Waterproof and dustproof composite structure of voice diaphragm

Abstract

The utility model relates to the field of voice diaphragms, and discloses a voice diaphragm waterproof and dustproof composite structure, which comprises a voice diaphragm body, and a waterproof layer, a buffer layer, a dustproof layer and a reinforcing layer are sequentially laid on the outer surface of the voice diaphragm body from bottom to top. The waterproof layer uniformly covers the surface of the voice diaphragm body by a self-repairing nanoscale polymer waterproof coating material through a vacuum plasma spraying process; the buffer layer is formed by compounding two layers of porous silica gel materials with different pore diameters through an interpenetrating network structure and is arranged between the waterproof layer and the dustproof layer; the dustproof layer is a double-layer electrostatic adsorption type dustproof net, the inner layer is a polyester fiber net, and the outer layer is a polyester fiber net subjected to nano-silver ion treatment; the reinforcing layer is located on the outer side of the dustproof layer and is composed of a high-strength carbon fiber reinforced thermoplastic plastic film with carbon fibers distributed in a three-dimensional staggered mode, and the waterproof and dustproof composite structure of the voice diaphragm meets the requirements of modern consumers for high performance and high reliability of audio equipment in a complex environment.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of sound film, concretely is a sound film waterproof dustproof composite structure. BACKGROUND

[0002] In modern audio equipment, whether it is daily use earphone, sound box or professional level sound system, sound film plays a very key role. As the core component of sound transmission, the performance of sound film directly determines the sound quality performance of audio equipment. With the improvement of people's living quality and the continuous expansion of audio equipment application scene, higher requirements are put forward for the waterproof and dustproof performance of sound film. The sound film with excellent waterproof and dustproof performance not only can work stably in humid, dusty and other harsh environments, prolong the service life of audio equipment, but also can always maintain the clarity and stability of sound quality, meet the pursuit of high-quality audio of users in various scenes, which makes the sound film waterproof and dustproof composite structure become an indispensable key technology in the field of audio.

[0003] However, the traditional sound film waterproof and dustproof technology has many defects. In terms of waterproof, simple coating or film covering is often used in the past. Once these materials are slightly worn or impacted by external force, the waterproof performance will be greatly reduced, which cannot effectively resist the long-term erosion of water, causing the sound film to be damp and deformed, affecting the normal transmission of sound. In terms of dust prevention, the ordinary dust screen has large mesh diameter and is difficult to filter out small dust particles. Dust is easy to accumulate on the surface of the sound film, changing the vibration characteristics of the sound film and reducing the clarity of the sound quality. In addition, the structural stability of the traditional sound film is poor, the connection between the layers is not firm enough, and when affected by temperature change, humidity or external vibration, delamination and glue separation problems are easy to occur, which seriously affects the reliability and service life of the audio equipment. Therefore, we propose a sound film waterproof and dustproof composite structure. CONTENT OF THE UTILITY MODEL

[0004] (I) Technical problem solved

[0005] In view of the defects of the prior art, the utility model provides a sound film waterproof and dustproof composite structure, which solves the above problems.

[0006] (II) Technical scheme

[0007] In order to achieve the above purpose, the utility model provides the following technical scheme: a sound film waterproof and dustproof composite structure, comprising a sound film body, a waterproof layer, a buffer layer, a dustproof layer and a reinforcing layer are sequentially laid from bottom to top on the outer surface of the sound film body;

[0008] The waterproof layer is uniformly covered on the surface of the sound film body by vacuum plasma spraying process of self-repairing nanoscale high molecular waterproof coating material, and the coating thickness is 40-110 nanometers;

[0009] The buffer layer is composed of two layers of porous silica gel materials with different pore sizes by interpenetrating network structure, is arranged between the waterproof layer and the dustproof layer, and has a porosity of 20% to 60%;

[0010] The dustproof layer is a double-layer electrostatic adsorption type dustproof net, the inner layer is a 90-mesh to 170-mesh polyester fiber net, and the outer layer is a 280-mesh to 520-mesh polyester fiber net treated by nano silver ions.

