PIEZOELECTRIC LOW-FREQUENCY/HIGH DB ELECTROACOUSTIC ASSEMBLY AND PIEZOELECTRIC SPEAKER APPLYING SAME

WIPO Patent Application WO/2018/036114

A1

The present invention discloses a piezoelectric low-frequency/high dB electroacoustic assembly and a piezoelectric speaker applying the same, and relates to the field of piezoelectric speakers. The piezoelectric low-frequency/high dB electroacoustic assembly of the present invention comprises a fixed ring and at least one buzzer group mounted on the fixed ring. Each buzzer group comprises two piezoelectric buzzers parallely disposed. The two piezoelectric buzzers are separated by a gap. Vibration phases of the two piezoelectric buzzers are the same, and vibration phases of the buzzer groups are also the same. By adjusting the gap between the two piezoelectric buzzers of the buzzer group, the resonance frequency and the compliance of the electroacoustic assembly can be adjusted. The present invention further discloses a piezoelectric speaker applying the electroacoustic assembly. By using ordinary piezoelectric buzzers, the present invention can simultaneously meet a requirement for low frequency and high dB performance, and can, if used with an appropriate resonant cavity, meet the requirements of the American UL 464 standard.

JPH05244680	SPEAKER DEVICE
JP2020005174	SPEAKER DEVICE
JP2018537007	Integrated Soundbar Hinge Assembly for Mobile Electronic Devices

JIANG YIN (CN)

PCT/CN2017/074099

March 01, 2018

February 20, 2017

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JIANG YIN (CN)

H04R1/28; H04R17/10

CN106255022A	2016-12-21
CN206042362U	2017-03-22
CN201294032Y	2009-08-19
CN103041977A	2013-04-17
US6717331B1	2004-04-06
US20060049715A1	2006-03-09
US20140050339A1	2014-02-20

See also references of EP 3484175A4

NANJING ZHISHI LAW FIRM OF INTELLECTUAL PROPERTY (CN)

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