Medicine box and drone with quick-detachable liquid level detection device

Abstract

The present invention belongs to the technical field of unmanned aerial vehicles, and specifically relates to a medicine box and an unmanned aerial vehicle with a quick-detachable liquid level detection device, comprising a box body, a liquid level detection device being provided on the box body, the liquid level detection device comprising a magnetic sensor device, a float device and an external connection device, the float device being fixed on a side wall inside the box body, the magnetic sensor device being located on the outside of the corresponding side wall, the external connection device being fixed outside the box body and being detachably connected to the magnetic sensor device; the magnetic sensor device comprising a housing, a first circuit board and a plurality of magnetic sensors, the plurality of magnetic sensors being distributed on the first circuit board in a vertical direction; the float device comprising a guide device and a float, and a magnet being provided on the float. The above-mentioned liquid level detection device realizes continuous liquid level detection in the medicine box, the magnetic sensor device is detachably connected to the external connection device, and when the magnetic sensor is damaged, the magnetic sensor device can be directly disassembled and replaced, the operation is convenient and quick, and it is applicable to a variety of medicine boxes.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicles, and in particular to a medicine box and an unmanned aerial vehicle with a quick-detachable liquid level detection device. Background Art

[0002] Plant protection drones are widely used in agriculture and forestry, which not only saves manpower and material resources, but also prevents operators from being exposed to pesticides, which is beneficial to improving the safety of operations and the efficiency of agricultural plant protection operations. Plant protection drones need to carry medicine boxes for plant protection operations. In order to monitor the amount of liquid medicine in the medicine box to ensure timely replenishment of the liquid medicine, a liquid level detection device needs to be installed on the medicine box.

[0003] At present, patch-type liquid level gauges and float-type liquid level gauges are usually used to monitor the liquid in the medicine box, but these two methods can only detect the liquid level at a specific position and cannot achieve continuous liquid level detection. In order to overcome this defect, the Chinese patent application number is 201710628112.5, and the patent name is "Liquid level detection device, detection method and water tank invention patent provides a water tank, which is equipped with a liquid level detection device. The liquid level detection device includes a float with a magnet and a plurality of magnetic sensors of different heights. The control unit obtains the liquid level height where the float is located according to the magnetic induction parameters of the magnetic sensor and the distance between the magnetic sensor and the magnet. Since the magnetic sensor can sense the magnetic field within a certain area, and the output magnetic induction parameters will change with the change of the distance between it and the magnet, the liquid level detection device can achieve continuous detection of a large range of liquid levels. Although this detection method can achieve continuous liquid level detection within a certain range, the magnetic sensor is often damaged during use, and the detection device installed on the water tank is not easy to disassemble and replace. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a medicine box and a drone with a quick-detachable liquid level detection device. The liquid level detection device can not only realize continuous liquid level detection, but also is easy to disassemble and replace, and has a wide range of applications.

[0005] In order to achieve the above-mentioned technical effects, the present invention adopts the following technical solutions: on the one hand, an embodiment of the present invention provides a medicine box with a quick-detachable liquid level detection device, including a box body, on which a liquid level detection device is provided, the liquid level detection device includes a magnetic sensor device, a float device and an external connection device, the float device is fixed on a side wall inside the box body, the magnetic sensor device is located on the outside of the corresponding side wall, the external connection device is fixed outside the box body and is detachably connected to the magnetic sensor device; the magnetic sensor device includes a shell, a first circuit board and a plurality of magnetic sensors, the plurality of sensors are distributed on the first circuit board in a vertical direction, and the first circuit board is fixed in the shell; the float device includes a guide device and a float moving in a vertical direction on the guide device, and a magnet is provided on the float.

[0006] The medicine box provided in the embodiment of the present invention is provided with a liquid level detection device, which detects the continuous liquid level within a certain range through a float device and a magnetic sensor device. The float device is fixed in the box body, and the magnetic sensor device corresponding to the position is fixed on the outer wall of the box body. The magnetic sensor device is detachably connected to the external connection device. When the magnetic sensor device needs to be replaced, the two can be directly detached. In addition, the liquid level detection device can be produced independently of the medicine box and is suitable for various types of medicine boxes.

[0007] In a preferred embodiment of the invention, the external connection device is provided with a mounting groove, the mounting groove includes a bottom opening and a side opening, the inner walls on both sides of the mounting groove are provided with guide rails along the length direction, and the upper part of the outer shell of the magnetic sensor device is provided with slide grooves corresponding to the guide rails, and the upper part of the outer shell is fixed in the mounting groove by the guide rails and the slide grooves connected by sliding connection.

