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Piezoelectric vibration sounding module

A sounding module and piezoelectric vibration technology, applied in the direction of sounding devices, piezoelectric/electrostrictive transducers, electrical components, etc., to achieve a wide range of applications, reduce device costs, and save volume

Active Publication Date: 2018-01-09
SHANGHAI RES INST OF MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because tactile feedback requires the device to provide vibration in a resonant state, and audio vibration requires strong vibration in a frequency range, the same device often cannot achieve good tactile feedback and audio output at the same time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A piezoelectric vibration-sounding module, the vibration-sounding module 1 includes a base 111 and a cantilever beam 12, the cantilever beam 12 is arranged on the base 111, the cantilever beam 12 is provided with at least one fixed area and fixed on the base 111 through the fixed area, the cantilever beam The fixed area on 12 is a fixed end, and the remaining free parts are free ends. The vibration and sound module 1 also includes a hardened piezoelectric sheet 122 for changing the resonance frequency of the vibration and sound module 1 and a vibrating piezoelectric sheet 123 for providing vibration. Both the piezoelectric sheet 122 and the vibrating piezoelectric sheet 123 are provided with at least one, the hardened piezoelectric sheet 122 is arranged at the fixed end of the cantilever beam 12 and extends from the initial end of the fixed end to the free end, and the vibrating piezoelectric sheet 123 is arranged at the free end of the cantilever beam 12 And extending f...

Embodiment 2

[0043] Such as Figure 4 and 5 As shown, the difference between this embodiment and Embodiment 1 is that one cantilever beam 12 is provided, the middle part of the cantilever beam 12 is a fixed area, and the two ends of the cantilever beam 12 fixed area are two free ends of the cantilever beam 12; One is located in the middle of the base 111; a hardened piezoelectric sheet 122 is arranged and fixed in a fixed area in the middle of the cantilever beam 12, the hardened piezoelectric sheet 122 covers the fixed area and its two ends extend to the two free ends of the cantilever beam 12 respectively, and the hardened piezoelectric sheet 122 The edges of both ends of the sheet 122 exceed the edge of the boss 112; two vibrating piezoelectric sheets 123 are arranged on two free ends of the cantilever beam 12. The fixed area in the middle extends, and there is a distance between the two vibrating piezoelectric sheets 123 and the hardened piezoelectric sheet 122 . At the same time, th...

Embodiment 3

[0045] Such as Figure 6 and 7 As shown, the difference between this embodiment and Embodiment 1 is that one cantilever beam 12 is provided, and a fixed area is provided at both ends of the cantilever beam 12, thereby forming two fixed ends, and the area between the two fixed ends is the cantilever arm 12 free ends; boss 112 is provided with two and is respectively positioned at the two ends of base 111, and the fixed end of cantilever beam 12 two ends is respectively fixed on two bosses 112; Cantilever beam 12 two ends are respectively provided with a hardened piezoelectric sheet 122, the hardened piezoelectric sheet 122 is arranged on the fixed end of the cantilever beam 12 and extends to the free end, the length of the hardened piezoelectric sheet 122 is greater than the length of the corresponding boss 112, and a vibrating piezoelectric sheet 123 is arranged in the middle of the cantilever beam 12, and the vibration pressure The electric sheet 123 extends from the middle ...

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Abstract

The invention relates to a piezoelectric vibration sounding module which comprises a base and a cantilever beam. The cantilever beam is provided with at least one fixed area and is fixed on the base through the fixed area. The fixed area on the cantilever beam is a fixed end, and other free parts are free ends. The vibration sounding module further comprises a hardened piezoelectric sheet used forchanging the resonance frequency of the vibration sounding module and a vibration piezoelectric sheet used for providing vibration, wherein at least one hardened piezoelectric sheet and at least onevibration piezoelectric sheet are arranged. The hardened piezoelectric sheet is arranged on the fixed end of the cantilever beam and extends toward the free ends. The vibration piezoelectric sheet isarranged on the free ends of the cantilever beam and extends toward the fixed end. A space is left between the hardened piezoelectric sheet and the vibration piezoelectric sheet. The hardened piezoelectric sheet is connected with excitation voltage of different frequencies. The resonance frequency of the entire module is changed. The vibration piezoelectric sheet produces haptic vibration or makessounds. Compared with the prior art, the piezoelectric vibration sounding module provided by the invention has the advantages that a piezoelectric device with a composite function is provided; the cost of the device is reduced; and the volume is saved.

Description

technical field [0001] The invention relates to a piezoelectric module, in particular to a piezoelectric vibration sounding module. Background technique [0002] When the piezoelectric element is connected to an AC signal, it can generate vibration. Signals with lower frequencies (0-300Hz) can produce tactile vibrations, and signals with higher frequencies (300Hz-20000Hz) can produce audio vibrations. Therefore, piezoelectric elements are often used as tactile feedback or vibration sources for speakers. As the vibration source of tactile feedback, the piezoelectric element has the advantage of clear vibration. At the same time, as the vibration source of the speaker, it can not only provide high-quality high-frequency vibration signals, but also because of its large vibration volume and high acoustic impedance, the sound It can pass through the panel without passing through the sound hole, so it can provide a certain waterproof performance. Patent CN 103386397 A discloses...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K9/122H04R17/00G06F3/01
Inventor 赵程曾涛张刚华
Owner SHANGHAI RES INST OF MATERIALS CO LTD
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