Coaxial Flat Cable Terminal Structure for Stress-Diffused Solder Joints
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Solution Overview
Problem
Conventional coaxial flat cables suffer from stress concentration at soldered parts due to handling, leading to damage and deterioration in high-frequency transmission characteristics.
Innovation Solution
A coaxial flat cable design featuring a resin tape bonded to terminal parts, with fixed parts at both ends to distribute stress, preventing concentration on soldered connections between the center and external conductors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the coaxial flat cable is handled after soldering, then the cable can be installed and used, but stress concentrates on the soldered parts of the external conductor and center conductor, causing damage and deterioration in high-frequency transmission characteristics
Solution Approach 1:
A resin tape is introduced as an intermediary component between the coaxial cables and the external environment. The resin tape absorbs and distributes handling stress across its entire area, preventing stress concentration at the soldered connection parts. The resin tape acts as a stress-dissipating layer that protects the vulnerable soldered joints while allowing the cable to be handled and installed.
2Device complexity
If the resin tape is bonded only to the terminal parts, then the cable structure is simplified, but stress distribution is insufficient and soldered parts remain vulnerable
Solution Approach 1:
The resin tape extends not only in the longitudinal direction covering the terminal parts but also in the width direction beyond the outer perimeters of the coaxial cables. This dimensional extension creates an overlapping region that acts as a stress-distributing zone, spreading handling stress across a larger area and preventing concentration at the soldered connection parts while maintaining structural simplicity.
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 design effectively distributes stress across the resin tape, preventing damage to soldered connection parts and maintaining stable high-frequency transmission characteristics.
Implementation Method 1
the resin tape positioned at the terminal parts is provided with a fixed part, fixed (engaged, fitted, crimped, caulked, or the like) to the substrate or the connector, at both end portions in the width direction, making it possible to receive the applied stress across the entire resin tape and thus prevent stress from being applied to a specific coaxial cable
Data Source
AI summary
To provide a coaxial flat cable that can achieve stable high-frequency transmission characteristics as a structure by which stress is not applied to a specific coaxial cable, even due to handling of the coaxial flat cable or the like. The above-described problem is solved by a coaxial flat cable (20) comprising a plurality of coaxial cables (10) disposed side by side in a width direction (X), and a resin tape (11) integrating at least terminal parts (21) of these coaxial cables (10) from one surface or both surfaces, each of the plurality of coaxial cables (10) being connected by soldering to a substrate (30) or a connector. The resin tape (11) positioned at the terminal parts (21) is configured to be provided with a fixed part (21a), to be fixed to the substrate or the connector, at both end portions in the width direction (X).