Optical fiber communication pay-off box for unmanned aerial vehicle and use method thereof

Abstract

The invention discloses an optical fiber communication pay-off box for an unmanned aerial vehicle and a use method thereof, and relates to the technical field of unmanned aerial vehicles, the optical fiber communication pay-off box comprises a pay-off box shell, and one end of the pay-off box shell is provided with a wire outlet; the pay-off shaft is a tubular body of which the two ends are communicated; the guide flange is fixedly connected to the end part, close to the wire outlet direction, of the pay-off shaft, and a wire passing gap is formed between the guide flange and the inner wall of the pay-off box shell; and the pay-off shaft is fixed with the interior of the pay-off box shell through the connecting assembly. According to the pay-off box, gravity automatic pay-off is achieved through flight of the unmanned aerial vehicle and the gravity of optical fibers, stable and reliable pay-off of the optical fibers can be achieved in the long-distance flight operation process of the unmanned aerial vehicle, the communication quality and efficiency between the unmanned aerial vehicle and the ground are guaranteed, and the pay-off box has wide application prospects and remarkable practical value.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicles, and in particular to an optical fiber communication cable box for unmanned aerial vehicles and a use method thereof. Background Art

[0002] With the continuous development of drone technology, its application scenarios are becoming more and more extensive. In some tasks that require long-distance data transmission or high-precision operations, optical fiber communication has significant advantages such as large transmission bandwidth and strong anti-interference ability.

[0003] However, existing UAVs lack a specialized, efficient and stable pay-off device when carrying optical fibers for operation. The usual pay-off method easily leads to problems such as optical fiber entanglement, wear or uneven pay-off, which affects the reliability of optical fiber communication and the flight performance of the UAV. It is difficult to meet the requirements of complex tasks for precise control and stable transmission of UAV optical fiber pay-off. Therefore, an optical fiber communication pay-off box for UAVs and a method of using the same are proposed. Summary of the invention

[0004] The object of the present invention is to provide a fiber optic communication cable box for unmanned aerial vehicles and a method of using the same, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: an optical fiber communication cable box for a drone, comprising: A wire-releasing box housing, wherein the wire-releasing box housing is a hollow structure with two ends connected, and a wire outlet is provided at one end of the wire-releasing box housing; A pay-off shaft, which is a tubular body with two ends connected, and is fixedly arranged in the inner cavity of the pay-off box housing, and is used for winding and positioning the optical fiber in the pay-off box housing; A guide flange, wherein the guide flange is fixedly connected to the end of the pay-off shaft close to the outlet direction, and a wire-passing gap is provided between the guide flange and the inner wall of the pay-off box housing, and the wire-passing gap is used for the transmission of the optical fiber; A connecting component is arranged at the end of the wire-paying shaft away from the wire outlet, and the wire-paying shaft is fixed to the inside of the wire-paying box shell through the connecting component.

[0006] Preferably, the diameter of the wire-release box housing from the guide flange to the wire outlet gradually decreases in the direction approaching the wire outlet, and the wire outlet is in the shape of a trumpet that turns outward.

[0007] Preferably, a buffer layer is fixedly provided on the inner wall of the housing of the wire-releasing box, and the buffer layer is any one of foamed polyethylene, elastic rubber or polyurethane foam plastic.

[0008] Preferably, the guide flange is provided with a guide hole connected to the inner cavity of the wire-paying box shell, and the guide hole is used to guide the optical fiber located on the wire-paying shaft to connect with the communication interface of the drone.

[0009] Preferably, the connection assembly comprises: A limiting raised flange, wherein the limiting raised flange is fixedly connected to the end of the pay-off shaft away from the guide flange, and a plurality of connecting screw holes are spaced apart on the outer peripheral wall of the limiting raised flange; A positioning slot, wherein the positioning slot is provided at the end of the inner wall of the wire-releasing box housing away from the wire outlet, the limiting protrusion flange is movably plugged into the end of the positioning slot, and the outer wall of the wire-releasing box housing is provided with a fixing hole connected to the end of the positioning slot; The fastener is movably inserted into the fixing hole, and the housing of the wire release box is fixedly connected to the limiting raised flange through the fastener.

