Antitheft parcel delivery door system
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Solution Overview
Problem
There is a need for an antitheft parcel delivery system that can securely receive and deposit parcels in a facility while preventing theft and ensuring safety from human and animal harm, as existing solutions are inadequate in securing parcels at unattended locations.
Innovation Solution
An antitheft parcel delivery door system featuring a weather-resistant exterior cover, a rotating parcel drum, and a cam assembly that allows parcels to be safely received and deposited within a facility interior space, with a protective interior cover to prevent unauthorized access and harm, utilizing a composite door material and a motorized mechanism for efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional unattended porch or front door is used for parcel delivery, then delivery convenience is improved, but parcel security deteriorates leading to theft
Solution Approach 1:
The patent introduces an intermediary parcel deposit mechanism (rotating drum with receptacle) between the delivery person and the facility interior. This mediator allows secure parcel transfer without requiring the delivery person to enter the facility or the recipient to leave, thus maintaining convenience while improving security through controlled access via the cam-actuated rotating drum
2Ease of operation
If the facility door remains open for parcel access, then parcel retrieval ease is improved, but facility security deteriorates allowing unauthorized access
Solution Approach 1:
The rotating drum assembly acts as an intermediary mechanism that enables parcel retrieval without compromising facility security. The cam assembly actuates the drum to rotate and present the receptacle at the door opening only when needed, while the protective cover can remain closed otherwise, preventing unauthorized access while maintaining easy parcel retrieval through the controlled rotating mechanism
Solution Approach 2:
The patent employs a dynamic rotating drum mechanism that changes position based on operational needs. The drum rotates between a retracted position (when protective cover is closed) and an extended position (when cam assembly actuates it), allowing the system to adapt between security mode and parcel access mode, thus maintaining facility security while enabling easy parcel retrieval
3Reliability
If a rotating parcel drum mechanism is implemented, then parcel security is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex motorized or electronically controlled rotating mechanisms with a simpler cam-based mechanical actuation system. The cam assembly, when actuated by the protective cover opening/closing motion, mechanically rotates the drum through follower arms and linkages, eliminating the need for motors, sensors, or electronic controls while maintaining secure parcel delivery functionality
Solution Approach 2:
The patent combines multiple functions into a single integrated mechanism. The protective cover's opening and closing motion is merged with the drum rotation actuation through the cam assembly, so that one action (cover movement) simultaneously performs both protection and parcel presentation functions, reducing overall system complexity while maintaining security
4Reliability
If the protective cover is made fully enclosed for security, then theft prevention is improved, but operational accessibility deteriorates
Solution Approach 1:
The protective cover is designed as a dynamic structure that transitions between closed (secure) and open (accessible) states. When opened, the cam assembly is actuated to rotate the drum and present the receptacle at the door opening, allowing parcel deposit or retrieval. This dynamic behavior maintains theft prevention during closed states while ensuring operational accessibility during authorized use
Data Source
AI summary
An antitheft parcel delivery door system for a facility including a door with a door opening; a weather resistant exterior cover attached to a first door face, moveably positioned over the opening; parcel drum support bracket, moveable arm and rotating parcel drum with parcel drum opening, and cam assembly revolving the rotating parcel drum in the door opening, the cam assembly rotating the parcel drum simultaneously while the weather resistant exterior cover is opened and closed, enabling the rotating parcel drum to receive a parcel then counter revolve in a second direction of rotation to deposit the parcel in a facility interior space; and a protective interior cover with opening attached to a second door face enabling a parcel to drop safely into the facility interior space while preventing unwanted facility access, theft of the parcel, human harm and animal harm from contact with the rotating parcel drum and the cam assembly.