the unfolded position or the folded position; During the rotation of the connecting arm, the magnetic force between the rotating member and the fixed member can generate a magnetic restoring force along the circumferential direction, and the magnetic restoring force can cause the connecting arm to return to the unfolded position or the folded position.

3. The foldable frame according to claim 2, characterized in that: A first magnetic conductive shell is disposed outside the rotating member, the first magnetic conductive shell has a first opening, and the first opening faces the fixed member; A second magnetic conductive shell is disposed outside the fixing member. The second magnetic conductive shell has a second opening, and the second opening faces the rotating member.

4. The foldable frame according to claim 1, characterized in that: A connecting piece is fixed on the fixing piece, a protrusion is provided on one of the connecting arm and the connecting piece, and a groove matching with the protrusion is provided on the other, and the side walls on both sides of the groove are inclined outward, and the inclined side walls can decompose the axial magnetic force into a component force including a circumferential direction.

5. The foldable frame according to claim 4, characterized in that: A first magnetic conductive shell is disposed outside the rotating member, the first magnetic conductive shell has a first opening, and the first opening faces the fixed member; The connecting member is a second magnetic conductive shell disposed outside the fixing member, the second magnetic conductive shell has a second opening, and the second opening faces the rotating member; The groove is provided on the end surface of the first magnetic conductive shell adjacent to the fixed member, and the protrusion is provided on the end surface of the second magnetic conductive shell adjacent to the rotating member.

6. The foldable frame according to claim 5, characterized in that: There are at least two grooves, which are evenly arranged along the circumference of the first magnetic conductive shell; At least two protrusions are provided and are evenly arranged along the circumference of the second magnetic conductive shell.

7. The foldable frame according to claim 5, characterized in that: An axial connecting rod is provided on one of the first magnetic conductive shell and the connecting arm, and an axial mounting hole is provided on the other, the axial connecting rod extends into the axial mounting hole and can move in the axial mounting hole, and an elastic element is provided between the end surface of the first magnetic conductive shell away from the fixing member and the connecting arm; Alternatively, the second magnetically conductive shell is connected to the body and can move axially relative to the body, and an elastic element is provided between the end surface of the second magnetically conductive shell away from the rotating member and the body.

8. The foldable frame according to any one of claims 1 to 7, characterized in that: The frame also includes a base, which is configured to be fixed to the body, the connecting arm is rotatably connected to the base, and the fixing member is installed on the base.

9. A drone, characterized in that: It comprises a rotor and a foldable frame as claimed in any one of claims 1 to 8, wherein one end of a connecting arm of the frame is rotatably connected to the fuselage, and the other end is connected to the rotor.

10. A drone, characterized in that: It comprises a pan head and a foldable frame as claimed in any one of claims 1 to 8, wherein one end of a connecting arm of the frame is rotatably connected to the fuselage, and the other end is connected to the pan head.

Images