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公开(公告)号：US20200045475A1
公开(公告)日：2020-02-06
申请号：US16499553
申请日：2018-03-29
发明人： Masahide Tamura , Tadao Sunahara , Koji Hamada , Ryuta Suzuki
摘要： A piezoelectric sounding element includes a diaphragm made of metal and a piezoelectric element provided on at least one surface of the diaphragm. A non-fixed portion of the diaphragm includes the pair of long sides facing each other, a pair of short sides, shorter than the long sides, that face each other, and a pair of recesses, provided in the pair of long sides, that protrude so as to approach each other. The piezoelectric element is provided in a region between the pair of recesses of the diaphragm and the contour shapes of the non-fixed portion of the diaphragm and the piezoelectric element are defined so as to be symmetric with respect to a first imaginary line that bisects the pair of short sides and symmetric with respect to a second imaginary line that bisects the pair of long sides.
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公开(公告)号：US10856086B2
公开(公告)日：2020-12-01
申请号：US16499553
申请日：2018-03-29
发明人： Masahide Tamura , Tadao Sunahara , Koji Hamada , Ryuta Suzuki
摘要： A piezoelectric sounding element includes a diaphragm made of metal and a piezoelectric element provided on at least one surface of the diaphragm. A non-fixed portion of the diaphragm includes the pair of long sides facing each other, a pair of short sides, shorter than the long sides, that face each other, and a pair of recesses, provided in the pair of long sides, that protrude so as to approach each other. The piezoelectric element is provided in a region between the pair of recesses of the diaphragm and the contour shapes of the non-fixed portion of the diaphragm and the piezoelectric element are defined so as to be symmetric with respect to a first imaginary line that bisects the pair of short sides and symmetric with respect to a second imaginary line that bisects the pair of long sides.
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