Door Stopper Holder With Torsion Spring Mechanism
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Solution Overview
Problem
Existing door and window stopper devices often damage the door or floor, lose efficiency over time, and are not easily adjustable to accommodate different door thicknesses or user needs, and may not provide adequate safety.
Innovation Solution
A door stopper and holder device with a movable, rotatable part using a torsion-coil spring that can be adjusted in length and height, allowing for secure door retention without damaging the door or floor, and can switch between stopper and holder modes easily, accommodating various door positions and user requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If magnets are used to hold the door in the open position, then the door can be easily held open with small release effort, but the door may be inadvertently released by drafts or objects and the magnets lose efficiency over extended usage
Solution Approach 1:
The patent employs a dynamic spring-loaded arm mechanism that automatically adjusts to door thickness and weight. The spring provides continuous adaptive force to maintain reliable door holding, while the mechanical engagement through the arm and floor contact provides positive locking that prevents accidental release by drafts or objects, resolving the contradiction between reliable holding and susceptibility to inadvertent release.
Solution Approach 2:
The patent replaces the magnetic field-based holding system with a mechanical spring-loaded arm system. This mechanical substitution provides more reliable and consistent holding force that is not susceptible to the gradual efficiency loss characteristic of magnets, while also providing positive mechanical engagement that prevents accidental release.
2Reliability
If a hook-like member is used to secure the door to the holder, then the door can be selectively secured, but a piece must be attached to the door which alters its integrity or safety
Solution Approach 1:
The patent extracts the securing mechanism from the door itself and relocates it to the floor. The spring-loaded arm pivots on the floor and contacts the door edge without requiring any attachment to the door. This extraction eliminates the harmful effect of altering door integrity while maintaining reliable door securing through the floor-mounted mechanical engagement.
3Ease of operation
If door stoppers are installed directly on the door with a stopper member that rotates to contact the floor, then the door can be stopped from moving toward closed position, but the device loses efficiency over time and may damage the floor with markings or scratches
Solution Approach 1:
The patent inverts the conventional door stopper design by mounting the stopper mechanism on the floor rather than on the door. The spring-loaded arm pivots on the floor and extends to contact the door edge, reversing the traditional arrangement. This inversion prevents floor damage by using a controlled mechanical engagement with adjustable contact pressure and a larger surface area, while maintaining the door stopping function.
4Reliability
If wedges are used as door stoppers, then the door can be held in position, but they do not always properly function, easily lose efficiency, and get in the way when not being used
Solution Approach 1:
The patent employs a dynamic spring-loaded arm that can be positioned in different configurations. When not in use, the arm can be rotated or folded back against the wall mounting, clearing the door path. The spring mechanism maintains reliable door holding through consistent mechanical engagement, while the movable design eliminates the space occupation problem of static wedges.
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 maintains door safety and accessibility while preventing damage to the door and floor, is easy to install and use, and can be adapted for different door types and user needs, ensuring reliable operation and safety.
Implementation Method 1
A door stopper and holder device with a movable, rotatable part using a torsion-coil spring that can be adjusted in length and height
Data Source
AI summary
A door stopper and holder device for a door and having a distal part for anchoring to a structure adjacent the door when in a door open position, and a proximal part movably mounting onto the distal part. The proximal part is movable between an operating configuration, in either stopper mode or holder mode with the proximal part either being in abutment with the door or capturing the door therewith in the door open position, respectively, and a switching configuration in which the proximal part allows the door to be moved relative to the device which switches between the stopper and holder modes of the operating configuration. A device axis is generally perpendicular to a door plane when the door is in the door open position.