Door Security Kit Clamping Strike Plate
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Solution Overview
Problem
Classroom and commercial doors often lack heavy-duty, reinforced locking mechanisms that can be easily secured from inside, making them vulnerable to forced entry during violent incidents, posing a risk to occupants.
Innovation Solution
A Door Security Kit comprising a modified ASA/ANSI strike plate with an elongated lip and a cuboid metal compartment that clamps onto the strike plate when locked, preventing the door from being opened, using a mortise cylinder and keyway mechanism to adjust the channel size for secure engagement with the strike plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a heavy-duty reinforced locking mechanism is installed on a door, then door security and resistance to forced entry is improved, but device complexity and difficulty of installation increases
Solution Approach 1:
The door security system is divided into separate components: a strike plate installed on the door frame and a portable door guard that can be independently positioned and locked. This segmentation allows each component to be simpler while the combination provides strong security.
Solution Approach 2:
The portable door guard acts as an intermediary element between the door and the strike plate. It engages with the notched strike plate to prevent door opening, providing the reinforced locking function without requiring the door itself to contain complex mechanisms.
2Ease of operation
If a portable door security device is used, then ease of operation and rapid deployment is improved, but reliability and resistance to forced entry may be reduced
Solution Approach 1:
The door guard is constructed from high-strength materials including a steel frame, acrylic panels, and reinforced locking components. This composite construction provides both portability and the reliability needed to resist forced entry attempts.
Solution Approach 2:
The door guard incorporates curved and angled surfaces, particularly in the locking mechanism and engagement surfaces with the strike plate. These geometric features distribute forces more effectively and prevent simple prying or forcing techniques.
3Reliability
If a notched strike plate is mounted on the door frame, then engagement with the door guard is improved, but manufacturing precision requirements increase
Solution Approach 1:
The door guard incorporates adjustment mechanisms that allow the locking surfaces and engagement points to be dynamically positioned to match the strike plate notches. This adaptability compensates for minor variations in strike plate manufacturing while ensuring reliable engagement.
Data Source
AI summary
Disclosed is a door security kit comprising (1) a metallic cuboid compartment, (2) a door guard assembly, and (3) an ASA/ANSI modified strike plate, the modified strike plate constructed with a top notch, a bottom notch, and an elongated lip. The metallic compartment further manifests a rear planar panel, having an adjustable channel cutout. A mortise cylinder mounted externally to one surface of the compartment connects to a tailpiece at one end with a keyway extending therethrough. Rotation of the keyway operates the tailpiece and a connected rod, the rod moving metallic plates to control the size of the adjustable channel. Decreasing the length of the adjustable channel causes the channel to clamp onto the notches of the strike plate, preventing movement of the door bolt from its insertion within the modified strike plate. The door, and the strike plate, are both housed and operate within a doorjamb.