Split Shield Cable Fixing Structure for Stable Grounding
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Solution Overview
Problem
Conventional shielded connector systems are costly due to the use of facilities like cores and crimping dies, and there is a risk of deformation leading to unstable connections and potential damage to electric wires.
Innovation Solution
A shielded cable fixing structure using split shield shells formed from sheet metal, which eliminates the need for cores and crimping dies, featuring a braid fixing member and annular mounting grooves to securely fasten the braid without deformation, ensuring stable connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a shield shell is manufactured by die-casting to eliminate cores and crimping dies, then manufacturing cost is reduced and assembly is simplified, but the weight is increased and manufacturing cost becomes excessively expensive
Solution Approach 1:
The shield shell is divided into two separate half-cylindrical shells that are assembled together. This segmentation allows the use of lighter sheet metal materials instead of heavy die-cast materials, while maintaining the protective function. The split design enables easier assembly and disassembly without requiring complex manufacturing processes.
Solution Approach 2:
The invention changes the material parameter from heavy die-cast material to lighter sheet metal material. This parameter change reduces the weight of the shield shell while maintaining its structural integrity and protective function, resolving the contradiction between ease of manufacture and weight.
2Reliability
If cores and crimping dies are used to crimp the shield ring, then connection stability is improved, but manufacturing cost increases and facilities are required
Solution Approach 1:
The invention extracts and eliminates the need for cores and crimping dies from the assembly process. The braid fixing member is designed to secure the braid directly through friction and mechanical interlocking, removing the requirement for expensive crimping facilities and reducing device complexity while maintaining connection stability.
Solution Approach 2:
The braid fixing member is designed to self-secure the braid through its groove structure and friction fit, without requiring external crimping tools or cores. The structure performs its own fixing function, eliminating the need for additional facilities and reducing assembly complexity.
3Strength
If the shield shell is deformed during crimping, then crimping force is applied to secure the braid, but fitting stability and grounding become unstable and wire damage may occur
Solution Approach 1:
Instead of applying external crimping force that deforms the shield shell, the invention inverts the approach by having the braid fixing member naturally grip the braid through friction and mechanical interlocking in the groove. This eliminates the need for deforming forces and prevents shield shell deformation, maintaining fitting stability and grounding reliability.
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 reduces manufacturing costs, simplifies assembly, and enhances connection stability by eliminating the need for crimping and expensive die-casting, while preventing deformation and wire damage.
Implementation Method 1
a groove-shaped portion press-formed on a section of each of the split shield shells
Data Source
AI summary
A shielded cable fixing structure includes a shielded cable that includes an electric wire, a braid for covering the electric wire, and a sheath for covering the braid, an insulation housing that receives a terminal fitting electrically connected to the electric wire, a pair of split shield shells in which the insulation housing is mounted, a groove-shaped portion press-formed on a section of each of the split shield shells to cover a wire lead-out port of the insulation housing, from which the electric wire is led out, and is recessed on an outer surface of each of the split shield shells, and a braid fixing member fixed on an annular mounting groove constituted by the groove-shaped portions of the split shield shells, in a state where the braid is disposed between the annular mounting groove and the braid fixing member.