Conductive Foam Port for EMI Shielding and Cable Management
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Solution Overview
Problem
Existing solutions for electromagnetic interference (EMI) shielding in electrical enclosures, such as EMI shielded cable glands, are costly, cumbersome, and inflexible, particularly when dealing with multiple cables entering a small enclosure, leading to issues with cable organization and maintenance.
Innovation Solution
A port with a slit in a sealing member made of resilient conductive material, such as conductive foam, that seals openings in electrical enclosures, allowing multiple cables to pass through while maintaining electromagnetic shielding by ensuring electrical continuity between the enclosure and the sealing member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If EMI shielded cable glands are used to seal cable openings, then electromagnetic shielding is achieved, but cost and device complexity increase significantly
Solution Approach 1:
The patent combines multiple functions into a single sealing member: electromagnetic shielding, sealing, and cable accommodation. The conductive foam material provides both sealing and EMI shielding properties, eliminating the need for separate shielded cable glands for each cable.
Solution Approach 2:
The sealing member serves multiple purposes simultaneously: it seals the opening against environmental factors, provides electromagnetic shielding, and accommodates multiple cables of varying sizes through its resilient material properties.
2Object-affected harmful factors
If EMI shielded cable glands are used for each cable, then electromagnetic shielding is maintained, but cable organization and maintenance become problematic
Solution Approach 1:
Multiple cable glands are replaced by a single unified sealing member that accommodates all cables together, simplifying cable organization and making maintenance operations much easier.
3Object-affected harmful factors
If EMI shielded cable glands are used for each cable, then electromagnetic shielding is achieved, but flexibility for cable additions/modifications is reduced
Solution Approach 1:
The sealing member's resilient conductive foam material allows dynamic adaptation to different cable configurations. Cables can be added, removed, or modified without disassembling the port, as the foam automatically adjusts its shape to maintain the seal.
4Adaptability or versatility
If multiple cables pass through a small enclosure opening, then connectivity is achieved, but electromagnetic interference increases
Solution Approach 1:
The conductive foam sealing member acts as a flexible electromagnetic shield that conforms to the cables passing through it, maintaining shielding effectiveness while accommodating multiple cables of various sizes in a compact arrangement.
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 solution provides effective electromagnetic shielding with enhanced flexibility and ease of cable management, allowing for simple introduction, removal, or replacement of cables without disassembling the port, while maintaining long-term EMC performance.
Implementation Method 1
the or each slit is provided in a sealing member, which comprises a resilient conductive material arranged to seal the opening
Implementation Method 2
a port for inhibiting electromagnetic radiation... the sealing member is arranged to seal the opening and to maintain electrical continuity between the enclosure and the sealing member
Data Source
AI summary
A port for inhibiting electromagnetic radiation, the port being arranged to seal an opening and to allow for the passage of one or more electrical cables through the opening, wherein the port comprises at least one slit arranged to engage the one or more cables.