A loudspeaker dome diaphragm structure and a HIFI loudspeaker

Abstract

The utility model discloses a kind of loudspeaker dome vibrating membrane structure and HIFI loudspeaker, including central dome part and outer edge part, central dome part and outer edge part are formed diaphragm structure after being bonded by adhesive, the diaphragm of central dome part is made of single layer pure graphene material, and the edge of central dome part is pressed in the inner ring edge top or bottom of outer edge part;The utility model is by using the diaphragm structure of "central dome part and outer edge part bonding fixed", wherein the central dome part made of pure graphene material has high tensile strength and low density characteristics, compared with existing single layer membrane or composite material, can quickly respond when high-frequency vibration and is not prone to deformation, effectively improve high-frequency response speed, and the edge of central dome part is pressed in the inner ring edge top or bottom of outer edge part, and the stability of the bonding fixed structure of pressing type can ensure the stability of the connection of both, avoid energy loss or interference in vibration transmission process, further guarantee the stable output of high-frequency sound characteristic.

Description

Technical Field

[0001] This utility model relates to the field of loudspeaker technology, specifically to a loudspeaker dome diaphragm structure and a HiFi loudspeaker. Background Technology

[0002] In the field of headphones and HiFi speakers, the performance of the speaker diaphragm directly determines the high-frequency response characteristics and distortion rate (THD) of the audio equipment, and the material and structural design of the central dome, as the core sound-generating area of ​​the diaphragm, are particularly critical.

[0003] In existing technologies, the central dome diaphragm of headphones and HiFi speakers is mostly made of single-layer films or composite materials (such as metal-deposited films, graphene-deposited / coated films). While these diaphragms have certain advantages in terms of lightweighting or basic rigidity, they are limited by the inherent performance shortcomings of the materials themselves, making it difficult to simultaneously meet the requirements of response speed and distortion control in high-frequency scenarios. Single-layer films generally suffer from insufficient internal attenuation characteristics, easily leading to response delays due to vibration inertia during high-frequency vibrations. Metal or graphene-coated composite materials, on the other hand, suffer from poor bonding stability between the coating and the substrate, making them prone to coating peeling or performance degradation over long-term use, further exacerbating distortion fluctuations and failing to meet the stringent requirements of HiFi equipment for high-frequency audio characteristic stability. Utility Model Content

[0004] The purpose of this invention is to provide a speaker dome diaphragm structure and a HiFi speaker to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a horn dome vibration membrane structure, comprising a central dome top and an outer edge portion, wherein the central dome top and the outer edge portion are bonded together by an adhesive to form a diaphragm structure, wherein the diaphragm of the central dome top is made of a single layer of pure graphene material, and the edge of the central dome top is pressed against the top or bottom of the inner edge of the outer edge portion.

[0006] As a preferred embodiment of this utility model, the diaphragm at the edge is made of silicone material containing polyimide, polyetheretherketone, liquid crystal polymer, thermoplastic polyurethane or elastomer polymer.

[0007] As a preferred embodiment of this utility model, the thickness of the diaphragm at the central dome and the outer edge is 10-100μm.

[0008] A HiFi speaker includes any of the speaker dome diaphragm structures described above, wherein the speaker dome diaphragm structure is located inside the speaker housing and is combined with a voice coil and a driver board to form a HiFi speaker.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] 1) This utility model precisely solves the core problems of poor high-frequency response and high distortion rate of existing diaphragms by adopting a diaphragm structure of "central dome and outer edge". The central dome, made of single-layer pure graphene material, has high tensile strength and low density characteristics. Compared with existing single-layer membranes or composite materials, it can respond quickly during high-frequency vibration and is not prone to deformation, effectively improving the high-frequency response speed. At the same time, the internal attenuation characteristics of pure graphene can suppress the excessive vibration of the diaphragm in the high-frequency range and reduce the distortion rate (THD). This directly solves the problem of high-frequency distortion and response delay caused by the material performance limitations of existing diaphragms. The edge of the central dome is pressed to the top or bottom of the inner edge of the outer edge. The press-bonded fixing structure can ensure the stability of the connection between the two and avoid energy loss or interference during vibration transmission, further ensuring the stable output of high-frequency audio characteristics.

