Speaker

摘要

A speaker 10 includes: a plurality of piezoelectric diaphragms 11 and 12 each including a substrate and a piezoelectric element provided on at least one surface of the substrate; one or a plurality of connecting members 13 connecting the plurality of piezoelectric diaphragms 11 and 12 to each other such that the plurality of piezoelectric diaphragms 11 and 12 aligned from the piezoelectric diaphragm 11 located at a frontmost side of the speaker 10, in a thickness direction of the piezoelectric diaphragm 11, and the piezoelectric diaphragms 11 and 12 adjacent to each other face each other at an interval; a support member 16 supporting the back-side diaphragm 12 that is a piezoelectric diaphragm at a backmost side of the speaker 10. The plurality of piezoelectric diaphragms 11 and 12 include two piezoelectric diaphragms 11 and 12 having stiffnesses different from each other.

主权项

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.