Microphone Module PCB Groove Channel Design
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Solution Overview
Problem
Existing microphone modules have complex designs with multiple components, leading to increased assembly complexity, height, and costs while maintaining acoustic characteristics is a challenge.
Innovation Solution
A simplified design featuring a PCB with grooves on its top surface that transform into sound channels, eliminating the need for additional building components, and using a sealing element to cover these grooves, which reduces the number of parts, assembly work, and overall height, while maintaining acoustic performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an additional building component with channels is used between the PCB and sealing element, then the acoustic characteristics are maintained, but the device complexity, number of parts, assembly work, and overall height increase
Solution Approach 1:
The patent integrates the channel-forming function into the sealing element itself, merging what was previously a separate building component with the sealing element. The sealing element now performs both sealing and sound guidance functions through integrated channels, eliminating the need for additional components while maintaining acoustic characteristics.
Solution Approach 2:
The sealing element is designed to serve multiple functions: it provides sealing, creates sound channels for acoustic guidance, and maintains structural integrity. This multi-functional design eliminates the need for separate building components while preserving the required acoustic performance.
2Reliability
If an additional building component with channels is used between the PCB and sealing element, then the acoustic characteristics are maintained, but the assembly work and overall height increase
Solution Approach 1:
By combining the channel-forming function with the sealing element, the patent reduces the number of assembly steps. The sealing element is installed in one piece, automatically creating the necessary channels, rather than requiring separate assembly of building components with channels.
3Adaptability or versatility
If vents are arranged in offset with respect to passages, then the distance for sound passage can be manipulated, but the device complexity increases
Solution Approach 1:
The patent utilizes the three-dimensional space within the sealing element to create offset channels that connect vents to passages. By designing channels that traverse different spatial dimensions within the sealing element, the patent achieves distance manipulation without adding external complexity.
Data Source
AI summary
A Microphone module (101) is disclosed which comprises a MEMS-microphone capsule (102), a PCB (103) and a sealing element (104), wherein the PCB (103) comprises on its top surface (108) a first groove (115) which opens at a first end (115a) into the first passage (109) and the PCB (103) further comprises on its top surface (108) a second groove (116) which opens at a first end (116a) into the second passage (110) and wherein the sealing element (104) is arranged on the top surface (108) of the PCB (103) and that the sealing element (104) covers the first groove (115) and the second groove (116) in such a way that the first groove (115) is transformed into a first channel (117) and the second grove (116) is transformed into a second channel (118).