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Patent Searching and Data


Title:
DIAPHRAGM FOR SPEAKER, MANUFACTURING METHOD THEREOF, ACOUSTIC EQUIPMENT USING DIAPHRAGM FOR SPEAKER, AND MOVING APPARATUS
Document Type and Number:
Japanese Patent JP2018037918
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a diaphragm for speaker capable of achieving a speaker of a high sound pressure with satisfactory waterproof performance with a weight lighter than conventional diaphragms for speaker impregnated with waterproof liquid.SOLUTION: The diaphragm for speaker is constituted of multiple layered structure including a rear face layer (41) and a surface layer (42). The rear face layer (41) is formed of a cellulose paper material beaten cellulosic paper material of about 13 μm with a waterproofing agent adsorbed. The surface layer (42) is formed of a cellulose fiber material.SELECTED DRAWING: Figure 4

Inventors:
KAJIWARA YOSHIMICHI
MIYAMOTO TAKUJI
Application Number:
JP2016170437A
Publication Date:
March 08, 2018
Filing Date:
September 01, 2016
Export Citation:
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Assignee:
PANASONIC IP MANAGEMENT CORP
International Classes:
H04R7/02; H04R31/00
Attorney, Agent or Firm:
特許業務法人森本国際特許事務所