[0010] Preferably, the guide flange has a protruding portion protruding outward on the side facing the wire outlet, and an auxiliary support assembly is provided on the protruding portion of the guide flange, and the auxiliary support assembly is used to assist in supporting the end of the wire pay-off shaft in the inner cavity of the wire pay-off box shell.

[0011] Preferably, the auxiliary support assembly comprises: A first bearing, wherein the first bearing is fixedly sleeved on a raised portion on one side of the guide flange; Auxiliary support rods, the auxiliary support rods are two and symmetrically fixedly connected to the outer peripheral wall of the first bearing; The roller is rotatably connected to the end of the auxiliary support rod away from the first bearing, and the outer wall of the roller is in contact with the inner wall of the wire release box shell.

[0012] Preferably, the auxiliary support rod comprises: A sliding tube, wherein the sliding tube is hollow with two ends connected, and both ends of the sliding tube are provided with a rotation slot; Two connecting rods, the two connecting rods are symmetrically and movably inserted into the rotating slots at both ends of the sliding tube, one end of one of the connecting rods is fixedly connected to the outer wall of the first bearing, and one end of the other connecting rod is rotatably connected to the roller; A connecting piece is arranged between opposite ends of two connecting rods and is used to lock the position between the two connecting rods.

[0013] Preferably, the connecting member comprises an internal threaded tube and an external threaded rod, the internal threaded tube is fixedly connected to one end of one of the connecting rods close to the sliding tube, the external threaded rod is fixedly connected to another end of the connecting rod close to the sliding tube, and the inner wall of the internal threaded tube is threadedly connected to the outer wall of the external threaded rod; A second bearing is fixedly connected inside the rotating slot, an inner ring of the second bearing is fixedly connected to the outer wall of the connecting rod, and a smooth sleeve is fixedly sleeved on the outer wall of the guide flange.

[0014] On the other hand, the present invention also provides a method for using the optical fiber communication cable box for drones, using the optical fiber communication cable box for drones described above, comprising the following steps: Step 1: Wind the optical fiber around the outer wall of the pay-off shaft through the take-up machine, then install the pay-off shaft with the limit raised flange and the guide flange into the inner cavity of the pay-off box shell, and use fasteners to firmly fix the pay-off box shell and the limit raised flange to complete the installation of the pay-off shaft in the pay-off box shell, then fix the pay-off box shell on the drone, and make one end of the optical fiber pass through the inner cavity of the pay-off shaft from the guide hole, and then pass out in the direction close to the limit raised flange and extend to the outer wall of the pay-off box shell, and connect with the communication interface on the drone, so as to complete the installation of the pay-off box shell on the drone; Step 2. After the drone takes off, as the drone flies to a certain height, the gravity of the optical fiber itself will generate a downward pulling force, and one end of the optical fiber wound on the pay-off shaft extends from the wire gap between the guide flange and the pay-off box shell to the wire outlet position, and extends out from the wire outlet position. As the drone flies and is affected by factors such as wind and airflow in the external environment, the pay-off box shell will shake and move on the drone, causing the optical fiber to gradually be released from the pay-off shaft under the action of gravity, so that the optical fiber uses gravity to transmit along the wire outlet position of the pay-off box shell, and through the guiding and protective function of the guide flange, the optical fiber can be smoothly connected to the ground end and stable communication signal transmission can be carried out.

