Flexible Line Door Holder with Adjustable Loop and Catch
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Solution Overview
Problem
Existing door holding systems fail to consistently maintain a desired open position of vertically-hung doors, especially when faced with external forces like wind or the weight of the door itself.
Innovation Solution
A portable door holding device comprising a flexible line, a retention body, and a catch member, which forms a loop that can be adjusted to fit around a door handle, and a catch member that secures to a separate structure, maintaining tension to keep the door open.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wedge-type door stop or similar object is used to hold the door open, then the door can be maintained in an opened position, but the door stop is easily lost, difficult to install, and prone to dislodgement or sliding along the floor
Solution Approach 1:
The door holding device uses a flexible line that can be dynamically adjusted in length and configuration. The line can be wrapped around the door handle multiple times or extended to reach different anchor points, allowing the same device to adapt to various door types, handle positions, and desired opening angles, making it universally applicable and easy to install.
Solution Approach 2:
The device separates the door holding function into two independent components: a flexible line for attachment to the door and a catch member for anchoring to the frame or wall. This segmentation allows each component to be optimized independently and simplifies installation, as the components can be attached separately rather than requiring a single complex assembly.
2Reliability
If a wedge-type door stop is used, then the door can be held open, but it may not consistently maintain the particular opened position desired by the user
Solution Approach 1:
The flexible line allows continuous adjustment of the door holding position by changing the line length, wrapping configuration, or anchor point location. This parameter adjustability enables precise control over the door's opened position without requiring multiple fixed-position devices or complex adjustment mechanisms.
Solution Approach 2:
The flexible line acts as an intermediary element between the door and the anchor point. It transfers the holding force while allowing geometric flexibility, enabling the system to maintain consistent door positions across various configurations without requiring complex mechanical linkages or adjustment devices.
3Device complexity
If no door holding device is used, then the device complexity is minimal, but the door cannot maintain an opened position against external forces like wind or door weight
Solution Approach 1:
The door holding device uses simple, inexpensive components: a flexible line and a catch member. These components are easy to manufacture, replace, and install. The flexible line can be made from common materials like cord or rope, and the catch member can be a simple hook or clip, making the entire system cost-effective and suitable for temporary or permanent installation without significant investment.
Solution Approach 2:
The device allows the user to easily install and remove the door holding mechanism without requiring tools or professional installation. The flexible line can be manually wrapped and secured, and the catch member can be easily attached to the frame or wall, enabling users to service and adjust the system themselves as needed.
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
Effectively maintains the door in a selected open position by applying tension through the flexible line, preventing the door from closing due to external forces, and allowing for easy installation and removal.
Implementation Method 1
maintaining tension to keep the door open
Data Source
AI summary
A door holding device for holding a door in an opened position. The door holding device includes a flexible line, a retention body, and a catch member. The flexible line defines opposing, first and second ends and is connected to the retention body so as to form an adjustable loop. The catch member is secured to the flexible line at the second end. The loop is initially sized for placement about the door's handle (or other surface), and then cinched. With the door in a desired opened position, the catch member is available for temporary connection to a support structure apart from the door. Once connected, the holding device maintains or holds the door in the opened position, with tension in the flexible line preventing the door from moving to or toward the closed position.