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Vibration plate and sound production device

A technology of sound-generating device and vibrating plate, applied in the direction of flat diaphragm, fiber diaphragm, polymer material diaphragm, etc., can solve the problems of low high-frequency cut-off frequency, narrow frequency response range, small density, etc. Wide-ranging, low-density effects

Pending Publication Date: 2021-11-26
GOERTEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the related art, the material of the vibrating plate is usually paper, and the paper vibrating plate is also called the paper cone. The paper cone has a small density, suitable internal damping, and the middle and low frequency sounds are soft, but the modulus of the paper cone material is low. , the high-frequency cut-off frequency is low, it is difficult to have a good sound effect in the high-frequency band, and the frequency response range is narrow

Method used

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  • Vibration plate and sound production device
  • Vibration plate and sound production device
  • Vibration plate and sound production device

Examples

Experimental program
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Effect test

preparation example Construction

[0062] It should be noted that the vibrating plate of the present invention can be prepared by the following steps:

[0063] Firstly, polymer fiber and carbon fiber are dispersed in a solvent, mixed evenly, and the solvent is removed to obtain a composite fiber material. Wherein, based on 100 parts of the total mass of the composite fiber, the content of the polymer fiber is 50-90 parts, and the content of the carbon fiber is 5-50 parts. Here the solvent can be water or an organic solvent, and the organic solvent can be one of methanol, ethanol, isopropanol, acetone, methyl ethyl ketone, ethyl acetate, butyl acetate, n-hexane, cyclohexane, sherwood oil, toluene or Various mixes.

[0064] Secondly, the composite fiber material is placed in a hot-pressing mold, and the cone-shaped composite fiber layer is hot-pressed at a hot-pressing temperature of 180°C-200°C.

[0065] At the same time, the foam material is cut into shape, placed in a hot-pressing mold, and subjected to hot-...

Embodiment 1

[0073] The vibrating plate of this embodiment is prepared by the following steps:

[0074] 1. By mass, weigh 100 parts of polymer fibers with a diameter of 10 μm, cut them into short fibers with a length of 20mm-40mm, and disperse them in 400 parts of ethanol solvent, and stir to make them evenly dispersed.

[0075] 2. Weigh 40 parts of carbon fibers with a diameter of 7 μm, cut them into short fibers with an average length of 20 mm, add them to the above-mentioned ethanol solvent, and continue to stir so that the two fibers are evenly dispersed in the ethanol solvent.

[0076] 3. The two kinds of fibers are removed from the ethanol solvent, and after the ethanol solvent is removed by drying, a composite fiber material uniformly composited between carbon fiber and polymer fiber is obtained, and the composite fiber material has a three-dimensional network structure.

[0077] 4. Put the composite fiber material in the mold, and perform hot-press molding at a temperature of 190°C...

Embodiment 2

[0082] The carbon fibers in Example 1 were treated with a coupling agent, and other steps were the same as those in Example 1.

[0083] The specific steps of carbon fiber treated by coupling agent are as follows:

[0084] First, take 10 parts of the coupling agent and add it into a blended solvent of 100 parts of water and 900 parts of ethanol, and fully stir to obtain a pretreatment agent.

[0085] Then take 40 parts of carbon fibers with a diameter of 7 μm, cut them into short fibers with an average length of 20 mm, add them to the above pretreatment agent, stir them thoroughly, and let them stand for 4 hours.

[0086] Then the treated carbon fibers are filtered out and dried to obtain surface-treated carbon fibers.

[0087] It should be noted that the coupling agent here can be selected from one of KH-540, KH-550, KH-560, KH-570, KH-590, KH-792, Si-602, Si-563, and A-151 or more. Moreover, based on 100 parts by mass of the blended solvent, the amount of the coupling agen...

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Abstract

The invention discloses a vibration plate and a sound production device. The vibration plate comprises at least one composite fiber layer and at least one foaming body material layer, the at least one composite fiber layer and the at least one foaming body material layer are arranged in a stacked mode, and composite fibers in the composite fiber layer comprise carbon fibers. According to the technical scheme, the modulus of the vibration plate can be improved, and the frequency response range of the vibration plate is widened.

Description

technical field [0001] The invention relates to the technical field of sound generating devices, in particular to a vibrating plate and a sound generating device. Background technique [0002] As the main part of the sound generating device (such as a loudspeaker), the vibration plate is required to have a lower density in order to improve the sensitivity of the sound generating device. In order to increase its high-frequency cutoff frequency, the material of the vibration plate is required to have sufficient elastic modulus. , in order to prevent excessive distortion of the vibrating plate, the material of the vibrating plate is required to have appropriate internal damping. In the related art, the material of the vibrating plate is usually paper, and the paper vibrating plate is also called the paper cone. The paper cone has a small density, suitable internal damping, and the middle and low frequency sound is soft, but the modulus of the paper cone material is low. , the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R7/04H04R7/10H04R7/18H04R9/02H04R9/06H04R31/00B32B25/10B32B27/02B32B27/12B32B9/00B32B9/04B32B27/30B32B27/34B32B27/28B32B27/32B32B27/36B32B7/10B32B7/12
CPCH04R7/04H04R7/10H04R7/18H04R9/02H04R9/06H04R31/003B32B7/12B32B5/245B32B7/10B32B2262/106B32B2262/02B32B2262/0261B32B2262/0253B32B2262/0284B32B2266/0207B32B2266/0214B32B2266/0257B32B2266/0228H04R2307/025H04R2307/029H04R2231/001B32B2307/10
Inventor 王述强惠冰凌风光李春
Owner GOERTEK INC
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