[0015] Technical effects and advantages of the present invention: The present invention provides a wire-paying box shell with two connected ends and a wire outlet at one end, and cooperates with the arrangement of a wire-paying shaft, a guide flange and a connecting assembly in the wire-paying box shell. The wire-passing gap formed between the wire-paying box shell and the guide flange can be used to guide and protect the transmission process of the optical fiber. When the unmanned aerial vehicle is flying, the flight of the unmanned aerial vehicle and the gravity of the optical fiber can be used to realize automatic gravity pay-out. During the long-distance flight operation of the unmanned aerial vehicle, the optical fiber can be stably and reliably paid out, thereby ensuring the communication quality and efficiency between the unmanned aerial vehicle and the ground. The present invention has broad application prospects and significant practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the inner wall structure of the wire box shell of the present invention.

[0017] Figure 2 It is a partial three-dimensional cross-sectional structural schematic diagram of the wire box housing of the present invention.

[0018] Figure 3It is a schematic diagram of the three-dimensional structure of the guide flange of the present invention.

[0019] Figure 4 It is a schematic diagram of the partial front cross-sectional structure of the auxiliary support rod of the present invention.

[0020] In the figure: 100, wire-paying box shell; 101, wire-passing gap; 102, wire outlet; 103, buffer layer; 104, positioning slot; 105, fixing hole; 200, wire-paying shaft; 300, limiting raised flange; 400, guide flange; 401, guide hole; 402, first bearing; 403, auxiliary support rod; 431, sliding tube; 432, rotating slot; 433, connecting rod; 434, internally threaded tube; 435, externally threaded rod; 436, second bearing; 404, roller; 405, smooth sleeve. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of 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] The present invention provides Figure 1-Figure 4 A fiber optic communication cable box for an unmanned aerial vehicle is shown.

[0023] Embodiment 1, including a wire-releasing box housing 100, a wire-releasing shaft 200, a guide flange 400 and a connecting assembly, wherein the wire-releasing box housing 100 is a hollow structure with two ends connected, and a buffer layer 103 is fixedly arranged on the inner wall of the wire-releasing box housing 100, and the buffer layer 103 is any one of foamed polyethylene, elastic rubber or polyurethane foam plastic. By arranging the buffer layer 103 on the inner wall of the wire-releasing box housing 100, the vibration generated by the wire-releasing box housing 100 during the flight of the drone can be effectively absorbed and reduced. The impact on the wire-releasing shaft 200 and the optical fiber caused by the vibration generated by the wire-releasing box housing 100 during the flight of the drone can be reduced. Due to the movement of the drone during flight, the wire-releasing box housing 100 The wire box housing 100 generates shaking and displacement. During this process, the buffer layer 103 on the inner wall of the wire box housing 100 can effectively absorb and reduce the impact of vibration on the wire-paying shaft 200 and the optical fiber, so that the optical fiber can be stably released; an outlet 102 is provided at one end of the wire box housing 100, and the diameter of the position from the guide flange 400 to the outlet 102 on the wire box housing 100 gradually decreases along the direction close to the outlet 102, and the outlet 102 is in the shape of a trumpet with an outward-turned mouth. The inner wall of the outlet 102 is made of a low-friction coefficient material such as ceramic or polytetrafluoroethylene, so that the inner wall surface of the outlet 102 is smooth, reducing the friction between the optical fiber and the outlet. The friction force during contact makes the pay-off of the optical fiber smoother, reduces the wear caused by friction, and improves the protection of the optical fiber; the pay-off shaft 200 is a tubular body connected at both ends, and the pay-off shaft 200 is fixedly arranged in the inner cavity of the pay-off box housing 100. The pay-off shaft 200 is used for the winding and positioning of the optical fiber in the pay-off box housing 100. The optical fiber can be neatly wound on the outer wall of the pay-off shaft 200 by a take-up machine. The guide flange 400 is fixedly connected to the end of the pay-off shaft 200 close to the outlet 102. A wire passing gap 101 is provided between the guide flange 400 and the inner wall of the pay-off box housing 100. The wire passing gap 101 Used for the transmission of optical fiber, after one end of the optical fiber is released from the pay-off shaft 200, it passes through the wire passing gap 101 between the guide flange 400 and the pay-off box shell 100, which guides and protects the pay-off process of the optical fiber, so that the optical fiber can maintain a stable pay-off movement. The connecting component is arranged at the end of the pay-off shaft 200 away from the outlet 102, and the pay-off shaft 200 is fixed to the inside of the pay-off box shell 100 through the connecting component. The setting of the connecting component can enable the pay-off shaft 200 to be stably installed in the inner cavity of the pay-off box shell 100, thereby maintaining the stability of the pay-off process of the pay-off shaft 200.

