Shielded Acoustic Door Frame With Magnetic Gaskets and Grounding
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Solution Overview
Problem
Existing EMI shielding and acoustic attenuation doors face challenges with significant lead-time requirements, difficulty in sealing, and require excessive force to ensure proper closure, leading to gaps that allow sound and electromagnetic waves to leak.
Innovation Solution
An adjustable EMI shielding and acoustic attenuation door system with a door frame and gasketing system that includes adjustable jamb, sill, and head sections, utilizing conductive tape for grounding, and multiple-layered gaskets for enhanced sealing and frequency attenuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional door sealing methods are used, then manufacturing simplicity is maintained, but EMI and acoustic attenuation effectiveness deteriorates due to gaps and misalignment
Solution Approach 1:
The door system divides the sealing function into multiple independent gasket components (head gasket, jamb gaskets, sill gasket) that can be separately installed and adjusted. Each gasket segment addresses specific sealing zones, allowing for targeted EMI and acoustic attenuation without requiring a completely complex integrated system.
Solution Approach 2:
The patent implements nested gasket arrangements where inner gaskets are positioned within outer gasket structures. For example, the head gasket is nested within the head main frame, and jamb gaskets are nested within the jamb sections. This nested configuration provides multiple sealing layers that enhance attenuation effectiveness while maintaining a relatively compact overall structure.
2Adaptability or versatility
If adjustable gasketing systems are implemented, then adaptability to construction variations is improved, but device complexity increases
Solution Approach 1:
The door system incorporates adjustable and movable gasket components that can be dynamically positioned to accommodate construction variations. The jamb sections with adjustable gaskets allow for movement and repositioning during installation and operation, enabling the system to adapt to different door alignments and frame tolerances without requiring a completely complex adjustable mechanism.
Solution Approach 2:
The patent utilizes gasket materials and configurations that can change their physical parameters (compression, expansion, flexibility) to accommodate construction variations. The multi-layer gasket structures can be compressed or expanded during installation to fill gaps and adapt to frame tolerances, providing adaptability through material parameter changes rather than complex mechanical adjustments.
3Reliability
If multiple-layered gaskets are used, then EMI and acoustic attenuation is improved, but ease of operation deteriorates due to increased sealing force requirements
Solution Approach 1:
The door system applies different gasket types and materials at different locations based on specific sealing requirements. For example, magnetic gaskets are used in specific areas to provide sealing force without requiring high mechanical closure force, while other areas use compression-based gaskets. This localized approach to sealing quality allows multiple layers to be effective without uniformly increasing the force required across the entire door closure.
Solution Approach 2:
The patent incorporates magnetic gasketing systems that replace purely mechanical compression-based sealing in certain areas. The magnetic attraction provides sealing force automatically when the door is closed, reducing the reliance on high mechanical closure force and making door operation easier while maintaining effective sealing across multiple layers.
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 system provides effective EMI and acoustic attenuation across various environments by ensuring a complete seal, mitigating leaks, and accommodating construction variations, while maintaining functionality and durability.
Implementation Method 1
conductive tape for grounding the door; the door being grounded when the door is in a closed position against the door frame
Implementation Method 2
flanged magnetic jamb gasket fixed to an acoustical retainer with a fastener; flanged magnetic head gasket fixed to the head main frame
Implementation Method 3
layered jamb gasket at least partially in between the hinge and the jamb main frame; multiple-layered gaskets for enhanced sealing and frequency attenuation
Implementation Method 4
a sill gasket covered by a threshold, the spreader bar and at least one sill gasket contacting a floor shielding; the head EMI gasket at least partially contacts the door when the door is in a closed position
Data Source
AI summary
An EMI shielding and acoustic attenuation door frame and door system, including: a door connected to a door frame with a hinge, the door including a bottom portion having a plate, a door gasket, a door sponge, and conductive tape for grounding the door; the door frame including: a jamb section including: a jamb main frame; a jamb back frame; wherein the jamb main frame and back frame being adjustable along the wall; a layered jamb gasket at least partially in between the door frame and the jamb main frame; a flanged magnetic jamb gasket fixed to an acoustical retainer with a fastener; wherein the door is grounded when the door is in a closed position against the door frame; a sill section including: a spreader bar having at least one sill gasket covered by a threshold, the spreader bar and at least one sill gasket contacting a floor shielding.