An ultra-lightweight, high-decibel directional horn suitable for drones

Abstract

This utility model relates to an ultra-lightweight, high-decibel directional speaker suitable for drones, comprising a sound-amplifying cover, a fixed rear seat, a connecting bracket, a power amplifier module, and a sound-generating component. One end of the sound-amplifying cover is tapered, and the fixed rear seat is fixed to the end of the sound-amplifying cover. The sound-generating component is housed within the fixed rear seat. A reflector is fixed inside the sound-amplifying cover, facing the sound-generating component and having gaps between it and the inner wall and end of the sound-amplifying cover. At least one side of the sound-amplifying cover has a mounting groove, and the power amplifier module is fixed within the mounting groove and connected to the sound-generating component. The fixed rear seat also has a connecting bracket fixed to it. This utility model overcomes the technical barriers of incompatibility between lightweight design, high decibel levels, and strong directionality, providing an efficient and reliable audio solution for special operation scenarios of drones.

Description

Technical Field

[0001] This utility model relates to the field of sound diffusion device structure technology, and in particular to an ultra-lightweight high-decibel directional speaker suitable for drones. Background Technology

[0002] With the rapid development of drone technology, its applications in emergency rescue, security patrol, and agricultural broadcasting are becoming increasingly widespread. In these scenarios, drones often need to be equipped with amplification equipment to achieve remote directional audio transmission, such as emergency warnings, command transmission, or alert broadcasts. However, traditional drone amplification equipment faces the following technical bottlenecks:

[0003] The contradiction between weight and size: Drones are extremely sensitive to payload weight. Conventional speakers often use metal materials or complex cavity structures to increase sound pressure, resulting in bulky equipment that severely restricts the drone's endurance and maneuverability.

[0004] Insufficient acoustic efficiency: Ordinary loudspeakers have a large sound wave diffusion angle, poor directionality, and easily dispersed energy, making it difficult to maintain high definition and effective coverage in long-distance scenarios;

[0005] Poor integration and adaptability: The separate design of the power amplifier module and the sound unit increases the additional counterweight and assembly complexity, and the traditional bracket structure is difficult to adapt to the mounting requirements of multiple drone models, with limited installation stability and angle adjustment capability. Utility Model Content

[0006] To address the aforementioned technical problems, the purpose of this invention is to provide an ultra-lightweight, high-decibel directional loudspeaker suitable for drones. This loudspeaker has a compact structure, is easy to install, and can guarantee high sound pressure output.

[0007] To achieve the above-mentioned objectives, this utility model adopts the following technical solution:

[0008] An ultra-lightweight high-decibel directional loudspeaker suitable for drones includes a sound-amplifying cover, a fixed rear seat, a connecting bracket, a power amplifier module, and a sound-generating component. One end of the sound-amplifying cover is tapered, the fixed rear seat is fixed to the end of the sound-amplifying cover, the sound-generating component is inside the fixed rear seat, a reflector is fixed inside the sound-amplifying cover, the reflector faces the sound-generating component, and gaps are left between the reflector and the inner wall and end of the sound-amplifying cover. At least one side of the sound-amplifying cover is also provided with a mounting groove, the power amplifier module is fixed in the mounting groove and connected to the sound-generating component, and a connecting bracket is also fixed on the fixed rear seat.

[0009] As a preferred embodiment, the reflector is a hollow cylinder with an opening at one end facing the sound-generating component and a closed arc surface at the other end.

[0010] As a preferred embodiment, the loudspeaker cover has a rectangular cross-section and rounded corners at all four corners, and the loudspeaker cover is made of honeycomb sandwich carbon fiber composite material.

[0011] As a preferred embodiment, the connecting bracket is L-shaped, with screw holes on one side plate and two parallel elongated adjustment holes on the other side plate.

[0012] As a preferred embodiment, the outer wall of the reflector is uniformly provided with multiple connecting ribs, which are fixed to the inner wall of the speaker enclosure.

[0013] As a preferred embodiment, the sound-generating component includes a neodymium iron boron annular magnet and a voice coil. The mounting base is provided with a groove, the neodymium iron boron annular magnet is fixed in the groove, and the voice coil is located at the opening of the groove.

