Detachable Magnet Assembly With Pivot Release and Adjustable Hold
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Solution Overview
Problem
Existing magnet devices for ferromagnetic surfaces lack versatility and efficiency in attachment and detachment, particularly in providing adjustable magnetic force and minimizing torque while maximizing parallel shear forces, which limits their application in holding various items like framed photographs and artwork.
Innovation Solution
A detachable magnet device with a core housing, a rotatable annular body, and a camming rib system that allows the magnet and baseplate to pivot, enabling adjustable magnetic force and low torque, along with a magnetic sheet design that concentrates flux within an effective zone to attract ferromagnetic items.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the magnet device uses a fixed attachment mechanism, then the magnetic force is stable, but the device lacks versatility and cannot be repositioned
Solution Approach 1:
The patent applies the dynamics principle by introducing a pivotable baseplate that can rotate between a first position (for attachment) and a second position (for detachment). This dynamic mechanism allows the magnet device to be repositioned on ferromagnetic surfaces while maintaining stable attachment when in the first position, thus resolving the contradiction between versatility and reliability
2Force
If the magnet device maximizes magnetic holding force, then items are securely held, but torque increases causing damage to ferromagnetic surfaces
Solution Approach 1:
The patent applies segmentation by dividing the magnetic sheet into multiple island portions with interstitial portions between them. This segmentation distributes the magnetic holding force across multiple contact points, reducing concentrated torque on any single point of the ferromagnetic surface while maintaining overall secure holding capability
Solution Approach 2:
The patent applies local quality by creating specific magnetic pole distributions in the island portions, where each island has north and south poles with magnetic flux flowing through them. This localized magnetic field configuration optimizes the distribution of forces, maximizing holding capability while minimizing harmful torque through the interstitial portions
3Force
If the magnetic sheet covers the entire baseplate, then magnetic force is maximized, but manufacturing complexity and cost increase
Solution Approach 1:
The patent applies the extraction principle by removing material from the magnetic sheet to create interstitial portions between the island portions. This reduces the total amount of magnetic material required, simplifying manufacturing and reducing cost, while the strategically placed island portions continue to provide sufficient magnetic force for effective attachment
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 provides repositionable and reusable attachment with adjustable magnetic force, minimizing torque and maximizing parallel shear forces, allowing items to be securely held against ferromagnetic surfaces without damaging them.
Implementation Method 1
devices having one or more magnets which generate magnetic attraction forces with ferromagnetic objects
Implementation Method 2
a magnetic sheet design that concentrates flux within an effective zone to attract ferromagnetic items
Data Source
AI summary
A device for attachment to a surface of a ferromagnetic object and for holding an item near the surface, including: a base with a frame and grip portion, the grip portion coupled to the frame at the rear side and having an outer surface for gripping the surface; a magnet-retaining portion pivotally connected to an end of the frame; a magnetic device connected to the magnet-retaining portion and having an outer surface displaced frontwardly from the outer surface of the grip portion; a cover pivotally connected to another end of the frame, the cover including a lifter configured to contact an end of the magnet-retaining portion and cause an end of the magnet-retaining portion to pivot about the frame when the cover is lifted and the lifter is rotated, thereby moving the first end of the magnet-retaining portion and the magnetic device in a rear-to-front direction; and an item-holding portion.