[0024] It should be noted that the pay-out of the optical fiber in the pay-out box shell 100 adopts the principle of gravity pay-out. After the UAV flies and reaches a certain height, the gravity of the optical fiber itself will generate a downward pulling force. As the UAV flies, the optical fiber naturally slides out of the pay-out box shell 100 under the action of gravity and is released from the outlet 102. In this process, the flight attitude and speed of the UAV have an important influence on the pay-out process. When the UAV flies forward at a predetermined inclination angle, the optical fiber will be gradually released in the direction of flight under the drive of the UAV. The flight speed of the UAV greatly exceeds the speed at which the optical fiber is released. At the same time, in order to prevent the optical fiber from being knotted or entangled due to excessively fast release, the UAV needs to keep the feeding stable on the flight path to avoid sudden acceleration, deceleration or turning.

[0025] Among them, a guide hole 401 connected to the inner cavity of the wire-paying box shell 100 is provided on the guide flange 400, and the guide hole 401 is used to guide the optical fiber located on the wire-paying shaft 200 to connect with the communication interface of the drone. The end of the optical fiber different from the wire-paying shaft passes through the guide hole 401 into the wire-paying shaft 200, and extends out from the side port of the wire-paying box shell 100 away from the wire outlet 102 along the cavity of the wire-paying shaft 200, and is connected to the communication interface on the drone, so that the communication between the drone and the ground remains stably connected.

[0026] Furthermore, the connection assembly includes a limiting protruding flange 300, a positioning slot 104 and a fastener, the limiting protruding flange 300 is fixedly connected to the end of the pay-off shaft 200 away from the guide flange 400, a plurality of connecting screw holes are arranged at intervals on the outer peripheral wall of the limiting protruding flange 300, the positioning slot 104 is arranged at the end of the inner wall of the pay-off box housing 100 away from the outlet 102, the limiting protruding flange 300 is movably plugged into the end of the positioning slot 104, and the outer wall of the pay-off box housing 100 is provided with a fixing hole 100 connected to the end of the positioning slot 104. 5. The fastener is movably inserted into the fixing hole 105, and the wire-releasing box housing 100 is fixedly connected to the limiting protruding flange 300 through the fastener. The limiting protruding flange 300 can be inserted into the wire-releasing box housing 100 for positioning through the positioning slot 104, and then the bolt is inserted into the fixing hole 105 and connected to the connecting screw hole at the outer peripheral wall of the limiting protruding flange 300, so that the position between the limiting protruding flange 300 and the wire-releasing box housing 100 can be locked and fixed, thereby ensuring that the wire-releasing shaft 200 is firmly installed in the wire-releasing box housing 100.

[0027] Embodiment 2, on the basis of embodiment 1, the guide flange 400 has a protruding portion protruding outward on the side facing the outlet 102, and an auxiliary support assembly is provided on the protruding portion of the guide flange 400, and the auxiliary support assembly is used to assist in supporting the end of the pay-off shaft 200 in the inner cavity of the pay-off box shell 100. The auxiliary support assembly is provided to provide auxiliary supporting force between the guide flange 400 and the inner wall of the pay-off box shell 100, so as to prevent the guide flange 400 from shaking easily due to being placed in the air and causing pressure on the optical fiber pay-off process. At the same time, the auxiliary support assembly can avoid blocking the optical fiber pay-off process to keep the optical fiber pay-off process smooth.

