Piezoelectric Speaker in Protective Case for Loudspeaker Volume
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Solution Overview
Problem
Current terminal designs face challenges in increasing loudspeaker volume due to size limitations, as larger speaker amplitudes require more space while maintaining lightweight and thinness.
Innovation Solution
A terminal protective case equipped with a piezoelectric speaker that, when combined with the terminal's speaker, significantly enhances loudspeaker volume, allowing for improved sound quality in noisy environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the amplitude of the speaker is increased to enhance loudspeaker volume, then the volume is improved, but the size of the speaker increases, which conflicts with the requirement for lightweight and thin terminal design
Solution Approach 1:
The patent combines the terminal speaker and the protective case piezoelectric speaker into a collaborative audio playback system. The piezoelectric speaker in the protective case works together with the terminal's built-in speaker to provide enhanced loudspeaker volume without requiring the terminal's speaker to be larger
Solution Approach 2:
The patent moves the additional sound output capability from the terminal internal space to the protective case external structure. By placing the piezoelectric speaker on the protective case, the solution utilizes the external dimension of the protective case to provide additional sound output without increasing the terminal's internal speaker size
2Power
If a piezoelectric speaker is added to the protective case to enhance loudspeaker volume, then the audio playback capability is improved, but the device complexity increases
Solution Approach 1:
The protective case is designed with multi-functionality: it provides both mechanical protection for the terminal and audio playback enhancement through the integrated piezoelectric speaker. This universal design allows the protective case to serve dual purposes without significantly increasing complexity
Solution Approach 2:
The patent uses a piezoelectric speaker which converts electrical signals directly to mechanical vibrations, replacing traditional electromagnetic speaker mechanisms. This substitution simplifies the audio system by eliminating the need for complex electromagnetic components while achieving enhanced loudspeaker volume
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 integration of a piezoelectric speaker within the terminal protective case increases loudspeaker volume and maintains a compact, lightweight design, providing better sound quality and portability.
Implementation Method 1
The drive circuit is configured to drive, in response to a communication signal of the terminal, the piezoelectric sheet to drive the diaphragm to vibrate
Data Source
AI summary
A terminal protective case and an audio playback system, the case including a housing, a diaphragm, a piezoelectric sheet, and a drive circuit. The housing has a main body part and a fastening frame part, a side of the fastening frame part is fastened to a periphery of the main body part, the fastening frame part and the main body part jointly enclose an accommodating groove configured to accommodate a terminal. The diaphragm is within the main body part, the piezoelectric sheet is fastened to the diaphragm, a front cavity is on a side of the diaphragm, a sound outlet hole is disposed on the main body part, and the sound outlet hole connects the front cavity to the outside of the main body part. The drive circuit is within the main body part and connected to the piezoelectric sheet, and is configured to drive the piezoelectric sheet.