公开(公告)号：US11051110B2

公开(公告)日：2021-06-29

申请号：US16448008

申请日：2019-06-21

Applicant: DENSO ELECTRONICS CORPORATION

Inventor： Susumu Miyata ,  Koshiro Hayakawa

IPC: H04R7/12 ,  H04R7/18 ,  H04R9/02 ,  H04R9/04 ,  H04R9/06 ,  H04R1/00 ,  H04R1/02 ,  B60Q5/00

Abstract: A sound generator that generates sound by vibrating a diaphragm includes: a housing including a first space opened to the atmosphere by a sound emission hole and a second space separated from the first space by the diaphragm; and a shield plate disposed in the first space to face the diaphragm while being separated from the diaphragm. When the diaphragm is displaced toward the first space by a pressure difference between the first space and the second space, the diaphragm comes in contact with the shield plate to limit deformation of the diaphragm.

公开(公告)号：US11778387B2

公开(公告)日：2023-10-03

申请号：US17404778

申请日：2021-08-17

Applicant: DENSO ELECTRONICS CORPORATION

Inventor： Susumu Miyata

IPC: H04R1/02 ,  H04R9/06 ,  H04R7/12 ,  H04R9/04 ,  H04R31/00

CPC classification number: H04R9/06 ,  H04R1/021 ,  H04R1/023 ,  H04R1/026 ,  H04R7/127 ,  H04R9/046 ,  H04R31/003 ,  H04R2499/13

Abstract: A sound generator includes a sound generating body, a base, a protection wall, and an erected wall. The sound generating body includes a diaphragm and a driving portion. The base includes a base tubular portion and a partition wall defining a sound hole. The diaphragm and the partition wall divide an inner space of the base tubular portion into a first space and a second space. The protection wall is disposed away from the partition wall and the erected wall connects between the protection wall and the base tubular portion. The protection wall, the erected wall, and the partition wall defines a sound emission space in communication with the first space through the sound hole. The protection wall and the erected wall define an emission hole through which the sound exits.