A directional shouting device and a UAV

Abstract

The application discloses a directional shouting device and a UAV. The directional shouting device comprises a fairing and a loudspeaker module. The fairing is used for being connected with the UAV. The fairing has a concave cavity which is formed by sequentially extending from a bottom cover wall of the fairing to an opening cover wall of the fairing. The loudspeaker module is connected with the bottom cover wall, and the concave cavity accommodates at least part of the loudspeaker module. When the directional shouting device is arranged on the UAV, the bottom cover wall is connected with the UAV, and the UAV is located on a side of the fairing away from the concave cavity. The fairing is used for guiding the downwash airflow of the UAV to be shunted along the outer surface of the fairing.

Description

Technical Field

[0001] This application relates to the field of directional loudspeaker technology, and particularly to a directional loudspeaker device and a drone. Background Technology

[0002] With the widespread application of drones in construction inspections, emergency rescue, and other scenarios, aerial communication via loudspeakers has become a common method of information transmission. In related technologies, most drone loudspeaker devices increase the playback volume by increasing speaker power to overcome wind noise and interference, thereby improving the drone's communication performance. However, using more powerful speakers increases the drone's energy consumption and payload burden, leading to a decrease in the drone's operational performance.

[0003] Therefore, improving the broadcasting performance of drones while ensuring their operational performance has become an urgent technical problem to be solved. Utility Model Content

[0004] This application aims to propose a directional loudspeaker device and a drone that can improve loudspeaker performance while ensuring the operational performance of the drone.

[0005] In a first aspect, embodiments of this application provide a directional loudspeaker device for mounting on a drone, the device comprising: A fairing for connection with the UAV, the fairing having a concave cavity formed by the concave cavity gradually expanding from the bottom wall of the fairing toward the opening wall of the fairing; A speaker module connected to the bottom cover wall, and the concave cavity housing at least a portion of the speaker module, wherein: When the directional shouting device is installed on the drone, the bottom cover is connected to the drone, and the drone is located on the side of the flow guide away from the concave cavity. The flow guide is used to guide the downwash airflow of the drone to be diverted along the outer surface of the flow guide.

[0006] According to some embodiments of this application, the flow deflector includes: A flow-guiding shell, the flow-guiding shell being used for connection with the drone; A sound-absorbing layer is disposed on the airflow guide shell and is used to absorb noise from the UAV.

[0007] According to some embodiments of this application, the sound-absorbing layer is disposed on the surface of the flow-guiding shell; and / or, the sound-absorbing layer is embedded in the interior of the flow-guiding shell.

[0008] According to some embodiments of this application, the apparatus further includes: A first vibration damping connection mechanism is used to connect the UAV and the fairing, and the first vibration damping connection mechanism is used to attenuate vibrations from the UAV.

[0009] According to some embodiments of this application, the apparatus further includes: The second vibration damping connection mechanism is connected between the fairing and the speaker module to attenuate vibrations from the drone.

[0010] According to some embodiments of this application, the apparatus further includes: A directional adjustment mechanism is connected between the fairing and the speaker module, and the directional adjustment mechanism is used to adjust the orientation of the speaker module.

[0011] According to some embodiments of this application, the orientation adjustment mechanism includes: A fixed plate is fixedly connected to the flow guide cover; A rotating disk, which is fixedly connected to the speaker module; A rotating shaft, one end of which is fixedly connected to the fixed disk, and the rotating disk is rotatably sleeved on the other end of the rotating shaft; A damping retainer is disposed between the fixed disk and the rotating disk.

[0012] According to some embodiments of this application, the apparatus further includes: A snap fastener is mounted on the air deflector. A mounting bracket is installed on the drone, and the mounting bracket is provided with a slot for engaging with the buckle; A first magnetic suction element is disposed within the card holder; The second magnetic component is disposed within the buckle, and the first magnetic component and the second magnetic component are used to attract each other.

[0013] According to some embodiments of this application, the speaker module has a honeycomb rectifier mesh at its sound output end.

[0014] According to some embodiments of this application, the sound output end of the speaker module is provided with a waterproof and sound-permeable membrane.

[0015] Secondly, embodiments of this application provide a drone, including the directional loudspeaker device described above.

[0016] In this embodiment, by setting a shroud above the speaker module, the outer surface of the shroud guides the downwash airflow generated during the drone's flight to split to both sides, thereby reducing the direct impact of the airflow on the speaker module's sound outlet area, effectively reducing wind noise caused by airflow disturbance, making the voice propagation direction of the speaker module more focused and stable, improving the clarity of the drone's shouting in flight, and resulting in a better shouting effect.

[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0018] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is an installation diagram of an embodiment of the directional loudspeaker device provided in this application; Figure 2 A schematic cross-sectional view of the overall structure of an embodiment of the directional loudspeaker device provided in this application; Figure 3 A schematic diagram of the orientation adjustment mechanism in an embodiment of the directional loudspeaker device provided in this application; Figure 4 A schematic diagram of the structure of the vibration-damping rubber screw in the embodiment of the directional shouting device provided in this application.

