Acoustic device

Patent metadata

Field	Value
Publication number	US-11943596-B2
Application number	US-202217749148-A
Country	US
Kind code	B2
Filing date	May 20, 2022
Priority date	Dec 16, 2021
Publication date	Mar 26, 2024
Grant date	Mar 26, 2024

Abstract

The present invention provides an acoustic device including a frame, a vibration system and a magnetic circuit system. The vibration system includes a diaphragm, a voice coil, a voice coil holder connecting the diaphragm and the voice coil, and a support assembly connecting the frame and the voice coil holder. The voice coil holder comprises a first fixing portion extending toward a direction of the voice coil, a second fixing portion extending toward to the support assembly, and a first connecting portion connecting the first fixing portion and the second fixing portion. The first fixing portion is mounted to the voice coil, and the second fixing portion is mounted to the support assembly. The first connecting portion provides with a reinforcing rib protruding and extending from the first fixing portion.

First claim

What is claimed is:

1. An acoustic device, comprising:
a frame;
a vibration system supported on the frame, the vibration system comprising:
a diaphragm;
a voice coil driving the diaphragm to generate sounds;
a voice coil holder connecting the diaphragm and the voice coil; and
a support assembly connecting the frame and the voice coil holder;

a magnetic circuit system supported on the frame and having a magnetic gap, the voice coil partially located in the magnetic gap;
wherein the voice coil holder comprises a first fixing portion extending toward a direction of the voice coil, a second fixing portion extending toward to the support assembly, and a first connecting portion connecting the first fixing portion and the second fixing portion, the first fixing portion mounted to the voice coil, the second fixing portion mounted to the support assembly, the first connecting portion providing with a reinforcing rib protruding and extending from the first fixing portion.

2. The acoustic device as described in claim 1 , wherein the voice coil holder is a plastic voice coil holder, and the reinforcing rib is a protruding structure integrally injection-molded with the first fixing portion, the second fixing portion and the first connecting portion.

3. The acoustic device as described in claim 1 , wherein the voice coil holder is a metal voice coil holder, and the reinforcing rib is a protruding structure formed by stamping from the first connecting portion.

4. The acoustic device as described in claim 1 , wherein the reinforcing rib protrudes in a direction away from the diaphragm.

5. The acoustic device as described in claim 4 , wherein the magnetic circuit system comprises a yoke and a main magnet mounted on the yoke, a plurality of auxiliary magnets around and spaced apart from the main magnet for forming the magnetic gap, and an auxiliary pole plate covered on the auxiliary magnets, and an avoiding portion is disposed on the auxiliary pole plate corresponding to a position of the reinforcing rib.

6. The acoustic device as described in claim 1 , wherein the acoustic device is rectangular, and the reinforcing rib is arranged along a direction of a long axis of the first connecting portion, and/or the reinforcing rib is arranged along a direction of a short axis of the first connecting portion.

7. The acoustic device as described in claim 1 , wherein the reinforcing ribs are symmetrically arranged on both sides of the first connecting portion.

8. The acoustic device as described in claim 1 , wherein the first connecting portion of the voice coil holder is a hollow annular structure, the voice coil holder further comprising a flat portion and a second connecting portion connecting the flat portion and the first connecting portion, the flat portion surrounded by the first fixing portion and the first connecting portion, the flat portion abutting against the diaphragm.

9. The acoustic device as described in claim 1 , wherein the first connecting portion at least partially abuts against the diaphragm.

10. The acoustic device as described in claim 1 , wherein the support assembly comprises a flexible circuit board mounted on a side of the voice coil holder away from the diaphragm and a support membrane mounted on a side of the flexible circuit board away from the frame, and the flexible circuit board comprises a first fixing end secured to the frame, a second fixing end secured to the voice coil holder, a third connecting portion connecting the first fixing end and the second fixing end, and a connecting arm bending and extending from the second fixing end, the voice coil comprising a leading wire, and the leading wire soldered and fixed to the connecting arm.

Assignees

• Aac Microtech Changzhou Co Ltd

Inventors

• Chen Weimin
• Liu Kejia

Classifications

• H04R9/045 Primary

  Mounting (H04R9/043 takes precedence) · CPC title

• H01F3/14

  Constrictions; Gaps, e.g. air-gaps (in magnetic shunt paths H01F3/12) · CPC title

• H04R7/16

  Mounting or tensioning of diaphragms or cones · CPC title

• H04R9/025

  Magnetic circuit · CPC title

• H01F2003/103

  Magnetic circuits with permanent magnets · CPC title