Door Barricade Egress Mechanism With Single-Motion Cable Release
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Solution Overview
Problem
Existing door barricades are difficult for disabled individuals to access and use, require multiple steps for egress, and lack a single motion mechanism for both barricading and opening the door, posing safety risks during emergencies.
Innovation Solution
A door barricade system mounted between the interior face of the door and the adjacent floor, allowing a one-motion egress by simultaneously unlocking the door and opening it, with a separate mechanism for disabled individuals to engage or disengage without bending over, featuring a vertical bolt and dual cable system for easy operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a door barricade is mounted between the interior face of the door and the floor, then the barricade strength and stability are improved, but the ease of operation deteriorates because users must bend over to engage or disengage the barricade
Solution Approach 1:
A cable mechanism acts as an intermediary between the user's hand and the barricade's locking mechanism. The cable transmits the user's pulling force to disengage the vertical bolt from the floor, allowing the barricade to be opened without bending over. This mediator enables operation from a standing position while maintaining the barricade's structural strength.
2Reliability
If a traditional door barricade requires separate steps for unlocking and opening the door, then the barricade security is improved, but the egress speed deteriorates because multiple motions are required
Solution Approach 1:
The barricade opening mechanism and door opening mechanism are merged into a single integrated system. When the user pulls the cable, it simultaneously disengages the vertical bolt from the floor (opening the barricade) and activates the door handle (opening the door). This combination allows egress in a single motion while maintaining security when the barricade is engaged.
3Ease of operation
If the barricade is positioned low on the door for easy access, then the ease of operation is improved, but the barricade effectiveness deteriorates because it can be easily kicked in
Solution Approach 1:
Instead of positioning the barricade interaction point low on the door (two-dimensional placement), the system uses a cable that extends upward to a high position on the door (utilizing the vertical dimension). This allows the user to operate the barricade from a standing position at a high location, maintaining both ease of operation and barricade effectiveness by preventing the door from being kicked in at low points.
Data Source
AI summary
An improved door barricade system for use during an emergency situation, having a pivoting locking arm which drops into a floor hole to lock a barricade in place using a single motion egress system to unlock and open a door simultaneously.