Thin Audio Component Mounting Structure for Non-Flat Surfaces
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Solution Overview
Problem
In cellular phones, mounting speakers on non-flat surfaces poses challenges for achieving stable vibration and uniform sound radiation, as existing methods require additional space or increased cost to ensure sound quality, particularly when level differences or bumpy surfaces are involved.
Innovation Solution
A thin audio component mounting structure that uses a strength retaining member in the shape of a thin sheet to cover and flatten non-flat portions on the substrate, allowing for stable fixation and improved sound quality without the need for an exhaust chamber or increased cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a speaker is mounted on a non-flat surface to achieve compactness, then the device thickness is reduced, but stable vibration and uniform sound radiation cannot be achieved
Solution Approach 1:
A level difference correcting member is introduced as an intermediary component between the non-flat substrate and the speaker rear face. This mediator fills the gaps and equalizes the surface, allowing the speaker to vibrate stably even when mounted on a compact, non-flat device body.
Solution Approach 2:
The level difference correcting member is positioned specifically at the non-flat portions of the substrate where the speaker is mounted. This localized approach addresses the specific problem areas (gaps and uneven surfaces) without requiring the entire device structure to be modified, maintaining compactness while achieving stable vibration.
2Reliability
If an exhaust chamber is used to improve sound quality, then uniform sound radiation is achieved, but device thickness and complexity increase
Solution Approach 1:
The invention extracts the essential function of sound quality improvement from the complex exhaust chamber structure. By using a simple level difference correcting member to ensure stable vibration and uniform sound radiation, the patent eliminates the need for the complicated exhaust chamber while achieving comparable or superior sound quality.
Solution Approach 2:
The invention changes the approach from modifying the acoustic chamber geometry (exhaust chamber) to correcting the mounting surface parameters (level differences). This parameter change simplifies the overall structure while achieving the desired sound radiation uniformity through stable vibration.
3Reliability
If a mold is used to create a flat mounting surface, then stable vibration is achieved, but manufacturing cost increases
Solution Approach 1:
The level difference correcting member is designed as a simple, inexpensive component that can be easily manufactured and replaced. This cheap intermediary component achieves stable vibration without requiring expensive mold modifications or complex manufacturing processes, making it economically viable for mass production.
Data Source
AI summary
Even when an audio component is mounted on a non-flat portion such as a level difference portion or a bumpy portion, the audio component is stably fixed so as to improve sound quality without requiring a space for improving the sound quality, such as an exhaust chamber, and without increasing the cost. For this purpose, when a mounting rear face area of the audio component covers the non-flat portion on a substrate on which the audio component is mounted, the audio component is fixed on the substrate with a strength retaining member in the shape of a thin sheet provided therebetween for cancelling a level difference against a rear face of the audio component in the non-flat portion.