[0028] Among them, the auxiliary support assembly includes a first bearing 402, an auxiliary support rod 403 and a roller 404. The first bearing 402 is fixedly sleeved on a raised portion on one side of the guide flange 400. The auxiliary support rod 403 is two and symmetrically fixedly connected to the outer peripheral wall of the first bearing 402. The roller 404 is rotatably connected to the end of the auxiliary support rod 403 away from the first bearing 402. The outer wall of the roller 404 fits the inner wall of the wire release box shell 100; Among them, the auxiliary support rod 403 includes a sliding tube 431, two connecting rods 433 and a connecting piece. The sliding tube 431 is hollow with two ends connected. Both ends of the sliding tube 431 are provided with rotating grooves 432. The two connecting rods 433 are symmetrically and movably inserted into the rotating grooves 432 at both ends of the sliding tube 431. One end of one of the connecting rods 433 is fixedly connected to the outer wall of the first bearing 402, and one end of the other connecting rod 433 is rotatably connected to the roller 404 Then, a connecting piece is arranged between the opposite ends of the two connecting rods 433, and the connecting piece is used to lock the position between the two connecting rods 433. By setting the guide flange 400 to be a protrusion on one side, the first bearing 402 can be installed, so that the auxiliary support rod 403 installed on the outer wall of the first bearing 402 can rotate radially, so that the auxiliary support rod 403 can be driven to rotate radially when in contact with the optical fiber, avoiding affecting the optical fiber pay-off process, and the auxiliary support rod 403 contacts the inner wall of the pay-off box shell 100 through the roller 404. The rotatable roller 404 can be used to reduce the friction resistance between the auxiliary support rod 403 and the inner wall of the pay-off box shell 100 when the auxiliary support rod 403 rotates with the first bearing 402. Thereby, not only stable support for the end of the guide flange 400 is achieved, but also the rotatable placement of the auxiliary support rod 403 can be used to hinder the optical fiber during the optical fiber pay-off process.

[0029] In a preferred embodiment, the connecting member includes an internal threaded tube 434 and an external threaded rod 435, the internal threaded tube 434 is fixedly connected to one end of one of the connecting rods 433 close to the sliding tube 431, the external threaded rod 435 is fixedly connected to the other end of the connecting rod 433 close to the sliding tube 431, and the inner wall of the internal threaded tube 434 is threadedly connected to the outer wall of the external threaded rod 435; a second bearing 436 is fixedly connected to the inside of the rotating groove 432, the inner ring of the second bearing 436 is fixedly connected to the outer wall of the connecting rod 433, and a smooth sleeve 405 is fixedly sleeved on the outer wall of the guide flange 400. By using the auxiliary support rod 403, the two connecting rods 433 are connected to the sliding tube 431 by using the second bearing 436, which can ensure the rotatability of the sliding tube 431, and the threaded connection between the internal threaded tube 434 and the external threaded rod 435 can be achieved. Convenient disassembly and assembly can be achieved between the connecting rod 433 and the sliding tube 431, thereby facilitating assembly and maintenance.

