Adjustable Door Wedge with Locking Mechanism for Bidirectional Draft Resistance
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Solution Overview
Problem
Current door wedges are limited as they only secure doors in one direction and are prone to premature wear, making them impractical for long-term use, especially when exposed to drafts that can cause doors to close.
Innovation Solution
A door wedge with a locking mechanism that includes a base member and an L-shaped member, where the upper and lower layers are configured to compress and decompress to secure the door in both forward and backward positions, preventing movement and featuring adjustable components for various door sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single piece door wedge is used, then the door can be secured in one direction, but the wedge is subject to premature wear and cannot prevent door movement in both directions
Solution Approach 1:
The door wedge is divided into multiple components: a base member with upper and lower layers, an L-shaped member with vertical and horizontal portions, and a door contact member. This segmentation allows each component to perform specific functions - the layered base provides stability and wear distribution, the L-shaped member provides structural support and drafting resistance, and the door contact member directly interfaces with the door to prevent movement in both directions.
Solution Approach 2:
The base member comprises an upper layer and a lower layer made of different materials or configurations, creating a composite structure that combines the advantages of each layer - such as combining hardness for wear resistance with softness for door surface protection, or combining rigid support with flexible cushioning.
2Device complexity
If a single piece door wedge is used, then the structure is simple, but it only prevents door movement in one direction and is affected by drafts
Solution Approach 1:
The multi-component structure segments the door securing function into directional components: the base member and L-shaped member work together to resist drafts and prevent backward movement, while the door contact member specifically prevents forward movement. This segmentation allows each component to be optimized for its specific directional function.
Solution Approach 2:
The L-shaped member with its vertical portion extending upward is positioned to preemptively counteract draft forces before they can dislodge the wedge. The door contact member is positioned to preemptively prevent the door from moving forward before actual contact or pressure is applied.
3Strength
If current door wedges are made from hard materials, then they are durable, but they cause premature wear when in contact with the door
Solution Approach 1:
Different portions of the door wedge system have different material properties optimized for their specific functions: the base member and L-shaped member use harder materials for structural strength and wear resistance against the floor, while the door contact member uses a softer or more compliant material that is durable yet gentle on the door surface, preventing both wedge degradation and door damage.
Solution Approach 2:
The door contact member or base member comprises composite materials or layered structures that combine hard and soft properties - such as a hard outer layer for durability with a soft inner layer for door protection, or combining materials with different friction characteristics to achieve both strength and door surface compatibility.
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 durable and adjustable door wedge that effectively secures doors in both directions, resisting drafts and minimizing wear, thus ensuring long-term usability and safety by preventing accidental door closure.
Implementation Method 1
the upper layer and lower layer of the base member are configured to compress with respect to each other to enable the door to slide over the upper layer and decompress to secure the door
Implementation Method 2
the lower layer comprising a first end and a second end pivotably mounted to the upper layer
Implementation Method 3
the horizontal member is slidably mounted to the first end of the lower layer
Data Source
AI summary
A door wedge for securing a door in a stationary position and having a locking mechanism to prevent forward and backward movement of the door is provided. The door wedge includes a base member with an upper layer pivotably mounted to a lower layer, and a L-shaped member slidably mounted to an end of the lower layer. The upper layer and lower layer of the base member compress with respect to each other to enable the door to slide over the upper layer and decompress to secure the door within space between the upper layer and the L-shaped member, thereby preventing forward and backward movement of the door.