Sliding Rotating Back Cover Module for EMI Shielding Openings
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Solution Overview
Problem
The existing solutions for server casings with expansion modules result in waste and pollution due to the need for removable iron masks to shield electromagnetic waves, which are not environmentally friendly.
Innovation Solution
A back cover module with a fixing bracket, sliding bracket, and rotating mask design that allows the rotating mask to be moved and rotated to shield the back opening of the casing without being removed, using a sliding slot and position-limiting spring arm mechanism to facilitate easy installation and shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a removable iron mask is used to fill the back opening, then electromagnetic shielding is achieved, but the iron mask must be removed and discarded causing waste and pollution
Solution Approach 1:
The iron mask is transformed from a static removable component to a dynamic integrated component that can rotate between an exposed position (when not needed) and a shielding position (when needed). The rotating mechanism allows the same component to serve both purposes without removal or disposal.
Solution Approach 2:
The back cover module integrates multiple functions: the iron mask serves both as a decorative back cover and as an electromagnetic shielding component. The sliding bracket and rotating mechanism enable the same structure to provide both structural support and electromagnetic shielding functionality.
2Object-affected harmful factors
If the iron mask is fixed to the casing, then electromagnetic shielding is maintained, but the expansion module cannot be installed or removed
Solution Approach 1:
The back cover assembly is segmented into multiple independent components: the fixed back cover body, the removable expansion module, and the rotating iron mask. This segmentation allows each component to perform its specific function independently - the expansion module can be removed while the iron mask remains in place to maintain shielding.
Solution Approach 2:
The iron mask is designed with rotational movement capability, allowing it to dynamically adjust between covering and exposing the back opening. This dynamic feature enables the shielding function to be activated or deactivated without removing the entire back cover or affecting expansion module installation.
3Ease of manufacture
If a simple iron mask is used, then manufacturing is easy, but electromagnetic shielding effectiveness is insufficient
Solution Approach 1:
The iron mask is constructed using composite material structure combining iron powder mixed with plastic material. This composite approach maintains ease of manufacturing through injection molding while achieving effective electromagnetic shielding through the conductive iron powder particles that dissipate electromagnetic energy.
Solution Approach 2:
The back cover module uses composite materials including iron powder, plastic base material, and rubber sealing material. These composite materials provide both structural integrity and electromagnetic shielding properties while remaining manufacturable through standard injection molding processes.
Data Source
AI summary
A back cover module adapted to be disposed on a casing having a back opening is provided. The back cover module includes a fixing bracket, a sliding bracket and a rotating mask. The sliding bracket is slidably disposed on the fixing bracket along a first direction. The rotating mask is pivoted to the sliding bracket. When the fixing bracket is fixed to a position of the casing adjacent to the back opening, the fixing bracket and the sliding bracket are adapted to be inside the casing and a portion of the rotating mask is exposed from the casing. The rotating mask is adapted to follow the sliding bracket and move relative to the fixing bracket toward the first direction to a position out of the casing, and is adopted to rotate relative to the sliding bracket and shield the back opening after being moved out of the casing.