[0011] 2) The outer edge of this invention is made of silicone material containing polyimide (PI), polyetheretherketone (PEEK), liquid crystal polymer (LCP), thermoplastic polyurethane (TPU), or elastomer. Utilizing the excellent flexibility and buffering properties of polymer materials or composite materials, it complements the high-rigidity pure graphene of the central dome. This allows the outer edge to absorb excess energy during vibration through its own elastic deformation, reducing interference with the high-frequency vibration of the central dome. At the same time, its good processing performance facilitates bonding and fixing with the central dome. The central dome and the outer edge are designed with a diaphragm thickness of 10-100μm, ensuring the lightweight of the diaphragm while taking into account the rigidity and structural stability of the diaphragm. This effectively solves the problem of "difficulty in balancing lightweight and rigidity" in existing diaphragms, achieving high-fidelity sound output with accurate high-frequency response and stable distortion rate, fully meeting the technical requirements of high-end HiFi speakers. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the horn dome vibrating diaphragm structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the HIFI speaker structure of this utility model;

[0014] Figure 3 This is one of the schematic diagrams of the HIFI speaker structure of this utility model;

[0015] Figure 4 This is a schematic diagram showing the phase response characteristics of different materials of this invention to signals of different frequencies under a specific voltage.

[0016] Figure 5 This is a schematic diagram showing the relationship between total harmonic distortion and frequency for different materials of this invention under a specific voltage.

[0017] In the diagram: 100, central dome; 200, outer edge. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example 1

[0020] Please see Figure 1-5 This utility model provides a technical solution: a horn dome vibrating diaphragm structure, including a central dome top 100 and an outer edge portion 200. The central dome top 100 and the outer edge portion 200 are bonded together by an adhesive to form a diaphragm structure. The adhesive can be UV, rubber-based, silicone-based, hot melt adhesive, etc. The diaphragm of the central dome top 100 is made of a single layer of pure graphene (98% purity graphene), and the edge of the central dome top 100 is pressed onto the top or bottom of the inner edge of the outer edge portion 200.

[0021] Specifically, during the operation of a HiFi speaker, the voice coil receives an audio signal and vibrates. The vibration is directly transmitted to the speaker dome diaphragm structure that is bonded and fixed. When the vibration acts on the central dome 100, because it is made of a single layer of pure graphene material, its high tensile strength ensures that the dome is not easily deformed during high-frequency vibration, and its low density reduces vibration inertia, allowing the dome to quickly follow the vibration of the voice coil and reduce response delay. Moreover, the internal attenuation characteristics of pure graphene can suppress the excess harmonics generated during vibration and avoid distortion caused by vibration disorder.

[0022] The structural design of pressing the edge of the central dome 100 onto the top or bottom of the inner edge of the outer edge 200 can accurately transmit the vibration of the dome to the outer edge 200. The pressing connection method avoids vibration energy loss caused by gaps between the two, ensuring the consistency of the overall vibration of the diaphragm. The outer edge 200, through the properties of its own material, provides stable support for the central dome 100, preventing excessive displacement of the dome during high-frequency vibration. The two work together to enable the diaphragm to vibrate stably in the high-frequency range, achieving high-fidelity audio output and meeting the requirements of HiFi speakers for high-frequency response and low distortion.

[0023] In this embodiment, the diaphragm of the edge portion 200 is made of silicone material containing polyimide, polyetheretherketone, liquid crystal polymer, thermoplastic polyurethane or elastomer polymer.

