Title:
SPEAKER, SPEAKER MODULE, AND ELECTRONIC EQUIPMENT USING THE SPEAKER MODULE
Document Type and Number:
WIPO Patent Application WO/2003/028404
Kind Code:
A1
Abstract:
A speaker, a speaker module, and electronic equipment using the speaker module, the speaker comprising a closed box (31) having a second diaphragm disposed at an open face and at least one sounding body (40) acoustically connected to the closed box, the sounding body further comprising a first diaphragm (27), characterized in that the area of the second diaphragm is larger than the area of the first diaphragm, whereby the shape of the closed box and the positions and shapes of the first and second diaphragms can be designed arbitrarily and, accordingly, a reduction in size and freedom degree in design of the electronic equipment can be realized while preventing a sound pressure generated from the speaker from lowering by using the large diaphragm.
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Inventors:
KONISHI SHUHEI (JP)
ANDO KIMIHIRO (JP)
ANDO KIMIHIRO (JP)
Application Number:
PCT/JP2002/009926
Publication Date:
April 03, 2003
Filing Date:
September 26, 2002
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
KONISHI SHUHEI (JP)
ANDO KIMIHIRO (JP)
KONISHI SHUHEI (JP)
ANDO KIMIHIRO (JP)
International Classes:
H04M1/03; H04R1/28; H04R7/04; H04R9/06; (IPC1-7): H04R1/28; H04R9/10; H04M1/02; H04M1/03
Foreign References:
| JPS62186584U | 1987-11-27 | |||
| JPS58127779U | 1983-08-30 | |||
| JPH01159487U | 1989-11-06 | |||
| JPS5741392U | 1982-03-05 | |||
| JPS56160086U | 1981-11-28 | |||
| JPH0334391U | 1991-04-04 | |||
| JPS572790U | 1982-01-08 | |||
| JPS55135591U | 1980-09-26 | |||
| JPH06177809A | 1994-06-24 |
Other References:
See also references of EP 1343349A4
None
None
Attorney, Agent or Firm:
Iwahashi, Fumio c/o Matsushita Electric Industrial Co. (Ltd. 1006 Oaza Kadoma Kadoma-shi, Osaka, JP)
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