[0019] Figure label: 1. Drone; 2. Camera; 3. Quick-release magnetic assembly; 4. Vibration-damping rubber screw; 5. Flow deflector; 6. Control and power amplifier module; 7. Speaker module; 8. Connector; 9. Connecting plate; 10. Orientation adjustment mechanism; 10. Base plate; 101. Slot; 301. First magnetic component; 302. First plastic shell; 303. Buckle; 304. Second magnetic component; 305. Second plastic shell; 306. Locking nut; 401. Metal washer; 402. Rubber vibration damper; 403. Thread. 404 rod, 501 airflow guide shell, 502 sound-absorbing layer, 901 magnet, 902 magnetic guide plate, 903 downward directional sound channel, 904 dust cover, 905 T-shaped magnetic guide column, 906 voice coil, 907 diaphragm, 908 pressing edge, 909 honeycomb rectifier mesh, 9010 waterproof and sound-permeable membrane, 1001 fixed plate, 1002 rotating shaft, 1003 rotary bearing, 1004 damping friction plate, 1005 rotating disk, 1006 elastic compression clamping plate. Detailed Implementation

[0020] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0021] In the description of this application, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0022] In the description of this application, "multiple" refers to two or more. The use of "first" and "second" is for the purpose of distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or the order in which the technical features are indicated.

[0023] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0024] The following is based on Figures 1 to 4 This application describes the directional loudspeaker device and drone provided in its embodiments.

[0025] like Figure 1 As shown, this application embodiment provides a directional loudspeaker device for installation on a drone 1, such as... Figure 2 As shown, the device includes: The fairing 5 is used to connect with the UAV 1. The fairing 5 has a concave cavity, which is formed by gradually expanding and extending from the bottom wall of the fairing 5 toward the opening wall of the fairing 5. A speaker module 7 is connected to a bottom cover wall, and a concave cavity houses at least a portion of the speaker module 7, wherein: When the directional shouting device is installed on the drone 1, the bottom cover is connected to the drone 1, and the drone 1 is located on the side of the guide shroud 5 away from the concave cavity. The guide shroud 5 is used to guide the downwash airflow of the drone 1 to be diverted along the outer surface of the guide shroud 5.

[0026] In this embodiment, by setting a flow guide 5 above the speaker module 7, the outer surface of the flow guide 5 guides the downwash airflow generated by the drone 1 during flight to split to both sides, thereby reducing the direct impact of the airflow on the sound outlet area of ​​the speaker module 7, effectively reducing the wind noise caused by airflow disturbance, making the voice propagation direction of the speaker module 7 more focused and stable, improving the clarity of the drone 1's shouting in flight, and achieving a good shouting effect.

[0027] In some embodiments of this application, the directional loudspeaker device includes a fairing 5 and a speaker module 7. The fairing 5 is used to connect to the drone 1. The fairing 5 has a concave cavity, which is formed by gradually expanding from the bottom wall of the fairing 5 towards the open-face wall. Specifically, the bottom wall is the wall of the fairing 5 closest to the drone 1, and the open-face wall is the wall of the fairing 5 away from the drone 1 and is open in shape. The concave cavity gradually expands from the bottom wall towards the open-face wall, forming a structure resembling a horn or flared opening. When the directional loudspeaker device is installed on the drone 1, the bottom wall is located above and connected to the drone 1, the open-face wall is located below and faces the target area on the ground, and the drone 1 is located on the side of the fairing 5 away from the concave cavity.

[0028] The speaker module 7 is connected to the bottom cover wall, and at least a portion of the speaker module 7 is housed within the concave cavity. That is, the speaker module 7 can be entirely contained within the concave cavity, or it can extend only partially into the concave cavity, with the remainder protruding outside. The sound-emitting end of the speaker module 7 faces the opening of the cover wall, i.e., towards the target area on the ground.

[0029] During the flight of UAV 1, the high-speed rotation of the rotor generates a strong downwash airflow. This airflow flows downwards from the direction of UAV 1, and when it reaches the position of the fairing 5, the outer surface of the fairing 5 guides the downwash airflow to the periphery of the fairing 5, causing the airflow to bypass the sound output area below the fairing 5. Since the speaker module 7 is housed in the concave cavity of the fairing 5, the fairing 5's walls shield and surround the speaker module 7, further reducing the direct impact of the airflow on the speaker module 7 and its sound output end, thus reducing wind noise and airflow disturbance.

[0030] The shape of the concave cavity of the fairing 5 is not limited. For example, the fairing 5 can be umbrella-shaped, shallowly conical, arc-shaped, or multi-faceted. The concave cavity can be conical, pyramidal, hemispherical, or other geometric shapes that gradually widen from the bottom to the opening. The fairing 5 can be connected to the UAV 1 in various ways, such as by bolts, snap-fit ​​304, magnetic connection, or quick-release connector 8. The speaker module 7 can also be connected to the bottom cover wall in various ways, such as by screw fixing, snap-fit ​​fixing, adhesive fixing, or indirect fixing via intermediate connector 8. The extent to which the concave cavity accommodates the speaker module 7 can be adjusted according to actual needs. For example, the speaker module 7 can be completely accommodated within the concave cavity, or only the sound-emitting end can extend into the concave cavity, with the rest located outside the concave cavity.

[0031] In some embodiments of this application, such as Figure 1 As shown, the drone 1 is equipped with a camera 2, which is used to perform construction inspection, on-site observation or target identification tasks.

