CN111301703A - A charging platform for unmanned aerial vehicles - Google Patents

Abstract

The embodiment of the present application discloses a charging platform for an unmanned aerial vehicle, which includes a casing with a first end face, and the first end face is recessed to form an accommodating groove; the accommodating groove has a bearing surface, and the bearing surface is recessed to form a mounting hole; an electrical interface, installed in the installation hole; a second electrical interface, the first end is located in the installation hole, the second end is located in the accommodating groove; and the elastic expansion piece is located between the first electrical interface and the second electrical interface At the same time, the elastic retractable member is configured so that when the drone is placed on the second electrical interface, the elastic retractable member contracts to make the second electrical interface move in the first direction, so as to be electrically connected with the first electrical interface; When leaving the second electrical interface, the elastic elastic member extends to make the second electrical interface move in the opposite direction of the first direction, thereby disconnecting the electrical connection with the first electrical interface. The embodiment of the present application can ensure the smooth progress of the charging process, and can avoid the occurrence of electric leakage caused by the constant contact between the second electrical interface and the first electrical interface.

Description

A charging platform for unmanned aerial vehicles

technical field

The present application relates to the technical field of unmanned aerial vehicles, and in particular, to a charging platform for unmanned aerial vehicles.

Background technique

Due to the limitations of battery technology, drones have limited battery life. Therefore, when the UAV performs a task for a long time, a charging operation is also required in the middle. However, the working environment of drones is generally in remote outdoor areas. If the drones return to the ground for charging, it will take a lot of time and affect work efficiency. For this reason, in the related art, a charging platform is set on the iron tower so that the drone can be charged nearby. However, if the charging platform is placed on the iron tower, the drone is easy to shake in windy and snowy weather, and it is easy to disconnect the electricity from the charging platform. sexual connection.

SUMMARY OF THE INVENTION

The embodiment of the present application provides a charging platform for an unmanned aerial vehicle, which can solve the problem that the existing charging platform is placed on an iron tower, the drone is easy to shake in wind and snow weather, and it is easy to disconnect the electrical connection with the charging platform . The technical solution is as follows;

The embodiment of the present application provides a charging platform for an unmanned aerial vehicle, including:

The housing has a first end surface, the first end surface is recessed to form an accommodating groove; the accommodating groove has a bearing surface parallel to the first end surface, and the bearing surface is recessed to form an installation hole;

The first electrical interface is installed in the installation hole and is located at one end of the installation hole away from the bearing surface, and the first electrical interface is used for electrical connection with the power supply;

the second electrical interface, the first end is located in the mounting hole, and the second end is located in the accommodating groove; and

The elastic elastic member is located between the first electrical interface and the second electrical interface. The elastic elastic member is configured so that when the drone is placed on the second end of the second electrical interface, the elastic elastic member shrinks to make the second electrical interface The interface moves along the first direction, so as to be electrically connected with the first electrical interface; when the drone leaves the second electrical interface, the elastic elastic member extends to make the second electrical interface move in the opposite direction of the first direction, Thus, the electrical connection with the first electrical interface is disconnected.

Further, the first outer peripheral surface of the second end of the second electrical interface extends outward to form an end cap.

The beneficial effect of the above-mentioned further solution is: by extending the first outer peripheral surface of the second end of the second electrical interface to form an end cap, the area of the end cap is larger than that of the end surface of the second electrical interface, when the drone is parked in the container. When placed in the slot, the contact area between the drone and the second electrical interface is increased, and the drone and the second electrical interface can be stably connected.

Further, the elastic expansion components include:

The elastic piece is located in the accommodating groove, and the first end of the elastic piece is connected to the hole wall of the installation hole, and the second end shrinks inward and abuts against the end cover.

The beneficial effects of the above-mentioned further solutions are: by arranging the elastic telescopic element to include the elastic sheet, the elastic sheet has a simple structure and low price, is convenient to install and can reduce the input cost.

Further, the number of the elastic pieces is multiple, and the multiple elastic pieces are evenly distributed with the hole axis of the installation hole as the center.

