Piezoelectric sound generator and method of its manufacture

Details Piezoelectric sound generator and method of its manufacture Piezoelectric sound generator and method of its manufacture

H - Electricity

04

M

H04M 1/03 (2006.01) H04R 17/00 (2006.01)

Patent

CA 2066262

A piezoelectric sound generator includes a piezoelectric device consisting of a metal diaphragm and a piezoelectric porcelain plate affixed to the diaphragm, a pair of connecting members having resistors connected to the piezoelectric device in series, a leakage magnetic flux coil connected in parallel to the piezoelectric device and the resistors in series, and a resin case. The resin case encases the piezoelectric device and containing the resistors, and has a spool for retaining the leakage magnetic flux coil. In addition, the resin case embraces a portion of the connecting members. This piezoelectric sound generator is manufactured by the steps of: soldering the resistors to the connecting members; forming the resin case in an insertion mold into which the connecting members have been placed, whereby a portion of the connecting members is embraced by the resin case; and attaching the piezoelectric device and the coil to the resin case. The sound generator thus obtained is so accommodated by a handset having sound emission holes that a cavity is defined by the piezoelectric device, the resin case and the handset.

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