Piezoelectricity ceramic piece and piezoelectricity ceramic loudspeaker adopting same

Abstract

The invention discloses a piezoelectricity ceramic piece and a piezoelectricity ceramic loudspeaker adopting the same. The piezoelectricity ceramic piece takes the shape of a butterfly, that is, two ends of the piezoelectricity ceramic piece are broad, and the middle of the piezoelectricity ceramic piece shrinks inwards; the piezoelectricity ceramic loudspeaker comprises a front cover with sound holes formed in the middle, a vibration sound production component formed by an elastic vibrating diaphragm or an organic vibrating diaphragm, a metal diaphragm frame or a metal vibrating diaphragm, a piezoelectricity ceramic piece or the like is fixedly arranged in the front cover; a rear cover is fixedly connected with the front cover; the extraction electrode of the piezoelectricity ceramic piece is led out of the rear cover by a flexible printed circuit board to serve as the electric signal end of the piezoelectricity ceramic loudspeaker. The invention has the advantages that the low-frequency characteristic and the intermediate frequency tone of the butterfly-shaped piezoelectricity ceramic piece are good; and besides, the low-frequency characteristic of the piezoelectricity ceramic loudspeaker adopting the butterfly-shaped piezoelectricity ceramic piece, an obvious mid-frequency valley does not exist, the sound quality of a mid-frequency belt is good, and the distortion is less.

Description

technical field [0001] The invention relates to a piezoelectric ceramic sheet and a piezoelectric ceramic loudspeaker prepared therefrom. Background technique [0002] Currently commonly used piezoelectric ceramics—including single crystal and twin crystal piezoelectric ceramics—are rectangular or circular in shape, and the low-frequency characteristics of piezoelectric ceramics in this shape are poor, usually not lower than 700HZ; The sound quality is poor and the distortion is large between 5KHZ and 6KHZ in the middle frequency band; the piezoelectric ceramic speaker made of the piezoelectric ceramic sheet of the above shape has a poor bass reproduction effect in the low frequency band; in the middle frequency band, due to the phase cancellation of the sound radiation in space, It will form an obvious deep valley-commonly known as the mid-frequency valley, resulting in large distortion and poor sound quality. Contents of the invention [0003] One object of the present ...

AI Technical Summary

Problems solved by technology

[0002] Currently commonly used piezoelectric ceramics—including single crystal and twin crystal piezoelectric ceramics—are rectangular or circular in shape, and the low-frequency characteristics of piezoelectric ceramics in this shape are poor, usually not lower than 700HZ; The sound quality is poor and the distortion is large between 5KHZ and 6KHZ in the middle frequency band; the piezoelectric ceramic speaker made of the piezoelectric ceramic sheet of the above shape has a poor bass reproduction effect in the low frequency band; in the middle frequency band, due to the phase cancellation of the sound radiation in space, It will form an obvious deep valley - commonly known as the mid-frequency valley, resulting in large distortion and poor sound quality

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