Flexible Flat Cable Fuse Structure for Overcurrent Protection
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Solution Overview
Problem
Current flexible flat cables (FFCs) lack circuit protection, allowing overcurrent to pass through and failing to safeguard electronic components.
Innovation Solution
Incorporating a circuit protection structure with a smaller cross-sectional area (second line width) between two circuit conductive parts (first line width) in the flexible flat connection cable, which fuses to create a broken circuit when excessive current is detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a circuit protection structure with smaller line width is added to the flexible flat cable, then circuit protection capability is improved, but the device complexity increases
Solution Approach 1:
The circuit protection structure is integrated directly into the flexible flat cable by forming a protection part with smaller line width within the same cable body. The insulation covering component encompasses both the conductive parts and the protection part, merging multiple functions (signal transmission and circuit protection) into a single integrated structure, thereby improving reliability without proportionally increasing device complexity.
Solution Approach 2:
The flexible flat cable is designed to perform multiple functions: it serves as both a signal transmission medium and a circuit protection device. The circuit protection structure with varying line widths enables the cable to automatically protect against overcurrent while maintaining its primary function of electrical connection, eliminating the need for separate protection components.
2Reliability
If the circuit protection part has a smaller line width, then the protection effect is improved, but the current carrying capacity of that section is reduced
Solution Approach 1:
The circuit protection structure employs local quality variation by having different line widths at different sections. The protection part has a smaller line width (second line width) compared to the conductive parts (first line width), creating a deliberate weak point that will fuse first under overcurrent conditions. This localized property change enables the cable to protect the overall circuit while maintaining adequate current capacity in the non-protection sections.
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 circuit protection structure effectively prevents overcurrent damage by forming a broken circuit, thereby protecting electronic components and ensuring safe operation.
Implementation Method 1
When the current passing through the flexible flat cable is excessive, the circuit protection structure is fused to form a broken circuit
Data Source
AI summary
A flexible flat connection cable with an effect of circuit protection and a manufacturing method thereof are provided. The flexible flat connection cable with the effect of circuit protection may be implemented by stamping techniques, etching techniques or laser engraving techniques and include a plurality of flexible flat conductive wires and an insulation covering component. Each flexible flat conductive wire includes at least one circuit protection structure which includes two circuit conductive parts, a circuit protection part disposed between the two circuit conductive parts, and two circuit connection parts each of which is connected to the circuit conductive part and the circuit protection part. The circuit conductive part has a first line width, and the circuit protection part has a second line width less than the first line width. The insulation covering component encompasses the circuit protection structures of the plurality of flexible flat conductive wires.