[0008] On the other hand, an embodiment of the present invention provides a drone, comprising a fuselage and the above-mentioned medicine box, wherein the medicine box is fixed on the fuselage.

[0009] The above technical scheme has the following beneficial effects: the embodiment of the present invention provides a medicine box and a drone with a quick-detachable liquid level detection device. The liquid level detection device installed on the medicine box realizes continuous liquid level detection through the joint action of a magnetic sensor device and a float device. In addition, the magnetic sensor device is detachably connected to the external connection device. When the magnetic sensor is damaged, the magnetic sensor device can be directly disassembled and replaced. In addition, the second circuit board in the external connection device and the first circuit board in the magnetic sensor device are connected by a connector with a spring pin, which ensures the electrical connection relationship of the internal circuit board while realizing the detachable connection between the external connection device and the magnetic sensor device. The liquid level detection device can be applied to various types of medicine boxes. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the structure of a medicine box provided by an embodiment of the present invention;

[0011] Figure 2 A schematic diagram of the structure of an external connection device and a magnetic sensor device provided in an embodiment of the present invention;

[0012] Figure 3 A schematic diagram of the external structure of a magnetic sensor device provided in an embodiment of the present invention;

[0013] Figure 4 A cross-sectional view of a magnetic sensor device provided by an embodiment of the present invention;

[0014] Figure 5 A schematic diagram of the structure of an external connection device provided by an embodiment of the present invention;

[0015] Figure 6 A top view of an external connection device provided by an embodiment of the present invention;

[0016] Figure 7 Provided by the embodiment of the present invention Figure 6 Sectional view at EE;

[0017] Figure 8 A cross-sectional view of an external connection device provided by an embodiment of the present invention;

[0018] Fig. 9 This is a schematic structural diagram of a float device provided in an embodiment of the present invention.

[0019] In the figure:

[0020] 1. Box body; 2. External connecting device; 2.1. Mounting groove; 2.2. Guide rail; 2.3. Connector; 2.4. Push block; 2.41. Baffle; 2.5. Support plate; 2.6. Second spring; 2.7. Accommodating space; 3. Magnetic sensor device; 3.1. Housing; 3.11. Slot; 3.12. Slide groove; 3.2. Spring ejector pin; 3.3. First circuit board; 3.4. Magnetic sensor; 4. Lock; 4.1. Barbed clamping part; 5. Second spring; 6. Rotating shaft; 7. Float device; 7.1. Connecting plate; 7.2. Guide column; 7.3. Limiting hole; 7.4. Float. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the present invention, the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction.

[0023] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0024] In addition, the terms "installed", "set", "provided with", "connected", "connected" and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Unless otherwise specified, "plurality" means two or more.

[0026] The present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0027] Embodiment 1:

[0028] The present embodiment of the invention provides a medicine box with a quick-disassembly liquid level detection device, referring to the figure, comprising a box body 1, on which a magnetic sensor device 3, a float device 7 and an external connection device 2 are arranged, wherein the float device 7 is fixed on a side wall in the box body, the magnetic sensor device is located on the outside of the corresponding side wall, the float device and the magnetic sensor device are respectively located on both sides of the same side wall of the box body, and the external connection device is fixed outside the box body and is detachably connected to the magnetic sensor device; the magnetic sensor device comprises a housing 3.1, a first circuit board 3.3 and a plurality of magnetic sensors 3.4, and the magnetic sensors are preferably linear Hall sensors, and the plurality of magnetic sensors are distributed on the first circuit board 3.3 in a vertical direction, and the first circuit board is fixed in the housing in a vertical direction; the float device comprises a guide device and a float moving in a vertical direction on the guide device, wherein a magnet is arranged on the float, and the plane where the float is located is parallel to the first circuit board. The movement direction of the float in the medicine box is along the vertical direction of the guide device.

[0029] In this embodiment, preferably, the housing of the magnetic sensor device is a rectangular body, including an inner plate and an outer plate arranged opposite to each other, the outer surface of the inner plate is attached to the box body, and the first circuit board is attached to the inner surface of the inner plate. The housing can be provided with a detachable cover to replace the first circuit board inside and the magnetic sensor thereon.

