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., can solve the problems of abnormal sound of the sound-generating device, easy dehydration and brittleness of the paper cone, and heating of the voice coil, so as to achieve accurate sound production. , low distortion, suitable damping effect

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

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Problems solved by technology

In related technologies, the material of the vibrating plate is usually paper, and the paper vibrating plate is also called paper cone. The paper cone has certain rigidity, suitable internal damping and low density, but the paper material is easy to change at different temperatures. , especially at high temperatures, the paper cone is more likely to dehydrate and become brittle. Therefore, when the power of the sound generating device is high, the voice coil heats up more seriously, and the paper cone is difficult to withstand high temperature, resulting in abnormal sound of the sound generating device

Method used

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

Examples

Experimental program
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Effect test

preparation example Construction

[0064] It should be noted that the vibrating plate of the present invention can be prepared by the following steps:

[0065] First, polyetherimide 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 polyetherimide fiber to 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.

[0066] 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.

[0067] It should be noted that, in order to enhance the bonding force between the carbon fiber and the polyetherimide fiber in the composite fiber, a bonding fiber is...

Embodiment 1

[0074] The vibrating plate of this embodiment is prepared by the following steps:

[0075] 1. In terms of mass, weigh 100 parts of polyetherimide 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.

[0076] 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.

[0077] 3. Remove the two kinds of fibers from the ethanol solvent together, and dry and remove the ethanol solvent to obtain a composite fiber material uniformly composited between carbon fiber and polyetherimide fiber, and the composite fiber material has a three-dimensional network structure.

[0078] 4. Put the composite fiber material in the mold and compress it according to a predetermined...

Embodiment 2

[0081] The carbon fibers in Example 1 were treated with a coupling agent, and other steps were the same as those in Example 1.

[0082] The specific steps of carbon fiber treated by coupling agent are as follows:

[0083] 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.

[0084] 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.

[0085] Then the treated carbon fibers are filtered out and dried to obtain surface-treated carbon fibers.

[0086] 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 polyetherimide fibers and carbon fibers. According to the technical scheme, it can be guaranteed that the sound production device has a good sound production effect under large use power.

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] The vibration plate is the main part of the sound generating device (such as a loudspeaker), and the selection of its material will affect the power of the sound generating device. In related technologies, the material of the vibrating plate is usually paper, and the paper vibrating plate is also called paper cone. The paper cone has certain rigidity, suitable internal damping and low density, but the paper material is easy to change at different temperatures. , especially at high temperatures, the paper cone is more likely to dehydrate and become brittle. Therefore, when the power of the sounding device is high, the voice coil heats up more seriously, and the paper cone is difficult to withstand high temperatures, resulting in abnormal sounding of the sounding device. [0003] The ab...

Claims

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Application Information

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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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