公开(公告)号：US20240251215A1

公开(公告)日：2024-07-25

申请号：US18561760

申请日：2022-05-26

Applicant: GOERTEK INC.

Inventor： Ting WANG ,  Chun LI ,  Qiulin WEI

IPC: H04R31/00 ,  H04R7/04

CPC classification number: H04R31/003 ,  H04R7/04 ,  H04R2307/025

Abstract: The present invention relates to a diaphragm for sound generating devices and a preparation method thereof, and a sound generating device. The diaphragm for sound generating devices comprises only one layer of a thermoplastic polyester elastomer film, wherein the thermoplastic polyester elastomer is formed by copolymerization of a polyester hard segment which is prepared by reacting an aromatic dicarboxylic acid with a dihydric alcohol and a soft segment containing an aliphatic polycarbonate, and the diaphragm has a thickness of 10-200 □m, and a loss factor of 0.1-0.3 at a temperature of 23° C. The thermoplastic polyester elastomer used for the diaphragm of the present invention is composed of the polyester hard segment and the aliphatic polycarbonate soft segment, and such material not only solves the problem that the existing thermoplastic elastomers have poor resistances to high temperatures and chemicals, but also improves sensitivity, and can also well achieve the basic properties such as stiffness, resilience and damping required by vibration of the diaphragm.

公开(公告)号：US20230345178A1

公开(公告)日：2023-10-26

申请号：US18027998

申请日：2021-08-25

Applicant: GOERTEK INC.

Inventor： Cuicui WANG ,  Bing HUI ,  Fengguang LING ,  Chun LI

IPC: H04R7/02 ,  H04R9/02

CPC classification number: H04R7/02 ,  H04R9/025

Abstract: A diaphragm and a sound generating apparatus. The diaphragm comprises at least one elastomer layer, and the elastomer layer is made of a rubber compound. The rubber compound comprises nitrile rubber and hydrogenated nitrile rubber. Both the nitrile rubber and the hydrogenated nitrile rubber contain acrylonitrile blocks. In terms of mass percentage, the range of the content of acrylonitrile blocks is 20% to 80%. The described diaphragm has excellent mechanical strength, cold resistance, and resilience, and has high damping performance.

公开(公告)号：US20240040319A1

公开(公告)日：2024-02-01

申请号：US18264256

申请日：2021-08-25

Applicant: GOERTEK INC.

Inventor： Quanquan PAN ,  Fengguang LING ,  Chun LI

IPC: H04R9/02 ,  H04R9/06

CPC classification number: H04R9/025 ,  H04R9/06

Abstract: Disclosed is a sound generating device. The sound generating device includes a sound generating unit, a plurality of magnetic sound-absorbing particles, and a housing having a cavity, wherein the sound generating unit is accommodated in the cavity, and the sound generating unit divides the cavity into a front cavity and a rear cavity, and the magnetic sound-absorbing particles are filled in the front cavity and/or the rear cavity, and a magnetic attraction force is exerted between the a plurality of magnetic sound-absorbing particles. In the disclosure, magnetic sound-absorbing particles are used to achieve a virtual increase effect in a resonance space of the acoustic rear cavity of the sound generating device, the magnetic sound-absorbing particles attract each other and attached together, thereby restricting the free flow between the particles, reducing the phenomenon that the magnetic sound-absorbing particles break, and effectively protecting the acoustic performance of the sound generating device.

公开(公告)号：US20230262394A1

公开(公告)日：2023-08-17

申请号：US17631015

申请日：2018-12-14

Applicant: GOERTEK INC.

Inventor： Fengguang LING ,  Shuqiang WANG ,  Chun LI ,  Chunfa LIU

IPC: H04R7/04 ,  H04R31/00 ,  C08L23/08 ,  C08K5/00

CPC classification number: H04R7/04 ,  H04R31/003 ,  C08L23/0869 ,  C08K5/0025 ,  H04R2207/021 ,  H04R2231/001 ,  C08L2312/00 ,  C08L2203/20

Abstract: A diaphragm applied to a sound producing device, a sound producing device, and a method for assembling the same. The diaphragm comprises a film layer prepared by means of a crosslinking reaction of at least one of an ethylene-acrylate copolymer and an ethylene-acrylate-carboxylic acid copolymer. The molecular structure of the diaphragm comprises a vinyl-acrylic group. The group causes the material to have a less symmetrical chemical structure, a reduced tacticity and an increased steric hindrance, such that the diaphragm has a high loss factor, and the sound producing device achieves a good damping effect.

公开(公告)号：US20230167282A1

公开(公告)日：2023-06-01

申请号：US17995121

申请日：2021-08-24

Applicant: GOERTEK INC.

Inventor： Fuzhen YAN ,  Weichao WANG ,  Chun LI

IPC: C08L9/06 ,  H04R7/02 ,  H04R31/00 ,  C08K3/04 ,  C08K5/17

CPC classification number: C08L9/06 ,  H04R7/02 ,  H04R31/003 ,  C08K3/04 ,  C08K5/17 ,  C08L2312/02 ,  C08K2003/2296

Abstract: Disclosed is a diaphragm and a sound generating device. The raw material of the diaphragm comprises a liquid diene-based rubber and a vulcanizing agent, and the liquid diene-based rubber comprises a liquid butadiene-based rubber or a liquid isoprene-based rubber. The diaphragm is prepared by injecting the raw material into a diaphragm forming mold and then performing a cross-linking reaction. The diaphragm has an elongation at break of more than 200%, therefore the reliability of the diaphragm is high, the diaphragm has a damping of more than 0.07, and the has higher damping in the range of the operating temperature and frequency, therefore the loudspeaker using this diaphragm may obtain lower THD, higher listening yield, better sound quality, and swing during vibration not easily occurs, the listening stability is good, and the diaphragm can also ensure that the defects such as diaphragm folding and diaphragm damage not easily occurs after low temperature reliability.