[0014] As a preferred embodiment, the length of the reflector is less than the length of the loudspeaker cover.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This invention utilizes a collaborative design of a loudspeaker and a reflector to create a directional sound wave enhancement channel through the gap between the reflector and the inner wall of the loudspeaker, significantly improving sound pressure level and directivity. Simultaneously, the power amplifier module is embedded in the mounting slot on the side wall of the loudspeaker, achieving a highly integrated layout and avoiding additional cables and weights. Combined with the bidirectional adjustment structure of the L-shaped connecting bracket, it further solves the challenges of drone mounting compatibility and acoustic axis calibration. This design overcomes the technical barriers of the incompatibility between lightweight design, high decibel levels, and strong directivity, providing an efficient and reliable audio solution for special drone operation scenarios. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute a limitation thereof.

[0018] Figure 1 and Figure 2 These are schematic diagrams of the overall structure of this utility model from two different angles;

[0019] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0020] Figure 4 and Figure 5 These are two different exploded structural diagrams of this utility model.

[0021] The attached figures are labeled as follows: 1. Loudspeaker cover; 11. Mounting slot; 12. Reflector; 13. Connecting stiffener; 14. Sound-generating component; 141. Neodymium iron boron ring magnet; 142. Voice coil; 2. Fixed back seat; 3. Connecting bracket; 31. Long strip-shaped adjustment hole. Detailed Implementation

[0022] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0023] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0024] Furthermore, in the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0029] like Figures 1 to 5 As shown, an ultra-lightweight high-decibel directional speaker suitable for drones includes a speaker enclosure 1, a fixed rear seat 2, a connecting bracket 3, a power amplifier module, and a sound-generating component 14. The speaker enclosure 1 has a rectangular cross-section with rounded corners at all four corners. The speaker enclosure 1 is made of honeycomb sandwich carbon fiber composite material. The rectangular cross-section and rounded corners of the speaker enclosure reduce wind resistance during flight and avoid turbulent noise caused by sharp edges, making it suitable for the high-speed movement environment of drones. Simultaneously, the honeycomb sandwich carbon fiber composite material also features low density (approximately 1.6 g / cm³). 3 With high specific stiffness, it reduces weight by more than 50% compared to traditional metal materials, extending the flight time of drones.

[0030] One end of the loudspeaker cover 1 is tapered, and the fixed back seat 2 is fixed to the end of the loudspeaker cover 1. The sound-generating component 14 is inside the fixed back seat 2. A reflector 12 is fixed inside the loudspeaker cover 1, and the reflector 12 faces the sound-generating component 14, with gaps between it and the inner wall and end of the loudspeaker cover 1. The length of the reflector 12 is less than the length of the loudspeaker cover 1. At least one side of the loudspeaker cover 1 is also provided with a mounting groove 11, and the power amplifier module is fixed in the mounting groove 11 and connected to the sound-generating component 14. A connecting bracket 3 is also fixed on the fixed back seat 2.

[0031] The aforementioned structure, through the amplification dome's tapered design combined with the gap between the reflector and the inner wall, forms a sound wave guiding channel, reducing sound energy diffusion and achieving a highly directional sound field, suitable for long-distance directional communication by drones (such as search and rescue warnings). Simultaneously, the reflector and amplification dome are fixed non-contactly (through a gap), reducing resonance transmission. Combined with honeycomb carbon fiber material, this achieves a high-strength, lightweight structure, adapting to drone payload limitations. Furthermore, the power amplifier module is embedded in the mounting slot on the side of the amplification dome, shortening the circuit path, reducing signal loss, and avoiding the bulk redundancy of an external power amplifier, thus improving overall compactness.

[0032] The reflector 1 is generally hollow cylindrical, with an opening at one end facing the sound-generating component 14 and a closed arc surface at the other end. The open end of the hollow cylindrical reflector receives sound waves from the sound-generating component, while the closed arc surface forms an acoustic reflecting surface, reflecting the sound waves and concentrating them along the axial direction of the amplifier to increase the sound pressure level (SPL) in a specific direction. At the same time, the smooth transition of the arc surface reduces phase cancellation during the reflection of high-frequency sound waves, reducing distortion and especially improving the clarity of mid-to-high frequency sound.

