Piezoelectric electroacoustic transducer and manufacturing...

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Electrostrictive – magnetostrictive – or piezoelectric

Reexamination Certificate

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Details

C381S162000, C381S386000, C381S173000, C381S433000, C310S322000, C310S348000

Reexamination Certificate

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07020295

ABSTRACT:
A piezoelectric electroacoustic transducer includes a substantially rectangular piezoelectric diaphragm having electrodes and flexurally vibrating in response to application of an alternating signal between the electrodes, a resin case having a supporting member disposed inside sidewalls of the case for supporting the diaphragm, terminals insert-molded in the case so as to have internal connections exposed in the supporting member and external connections exposed on the external surface of the case, a conductive adhesive for electrically connecting the electrodes of the diaphragm to the internal connections of the terminals, an elastic sealant for sealing a gap between the external periphery of the diaphragm and the internal periphery of the case, and a lid plate for closing an opening of the case. The terminals are pressed terminals, which are made by punching a metallic plate so that a flash-producing surface is to be the lower surface, and flashes on both respective side-edges of the internal connections are embedded inside the supporting member of the case so that the top surfaces of the internal connections are flush with the surface of the supporting member, and the external connections of the terminals are bent toward the bottom surface of the case via the side surfaces thereof.

REFERENCES:
patent: 5770915 (1998-06-01), Sumita et al.
patent: 6445108 (2002-09-01), Takeshima et al.
patent: 6570299 (2003-05-01), Takeshima et al.
patent: 6587567 (2003-07-01), Yamamoto
patent: 2001/0004180 (2001-06-01), Kishimoto
patent: 100 07 455 (2000-09-01), None
patent: 2-148815 (1990-06-01), None
patent: 6-342864 (1994-12-01), None
patent: 2000-310990 (2000-11-01), None
patent: 2000-312398 (2000-11-01), None
patent: 2001-95094 (2001-04-01), None
patent: 2001-0062423 (2001-07-01), None
English translation of the Notice of Submission of Argument Issued in a Korean Application Number 10-2002-0038557 and dated Feb. 24, 2005.

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