Conductive ECU Housing With Comb Partitions for EMI Shielding
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Solution Overview
Problem
Existing electronic control devices face challenges in achieving effective noise resistance from external electromagnetic interference while maintaining cost-effectiveness, particularly due to the need for separate shielding housings and complex connector management.
Innovation Solution
The device incorporates a conductive housing with comb-blade-shaped partitions for connectors, enhancing noise resistance by reducing opening area and resonance frequencies, and utilizing electrical connections between housing components to equalize potential differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a separate electromagnetic-wave shield structure is introduced to protect the electronic apparatus from external noises, then noise resistance is improved, but device complexity and cost increase
Solution Approach 1:
The patent merges the electromagnetic shielding function with the housing structure by making the housing itself conductive. The housing comprises a first housing component and a second housing component that are electrically connected, forming an integrated conductive shield without requiring a separate shielding structure. This resolves the contradiction by eliminating the need for additional shield components while maintaining noise resistance.
Solution Approach 2:
The housing is designed to serve multiple functions simultaneously: it provides mechanical protection, structural support, and electromagnetic shielding. By making the housing conductive and electrically connecting its components, the same structure that protects the electronic apparatus physically also shields it from external noises, eliminating the need for separate shielding housings.
2Object-affected harmful factors
If connectors are connected to the electronic apparatus in advance within the housing, then noise resistance is improved, but ease of operation deteriorates due to inability to insert and remove connectors without opening the housing
Solution Approach 1:
The housing is segmented into a first housing component and a second housing component that can be separated from each other. The connectors are attached to the circuit board within the housing, but the housing components can be detached to allow access to the connectors. This segmentation allows connectors to be connected in advance for noise resistance while still enabling easy insertion and removal by separating the housing components.
3Object-affected harmful factors
If a conductive housing with openings for connectors is used, then noise resistance is improved by reducing opening area, but device complexity increases due to need for comb-blade-shaped portions
Solution Approach 1:
The comb-blade-shaped portions are not separate shielding components but are integrated directly into the housing structure. The first and second housing components themselves form the comb-blade shapes that partition the openings, merging the shielding function with the housing structure and reducing overall device complexity.
Solution Approach 2:
The openings in the housing are partitioned into multiple smaller openings by comb-blade-shaped portions, segmenting the large opening area into smaller sections. This segmentation reduces the effective opening area for noise entry while the comb-blade shapes are formed as integral parts of the housing components, avoiding additional complexity.
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 design achieves improved noise resistance and reduced communication errors at lower costs by minimizing noise entry and resonance, while maintaining structural integrity and ease of connector management.
Implementation Method 1
at least one of a first housing component and a second housing component which constitute the housing has a comb-blade-shaped portion for partitioning the opening for each of the plurality of connectors
Implementation Method 2
a housing made of a conductive material and adapted to accommodate the circuit board therein, in which the housing has an opening corresponding to the connectors, and at least one of a first housing component and a second housing component which constitute the housing has a comb-blade-shaped portion for partitioning the opening for each of the plurality of connectors
Data Source
AI summary
An electronic control device includes a circuit board having a plurality of connectors for connection to an external apparatus, and a housing made of a conductive material and adapted to accommodate the circuit board therein. The housing has an opening corresponding to the connectors, and at least one of a first housing component and a second housing component which constitute the housing has a comb-blade-shaped portion for partitioning the opening for each of the connectors.