The beneficial effect of the above-mentioned further scheme is: by arranging a plurality of elastic pieces centered on the hole axis of the installation hole, the force of the elastic expansion and contraction member received by the second electrical interface can be evenly distributed, so that the second electrical interface is relatively relative to the second electrical interface. The movement process of an electrical interface is more stable.

Further, the elastic expansion components include:

The spring is sleeved on the second electrical interface, the first end of the spring abuts on the first electrical interface, and the second end abuts on the end cover.

The beneficial effect of the above-mentioned further solution is: by arranging a spring on the second electrical interface, it can further ensure that the second electrical interface can move in the opposite direction of the first direction after the drone leaves, so as to ensure that the charging platform can work smoothly .

Further, the orthographic projection of the end cap on the bearing surface covers the port of the installation hole which is connected to the bearing surface.

The beneficial effect of the above-mentioned further scheme is: by setting the orthographic projection of the end cover on the bearing surface to cover the port connected to the bearing surface of the installation hole, it can reduce or even avoid the entry of external dust, impurities, etc. into the installation hole, ensuring the second The electrical interface and the first electrical interface can be reliably electrically connected.

Further, the bearing surface has drainage holes, and the drainage holes are through holes.

The beneficial effect of the above-mentioned further solution is that by arranging drainage holes on the bearing surface, water accumulation in the accommodating groove can be avoided.

Further, the number of accommodating slots is two, and each accommodating slot is used for accommodating brackets on the same side of the drone.

The beneficial effect of the above-mentioned further solution is: by setting two accommodating grooves, so that each accommodating groove is used for accommodating the bracket on the same side of the drone, compared with only one accommodating groove, no The connection between human and machine on the charging platform is more stable.

Further, it also includes:

Two magnetic positioning pieces, each of which is correspondingly installed in an accommodating slot; each magnetic locating piece includes a first magnet and a second magnet, and the first magnet and the second magnet are respectively arranged in an accommodating slot On two opposite side walls of the first magnet, the polarity of the first magnet is opposite to that of the second magnet.

The beneficial effect of the above-mentioned further scheme is: by setting the first magnet and the second magnet with opposite polarities, and the first magnet and the second magnet are arranged on the two opposite side walls of the accommodating slot, the bracket can be installed on the bracket. The landing direction of the drone with the opposite polarity magnet is judged, so that the drone can only land in the accommodating slot when the charging electrode on the drone bracket corresponds to the charging electrode of the charging platform, so as to ensure the smooth progress of charging.

Further, a third magnet is arranged on the bearing surface.

The beneficial effect of the above-mentioned further scheme is that: by arranging the third magnet on the bearing surface, the surface of the bracket facing the bearing surface can be provided with a drone with a second magnetic sheet, so that the drone can be parked in the accommodating surface. When in the slot, the fourth magnet installed on the drone bracket with the opposite polarity to the third magnet can generate a magnetic attraction force with the third magnet, ensuring that the drone can also be charged stably in windy and snowy weather.

The beneficial effect of the embodiment of the present application is that: by setting the accommodating groove on the first end face of the charging platform, the UAV can be located in the accommodating groove during the charging process, compared with directly parking the UAV on the plane In terms of the above, it can reduce the shaking of the drone on the charging platform in windy and snowy weather, ensure the reliable electrical connection between the drone and the charging platform, and ensure the smooth progress of the charging process. By setting the elastic stretcher, the second electrical interface of the charging platform will move down under the gravity of the drone to be electrically connected to the first electrical interface only when the charging platform is charging, and the second electrical interface will be electrically connected to the first electrical interface when it is idle. The disconnection of the first electrical interface can avoid the occurrence of electric leakage caused by the constant contact between the second electrical interface and the first electrical interface.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

1 is a perspective view of a charging platform for an unmanned aerial vehicle provided by an embodiment of the present application;

2 is a top view of a charging platform for an unmanned aerial vehicle provided by an embodiment of the present application;

Fig. 3 is the sectional view of A-A direction in Fig. 2;

Fig. 4 is the enlarged schematic diagram of the structure at B in Fig. 3;

FIG. 5 is a perspective view of another charging platform for an unmanned aerial vehicle provided by an embodiment of the present application.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present application clearer, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the illustrative examples below are not intended to represent all implementations consistent with this application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application, as recited in the appended claims.

