Piezoelectric speaker
First Claim
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1. A piezoelectric speaker which generates sound by vibrating a diaphragm using a piezoelectric driver, comprising:
- a piezoelectric driver that is vibrated in bending mode by piezoelectric effect,a diaphragm, formed by assembling two opposed plane resin foam plates, each having a recess, wherein the pair of recesses make a space, which is to accommodate said piezoelectric driver and which is bigger than said piezoelectric driver,a piezoelectric driver supporting means for supporting the substantial center of said piezoelectric accommodated in the above space, anda frame for supporting said diaphragm without restricting its vibration.
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Abstract
A piezoelectric speaker in which a diaphragm containing a piezoelectric driver is fixed on a frame through an elastic supporting member. The diaphragm is an assembly of two resin foam plates facing each other. Each resin foam plate has a recess and a projecting member at the substantial center of the recess bottom. The piezoelectric driver is accommodated in the space made of the two recesses while being interposed and supported by the projecting members at the substantial center thereof.
136 Citations
21 Claims
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1. A piezoelectric speaker which generates sound by vibrating a diaphragm using a piezoelectric driver, comprising:
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a piezoelectric driver that is vibrated in bending mode by piezoelectric effect, a diaphragm, formed by assembling two opposed plane resin foam plates, each having a recess, wherein the pair of recesses make a space, which is to accommodate said piezoelectric driver and which is bigger than said piezoelectric driver, a piezoelectric driver supporting means for supporting the substantial center of said piezoelectric accommodated in the above space, and a frame for supporting said diaphragm without restricting its vibration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A piezoelectric speaker which generates sound by vibrating a diaphragm using multiple piezoelectric drivers, comprising:
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multiple piezoelectric drivers that are vibrated in bending mode by piezoelectric effect, a diaphragm, formed by assembling two opposed plane resin foam plates, each having multiple recesses, wherein the pairs of recesses make spaces, which are to respectively accommodate said multiple piezoelectric drivers and which are bigger than their respective piezoelectric drivers, piezoelectric driver supporting means for supporting the substantial centers of said piezoelectric drivers respectively accommodated in the above spaces, and a frame for supporting said diaphragm without restricting its vibration. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification