Optical Transceiver Housing With Movable Covers for EMI Shielding
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Solution Overview
Problem
Existing telecommunications unit housings for optical transceivers face challenges in maintaining effective electromagnetic shielding when some spaces are vacant, leading to inadequate attenuation of electromagnetic interference.
Innovation Solution
A housing design with movable covers that can be biased to cover openings in vacant spaces, reducing the gap between grounded portions and incorporating electrically conductive elements and a protective layer to enhance electromagnetic interference shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If openings are left open in vacant spaces, then ease of operation is improved, but electromagnetic shielding is worsened
Solution Approach 1:
The patent employs movable covers that can dynamically transition between open and closed positions. These covers are biased to automatically cover openings when transceivers are removed, restoring electromagnetic shielding. When transceivers are installed, the covers can be opened for access. This dynamic mechanism resolves the contradiction by adapting the shielding state based on operational needs.
Solution Approach 2:
The biased movable covers provide self-service electromagnetic shielding by automatically returning to the closed position when not in use. The biasing mechanism ensures that the covers self-actuate to cover openings, maintaining shielding without requiring manual intervention. This eliminates the need for additional insulating plugs while preserving electromagnetic interference attenuation.
2Object-affected harmful factors
If insulating plugs are installed in openings, then electromagnetic shielding is improved, but device complexity is worsened
Solution Approach 1:
Instead of static insulating plugs, the patent implements dynamic movable covers that can open and close. This eliminates the need for separate insulating plug components while achieving the same electromagnetic shielding function. The movable cover integrates the shielding function into an existing structural element, reducing overall device complexity.
Solution Approach 2:
The movable covers serve multiple functions: they provide electromagnetic shielding when closed, allow access when opened for transceiver installation/removal, and can be integrated with the housing structure. This multi-functionality replaces the need for dedicated insulating plugs, simplifying the overall device design.
3Object-affected harmful factors
If covers are added to openings, then electromagnetic shielding is improved, but device complexity is worsened
Solution Approach 1:
The patent uses biased movable covers that automatically position themselves to provide shielding. The biasing mechanism ensures the covers are in the closed (shielding) position by default, and they can be easily opened when needed. This dynamic system provides electromagnetic shielding without requiring complex active control mechanisms.
Solution Approach 2:
The biased covers self-regulate their position based on the presence or absence of transceivers. When transceivers are removed, the bias automatically closes the covers to restore shielding. This self-service mechanism eliminates the need for additional control systems or manual intervention, maintaining shielding effectiveness without increasing operational 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
The solution effectively reduces electromagnetic interference emission by minimizing gaps between grounded parts of the housing, even when spaces are vacant, thereby improving overall electromagnetic shielding efficiency.
Implementation Method 1
the housing 100 also has the purpose of ensuring that an appropriate ground connection is established between the housing 100 and a frame (not shown) of the telecommunications unit... any electromagnetic interference generated by the electrical component may be appropriately attenuated before being emitted from the telecommunications unit
Data Source
AI summary
A housing for optical transceivers is provided. The housing comprises a plurality of walls defining a plurality of spaces for receiving optical transceivers, e.g. pluggable optical transceivers. The housing defines a plurality of openings into the respective spaces. The housing further comprises a cover movably coupled to one of the walls, the cover movable relative to the one of the walls in order to cover one of the openings, when the space corresponding to the opening is vacant.