Shielded Cable End Sleeve Clearance for Foil Peeling Detection
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Solution Overview
Problem
The existing end structure and sleeve of shielded cables fail to detect the peeling of a metal foil, which is essential for maintaining desired transmission characteristics, as the foil can interfere with the sleeve during insertion and potentially lead to undesired peeling.
Innovation Solution
The proposed end structure includes a sleeve arranged between the braided wire and the metal foil, with a clearance formed between the sleeve and the sheath, allowing for visual detection of foil peeling by observing a bulge in the braided wire, and features protrusions and a recess to prevent foil peeling and ensure reliable detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sleeve is inserted between the foil and the braided wire, then the foil may interfere with the sleeve to be peeled, but the peeling detection capability is lost
Solution Approach 1:
The patent introduces a spatial dimension by creating a clearance between the sheath end and the sleeve, allowing the braided wire to bulge outward when foil peeling occurs. This dimensional change enables detection of foil peeling through external observation of the bulge, while the sleeve remains positioned to prevent direct interference with the foil.
Solution Approach 2:
The clearance acts as an intermediary space between the sheath and sleeve, allowing the braided wire to move and bulge when foil peeling occurs. This intermediary space enables the detection mechanism without requiring direct contact between the sleeve and foil, thus preventing interference while maintaining detection capability.
2Ease of manufacture
If the sleeve length is reduced to lower costs, then the detection capability is improved, but the structural stability may be compromised
Solution Approach 1:
The patent segments the protective structure into distinct components: the sheath, the clearance space, and the sleeve. This segmentation allows the sleeve to be shorter while maintaining overall structural stability through the distributed arrangement of components and the bulge detection mechanism.
Solution Approach 2:
The structure utilizes the braided wire itself as the detection indicator through self-service. When foil peeling occurs, the braided wire automatically bulges into the clearance space, providing visual detection without requiring additional components or longer sleeve length.
3Reliability
If the clearance between sheath end and sleeve is increased to improve detection, then the structural compactness is reduced
Solution Approach 1:
The patent applies partial action by creating a localized clearance only at the end portion where detection is needed, rather than increasing the entire structure's dimensions. The clearance is sufficient for bulge detection but minimized to maintain overall structural compactness.
Data Source
AI summary
An end structure of a shielded cable 10 includes a core 11, an insulator 12 for covering the core 11, a foil 13 for covering the insulator 12, a braided wire 14 for covering the foil 13, a sheath 15 for covering the braided wire 14 and a sleeve 17 arranged between the braided wire 14 and the foil 13 exposed from an end part of the sheath 15. The end part of the sheath 15 and the sleeve 17 are separated from each other to form a clearance 50.