Shielded Wire Segmented Tape for Wear and Airtightness
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Shielded electric wires face challenges in achieving both wear resistance and airtightness due to high bending stress when thick sheet-shaped members are used, leading to potential peeling issues that compromise airtightness.
Innovation Solution
The use of two sheet materials with adhesive layers, each wider than half the circumferential distance of the shielding member, opposingly stuck with extra length portions protruding on both sides, and a laminated protective tape wound in multiple layers, reduces bending stress and enhances wear resistance and airtightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a thick sheet-shaped member is used to ensure wear resistance, then wear resistance is improved, but bending stress increases causing peeling and compromising airtightness
Solution Approach 1:
The sheet-shaped member is divided into two separate sheet materials (first sheet material and second sheet material) that are opposingly attached to the shielding layer. This segmentation reduces the bending stress on each individual sheet material compared to using a single thick sheet, thereby preventing peeling while maintaining wear resistance through the combined structure of both sheets.
2Reliability
If adhesive layers are opposingly attached to provide airtightness, then airtightness is improved, but bending stress causes peeling from the root of the opposingly stuck portion
Solution Approach 1:
The adhesive attachment structure is segmented into two separate sheet materials with adhesive layers on their inner surfaces. These adhesive layers are opposingly attached to form an airtight seal, while the opposing configuration distributes bending stress across both sheets rather than concentrating it in a single thick sheet, preventing peeling at the roots of the opposingly stuck portions.
3Device complexity
If a single sheet material is used for the sheet-shaped member, then device complexity is reduced, but it cannot simultaneously satisfy wear resistance and airtightness requirements
Solution Approach 1:
The sheet-shaped member is segmented into two sheet materials with opposite attachment orientations. This segmentation enables the structure to simultaneously achieve wear resistance (through the combined thickness and protective coverage) and airtightness (through opposingly attached adhesive layers that seal against the shielding layer), satisfying multiple performance requirements that a single sheet material cannot achieve alone.
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 effectively decreases the likelihood of peeling while maintaining airtightness and improving wear resistance, allowing the shielded electric wire to meet both target values.
Implementation Method 1
one surface of each of the first and second sheet materials is formed with an adhesive layer, the first and second sheet materials are stuck on the shielding member with the shielding member sandwiched between the first and second sheet materials
Data Source
AI summary
A shielded electric wire includes an electric wire; a shielding member that forms a shielding layer by covering a periphery of the electric wire; a sheet-shaped member that covers a periphery of the shielding member; and a protective member spirally wound on a periphery of the sheet-shaped member. The sheet-shaped member includes a first sheet material and a second sheet material. One surface of the first and second sheet materials is formed with an adhesive layer. The first and second sheet materials have a width longer than a half circumferential distance of the shielding member provided on the periphery of the electric wire, and are stuck on the shielding member to sandwich the shielding member. The adhesive layers of the first and second sheet materials are opposingly stuck in extra length portions protruding the shielding member in a width direction.