Double Door Security Device with Interlocking Prong
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Solution Overview
Problem
Double doors, particularly 'French' doors, lack effective reinforcement for enhanced security against forced entry, as the second door is difficult to secure due to the absence of a door jam, and existing security devices are not aesthetically pleasing or conveniently storable.
Innovation Solution
A security device comprising a first locking member with an elongated male portion and a second locking member with a female portion, along with a locking prong and release button, that can be easily attached and detached, providing a secure and aesthetically pleasing solution by engaging with the door handles or pockets to prevent movement between the doors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional door lock is used on a double door, then the door can be locked, but the second door is difficult to secure because there is no door jam to aid in reinforcement
Solution Approach 1:
The patent introduces a door security device as an intermediary component that bridges the gap between the two doors. This device includes a first locking portion that engages with the first door and a second locking portion that engages with the second door, creating a mechanical connection that compensates for the missing door jam reinforcement.
Solution Approach 2:
The door security device is divided into separate modular components including a first locking member, a second locking member, and a locking prong. These segmented parts can be independently attached to different doors and then connected together, allowing flexible installation on double door configurations without requiring modifications to the door structure itself.
2Strength
If a security device is designed to withstand substantial force, then forced entry resistance is improved, but the device becomes harder to attach and remove
Solution Approach 1:
The locking prong is designed with flexible characteristics that allow it to dynamically adapt during installation and removal. The prong can flex to accommodate slight misalignments during attachment, then becomes rigid when locked into place between the teeth of the locking members, providing strength when needed while maintaining ease of operation.
Solution Approach 2:
The patent replaces complex mechanical fastening systems with a simplified engagement mechanism. The locking prong engages with the teeth of the locking members through a straightforward insertion and locking motion, eliminating the need for tools or complex assembly procedures while still providing substantial resistance to forced entry.
3Reliability
If the security device is made prominent for visibility, then security presence is improved, but aesthetics are compromised
Solution Approach 1:
The security device is designed with differentiated local qualities where the locking portions that engage with the doors are substantial and functional, while the overall profile maintains a sleek, minimal appearance. The device can be positioned to remain less prominent when not in use, balancing security presence with aesthetic considerations.
Data Source
AI summary
A security device for a double door, including a first locking portion having a curved portion and an elongated male portion, and a second locking portion having a curved portion and an elongated female portion. A lock mechanism includes a pair of rows of teeth having a gap therebetween and associated with the bottom side of the male portion and a locking prong mounted to the female portion. The locking prong has a flexible finger portion that terminates in a T-shaped end. The finger portion can slide between the gap in the rows of teeth. A release button mounted on the female portion, when pressed, causes the locking prong to bend downward, disengaging the T-shaped end from between the teeth and allowing the first and second locking portions to separate, thereby unlocking the security device.