Convertible Cargo Case with Pivotable Bottom for Wagon Storage
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Solution Overview
Problem
Existing cargo cases for folding wagons lack versatility and functionality, particularly in transitioning between cargo use, storage, and folded configurations, and do not effectively secure the wagon during these transitions.
Innovation Solution
A convertible cargo case with a frame and housing design that allows for three configurations: open cargo, closed cargo, and wagon storage, featuring receivers for engaging wagon hangers, a lock for secure attachment, and a pivotable bottom member for easy handling and storage, enabling seamless transitions and secure wagon storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a cargo case is designed for wagons, then it provides cargo storage functionality, but it lacks versatility to function as an enclosure for the wagon when folded
Solution Approach 1:
The cargo case is designed to perform multiple functions: it serves as a cargo storage container when the wagon is in use, and transforms into an protective enclosure for the folded wagon. The housing, frame, and bottom wall structure remain the same while their functional relationship to the wagon changes, allowing one object to fulfill multiple purposes throughout the wagon's operational cycles.
Solution Approach 2:
The cargo case incorporates dynamic elements including a pivotable bottom wall that can rotate between horizontal and vertical positions, and a convertible frame that adjusts its configuration. These dynamic features enable the cargo case to transition smoothly between its two functional states, adapting to the wagon's configuration changes without requiring complete disassembly or complex mechanical systems.
2Reliability
If the cargo case is made secure with locks and receivers, then it reliably secures the wagon, but it reduces ease of operation during configuration transitions
Solution Approach 1:
The locking mechanism is designed so that the locked and unlocked states are equally accessible and require similar effort to engage or disengage. The receiver and lock positioning ensures that securing the wagon to the cargo case is as straightforward as releasing it, maintaining operational ease while ensuring reliable attachment when needed.
Solution Approach 2:
The locking and securing mechanisms are designed to be self-evident and self-operating. The receivers and locks are positioned and configured so that users can naturally understand how to engage them without complex instructions, and the mechanical design allows for quick, tool-free operation that maintains ease of use while providing secure attachment.
3Strength
If the bottom wall is made rigid for structural integrity, then it provides strength, but it prevents easy passage of wagon hand grip for handling
Solution Approach 1:
The bottom wall is designed with differentiated local properties: most of the bottom wall maintains rigid construction for structural integrity and strength, while specific localized areas incorporate openings or reduced rigidity. This allows the wagon hand grip to pass through these specific locations without compromising the overall structural strength of the bottom wall, as the rigid portions continue to provide necessary support.
Solution Approach 2:
The bottom wall is segmented into distinct functional zones: rigid structural sections that provide strength and stiffness, and localized opening sections that allow hand grip passage. This segmentation enables the bottom wall to simultaneously fulfill conflicting requirements by distributing different functional qualities to different portions of the same structural element.
Data Source
AI summary
A convertible cargo case for a wagon is provided. The cargo case has a housing and a frame. The frame has frame members in a first plane and frame members in a second plane substantially parallel to the first plane. Cross members connect the frame members in the first plane with the frame members in the second plane. The housing has a first side wall, a second side wall, a third side wall, a fourth side wall, and a bottom wall defining a cavity. The housing is releasably secured to the frame with a plurality of locks. The cargo case is positioned adjacent a rear of the wagon in a cargo use configuration, and the wagon is positioned partially within the cavity of the housing in a storage configuration.