(19)
(11) EP 0 926 924 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
13.04.2005 Bulletin 2005/15

(43) Date of publication A2:
30.06.1999 Bulletin 1999/26

(21) Application number: 98401003.3

(22) Date of filing: 24.04.1998
(51) International Patent Classification (IPC)7: H04R 17/00, H04R 7/12
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 27.12.1997 JP 36813397

(71) Applicant: MURATA MANUFACTURING CO., LTD.
Nagaokakyo-shi Kyoto-fu 226 (JP)

(72) Inventors:
  • Nakamura, Takeshi
    Nagaokakyo-shi, Kyoto-fu (JP)
  • Kaneko, Takayuki
    Nagaokakyo-shi, Kyoto-fu (JP)

(74) Representative: Joly, Jean-Jacques et al
Cabinet Beau de Loménie 158, rue de l'Université
75340 Paris Cédex 07
75340 Paris Cédex 07 (FR)

   


(54) Speaker


(57) The speaker (10) has a semi-spherical vibration section (12) and a ringed plate-like base section (14). The vibration section and the base section are formed as a single, unitary piezoelectric body. Driving electrodes (18, 20) are located on the single unitary body comprising the vivration section and the base section. The driving electrodes are connected with lead electrodes (22, 24) and the lead electrodes are connected with connecting terminals (26, 28).






Search report