Patent ID: 11950070
Assignee: AAC KAITAI TECHNOLOGIES (WUHAN) CO., LTD
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
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.