Sound device

Patent metadata

Field	Value
Publication number	US-12413912-B2
Application number	US-202318327006-A
Country	US
Kind code	B2
Filing date	May 31, 2023
Priority date	Dec 6, 2022
Publication date	Sep 9, 2025
Grant date	Sep 9, 2025

Abstract

The present disclosure discloses a sound device including a frame, a magnet system, and a first vibration system and a second vibration system. The magnet system includes a first inner yoke, a main magnet fixed to the first inner yoke, and a second inner yoke fixed to one side of the main magnet away from the first inner yoke; the first vibration system includes a first diaphragm, a first coil surrounding the second inner yoke, and a first FPC electrically connected with the first coil; the first coil includes a first corner portion; the first FPC includes a first fixation portion, a first welding portion welded to the first coil, and a first elastic portion; the first welding portion is located on one side of the first corner portion away from the second inner yoke. 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 having a first magnetic gap and a second magnetic gap interconnected with each other, comprising:
a first inner yoke;
a main magnet fixed to the first inner yoke; and
a second inner yoke fixed to one side of the main magnet away from the first inner 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 the second inner yoke; and
a first flexible printed circuit (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 coil comprises a first corner portion located in corner position; 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 coil; the first welding portion is located on one side of the first corner portion away from the second inner yoke;
the magnet system further comprises a side magnet fixed to the frame, a first side yoke fixed to one side of the side magnet facing the first diaphragm, a second side yoke fixed to one side of the side magnet facing the second diaphragm, and a connection portion connecting the first inner yoke and the first side yoke; the first magnetic gap is formed between the first side yoke and the second inner yoke; the second magnetic gap is formed between the first inner yoke and the second side yoke; the first welding portion is malposed with the first side yoke along a vibration direction.

2. The sound device as described in claim 1 , wherein the first FPC comprises two first welding portions; two welding portions are arranged along a diagonal of the first coil.

3. The sound device as described in claim 1 , wherein a recessed portion opposite to the first welding portion is provided on the first side yoke along the vibration direction.

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

5. The sound device as described in claim 1 , wherein the frame is in a rectangle shape; the side magnet is fixed to the frame along a long axis; the connection portion connects the first inner yoke with an edge of the first side yoke along a short axis.

6. The sound device as described in claim 5 , 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.

7. The sound device as described in claim 6 , wherein the second vibration system further comprises two second FPCs; two second FPCs are arranged on two opposite sides of the second coil along the short axis.

Assignees

• Aac Microtech Changzhou Co Ltd

Inventors

• Ren Li
• Zhang Chao

Classifications

• H04R9/025 Primary

  Magnetic circuit · CPC title

• H04R3/00

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

• H04R9/045

  Mounting (H04R9/043 takes precedence) · CPC title

• H04R2400/11

  Aspects regarding the frame of loudspeaker transducers · CPC title

• H04R7/18

  at the periphery · CPC title