[0030] Another invention, this embodiment also provides a method for using an optical fiber communication cable box for a drone, using the above-mentioned optical fiber communication cable box for a drone, comprising the following steps: Step 1: Wind the optical fiber around the outer wall of the pay-off shaft 200 through a take-up machine, then install the pay-off shaft 200 with the limiting raised flange 300 and the guide flange 400 into the inner cavity of the pay-off box shell 100, and use fasteners to firmly fix the pay-off box shell 100 and the limiting raised flange 300 to complete the installation of the pay-off shaft 200 in the pay-off box shell 100, then fix the pay-off box shell 100 on the drone, and make one end of the optical fiber pass through the inner cavity of the pay-off shaft 200 from the guide hole 401, and then pass out in the direction close to the limiting raised flange 300 and extend to the outer wall of the pay-off box shell 100, and connect with the communication interface on the drone, thereby completing the installation of the pay-off box shell 100 on the drone; Step 2. After the drone takes off, as the drone flies to a certain height, the gravity of the optical fiber itself will generate a downward pulling force, and one end of the optical fiber wound on the pay-off shaft 200 extends from the wire gap 101 between the guide flange 400 and the pay-off box shell 100 to the wire outlet 102, and extends out from the wire outlet 102. As the drone flies and is affected by factors such as wind and airflow in the external environment, the pay-off box shell 100 shakes and moves on the drone, so that the optical fiber is gradually released from the pay-off shaft 200 under the action of gravity, and the optical fiber is transmitted along the wire outlet 102 of the pay-off box shell 100 by gravity, and through the guiding and protective function of the guide flange 400, the optical fiber can be smoothly connected to the ground end and stable communication signal transmission can be carried out.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An optical fiber communication cable box for unmanned aerial vehicles, characterized in that: include: A wire-releasing box housing (100), the wire-releasing box housing (100) being a hollow structure with two ends connected, and a wire outlet (102) being provided at one end of the wire-releasing box housing (100); A pay-off shaft (200), the pay-off shaft (200) being a tubular body with two ends connected, the pay-off shaft (200) being fixedly arranged in the inner cavity of the pay-off box housing (100), the pay-off shaft (200) being used for winding and positioning the optical fiber in the pay-off box housing (100); A guide flange (400), the guide flange (400) being fixedly connected to an end of the pay-off shaft (200) close to the wire outlet (102), a wire-passing gap (101) being provided between the guide flange (400) and the inner wall of the pay-off box housing (100), the wire-passing gap (101) being used for the transmission of optical fibers; A connecting assembly is provided at an end of the wire-paying shaft (200) away from the wire outlet (102); the wire-paying shaft (200) is fixed to the inside of the wire-paying box housing (100) via the connecting assembly.

2. The optical fiber communication cable box for unmanned aerial vehicles according to claim 1, characterized in that: The diameter of the wire-release box housing (100) from the guide flange (400) to the wire outlet (102) gradually decreases in a direction approaching the wire outlet (102), and the wire outlet (102) is in the shape of a trumpet that turns outward.

3. The optical fiber communication cable box for unmanned aerial vehicles according to claim 2, characterized in that: A buffer layer (103) is fixedly provided on the inner wall of the wire-releasing box housing (100); the buffer layer (103) is any one of foamed polyethylene, elastic rubber or polyurethane foam plastic.

4. The optical fiber communication cable box for unmanned aerial vehicles according to claim 3, characterized in that: The guide flange (400) is provided with a guide hole (401) that is in communication with the inner cavity of the pay-off box housing (100), and the guide hole (401) is used to guide the optical fiber on the pay-off shaft (200) to be connected to the communication interface of the drone.

5. The optical fiber communication cable box for unmanned aerial vehicles according to claim 4, characterized in that: The connection component comprises: A limiting protruding flange (300), wherein the limiting protruding flange (300) is fixedly connected to an end of the pay-off shaft (200) away from the guide flange (400), and a plurality of connecting screw holes are spaced apart on an outer peripheral wall of the limiting protruding flange (300); A positioning slot (104), the positioning slot (104) being formed at an end of the inner wall of the wire-releasing box housing (100) away from the wire outlet (102), the limiting protruding flange (300) being movably plugged into the end of the positioning slot (104), and the outer wall of the wire-releasing box housing (100) being formed with a fixing hole (105) connected to the end of the positioning slot (104); A fastener is movably inserted into the fixing hole (105), and the wire-release box housing (100) is fixedly connected to the limiting protruding flange (300) via the fastener.

