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Acoustic adjusting material, filling method, sound production device and electronic equipment

A sounding device and acoustic technology, applied in the direction of frequency/direction characteristic devices, etc., can solve the problems of reducing the applicability of expandable fillers and effectively adjusting the expansion degree of expandable fillers, so as to improve durability and service life and reduce the risk of breaking Effect

Inactive Publication Date: 2020-08-14
GOERTEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the expansion is triggered, the expandable filler permanently expands from the initial first size to a fixed second size, and the size does not change any more. It is impossible to effectively adjust the expansion degree of the expandable filler according to different environmental conditions, which reduces the expandability. Suitability of packing

Method used

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  • Acoustic adjusting material, filling method, sound production device and electronic equipment
  • Acoustic adjusting material, filling method, sound production device and electronic equipment
  • Acoustic adjusting material, filling method, sound production device and electronic equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0150] Acoustic adjustment materials include acoustic improvement filler 15 and expandable TPEE filler. Among them, the material of the acoustic improving filler 15 is zeolite. Zeolite is granular, with a physical size of 0.3mm-0.5mm and a density of 0.5g / mL. The mass fraction of expandable polyTPEE filler is 4%.

[0151] The sound device is a miniature speaker module. The volume of the rear acoustic cavity 16 of the micro speaker module is 0.4 cc. The acoustic adjusting materials are mixed and filled into the rear acoustic cavity 16.

[0152] After the filling is completed, the micro speaker module is placed in an oven and heated at 110°C for 20 minutes to foam the expandable TPEE filler.

[0153] The foamed foam cushioning filler has a physical size of 1.4mm and a density of 0.09g / mL. The volume of the foamed cushioning filler accounts for 27% of the volume of the acoustic material filling mixture.

Embodiment 2

[0172] Acoustic adjustment materials include acoustic improvement filler 15 and expandable TPEE filler. Among them, the material of the acoustic improving filler 15 is zeolite. Zeolite is granular, with a physical size of 0.3mm-0.5mm and a density of 0.5g / mL. The mass fraction of expandable TPEE filler is 10%.

[0173] The sound device is a miniature speaker module. The volume of the rear acoustic cavity 16 of the micro speaker module is 0.4 cc. The acoustic adjusting materials are mixed and filled into the rear acoustic cavity 16.

[0174] After the filling is completed, the micro speaker module is placed in an oven and heated at 110°C for 20 minutes to foam the expandable TPEE filler.

[0175] The foamed foam cushioning filler has a physical size of 0.36mm and a density of 0.1g / mL. The volume of the foamed cushioning filler accounts for 25% of the volume of the acoustic material filling mixture.

Embodiment 3

[0194] Acoustic adjustment materials include acoustic improvement filler 15 and expandable TPEE filler. Among them, the material of the acoustic improving filler 15 is molecular sieve. The molecular sieve is granular with a physical size of 0.3mm-0.5mm and a density of 0.5g / mL. The mass fraction of expandable TPEE filler is 1.7%.

[0195] The sound device is a miniature speaker module. The volume of the rear acoustic cavity 16 of the micro speaker module is 0.4 cc. The acoustic adjusting materials are mixed and filled into the rear acoustic cavity 16.

[0196] After the filling is completed, the micro speaker module is placed in an oven and heated at 110°C for 20 minutes to foam the expandable TPEE filler.

[0197] After foaming, the foam cushioning filler has a physical size of 20 mm and a density of 0.07 g / mL. The volume of the foam cushioning filler accounts for 55% of the volume of the acoustic material filling mixture.

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Abstract

The invention discloses an acoustic adjusting material, a sound production device, a filling method and electronic equipment. The acoustic adjusting material includes an expandable thermoplastic elastomer filler and an acoustic improvement filler, wherein the expandable thermoplastic elastomer filler is foamed under a triggered condition to form a foamed filler so as to provide a buffer effect forthe acoustic improvement filler during moving collision, and the volume of the foamed expandable thermoplastic elastomer filler is changed along with the change of the temperature and / or the foamingtime. In this way, the risk that the acoustic improvement filler is broken is greatly reduced, the durability of the acoustic improvement material is improved, and the service lifetime of the acoustically adjusted material is prolonged.

Description

Technical field [0001] The present invention relates to the technical field of electro-acoustic conversion, and more specifically, to an acoustic adjustment material of a sound emitting device, a filling method, a sound emitting device and an electronic device. Background technique [0002] The sound emitting device, such as a receiver or a speaker, usually includes a housing and a sound emitting unit housed in the housing. The vocal unit divides the cavity in the housing into a front acoustic cavity and a rear acoustic cavity. The front acoustic cavity is in communication with the sound outlet, and the sound waves generated by the sounding monomer are radiated from the front acoustic cavity. The rear acoustic cavity is in communication with the vocal unit. The vibrating airflow on the opposite side of the sound wave can radiate into the rear acoustic cavity. The rear acoustic cavity is used to adjust the low frequency effect of the sound device. [0003] In order to better ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/00C08L87/00C08K7/26C08K7/24C08K3/36C08J9/14C08J9/10C08J9/08H04R1/28
CPCC08J9/141C08J9/104C08J9/08C08J9/0066C08J9/0061H04R1/28C08J2367/00C08J2400/26C08J2487/00C08J2203/14C08J2203/04C08J2203/02
Inventor 潘泉泉姚阳阳凌风光李春刘春发
Owner GOERTEK INC