Title:
RESIN SPEAKER DIAPHRAGM AND SPEAKER USING IT
Document Type and Number:
Japanese Patent JP2003259483
Kind Code:
A
Abstract:
To provide a speaker used for various audio devices and a resin speaker diaphragm which can be emphasized visually and is excellent in preventing deterioration of sound quality and an increase in cost.
This resin speaker diaphragm has fine grooves 2b with the same pitch of 0.7 to 2 μm on its surface. Light is separated by diffraction, and iridescent reflected light is obtained. This makes is possible to visually emphasize the diaphragm without pasting a hologram sheet on it, prevent an increase in weight caused by pasting the hologram sheet or deterioration of sound quality, and provide the speaker and diaphragm at a low cost.
Inventors:
TABATA SHINYA
MIZONE SHINYA
DOI TERUO
TOKUMORI MASASHI
ENOMOTO TAKEHIRO
MIZONE SHINYA
DOI TERUO
TOKUMORI MASASHI
ENOMOTO TAKEHIRO
Application Number:
JP2002052753A
Publication Date:
September 12, 2003
Filing Date:
February 28, 2002
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
H04R7/02; H04R7/14; (IPC1-7): H04R7/02; H04R7/14
Attorney, Agent or Firm:
Fumio Iwahashi (2 others)