Vibration diaphragm of sound production device

Abstract

The invention relates to a vibration diaphragm of a sound production device. The vibration diaphragm comprises a first engineering plastic layer, a second engineering plastic layer and a glue diaphragm layer located between the first engineering plastic layer and the second engineering plastic layer. The glue diaphragm layer is formed by coating and solidifying high-temperature-resistance glue. The elasticity modulus change value of the glue diaphragm layer from room temperature to 150 DEG C is smaller than 10%. The first engineering plastic layer, the glue diaphragm layer and the first engineering plastic layer are attached together through a compound technology. According to the vibration diaphragm, the high-temperature-resistance glue is coated and solidified to be diaphragm, and attached together with the first engineering plastic layer and the second engineering plastic layer in the mode of the glue diaphragm through the compound technology. Due to the fact that the glue diaphragm layer is good in high temperature resistance, the product can still have the good acoustic properties under high temperature, such as resonant frequency at normal temperature, low distortion, good tone quality and the like.

Description

technical field [0001] The present invention relates to a diaphragm, and more particularly, the present invention relates to a composite diaphragm used in a sound generating device. Background technique [0002] With the improvement of the quality of life, consumers have higher and higher requirements for sound quality, which requires higher and higher performance requirements for the speaker diaphragm in the audio system. Traditional loudspeaker diaphragms are mostly composite diaphragms. However, some limitations of the process structure of these composite diaphragms make the sound quality of the speakers unsatisfactory. [0003] Traditional composite diaphragms usually use adhesive films to achieve the bonding between multi-layer films. The structural characteristics of acrylic adhesive films determine that the speaker diaphragms that use them will inevitably have the following two defects: first , poor heat resistance. With the continuous introduction and application o...

AI Technical Summary

Problems solved by technology

Traditional loudspeaker diaphragms are mostly composite diaphragms. However, some limitations of the process structure of these composite diaphragms make the sound quality of the speakers unsatisfactory.

[0003] Traditional composite diaphragms usually use adhesive films to achieve the bonding between multi-layer films. The structural characteristics of acrylic adhesive films determine that the loudspeaker diaphragms that use them will inevitably have the following two defects: first , poor heat resistance

Under high-temperature molding conditions, the physical properties of the acrylic film will change due to excessive temperature, resulting in problems such as poor molding state of the diaphragm or changes in the properties of the diaphragm; second, poor power resistance and voltage resistance

As the power and voltage test requirements of the speaker are getting higher and higher, the voice coil transmits higher heat when it vibrates, and the properties of the traditional acrylic film are easily changed, which will cause the resonance frequency of the diaphragm to change, the amplitude is too large, and the distortion increases. Problems such as poor hearing

In the prior art, although the rigidity of the diaphragm can be enhanced through some designs, and the temperature of the environment can be reduced through product structure design, etc., the above methods have their limitations.

Images