SPEAKER DIAPHRAGM AND SPEAKER USING SAME, AND ELECTRONIC EQUIPMENT AND DEVICE USING SAID SPEAKER, AND SPEAKER DIAPHRAGM MANUFACTURING METHOD

Title:

SPEAKER DIAPHRAGM AND SPEAKER USING SAME, AND ELECTRONIC EQUIPMENT AND DEVICE USING SAID SPEAKER, AND SPEAKER DIAPHRAGM MANUFACTURING METHOD

Document Type and Number:

WIPO Patent Application WO/2011/093008

Kind Code:

A1

Abstract:

A diaphragm is constituted by means of a papermaking process and contains a first fibrous material with increased freeness and a second fibrous material with carbonized bamboo fibers scaled down to a microfibril state. By means of such a constitution, the second fibrous material stiffens the diaphragm and increases the internal loss, and increases the sound quality of a speaker using said diaphragm.

Inventors:

KAJIHARA YOSHIMICHI
JIN YOHEI
FUJII TORU

Application Number:

PCT/JP2011/000081

Publication Date:

August 04, 2011

Filing Date:

January 12, 2011

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Assignee:

PANASONIC CORP (JP)
KAJIHARA YOSHIMICHI
JIN YOHEI
FUJII TORU

International Classes:

H04R7/02; D21H11/12; D21H11/18; H04R31/00

Foreign References:

JP2009171386A	2009-07-30
JPS6354100A	1988-03-08

Attorney, Agent or Firm:

NAITO, Hiroki et al. (JP)
Hiroki Naito (JP)

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