Bent Flat-Surface Fuse Element for Stable Fusing
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Solution Overview
Problem
Conventional fuses with wave-like shaped fuse elements suffer from reduced fusing characteristics due to electrical and thermal interference between close fuse parts, deformation during manufacturing, and instability in position and orientation within the casing.
Innovation Solution
A fuse design featuring a fuse element with first and second flat surfaces shaped linearly along the longitudinal direction, connected via a bent section, which enhances rigidity and prevents electrical and thermal interference, while being easily manufactured and maintaining stable fusing characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the fuse element has a wave-like shape to fit the casing, then the fuse element can be housed in the casing, but the distance between fuse parts becomes short causing electrical or thermal interference and degradation of fusing characteristic
Solution Approach 1:
The fuse element transitions from a two-dimensional wave-like shape to a three-dimensional linear configuration with multiple flat surfaces extending in different directions. This dimensional change allows fuse parts to be distributed more effectively in space, increasing the distance between adjacent fuse parts and eliminating electrical or thermal interference while maintaining compact housing within the casing.
2Length of moving object
If the fuse element is bent like a wave to contract the overall length, then the fuse element fits in the casing, but deformation occurs during manufacturing due to external forces
Solution Approach 1:
The fuse element is divided into multiple flat surfaces (first flat surface, second flat surface, etc.) connected by bent sections. This segmentation into rigid planar segments linked by controlled bends provides structural stability during manufacturing, preventing unwanted deformation while allowing the element to be housed compactly in the casing.
3Length of moving object
If the fuse element is bent like a wave, then the overall length contracts, but the position and orientation in the casing become unstable
Solution Approach 1:
By configuring multiple flat surfaces to extend in different directions rather than creating a simple wave-like curve, the fuse element achieves compact length while gaining positional and orientational stability. The linear arrangement of flat surfaces in three-dimensional space provides stable registration features that prevent movement within the casing.
4Volume of stationary object
If fuse parts are positioned close together to save space, then the casing size is reduced, but electrical or thermal effect between fuse parts occurs
Solution Approach 1:
The linear configuration of multiple flat surfaces extends fuse parts in different spatial directions rather than arranging them in a compact wave pattern. This dimensional arrangement maintains adequate spacing between fuse parts to prevent electrical or thermal interference while keeping the overall casing volume compact and efficient.
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 stabilizes the fusing characteristic, prevents deformation during manufacturing, and effectively extinguishes arcs by positioning fuse parts closer to the center of the casing, reducing the risk of damage and improving arc extinguishing performance.
Implementation Method 1
when an unintended overcurrent flows in an electric circuit, a fuse part of a fuse element built into the fuse melts under the heat generated by the overcurrent
Implementation Method 2
a fuse part of a fuse element built into the fuse melts under the heat generated by the overcurrent
Implementation Method 3
the first flat surface and second flat surface, which extend in a linear manner along the longitudinal direction, are contiguous to each another via a bent section along the longitudinal direction of the fuse element, and hence the first flat surface and second flat surface are shaped so as to be bent substantially in an L shape, thereby enhancing rigidity
Implementation Method 4
because the fuse parts are arranged near the center of the casing, the arc generated by the fuse part can be extinguished effectively by an arc-extinguishing material
Data Source
AI summary
The present invention provides a fuse that has a stable fusing characteristic and is easily manufactured.A fuse 600 includes: a fuse element 100 that is provided between a pair of terminal parts 110 and has a plurality of fuse parts 120; and a casing 200 for housing the fuse parts 120, wherein the fuse element 100 includes a first flat surface 140 and a second flat surface 150 which are shaped bent along a longitudinal direction P of the fuse element 100 and which extend in a linear manner along the longitudinal direction P, wherein the first flat surface 140 and the second flat surface 150 are provided with the plurality of fuse parts 120, and wherein the first flat surface 140 and the second flat surface 150 are contiguous to one other via a bent section 131.