Delivery door extension
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Solution Overview
Problem
The existing delivery systems face challenges in securely delivering packages inside homes or businesses without granting access to delivery personnel, while maintaining security system integrity and reducing re-delivery costs.
Innovation Solution
A delivery door extension that attaches to a door jamb and door, allowing delivery through a secure window while restricting interior access, and includes features like a telescoping frame, automatic window operation, and integration with electronic security systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If packages are left on the front porch for delivery, then delivery cost is reduced, but packages become vulnerable to theft and unauthorized access
Solution Approach 1:
The patent introduces a door extension as an intermediary structure between the door and the interior space. This extension creates a buffer zone where packages can be placed securely, preventing direct access to packages while maintaining delivery efficiency. The extension acts as a mediator that resolves the conflict between convenient delivery and package security.
2Reliability
If the door is opened to allow delivery personnel inside, then secure delivery is enabled, but home security is compromised
Solution Approach 1:
The door extension divides the interior space from the exterior by creating a separate buffer zone. This segmentation allows the door to remain closed while still enabling package transfer, thus maintaining security while achieving delivery reliability. The extension creates a distinct intermediate space that separates the secure interior from the public exterior.
3Reliability
If a door extension is installed to enable secure delivery, then package security is improved, but device complexity increases
Solution Approach 1:
The door extension incorporates movable components including a telescoping frame that can extend and retract, and a window that opens and closes. These dynamic elements allow the structure to adapt between different states (extended for delivery, retracted for normal use) without requiring permanent structural modifications, thus managing complexity while maintaining security benefits.
4Loss of information
If the telescoping frame is extended to match door height, then visual confirmation is improved, but device complexity increases
Solution Approach 1:
The telescoping frame uses extendable sections that can be adjusted to match the door height when needed for visual confirmation, then retracted to minimize profile. This dynamic adjustment capability provides visual confirmation capability on demand without requiring a permanently complex structure, resolving the contradiction between information visibility and structural simplicity.
Data Source
AI summary
A delivery door extension that attaches to an existing door jamb and engages with an existing door is provided. The delivery door extension includes a panel having a planar body with opposing front and rear surfaces extending between first and second side surfaces, a top surface, and a bottom surface, wherein the panel body includes an opening. The delivery door extension also includes a delivery window body configured to move between an open position and a closed position, a hinge mechanism attached to the first side surface of the panel, a blocking mechanism on the second side surface that restricts movement of the existing door, and a frame that includes first and second portions.