Crimp Section With Band-Shaped Recess For Conductive Sheet
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing connection fittings for electrically conductive sheets, such as those using braided wires, face challenges in achieving both low connection resistance and high fixing strength, leading to difficulties in effectively connecting metal cloth or metal foil as current transmitting mediums in vehicles.
Innovation Solution
A crimp section with a band-shaped recess and inclined surfaces is used in the connection fitting, allowing for a strong yet flexible attachment to the electrically conductive sheet material, reducing loosening due to springback and ensuring a stable connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the holding force of the two metal members that sandwich the sheet material is increased to ensure sufficient fixing strength, then the fixing strength is improved, but the sheet material is compressed excessively and connection resistance increases
Solution Approach 1:
The connection fitting has a non-uniform cross-sectional shape with a wider first section and a narrower second section. This local variation in geometry allows the fitting to apply different pressures to the sheet material at different locations, achieving both sufficient fixing strength in the wider section and reduced compression in the narrower section to maintain low connection resistance.
Solution Approach 2:
The connection fitting changes its geometric parameters along its length, transitioning from a wider first cross-sectional shape to a narrower second cross-sectional shape. This parameter change enables the fitting to optimize the balance between fixing strength and connection resistance by controlling the distribution of holding force across different sections of the sheet material.
2Reliability
If the holding force is reduced to prevent excessive compression of the sheet material, then connection resistance is reduced, but fixing strength becomes insufficient
Solution Approach 1:
The connection fitting employs a non-uniform cross-sectional shape where the first section is wider and the second section is narrower. This local quality variation allows the wider section to provide strong fixing force while the narrower section reduces compression, thereby simultaneously achieving low connection resistance and sufficient fixing strength.
Solution Approach 2:
The fitting's cross-sectional dimensions are changed along its length, creating a gradient in holding force. The transition from a wider first section to a narrower second section optimizes the distribution of pressure, ensuring adequate fixing strength where needed while minimizing compression to maintain low connection resistance.
3Device complexity
If conventional ring-shaped fixing members are used to connect the sheet material, then the connection structure is simple, but it is difficult to achieve both low connection resistance and high fixing strength simultaneously
Solution Approach 1:
The connection fitting is segmented into distinct sections with different cross-sectional shapes - a wider first section and a narrower second section. This segmentation allows each part to perform its specific function: the wider section provides fixing strength while the narrower section minimizes compression, achieving superior connection performance without increasing overall structural complexity.
Solution Approach 2:
The connection fitting incorporates a dynamic geometric transition from a wider first cross-section to a narrower second cross-section. This dynamic shape variation enables the fitting to adapt the holding force distribution, optimizing both fixing strength and connection resistance while maintaining a relatively simple overall structure.
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 design achieves a balance between low connection resistance and high fixing strength, reducing the pressure required for crimping and preventing contact failures, while maintaining durability and flexibility, suitable for harsh vehicle environments.
Implementation Method 1
a crimp section that is crimped to an edge section of the sheet material
Implementation Method 2
the band-shaped recess being band-shaped by being more strongly crimped to the sheet material than other parts
Data Source
AI summary
A fitting-equipped electrically conductive sheet and a connection fitting configured to electrically connect to another member, in which both a low connection resistance and a high fixing strength are easily achieved. The connection fitting has a crimp section that is crimped to an edge section of the electrically conductive sheet material. The crimp section includes a pair of plate-shaped holding sections between which the edge section of the sheet material is sandwiched, and a folded-back section that connects them. One of the pair of plate-shaped holding sections has a band-shaped recess on an outer surface of an intermediate region between the folded-back section and the opposite edge section, the band-shaped recess being band-shaped by being more strongly crimped to the sheet material than other parts.