Magnetic Door Stop Hinge Attachment and Friction Design

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Solution Overview

Problem

Current door stops are limited in use, difficult to employ, non-magnetic, hard to hold in place, complex, damaging, expensive, ineffective, inefficient, bulky, require bending, prone to slipping, and lack versatility and compact storage.

Innovation Solution

A door stop with a block featuring a padded end, an array of magnets for secure attachment to a door hinge, and a recessed semi-circular design to fit around the hinge, eliminating the need for hooks or clips, and utilizing a high-friction engagement layer for enhanced stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a heavy solid object like lead brick is used as door stop, then the door stop can effectively hold the door open, but it is toxic and damaging

Engineering Contradiction:

Improvedoor holding capabilityVSAvoidtoxicity and damage

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent changes the material parameters from toxic heavy materials (lead) to non-toxic materials (rubber, plastic, wood) while maintaining the door-holding function through magnetic attachment and friction-based mechanisms

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces purely mechanical heavy-object door stops with a magnetic attachment system combined with friction-based holding mechanisms, eliminating the need for heavy toxic materials

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Ease of operation

If a wedge-shaped door stop is used, then it can be easily positioned by kicking, but it is prone to slipping and hard to hold in place

Engineering Contradiction:

Improvepositioning easeVSAvoidstability and anti-slip

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent uses composite construction with a magnetic core material surrounded by a high-friction material layer, combining the holding power of magnets with the slip-resistant properties of high-friction surfaces

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The high-friction material acts as an intermediary between the magnetic core and the door surface, providing enhanced grip and preventing slippage while the magnetic field provides the primary holding force

Inventive Principle:

Principle #24Intermediary (Mediator)

3Ease of operation

If a magnetic door stop is used, then it can be easily attached to the door, but it must be strong enough to hold the door weight yet weak enough to be easily detached

Engineering Contradiction:

Improveattachment and detachment easeVSAvoidholding strength

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent carefully selects and adjusts the magnetic field strength parameters to achieve the optimal balance between holding capability and ease of detachment, using adjustable magnetic components

Inventive Principle:

Principle #35Parameter changes

4Reliability

If traditional door stops are used, then they can stop the door, but they require bending and are limited in use

Engineering Contradiction:

Improvedoor stopping functionVSAvoiduser convenience and versatility

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent designs a universal door stop system that can be attached to various door types and configurations using magnetic attachment, eliminating the need for installation-specific adaptations and bending maneuvers

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

Instead of requiring the user to bend down and position a traditional door stop on the floor, the patent inverts the approach by attaching the door stop directly to the door itself at a convenient height

Inventive Principle:

Principle #13The other way round (Inversion)

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 provides a safe, efficient, and versatile door stop that securely holds doors open without damaging the door or requiring bending, offering improved stability and ease of use by leveraging magnetic attachment and friction-enhancing materials.

Implementation Method 1

an array of magnets for secure attachment to a door hinge

Methodology Applied

Scientific EffectMagnetic attachment: Magnetism

Implementation Method 2

a high-friction engagement layer for enhanced stability

Methodology Applied

Scientific EffectFriction: Friction

Data Source

PatentUS8955891B2Door stop

Publication Date: 2015.02.17 MILLSAP MICHAEL R

AI summary

There is a door stop including a block having a top surface and a bottom surface. The block includes an engaging perimeter and a non-engaging perimeter opposite the engaging perimeter and is disposed between the top surface and the bottom surface. The block includes a protrusion extending therefrom at a boundary region between the engaging perimeter and the non-engaging perimeter. The door stop includes a plurality of magnets disposed in an array along an exterior of the engaging perimeter. The door stop includes a recessed portion disposed about the engaging perimeter and is configured to rest about a hinge of a door.