[0030] The provided liquid level detection device is provided with multiple magnetic sensors, which can sense the magnetic induction parameters of the magnetic field generated by the magnet, such as the output voltage, and the magnetic induction parameters outputted by the magnetic sensor can change with the change of the distance between the sensor and the magnet. Optionally, this embodiment uses a row of magnetic sensors and a float to detect the liquid level. According to common knowledge, the output voltage V of the magnetic sensor has a functional relationship with the distance L (the distance between the magnetic sensor and the float in the vertical direction). The control unit on the first circuit board can obtain the liquid level height where the float is located, that is, the actual liquid level height, according to the output voltages of multiple magnetic sensors with different heights, the distance L between the magnetic sensor and the float in the vertical direction, and the liquid level height H corresponding to the position of the magnetic sensor. The above-mentioned specific calculation method for detecting continuous liquid levels using multiple magnetic sensors in the same vertical direction and a float is a known technology in public technical literature, and this application will not be elaborated in detail.

[0031] Since magnetic sensors are easily damaged during use and need to be replaced frequently, and the existing liquid level detection devices are not convenient for replacing the magnetic sensors, this embodiment provides a method for easily disassembling and replacing the magnetic sensors based on the principle of continuous liquid level detection, and can install the liquid level detection device that can continuously detect the liquid level on the box body without changing the original structure of the medicine box, thereby achieving the purpose of facilitating the replacement of the magnetic sensors.

[0032] Embodiment 2:

[0033] On the basis of Example 1, preferably, the external connection device 2 is provided with a mounting groove 2.1, and the mounting groove includes a bottom opening and a side opening, and the inner walls on both sides of the mounting groove are provided with guide rails 2.2 along the length direction, and the upper sides of the outer shell 3.1 of the magnetic sensor device 3 are provided with slide grooves 3.12 corresponding to the guide rails, and the upper part of the outer shell is fixed in the mounting groove by the guide rails and the slide grooves connected by sliding connection.

[0034] Since the first circuit board of the magnetic sensor device needs to be connected to other peripheral devices through wires, for example, when the medicine box is used on a drone, the first circuit board of the magnetic sensor device needs to be connected to the flight controller to send the detected liquid level information to the flight controller. In order to avoid opening a hole in the shell to improve the sealing effect of the shell, this embodiment provides a method of connecting the first circuit board instead of wires. The specific structure is as follows:

[0035] The shell of the magnetic sensor device is provided with a through slot communicating with the interior thereof, the upper part of the shell has a certain thickness, there are multiple through slots, and the present embodiment provides four through slots, each of which is provided with a spring ejector pin, the bottom of the spring ejector pin 3.2 is fixedly connected to the first circuit board 3.3, and the top extends out of the through slot; the external connection device is provided with a second circuit board, the second circuit board is electrically connected with a connector 2.3, and the connector can be connected to the flight controller through a connecting line, the top of the installation slot is provided with a probe hole corresponding to the elastic ejector pin 3.2, the probe hole is provided with a fixed probe, one end of the fixed probe is provided with a metal sheet, and the other end is fixed to the second circuit board; after the magnetic sensor device is installed in conjunction with the external connection device, the spring ejector pin is correspondingly inserted into the corresponding probe hole and then connected to the metal sheet to conduct the circuit.

[0036] This embodiment uses spring ejector pins 3.2 to realize the electrical connection between the first circuit board and the second circuit board. When the magnetic sensor device 3 is plugged into the external connection device 2, the spring ejector pins protruding from the upper part of the housing extend into the through slot and touch the metal sheet to conduct the circuit. This electrical connection method is simple, convenient and effective, and the electrical connection relationship will not be affected when replacing or disassembling the magnetic sensor device.

[0037] Embodiment 3:

[0038] On the basis of the above embodiment, in order to prevent the upper part of the magnetic sensor device from falling out of the mounting groove 2.1, a locking device is provided in the mounting groove. The locking device is located on the other side opposite to the side opening. The locking device clamps the upper part of the magnetic sensor device after it is installed in the mounting groove.

