Multi-Point Door Barricade with Synchronous Pivot Links
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Solution Overview
Problem
Conventional unidirectional door locks are weak as they attach only to edges or corners, making them easily breakable and inaccessible to shorter individuals, those in wheelchairs, and children, necessitating a more robust and easily usable locking mechanism that secures the door from intruders without heavy lifting.
Innovation Solution
A multi-point barricade system comprising an upper and lower barricade with pivot links and actuating handles that can be locked or unlocked simultaneously, providing comprehensive door security without requiring heavy lifting, with alternate embodiments using rotary actuators for easy operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional locks are used that attach only to edges or corners of the door, then the locking mechanism is simple and easy to install, but the security strength is weak and easily breakable
Solution Approach 1:
The barricade system is divided into multiple segments including upper barricade, lower barricade, and intermediate barricade portions that can be distributed across different locations on the door, allowing the security function to be segmented and distributed rather than concentrated at a single weak point
Solution Approach 2:
The barricade system transitions from conventional single-point locking at edges/corners to multi-point locking that extends across the entire door surface, adding spatial dimensionality to the security mechanism and distributing force across multiple attachment points
2Strength
If barricade locks are installed at or near the top portion of the door, then the security coverage is maximized, but accessibility is poor for shorter individuals, people in wheelchairs, and children
Solution Approach 1:
The barricade system is segmented into upper, lower, and intermediate portions that can be positioned at different heights on the door, allowing at least one actuating mechanism to be located within easy reach of users of all sizes and abilities while maintaining comprehensive security coverage
Solution Approach 2:
The system is designed to serve multiple user groups with different physical capabilities by providing actuating mechanisms at accessible heights, making the security system universally usable by children, adults, and people with mobility impairments
3Strength
If conventional barricades employ wood or metal bars, then the structural strength is high, but the weight is heavy and difficult to lift for many individuals
Solution Approach 1:
The system replaces traditional heavy mechanical barricade bars with a lighter mechanism that uses rotational movement and latching to achieve the same security function, reducing the weight that users need to lift while maintaining structural strength through the latching mechanism
Solution Approach 2:
The barricade system changes the physical parameters of the locking mechanism by using rotational actuators and latching systems instead of heavy sliding bars, altering the weight and movement characteristics while preserving the security function
4Strength
If multiple barricade portions are distributed across the entire door and door frame, then the security protection is enhanced, but the device complexity and installation difficulty increase
Solution Approach 1:
Multiple barricade portions are merged into a coordinated system where upper, lower, and intermediate barricades work together through linked actuating mechanisms, allowing simultaneous operation of multiple security points through a unified control system
Data Source
AI summary
A compact door barricade apparatus for use on doors is described. The apparatus is equipped with a protective inner case, outer case, door mount, an upper barricade, a lower barricade, barricade pivot links, handles, and barricade latches. Screws or lag bolts are used to mount the barricade latches to the door frame. The door mount connects the apparatus to the door. The barricade pivot links effectively link the movement of the upper barricade to that of the lower barricade. The movement of the handle disposed on the apparatus facilitates the synchronous movement of the upper and lower barricades across the width of the door and door frame, effectively securing individuals within a room.