[0032] In some embodiments of this application, such as Figure 2 As shown, the fairing 5 includes: A flow guide housing 501 is used to connect with the UAV 1; The sound-absorbing layer 502 is disposed on the flow guide shell 501 and is used to absorb noise from the UAV 1.

[0033] In this embodiment, the fairing 5 includes a fairing shell 501 and a sound-absorbing layer 502 disposed on the fairing shell 501. During the flight of the UAV 1, when noise from the direction of the UAV 1's rotor propagates downwards, it first encounters the obstruction of the fairing shell 501, and part of the noise is reflected back to the direction of the UAV 1, thereby reducing the noise energy that directly reaches the sound output area of ​​the speaker module 7. At the same time, the residual noise that is not reflected and enters the fairing 5, especially its high-frequency components, is further absorbed and attenuated by the sound-absorbing layer 502 disposed on the fairing shell 501. Through the synergistic effect of the obstruction and reflection of the fairing shell 501 and the absorption and attenuation of the sound-absorbing layer 502, the interference of the UAV 1's own noise on the voice recording is effectively reduced, the acoustic environment of the sound output area of ​​the speaker module 7 is improved, and the clarity of the voice recording is enhanced.

[0034] In some embodiments of this application, the airflow guide shell 501 constitutes the main structure of the airflow guide 5, and its shape can be umbrella-shaped, shallow cone-shaped, arc-shaped, or multi-faceted. The airflow guide shell 501 is used to connect with the UAV 1. When the directional loudspeaker device is installed on the UAV 1, the airflow guide shell 501 is located on the upper part of the directional loudspeaker device.

[0035] A sound-absorbing layer 502 is disposed on the airflow guide shell 501 to absorb noise from the direction of the UAV 1, especially high-frequency aerodynamic noise generated by the high-speed rotation of the rotor. Specifically, the sound-absorbing layer 502 can be disposed on the inner surface of the airflow guide shell 501, that is, the surface of the airflow guide shell 501 facing the concave cavity; the sound-absorbing layer 502 can also be disposed inside the airflow guide shell 501, for example, embedded in the interlayer of the airflow guide shell 501. The placement position and coverage area of ​​the sound-absorbing layer 502 on the airflow guide shell 501 can be adjusted according to actual needs. For example, the sound-absorbing layer 502 can cover the entire inner surface of the airflow guide shell 501, or it can only cover part of the inner surface. The thickness and material of the sound-absorbing layer 502 can also be selected according to the noise frequency characteristics. The sound-absorbing layer 502 can be made of sound-absorbing cotton, microporous sound-absorbing material, polyurethane foam, EVA sound-absorbing material, or other lightweight sound-absorbing materials.

[0036] In some embodiments of this application, the sound-absorbing layer 502 is disposed on the inner surface of the flow guide shell 501 or inside the flow guide shell 501.

[0037] In this embodiment, when the sound-absorbing layer 502 is disposed on the inner surface of the flow-guiding shell 501, the sound-absorbing layer 502 directly faces the sound output area of ​​the speaker module 7, and can efficiently absorb residual noise that propagates in the concave cavity after being reflected by the flow-guiding shell 501, reducing multiple reflections and superpositions of noise in the cavity. Figure 2 As shown, when the sound-absorbing layer 502 is disposed inside the flow guide shell 501, the sound-absorbing layer 502 is embedded in the interlayer of the flow guide shell 501, forming an integral structure with the flow guide shell 501. While ensuring the sound absorption effect, the structure of the flow guide shroud 5 is more compact, and the sound-absorbing layer 502 is protected by the flow guide shell 501 and is not easy to fall off or be damaged.

[0038] In some embodiments of this application, the sound-absorbing layer 502 is disposed on the inner surface of the flow guide shell 501, that is, the surface of the flow guide shell 501 facing the concave cavity. The sound-absorbing layer 502 can be fixed to the inner surface of the flow guide shell 501 by means of pasting, embedding, or snap-fitting, directly facing the sound output area of ​​the speaker module 7, and efficiently absorbing residual noise propagating in the concave cavity after being reflected by the flow guide shell 501. The sound-absorbing layer 502 can also be disposed inside the flow guide shell 501, that is, embedded in the interlayer of the flow guide shell 501. The flow guide shell 501 can be configured as a double-layer structure, with the sound-absorbing layer 502 filling the interlayer space between the two layers to form an integrated structure, ensuring the sound absorption effect while making the structure of the flow guide 5 more compact, and the sound-absorbing layer 502 is protected by the flow guide shell 501 and is not easily detached or damaged.

[0039] In some embodiments of this application, the apparatus further includes: The first vibration damping connection mechanism is used to connect the UAV 1 and the fairing 5, and is used to attenuate the vibration from the UAV 1.

[0040] In this embodiment, by setting a first vibration damping connection mechanism between the UAV 1 and the fairing 5, the vibration generated by the UAV 1 is attenuated by the first vibration damping connection mechanism during its downward transmission. The first vibration damping connection mechanism absorbs part of the vibration energy from the UAV 1 through its own elastic deformation, thereby reducing the vibration amplitude transmitted to the fairing 5, reducing the structural noise and resonance risk caused by forced vibration of the fairing 5, and providing a more stable working environment for the fairing 5 and the speaker module 7 connected below it, which is beneficial to ensuring the clarity and stability of the voice broadcast.

