Backshell Biasing Member for Electrical Connector Shielding
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Solution Overview
Problem
Existing electrical connectors face challenges in maintaining low resistance between the backshell and shielding, which is crucial for effective shielding against electromechanical and radio frequency interference, as typical mounting methods fail to meet stringent performance specifications.
Innovation Solution
A connector assembly with a biasing member that exerts a force to increase contact area between the connector body and backshell, utilizing threaded fasteners to reduce resistance and enhance ground shield performance by securing a shield around electrical conduits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If typical mounting methods are used to attach the connector to the backshell, then the device complexity is reduced and ease of manufacture is improved, but the ground path resistance becomes too high to meet shielding specifications
Solution Approach 1:
A biasing member is introduced as an intermediary component between the connector and backshell. This biasing member actively applies force to maintain optimal contact pressure, ensuring low resistance ground path while the connector and backshell themselves remain relatively simple in structure. The biasing member mediates the interaction to achieve reliable electrical contact without complex integrated mounting features.
2Reliability
If typical mounting methods are used to attach the connector to the backshell, then the ease of manufacture is improved, but the contact surface area and contact pressure are insufficient to achieve desired ground shield performance
Solution Approach 1:
The biasing member is designed to automatically apply the necessary contact force when the connector is inserted into the backshell. The spring or elastic element self-adjusts to maintain optimal contact pressure without requiring external adjustment mechanisms or complex assembly procedures. This self-service approach ensures reliable ground shield performance while keeping the assembly process straightforward.
3Reliability
If higher contact pressure is applied between connector and backshell to reduce resistance, then the ground shield performance is improved, but the risk of deformation and damage to components increases
Solution Approach 1:
The biasing member provides dynamic, adjustable contact pressure rather than fixed rigid contact. The spring or elastic element can compress and expand to maintain optimal force, adapting to variations in component dimensions and wear over time. This dynamic approach ensures consistently low resistance while distributing force to prevent localized deformation or damage to the connector or backshell.
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 achieves reliable EMI and RFI shielding with reduced ground path resistance, meeting performance requirements by ensuring a large surface area of contact at a desired pressure, thereby maintaining uniform and dependable shielding performance.
Implementation Method 1
A disclosed example connector assembly includes a connector mounted within a backshell and a biasing member that forces the connector into contact with a surface of the backshell to improve ground shield junction performance
Implementation Method 2
Such shielding provides a ground path that dissipates and prevents outside electrical signals from interfering with the electrical communication through the electrical conductor
Data Source
AI summary
A connector assembly includes a connector mounted within a backshell and a biasing member that forces the connector into contact with a surface of the backshell to improve ground shield junction performance. The biasing member extends into an internal space defined by the backshell and exerts a biasing force to reduce resistance between the connector and the backshell. The reduced resistance provided by the biasing member improves ground shield junction performance against electromechanical interference (EMI) and radio frequency interference (RFI).