Electroacoustic device and mobile terminal

Patent metadata

Field	Value
Publication number	US-10440479-B2
Application number	US-201815998978-A
Country	US
Kind code	B2
Filing date	Aug 17, 2018
Priority date	Sep 8, 2017
Publication date	Oct 8, 2019
Grant date	Oct 8, 2019

Abstract

An electroacoustic device and a mobile terminal are provided. The electroacoustic device may include a box defining an opening; an electroacoustic component including a frame, a vibrating membrane and a driving assembly, whet the frame is installed inside the box, the vibrating membrane is assembled on the thine and covers the opening, the frame and the vibrating membrane define a chamber, the driving assembly is configured to drive the vibrating membrane to vibrate, and the frame defines a leaking channel, and partition nets set inside the box, wherein a space between the electroacoustic component and the box is divided into cavities by the partition nets, at least one cavity is filled with sound absorption material, and the cavities are communicated with the chamber through the leaking channel.

First claim

What is claimed is:

1. An electroacoustic device, comprising:
a box defining an opening;
an electroacoustic component comprising:
a frame installed inside the box and defining a leaking channel passing through the frame;
a vibrating membrane assembled on the frame and covering the opening, wherein the frame and the vibrating membrane cooperatively define a chamber communicated with the leaking channel; and
a driving assembly disposed in the chamber and configured to drive the vibrating membrane to vibrate; and

a plurality of partition nets set inside the box and outside the chamber, wherein a space between the frame and the box is divided into a plurality of cavities by the plurality of partition nets, at least one or the plurality of cavities is filled with sound absorption material, each of the plurality of partition nets defines a plurality of net holes, and the plurality of cavities are communicated with the chamber through the leaking channel.

2. The electroacoustic device of claim 1 , wherein
the plurality of partition nets comprises a first partition net and at least one second partition net, the first partitions net is closer to the frame compared with the at least one second partition net;
the first partition net coats the frame, or the first partition net is spaced apart from the frame.

3. The electroacoustic device of claim 1 , wherein
a size of each of the plurality of net holes of one of the plurality of partition nets closer to the frame is larger than a size of each of the plurality of net holes of other ones of the plurality of partition nets farther from the frame; and
a particle size of the sound absorption material filled in one of the plurality of cavities closer to the frame is larger than a particle size of the sound absorption material filled in other ones of the plurality of cavities farther from the frame.

4. The electroacoustic device of claim 1 , wherein
each of the plurality of partition nets comprises a support and a plurality of bars, wherein the support and the plurality of bars cooperatively define the plurality of net holes, and a distance between each two adjacent ones of the plurality of bars is smaller than a particle size of the sound absorption material in adjacent one of the plurality of cavities to prevent the sound absorption material from passing through the plurality of net holes.

5. The electroacoustic device of claim 4 , wherein
an extending direction of the plurality of bars of the plurality of partition nets are substantially the same.

6. The electroacoustic device of claim 1 , wherein
each of the plurality of partition nets has a plate configuration, and the plurality of partition nets are spaced apart from each other and arranged in parallel from the frame to the box.

7. The electroacoustic device of claim 1 , wherein
the plurality of cavities have different volumes.

8. The electroacoustic device of claim 1 , wherein
different ones of the plurality of cavities are filled with different types of sound absorption material.

9. The electroacoustic device of claim 1 , wherein
different ones of the plurality of cavities are filled with sound absorption material with different particle sizes.

10. The electroacoustic device of claim 1 , wherein
the frame comprises a side wall and a bottom all the bottom wall is connected to the box, and the leaking channel is set on the side wall.

11. The electroacoustic device of claim 10 , wherein
the driving assembly comprises a first driving component connected to the vibrating membrane and a second driving component connected to the frame, and the second driving component is configured to drive the first driving component to vibrate so as to drive the vibrating membrane to vibrate.

12. The electroacoustic device of claim 11 , wherein
the first driving component is a coil, the second driving component is a magnet and comprises a first part and a second part, the fist part is Connected to the bottom wall of the frame, the second part is disposed around the first part and spaced apart from the first part to form a magnetic gap, the first driving component extends from the vibrating membrane into the magnetic gap;
wherein
the second part is clung to the side wall of the frame, the second part defines a through hole which is aligned and communicated with the leaking channel; or
the second part is spaced apart from the side wall of the frame, an end of the second part is connected to the bottom wall of the frame and another end of the second part is spaced apart from the vibrating membrane.

13. An electroacoustic device, comprising:
a box having a bottom wall, a top wall and a side wall, wherein the top wall defines an opening;
a vibrating membrane connected to the top wall of the box and covering the opening;
a frame installed on the bottom all of the box, wherein the frame, the bottom wall of the box and the vibrating membrane cooperatively define a chamber, and the frame defines a leaking channel communicated with the chamber;
a driving assembly installed in the chamber and configured to drive the vibrating membrane to vibrate; and
a plurality of partition nets set inside the box and outside the chamber, wherein the plurality of partition nets, the top wall, the bottom wall and the side wall cooperatively define a plurality of cavities, at least one of the plurality of cavities is filled with sound absorption material, each of the plurality of partition nets defines a plurality of net holes, each of the plurality of net holes of each of the plurality of partition nets is small enough to prevent the sound absorption material from passing through the plurality of net holes, and the plurality of cavities are communicated with the chamber through the leaking channel.

14. The electroacoustic device of claim 13 , wherein
a size of each of the plurality of net holes of one of the plurality of partition nets closer to the frame is larger than a size of each of the plurality of net holes of other ones of the plurality of partition nets farther from the frame; and
a particle sire of the sound absorption material in one of the plurality of cavities closer to the frame is larger than a particle size of the sound absorption material in other ones of the plurality of cavities farther from the frame.

15. The electroacoustic device of claim 13 , wherein
each of the plurality of partition nets comprises a support and a plurality of bars, wherein the support and the plurality of bars cooperatively define the plurality of net holes, and a distance between each two adjacent one of the plurality of bars is smaller than a particle size of the sound absorption material in the adjacent one of the plurality of cavities to prevent the sound absorption material from passing through the plurality of net holes; and
an extending direction of the plurality of bars of the plurality of partition nets are substantially the same.

16. The electroacoustic device of claim 15 , wherein
each of the plurality of partition nets has a plate configuration, and the plurality of partition nets are spaced apart from each other and arranged in parallel from the frame to the side wall of the box.

17. The electroacoustic device of claim 13 , wherein
the plurality of cavities have different volumes; or
different ones of the plurality of cavities are filled with different types of sound absorption material; or
different ones of the plurality of cavities are filled with sound absorption material with different particle sizes.

18. The electroacoustic device of claim 13 , where

Assignees

• Guangdong Oppo Mobile Telecommunications Corp Ltd

Inventors

• Yan Bixiang

Classifications

• H04R2201/029

  Manufacturing aspects of enclosures transducers · CPC title

• H04R9/025

  Magnetic circuit · CPC title

• H04R9/06

  Loudspeakers · CPC title

• H04R2499/11

  Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's · CPC title

• H04R9/063 Primary

  using a plurality of acoustic drivers (H04R1/24 and H04R1/403 take precedence) · CPC title