Sound device

Patent metadata

Field	Value
Publication number	US-12356173-B2
Application number	US-202318325075-A
Country	US
Kind code	B2
Filing date	May 29, 2023
Priority date	Dec 6, 2022
Publication date	Jul 8, 2025
Grant date	Jul 8, 2025

Abstract

The present disclosure discloses a sound device including a frame, a magnet system, a first vibration system and a second vibration system. The magnet system includes a first inner yoke, a main magnet, a side magnet, a first side yoke, and a connection portion. A first coil of the first vibration system is inserted in to a first magnetic gap. A first FPC of the first vibration system includes a first fixation portion, a first welding portion welded to the first coil, and a first elastic portion connecting the first fixation portion with the first welding portion; the first elastic portion is spaced apart from the first side yoke along a vibration direction; the first welding portion is fixed to a side of the first side yoke facing the first diaphragm. The sound device has better magnetic field performance and vibration performance.

First claim

What is claimed is:

1. A sound device comprising:
a frame having a receiving space;
a magnet system received in the receiving space, comprising:
a first inner yoke;
a main magnet fixed to the first inner yoke;
a side magnet fixed to the frame and spaced apart from the first inner yoke forming a second magnetic gap;
a first side yoke fixed to the side magnet and spaced apart from the main magnet forming a first magnetic gap; and
a connection portion connecting the first inner yoke with the first side yoke;

a first vibration system arranged on one side of the magnet system, comprising:
a first diaphragm fixed to the frame;
a rectangular first coil inserted into the first magnetic gap and surrounding the main magnet; and
a first FPC electrically connected with the first coil;

a second vibration system arranged on the other side of the magnet system, comprising:
a second diaphragm fixed to the frame; and
a second coil inserted into the second magnetic gap and malposed with the first coil; wherein

the first FPC comprises a first fixation portion fixed to the frame, a first welding portion welded to the first coil, and a first elastic portion connecting the first fixation portion with the first welding portion; the first elastic portion is spaced apart from the first side yoke along a vibration direction; the first welding portion is fixed to a side of the first side yoke facing the first diaphragm.

2. The sound device as described in claim 1 , wherein the first FPC further comprises a first bending portion bending from one end of the first elastic portion away from the first fixation portion and extending towards the first side yoke; the first welding portion extends from one end of the first bending portion away from the first elastic portion.

3. The sound device as described in claim 1 , wherein the frame is in a rectangle shape; the first elastic portion extends along a long axis of the frame.

4. The sound device as described in claim 2 , wherein a protrusion extending towards the first coil is provided on the frame; the first elastic portion is fixed to one side of the protrusion facing the first diaphragm; the first bending portion is fixed to the protrusion.

5. The sound device as described in claim 3 , wherein the side magnet is fixed to the frame along the long axis; the connection portion connected the first inner yoke with an edge of the first side yoke along a short axis.

6. The sound device as described in claim 1 , wherein a projection of the first coil is located inside of the second coil along the vibration direction.

7. The sound device as described in claim 1 , wherein the magnet system further comprises a second inner yoke fixed to one side of the main magnet away from the first inner yoke, and a second side yoke fixed to one side of the side magnet facing the second diaphragm.

8. The sound device as described in claim 1 , wherein the second vibration system further comprises a second FPC electrically connected with the second coil; the second FPC comprises a second fixation portion fixed to one end of the second coil away from the second diaphragm, a second welding portion fixed to the frame, a second elastic portion connecting the second fixation portion with the second welding portion, and a third welding portion extending from the second fixation portion to outside of the second coil; the second coil is electrically connected with the third welding portion.

9. The sound device as described in claim 8 , wherein the second vibration system further comprises two second FPCs; two second FPCs are arranged on two opposite sides of the second coil along a short axis.

Assignees

• Aac Microtech Changzhou Co Ltd

Inventors

• Ren Li
• Zhang Chao

Classifications

• H04R3/00

  Circuits for transducers (arrangements for producing a reverberation or echo sound G10K15/08; amplifiers H03F) · CPC title

• H04R9/025 Primary

  Magnetic circuit · CPC title

• H04R9/046

  Construction · CPC title

• H04R2400/11

  Aspects regarding the frame of loudspeaker transducers · CPC title

• H04R7/18

  at the periphery · CPC title