[0041] In some embodiments of this application, the first vibration damping connection mechanism may include a plurality of vibration damping rubber screws 4, which are arranged circumferentially or at intervals along the bottom cover wall towards the side of the UAV 1, forming a distributed elastic support structure. Figure 4As shown, each vibration-damping rubber screw 4 includes a threaded rod 404, a rubber damping body 403, a metal washer 402, and a locking nut 401. The threaded rod 404 passes through the corresponding mounting holes on the base plate 101 of the UAV 1 and the fairing 5, and is locked by the locking nut 401 to connect the base plate 101 of the UAV 1 to the fairing 5. The rubber damping body 403 is located in the middle of the threaded rod 404. When the vibration generated by the UAV 1 is transmitted downward through the base plate 101 of the UAV 1, the rubber damping body 403 absorbs the vibration energy through its own elastic deformation, thereby attenuating the vibration amplitude transmitted to the fairing 5 and reducing the risk of structural sound transmission and shell resonance. The metal washer 402 is located between the locking nut 401 and the rubber damping body 403 to disperse the clamping force of the locking nut 401 and avoid excessive local stress.

[0042] The specific form of the first vibration damping connection mechanism is not limited to the aforementioned vibration damping rubber screw 4. For example, the first vibration damping connection mechanism can also adopt a rubber vibration damping column, a silicone vibration damping column, a spring damping component, or a composite vibration damping component formed by a combination of spring and rubber, as long as it can form an elastic vibration isolation connection between the UAV 1 and the fairing 5.

[0043] In some embodiments of this application, the apparatus further includes: The second vibration damping connection mechanism is connected between the fairing 5 and the speaker module 7 to attenuate vibrations from the UAV 1.

[0044] In this embodiment, by providing a second vibration damping connection mechanism between the fairing 5 and the speaker module 7, the residual vibration attenuated by the first vibration damping connection mechanism is further attenuated by the second vibration damping connection mechanism as it continues to be transmitted downwards. The second vibration damping connection mechanism further absorbs vibration energy through its own elastic deformation, reducing the vibration amplitude transmitted to the speaker module 7, and reducing the structural noise and eccentric vibration of the voice coil 906 caused by forced vibration of the speaker module 7, thereby ensuring the stability and speech clarity of the speaker module 7 during flight.

[0045] In some embodiments of this application, a second vibration damping connection mechanism is connected between the fairing 5 and the speaker module 7 to attenuate vibrations from the UAV 1. Specifically, the second vibration damping connection mechanism is disposed below the fairing 5, with one end connected to the fairing 5 and the other end connected to the speaker module 7, allowing the speaker module 7 to be elastically suspended below the fairing 5 via the second vibration damping connection mechanism. When residual vibrations attenuated by the first vibration damping connection mechanism are transmitted downwards through the fairing 5, the second vibration damping connection mechanism further attenuates these residual vibrations, thereby further reducing the vibration energy transmitted to the speaker module 7.

[0046] The second vibration damping connection mechanism may include multiple vibration damping rubber screws 4, which are arranged circumferentially or edge-spaced along the bottom cover wall towards the speaker module 7, forming a distributed elastic support structure. Figure 4 As shown, each damping rubber screw 4 includes a threaded rod 404, a rubber damping body 403, a metal washer 402, and a locking nut 401. The threaded rod 404 passes through corresponding mounting holes on the housing of the diffuser 5 and the speaker module 7, and is locked by the locking nut 401 to achieve the connection between the diffuser 5 and the speaker module 7. The rubber damping body 403 is located in the middle of the threaded rod 404. When residual vibration is transmitted downward through the diffuser 5, the rubber damping body 403 absorbs vibration energy through its own elastic deformation, thereby attenuating the vibration amplitude transmitted to the speaker module 7. The metal washer 402 is located between the locking nut 401 and the rubber damping body 403 to distribute the clamping force of the locking nut 401 and avoid excessive local stress on the mounting surface.

[0047] The specific form of the second vibration damping connection mechanism is not limited to the aforementioned vibration damping rubber screw 4. For example, the second vibration damping connection mechanism can also be a rubber vibration damping column, a silicone vibration damping column, a spring damping component, or a composite vibration damping component formed by a combination of spring and rubber, as long as it can form an elastic vibration isolation connection between the air guide 5 and the speaker module 7.

[0048] In some embodiments of this application, such as Figure 2 As shown, the device also includes: Orientation adjustment mechanism 10 is connected between the fairing 5 and the speaker module 7. Orientation adjustment mechanism 10 is used to adjust the orientation of speaker module 7.

[0049] In this embodiment, by setting an orientation adjustment mechanism 10 between the fairing 5 and the speaker module 7, the speaker module 7 can rotate horizontally relative to the fairing 5, thereby independently adjusting the broadcast direction without changing the flight attitude of the UAV 1. When the UAV 1 is hovering, obstacle avoidance, or inspection flight, the broadcast direction can be changed without frequently adjusting the orientation of the UAV 1, avoiding adverse effects on flight stability and the continuity of inspection tasks caused by adjusting the body attitude. At the same time, the orientation adjustment mechanism 10 allows the broadcast direction to be flexibly adjusted according to the location of ground personnel, inspection route, or on-site needs, making the voice more concentrated in the target area, improving the target directionality and task adaptability of the broadcast.