[0011] The reinforcing layer is located on the outer side of the dustproof layer and is composed of a high-strength carbon fiber reinforced thermoplastic plastic film with three-dimensional staggered distribution of carbon fibers, and the film has a thickness of 0.08 mm to 0.32 mm.

[0012] Preferably, the diaphragm body is made of a polyimide film subjected to stretching and orientation treatment.

[0013] Preferably, the waterproof layer contains microcapsules in the self-repairing nano-scale high-molecular waterproof coating material.

[0014] Preferably, the inner layer of the buffer layer is a large-pore silica gel, and the outer layer is a small-pore silica gel.

[0015] Preferably, the connection between the diaphragm body, the waterproof layer, the buffer layer, the dustproof layer and the reinforcing layer adopts an integrated edge covering process of double connection modes of light-cured environment-friendly adhesive and ultrasonic welding.

[0016] (Three) beneficial effects

[0017] Compared with the prior art, the diaphragm waterproof and dustproof composite structure has the following beneficial effects:

[0018] Excellent waterproof performance: the waterproof layer adopts a self-repairing nano-scale high-molecular waterproof coating material, and the microcapsules in the coating can automatically release a repairing agent to fill the gap when the coating is damaged, thereby continuously and effectively blocking water, ensuring that the diaphragm is not eroded by water even in a harsh and humid environment, and greatly prolonging the service life of the diaphragm.

[0019] High-efficiency dustproof capability: the double-layer electrostatic adsorption type dustproof net has an inner layer of a coarse-mesh net for preliminary interception of large particles and an outer layer of a fine-mesh net treated by nano silver ions for capturing small particles by virtue of stronger electrostatic adsorption force, and can also resist bacteria and mildew, effectively preventing dust and bacteria from polluting the diaphragm and ensuring clear and stable sound quality.

[0020] Excellent buffer protection: the buffer layer composed of two layers of porous silica gel with different pore sizes is connected by an interpenetrating network structure to form a gradient buffer effect, which can effectively disperse large impact force and gently buffer small vibrations, and protect the diaphragm from external impact damage in all directions.

[0021] Strong reinforcement: the three-dimensional interlaced distribution of high-strength carbon fiber reinforced thermoplastic plastic film reinforcement layer of carbon fiber significantly improves the tensile and tear resistance of the entire composite structure, so that it can still maintain the structural integrity under the action of complex external force, and ensures the normal work of the sound film.

[0022] Stable structure connection: the preliminary adhesion between layers is carried out by using light-cured environmentally friendly adhesive, and then the integrated edge sealing process is carried out through ultrasonic welding, so that the structure stability is enhanced by the double connection mode, the problem of adhesive aging and peeling is avoided, and the performance stability of the composite structure in various environments is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a structural schematic view of the utility model;

[0024] Figure 2 It is a sectional view schematic view of the utility model;

[0025] Figure 3 It is Figure 2 A local enlarged schematic view of the utility model.

[0026] In the figure: 1, sound film body; 2, waterproof layer; 3, buffer layer; 4, dustproof layer; 5, reinforcement layer. DETAILED DESCRIPTION

[0027] The technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0028] Please refer to Figures 1-3 A sound film waterproof and dustproof composite structure, comprising a sound film body 1, a waterproof layer 2, a buffer layer 3, a dustproof layer 4 and a reinforcement layer 5 are sequentially laid from bottom to top on the outer surface of the sound film body 1.

