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Title:
METHOD OF PRODUCING SPEAKER DIAPHRAGM AND SPEAKER DIAPHRAGM FORMED BY THIS METHOD AND SPEAKER USING THIS
Document Type and Number:
WIPO Patent Application WO/1999/065272
Kind Code:
A1
Abstract:
A method of producing a speaker diaphragm used in a variety of acoustic devices and a speaker diaphragm formed by this method and a speaker using this; specifically a method of producing a speaker diaphragm capable of preventing the deformation of a speaker diaphragm otherwise caused by variations in wettability in plasma processing and by heat and being excellent in productivity, and a speaker excellent in input resistance. A high-productivity method of producing a speaker diaphragm comprising the steps of disposing an aluminum-mesh-made etching tunnel (2) on the inner side of a cylindrical quartz reaction tank (1), arranging speaker diaphragms (4) inside the cylinder at preset intervals and disposing opposing electrodes (5) on the outer side of the reaction tank (1), whereby thermal deformation is prevented due to a low-temperature plasma processing and a uniform wettability is ensured by a mesh-made etching tunnel (2); and a speaker enhanced in input resistance by stabilizing an adhesion bonding and increasing a bonding force between the speaker diaphragm (4) and a voice coil (18) and/or an edging (19a) by ensuring a uniform wettability.

Inventors:
Sato, Hitoshi (4141-32, Takachayakomori-cho Tsu-shi Mie, 514-0817, JP)
Mizone, Sinya (1488-107, Issinden Kozubeta Tsu-shi Mie, 514-0061, JP)
Ikeda, Kiyoshi (67-9, Nijigaoka-cho Matsusaka-shi Mie, 515-0042, JP)
Yamazaki, Hiroko (1386-98, Hioka-cho Matsusaka-shi Mie, 515-0835, JP)
Application Number:
PCT/JP1999/003140
Publication Date:
December 16, 1999
Filing Date:
June 11, 1999
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (1006, Oaza Kadoma Kadoma-shi Osaka, 571-8501, JP)
Sato, Hitoshi (4141-32, Takachayakomori-cho Tsu-shi Mie, 514-0817, JP)
Mizone, Sinya (1488-107, Issinden Kozubeta Tsu-shi Mie, 514-0061, JP)
Ikeda, Kiyoshi (67-9, Nijigaoka-cho Matsusaka-shi Mie, 515-0042, JP)
Yamazaki, Hiroko (1386-98, Hioka-cho Matsusaka-shi Mie, 515-0835, JP)
International Classes:
H04R7/02; H04R31/00; (IPC1-7): H04R7/02; H04R31/00
Foreign References:
JPH06225388A
JPH05168093A
Other References:
See also references of EP 1005251A1
Attorney, Agent or Firm:
Iwahashi, Fumio (Matsushita Electric Industrial Co, Ltd. 1006, Oaza Kadoma Kadoma-shi Osaka, 571-8501, JP)
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