Electro-acoustic conversion device and terminal

Patent metadata

Field	Value
Publication number	US-10863293-B2
Application number	US-201916674865-A
Country	US
Kind code	B2
Filing date	Nov 5, 2019
Priority date	May 24, 2017
Publication date	Dec 8, 2020
Grant date	Dec 8, 2020

Abstract

The present disclosure discloses an electro-acoustic conversion device and a terminal. The electro-acoustic conversion device includes a housing, an electro-acoustic component, and a vibration element. The housing is provided with a sound chamber and a sound outlet communicating with the sound chamber. The electro-acoustic component is arranged in the sound chamber. The vibration element is fixed to the housing and configured to generate sound waves to atomize liquid in the sound chamber, so that the atomized liquid is discharged outside the sound chamber through the sound outlet.

First claim

What is claimed is:

1. An electro-acoustic conversion device, comprising:
a housing provided with a sound chamber and a sound outlet communicating with the sound chamber;
an electro-acoustic component arranged in the sound chamber; and
a vibration element fixed to the housing and configured to generate sound waves to atomize liquid entering the sound chamber, to discharge the atomized liquid outside the sound chamber through the sound outlet.

2. The electro-acoustic conversion device of claim 1 , wherein the vibration element is further configured to drive the housing to vibrate together when the vibration element vibrates.

3. The electro-acoustic conversion device of claim 2 , wherein the sound chamber comprises a rear sound chamber and a front sound chamber communicating with the rear sound chamber, wherein the electro-acoustic component is housed in the rear sound chamber, and the sound outlet communicates with the front sound chamber.

4. The electro-acoustic conversion device of claim 3 , wherein the housing comprises a rear housing and a front housing, wherein the rear housing is connected to the front housing, the rear housing encloses the rear sound chamber, and the front housing encloses the front sound chamber; the electro-acoustic component is arranged in the rear housing, and the vibration element is fixed to the front housing.

5. The electro-acoustic conversion device of claim 4 , wherein the front housing comprises a vibration sheet opposite to a sound emitting side of the electro-acoustic component, wherein the vibration element is fixed to the vibration sheet.

6. The electro-acoustic conversion device of claim 5 , wherein the vibration element is a piezoelectric ceramic piece.

7. The electro-acoustic conversion device of claim 6 , wherein the vibration sheet is a steel sheet.

8. The electro-acoustic conversion device of claim 4 , wherein the vibration element is located within the front sound chamber or outside the front sound chamber.

9. The electro-acoustic conversion device of claim 4 , wherein the sound outlet is formed by a common definition of the front housing and the rear housing.

10. The electro-acoustic conversion device of claim 2 , wherein high-frequency sound waves having frequency greater than 6000 Hz are generated during the vibration of the vibration element and the housing; and
ultrasonic waves having frequency of 20000 Hz or more are generated during the vibration of the vibration element and the housing.

11. A terminal comprising:
a casing provided with at least one speaker hole; and
an electro-acoustic conversion device arranged in the casing, the electro-acoustic conversion device comprising:
a housing provided with a sound chamber and a sound outlet communicating with the sound chamber, wherein the sound outlet is in communication with the speaker hole;
an electro-acoustic component arranged in the sound chamber; and
a vibration element fixed to the housing and configured to generate sound waves to atomize liquid entering the sound chamber, to discharge the atomized liquid outside the sound chamber through the sound outlet.

12. The terminal of claim 11 , wherein the terminal comprises:
a detection module configured to detect whether there is liquid in the sound chamber; and
a processor configured to control the vibration element to vibrate to generate sound waves in response to a determination that there is liquid in the sound chamber, to atomize the liquid in the sound chamber.

13. The terminal of claim 12 , wherein the detection module is configured to detect an impedance curve of the electro-acoustic component, determine whether the impedance curve matches a preset impedance curve, and determine that there is liquid in the sound chamber in response to a determination that the impedance curve does not match the preset impedance curve.

14. The terminal of claim 11 , wherein the vibration element is further configured to drive the housing to vibrate together when the vibration element vibrates.

15. The terminal of claim 14 , wherein the sound chamber comprises a rear sound chamber and a front sound chamber communicating with the rear sound chamber, wherein the electro-acoustic component is housed in the rear sound chamber, and the sound outlet communicates with the front sound chamber.

16. The terminal of claim 15 , wherein the housing comprises a rear housing and a front housing, wherein the rear housing is connected to the front housing, the rear housing encloses the rear sound chamber, and the front housing encloses the front sound chamber; the electro-acoustic component is arranged in the rear housing, and the vibration element is fixed to the front housing.

17. The terminal of claim 16 , wherein the front housing comprises a vibration sheet opposite to a sound emitting side of the electro-acoustic component, wherein the vibration element is fixed to the vibration sheet.

18. The terminal of claim 17 , wherein the vibration element is a piezoelectric ceramic piece.

19. The terminal of claim 18 , wherein the vibration sheet is a steel sheet.

20. The terminal of claim 16 , wherein the vibration element is located within the front sound chamber or outside the front sound chamber.

Assignees

• Guangdong Oppo Mobile Telecommunications Corp Ltd
• King Tone Innovation Beijing Tech Co Ltd

Inventors

• Yan Bixiang
• Yan Xin

Classifications

• H04R1/021 Primary

  incorporating only one transducer · CPC title

• H04R17/00

  Piezoelectric transducers; Electrostrictive transducers (piezoelectric or electrostrictive elements in general H10N30/00; details of piezoelectric or electrostrictive motors, generators or positioners {H10N30/00}) · CPC title

• B06B2201/77

  Atomizers · CPC title

• H04R29/001 Primary

  for loudspeakers (H04R29/007 takes precedence) · CPC title

• H04R2499/11

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