| 摘要 |
PROBLEM TO BE SOLVED: To provide a speaker used by being contacted to cartilage. SOLUTION: A cartilage conduction speaker is composed of two piezoelectric oscillators where a film of PZT (lead zirconate titanate polymer) is formed on both sides of an electrode plate, a spacer keeping the two piezoelectric oscillators parallel with a predetermined interval, and connecting the vicinity of the piezoelectric oscillators, a conducting wire which conducts one of two polar characters of an electric signal to the electrode plate of the piezoelectric oscillator and the other polar to the PZT film part of the piezoelectric oscillator in order to operate the two piezoelectric oscillators reversely, a case fixing one of the two piezoelectric oscillators through an elastic member, and a contact pad contacted to cartilage in the vicinity of a user's ear through the other elastic member of the piezoelectric oscillators. COPYRIGHT: (C)2008,JPO&INPIT
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