Patent · US Active

Loudspeaker

US8892174B2 · kind B2 · utility

0Cited by

9References

12Claims

0Family size

Assignee

Knowles IPC (M) SDN. BHD. · MY

Inventors

Mathias Weber · Adelsheim, DE
Ewald Frasl · Biedermannsdorf, AT

Key dates

Filing date	Nov 23, 2011
Grant date	Nov 18, 2014
Priority date	—
Expiry date	Nov 23, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH04R9/06
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A loudspeaker comprises a voice coil and a diaphragm attached to the voice coil. The diaphragm has a generally rectangular outer shape, and comprises an outer rim (A1) having an outer edge at which the diaphragm is fixed in position and an inner section (A0) within the outer rim. The inner section (A0) comprises: an outermost area (A00) which is coupled to the voice coil and having the same generally rectangular outer shape; and an inner area (A01) comprising a periodic rib structure (A01p), with the ribs running parallel to the shorter side of the rectangular outer shape, and two lateral transition areas (A01c) between the edges of the periodic rib structure (A01p) and the shorter side edges of outermost area (A00).

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