Cable Assembly Ferrule Crimping for Shielding Integrity
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Solution Overview
Problem
Existing cable assemblies face challenges in providing sufficient retaining force to secure high-speed transmission cables without damaging the inner structure due to excessive deformation, particularly with increased wire counts and the need for shielding.
Innovation Solution
A cable assembly design featuring an external cover with a retaining cavity, ring-shaped reinforcement members, and a ferrule crimped around the cables' front segments, sandwiching the metallic braiding between the ferrule and reinforcement members for secure mechanical connection and protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cable is secured in the cable outlets of the covers, then the cable is held firmly and not separated easily, but the inner structure of the cable may be damaged if the cable deforms excessively
Solution Approach 1:
The patent introduces a ferrule as an intermediary component between the cable and the cover. The ferrule is crimped onto the cable's metallic braiding and retained in the retaining cavity, acting as a mediator that transfers the securing force from the cover to the cable without allowing excessive deformation of the cable's inner structure. This resolves the contradiction by providing firm holding while protecting the cable interior.
Solution Approach 2:
The patent segments the cable structure by introducing the ferrule as a separate component that interfaces with the metallic braiding. This segmentation allows the ferrule to bear the mechanical stress of securing the cable, isolating the stress from the cable's inner wires and shielding layer, thus preventing damage while maintaining secure connection.
2Reliability
If more wires and shielding layers are added to the cable for high-speed transmission, then the shielding and protection are improved, but the cable structure becomes more complex and requires more retaining force
Solution Approach 1:
The ferrule serves multiple functions: it mechanically secures the cable to the cover, provides structural reinforcement for the cable assembly, and maintains the positioning of the cable within the retaining cavity. This multi-functionality addresses the increased complexity from added wires and shielding by providing a single component that handles multiple requirements.
Solution Approach 2:
The cable structure comprises multiple layers including wires, insulation, metallic braiding for shielding, and the ferrule for mechanical support. This composite structure combines different materials and functions, where the ferrule works with the metallic braiding to provide both electrical shielding and mechanical security, managing the complexity through integrated material design.
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 provides a reliable and secure mechanical connection while preventing excessive deformation of the cables, ensuring reliable grounding and shielding, thus addressing the need for improved cable assembly designs for high-speed transmission.
Implementation Method 1
a ferrule crimped to the front segments of the two cable and encircling the reinforcement members
Data Source
AI summary
An cable assembly includes an external cover having a back wall defining a retaining cavity; at least one printed circuit board accommodated in the external cover; two cables arranged in juxtaposed manner, each cable including a number of wires, a shielding layer shrouding the wires, a metallic braiding enclosing the shielding layer and an insulative jacket enclosing the metallic braiding; two ring shaped reinforcement members, each reinforcement member located between the shielding layer and the metallic braiding of a front segment of the each cable; and a ferrule crimped to the front segments of the two cable and encircling the reinforcement members, the ferrule retained in the retaining cavity, and the metallic braiding of each cable sandwiched between the ferrule and the reinforcement member inside the corresponding cable.