US 11,950,070 B2
Sound production device
Qiang Dan, Shenzhen (CN); Yu Shen, Shenzhen (CN); Shiyang Cheng, Shenzhen (CN); Yiwei Zhou, Shenzhen (CN); and Yang Li, Shenzhen (CN)
Assigned to AAC KAITAI TECHNOLOGIES (WUHAN) CO., LTD, Wuhan (CN)
Filed by AAC Kaitai Technologies (Wuhan) CO., LTD, Hubei (CN)
Filed on Jul. 27, 2022, as Appl. No. 17/875,390.
Claims priority of application No. 202111674508.6 (CN), filed on Dec. 31, 2021.
Prior Publication US 2023/0217174 A1, Jul. 6, 2023
Int. Cl. H04R 7/06 (2006.01); G10K 9/22 (2006.01); H04R 7/10 (2006.01); H04R 9/02 (2006.01); H04R 19/00 (2006.01); H10N 30/20 (2023.01)
CPC H04R 7/06 (2013.01) [H04R 9/02 (2013.01); G10K 9/22 (2013.01); H04R 7/10 (2013.01); H04R 19/005 (2013.01); H10N 30/2042 (2023.02)] 6 Claims
OG exemplary drawing
 
1. A sound production device comprising:
a substrate having a cavity;
a plurality of cantilever diaphragms;
at least one first dielectric elastomer actuator;
at least one second dielectric elastomer actuator; and
a flexible connector;
wherein the plurality of cantilever diaphragms are fixed on the substrate, each of the plurality of the cantilever diaphragms comprises a fixed end fixed on the substrate and a free end extending from the fixed end to a position suspended over the cavity, the free end comprises a first surface and a second surface where the first surface is opposite to the second surface, the free end is spaced with the substrate or one other the free end to form a gap; the at least one first dielectric elastomer actuator is disposed on the first surface; the at least one second dielectric elastomer actuator is disposed on the second surface; and the flexible connector is fixed on a periphery of the gap to completely cover the gap;
wherein each of the plurality of the cantilever diaphragms is made of metal or a polymer compound; when the cantilever diaphragms is made of a polymer compound, the at least one first dielectric elastomer actuator comprises a first electrode layer, a first dielectric elastomer film, and a second electrode layer sequentially stacked on the first surface; the at least one second dielectric elastomer actuator comprises a third electrode layer, a second dielectric elastomer film, and a fourth electrode layer sequentially stacked on the second surface;
when the cantilever diaphragms is made of a conductive metal material, the at least one first dielectric elastomer actuator comprises a first dielectric elastomer film and a second electrode layer sequentially stacked on the first surface; the at least one second dielectric elastomer actuator comprises a second dielectric elastomer film and a fourth electrode layer sequentially stacked on the second surface;
and the first dielectric elastomer film and the second dielectric elastomer film are made of polymer compound;
the flexible connector is integrally formed with the first dielectric elastomer film of the at least one first dielectric elastomer actuator; each of the second dielectric elastomer film of the at least one second dielectric elastomer actuator is interconnected to form an integral structure.