In the first aspect, referring to FIG. 1 , FIG. 3 and FIG. 4 , an embodiment of the present application provides a charging platform 100 for a drone, including a housing 110 , a first electrical interface 120 , a second electrical interface 130 and an elastic Telescopic piece 140 .

The shape of the housing 110 may be arbitrary. Of course, in order to facilitate the processing and molding of the casing 110, the casing 110 may have a regular geometric shape, for example, the casing 110 may be in the shape of a cuboid or a cylinder. The casing 110 is described in detail below by taking a rectangular parallelepiped as an example. Referring to FIG. 3 , the casing 110 may have a first end face 111 and a second end face 112 disposed opposite to each other. The second end surface 112 may be an installation surface, so that the charging platform 100 can be fixed on the iron tower through the second end surface 112 . The connection between the second end surface 112 and the iron tower may be in any manner. For example, the second end surface 112 and the iron tower may be fastened with screws and nuts.

In order to allow the drone to be stably docked on the charging platform 100 , the drone can be docked on the first end surface 111 opposite to the second end surface 112 . In order to make the UAV park more smoothly on the first end face 111 and not easily shake in windy and snowy weather, referring to FIGS. 1 to 3 , the first end face 111 can be recessed to form an accommodating groove 1111, so that the UAV can be charged when the UAV is being charged. It can be located in the accommodating slot 1111 to ensure the smooth progress of the charging process.

Referring to FIG. 3 , the accommodating groove 1111 has a bearing surface 1112 facing away from the second end surface 112 and a second outer peripheral surface 1113 arranged around the bearing surface 1112 . It may be parallel to the first end surface 111 . The bearing surface 1112 may be recessed to form mounting holes 1114 , so that both the first electrical interface 120 and the second electrical interface 130 can be mounted in the mounting holes 1114 . The first electrical interface 120 may be located at one end of the mounting hole 1114 away from the bearing surface 1112 and is electrically connected to a power source. The first end of the second electrical interface 130 may be located in the mounting hole 1114 , and the second end may extend out of the mounting hole 1114 and be located in the accommodating slot 1111 , so as to be electrically connected to the drone located in the accommodating slot 1111 .

The second outer peripheral surface 1113 may be surrounded by four side surfaces 11131 . In order to ensure that the drone can smoothly enter the accommodating groove 1111 , at least one side surface 11131 may be formed by expanding outward from the boundary line of the bearing surface 1112 . bevel. By setting at least one side surface 11131 of the second outer peripheral surface 1113 of the accommodating groove 1111 as an inclined surface, the positioning accuracy requirements of the drone during landing can be reduced, so that as long as the support of the drone enters the inclined surface, it can be placed on the inclined surface. Under the guiding action of the inclined surface, it enters the accommodating groove 1111 . Preferably, among the four side surfaces 11131 , two opposite side surfaces 11131 may be inclined surfaces formed by expanding outward from the boundary line of the bearing surface 1112 .

The included angle between the inclined surface and the bearing surface 1112 may be 120° to 160°, and specifically, the included angle between the inclined surface and the bearing surface 1112 may be 150°. In order to enable the drone to enter the accommodating groove 1111 smoothly, a rounded corner may also be provided between the inclined surface and the bearing surface 1112 .

In order to allow the drone to be stably parked in the accommodating groove 1111 , the depth dimension of the accommodating groove 1111 perpendicular to the bearing surface 1112 may be two-thirds to twice the height of the drone. Preferably, the depth dimension of the accommodating groove 1111 perpendicular to the bearing surface 1112 may be equal to the height dimension of the drone.

Referring to FIG. 4 , the elastic elastic member 140 is located between the first electrical interface 120 and the second electrical interface 130 , and the elastic elastic member 140 is configured to elastically expand and contract when the drone is placed on the second end of the second electrical interface 130 . The member 140 is contracted to move the second electrical interface 130 along the first direction m so as to be electrically connected with the first electrical interface 120 . When the drone leaves the second electrical interface 130 , the elastic elastic member 140 extends to make the second electrical interface 130 move in the opposite direction of the first direction m, thereby disconnecting the electrical connection with the first electrical interface 120 . By arranging the elastic stretcher 140 , the charging platform 100 is electrically connected to the first electrical interface 130 only when charging, and the second electrical interface 130 is electrically connected to the first electrical interface when idle. 120 is disconnected, so as to avoid the occurrence of electric leakage caused by the constant contact between the second electrical interface 130 and the first electrical interface 120 .

