Novel piezoelectric patch structure

Abstract

The invention discloses a novel piezoelectric patch structure comprising a metal substrate, a first ceramic chip, and a first main electrode; the first axial end face of the metal substrate is connected with that of the first ceramic chip; the first main electrode is arranged on the second axial end face of the first ceramic chip, and provided with a contain space, wherein a feedback electrode is arranged on the second axial end face of the first ceramic chip and located in the contain space of the first main electrode; the novel piezoelectric patch structure also comprises a second ceramic chip, a second main electrode and a conductor; the second axial end face of the metal substrate is connected with the first axial end face of the second ceramic chip; the second main electrode is arranged on second axial end face of the second ceramic chip; one end of the conductor is connected with the first main electrode; the other end of the conductor is connected with the second main electrode. The novel piezoelectric patch structure can enhance feedback signals and can obtain improved sound pressure.

Description

technical field [0001] The invention relates to a novel piezoelectric sheet structure. Background technique [0002] Piezoelectric ceramic chip is a kind of electronic sounding element. A piezoelectric ceramic dielectric material is placed between two copper circular electrodes. When an AC audio signal is connected to the two electrodes, the piezoelectric chip will Vibration produces a corresponding sound. Due to its simple structure and low cost, piezoelectric ceramic sheets are widely used in electronic appliances such as toys, electronic watches for pronunciation, electronic instruments, electronic clocks, timers, etc. [0003] As the core component of the active piezoelectric ceramic buzzer, the piezoelectric ceramic buzzer is usually only pasted with a ceramic sheet on one side of the metal substrate, and when designing the ceramic electrode, it is also installed on the outer electrode of the ceramic. There are main electrode and feedback electrode. In order to maxim...

AI Technical Summary

Problems solved by technology

In order to maximize the vibration of the ceramic under the main electrode to provide higher sound pressure, the feedback electrode is often designed to be very small, so there will be a circuit that receives the feedback signal because the feedback electrode is small and the feedback signal is not strong. The signal to the main electrode is weak, resulting in low sound pressure of the product

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