Microphone Assembly with Air Release Grooves to Prevent Diaphragm Rupture
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Microphone diaphragms rupture due to stress concentration along fixed boundaries under high pressure impacts, leading to product failure.
Innovation Solution
A microphone assembly with air release columns and grooves that are fixedly connected to a back plate, allowing the diaphragm to deform without tearing, and adjusting air release volume based on pressure changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the diaphragm is fixedly connected to the back plate along the boundary, then the diaphragm is stable during normal operation, but stress concentration occurs under high pressure impacts causing the diaphragm to rupture
Solution Approach 1:
The continuous fixed boundary connection is segmented into discrete fixed points through support columns. The diaphragm is connected to the back plate at multiple specific locations via support columns rather than along the entire boundary, distributing stress concentrations to discrete points and preventing catastrophic failure along the entire boundary.
Solution Approach 2:
The diaphragm has different connection characteristics at different locations: it is rigidly fixed at discrete support column locations while remaining flexible in between. This local differentiation allows the diaphragm to deform under pressure without stress concentration along the entire boundary, preventing rupture while maintaining stability at fixed points.
2Reliability
If air release structures are added to the diaphragm, then the air release volume increases under pressure, but the diaphragm structure becomes more complex
Solution Approach 1:
The air release function is merged with the existing support column structure. The support columns serve dual purposes: providing mechanical support for the diaphragm and creating air release channels through the gaps between them and the diaphragm surface, eliminating the need for separate air release structures.
Solution Approach 2:
The support columns perform multiple functions simultaneously: they provide mechanical support to the diaphragm, create air release channels when spaced from the diaphragm surface, and can be configured to control the air release volume. This multi-functionality reduces overall device complexity while improving air release capability.
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
Enhances mechanical reliability by preventing diaphragm cracking and maintaining sensitivity under varying pressures without down-vibrating structures.
Implementation Method 1
when deformation occurs in the deformed zone, the width of each of the plurality of air release grooves increases in the direction perpendicular to the thickness of the diaphragm, thereby increasing an air release volume
Data Source
Figure 1~3
Figure 4~5
AI summary
A microphone assembly and an electronic device. The microphone assembly includes at least one diaphragm (101), a back plate (102) disposed opposite the diaphragm (101), and at least one air release column (103) having one end fixedly connected to the back plate (102). In a direction perpendicular to a thickness direction of the diaphragm (101), an edge portion (1032) of the other end of the at least one air release column (103) is spaced apart from the diaphragm (101) by a preset distance, thereby forming at least one air release groove (1011).