It should be noted that the realization of the contraction of the elastic elastic member 140 to electrically connect the second electrical interface 130 and the first electrical interface 120 only requires that the weight of the drone meets the preset weight. For example, when the weight that needs to be carried on the elastic stretcher 140 is N1 to N2, it will shrink to the point where the electrical connection between the second electrical interface 130 and the first electrical interface 120 can be achieved, and the weight of the drone should be between N1 and N2. The value range of N1 to N2 should also be such that the elastic elastic member 140 will not be damaged, so as to ensure that the elastic elastic member 140 can be restored when the drone leaves, so as to disconnect the second electrical interface 130 from the first electrical interface 120 electrical connection.

In order for the drone to be electrically connected to the second electrical interface 130 more conveniently, the contact area between the drone and the second electrical interface 130 can be increased. The first outer peripheral surface 131 may extend outward to form the end cap 132 . Because the area of the end cap 132 is larger than the end surface area of the second electrical interface 130, when the drone is parked in the accommodating slot 1111, the contact area between the drone and the second electrical interface 130 is increased, which is convenient for no The electrical connection between the man-machine and the second electrical interface 130 . The shape of the end cap 132 may be arbitrary. Of course, in order to facilitate the processing and forming of the end cap 132, the shape of the end cap 132 may be a regular geometric shape. For example, the shape of the end cap 132 may be a rectangular parallelepiped or a cylinder. When the shape of the end cap 132 is a cylinder, the surface diameter of the end cap 132 may be 10 mm to 30 mm. Specifically, the surface diameter of the end cap 132 may be 15 mm.

The elastically stretchable member 140 may be any device with elastically stretchable properties. Of course, in order to make the structure of the charging platform 100 simple and easy to install, referring to FIG. 4 , the elastic stretchable member 140 may include elastic pieces 141 . The elastic piece 141 is located in the accommodating groove 1111 , and the first end of the elastic piece 141 is connected to the hole wall of the mounting hole 1114 , and the second end is retracted inward and abuts against the end cover 132 . The number of the elastic pieces 141 can be arbitrary. For example, the number of the elastic pieces 141 can be one, two, three, and so on. When the number of the elastic pieces 141 is one, the third outer peripheral surface of the elastic pieces 141 may be a tapered surface. When the number of the elastic pieces 141 is multiple, in order to make the force of each elastic piece 141 received by the second electrical interface 130 evenly distributed, the multiple elastic pieces 141 can be evenly distributed around the hole axis of the mounting hole 1114, so that the second electrical interface 130 can be evenly distributed. The movement process of the sexual interface 130 relative to the first electrical interface 120 is more stable.

To further ensure that the second electrical interface 130 can move in the opposite direction of the first direction m after the drone leaves, and ensure that the charging platform 100 can work smoothly, referring to FIG. The spring 142 is sleeved on the second electrical interface 130 , the first end of the spring 142 is abutted against the first electrical interface 120 , and the second end is abutted against the end cover 132 . When the elastic elastic member 140 includes the elastic piece 141 , the second end of the spring 142 can abut on the elastic piece 141 .

In order to reduce or even prevent external dust, impurities, etc. from entering the mounting hole 1114 and ensure that the second electrical interface 130 and the first electrical interface 120 can be electrically connected reliably, the orthographic projection of the end cap 132 on the bearing surface 1112 can cover The port of the mounting hole 1114 that is connected to the bearing surface 1112 . To further prevent external dust, impurities, etc. from entering the mounting holes 1114, referring to FIG.

