Patent · US Active

Vibrating diaphragm of sound-producing apparatus and sound-producing apparatus

US12163000B2 · kind B2 · utility

1Cited by

0References

14Claims

0Family size

Assignee

GOERTEK INC. · CN

Inventors

Shuqiang Wang · Nanhu, CN
Fengguang Ling · Shandong, CN
Chun Li · Shandong, CN
Chunfa Liu · Weifang, CN

Key dates

Filing date	Dec 25, 2019
Grant date	Dec 10, 2024
Priority date	—
Expiry date	Jan 1, 2040

Classification

Technology area (CPC H)Electricity
CPC primaryH04R2307/025
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

Disclosed are a vibrating diaphragm of a sound-producing apparatus and the sound-producing apparatus. The vibrating diaphragm includes a polyurethane rubber film layer and the polyurethane rubber film layer includes a block polymer formed by soft segment portions and hard segment portions that are arranged alternately, wherein each of the soft segment portions includes polyhydric alcohol and each of the hard segment portions includes isocyanate and a chain extender, and the polyurethane rubber is represented by a structural formula as follows: wherein R is the chain extender, R1 is polyhydric alcohol and n is a natural number. (FIG. 6).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.