Door Stop with Friction-Based Adjustable Mounting
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Solution Overview
Problem
Conventional door stops can cause damage to walls when doors are opened with force and often require removal to allow door movement, failing to maintain doors in fixed positions effectively.
Innovation Solution
A door stop apparatus with an adjustable elongate member and mounting plate that attaches to the door, featuring a cushioning section for frictional engagement with the floor, allowing for adjustable positioning to prevent unwanted door movement while allowing user-driven movement without wall or door contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional door stop is mounted to baseboard or wall to prevent door contact with wall, then door protection is improved, but wall damage occurs when door is opened with substantial force
Solution Approach 1:
The door stop apparatus uses a friction-based intermediary mechanism where the elongate member creates frictional engagement with the door edge to prevent unwanted movement, rather than directly blocking the door's path. This intermediary friction force protects both the door and wall from damage while allowing controlled movement.
Solution Approach 2:
The apparatus changes the interaction parameter from rigid contact (conventional door stops) to friction-based engagement. The elongate member's frictional engagement with the door edge provides a controllable force that prevents damage while allowing movement, resolving the contradiction between protection and damage prevention.
2Stability of the object's composition
If a conventional door stop completely immobilizes the door, then door position control is improved, but ease of operation deteriorates as user must remove or move the door stop
Solution Approach 1:
The door stop apparatus transitions from a static, fixed-position door stop to a dynamic system where the elongate member can slide along the door edge. The friction-based engagement provides stable positioning when needed but allows easy movement when force is applied, eliminating the need for removal or repositioning.
Solution Approach 2:
The apparatus uses the door's own weight and friction to maintain position stability without requiring active control or removal. The elongate member's frictional engagement with the door edge creates self-regulating resistance that prevents unwanted movement but yields to intentional user force.
3Ease of manufacture
If a conventional door stop is fixed in position, then manufacturing simplicity is improved, but adaptability deteriorates as it cannot maintain door in various fixed positions
Solution Approach 1:
The apparatus incorporates a dynamic elongate member that can slide to different positions along the door edge, allowing the same simple apparatus to adapt to various door positions and configurations without complex manufacturing or multiple components.
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 prevents door damage and unwanted movement, maintaining doors in fixed positions without requiring frequent removal or adjustment, ensuring safe and convenient use.
Implementation Method 1
The head section provides a level of frictional engagement with the floor that prevents unwanted movement of the door when the door is unattended by a user
Data Source
AI summary
A door stop comprises an elongate threaded member having a flat head section, such as a flat head bolt or elevator bolt, and a mounting panel carried on the threaded member. A cushioning member made of felt or other soft non-abrasive material can be positioned on the head section. A locking nut can be threaded on the threaded member, with the mounting panel between the locking nut and the head section. An alternative door stop comprises a spring-loaded member, and an elongate rod telescopically positioned within the spring-loaded member and adapted for sliding movement therein. A mounting panel can be formed on the spring-loaded member. A head section can be positioned on one end of the rod, and a cushioning member, made of felt or other soft, non-abrasive material can be attached to the outer surface of the head section.