Wedge Doorstop With Compressible Layer For Damage-Free Holding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing doorstops are either too bulky for easy carrying, limited to specific orientations, or damage doors and frames due to lack of compressible materials, and often require attachment to the door or frame, restricting their versatility and usability across different door types.
Innovation Solution
A wedge doorstop with a rigid core surrounded by a compressible material, allowing three points of contact between the door and frame for secure holding without damage, and capable of being used in multiple orientations, including under the door, with a low profile design and integrated carrying features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional wedge-shaped doorstop is used, then the door can be held open, but the doorstop is bulky and difficult to carry
Solution Approach 1:
The doorstop is divided into two distinct components: a rigid core wedge that provides structural support and a compressible outer layer that provides friction and protection. This segmentation allows each component to be optimized independently, resulting in a compact overall size while maintaining functionality.
Solution Approach 2:
The doorstop uses a composite structure combining a rigid core material (such as plastic or metal) with a compressible outer layer (such as rubber or foam). This composite design enables the doorstop to be smaller and lighter than conventional solid doorstops while still providing sufficient friction and door protection.
2Strength
If hard materials are used for the doorstop, then structural strength is improved, but the door and frame are damaged
Solution Approach 1:
Different regions of the doorstop have different material properties: the core is made of rigid material for structural strength, while the outer layer contacting the door and frame is made of compressible material for protection. This local differentiation of material quality resolves the contradiction between strength and damage prevention.
Solution Approach 2:
The doorstop combines rigid core material with compressible outer material in a layered composite structure. The rigid core maintains structural integrity while the compressible outer layer cushions contact with the door and frame, preventing damage.
3Ease of manufacture
If the doorstop is made without compressible material, then manufacturing is simpler, but friction between door and frame is insufficient
Solution Approach 1:
The doorstop uses a composite structure where a relatively simple rigid core is combined with a compressible outer layer. While the composite structure adds some manufacturing complexity, it can be produced through efficient processes like injection molding or adhesive bonding, while the compressible layer significantly enhances friction and holding capability.
4Stability of the object's composition
If the doorstop connects to the door or frame, then holding stability is improved, but the doorstop cannot be easily removed and carried away
Solution Approach 1:
The invention extracts the connection mechanism from the doorstop design, making the doorstop completely removable from the door and frame. Instead of using fasteners or attachments, the doorstop relies on friction and wedge geometry to maintain stability during use, then can be easily removed and carried away when not needed.
5Reliability
If the doorstop has a large profile, then friction surface area is increased, but carrying convenience is reduced
Solution Approach 1:
The compressible outer layer provides a large effective friction surface area despite the doorstop's compact overall size. When compressed between the door and frame, the outer layer deforms to maximize contact area, providing sufficient friction without requiring a large-profile rigid structure.
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 wedge doorstop effectively holds doors open with increased friction and protection for doors and frames, is easily portable, and adaptable to various door types, including those without exposed hinges, ensuring secure and damage-free operation.
Implementation Method 1
The outer perimeter of the wedge contacting the door and frame are covered with a compressive material which increases friction in the wedged position
Implementation Method 2
a rigid core structure that is covered by an outer layer formed by a compressible material along the multiple contact sidewalls of the wedge
Data Source
AI summary
The invention described herein is a wedge doorstop having a pair of adjacent sidewalls that respectively abut an edge of a door and a doorframe in a preferred orientation. Additionally, another sidewall of the stop abuts the frame stop of the doorframe and a compressible material along each one of the sidewalls protects the frame and increases friction. In operation, the door is opened and the doorstop is inserted into the gap between the frame and the door, and when the door begins to swing towards the frame, the wedge is sandwiched between the edge of the door and the frame. Additionally the compressive material prevents the doorstop from damaging the door or frame. Alternatively, the wedge can be inserted between the ground and bottom edge of the door.