6. The optical fiber communication cable box for unmanned aerial vehicles according to claim 5, characterized in that: The guide flange (400) has a protruding portion protruding outward on one side facing the wire outlet (102), and an auxiliary support component is provided on the protruding portion of the guide flange (400), and the auxiliary support component is used to assist in supporting the end of the pay-off shaft (200) in the inner cavity of the pay-off box housing (100).

7. The optical fiber communication cable box for unmanned aerial vehicles according to claim 1, characterized in that: The auxiliary support assembly comprises: A first bearing (402), the first bearing (402) being fixedly sleeved on a raised portion on one side of the guide flange (400); Auxiliary support rods (403), the auxiliary support rods (403) being two and symmetrically fixedly connected to the outer peripheral wall of the first bearing (402); A roller (404) is rotatably connected to the end of the auxiliary support rod (403) away from the first bearing (402), and the outer wall of the roller (404) is in contact with the inner wall of the wire-releasing box housing (100).

8. The optical fiber communication cable box for unmanned aerial vehicles according to claim 2, characterized in that: The auxiliary support rod (403) comprises: A sliding tube (431), the sliding tube (431) is hollow with two ends connected, and both ends of the sliding tube (431) are provided with a rotation slot (432); Two connecting rods (433), the two connecting rods (433) are symmetrically and movably plugged into the rotating slots (432) at both ends of the sliding tube (431), one end of one of the connecting rods (433) is fixedly connected to the outer wall of the first bearing (402), and one end of the other connecting rod (433) is rotatably connected to the roller (404); A connecting piece, the connecting piece is arranged between opposite ends of the two connecting rods (433), and the connecting piece is used to lock the position between the two connecting rods (433).

9. The optical fiber communication cable box for unmanned aerial vehicles according to claim 3, characterized in that: The connecting member comprises an internal threaded tube (434) and an external threaded rod (435), wherein the internal threaded tube (434) is fixedly connected to one end of one of the connecting rods (433) close to the sliding tube (431), and the external threaded rod (435) is fixedly connected to one end of the other connecting rod (433) close to the sliding tube (431), and the inner wall of the internal threaded tube (434) is threadedly connected to the outer wall of the external threaded rod (435); A second bearing (436) is fixedly connected inside the rotating slot (432), an inner ring of the second bearing (436) is fixedly connected to the outer wall of the connecting rod (433), and a smooth sleeve (405) is fixedly sleeved on the outer wall of the guide flange (400).

10. A method for using an optical fiber communication cable box for a drone, using the optical fiber communication cable box for a drone as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1, wind the optical fiber around the outer wall of the pay-off shaft (200) through a take-up machine, then install the pay-off shaft (200) with a limit raised flange (300) and a guide flange (400) into the inner cavity of the pay-off box shell (100), and use fasteners to firmly fix the pay-off box shell (100) and the limit raised flange (300) to complete the installation of the pay-off shaft (200) in the pay-off box shell (100), then fix the pay-off box shell (100) on the drone, and make one end of the optical fiber pass through the inner cavity of the pay-off shaft (200) from the guide hole (401), and then pass out in the direction close to the limit raised flange (300) and extend to the outer wall of the pay-off box shell (100), and connect with the communication interface on the drone, thereby completing the installation of the pay-off box shell (100) on the drone; Step 2: After the drone takes off, as the drone flies to a certain height, the gravity of the optical fiber itself generates a downward pulling force, and one end of the optical fiber wound on the pay-off shaft (200) extends from the wire gap (101) between the guide flange (400) and the pay-off box housing (100) to the wire outlet (102) and extends from the wire outlet (102). As the drone flies and is affected by factors such as wind and airflow in the external environment, the pay-off box housing (100) shakes and moves on the drone, causing the optical fiber to be gradually released from the pay-off shaft (200) under the action of gravity, so that the optical fiber is transmitted along the wire outlet (102) of the pay-off box housing (100) by gravity, and through the guiding and protective effects of the guide flange (400), the optical fiber can be smoothly connected to the ground end and stable communication signal transmission can be performed.

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