Microphone Metal Cover Elastic Switch Integration
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Solution Overview
Problem
Existing MEMS microphones with mechanical switch functions have complex structures, high production costs, and are prone to contact failures due to corrosion in humid environments, making them unsuitable for compact electronic devices.
Innovation Solution
A microphone design featuring a metal cover and elastic piece with a gap that electrically contacts under pressure, integrated with a circuit substrate and acoustic cavity, allowing for a simple, stable, and cost-effective structure with both switch and microphone functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a separate switch structure is used in addition to the microphone, then the switch function can be achieved, but the structure becomes complex and the cost increases
Solution Approach 1:
The patent combines the switch function with the microphone structure by making the metal cover elastic and capable of electrical contact with the circuit substrate. The metal cover serves dual purposes: as the microphone's protective enclosure and as the switch actuator, eliminating the need for a separate switch component.
Solution Approach 2:
The metal cover is designed to perform multiple functions: it protects the internal components, forms the acoustic cavity, and acts as the switch mechanism through its elastic deformation and electrical contact capability. This multi-functionality reduces overall device complexity.
2Adaptability or versatility
If traditional metal switch components are used, then the switch function is achieved, but corrosion occurs in humid environments leading to contact failure
Solution Approach 1:
The patent employs a metal cover with elastic properties that provides both mechanical switching action and corrosion resistance. The elastic material choice ensures reliability in humid environments while maintaining the switching function, avoiding the corrosion issues of traditional metal contacts.
3Volume of moving object
If the product size is reduced to meet compact requirements, then the occupancy is reduced, but the structure becomes more complex to integrate switch and microphone functions
Solution Approach 1:
The patent merges the switch and microphone into a single integrated structure where the metal cover serves both as the microphone housing and the switch mechanism. This consolidation reduces the overall occupancy while avoiding the complexity of integrating separate components.
4Adaptability or versatility
If more components are involved in the manufacture, then the switch and microphone functions can be implemented, but the production cost increases
Solution Approach 1:
The patent reduces manufacturing complexity and cost by combining the switch and microphone functions into a single structure. The metal cover serves dual purposes, eliminating the need for separate switch components and reducing assembly steps.
Solution Approach 2:
The multi-functional metal cover reduces the total component count and simplifies the manufacturing process, leading to lower production costs while maintaining both switch and microphone functionalities.
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 results in a thin, stable, and cost-effective microphone with a simple structure, suitable for compact electronic devices, offering enhanced reliability and versatility across various applications.
Implementation Method 1
a metal elastic piece, wherein a gap is formed between the metal elastic piece and the metal cover, and the metal elastic piece electrically contacts with the metal cover under an effect of a pressing force
Data Source
AI summary
The present invention relates to a microphone, and more particularly, to a microphone with a mechanical switch function. A microphone with a mechanical switch function according to the present invention comprises a microphone body, wherein the microphone body comprises a circuit substrate above which a metal cover is disposed, an acoustic cavity formed by the metal cover and the circuit substrate; and a metal elastic piece, wherein a gap is formed between the metal elastic piece and the metal cover, and the metal elastic piece electrically contacts with the metal cover under an effect of a pressing force. By adopting the above-mentioned technical solutions, the present invention provides a microphone with functions of a mechanical switch, and the new type of microphone occupies less space, has a lower cost and is convenient to use.