Piezoelectric Vibrator Assembly With Perpendicular Motion Amplification
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Solution Overview
Problem
Conventional piezoelectric vibrators for tactile feedback, speakers, and pressure sensors have large volumes, slow responses, and fixed, unadjustable resonance frequencies due to numerous components and complex structures.
Innovation Solution
A piezoelectric vibrator design featuring a piezoelectric body with amplifying units made of metal sheets, allowing for expansion or contraction in perpendicular directions when subjected to voltage, resulting in a compact, fast-responding device with adjustable resonance and high energy conversion efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional piezoelectric vibrators use multiple components and complex structures to achieve various functions, then functional versatility is improved, but device volume increases and response speed decreases
Solution Approach 1:
The piezoelectric vibrator is designed to perform multiple functions including tactile feedback, sound generation, and pressure sensing using a unified structure. The piezoelectric body can operate in different modes (expansion/contraction along first direction for tactile feedback, expansion/contraction along second direction for sound generation), eliminating the need for separate dedicated components for each function.
Solution Approach 2:
The patent combines multiple functional components into a single integrated piezoelectric vibrator structure. The amplifying unit is directly coupled to the piezoelectric body, merging the actuation mechanism and amplification function into one compact unit, thereby reducing overall device volume while maintaining functional versatility.
2Adaptability or versatility
If conventional piezoelectric vibrators use multiple components and complex structures, then functional versatility is improved, but response speed becomes slow
Solution Approach 1:
The patent combines multiple functional components into a single integrated piezoelectric vibrator structure. The amplifying unit is directly coupled to the piezoelectric body, merging the actuation mechanism and amplification function into one compact unit, thereby reducing overall device volume while maintaining functional versatility.
Solution Approach 2:
The patent removes unnecessary intermediate components and control mechanisms from conventional designs. By directly coupling the amplifying unit to the piezoelectric body and eliminating complex transmission mechanisms, the design achieves faster response speed while maintaining functional versatility through the inherent capabilities of the piezoelectric material.
3Ease of manufacture
If conventional piezoelectric vibrators use fixed structural designs, then manufacturing simplicity is improved, but resonance frequency becomes unadjustable
Solution Approach 1:
The patent employs a dynamic design where the amplifying unit can be adjusted relative to the piezoelectric body. The amplifying unit includes adjustable elements that allow modification of the resonant frequency by changing the mechanical coupling characteristics or the geometry of the amplifying structure, enabling frequency tuning while maintaining ease of manufacture through standardized adjustment mechanisms.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design achieves a small volume, fast response, adjustable resonance frequency, and high energy conversion efficiency, making it suitable for various applications such as tactile feedback, speakers, and pressure sensing.
Implementation Method 1
The piezoelectric body is made of a single-layer or multi-layer material with a piezoelectric effect. The piezoelectric body, when subjected to an external voltage, expands or contracts along a first direction parallel to a plane of the piezoelectric body
Implementation Method 2
the amplifying unit is a flat structure formed by an elastic reinforcing element... the amplifying unit contracts or expands along a second direction
Data Source
AI summary
Provided are a piezoelectric vibrator and a piezoelectric vibrator assembly having a small volume, fast response, and high energy conversion efficiency. The piezoelectric vibrator includes a piezoelectric body and an amplifying unit fixedly supported on at least one of two opposite sides of the piezoelectric body. The piezoelectric body comprises a single-layer or multi-layer material with a piezoelectric effect. The amplifying unit is a flat structure formed by an elastic reinforcing element and having a same shape as the piezoelectric body. The elastic reinforcing element is a metal sheet. The piezoelectric body, when an external voltage is applied, expands or contracts along a first direction parallel to a plane of the piezoelectric body, and simultaneously, the amplifying unit contracts or expands along a second direction. The first direction and the second direction are perpendicular to each other.