[0050] In some embodiments of this application, the orientation adjustment mechanism 10 is connected between the second vibration damping connection mechanism and the speaker module 7, and is used to adjust the orientation of the speaker module 7. Specifically, the orientation adjustment mechanism 10 is disposed below the second vibration damping connection mechanism, so that the speaker module 7 can be rotated in the horizontal direction through the orientation adjustment mechanism 10, thereby independently adjusting the direction of the broadcast without changing the flight attitude of the UAV 1.

[0051] For example, the orientation adjustment mechanism 10 can adopt a turntable-type horizontal rotating connector. The upper end of the turntable-type horizontal rotating connector is fixedly connected to the second vibration damping connector, and the lower end is fixedly connected to the speaker module 7. The speaker module 7 can rotate synchronously with the lower part of the turntable-type horizontal rotating connector to the desired direction in the horizontal direction, and remain in the current position after the rotational external force is released.

[0052] The specific form of the orientation adjustment mechanism 10 is not limited to the examples above. For example, the orientation adjustment mechanism 10 may also adopt a sliding bearing type rotating seat, a ball bearing turntable structure, a damping rotating shaft 1002 structure, or a gear plate positioning type rotating seat, as long as it can enable the speaker module 7 to adjust its orientation in the horizontal direction.

[0053] In some embodiments of this application, such as Figure 3 As shown, the orientation adjustment mechanism 10 includes: Fixed plate 1001, fixed plate 1001 is fixedly connected to the flow guide shroud 5; Rotary disk 1005, the rotary disk 1005 is fixedly connected to speaker module 7; A rotating shaft 1002 is fixedly connected to a fixed disk 1001 at one end, and a rotating disk 1005 is rotatably sleeved on the other end of the rotating shaft 1002. A damping retainer is disposed between the fixed disk 1001 and the rotating disk 1005.

[0054] In this embodiment, the fixed disk 1001 is fixedly connected to the fairing 5, and the rotating disk 1005 is fixedly connected to the speaker module 7. When the operator applies a rotational force to the speaker module 7, the rotating disk 1005 drives the speaker module 7 to rotate synchronously around the rotating shaft 1002 to the desired broadcast direction. After the external force is released, the damping retainer generates frictional damping between the fixed disk 1001 and the rotating disk 1005, enabling the rotating disk 1005 to overcome flight vibration interference and stably maintain its current position. The orientation adjustment mechanism 10 can achieve manual stepless adjustment and reliable maintenance of the broadcast direction without relying on active drive components such as motors or servos. It has a simple and compact structure, does not consume additional power, and is suitable for the lightweight mounting requirements of the UAV 1.

[0055] In some embodiments of this application, a fixed disk 1001, a rotating disk 1005, a rotating shaft 1002, a slewing bearing 1003, and a damping retainer are included. The fixed disk 1001 is fixedly connected to the lower part of the second vibration damping connection mechanism, and the rotating disk 1005 is fixedly connected to the upper part of the speaker module 7. One end of the rotating shaft 1002 is fixedly connected to the fixed disk 1001, and the rotating disk 1005 is rotatably fitted onto the other end of the rotating shaft 1002, allowing the rotating disk 1005 to rotate horizontally relative to the fixed disk 1001 around the rotating shaft 1002. The slewing bearing 1003 is disposed between the fixed disk 1001 and the rotating disk 1005 to reduce rotational friction, enabling the rotating disk 1005 to rotate smoothly relative to the fixed disk 1001 around the rotating shaft 1002. The damping retainer is disposed between the fixed disk 1001 and the rotating disk 1005 to provide frictional damping, allowing the rotating disk 1005 to remain in its current position by damping force after the external force is released.

[0056] The damping retainer may include a damping friction plate 1004 and an elastic compression plate 1006. The damping friction plate 1004 is disposed between the fixed disk 1001 and the rotating disk 1005, and the elastic compression plate 1006 is sleeved on the outside of the rotating shaft 1002 and located below the rotating disk 1005, for applying an axial clamping force to the rotating disk 1005 and the damping friction plate 1004, so that the rotating disk 1005 is always subjected to a stable frictional damping effect during rotation.

[0057] There are various ways to fix the rotating shaft 1002 to the fixed disk 1001. For example, one end of the rotating shaft 1002 can be connected to the fixed disk 1001 by thread, welding, or integral molding. The specific structure of the damping retainer is not limited to the combination of the damping friction plate 1004 and the elastic compression plate 1006 described above. As long as it can provide frictional damping between the fixed disk 1001 and the rotating disk 1005 so that the rotating disk 1005 remains in the current position after the external force is released, it is acceptable.

[0058] In some embodiments of this application, a connecting plate 9 is disposed between the second vibration damping connecting mechanism and the orientation adjustment mechanism 10. The upper end of the connecting plate 9 is connected to the second vibration damping connecting mechanism, and the lower end of the connecting plate 9 is connected to the fixing plate 1001 of the orientation adjustment mechanism 10. The connecting plate 9 can be a plate-shaped structure, and its material can be metal or composite material. The connecting plate 9 can be integrally formed with the fixing plate 1001 of the orientation adjustment mechanism 10, or it can be fixedly connected to the fixing plate 1001 as an independent component by means of screws or other methods. It should be noted that the specific shape and size of the connecting plate 9 can be selected according to the arrangement of the second vibration damping connecting mechanism and the interface form of the orientation adjustment mechanism 10.

