Patent ID: 9107005
Filing Date: 2015-08-11
Classification: H04R

Abstract:
1. A speaker comprising: a plurality of piezoelectric diaphragms each including a substrate and a piezoelectric element provided on at least one surface of the substrate, each of the piezoelectric diaphragms having end portions opposite to each other; one or a plurality of connecting members connecting the plurality of piezoelectric diaphragms to each other at the end portions of each of the piezoelectric diaphragms, such that the plurality of piezoelectric diaphragms are aligned from a front-side piezoelectric diaphragm of the piezoelectric diaphragms located at a front-most side of the speaker, in a thickness direction of the front-side piezoelectric diaphragm, and adjacent pairs of the piezoelectric diaphragms face each other at an interval; and a support member supporting a back-side piezoelectric diaphragm of the piezoelectric diaphragms that is at a back-most side of the speaker, wherein the support member is fixed to a central portion of the back-side piezoelectric diaphragm, and the back-side piezoelectric diaphragm has a stiffness that is higher than that of an adjacent one of the piezoelectric diaphragms located toward the front-most side of the speaker.