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.