Door Security Device with Floor Plate and Connecting Member
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Solution Overview
Problem
Conventional door locks are prone to failure when subjected to blunt force, such as kicking, as they often rely on the door frame for support and lack durability, ease of installation, and quick engagement.
Innovation Solution
A door security device comprising a door plate, a floor plate, and a connecting member with mating features that slidably engage slots on the door plate and floor plate, providing enhanced support and restricting movement or rotation of the door, while allowing easy installation and quick locking/unlocking mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional door locks use the door frame as support, then the lock structure is simple, but the lock fails when blunt force is applied
Solution Approach 1:
The door security device is divided into separate components: a door plate that attaches to the door, a floor plate that attaches to the floor, and a connecting member that links them. This segmentation allows each component to be optimized for its specific function and enables easy replacement if damaged, resolving the contradiction between reliability and complexity.
Solution Approach 2:
The invention transitions from traditional horizontal door frame support to vertical floor-based support. The floor plate anchors the system to the floor, creating a three-dimensional support structure that resists blunt force more effectively than conventional two-dimensional door frame mounting, thereby improving reliability without excessive complexity.
2Reliability
If a durable lock is designed to resist blunt force, then the lock becomes more complex, but installation becomes more difficult
Solution Approach 1:
The door plate and floor plate are pre-designed with mounting holes and attachment features that simplify installation. The connecting member is pre-fabricated with specific geometries that align with corresponding features on the plates, allowing for straightforward assembly without complex field modifications, thus maintaining ease of installation while achieving durability.
Solution Approach 2:
The connecting member features nested geometric relationships where cylindrical portions fit into corresponding holes, and mating features interlock between components. This nesting design ensures proper alignment and secure connection during installation, making the durable lock easy to assemble without requiring complex alignment procedures.
3Force
If a lock provides strong resistance to applied forces, then the engagement mechanism becomes more complex, but quick engagement becomes slower
Solution Approach 1:
The connecting member's geometry is designed so that when inserted, it automatically engages with the door plate and floor plate through self-aligning features. The cylindrical portion fits into holes and the mating features interlock without requiring manual adjustment or complex activation mechanisms, providing strong force resistance while enabling quick, tool-free engagement and disengagement.
Data Source
AI summary
A device for restricting movement of a door includes a door member, a floor member, and a connecting member. The door member is fixedly mounted to a door and includes a first opening having a first predetermined shape. The floor member is fixedly mounted to a floor and includes a second opening having a second predetermined shape. The connecting member includes a first leg and a second leg. The first leg extends in a first direction and has a first end removeably engaging the first opening. The second leg extends in a second direction that is perpendicular to the first direction and has a second end removeably engaging the second opening simultaneously when the first end removeably engages the first opening thereby preventing rotation of the door.