EMC Housing With Embedded Metallic Shielding
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Solution Overview
Problem
Existing EMC housings are either expensive when made entirely of metal or ineffective when made of plastic due to insufficient shielding, and they often require complex and costly multi-part designs to ensure electrical conductivity and sealing.
Innovation Solution
A cost-effective EMC housing design featuring a first housing part made of plastic with a metallic material enclosed within, where the metallic material is accessible at the sealing surface for conductive contact, ensuring effective shielding and liquid-tight sealing without the need for expensive metal or complex multi-part designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a housing is made entirely of metal, then shielding effectiveness is improved, but manufacturing cost increases significantly
Solution Approach 1:
The patent applies composite materials by combining plastic housing parts with embedded metallic shielding layers. The plastic provides structural integrity and cost-effectiveness, while the metallic layer provides electromagnetic shielding. This composite structure resolves the contradiction by achieving effective shielding without requiring entirely metal construction, thus reducing manufacturing cost while maintaining reliability.
Solution Approach 2:
The patent applies local quality by placing metallic shielding material only where it is most needed for electromagnetic protection, rather than constructing the entire housing from metal. The metallic layer is strategically positioned within the plastic housing to provide shielding effectiveness at critical locations while minimizing overall material cost and manufacturing complexity.
2Ease of manufacture
If a plastic housing with metallic coating is used, then manufacturing cost is reduced, but shielding effectiveness deteriorates
Solution Approach 1:
The patent uses composite materials with a plastic matrix and embedded metallic phase to achieve both cost reduction and effective shielding. The metallic material is integrated within the plastic structure through injection molding processes, creating a composite that provides superior shielding compared to simple metallic coatings on plastic, while remaining more cost-effective than full metal construction.
Solution Approach 2:
The patent applies the nesting principle by embedding the metallic shielding material within the plastic housing structure. The metallic layer is nested inside the plastic matrix, allowing the plastic to provide structural functions while the embedded metal provides electromagnetic shielding. This nested configuration ensures effective shielding without requiring expensive external metal plating or coating processes.
3Reliability
If multi-part housings are used to ensure conductivity and sealing, then shielding and sealing performance are improved, but device complexity increases
Solution Approach 1:
The patent applies merging by integrating multiple functions into single housing parts. The housing parts combine structural support, electromagnetic shielding, and sealing functions within unified components. The plastic parts with embedded metallic layers provide both structural integrity and shielding capability, while integrated sealing elements combine sealing and electrical connectivity functions, thereby reducing the total number of parts while maintaining or improving performance.
Solution Approach 2:
The patent applies universality by designing housing parts that perform multiple functions simultaneously. The plastic housing parts with embedded metallic layers serve as both structural components and electromagnetic shields. Sealing elements are designed to provide both liquid-tight sealing and electrical conductive connections. This multi-functionality reduces device complexity by eliminating the need for separate components for each function while maintaining or improving overall shielding and sealing performance.
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 proposed EMC housing achieves effective shielding of electrical components while maintaining a low production cost and ensuring liquid-tight sealing, thus addressing the limitations of both metal and plastic-based housing solutions.
Implementation Method 1
The metallic material (as the only component of the first housing part) serves to shield the electrical component from electrical or electromagnetic radiation
Data Source
AI summary
An EMC housing for an electrical component, having a first housing part and a second housing part which are connected to one another via a sealing surface and together enclose a volume of the housing in a liquid-tight manner At least the first housing part comprises a plastic material and a metallic material enclosed by the plastic material, and the metallic material is arranged so as to be accessible at least in the region of the sealing surface for electrically conductive contacting of the second housing part.