Sounding device

Patent metadata

Field	Value
Publication number	US-11290794-B2
Application number	US-202016993261-A
Country	US
Kind code	B2
Filing date	Aug 14, 2020
Priority date	Jun 30, 2019
Publication date	Mar 29, 2022
Grant date	Mar 29, 2022

Abstract

The present application discloses a sounding device including a base, and a vibration system and a magnetic circuit system fixed on the base. The vibration system includes a first diaphragm held on the base, and a voice coil of driving the first diaphragm to make a sound through vibration. The magnetic circuit system has a yoke and a magnetic body part fixed on the yoke. The yoke includes a main body arranged opposite to and apart from the base, and a turnup part fixed to the base. The magnetic circuit system further includes a breathable isolator attached to the turnup part and covering the through hole. Compared with the related art, the sounding device disclosed by the present application can prevent magnets from being separated from the yoke in a dropping experiment.

First claim

What is claimed is:

1. A sounding device, comprising:
a base, having two oppositely arranged first side surfaces and two oppositely arranged second side surfaces connected with the two first side surfaces; the first side surfaces and the second side surfaces being enclosed for forming an annular shape;
a vibration system having a first diaphragm mounted on the base, and a voice coil for driving the first diaphragm to make a sound through vibration;
a magnetic circuit system fixed on the base, the magnetic circuit system including a yoke having a main body arranged opposite to and apart from the base and a turnup part formed by extending towards the second side surfaces from the edge of the main body, and a magnetic body part fixed on the yoke with a magnetic gap for partially receiving the voice coil; wherein
the turnup part is fixed to the base and includes a plurality of through holes formed in the turnup part and communicating with the magnetic gap; and the magnetic circuit system further comprises a breathable isolator attached to the turnup part and covering the through hole;
the magnetic body part comprises a main magnet and a secondary magnet fixed on the main body; the main magnet is fixedly arranged at the center of the main body; and the secondary magnet is arranged apart from the main magnet and is clamped between the base and the yoke;
the vibration system further comprises an elastic support element fixed between one end of the voice coil far away from the diaphragm, and the second side surfaces; the elastic support element comprises spaced first fixing arm and second fixing arm, and an elastic arm connecting the first fixing arm and the second fixing arm; the first fixing arm is fixed at one end of the voice coil far away from the first diaphragm; and the second fixing arm is fixed on the second side surfaces.

2. The sounding device as described in claim 1 , wherein the turnup part and the main body are integrally formed.

3. The sounding device as described in claim 1 , wherein the plurality of through holes are formed in shape of at least one of square holes, round holes, triangular holes and trapezoidal holes.

4. The sounding device as described in claim 1 , wherein the second fixing arm is fixed to the second side surfaces in an attaching manner; and a tail end of the turnup part is fixed to the second fixing arm in an abutting manner.

Assignees

• Aac Technologies Pte Ltd

Inventors

• Shen Kaihua

Classifications

• H04R2499/11

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

• H04R9/025 Primary

  Magnetic circuit · CPC title

• H04R1/02 Primary

  Casings; Cabinets {; Supports therefor;} Mountings therein (H04R1/28 takes precedence {; attachments for microphones H04R1/08; mounting of transducers in earpieces H04R1/1075}) · CPC title

• H04R2209/027

  Electrical or mechanical reduction of yoke vibration · CPC title

• H04M1/035

  Improving the acoustic characteristics by means of constructional features of the housing, e.g. ribs, walls, resonating chambers or cavities · CPC title