Acoustic device and electronic equipment

Patent metadata

Field	Value
Publication number	US-12088997-B2
Application number	US-201917622937-A
Country	US
Kind code	B2
Filing date	Dec 24, 2019
Priority date	Jun 27, 2019
Publication date	Sep 10, 2024
Grant date	Sep 10, 2024

Abstract

Disclosed by the present invention is an acoustic device, comprising a sound generating unit. A first sealed cavity is formed at the rear side of a vibrating diaphragm of the sound generating unit, a mounting hole is provided on a cavity wall of the first sealed cavity, and a flexible deformation part is provided on the mounting hole. A second sealed cavity is formed at the outer side of the first sealed cavity, and the second sealed cavity encloses the sound wave generated during deformation of the flexible deformation part therein. The mounting hole is located on the first wall, and a groove is provided on the first wall at the periphery of the mounting hole towards the first sealed cavity. The flexible deformation part is fixed on the bottom of the groove, and a through groove is further provided on the first wall.

First claim

The invention claimed is:

1. An acoustic device, comprising a sound generating unit, the sound generating unit comprises a vibrating diaphragm, the acoustic device is provided with a sound outlet, and a sound wave at a front side of the vibrating diaphragm radiates to outside through the sound outlet,
wherein a first sealed cavity is formed at a rear side of the vibrating diaphragm, a cavity wall of the first sealed cavity is provided with a mounting hole, a flexible deformation part is provided at the mounting hole, a second sealed cavity is provided at an outer side the first sealed cavity, the flexible deformation part is located between the first sealed cavity and the second sealed cavity, and the second sealed cavity seals a sound wave, which is generated by the flexible deformation part during deformation, in the second sealed cavity, and
wherein the cavity wall comprises a first wall and a second wall connected with the first wall, the mounting hole is located at the first wall, a recess formed by recessing towards the first sealed cavity is provided at the first wall around the mounting hole, the flexible deformation part is fixed at a bottom of the recess, a through groove formed by recessing towards the first sealed cavity is further provided at the first wall, the through groove passes through the recess and an outer surface of the second wall, and sound wave generated by vibration of the flexible deformation part is transmitted to the second sealed cavity through the through groove,
wherein the acoustic device comprises a first housing, the sound generating unit is mounted on the first housing to form a sound generating assembly, the first sealed cavity is formed between the vibrating diaphragm of the sound generating unit and the first housing, the first housing is provided with the mounting hole, and the flexible deformation part is provided at the mounting hole, and
wherein the acoustic device comprises a second housing, the sound generating assembly is mounted in the second housing, the second sealed cavity is formed between the second housing and the first housing, and the second housing is a housing of an electronic apparatus,
wherein the sound outlet is provided at a side wall of the second housing, and the side wall extends in a vertical direction,
wherein the second sealed cavity isolates sound radiation generated by the flexible deformation part during the deformation, and encloses radiated sound wave of the flexible deformation part in the acoustic device, to avoid offset effect on forward radiated sound wave of the sound generating unit due to anti-phase radiated sound wave of the flexible deformation part, and
wherein the sound generating unit is not overlapped with the flexible deformation part and the sound outlet in the vertical direction.

2. The acoustic device according to claim 1 , wherein the flexible deformation part comprises a body part, and the body part has a flat plate structure, or at least an edge portion of the body part is provided with a protrusion, or at least an edge portion of the body part has a wavy structure.

3. The acoustic device according to claim 2 , wherein the edge portion of the body part is provided with one protrusion, and the protrusion protrudes from the first sealed cavity towards the second sealed cavity, or the protrusion protrudes from the second sealed cavity towards the first sealed cavity.

4. The acoustic device according to claim 2 , wherein the flexible deformation part further comprises a composite sheet combined with the body part at a central position of the body part, and the body part has a sheet overall structure or the central position of the body part is hollowed out.

5. The acoustic device according to claim 2 , wherein the body part of the flexible deformation part has a single-layer structure, and the single-layer structure is made of one of polymer plastic, thermoplastic elastomer and silicone rubber, or
the body part of the flexible deformation part has a multi-layer structure, and at least one layer in the multi-layer structure is made of one of polymer plastic, thermoplastic elastomer and silicone rubber.

6. The acoustic device according to claim 1 , wherein a volume of the second sealed cavity is larger than a volume of the first sealed cavity, and
at least a portion of the housing of the electronic apparatus for mounting the acoustic device is used to form the first sealed cavity and/or the second sealed cavity.

7. The acoustic device according to claim 1 , wherein the first housing comprises a top wall, a bottom wall and a side wall connected between the top wall and the bottom wall, wherein the top wall or the bottom wall is the first wall, and the side wall is the second wall.

8. The acoustic device according to claim 1 , wherein the first housing is provided with a plurality of mounting holes, and each of the mounting holes is provided with a flexible deformation part thereon.

9. An electronic apparatus, comprising a housing of the electronic apparatus and the acoustic device according to claim 1 .

Assignees

• Goertek Inc

Inventors

• Xu Tongyan
• Guo Xiang

Classifications

• H04R9/06 Primary

  Loudspeakers · CPC title

• H04R7/12

  Non-planar diaphragms or cones · CPC title

• H04R1/025

  Arrangements for fixing loudspeaker transducers, e.g. in a box, furniture · CPC title

• H04R2307/023

  Diaphragms comprising ceramic-like materials, e.g. pure ceramic, glass, boride, nitride, carbide, mica and carbon materials · CPC title

• H04R2307/025

  Diaphragms comprising polymeric materials · CPC title