[0024] Specifically, when the HiFi speaker is in operation and the voice coil drives the diaphragm to vibrate as a whole, the outer edge 200 serves as a transition area between the diaphragm and the speaker housing, and also undertakes the functions of vibration transmission and buffer protection. The silicone material it uses, containing polyimide (PI), polyetheretherketone (PEEK), liquid crystal polymer (LCP), thermoplastic polyurethane (TPU), or elastomer, possesses excellent flexibility and elasticity. When the central dome 100 vibrates at high frequencies, the outer edge 200 can absorb excess impact force from the vibration energy transmitted from the dome through its own elastic deformation, avoiding vibration reflection caused by direct transmission of vibration to the speaker housing, reducing noise interference in high-frequency vibration. Moreover, the polymer or composite material has excellent fatigue resistance, can withstand high-frequency vibration for a long time without easy performance degradation, ensuring the service life of the diaphragm. The adhesive properties of the silicone material can further enhance the connection stability between the outer edge 200 and the central dome 100, preventing separation under long-term high-frequency vibration, ensuring the integrity of the overall diaphragm structure, and thus maintaining the stability of high-frequency response characteristics and distortion rate. This solves the problem of easy damage to the edge material of traditional diaphragms and its impact on overall sound quality.

[0025] In this embodiment, the membrane thickness of the central dome 100 and the outer edge portion 200 is 10-100 μm.

[0026] Specifically, when a HiFi speaker plays high-frequency audio signals, the central dome 100 will focus on responding to the high-frequency response. When receiving vibration energy from the voice coil, the outer edge 200 generates rich bass based on the low-frequency response and transmits it along the curved surface to the central dome 100. The high-rigidity central dome 100 with low internal loss reduces energy loss and directional deviation during transmission, preventing high-frequency response delay or distortion (see details). Figure 4 and Figure 5 ).

[0027] A thickness of 10-100μm ensures that pure graphene has sufficient rigidity, preventing irregular deformation of the membrane due to excessive thinness during high-frequency vibration. It also controls the overall weight of the membrane, reduces vibration inertia, and allows the central dome 100 to quickly respond to the high-frequency drive signal of the voice coil, improving the high-frequency response speed. Meanwhile, the outer edge 200, made of polymer or composite material, has a reasonable thickness range that balances its flexibility and support while ensuring sound quality.

[0028] A HiFi speaker includes any of the above-mentioned speaker dome diaphragm structures, wherein the speaker dome diaphragm structure is located inside the speaker housing and is combined with a voice coil and a driver board to form a HiFi speaker.

[0029] Specifically, the speaker housing provides a stable installation environment and protective space for the diaphragm, preventing damage to the pure graphene diaphragm of the central dome 100 from external dust, impurities, or physical impacts, ensuring long-term stable operation of the diaphragm. Furthermore, the voice coil, as the driving source of the diaphragm, directly determines the energy transfer efficiency through its connection with the diaphragm. Connected to the diaphragm via a drive plate, the voice coil accurately transmits the mechanical vibration energy converted from audio electrical signals to the central dome 100, enabling the pure graphene dome to respond quickly and generate high-frequency vibrations. Simultaneously, the driving direction of the voice coil aligns with the vibration direction of the diaphragm, reducing energy loss and directional deviation during transmission. The diaphragm, located within the speaker housing, works in conjunction with the acoustic cavity structure of the housing to create a stable acoustic environment within the cavity for the high-frequency sound waves generated by the central dome 100, preventing scattering or attenuation of sound waves during propagation due to external interference, further enhancing the fidelity of high-frequency sound quality.

[0030] The contents not described in detail in this description are existing technologies known to those skilled in the art. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A horn dome resonating diaphragm structure, characterized in that: It includes a central dome (100) and an outer edge (200). The central dome (100) and the outer edge (200) are bonded together with an adhesive to form a diaphragm structure. The diaphragm of the central dome (100) is made of a single layer of pure graphene material, and the edge of the central dome (100) is pressed onto the top or bottom of the inner edge of the outer edge (200).

2. The horn dome resonating diaphragm structure according to claim 1, characterized in that: The diaphragm of the edge portion (200) is made of silicone material containing polyimide, polyetheretherketone, liquid crystal polymer, thermoplastic polyurethane or elastomer polymer.

3. The horn dome resonating diaphragm structure according to claim 1, characterized in that: The membrane thickness of the central dome (100) and the outer edge (200) is 10-100 μm.

4. A HiFi speaker, characterized in that: It includes any one of the speaker dome diaphragm structures according to claims 1-3, wherein the speaker dome diaphragm structure is located inside the speaker housing and is combined with the voice coil and drive plate to form a HiFi speaker.

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