Leverless Magnetic Hook With Recessed Magnet for Scratch-Free Holding
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Solution Overview
Problem
Existing magnetic hooks for attaching to ferromagnetic objects often require levers or pivoting components, which can scratch the surface and limit the weight they can hold, and do not maximize magnetic force effectively.
Innovation Solution
A leverless magnetic hook design with a magnetic device positioned within the body, a grip material to prevent sliding, and a configuration that maximizes normal force without touching the ferromagnetic surface, using a high-coefficient-of-friction material to enhance holding capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If lever or pivoting components are used in magnetic hooks, then the hook can be detached from the ferromagnetic object, but the surface of the ferromagnetic object may be scratched and the weight holding capacity is limited
Solution Approach 1:
The patent removes the lever or pivoting components from the magnetic hook design, extracting the harmful mechanical contact elements that cause surface scratching. The detachment function is achieved through a purely magnetic interaction mechanism where the hook is pulled away from the ferromagnetic surface, eliminating the need for mechanical levers that could damage the surface.
Solution Approach 2:
The patent replaces the mechanical lever or pivoting system with a magnetic field-based detachment mechanism. Instead of using mechanical components to pry the hook off the surface, the detachment is achieved by overcoming the magnetic attraction force through direct pulling, substituting mechanical interaction with magnetic field interaction that does not damage the surface.
2Ease of operation
If lever or pivoting components are used in magnetic hooks, then the hook can be detached, but the weight holding capacity is limited
Solution Approach 1:
The patent removes the lever or pivoting components that limit weight capacity, extracting the structural constraints imposed by mechanical detachment mechanisms. This allows the magnetic hook to be designed with optimized magnetic field distribution and geometry that can support higher weights without the structural weaknesses inherent in lever-based systems.
Solution Approach 2:
The patent replaces the mechanical lever system with a magnetic field-based holding and detachment mechanism. The magnetic field can be optimized to provide uniform and strong holding force across the contact surface, enabling higher weight capacity compared to mechanical levers that create stress concentration points and have structural limitations.
3Force
If the magnetic device touches the ferromagnetic surface, then the magnetic force is maximized, but the surface is scratched or marred
Solution Approach 1:
The patent introduces a non-marring intermediary layer or design feature between the magnetic device and the ferromagnetic surface. This intermediary element allows the magnetic field to penetrate and exert force while preventing direct contact that would cause scratching or marring. The intermediary could be a protective coating, a magnetic shield with soft contact surface, or a design that maintains optimal magnetic coupling without direct hard surface contact.
4Strength
If grip material is added to prevent sliding, then the holding capacity is enhanced, but the device complexity increases
Solution Approach 1:
The patent uses composite material construction where grip material is integrated into the magnetic hook body. The composite structure combines the magnetic properties of the magnetic device with the high-friction properties of the grip material in a unified component, enhancing holding capacity through increased friction while avoiding the complexity of separate assemblies. The grip material may be molded directly onto the magnetic device or integrated into the same manufacturing process.
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 allows for securely hanging heavy items without scratching the surface and maximizes magnetic force, ensuring reliable attachment and easy detachment without marring the ferromagnetic object.
Implementation Method 1
one or more magnets which generate magnetic attraction forces with ferromagnetic objects
Implementation Method 2
the magnetic device is configured to magnetically couple the magnetic hook device to a ferromagnetic object
Implementation Method 3
configured to prevent the magnetic hook device from sliding on the ferromagnetic object
Data Source
AI summary
Leverless magnetic hook devices including a body portion, a hook portion, a magnetic-retaining portion, and a magnetic device. The body portion defines a first surface and a second surface opposite the first surface. The hook portion extends from the first surface of the body portion. The magnet-retaining portion is disposed within at least part of the body portion. The magnetic device defines a first surface coupled to the magnetic retaining portion and a second surface opposite the first surface such that at least a portion of the second surface of the magnetic device extends substantially parallel to and is recessed a distance D from the second surface of the body portion. In this way, the magnetic device is configured to magnetically couple the magnetic hook device to a ferromagnetic object.