[0039] Specifically, the locking device includes a rotating shaft 6, a lock buckle 4 and a first spring 5. One end of the lock buckle 4 extends into the installation slot, and the end is a barb-shaped clamping portion 4.1. The middle part of the lock buckle is rotatably connected to the side wall of the installation slot through the rotating shaft 6. A support plate 2.5 extends outwardly on the external connection device outside the installation slot, and a first spring is connected between the other end of the lock buckle 4 and the support plate 2.5. The housing of the magnetic sensor device is provided with a clamping groove 3.11 corresponding to the barb-shaped clamping portion. The shape of the clamping groove matches the barb-shaped clamping portion 4.1. The lock buckle is in the shape of a long strip plate, with one end of the barb-shaped clamping portion extending into the installation slot and mutually engaging with the clamping groove, and the other end extending out of the installation slot, and the middle part rotates around the rotating shaft. When the housing of the magnetic sensor device is inserted into the installation slot, the barb-shaped clamping portion automatically enters the clamping groove and clamps, which plays a limiting role on the magnetic sensor device to prevent it from being disengaged from the installation slot due to external force. When the magnetic sensor device needs to be disassembled, one end of the lock buckle extending out of the installation slot is pressed downward, and one end of the hook-shaped clamping portion in the installation slot is tilted upward and disengaged from the limiting effect on the magnetic sensor device. At this time, the magnetic sensor device can be pulled out, and the first spring has a reset effect.

[0040] The locking device can realize the rapid disassembly and assembly between the magnetic sensor device and the external connection device. The operation is convenient and quick. No additional tools are required. The magnetic sensor device can be pulled out by pressing the lock buckle on the outside of the installation slot.

[0041] Embodiment 4:

[0042] Since the upper part of the magnetic sensor device is slidably plugged into the mounting slot, in order to ensure that the upper part of the magnetic sensor slides smoothly into the mounting slot, the width of the mounting slot needs to be slightly larger than the thickness of the magnetic sensor housing. Therefore, a certain gap will appear between the inner wall of the mounting slot and the housing of the magnetic sensor device. Since the drone will vibrate during flight, thereby causing the medicine box to vibrate, the existence of this gap will cause the upper part of the magnetic sensor device to move within a small range in the mounting slot, affecting the stability of the electrical connection relationship of the spring ejector pin, thereby causing the detected data to be unstable, and further causing the measured liquid level to be inaccurate.

[0043] In order to overcome the above defects, on the basis of the above embodiments, in this embodiment, an elastic pusher is provided in one side wall of the installation slot 2.1, and the elastic pusher is installed in the installation slot at the upper part of the magnetic sensor device and then abuts against the housing of the magnetic sensor device. Specifically, a housing space is provided in one side wall of the installation slot, and the housing space is provided with an opening communicating with the inside of the installation slot, and the elastic pusher includes a pusher block 2.4 and a plurality of second springs 2.6, and the opening of the housing space is located below the guide rail, that is, the pusher block protruding from the opening is located below the guide rail. In this embodiment, three second springs are preferably used, and baffles 2.41 extend from both sides of the pusher block 2.4, and the baffles are clamped on the inner side of the opening, and the pusher block is adapted to the size of the opening, and the second spring is connected to the pusher block and the inner side wall of the housing space, and when the top of the housing of the magnetic sensor device is inserted into the installation slot, the pusher block is pushed into the installation slot and the second spring is in a compressed state. Before the top of the housing of the magnetic sensor device is inserted into the mounting slot, the second spring is in a natural state, the baffle is clamped on the inner side of the opening of the accommodating space, the push block protrudes from the opening of the accommodating space and then extends into the mounting slot. When the magnetic sensor device is inserted into the mounting slot, the slide rail slides into the slide slot, pushing the push block 2.4 inward, and the second spring 2.6 is compressed. It should be noted that after the housing of the magnetic sensor device is inserted into the mounting slot, even if the push block is pushed into the accommodating space, it remains protruding from the opening of the accommodating space. The compressed second spring applies a certain force to the housing of the magnetic sensor device to prevent it from shaking. In addition, in order to prevent the magnetic sensor device from hitting the push block and getting stuck during the insertion of the magnetic sensor device into the mounting slot, the side of the push block is set to an arc shape, so that the housing of the magnetic sensor device can smoothly pass when it contacts the push block.

