Sandwich type flat horn

Abstract

The utility model discloses a sandwich type flat horn, which comprises a sound frame and a sound film arranged at the top of the sound frame, a sound basin is arranged in the sound frame, and the sound basin is provided with a magnetic assembly and a vibration assembly for driving the sound film to produce sound; the sound film comprises a film base body, the surface of the film base body is provided with a high-molecular composite film, a metal film and a waterproof breathable film which are of a sandwich structure from inside to outside, the sound film is arranged to be a vibration film of a foaming sandwich structure, the manufacturing process of the sound film is relatively simple, multiple processes such as foam core preforming can be adopted, and the sound film can be suitable for large-scale production; the manufacturing process is relatively simple, the production efficiency is relatively high, a large number of products can be rapidly produced, the foaming sandwich structure has good energy absorption and damping characteristics, energy in the vibration process of the sound film can be more uniformly absorbed and dissipated, the duration of vibration is shortened, the sound is clearer and neater, and the damping effect is better.

Description

Technical Field

[0001] This utility model relates to the field of loudspeaker technology, and in particular to a sandwich-type flat panel loudspeaker. Background Technology

[0002] The diaphragm is a key component of a loudspeaker, primarily responsible for converting electrical signals into sound signals and radiating them. Its structure significantly impacts the loudspeaker's sound quality, frequency response, and other performance characteristics. Traditional diaphragm structures often employ single-layer or multi-layer composite structures. Multi-layer composite structures are formed by combining multiple thin films of different materials through a special process, such as coating one or more layers of special materials onto the surface of a substrate to form a composite diaphragm. This type of multi-layer composite structure has a relatively complex manufacturing process, a long production cycle, and its damping characteristics are relatively uneven and ineffective. Therefore, there is a need for a loudspeaker with a relatively simple diaphragm manufacturing process that can effectively improve sound quality. Utility Model Content

[0003] In order to overcome the shortcomings of the existing technology, the technical problem to be solved by this utility model is to propose a sandwich-type flat panel speaker, which further improves the manufacturing difficulty and sound quality of the speaker by designing the diaphragm of the speaker in a sandwich manner.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] This utility model provides a sandwich-type flat panel loudspeaker, including a speaker frame and a diaphragm disposed on the top of the speaker frame. A cone is disposed within the speaker frame, and the cone is provided with a magnetic component and a vibrating component that drives the diaphragm to produce sound. Specifically, the magnetic component includes several inner magnets disposed at the center of the voice coil and side magnets disposed around the voice coil. The inner magnets and side magnets are permanent magnets, forming an internal magnetic structure to provide a stable magnetic field for the voice coil. The vibrating component includes several voice coils, which are arranged in a matrix or sleeve arrangement within the cone. The voice coils are bonded together with the diaphragm. The voice coils are interconnected via circuitry, and the voice coils are connected to external circuitry via an FPC to ensure lossless transmission of audio signals.

[0006] To reduce the manufacturing difficulty of the diaphragm, the diaphragm includes a membrane substrate. The surface of the membrane substrate is provided with a sandwich structure of a polymer composite membrane, a metal membrane, and a waterproof and breathable membrane from the inside out. The polymer composite membrane is a TPEE membrane or a PEN membrane. The metal membrane is a stainless steel membrane or an aluminum membrane. The composite membrane, the metal membrane, and the waterproof and breathable membrane are bonded together with adhesive, which is one of UV adhesive, acrylic adhesive, water-based diaphragm adhesive, polyurethane adhesive, butyl adhesive, and cyanoacrylate adhesive.

[0007] The beneficial effects of this utility model are as follows:

[0008] This invention uses a foamed sandwich structure diaphragm, which has a relatively simple manufacturing process. It can be made using various processes such as pre-formed foam cores, making it suitable for large-scale production. The manufacturing process is relatively simple, the production efficiency is high, and a large number of products can be produced quickly. Moreover, this foamed sandwich structure has good energy absorption and damping characteristics, which can more evenly absorb and dissipate the energy during the vibration of the diaphragm, reduce the duration of vibration, make the sound cleaner and crisper, and have a better damping effect. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the overall structure of a sandwich-type flat panel speaker provided in a specific embodiment of this utility model;

[0010] Figure 2 This is a schematic diagram of the internal structure of a sandwich-type flat panel speaker with voice coils arranged in a matrix, provided in a specific embodiment of this utility model.

