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Patent Searching and Data


Title:
SPEAKER OSCILLATION STRUCTURE AND ITS MANUFACTURE
Document Type and Number:
Japanese Patent JPS59188296
Kind Code:
A
Abstract:

PURPOSE: To obtain simultaneously low density, a high Young's modulus, and high internal loss by composing a constitution member which includes a diaphragm part of a silicon carbide-carbon composite material which has carbon in a matrix containing SiC as a principal component.

CONSTITUTION: The diaphragm 1 and the constitution member of a voice coil bobbin 2 are formed in one body of the silicon carbide-carbon composite material which has fibrous, granular, or filmy carbon in the matrix containing SiC as a principal component. Then, the bobbin 2 is wound with a voice coil 3. Therefore, the need to adhere the diaphragm 1 and voice coil bobbin 2 together by an adhesive is eliminated, so a decrease in reproduction characteristics due to the adhesive having a low Young's modulus in general is evaded.


Inventors:
OKAMURA KIYOTO
HASEGAWA YOSHIO
KUROO YOSHIYASU
KANEDA YORIAKI
Application Number:
JP1983000062775
Publication Date:
October 25, 1984
Filing Date:
April 08, 1983
Export Citation:
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Assignee:
TOKUSHU MUKI ZAIRYO KENKYUSHO
SONY CORP
International Classes:
H04R7/02; H04R7/12; H04R31/00; (IPC1-7): H04R7/02; H04R31/00
Domestic Patent References:
JPS56111397A1981-09-03
JPS4812723A
JPS5575395A1980-06-06