Outward-Hinged Door Security Latch with Disengagement Rod
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Solution Overview
Problem
Existing door security solutions for outwardly hinged doors in schools and industrial settings are complex to implement, pose tripping hazards, and are not easily deactivatable, failing to provide a simple and non-intimidating means to secure classrooms during emergencies without modifying the door frame or floor.
Innovation Solution
A security latch apparatus with a rotatable latch arm, central pivot hinge, and disengagement rod system that can be easily mounted to the door interior, allowing for secure closure without altering the door frame or floor, and can be deactivated using a disengagement rod for emergency situations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If floor-mounted doorstops or frame-engaging rods are used, then security is improved, but tripping hazards and cleaning complications are created
Solution Approach 1:
The invention extracts the security function from floor-mounted or frame-mounted devices and relocates it to the door itself. The latch mechanism is mounted on the interior surface of the door, removing harmful floor obstructions while maintaining security through the door-integrated latch arm that engages with the door frame.
Solution Approach 2:
The door itself serves as an intermediary carrier for the security mechanism. Instead of placing security devices on the floor or frame, the patent mounts the latch mechanism on the door, using the door as a mediator to provide security without creating tripping hazards or cleaning obstacles.
2Reliability
If complex barricade systems are installed, then security is improved, but ease of operation deteriorates
Solution Approach 1:
The security function is segmented into simple, discrete components: a latch arm, pivot hinge, and disengagement rod. This segmentation allows the complex security function to be achieved through simple, individual parts that are easy to operate, with the latch arm rotating along a predefined arc to engage or disengage the security mechanism.
Solution Approach 2:
The latch arm is designed to rotate dynamically along a predefined arc rather than requiring complex mechanical operations. The pivot hinge enables smooth rotational movement, and the disengagement rod provides a simple linear insertion motion to deactivate the latch, making the system easy to operate under stress.
3Reliability
If permanent security installations are made, then security is improved, but adaptability deteriorates
Solution Approach 1:
The disengagement rod is pre-positioned and ready for insertion through the door. The latch mechanism is designed with a predefined disengagement path, allowing authorities to quickly deactivate the security measure by simply inserting the rod through the door, without requiring tools or complex procedures.
Solution Approach 2:
The security system transitions from a static, permanent appearance to a dynamically controllable state. The latch arm can rotate between engaged and disengaged positions, and the disengagement rod provides a simple mechanical intervention to change the security state, enabling rapid adaptation when needed.
4Reliability
If multiple electronic locks and frame-engaging rods are installed, then security is improved, but device complexity increases
Solution Approach 1:
The invention merges multiple security functions into a single integrated latch mechanism mounted on the door. The latch arm, pivot hinge, and disengagement rod work together as one unified system, eliminating the need for separate electronic locks, frame-mounted rods, and other gadgets, thereby reducing overall device complexity while maintaining security.
Data Source
AI summary
A security latch apparatus for the interior of a school or industrial door hinged to open outwardly. The latch includes a lower mounting door bracket with a pivotable handle designed to fit firmly against the interior doorframe and prevent that door from being prematurely pulled open. A disengagement rod is provided for authorized personnel to manually undo a secured door from its exterior.