[0011] Figure 3 This is a schematic diagram of the cross-sectional principle of the diaphragm provided in a specific embodiment of this utility model;

[0012] Figure 4 yes Figure 3 Enlarged diagram of A in the middle;

[0013] In the picture:

[0014] 1. Sound frame; 2. Sound membrane;

[0015] 11. Cone; 12. Magnetic assembly; 13. Vibrating assembly;

[0016] 21. Membrane substrate; 211. Polymer composite membrane; 212. Metal membrane; 213. Waterproof and breathable membrane;

[0017] 121. Internal magnet; 122. Side magnet;

[0018] 131. Voice coil. Detailed Implementation

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] As shown in the figure, this utility model provides a sandwich-type flat panel loudspeaker, including a speaker frame 1 and a diaphragm 2 disposed on the top of the speaker frame 1. A cone 11 is disposed inside the speaker frame 1, and the cone 11 is provided with a magnetic component 12 and a vibrating component 13 that drives the diaphragm 2 to produce sound. Specifically, the magnetic component 12 includes several inner magnets 121 disposed at the center of a voice coil 131 and side magnets 122 disposed around the voice coil 131. The inner magnets 121 and side magnets 122 are permanent magnets, forming an internal magnetic structure to provide a stable magnetic field for the voice coil 131. The vibrating component 13 includes several voice coils 131, which are arranged in a matrix or sleeve arrangement within the cone 11. The voice coils 131 and the diaphragm 2 are bonded together. Together; several voice coils 131 are interconnected by a circuit. The voice coils 131 are connected to the external circuit through an FPC to ensure lossless transmission of audio signals. Thus, when sound is produced, the inner magnet 121 and the outer magnet 122 form an internal magnetic structure within the cone 11 to provide a stable magnetic field for the voice coils 131. When the audio signal current passes through the voice coils 131 from the FPC, the voice coils 131 drive the diaphragm 2 to vibrate, which is ultimately perceived as sound by the human ear. The design of multiple voice coils 131 can increase the relative length of the voice coils 131 in the magnetic field, making the electromagnetic force on the voice coils 131 in the magnetic field greater, and giving the diaphragm 2 a larger amplitude. This allows the flat-panel speaker to produce a larger sound in a smaller space and with limited shape.

[0021] Preferably, the diaphragm 2 includes a membrane substrate 21. The surface of the membrane substrate 21 is provided with a sandwich structure of a polymer composite membrane 211, a metal membrane 212, and a waterproof and breathable membrane 213, wherein the polymer composite membrane 211 is a TPEE membrane or a PEN membrane, and the metal membrane 212 is a stainless steel membrane or an aluminum membrane. The composite membrane, the metal membrane 212, and the waterproof and breathable membrane 213 are bonded together with adhesive, which is one of the following: UV adhesive, acrylic adhesive, water-based diaphragm adhesive, polyurethane adhesive, butyl adhesive, or cyanoacrylate adhesive. The foamed sandwich structure diaphragm, composed of a polymer composite membrane 211, a metal membrane 212, and a waterproof and breathable membrane 213, is bonded together with adhesive. Its manufacturing process is relatively simple and can be adapted to large-scale production. The manufacturing cost is relatively low and the cycle is short. Moreover, this foamed sandwich structure has good energy absorption and damping characteristics. It can absorb and dissipate the energy during the vibration of the diaphragm 2 more evenly, reduce the duration of vibration, make the sound cleaner and crisper, and have a better damping effect.

[0022] This utility model has been described through preferred embodiments. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. This utility model is not limited to the specific embodiments disclosed herein; other embodiments falling within the scope of the claims of this application are all within the protection scope of this utility model.

Claims

1. A sandwich type panel loudspeaker, characterized by: The utility model provides a kind of flat panel loudspeaker, including sound frame (1) and the sound film (2) of being arranged on the top of sound frame (1), the sound frame (1) is arranged with sound basin (11), the sound basin (11) is provided with magnetic assembly (12) and the vibration assembly (13) of the sound film (2) with the sound of being driven;The sound film (2) includes membrane matrix (21), the surface of membrane matrix (21) is provided with high polymer composite film (211) from inside to outside, metal film (212) and waterproof breathable film (213) in sandwich structure.

2. The sandwich type flat panel loudspeaker according to claim 1, wherein: The high polymer composite film (211) is a TPEE film or a PEN film.

3. The sandwich type flat panel loudspeaker according to claim 1, wherein: The metal film (212) is a stainless steel film or an aluminum film.

4. The sandwich type flat panel loudspeaker according to claim 1, wherein: The composite film, the metal film (212) and the waterproof breathable film (213) are bonded by glue, and the glue is one of UV glue, acrylic glue, water-based vibration film glue, polyurethane glue, butyl glue and cyanoacrylate glue.

5. The sandwich type flat panel loudspeaker according to claim 1, wherein: The vibration assembly (13) includes a plurality of voice coils (131), and the plurality of voice coils (131) are arranged in a matrix or a sleeve in the sound basin (11), and the voice coils (131) and the sound film (2) are bonded together.

6. The sandwich type flat panel loudspeaker according to claim 5, wherein: The magnetic assembly (12) includes a plurality of inner magnets (121) arranged at the center of the voice coils (131) and a plurality of edge magnets (122) arranged around the voice coils (131), the inner magnets (121) and the edge magnets (122) are permanent magnets, and the inner magnets (121) and the edge magnets (122) form an inner magnet structure to provide a stable magnetic field for the voice coils (131).

7. The sandwich type flat panel loudspeaker according to claim 6, wherein: The plurality of voice coils (131) are connected to each other by a circuit, and the voice coils (131) are connected to an external circuit by FPC to ensure lossless transmission of audio signals.

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