[0044] Embodiment 5:

[0045] In the prior art, in order to realize continuous water level detection, the provided liquid level detection device includes a plurality of magnetic sensors of different heights and a float provided with a magnet, the plurality of magnetic sensors are arranged in a row in the vertical direction and arranged at equal intervals, the trajectory of the float also extends in the vertical direction, and the float slides up and down along the slide rail, and the specific calculation method is: it is necessary to obtain three magnetic sensors with larger output voltages, and then compare the output voltages of the three magnetic sensors to obtain the relative positions of the float and the three magnetic sensors, and then obtain the liquid level height where the float is located according to the relationship between the input voltage and the corresponding distance (the distance between the magnetic sensor and the float in the vertical direction), and the liquid level height corresponding to the position of the magnetic sensor. As is known, the magnetic induction range of the magnetic sensor is very small, and the effective range is usually within the length range of about 5 mm up and down, and in this embodiment, if the liquid level height is to be calculated, at least the output voltages of three magnetic sensors are obtained. In order to ensure that the float at a certain liquid level is simultaneously within the effective measurement range of the three magnetic sensors, the magnetic sensors need to be densely arranged. Therefore, if the liquid level in the medicine box is to be continuously measured, a large number of magnetic sensors arranged at intervals in the vertical direction are required, and the accuracy of obtaining the liquid level is not high.

[0046] In this embodiment, in order to overcome the above defects, the float device 7 in this embodiment includes a connecting plate 7.1, on which two parallel guide posts 7.2 are pierced, each guide post is divided into multiple sections by a limiting hole, the limiting holes 7.3 on the two guide posts 7.2 are staggered, and a float 7.4 with a fixed magnet is sleeved on the guide post in each limiting hole; the connecting plate 7.1 is attached to the side wall of the box; two rows of sensors are arranged in the vertical direction on the first circuit board 3.3 of the magnetic sensor device 3, each row includes a plurality of magnetic sensors, and the magnetic sensors on the two rows are staggered. In this embodiment, each row has three limiting holes, corresponding to one of the rows of sensors at the corresponding position on the first circuit board, and the row includes three magnetic sensors, and the three magnetic sensors correspond to the three limiting holes one by one, respectively, and in horizontal projection, the magnetic sensor is located in the middle of the corresponding limiting hole. Referring to the figure, the floats in the two rows of limit holes on the connecting plate are A, B, C, D, E, and F respectively. The corresponding magnetic sensors on the first circuit board are a, b, c, d, e, and f. The length of the limit hole is set in advance according to the effective range of the magnetic sensor, that is, if the effective range of the magnetic sensor is 5mm, then the length of the limit hole is set to 5mm. When the liquid level in the box is between floats A and B, floats A and D are both located at the bottom of the limit hole, floats B, C, and F are located at the top of the limit hole, and the input voltages of the magnetic sensors corresponding to the five floats are the same and the maximum value, only the input voltage corresponding to the E float is different. The first circuit board 3.3 calculates the current liquid level according to the input voltage of the e sensor, the relationship between the input voltage and L, and the height corresponding to the e sensor in the box. If the liquid level is at position G, the input voltage of the magnetic sensors b, c, d, and f reaches the maximum value within the range, and the control unit on the first circuit board will calculate the liquid level height values ​​corresponding to the input voltages of the a and e sensors respectively, and then calculate the average value to obtain the final liquid level height, that is, the liquid level height in the box.

[0047] The liquid level detection device with continuous liquid level measurement provided in this embodiment can effectively and accurately measure the liquid level at the corresponding position in the box, and compared with the existing liquid level detection device, within the same measurement range, fewer magnetic sensors are used to achieve more accurate measurement results.

[0048] Embodiment 6:

