Cylindrical Shield Covers for Electric Wire
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Solution Overview
Problem
Conventional electric cables with shield connectors require multiple components and increased assembly time due to the use of braids and shield rings, which are prone to damage from vibrations, and often necessitate separate manufacturing of shield pipes for protection.
Innovation Solution
The electric cable employs two cylindrical shield covers made of conductive metal plates, with one end fixed to the shield shells and the other end as a free end, allowing them to abut or lap each other for enhanced shielding, reducing the number of components and assembly time, while providing impact resistance and movability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a braid is used as the shield cover and shield rings are caulked to fix both ends of the braid to the shield shells, then shielding ability is ensured, but the number of components increases and assembling man-hours increase
Solution Approach 1:
The shield cover is integrated with the shield shell to form a unified structure, eliminating the need for separate shield rings and reducing the number of components. The shield cover is directly fixed to the shield shell, combining multiple functions into a single integrated assembly that maintains shielding effectiveness while simplifying the overall structure.
Solution Approach 2:
The shield rings are removed from the structure entirely. The patent extracts this intermediate component and replaces it with a direct fixation method between the shield cover and shield shell, simplifying the assembly process and reducing the number of parts required while maintaining the necessary shielding function.
2Reliability
If a braid is used as the shield cover and fixed with shield rings, then shielding ability is ensured, but the braid is weaker in strength and may be damaged due to vibrations
Solution Approach 1:
The material of the shield cover is changed from a flexible braid to a more rigid structure that provides both shielding ability and mechanical strength. This parameter change in material properties allows the shield cover to resist vibrations and mechanical damage while maintaining its electromagnetic shielding function.
3Strength
If a shield pipe is used to cover the electric wire, then protection is provided, but separate components must be manufactured
Solution Approach 1:
The shield cover is merged with the shield shell to form an integrated structure that provides both protection and shielding. This combination eliminates the need for separate shield pipe components, reducing manufacturing complexity while maintaining the protective function over the electric wire.
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 configuration ensures effective shielding, reduces component count and assembly time, prevents damage from vibrations, and eliminates the need for separate shield pipes, maintaining shielding ability and movability between connectors.
Implementation Method 1
a shield cover provided to cover an outer side of the electric wire between the shielded connectors on both ends thereof... one end of each of the two cylindrical shield covers made of a conductive metal plate is respectively fixed on the shield shells
Implementation Method 2
a conductive elastic member is interposed between the free ends of the two cylindrical shield covers to shield a gap between the free ends and also to prevent a direct contact between the free ends
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3B
AI summary
Shield connectors are respectively attached on both ends of an electric wire 30, and also two cylindrical shield covers 13 and 23 made of a conductive metal plate are provided to cover an outer side of the electric wire between the shield connectors. One end of each of the cylindrical shielding covers 13 and 23 is respectively fixed to shield shells 12 and 22 of the shielded connectors 10 and 20, and the other end of each of the cylindrical shielding covers 13 and 23 are formed as a free end, and the free ends are ether abutted to each other or lapped on each other.