[0059] In some embodiments of this application, the device further includes a quick-release magnetic assembly 3, such as... Figure 2 As shown, the quick-release magnetic assembly 3 includes: Clip 304, clip 304 is installed on the fairing 5; The card holder is installed on the drone 1. The card holder is provided with a card slot 301, which is used to engage with the buckle 304. The first magnetic suction element 302 is disposed in the card holder; The second magnetic component 305 is disposed inside the buckle 304, and the first magnetic component 302 and the second magnetic component 305 are used to attract each other.

[0060] In this embodiment, by setting a buckle 304 on the fairing 5 and a mounting base on the drone 1, and by setting a first magnetic 302 and a second magnetic 305 in the mounting base and buckle 304 respectively, rapid assembly and disassembly of the directional loudspeaker device and the drone 1 is achieved. During installation, the first magnetic 302 in the mounting base and the second magnetic 305 in the buckle 304 attract each other, allowing the buckle 304 to quickly align and position itself above the mounting base, completing the initial positioning without repeated alignment. Subsequently, the buckle 304 snaps into the slot 301 on the mounting base, forming a mechanical anti-detachment connection, ensuring that the device will not loosen due to vibration or airflow impact during the flight of the drone 1. During disassembly, the device can be quickly removed by releasing the buckle 304 from the slot 301, making the operation simple. By combining magnetic positioning with mechanical snap-fit, the convenience of installation and disassembly is improved, while the stability and reliability of the flight mount are ensured, facilitating rapid replacement and maintenance in different inspection tasks.

[0061] In some embodiments of this application, the buckle 304 is mounted above the first vibration damping connection mechanism, and the mounting base is mounted on the base plate 101 of the UAV 1. The mounting base has a slot 301 for engaging with the buckle 304 to form a mechanical anti-detachment connection. A first magnetic attractor 302 is disposed within the mounting base, and a second magnetic attractor 305 is disposed within the buckle 304. The first magnetic attractor 302 and the second magnetic attractor 305 can be circular magnets 901.

[0062] During installation, the buckle 304 above the first vibration damping connection mechanism is brought close to the mounting base on the base plate 101 of the drone 1. The first magnetic component 302 inside the mounting base and the second magnetic component 305 inside the buckle 304 attract each other, allowing the buckle 304 to quickly align and position itself above the mounting base, completing the initial magnetic positioning. Then, the buckle 304 is inserted into the slot 301 of the mounting base. The slot 301 and the buckle 304 cooperate to form a mechanical limit and anti-detachment connection, ensuring that the device will not loosen due to vibration or airflow impact during the flight of the drone 1. For disassembly, simply release the buckle 304 from the slot 301 to quickly remove the device along with the first vibration damping connection mechanism and the components below it; the operation is simple.

[0063] The specific types of the first magnetic attractor 302 and the second magnetic attractor 305 are not limited to the disc magnet 901; other forms of permanent magnets or electromagnets 901 can also be used. The specific structural forms of the buckle 304 and the slot 301 can also vary. For example, the buckle 304 can be an elastic hook, a claw, or a block, and the slot 301 can be a groove, a hole, or a notch that matches the shape of the buckle 304.

[0064] In some embodiments of this application, such as Figure 2 As shown, a first plastic shell 303 is provided inside the card holder, and a first magnetic element 302 is embedded inside the first plastic shell 303; a second plastic shell 306 is provided inside the buckle 304, and a second magnetic element 305 is embedded inside the second plastic shell 306. The first plastic shell 303 and the second plastic shell 306 are used to fix and protect the circular magnet 901 inside them, respectively. During installation, the second plastic shell 306 on the buckle 304 moves closer to the card holder as the buckle 304 moves closer to the card holder, and the circular magnet 901 inside the second plastic shell 306 attracts each other with the circular magnet 901 inside the first plastic shell 303 on the card holder, achieving initial magnetic positioning.

[0065] In some embodiments of this application, the directional announcement device further includes a connector 8. The connector 8 is disposed between the latch 304 and the first vibration-damping connection mechanism. The upper end of the connector 8 is connected to the quick-release magnetic assembly 3, and the lower end of the connector 8 is connected to the first vibration-damping connection mechanism. The connector 8 can be a plate-like, block-like, or frame-like structure, and its material can be metal or composite material. The specific shape and size of the connector 8 can be selected according to the interface form of the base plate 101 of the UAV 1 and the arrangement of the first vibration-damping connection mechanism.

[0066] In some embodiments of this application, such as Figure 2 As shown, the speaker module 7 has a honeycomb rectifier mesh 909 at its sound output end.

[0067] In this embodiment, by setting a honeycomb rectifier mesh 909 at the sound output end of the speaker module 7, the voice sound waves emitted by the speaker module 7 flow through multiple regular channels of the honeycomb rectifier mesh 909 when they propagate outward through the sound output end. The airflow near the sound output is rectified into a more stable flow state, thereby reducing the disturbance of the downwash airflow and crosswinds of the UAV 1 on the sound field of the sound output, making the direction of voice propagation more focused and stable, and improving the clarity of the UAV 1's shouts in flight.

