Magnetic Door Stop Eliminates Floor Gap

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Solution Overview

Problem

Conventional door stops either lack automation or require an air gap below the door, which is not always practical or aesthetically pleasing.

Innovation Solution

A magnetic door stop system comprising a top member with a vertically movable bolt and a bottom member, where the bolt is lifted by a spring and attracted to the bottom member when the door is positioned correctly, eliminating the need for a gap between the door and the floor.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If conventional door stops are used, then door stabilization is achieved, but an air gap below the door is required which is not aesthetically pleasing and not always practical

Engineering Contradiction:
Improveaesthetics and practicalityVSAvoidstructural requirement
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The patent replaces conventional mechanical door stop mechanisms with a magnetic field-based system. Magnets embedded in the door and corresponding magnetic sensors in the threshold detect door position and activate the motorized bolt only when needed, eliminating the requirement for physical air gaps while maintaining door stabilization functionality.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The door stop system operates automatically through magnetic detection and motorized actuation. When the door approaches the threshold, the magnetic sensor detects its position, triggers the motor to extend the bolt, and stops the door without requiring manual intervention or pre-configured air gaps, making the system self-regulating and adaptable.

Inventive Principle:
Principle #25Self-service

2Extent of automation

If conventional door stops are used, then door stabilization is achieved, but automation is lacking

Engineering Contradiction:
Improveautomatic door stoppingVSAvoidmechanism complexity
Core Design Contradiction:
Extent of automationVSDevice complexity

Solution Approach 1:

The patent replaces manual or purely mechanical door stop mechanisms with an automated electromagnetic system. Magnetic sensors detect door position, microcontrollers process the information, and motorized bolts execute the stopping action automatically, achieving high automation while managing complexity through modular electronic components.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system incorporates magnetic sensors that continuously monitor door position and provide feedback to the control system. This feedback enables the automated mechanism to detect when the door is approaching the threshold and activate the bolt at the appropriate moment, achieving precise automatic door stopping without requiring complex mechanical linkages.

Inventive Principle:
Principle #23Feedback

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 magnetic attraction ensures the door stop functions automatically without a gap, providing a seamless and aesthetically pleasing solution for door stabilization.

Implementation Method 1

the bolt and the bottom member are characterized in bolting by magnetic attraction therebetween

Methodology Applied
Scientific EffectMagnetic attraction: Magnetism

Data Source

PatentUS10344520B2Door stop
Publication Date: 2019.07.09 SHMUEL BURSHTAIN
  • US10344520B2 patent drawing
  • US10344520B2 patent drawing
  • US10344520B2 patent drawing

AI summary

A door stop, including: a top member, being fixed to the bottom of a door, the top member including a vertically movable bolt, and a spring, for lifting the bolt in relation to the door; and a bottom member, being fixed to the floor, for being disposed below the door at the stopping disposition thereof, wherein the bolt and the bottom member are characterized in bolting by magnetic attraction therebetween, being stronger than the lifting of the bolt by the spring, thereby the bolt does not protrude below the bottom of the door at the non-bolted state, thereby not requiring a gap between the door bottom and the floor.