Sound generating device
AssigneeAAC Technologies Pte. Ltd.
InventorsBo Xiao, Ronglin Linghu, Xiaodong Liu
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Abstract
The present invention provides a sound generating device, including a housing and a vibration system accommodated in the housing, the vibration system including a diaphragm and a driving unit for driving the diaphragm to vibrate and generate sound. The driving unit includes a piezoelectric driving unit and a moving iron driving unit coupled in parallel with the piezoelectric driving unit, the piezoelectric driving unit including a piezoelectric sheet, the moving iron driving unit including a coil and a magnetic steel. The piezoelectric driving unit and the moving iron driving unit jointly drive the diaphragm to vibrate and sound.
Claims16
A sound generating device, comprising a housing, a vibration system accommodated in the housing and a circuit board, the vibration system comprising a diaphragm and a driving unit for driving the diaphragm to vibrate and generate sound, wherein
- the driving unit comprises a piezoelectric driving unit and a moving iron driving unit coupled in electrical parallel with the piezoelectric driving unit;
- wherein the piezoelectric driving unit comprises a piezoelectric sheet, and the moving iron driving unit comprises a coil and a magnetic steel;
- and
- the piezoelectric driving unit and the moving iron driving unit jointly drive the diaphragm to vibrate and generate sound, the piezoelectric driving unit comprises a first base fixed to the housing and fixed to both ends of the piezoelectric sheet, a first support extending from the piezoelectric sheet toward the diaphragm and connected to the diaphragm, and a bump fixing the piezoelectric sheet to the first base.
Dependencies are inferred from the claim text.