Aac Technologies Pte. Ltd.

Aac Microtech (changzhou) Co, , Ltd.

Aac Technologies (nanjing) Co., Ltd.

Jiujian Liu

Yao Hui

Weimin Chen

Yufen Chu

A multifunctional sounding device is provided, including a housing, a sounding unit, and a motor assembly including a coil unit fixed to the housing. The sounding unit includes a basin frame, a vibration system and a magnetic circuit system, the vibration system is driven by the magnetic circuit system to vibrate in a first direction, the magnetic circuit system is elastically connected to the housing through elastic arms and has a through hole at a central position. The motor assembly is accommodated in the through hole, and the coil unit is spaced apart from the magnetic circuit system and drives the magnetic circuit system to vibrate in a second direction. The multifunctional sounding device has a small overall thickness and size, a strong driving force of the motor assembly and a small influence on the driving force of the magnetic circuit system, and excellent acoustic and vibration performance.

Multifunctional sounding device

The present invention provides a speaker box including a housing, a sound unit and a magnetic circuit coupling valve. The sound unit includes a bracket, a vibration system and a magnetic circuit system including a secondary magnet. The housing includes a bottom cover having leakage holes. The magnetic circuit coupling valve is accommodated in a rear cavity and includes a support, a negative stiffness diaphragm and a coil. The negative stiffness diaphragm faces to the leakage holes. The coil receives an external control signal and generates an electromagnetic field with the secondary magnet to drive the negative stiffness diaphragm to seal the leakage holes, or make the leakage holes open, or make the leakage holes partially open or closed. Compared with a related technology, the speaker box has fine acoustic performance and is able to accurately control communication of a rear cavity with the outside.

Speaker box

The present disclosure provides a dual magnetic circuits structure and a sound device, the dual magnetic circuits structure includes a shell and an inner magnetic assembly, the shell is made of a magnetically permeable material, the inner magnetic assembly is arranged in the shell and includes a first inner magnetic element and a second inner magnetic element, a first magnetic gap, a second magnetic gap, an outer diameter of the second inner magnetic element is greater than that of the first inner magnetic element. Therefore, compared to the existing dual magnetic circuits structure, the dual magnetic circuits structure provided by the present invention has the advantage that the thickness of the whole dual magnetic path structure can be effectively reduced while ensuring that the vibration spaces and winding heights of the first voice coil and the second voice coil are not changed.

Growing community of inventors

Shenzhen, China

Jiujian Liu