Patent ID: 9398377
Filing Date: 2016-07-19
CPC Classification: G10K,H04R

Claim Text:
1. A piezoelectric sound generating element comprising a piezoelectric element and a diaphragm to which the piezoelectric element is affixed, the diaphragm having a fixed outer peripheral portion, wherein: the diaphragm has a circular profile; a profile of the piezoelectric element is determined such that any portion of the profile of the piezoelectric element is not parallel with the profile of the diaphragm; the piezoelectric element has an asymmetric octagonal profile; the asymmetric octagonal profile has a pair of long side portions opposing each other, a pair of short side portions opposing each other in a direction orthogonal to the direction in which the pair of long side portions are opposing each other, and four connecting side portions that are shorter than the long side portions and the short side portions and that connect the long side portions and the short side portions; the pair of long side portions extend in non-parallel with each other, and the pair of short side portions extend in parallel with each other; the pair of long side portions are shaped to be curved convexly toward the profile of the diaphragm; the four connecting side portions have a straight shape; and the four connecting side portions are equal in length, each pair of the connecting side portions opposing each other are equal in length, or each pair of the connecting side portions opposing each other are different in length.