Referring to FIG. 1 , FIG. 3 and FIG. 5 , in order to avoid water accumulation in the accommodating groove 1111 , the bearing surface 1112 has a drainage hole 1115 formed by a depression. The drain hole 1115 is a through hole, so that the accumulated water can flow out of the charging platform 100 . The diameter of the drain hole 1115 may be 8mm to 15mm. Specifically, the diameter of the drainage hole 1115 may be 10 mm. The number of drainage holes 1115 may be arbitrary. Specifically, the number of the drainage holes 1115 may be 1, 3, 5, and the like. In order to prevent the accumulation of water in the accommodating groove 1111 from entering the installation hole 1114, referring to FIG. 4, the number of the elastic pieces 141 is preferably one, and the end port of the elastic piece 141 away from the installation hole 1114 can extend in the direction away from the installation hole 1114 to A flange 1411 is formed. The stroke of the elastic piece 141 along the first direction m is the first stroke, and the first stroke may be 0.5 cm to 1.5 cm. Specifically, the first stroke may be 1 cm. In order to prevent the accumulated water in the accommodating groove 1111 from entering the mounting hole 1114, the distance from the end face of the flange 1411 away from the mounting hole 1114 to the bearing surface 1112 should be larger than the first stroke as much as possible. Specifically, the distance from the end surface of the flange 1411 away from the mounting hole 1114 to the bearing surface 1112 may be greater than the first stroke by 2 cm to 5 cm.

Since the charging electrode on the drone is made of metal material, in order to prevent the short circuit phenomenon of the drone during the charging process, the bearing surface 1112 can be coated with an insulating material.

The number of the accommodating grooves 1111 may be one or two. Preferably, referring to FIG. 5 , the number of accommodating slots 1111 is two, and each accommodating slot 1111 is used for accommodating the brackets on the same side of the drone. Compared with only one accommodating slot 1111 , the The connection of the drone on the charging platform 100 is more stable.

When two opposite side surfaces 11131 of the four side surfaces 11131 of the second outer peripheral surface 1113 are inclined surfaces, the other two side surfaces 11131 may both be vertical surfaces perpendicular to the bearing surface 1112 . In order to enable the drone to land smoothly into the accommodating slot 1111, the distance between the two vertical planes should be larger than the width dimension of the support of the drone. Of course, in order to enable the accommodating groove 1111 to guide the landing of the drone, the distance between the two vertical surfaces may be slightly larger than the width dimension of the support of the drone. Specifically, the distance between the two vertical planes may be 2 mm to 5 mm larger than the width dimension of the support of the drone. For example, the distance between the two vertical planes may be 3mm, 4mm, etc. larger than the width dimension of the support of the drone.

In order to enable the drone to land in the accommodating slot 1111, the length dimension of the accommodating slot 1111 should be slightly larger than the length dimension of the support of the drone. Specifically, the length dimension of the accommodating groove 1111 may be 2 mm to 6 mm larger than the length dimension of the support of the drone. For example, the length dimension of the accommodating groove 1111 may be 3mm, 4mm, 5mm, etc. larger than the length dimension of the support of the drone.

The drone is equipped with GPS, BD and other positioning devices, but the positioning accuracy of these positioning devices cannot reach the centimeter level and cannot meet the requirements of precise landing. However, when the drone is charging, the charging electrode of the drone must be connected to the charging electrode. The charging electrodes on the platform correspond to each other. If the charging electrodes are opposite, the UAV battery and the battery on the charging platform will be damaged. For this reason, referring to FIG. 5 , the charging platform 100 may further include two magnetic positioning members 150 . Each magnetic positioning member 150 is correspondingly installed in one of the accommodating grooves 1111 . The magnetic positioning member 150 may include a first magnet and a second magnet, the first magnet and the second magnet are respectively disposed on two opposite side walls of the accommodating slot 1111, and the polarity of the first magnet is the same as that of the second magnet. Sex is the opposite. By arranging the first magnet and the second magnet with opposite polarities, and the first magnet and the second magnet are arranged on the two opposite side walls of the accommodating slot 1111, it is possible to prevent the installation of the magnets with opposite polarities on the bracket. The landing direction of the man-machine is judged so that the charging electrode on the drone support corresponds to the charging electrode of the charging platform 100 before the drone can be dropped into the accommodating slot 1111 to ensure smooth charging. Specifically, the polarity of the first magnet can be N-pole, the polarity of the second magnet can be S-pole, and the N-pole magnet and S-pole magnet can also be installed on the bracket of the drone. The principle of attraction, when the UAV falls in the opposite direction, the contact of the same level of the magnet will repel the UAV's bracket to land. When the UAV controller receives the information that it cannot land, it can control the UAV Change the landing direction to be able to land correctly.