[0049] On the basis of the above embodiment, this embodiment provides a drone, comprising a fuselage and the medicine box in the above embodiment, wherein the medicine box is fixed on the fuselage.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A medicine box with a quick-detachable liquid level detection device, characterized in that: The invention comprises a box body (1), wherein the box body (1) is provided with a liquid level detection device, wherein the liquid level detection device comprises a magnetic sensor device (3), a float device (7) and an external connection device (2), wherein the float device (7) is fixed on a side wall inside the box body (1), the magnetic sensor device (3) is located outside the corresponding side wall, and the external connection device (2) is fixed outside the box body (1) and is detachably connected to the magnetic sensor device (3); the magnetic sensor device (3) comprises a housing (3.1), a first circuit board (3.3) and a plurality of magnetic sensors (3.4), wherein the plurality of magnetic sensors (3.4) are distributed on the first circuit board (3.3) in a vertical direction, and the first circuit board (3.3) is fixed inside the housing (3.1); the float device (7) comprises a guide device and a float (7.4) moving on the guide device in a vertical direction, and wherein a magnet is provided on the float (7.4); The external connection device (2) is provided with a mounting groove (2.1), the mounting groove (2.1) comprising a bottom opening and a side opening, guide rails (2.2) are provided on both inner walls of the mounting groove (2.1) along the length direction, and slide grooves (3.12) corresponding to the guide rails (2.2) are provided on both sides of the upper part of the housing (3.1) of the magnetic sensor device (3), and the upper part of the housing (3.1) is fixed in the mounting groove (2.1) via the guide rails (2.2) and the slide grooves (3.12) that are slidably connected; The housing (3.1) of the magnetic sensor device (3) is provided with a through slot communicating with the interior thereof, the through slots being multiple, each of which is provided with a spring ejector pin (3.2), the bottom of the spring ejector pin (3.2) being fixedly connected to the first circuit board (3.3) and the top of the spring ejector pin (3.2) extending out of the through slot; the external connection device (2) is provided with a second circuit board, the second circuit board is electrically connected with a connector (2.3), the top of the mounting slot (2.1) is provided with a probe hole corresponding to the spring ejector pin (3.2), the probe hole is provided with a fixed probe, one end of the fixed probe is provided with a metal sheet and the other end is fixed to the second circuit board; after the magnetic sensor device (3) and the external connection device (2) are mounted in coordination, the spring ejector pin (3.2) is inserted into the corresponding probe hole and then contacts the metal sheet to conduct the circuit; A locking device is provided in the installation groove (2.1), the locking device is located on the other side opposite to the side opening, and the locking device is clamped after the magnetic sensor device (3) is installed on the upper part of the installation groove (2.1); The locking device comprises a rotating shaft (6), a lock buckle (4) and a first spring (5); one end of the lock buckle (4) extends into the installation groove (2.1), the end is a barbed hook-shaped clamping portion (4.1); the middle part of the lock buckle (4) is rotatably connected to the side wall of the installation groove (2.1) via the rotating shaft (6); a support plate (2.5) extends outwardly from the external connection device (2) outside the installation groove (2.1); and the first spring (5) is connected between the other end of the lock buckle (4) and the support plate (2.5); a clamping groove (3.11) corresponding to the barbed hook-shaped clamping portion (4.1) is provided on the housing (3.1) of the magnetic sensor device (3); An elastic pusher is provided in a side wall of the installation groove (2.1); the elastic pusher is mounted on the upper part of the magnetic sensor device (3) in the installation groove (2.1) and abuts against the outer shell (3.1) of the magnetic sensor device (3); A housing space (2.7) is provided in one side wall of the installation slot (2.1), the housing space (2.7) being provided with an opening communicating with the interior of the installation slot (2.1); the elastic pusher comprises a push block (2.4) and a plurality of second springs (2.6); baffles (2.41) extend from both sides of the push block (2.4); the baffles (2.41) are clamped on the inner side of the opening; the push block (2.4) is adapted to the size of the opening; the second spring (2.6) is connected to the push block (2.4) and the inner side wall of the housing space (2.7); when the top of the housing (3.1) of the magnetic sensor device (3) is inserted into the installation slot (2.1), the push block (2.4) is pushed into the installation slot (2.1) and the second spring (2.6) is in a compressed state.

2. The medicine box according to claim 1, characterized in that: The float device (7) comprises a connecting plate (7.1), two parallel guide columns (7.2) are provided on the connecting plate (7.1), each guide column (7.2) is divided into multiple sections by a limiting hole (7.3), the limiting holes (7.3) on the two guide columns (7.2) are arranged in a staggered manner, and a float (7.4) with a fixed magnet is sleeved on the guide column (7.2) in each limiting hole (7.3); the connecting plate (7.1) is attached to the side wall of the box body (1); two rows of sensors are provided on the first circuit board (3.3) of the magnetic sensor device (3) in a vertical direction, each row comprising a plurality of magnetic sensors (3.4), and the magnetic sensors (3.4) on the two rows are arranged in a staggered manner.

3. The medicine box according to any one of claims 1-2, characterized in that: The outer shell of the magnetic sensor device (3) is a rectangular body, comprising an inner plate and an outer plate arranged opposite to each other, the outer surface of the inner plate being attached to the box body (1), and the first circuit board (3.3) being attached to the inner surface of the inner plate.

4. A drone, characterized in that: It comprises a fuselage and the medicine box as described in any one of claims 1 to 3, wherein the medicine box is fixed on the fuselage.

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