[0033] The connecting bracket 3 is L-shaped. One side plate of the connecting bracket 3 has screw holes, and the other side plate has two parallel elongated adjustment holes 31, meeting the requirements for quick assembly and disassembly and adaptability to multiple scenarios. The L-shaped bracket, combined with the double elongated adjustment holes, allows for fine-tuning of the installation position, accommodating the mounting needs of different drone models (such as quadcopters and fixed-wing drones). The use of appropriate screws for installation and fixation simplifies the installation process and reduces maintenance costs.

[0034] Multiple connecting ribs 13 are evenly arranged on the outer wall of the reflector 12, and the connecting ribs 13 are fixed to the inner wall of the speaker enclosure 1. The evenly distributed connecting ribs (such as 4-6 radial ribs) rigidly connect the reflector and the speaker enclosure, suppressing high-frequency vibration deformation and avoiding sound quality degradation caused by acoustic path deviation. At the same time, the ribs can increase the heat dissipation surface area, and with the thermal conductivity of carbon fiber (20-50W / m·K), it can assist in the heat dissipation of the power amplifier module and improve the system reliability.

[0035] The sound-generating component 14 includes a neodymium iron boron (NdFeB) ring magnet 141 and a voice coil 142. The mounting base 2 has a groove, in which the NdFeB ring magnet 141 is fixed, and the voice coil 142 is located at the opening of the groove. The magnet is embedded in the groove of the mounting base, and the voice coil is close to the opening of the reflector, shortening the sound wave transmission path, reducing energy loss, and improving transient response. The NdFeB ring magnet (N52 grade) provides a magnetic induction intensity of over 1.4T, driving the voice coil to generate a larger amplitude, increasing the conversion efficiency by 30%-40%, and meeting high decibel requirements (≥120dB@1m).

[0036] In summary, this invention, while ensuring high sound pressure output, resolves the technical contradictions between weight, directionality, and installation compatibility through structural integration and acoustic optimization.

[0037] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A super-lightweight high-decibel directional horn suitable for use in a drone, characterized in that: The device includes a loudspeaker cover (1), a fixed back seat (2), a connecting bracket (3), a power amplifier module, and a sound-generating component (14). One end of the loudspeaker cover (1) is closed. The fixed back seat (2) is fixed to the end of the loudspeaker cover (1). The sound-generating component (14) is inside the fixed back seat (2). A reflector (12) is fixed inside the loudspeaker cover (1). The reflector (12) faces the sound-generating component (14) and has gaps between it and the inner wall and end of the loudspeaker cover (1). At least one side of the loudspeaker cover (1) is also provided with a mounting groove (11). The power amplifier module is fixed in the mounting groove (11) and connected to the sound-generating component (14). The fixed back seat (2) is also fixed with a connecting bracket (3).

2. The ultra-lightweight high-decibel directional horn suitable for UAVs according to claim 1, characterized in that, The reflector (12) is a hollow cylinder with an opening at one end facing the sound-generating component (14) and a closed arc surface at the other end.

3. The ultra-lightweight high-decibel directional horn suitable for use in drones according to claim 1, wherein, The loudspeaker cover (1) has a rectangular cross-section and rounded corners at the four corners. The loudspeaker cover (1) is made of honeycomb sandwich carbon fiber composite material.

4. The ultra-lightweight high-decibel directional horn suitable for use in drones according to claim 1, wherein, The connecting bracket (3) is L-shaped. One side plate of the connecting bracket (3) is provided with screw holes, and the other side plate is provided with two parallel elongated adjustment holes (31).

5. The ultra-lightweight high-decibel directional horn suitable for use in drones according to claim 1, wherein, Multiple connecting ribs (13) are evenly arranged on the outer wall of the reflector (12), and the connecting ribs (13) are fixed to the inner wall of the loudspeaker (1).

6. The ultra-lightweight high-decibel directional horn suitable for use in drones according to claim 1, wherein, The sound-generating component (14) includes a neodymium iron boron annular magnet (141) and a voice coil (142). The fixed back seat (2) is provided with a groove, the neodymium iron boron annular magnet (141) is fixed in the groove, and the voice coil (142) is located at the opening of the groove.

7. The ultra-lightweight high-decibel directional horn suitable for use in drones according to claim 1, wherein, The length of the reflector (12) is less than the length of the loudspeaker (1).

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