Conductive Housing Partition for PCB EMI Shielding
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Solution Overview
Problem
Existing electronic control devices face challenges in effectively suppressing radio-frequency electromagnetic noise, particularly when mounting components near tall electronic components, as previous shield structures are inadequate in these configurations.
Innovation Solution
The electronic control device incorporates a conductive housing with a duplexing member that forms a cutout portion to avoid contact with tall electronic components and a partition portion to separate external connections, utilizing a conductive material like a sheet or resin, and connects to the circuit board through EMI gaskets for effective noise suppression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If connection portions are provided in the housing to suppress noise current, then radio-frequency electromagnetic noise is suppressed, but it becomes difficult to provide connection portions near tall electronic components
Solution Approach 1:
The housing is divided into multiple segments with connection portions distributed at different locations. Each connection portion independently contributes to noise suppression, allowing the system to achieve effective shielding without requiring a single complex connection structure near tall components.
Solution Approach 2:
The housing acts as an intermediary structure between the electronic components and the external environment. By providing connection portions that electrically connect the housing to the circuit board, the housing mediates the suppression of noise current generated by electronic components, particularly addressing the challenge near tall components through its structural positioning.
2Object-affected harmful factors
If multiple connection portions are provided in the housing, then noise suppression is improved, but device complexity increases
Solution Approach 1:
The housing serves multiple functions simultaneously: it provides mechanical protection for electronic components, structurally positions connection portions for noise suppression, and electrically connects to the circuit board through integrated connection portions. This multi-functionality reduces the need for separate dedicated noise suppression structures.
Solution Approach 2:
The connection portions are merged into the housing structure itself rather than being separate components. The housing and connection portions form an integrated structure that simplifies assembly and reduces the number of discrete parts, while still providing effective noise suppression through multiple connection points.
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
This configuration significantly reduces radio-frequency electromagnetic noise by confining noise sources and improving structural strength, while allowing for high-density component arrangements and cost-effective manufacturing.
Implementation Method 1
a duplexing member 203 which has conductivity and is arranged between an inner surface of the housing 201 and the mounting surface of the circuit board 101
Data Source
AI summary
An electronic control device comprising: a housing having conductivity; a circuit board that is arranged in the housing and has a first electronic component mounted on a mounting surface; an external connection portion that is electrically connected to the circuit board and is connectable to a device outside the housing; and a duplexing member that has conductivity and is arranged between an inner surface of the housing and the mounting surface of the circuit board, in which the duplexing member forms a cutout portion to avoid contact between the duplexing member and the first electronic component, and further forms a partition portion that partitions the external connection portion between the housing and the circuit board.