US 12,317,033 B2
Piezoelectric vibration plate and piezoelectric sound generating component
Yuko Yokoi, Nagaokakyo (JP); Tadashi Okuzawa, Nagaokakyo (JP); and Toshiyuki Sakai, Nagaokakyo (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Nagaokakyo (JP)
Filed by Murata Manufacturing Co., Ltd., Nagaokakyo (JP)
Filed on Jan. 13, 2022, as Appl. No. 17/575,042.
Application 17/575,042 is a continuation of application No. PCT/JP2020/019117, filed on May 13, 2020.
Claims priority of application No. 2019-151732 (JP), filed on Aug. 22, 2019.
Prior Publication US 2022/0141594 A1, May 5, 2022
Int. Cl. H04R 17/00 (2006.01); H04R 7/18 (2006.01)
CPC H04R 17/00 (2013.01) [H04R 7/18 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A piezoelectric vibration plate comprising:
a base that includes a central portion and a circumferential portion that is conductive and is positioned on a periphery of the central portion; and
a piezoelectric member disposed on the central portion,
wherein the central portion is configured to perform a bending vibration in a reciprocating manner in a thickness direction of the base when a voltage is applied to the piezoelectric member,
wherein the base includes at least one penetration portion that is positioned between the central portion and the circumferential portion, and at least one coupling portion that couples the central portion to the circumferential portion, and
wherein the at least one coupling portion is disposed at a farthest position from a center of the central portion at which a maximum displacement is generated in the bending vibration when the voltage is applied to the piezoelectric member.