Speaker box

• US 10,375,469 B2
• Filed: 12/28/2017
• Issued: 08/06/2019
• Est. Priority Date: 07/04/2017
• Status: Active Grant

• Current Assignee: AAC Technologies Pte Limited (AAC Technologies Holdings Inc.)
• Original Assignee: AAC Technologies Pte Limited (AAC Technologies Holdings Inc.)
• Inventors: Qin, Peng
• Primary Examiner(s): Ojo, Oyesola C
• Application Number:
  US15/856,830
• Publication Number:
  US 20190014405A1
• Time in Patent Office: 586 Days
• Field of Search: 381150
• CPC Class Codes: H04R 1/023 Screens for loudspeakers
• CPC Class Codes: H04R 1/025 Arrangements for fixing loudspeaker transducers, e.g. in a box, furniture
• CPC Class Codes: H04R 1/2888 for loudspeaker transducers
• CPC Class Codes: H04R 31/00 Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor manufacture of microstructural arrangements of deformable or non-deformable structures in general B81C1/00182

Abstract

A speaker box, includes a housing and a speaker unit accommodated in the housing. The speaker unit includes a diaphragm for forming a front sound cavity cooperatively with the housing. The box further includes a sound transmitting channel communicating the front sound cavity and outside, a front cavity of the speaker box formed by the front sound cavity and the sound transmitting channel, a through hole formed in the housing corresponding to the front cavity, and an elastic cover plate disposed on the housing and covering the through hole. A resonance frequency of the elastic cover plate is greater than a working frequency range of the speaker unit.

Claims

1. A speaker box, including:

a housing;

a speaker unit accommodated in the housing, the speaker unit including a diaphragm for forming a front sound cavity cooperatively with the housing;

a sound transmitting channel communicating the front sound cavity and outside;

a front cavity of the speaker box formed by the front sound cavity and the sound transmitting channel;

a through hole formed in the housing corresponding to the front cavity, the through hole and the diaphragm provided rightly opposite each other;

an elastic cover plate disposed on the housing and covering the through hole, the elastic cover plate provided opposite to the diaphragm and covering the front sound cavity, a resonance frequency of the elastic cover plate being greater than a working frequency range of the speaker unit.

2. The speaker box as described in claim 1, wherein the cover plate is made of alumina or ceramic material.

3. The speaker box as described in claim 1, wherein the housing comprises a lower cover and an upper cover for forming an accommodation space, the speaker unit is fixed in the accommodation space, the diaphragm and the upper plate form the front sound cavity, the sound transmitting channel is formed at the upper cover, the through hole is provided at the upper cover.

4. The speaker box as described in claim 3, wherein the cover plate is embedded in the upper cover.

5. The speaker box as described in claim 4, wherein the cover plate is embedded in the side of the diaphragm far from the upper cover.

6. The speaker box as described in claim 5, wherein the cover plate and the upper cover are formed by integrated injection molding.

7. The speaker box as described in claim 1 further including an adhesive pad affixed outside of the sound guiding channel.