US 12,089,022 B2
Panel-type speaker
Shizuka Ishigaki, Kobe (JP); Hironori Shiroto, Kobe (JP); and Yutaka Matsunami, Kobe (JP)
Assigned to DENSO TEN Limited, Kobe (JP)
Filed by DENSO TEN Limited, Kobe (JP)
Filed on Jun. 22, 2023, as Appl. No. 18/339,643.
Application 18/339,643 is a division of application No. 17/485,929, filed on Sep. 27, 2021, abandoned.
Claims priority of application No. 2021-086808 (JP), filed on May 24, 2021; and application No. 2021-134511 (JP), filed on Aug. 20, 2021.
Prior Publication US 2023/0336917 A1, Oct. 19, 2023
Int. Cl. H04R 3/00 (2006.01); H04R 1/22 (2006.01); H04R 7/04 (2006.01); H04R 17/10 (2006.01)
CPC H04R 7/045 (2013.01) [H04R 1/22 (2013.01); H04R 3/007 (2013.01); H04R 17/10 (2013.01); H04R 2440/05 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A panel-type speaker which comprises:
an actuator including (i) a vibrating plate and (ii) a piezoelectric element that is arranged on at least one surface of the vibrating plate and is capable of causing a bending vibration to the vibrating plate;
a panel capable of outputting sound waves by being vibrated by the actuator;
a vibration transmission unit that has one end connected to the panel and another end connected to the actuator and is configured to transmit a vibration of the actuator to the panel;
a spacer configured to hold the actuator by sandwiching the actuator between the spacer and the vibration transmission unit; and
fastening members for fastening the spacer to the vibration transmission unit,
wherein the spacer has a contacting surface with the vibrating plate, the contacting surface having a shape in which, in a plan view of the vibrating plate, (i) a length of the contacting surface in a direction along a propagating direction of a bending vibration propagating in a plane of the vibrating plate is longer than (ii) a length of the contacting surface in a direction along a direction orthogonal to the propagating direction, and
wherein the spacer is fastened to the vibration transmission unit by the fastening members in at least two locations along the propagating direction.