[0068] In some embodiments of this application, the honeycomb rectifier mesh 909 consists of multiple regular channels, the axes of which are substantially parallel to the sound output direction of the speaker module 7. During the flight of the UAV 1, when the downwash and ambient crosswinds pass through the sound output end of the speaker module 7, the regular channels of the honeycomb rectifier mesh 909 rectify the turbulent airflow, making the airflow near the sound outlet more stable, thereby reducing the disturbance of the airflow to the sound field and making the speech propagation direction more focused and stable. Furthermore, the honeycomb rectifier mesh 909 also provides inner support for the waterproof acoustic membrane 9010. When the waterproof acoustic membrane 9010 is impacted by external airflow, the honeycomb rectifier mesh 909 provides structural support on its inner side, preventing excessive deformation of the waterproof acoustic membrane 9010 under airflow impact, which would affect the sound wave transmission effect. The honeycomb rectifier mesh 909 can be made of metal, plastic, or composite materials. The cross-sectional shape of the regular channels can be circular, hexagonal, square, or other polygonal. The aperture and depth of the channels can be selected according to actual needs.

[0069] In some embodiments of this application, such as Figure 2 As shown, the speaker module 7 has a waterproof and sound-permeable membrane 9010 at its sound output end.

[0070] In this embodiment, by providing a waterproof and sound-permeable membrane 9010 at the sound-emitting end of the speaker module 7, rainwater, dust, fog, and mud splashes from the external environment are blocked from entering the speaker module 7 and corroding precision components such as the voice coil 906 and diaphragm 907. Simultaneously, the waterproof and sound-permeable membrane 9010 allows voice waves to pass through smoothly without affecting the normal propagation of the announcement. Therefore, the reliability and service life of this device are significantly improved in harsh environments such as construction sites and outdoor rain, fog, and dust, ensuring the stable operation of the directional announcement function under various weather conditions.

[0071] In some embodiments of this application, the waterproof and sound-permeable membrane 9010 is disposed on the outer side of the honeycomb rectifier mesh 909, i.e., the side closest to the external environment. The waterproof and sound-permeable membrane 9010 serves to prevent external rainwater, dust, mist, and mud splashes from entering the speaker module 7, avoiding damage to precision components such as the voice coil 906 and diaphragm 907 due to water ingress or dust accumulation. Simultaneously, the waterproof and sound-permeable membrane 9010 allows voice sound waves to pass through smoothly without affecting the normal propagation of spoken words. Through the structural support provided by the honeycomb rectifier mesh 909 on the inner side of the waterproof and sound-permeable membrane 9010, the membrane 9010 is less prone to excessive deformation when impacted by downwash airflow, ensuring the stability of sound transmission and the reliability of use. The waterproof and sound-permeable membrane 9010 can be made of expanded polytetrafluoroethylene (ePTFE) membrane, microporous polymer membrane, or other thin film materials with waterproof and sound-permeable functions. The waterproof and sound-permeable membrane 9010 can be fixed to the sound output end of the speaker module 7 in various ways, such as by pressure ring pressing, adhesive bonding, or thermoforming welding.

[0072] In some embodiments of this application, such as Figure 2 As shown, the directional loudspeaker device also includes a control and power amplifier module 6. The control and power amplifier module 6 receives voice signals and drives the speaker module 7 to produce sound. The control and power amplifier module 6 is electrically connected to the speaker module 7 and internally houses an audio processing circuit and a power amplifier circuit. The control and power amplifier module 6 receives voice signals transmitted from the ground control terminal or the UAV 1 communication system. After processing by the audio processing circuit, the power amplifier circuit amplifies the signal to the driving power required by the speaker module 7 before outputting it to the speaker module 7. The control and power amplifier module 6 can be integrated inside the speaker module 7's housing or fixed externally as a separate module. It should be noted that the specific circuit structure and installation position of the control and power amplifier module 6 can be adjusted according to actual needs.

[0073] In some embodiments of this application, such as Figure 2 As shown, the loudspeaker module 7 includes a magnet 901, a magnetic plate 902, a T-shaped magnetic post 905, a voice coil 906, a diaphragm 907, and a retaining edge 908. The magnet 901, magnetic plate 902, and T-shaped magnetic post 905 together form a magnetic circuit structure, creating a stable magnetic field in the gap between the T-shaped magnetic post 905 and the magnetic plate 902. The voice coil 906 is disposed within this magnetic gap, and the diaphragm 907 is connected to the voice coil 906. The retaining edge 908 is disposed around the periphery of the diaphragm 907, supporting the diaphragm 907 and limiting its range of motion. When the loudspeaker module 7 receives an audio electrical signal from the control and power amplifier module 6, the voice coil 906 moves under the influence of electromagnetic force in the magnetic field, causing the diaphragm 907 to vibrate, thereby converting the electrical signal into speech waves. The speech waves generated by the vibration of the diaphragm 907 propagate outward from the output end of the loudspeaker module 7, playing speech to the target area on the ground.

[0074] The housing of speaker module 7 can be made of ABS or other lightweight materials to reduce overall weight and meet the lightweight payload requirements of UAV 1. The sound output end of speaker module 7 faces the ground target area, so that the voice sound waves mainly propagate in the direction of the ground. The specific type of speaker module 7 is not limited to the aforementioned moving coil speaker; other types of electroacoustic transducers, such as piezoelectric speakers or electromagnetic speakers, can also be used. The power and size of speaker module 7 can be selected according to the payload capacity and broadcasting distance requirements of UAV 1.

