Keyed Receptacle Cage Structure for Correct Pluggable Module Mating
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Solution Overview
Problem
Existing communication systems require costly and complex cutouts in panels to align polarization features between high-speed pluggable modules and receptacle cages, leading to increased system complexity and cost.
Innovation Solution
The implementation of a receptacle cage with shielding walls and a hood that includes a cage polarization slot and EMI gasket with deflectable spring fingers, allowing for keyed mating of pluggable modules with receptacle cages, ensuring correct orientation and preventing incorrect mating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a polarization feature (post or tab) is added to the pluggable module to restrict loading into older receptacles, then mating correctness is improved, but system complexity and cost increase due to required panel cutouts
Solution Approach 1:
The invention moves the polarization feature from a protruding post/tab configuration requiring panel cutouts to a recessed slot configuration in the receptacle cage. This dimensional change allows the polarization feature to be integrated within the cage structure itself, eliminating the need for additional panel modifications while maintaining mating correctness.
Solution Approach 2:
The cage polarization slot is nested within the receptacle cage structure, with the slot formed in the cage wall and the polarization feature received within the cage interior. This nesting integrates the polarization function into the existing cage geometry rather than requiring separate external features.
2Reliability
If a polarization feature (post or tab) is added to the pluggable module to restrict loading into older receptacles, then mating correctness is improved, but manufacturing cost increases
Solution Approach 1:
The invention changes from a protruding polarization feature requiring panel cutout operations to a recessed slot feature that can be formed directly in the cage wall during cage manufacturing, eliminating additional manufacturing steps and associated costs.
Solution Approach 2:
The polarization slot feature is merged with the cage wall structure, forming an integrated component rather than separate parts. This consolidation reduces the number of manufacturing operations required and eliminates the need for additional panel modifications.
3Reliability
If deflectable spring fingers are added to the EMI gasket for keyed mating, then mating correctness is improved, but device complexity increases
Solution Approach 1:
The deflectable spring fingers serve multiple functions: they provide EMI shielding through the gasket structure and simultaneously provide keyed mating through the polarization slot alignment. This multi-functionality integrates two features into a single component rather than requiring separate mechanisms.
Solution Approach 2:
The spring fingers are made deflectable to allow dynamic adjustment during the mating process, enabling the module to be inserted with proper alignment while preventing incorrect orientations through the polarized slot geometry.
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
This solution simplifies the system by enabling correct mating of pluggable modules with receptacle cages, reducing complexity and cost while preventing mechanical and electrical misconnections that could damage components or cause improper system operation.
Implementation Method 1
The EMI gasket has a plurality of deflectable spring fingers
Data Source
AI summary
A receptacle cage includes shielding walls forming a module channel configured to receive a pluggable module. The shielding walls include a first end wall, a first side wall extending from the first end wall and a second side wall extending from the first end wall opposite the first side wall. The first end wall, the first side wall and the second side wall form the module channel. The receptacle cage includes a hood extending from the first end wall forming a chamber located outside of the module channel. The receptacle cage includes a cage polarization slot formed in the first end wall at a first distance from the first side wall. The cage polarization slot is open to the chamber. The cage polarization slot is configured to receive a module polarization feature of the pluggable module such that the module polarization feature is located in the chamber and covered by the hood.