EP 1182907 A3 20030618 - Electroacoustic transducer
Title (en)
Electroacoustic transducer
Title (de)
Elektroakustischer Wandler
Title (fr)
Transducteur électro-acoustique
Publication
Application
Priority
JP 2000253584 A 20000824
Abstract (en)
[origin: EP1182907A2] Conductor pattern portions CLa1 and CLb1 are printed on a center portion of a polymeric resin film, and the center portion is folded and then bonded, thereby forming a diaphragm 21 which integrally has a flat plate-like portion 23 having the conductor pattern portions CLa1 and CLb1, and first and second vibrating sections 21a and 21b having a curved shape. A magnet 17 and yokes 18 and 19 form a magnetic circuit and a magnetic gap MG. The flat plate-like portion 23 is inserted into the magnetic gap MG. The whole diaphragm 21 is supported by a support member 20 in a floating state. In this structure, when an audio signal is supplied to the conductor pattern portions CLa1 and CLb1, the flat plate-like portion 23 is vibrated in a direction H by dynamic force generated by the magnetic field in the magnetic gap MG, and currentin the conductor pattern portions CLa1 and CLb1 which are inserted into the magnetic gap MG, and also the first and second vibrating sections 21a and 21b are vibrated in the direction H, so that a reproduced sound of excellent high-frequency characteristics is released. <IMAGE>
IPC 1-7
IPC 8 full level
H04R 7/12 (2006.01); H04R 7/18 (2006.01); H04R 9/00 (2006.01); H04R 9/02 (2006.01); H04R 9/04 (2006.01); H04R 9/06 (2006.01)
CPC (source: EP)
H04R 7/18 (2013.01); H04R 9/045 (2013.01); H04R 9/06 (2013.01); H04R 9/025 (2013.01)
Citation (search report)
- [X] US 4276449 A 19810630 - SAWAFUJI TADASHI
- [A] WO 0041492 A2 20000720 - RONASZEKI FERENC [HU], et al
- [A] WO 9414294 A1 19940623 - LINAEUM CORP [US]
- [A] PATENT ABSTRACTS OF JAPAN vol. 008, no. 059 (E - 232) 17 March 1984 (1984-03-17)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1182907 A2 20020227; EP 1182907 A3 20030618; EP 1182907 B1 20060222; CN 1346230 A 20020424; DE 60117346 D1 20060427; DE 60117346 T2 20061012; JP 2002078079 A 20020315
DOCDB simple family (application)
EP 01307079 A 20010820; CN 01126069 A 20010824; DE 60117346 T 20010820; JP 2000253584 A 20000824