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Vibration plate and sound production device

A technology of sound-generating device and vibrating plate, which is applied in the direction of fiber diaphragm, flat diaphragm, polymer material diaphragm, etc. , abnormal sound of the sounding device, etc., to achieve the effect of good sounding effect, low distortion and accurate sounding

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 aluminum. The paper vibrating plate is also called the paper cone. The paper cone has a low density, but its modulus is low, and the high-frequency extension frequency is limited. The bending ability and friction resistance are poor, and it is easy to wear and break during use, resulting in abnormal sound of the sounding device
Compared with the paper cone, although the aluminum vibrating plate has an excellent modulus and wide high-frequency expansion, due to the low damping of the aluminum material, the distortion of the generator composed of the vibrating plate is relatively high, and the aluminum vibrating plate The vibrating plate is easily deformed when it is impacted, and it will also cause abnormal sound of the sounding device

Method used

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  • Vibration plate and sound production device

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0063] It should be noted that the vibrating plate of the present invention can be prepared by the following steps:

[0064] Firstly, polyamide fibers and carbon fibers are dispersed in a solvent, mixed evenly, and the solvent is removed to obtain a composite fiber material. Wherein, the mass ratio of the polyamide fiber and the carbon fiber ranges from 100:5 to 100:90. 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.

[0065] Secondly, the composite fiber material is placed in a mold and compressed according to a predetermined compression ratio to prepare a composite fiber layer with a predetermined density.

[0066] It should be noted that, in order to enhance the bonding force between the carbon fiber and the polyamide fiber in the composite fiber, a binder fiber is also added t...

Embodiment 1

[0072] The vibrating plate of this embodiment is prepared by the following steps:

[0073] 1. In terms of mass, weigh 100 parts of polyamide 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.

[0074] 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.

[0075] 3. The two kinds of fibers are removed from the ethanol solvent together, and after drying and removing the ethanol solvent, a composite fiber material uniformly composited between carbon fiber and polyamide fiber is obtained, and the composite fiber material has a three-dimensional network structure.

[0076] 4. Put the composite fiber material in the mold and compress it according to a pred...

Embodiment 2

[0079] The carbon fibers in Example 1 were treated with a coupling agent, and other steps were the same as those in Example 1.

[0080] The specific steps of carbon fiber treated by coupling agent are as follows:

[0081] 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.

[0082] 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.

[0083] Then the treated carbon fibers are filtered out and dried to obtain surface-treated carbon fibers.

[0084] 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 composite fibers in the composite fiber layer comprise polyamide fibers and carbon fibers. According to the technical scheme of the invention, the sound production device has a good sound production effect.

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 needs to have a high modulus, a low density and good damping in order to have a good sound effect. In the related art, the material of the vibrating plate is usually paper and aluminum. The paper vibrating plate is also called the paper cone. The paper cone has a low density, but its modulus is low, and the high-frequency extension frequency is limited. The bending ability and friction resistance are poor, and it is easy to be worn and damaged during use, resulting in abnormal sounding of the sounding device. Compared with the paper cone, although the aluminum vibrating plate has an excellent modulus and wide high-frequency expansion, due to the low damping of the aluminum material, the distor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R7/04H04R7/18H04R9/02H04R9/06H04R31/00
CPCH04R7/04H04R7/18H04R9/02H04R9/06H04R31/003H04R2307/025H04R2307/029H04R2231/001
Inventor 王述强惠冰凌风光李春
Owner GOERTEK INC
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