Magnetic attachment device
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Solution Overview
Problem
Existing magnetic clamping devices are insufficient in holding items of significant weight due to the limited strength of their magnets, and they can damage surfaces when applied.
Innovation Solution
A magnetic attachment device with strong, nickel-coated magnets sandwiched between flexible PVC sheets, providing a textured surface for increased friction and a hinge mechanism for versatile clamping, capable of supporting substantial weights up to 20 kg on mild steel surfaces without damaging them.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If magnets of higher strength are used to hold heavier items, then the clamping force increases, but the risk of surface damage increases
Solution Approach 1:
A flexible protective sheet is introduced as an intermediary layer between the strong magnet and the surface. This sheet distributes the magnetic force over a larger area and prevents direct contact between the magnet and the surface, thereby maintaining high clamping force while eliminating surface damage risk.
Solution Approach 2:
The patent employs flexible protective sheets that conform to the surface geometry while distributing magnetic pressure. These thin film structures provide both protection and adaptability, allowing the device to maintain effective clamping without damaging delicate surfaces.
2Force
If magnets are made stronger to support substantial weight, then the holding capacity increases, but the device complexity increases
Solution Approach 1:
The device is segmented into distinct functional modules: magnetic elements for holding, flexible protective sheets for surface protection, and textured inner surfaces for friction enhancement. This modular segmentation allows each component to be optimized independently while maintaining overall simplicity.
Solution Approach 2:
The patent combines multiple materials with complementary properties: strong magnets for holding force, flexible PVC or rubber for protection and adaptability, and textured materials for friction. This composite approach achieves high holding capacity through material properties rather than complex mechanical structures.
3Reliability
If a textured surface is added to increase friction and prevent slipping, then the grip on held items improves, but the manufacturing complexity increases
Solution Approach 1:
The textured surface is applied locally only to the inner surfaces that contact held items, rather than the entire device. This localized texturing provides friction enhancement exactly where needed while keeping other surfaces smooth and easy to manufacture.
Solution Approach 2:
The patent modifies the surface parameter (roughness/texturing) of the inner surfaces to increase the coefficient of friction. This parameter change is achieved through standard manufacturing techniques like embossing or coating, which are simple process modifications rather than complex manufacturing steps.
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 device effectively retains large or heavy items by enhancing magnetic strength and surface protection, ensuring secure clamping and preventing damage to surfaces, with improved durability and longevity.
Implementation Method 1
Each magnet can preferably support 12 kg (+/â20%) pull vertically (a direction parallel with the face of the magnet) when in flush contact with a mild steel surface
Implementation Method 2
The device may also include of a more textured material used on the inside or side of the device that meets the material that is being held, for better resistance against the weight of the object
Implementation Method 3
The magnets are preferably durable, e.g., coated with three layers of nickel, copper, and nickel to reduce corrosion and provide a smooth finish which greatly increase the longevity of the Magnets
Data Source
AI summary
A clamping device is provided that includes a first magnetic disc and a second magnetic disc, each of the discs located on a first sheet of flexible material a distance apart vertically and covered by at least a second sheet of flexible material, the first sheet of flexible material forming a hinge between the first and the second magnetic discs, and an outer surface of the clamping device. The second sheet of flexible material forms an inner surface of the clamping device and the inner surface of the clamping device has a textured surface thereon.