Speaker box

• US 10,334,354 B2
• Filed: 12/28/2017
• Issued: 06/25/2019
• 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): Le, Huyen D
• Application Number:
  US15/856,855
• Publication Number:
  US 20190014406A1
• Time in Patent Office: 544 Days
• Field of Search: 381338, 381345, 381350, 381351, 381353, 381354, 381357, 381386, 381391, 381189, 181145, 181155, 181156, 181199, 379430
• CPC Class Codes: H04R 1/021 incorporating only one transducer
• 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 1/2803 for loudspeaker transducers
• CPC Class Codes: H04R 1/2811 for loudspeaker transducers
• CPC Class Codes: H04R 1/288 for loudspeaker transducers
• CPC Class Codes: H04R 1/2888 for loudspeaker transducers
• CPC Class Codes: H04R 1/345 for loudspeakers
• CPC Class Codes: H04R 2499/11 Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
• CPC Class Codes: H04R 29/001 for loudspeakers H04R29/007 takes precedence
• CPC Class Codes: H04R 31/003 for diaphragms or their outer suspension
• CPC Class Codes: H04R 9/06 Loudspeakers

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. A sound transmitting channel communicates the front sound cavity with the outside for forming a front cavity of the speaker box. A through hole is formed at a position on the housing corresponding to the front cavity. The speaker box further includes an elastic cover plate provided on a side of the housing close to the diaphragm for covering the through hole and for absorbing vibration energy at a specific resonance frequency. A Young'"'"'s modulus or strength of the elastic cover plate is smaller than that of the housing.

Claims

1. A speaker box, comprising:

a housing, the housing comprises a lower plate and an upper plate for forming an accommodation space with the lower plate;

a speaker unit fixed in the accommodation space, the speaker unit includes a diaphragm, the diaphragm and the upper plate form a front sound cavity;

a sound transmitting channel communicating the front sound cavity with the outside for forming a front cavity of the speaker box, the sound transmitting channel is formed at the upper plate;

a through hole provided at the upper plate corresponding to the front cavity;

an elastic cover plate fixed on the surface of the upper plate opposite the diaphragm for covering the through hole and for absorbing vibration energy in the front cavity at a specific resonance frequency;

wherein

a Young'"'"'s modulus or strength of the elastic cover plate is smaller than that of the housing;

a gap is provided between the elastic cover plate and the upper plate.

2. The speaker box as described in claim 1, wherein a groove is formed in a surface of the upper plate opposite to the diaphragm sinking toward a direction far away from the diaphragm for communicating with the through hole, the elastic cover plate is fixed on the surface of the upper plate facing the diaphragm and covers the groove.

3. The speaker box as described in claim 2, wherein the elastic cover plate and the upper plate are fixedly connected by double-shot molding or hot pressing or pasting or ultrasonic welding.

4. The speaker box as described in claim 1, wherein the specific frequency is 500˜

15000 Hz.

5. The speaker box as described in claim 4, wherein the specific frequency is 3000˜

9000 Hz.

6. The speaker box as described in claim 1, wherein the elastic cover plate is made of TPU or silica gel.