[0029] The waterproof layer 2 is uniformly covered on the surface of the sound film body 1 by vacuum plasma spraying process of self-repairing nanoscale high molecular waterproof coating material, and the coating thickness is 40-110 nanometers;

[0030] The buffer layer 3 is composed of two layers of porous silica gel materials with different pore sizes through interpenetrating network structure, and is arranged between the waterproof layer 2 and the dustproof layer 4, and the porosity is between 20% and 60%;

[0031] The dustproof layer 4 is a double-layer electrostatic adsorption type dustproof net. The inner layer is a 90-mesh to 170-mesh polyester fiber net, and the outer layer is a 280-mesh to 520-mesh polyester fiber net treated by nano-silver ions. The inner layer is a polyester fiber net with a coarse mesh number, which is used to preliminarily intercept larger particles of dust and impurities. The outer layer is a fine-mesh polyester fiber net treated by special nano-silver ions, which not only has stronger electrostatic adsorption capacity and can capture smaller particles, but also has antibacterial and mildew-proof functions to prevent bacteria from growing due to dust accumulation, thereby affecting the sound quality and the service life of the diaphragm.

[0032] The reinforcing layer 5 is located outside the dustproof layer 4 and is composed of a high-strength carbon fiber reinforced thermoplastic plastic film with three-dimensionally staggered carbon fibers. The film thickness is between 0.08 mm and 0.32 mm. The high-strength carbon fiber reinforced thermoplastic plastic film with three-dimensionally staggered carbon fibers significantly improves the tensile and tear resistance of the entire composite structure, so that it can maintain structural integrity under complex external forces and ensure normal operation of the diaphragm.

[0033] Further, the diaphragm body 1 is made of a stretched and oriented polyimide film. This treatment forms an orderly arranged molecular chain structure at the microscopic level, which greatly improves the toughness of the material and optimizes its acoustic response characteristics, enabling more accurate and efficient transmission of sound signals and achieving high-fidelity sound reproduction.

[0034] Further, the waterproof layer 2 contains microcapsules in the self-repairing nano-scale polymer waterproof coating material. When the coating is slightly damaged, the microcapsules rupture and release a repair agent to automatically fill the damaged area, continuously maintaining excellent waterproof performance. The waterproof coating is uniformly and firmly covered on the surface of the diaphragm body through vacuum plasma spraying process.

[0035] Further, the inner layer of the buffer layer 3 is large-pore silica gel, and the outer layer is small-pore silica gel. The buffer layer is composed of two layers of porous silica gel materials with different properties. The inner layer is large-pore silica gel, which provides an initial buffer space and effectively disperses impact force. The outer layer is small-pore silica gel, which enhances the delicacy and sealing performance of the buffer. The two layers are connected through an interpenetrating network structure to form a unique gradient buffer effect.

[0036] Further, the connection between the sound film body 1, the waterproof layer 2, the buffer layer 3, the dustproof layer 4 and the reinforcing layer 5 adopts a double connection mode of light-cured environmentally friendly adhesive and ultrasonic welding integrated edge sealing process. The adhesive rapidly solidifies under ultraviolet irradiation to form preliminary adhesive force. Then, the ultrasonic welding integrated edge sealing process is adopted at the edge of the sound film to firmly weld all the layers together to form a sealed whole. The double connection mode not only enhances the stability of the structure, but also avoids the aging and delamination problems of the adhesive that may occur during long-term use, ensuring that the composite structure can maintain good performance in various complex environments.

[0037] Working principle: When external moisture contacts the waterproof and dustproof composite structure of the sound film, the waterproof layer 2 plays a role first. The waterproof layer adopts a self-repairing nanoscale high-molecular waterproof coating material, which contains microcapsules inside that exist stably under normal conditions. Once the coating surface is slightly scratched or worn, the microcapsules break and release repair agents, which automatically polymerize at the damaged site to fill gaps and holes, thereby continuously maintaining the integrity of the waterproof coating and effectively blocking further penetration of moisture into the sound film body. This self-repairing mechanism ensures that even if the waterproof layer is damaged to some extent during long-term use, it can still maintain good waterproof performance, ensuring that the sound film is not affected by a humid environment and maintaining normal sound transmission function.