[0075] In some embodiments of this application, such as Figure 2As shown, the speaker module 7 has a downward directional channel 903 at its output end. The downward directional channel 903 is used to propagate the voice waves generated by the speaker module 7 towards the target area on the ground in a predetermined direction. The output end of the downward directional channel 903 is tilted towards the target area on the ground, causing the voice waves to mainly propagate in the direction of the ground, reducing the diffusion of sound towards the direction of the UAV 1 or non-target areas. By setting the downward directional channel 903, the directionality of voice propagation is improved, enabling ground personnel to receive the broadcast content more clearly.

[0076] The downward directional sound channel 903 can be integrally formed with the sound outlet of the speaker module 7, or it can be installed as a separate component at the sound outlet of the speaker module 7. The honeycomb rectifier mesh 909 and the waterproof and sound-permeable membrane 9010 are disposed at the outlet end of the downward directional sound channel 903. It should be noted that the specific shape and tilt angle of the downward directional sound channel 903 can be adjusted according to actual needs. For example, the channel can be a straight tube, a conical tube, or a curved tube, and the tilt angle of the outlet end can be optimized according to the typical flight altitude and broadcasting distance of the UAV 1.

[0077] In some embodiments of this application, such as Figure 2 As shown, the speaker module 7 has a dust cover 904 at its output end. The dust cover 904 is located on the outermost side of the output end or on the outer side of the honeycomb rectifier mesh 909. It is used to prevent dust and debris from the external environment from entering the speaker module 7, thus preventing dust accumulation on precision components such as the voice coil 906 and diaphragm 907 from affecting their sound performance. The dust cover 904 can be made of metal mesh, fiber mesh, or microporous board, and has multiple sound-permeable holes to allow voice waves to pass through smoothly.

[0078] The specific structure and installation position of the dust cover 904 can be adjusted according to actual needs. For example, the dust cover 904 can be integrated with the honeycomb rectifier mesh 909, or it can be installed as an independent component. When a waterproof and sound-permeable membrane 9010 is provided, the dust cover 904 can be set on the outside or inside of the waterproof and sound-permeable membrane 9010.

[0079] In addition, this application provides a drone 1, which includes the directional loudspeaker device as described above.

[0080] The drone 1 provided in this application embodiment can realize all the processes implemented in the above-described directional shouting device embodiment and achieve the same beneficial effects. To avoid repetition, it will not be described again here.

[0081] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. A directional loudspeaker device, characterized in that, For installation on a drone, the device includes: A fairing for connection with the UAV, the fairing having a concave cavity formed by the concave cavity gradually expanding from the bottom wall of the fairing toward the opening wall of the fairing; A speaker module connected to the bottom cover wall, and the concave cavity housing at least a portion of the speaker module, wherein: When the directional shouting device is installed on the drone, the bottom cover is connected to the drone, and the drone is located on the side of the flow guide away from the concave cavity. The flow guide is used to guide the downwash airflow of the drone to be diverted along the outer surface of the flow guide.

2. The directional loudspeaker device according to claim 1, characterized in that, The flow deflector includes: A flow-guiding shell, the flow-guiding shell being used for connection with the drone; A sound-absorbing layer is disposed on the airflow guide shell and is used to absorb noise from the UAV.

3. The directional loudspeaker device according to claim 2, characterized in that: The sound-absorbing layer is disposed on the surface of the flow-guiding shell; and / or, the sound-absorbing layer is embedded inside the flow-guiding shell.

4. The directional loudspeaker device according to claim 1, characterized in that, The device further includes: A first vibration damping connection mechanism is used to connect the UAV and the fairing, and the first vibration damping connection mechanism is used to attenuate vibrations from the UAV.

5. The directional loudspeaker device according to claim 1, characterized in that, The device further includes: The second vibration damping connection mechanism is connected between the fairing and the speaker module to attenuate vibrations from the drone.

6. The directional loudspeaker device according to claim 1, characterized in that, The device further includes: A directional adjustment mechanism is connected between the fairing and the speaker module, and the directional adjustment mechanism is used to adjust the orientation of the speaker module.

7. The directional loudspeaker device according to claim 6, characterized in that, The orientation adjustment mechanism includes: A fixed plate is fixedly connected to the flow guide cover; A rotating disk, which is fixedly connected to the speaker module; A rotating shaft, one end of which is fixedly connected to the fixed disk, and the rotating disk is rotatably sleeved on the other end of the rotating shaft; A damping retainer is disposed between the fixed disk and the rotating disk.

8. The directional loudspeaker device according to claim 1, characterized in that, The device further includes: A snap fastener is mounted on the air deflector. A mounting bracket is installed on the drone, and the mounting bracket is provided with a slot for engaging with the buckle; A first magnetic suction element is disposed within the card holder; The second magnetic component is disposed within the buckle, and the first magnetic component and the second magnetic component are used to attract each other.

9. The directional loudspeaker device according to claim 1, characterized in that, The speaker module is equipped with a honeycomb rectifier mesh at its sound output end.

10. The directional loudspeaker device according to claim 1, characterized in that, The speaker module is equipped with a waterproof and sound-permeable membrane at its sound output end.

11. A drone, characterized in that, Includes the directional loudspeaker device as described in any one of claims 1 to 10.

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