Multipolar Fusible Link Non-Uniform Bus Bar Height
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Solution Overview
Problem
Existing multipolar fusible links face a trade-off between height and lateral width, making it difficult to achieve a compact design without increasing either dimension, which limits design flexibility and fabrication efficiency.
Innovation Solution
A multipolar fusible link with a non-uniform bus bar height that decreases towards the end edge, allowing for a larger space to change the shape of fusible sections, thereby reducing both overall height and lateral width, enabling more flexible design and increased fabrication yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the angle between the arms of a fusible section is decreased to reduce height, then the height of the fusible section decreases, but the lateral width of the fusible section increases
Solution Approach 1:
The bus bar is designed with non-uniform height along its length, creating different local spaces for different fusible sections. The height of the bus bar decreases from the input terminal toward the end edge, allowing fusible sections connected to the lower edge to have varied shapes and sizes optimized for their specific ratings, rather than requiring uniform dimensions across all sections
Solution Approach 2:
The invention utilizes the height dimension of the bus bar to accommodate fusible sections of different sizes and shapes. By varying the bus bar height along its length, the design provides vertical space that allows fusible sections to maintain smaller lateral widths while achieving reduced heights through optimized arm angles
2Length of moving object
If the shape of fusible sections is changed to reduce lateral width, then the overall lateral width of the multipolar fusible link decreases, but the height of the fusible sections increases
Solution Approach 1:
Each fusible section is designed with local optimization based on its position and rating. The bus bar's non-uniform height allows different fusible sections to have different shapes - some can use smaller arm angles for reduced height, while others can use larger arm angles for reduced lateral width, depending on the available vertical space at their specific location
3Ease of manufacture
If the height of the bus bar is made uniform, then the manufacturing process is simplified, but the design flexibility for accommodating different fusible section shapes is reduced
Solution Approach 1:
The bus bar is designed with non-uniform height along its length, creating different local spaces for different fusible sections. The height of the bus bar decreases from the input terminal toward the end edge, allowing fusible sections connected to the lower edge to have varied shapes and sizes optimized for their specific ratings, rather than requiring uniform dimensions across all sections
Solution Approach 2:
The invention changes the height parameter of the bus bar from a constant value to a variable value that changes along the length of the bus bar. This parameter change enables the accommodation of fusible sections with different geometries and ratings while maintaining manufacturing feasibility through a systematic height variation pattern
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 allows for a smaller overall height and lateral width, enabling the multipolar fusible link to be installed in compact fuse boxes and increasing the number of links that can be fabricated from a single metal plate, while maintaining design flexibility.
Implementation Method 1
If an unexpected high current flows through one of the electric circuits, the corresponding fusible section 230 is heated and blown by the high current
Data Source
Figure 1
Figure 2
Figure 3(a)~3(b)
AI summary
The invention in this application aims to provide a multipolar fusible link in which its lateral width can decrease while its entire height does not increase. A multipolar fusible link (100) includes: an input terminal (110); a bus bar (120) through which an electric current input from the input terminal (110) flows; and a plurality of terminals (140) connected to the bus bar (120) via fusible sections (130). By changing a shape of a lower edge (122) of the bus bar (120) to which the fusible sections (130) are connected, a width between the lower edge (122) and an upper edge (121) positioned opposite the lower edge (122) is changed in accordance with the fusible sections (130) connected to the lower edge (122). In addition, shapes of the fusible sections (130) connected to the lower edge (122) are changed so that their lateral widths decrease.