In order to make the UAV installed on the iron tower park more smoothly in the accommodating slot 1111 in the weather of wind and snow, a third magnet 1116 can also be set on the bearing surface 1112, so that the UAV can be parked in the accommodating slot 1111. When inside the drone, the fourth magnet with the opposite polarity to the third magnet 1116 installed on the bracket of the drone can generate a magnetic attraction force with the third magnet 1116 to ensure that the drone can also be charged stably in windy and snowy weather. For example, the polarity of the third magnet may be N pole, and the polarity of the fourth magnet may be S pole.

In the description of the present application, it should be understood that the terms "first", "second" and the like are used for descriptive purposes only, and should not be construed as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood in specific situations. Also, in the description of the present application, unless otherwise specified, "a plurality" means two or more. "And/or", which describes the association relationship of the associated objects, means that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, A and B exist at the same time, and B exists alone. The character "/" generally indicates that the associated objects are an "or" relationship.

The above disclosures are only the preferred embodiments of the present application, and of course, the scope of the rights of the present application cannot be limited by this. Therefore, equivalent changes made according to the claims of the present application are still within the scope of the present application.

Claims (10)

1. a charging platform for unmanned aerial vehicle, is characterized in that, comprises: the housing has a first end surface, the first end surface is recessed to form an accommodating groove; the accommodating groove has a bearing surface parallel to the first end surface, and the bearing surface is recessed to form a mounting hole; a first electrical interface, installed in the mounting hole and located at one end of the mounting hole away from the bearing surface, the first electrical interface is used for electrical connection with a power source; a second electrical interface, the first end is located in the mounting hole, and the second end is located in the accommodating slot; and The elastic expansion piece is located between the first electrical interface and the second electrical interface, and the elastic expansion piece is configured so that when the drone is placed on the second end of the second electrical interface, The elastic retractable member contracts to make the second electrical interface move along the first direction, so as to be electrically connected with the first electrical interface; when the drone leaves the second electrical interface, the The elastic elastic member is elongated to move the second electrical interface in a direction opposite to the first direction, thereby disconnecting the electrical connection with the first electrical interface. 2 . The charging platform of claim 1 , wherein the first outer peripheral surface of the second end of the second electrical interface extends outward to form an end cap. 3 . 3. The charging platform for an unmanned aerial vehicle according to claim 2, wherein the elastic expansion part comprises: The elastic sheet is located in the accommodating groove, and the first end of the elastic sheet is connected to the hole wall of the installation hole, and the second end is retracted inward and abuts against the end cover. 4 . The charging platform of the unmanned aerial vehicle according to claim 3 , wherein the number of the elastic pieces is multiple, and the multiple elastic pieces are evenly distributed around the hole axis of the installation hole as the center. 5 . 5. The charging platform for an unmanned aerial vehicle according to claim 2, wherein the elastic expansion part comprises: The spring is sleeved on the second electrical interface, the first end of the spring abuts on the first electrical interface, and the second end abuts on the end cover. 6 . The charging platform of the unmanned aerial vehicle according to claim 2 , wherein the orthographic projection of the end cover on the bearing surface covers the port of the installation hole that is connected to the bearing surface. 7 . 7 . The charging platform of the unmanned aerial vehicle according to claim 1 , wherein the bearing surface has a drainage hole, and the drainage hole is a through hole. 8 . 8 . The charging platform for a drone according to claim 1 , wherein the number of the accommodating slots is two, and each of the accommodating slots is used for accommodating the same side of the drone. 9 . bracket. 9. The charging device of the drone according to claim 8, further comprising: Two magnetic positioning pieces, each of which is correspondingly installed in one of the accommodating slots; each of the magnetic positioning pieces includes a first magnet and a second magnet, the first magnet and the The second magnets are respectively disposed on two opposite side walls of one of the accommodating slots, and the polarity of the first magnet is opposite to that of the second magnet. 10 . The charging device for a drone according to claim 1 , wherein a third magnet is provided on the bearing surface. 11 .

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