Hinge Locking Device for Forced Entry Resistance
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Solution Overview
Problem
Conventional door locks can fail or break under sufficient force, allowing unauthorized access and posing a risk in lockdown situations, while door hinges can also be compromised if enough force is applied.
Innovation Solution
A hinge locking device comprising a mounting plate with a plate slot and a reinforcement gusset, which engages with the door hinge assembly to provide additional security by bracing against both the door panel and the door frame, and includes a wall engagement member to secure the device to the surrounding wall.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional lock is used on the door, then the door can be secured against casual access, but the lock can fail or break under sufficient force allowing unauthorized access
Solution Approach 1:
The locking system is divided into multiple independent components: a lock mechanism on the door and a separate hinge locking device on the frame. This segmentation ensures that failure of one component does not compromise the entire security system, as the hinge lock provides independent reinforcement against forced entry
Solution Approach 2:
The invention combines the conventional lock mechanism with an additional hinge locking device that engages both the door and door frame. This merging creates a multi-point security system where forces are distributed across multiple engagement points, preventing the concentration of force that would otherwise break a single lock
2Object-affected harmful factors
If force is applied to break the lock, then unauthorized access may be achieved, but the door hinges can also be broken if sufficient force is applied
Solution Approach 1:
The hinge locking device is engaged before any forced entry attempt occurs. By pre-positioning the lock bars in their engaged state and securing them with set screws, the system is prepared in advance to resist applied forces, distributing the stress across the mounting plate, reinforcement gusset, and engagement points with both door and frame
3Strength
If a hinge locking device is added to reinforce security, then resistance to forced entry is improved, but the device complexity increases
Solution Approach 1:
The mounting plate serves multiple functions: it provides structural support for the entire hinge locking device, acts as a reinforcement element through its integrated gusset, and creates multiple engagement points with both the door and door frame. This multi-functionality reduces the need for separate components, simplifying the overall device while maintaining high strength
Solution Approach 2:
The reinforcement gusset is nested within or integrated with the mounting plate structure, creating a compact, space-efficient design. The lock bars are positioned within the structural framework of the mounting plate, allowing the components to support each other without requiring additional external bracing elements
Data Source
AI summary
A door locking device includes a mounting plate configured to be mounted to the door; a reinforcement gusset extending outward from the mounting plate, the reinforcement gusset defining an extension portion; and a wall engagement member adjustably affixed to the extension portion of the reinforcement gusset and laterally offset from the mounting plate; wherein the wall engagement member is movable relative to the extension portion in a direction substantially perpendicular to the mounting plate, and wherein the extension portion is configured to confront a wall adjacent to the door.