公开(公告)号：US20220251253A1

公开(公告)日：2022-08-11

申请号：US17614205

申请日：2020-04-20

Applicant: Goertek Inc.

Inventor： Bing Hui ,  Shuqiang Wang ,  Fengguang Ling ,  Chun Li ,  Chunfa Liu

IPC: C08F22/10 ,  H04R31/00 ,  H04R7/02 ,  C08K5/00 ,  C08K5/11 ,  C08K5/12 ,  C08J3/24

Abstract: A diaphragm for a miniature sound generating device, wherein the diaphragm is made of a polyacrylate copolymer, a plasticizer is mixed in the polyacrylate copolymer, the polyacrylate copolymer is 100 parts by mass, and the plasticizer comprises at least one of aliphatic dibasic acid esters, phthalic acid esters, benzene polyacid esters, benzoic ethers, polyol esters, chlorinated hydrocarbons, epoxides, citrate esters and polyesters. The diaphragm possesses excellent sound performance.

公开(公告)号：US20240121552A1

公开(公告)日：2024-04-11

申请号：US17767517

申请日：2019-12-24

Applicant: Goertek, Inc.

Inventor： Bing Hui ,  Fengguang Ling ,  Chun Li ,  Chunfa Liu

IPC: H04R1/28 ,  C08F222/30 ,  C08K3/04 ,  C08L9/02

CPC classification number: H04R1/2811 ,  C08F222/30 ,  C08K3/04 ,  C08L9/02 ,  H04R2201/029

Abstract: The present disclosure provides a vibrating diaphragm for a miniature sound-producing device and the miniature sound-producing device. The vibrating diaphragm is made of nitrile rubber; the nitrile rubber is prepared by performing cross-linking polymerization on polyacrylonitrile as a polymerization main monomer and a crosslinking monomer which is polybutadiene, and the content of a polyacrylonitrile block of the polymerization main monomer in the nitrile rubber is 10 to 70 wt %. The vibrating diaphragm provided by the present disclosure has more excellent structural stability, anti-polarization capability and low frequency sensitivity. The miniature sound-producing device provided by the present disclosure has more excellent acoustic performance.

公开(公告)号：US11800288B2

公开(公告)日：2023-10-24

申请号：US17619049

申请日：2020-04-21

Applicant: Goertek inc.

Inventor： Shuqiang Wang ,  Bing Hui ,  Fengguang Ling ,  Chun Li ,  Chunfa Liu

IPC: H04R7/12 ,  B32B25/14 ,  H04R9/02 ,  H04R9/06 ,  H04R31/00 ,  B32B7/022 ,  B32B25/04 ,  C08J5/18

CPC classification number: H04R7/125 ,  B32B7/022 ,  B32B25/042 ,  B32B25/14 ,  C08J5/18 ,  H04R9/025 ,  H04R9/06 ,  H04R31/003 ,  B32B2250/248 ,  B32B2307/306 ,  B32B2307/51 ,  B32B2307/536 ,  B32B2307/54 ,  B32B2307/554 ,  B32B2307/5825 ,  B32B2307/732 ,  B32B2457/00 ,  C08J2323/16 ,  H04R2307/025

Abstract: Disclosed are a diaphragm for a sound generating device and a sound generating device. The diaphragm comprising at least one elastomer layer, wherein the elastomer layer is made of an ethylene propylene diene monomer; and the ethylene propylene diene monomer is formed by polymerizing three monomers, the three monomers being an ethylene monomer, a propylene monomer and a non-conjugated diene monomer respectively, a mass ratio of the ethylene monomer to the propylene monomer ranging from 0.25 to 4, and content of the non-conjugated diene monomer being 1%-15% of total content of the ethylene monomer and the propylene monomer. The ethylene propylene diene monomer has excellent high-temperature resistance and thermo-oxidative aging resistance; and after the rubber is made into the diaphragm, the diaphragm is capable of working in a high-temperature environment for a long time, maintaining not only excellent elasticity but also excellent anti-fatigue characteristic, thereby possessing excellent reliability.

公开(公告)号：US20220360902A1

公开(公告)日：2022-11-10

申请号：US17619049

申请日：2020-04-21

Applicant: Goertek Inc.

Inventor： Shuqiang Wang ,  Bing Hui ,  Fengguang Ling ,  Chun Li ,  Chunfa Liu

IPC: H04R7/12 ,  H04R9/06 ,  H04R9/02 ,  H04R31/00 ,  C08J5/18 ,  B32B7/022 ,  B32B25/04 ,  B32B25/14

Abstract: Disclosed are a diaphragm for a sound generating device and a sound generating device. The diaphragm comprising at least one elastomer layer, wherein the elastomer layer is made of an ethylene propylene diene monomer; and the ethylene propylene diene monomer is formed by polymerizing three monomers, the three monomers being an ethylene monomer, a propylene monomer and a non-conjugated diene monomer respectively, a mass ratio of the ethylene monomer to the propylene monomer ranging from 0.25 to 4, and content of the non-conjugated diene monomer being 1%-15% of total content of the ethylene monomer and the propylene monomer. The ethylene propylene diene monomer has excellent high-temperature resistance and thermo-oxidative aging resistance; and after the rubber is made into the diaphragm, the diaphragm is capable of working in a high-temperature environment for a long time, maintaining not only excellent elasticity but also excellent anti-fatigue characteristic, thereby possessing excellent reliability.