[0038] The dustproof work mainly relies on the double-layer electrostatic adsorption dustproof net. The inner polyester fiber net first physically intercepts larger dust and impurities in the air, blocking these visible particles outside. The outer polyester fiber net treated with nano silver ions uses the principle of electrostatic adsorption to generate strong adsorption force on small dust particles. When small particles in the air approach the dustproof net, they are attracted and attached to the dustproof net by the electrostatic field. At the same time, the nano silver ions endow the outer dustproof net with antibacterial and mildew-proof functions, inhibiting the growth of microorganisms in the dust and preventing damage to the sound film caused by dust accumulation and microbial proliferation, thereby ensuring the cleanliness of the sound film surface and allowing the sound film to vibrate freely and smoothly, ensuring the clarity and purity of sound quality.

[0039] The buffer layer 3 is composed of two layers of porous silica gel with different pore sizes through interpenetrating network structure. When the sound film is impacted by external impact, the inner layer of large-pore silica gel first absorbs the larger impact force and disperses it through its elastic deformation. Then, the outer layer of small-pore silica gel further buffers and filters the residual small vibrations. The interpenetrating network structure between the two layers of silica gel enables them to work together to form a gradient buffering effect, protecting the sound film from external impact in all directions and multiple levels, avoiding damage such as deformation and rupture of the sound film due to external force, and ensuring that the sound film can work stably in various complex environments.

[0040] The reinforcing layer 5 adopts a high-strength carbon fiber reinforced thermoplastic plastic film with three-dimensional interlaced distribution of carbon fibers. When the diaphragm is subjected to external forces such as stretching and tearing, the three-dimensionally interlaced carbon fibers form a strong skeleton structure, which can effectively disperse stress. The carbon fibers themselves have the characteristics of high strength and high modulus, and can withstand a large tensile force and pressure, thereby enhancing the tensile and tear resistance of the entire composite structure. This reinforcing effect enables the diaphragm to maintain the integrity of the structure at all times during external force impact or long-term use, avoids affecting the performance of the diaphragm due to structural damage, and greatly improves the reliability and service life of the audio equipment.

[0041] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A waterproof and dustproof composite structure of a sound film, comprising a sound film body (1), characterized in that: The outer surface of the sound film body (1) is sequentially coated from bottom to top with a waterproof layer (2), a buffer layer (3), a dustproof layer (4) and a reinforcing layer (5); The waterproof layer (2) is uniformly coated on the surface of the sound film body (1) by a vacuum plasma spraying process with a self-repairing nanoscale high polymer waterproof coating material, and the coating thickness is 40-110 nanometers; The buffer layer (3) is composed of two layers of porous silica gel materials with different pore sizes through interpenetrating network structure, and is arranged between the waterproof layer (2) and the dustproof layer (4), with a porosity of 20% to 60%; The dustproof layer (4) is a double-layer electrostatic adsorption dustproof net, the inner layer is a 90-mesh to 170-mesh polyester fiber net, and the outer layer is a 280-mesh to 520-mesh polyester fiber net treated by nano silver ions; The reinforcing layer (5) is located outside the dustproof layer (4) and is composed of a high-strength carbon fiber reinforced thermoplastic plastic film with three-dimensional staggered distribution of carbon fibers, and the film thickness is between 0.08mm and 0.32mm.

2. The waterproof and dustproof composite structure of a sound film according to claim 1, characterized in that: The sound film body (1) is made of a polyimide film subjected to stretching and orientation treatment.

3. The waterproof and dustproof composite structure of a sound film according to claim 1, characterized in that: The self-repairing nanoscale high polymer waterproof coating material of the waterproof layer (2) contains microcapsules inside.

4. The waterproof and dustproof composite structure of a sound film according to claim 1, characterized in that: The inner layer of the buffer layer (3) is large-pore silica gel, and the outer layer is small-pore silica gel.

5. The waterproof and dustproof composite structure of a sound film according to claim 1, characterized in that: The connection between the sound film body (1), the waterproof layer (2), the buffer layer (3), the dustproof layer (4) and the reinforcing layer (5) adopts an integrated edge bonding process of light curing environment-friendly adhesive and ultrasonic welding double connection mode.

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