Telescopic Folding Wagon Structure for Compact Storage
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Solution Overview
Problem
Existing collapsible wagons have a small unfolded capacity and a large folded volume, making them inconvenient for storage in space-limited areas.
Innovation Solution
A wagon design with four telescopic standing posts and side folding mechanisms that allow the posts to retract and shorten when folded, and extend when unfolded, reducing the overall height and increasing capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the wagon uses a traditional folding mechanism, then the wagon can be folded for storage, but the height of the wagon in the folded state remains significantly greater than its height in the unfolded state, occupying large storage space
Solution Approach 1:
The standing posts are divided into telescopic segments that can extend and retract. When folded, the segments retract to reduce height; when unfolded, they extend to provide full height for capacity. This segmentation allows the wagon to achieve both compact storage and adequate capacity.
Solution Approach 2:
The standing posts are designed as dynamic telescopic structures that automatically adjust their height based on the folded/unfolded state. The side folding mechanisms drive the telescopic standing posts to retract when folded and extend when unfolded, creating a dynamic adaptation to storage and usage requirements.
2Quantity of substance
If the wagon is designed with larger capacity when unfolded, then more items can be stored, but the folded volume increases, making it difficult to store in space-limited areas
Solution Approach 1:
The telescopic standing posts are segmented to allow the wagon body to expand to full size when needed for storing items, while collapsing to a compact height when stored. This segmentation enables the wagon to achieve large capacity during use without permanently occupying large storage space.
Solution Approach 2:
The telescopic standing posts are nested within each other, allowing the structure to be compact when folded and expanded when unfolded. This nesting mechanism enables the wagon to achieve adequate capacity for storing items while minimizing the folded volume for storage in limited spaces.
3Device complexity
If the standing posts are made fixed height, then the structure is simple, but the wagon cannot adapt between compact storage and adequate capacity
Solution Approach 1:
The standing posts are transformed from fixed height to dynamic telescopic structures that automatically adjust based on the folding state. The side folding mechanisms drive the telescopic standing posts to retract when folded and extend when unfolded, providing automatic height adaptation without requiring complex manual adjustment mechanisms.
Solution Approach 2:
The standing posts are segmented into telescopic sections that can extend and retract, providing height adaptability while maintaining relatively simple overall structure. The segmentation allows the posts to change height without requiring completely different structural designs for folded and unfolded states.
Data Source
AI summary
A wagon with a height reduced after being folded includes four telescopic standing posts arranged in a rectangle pattern and at intervals, and at least two side folding mechanisms arranged opposite to each other. Two ends of the side folding mechanism are respectively hinged to two adjacent telescopic standing posts. When the wagon is folded, the side folding mechanisms drive the telescopic standing posts connected thereto to retract and shorten. When the wagon is unfolded, the side folding mechanisms drive the telescopic standing posts connected thereto to extend. The wagon has a height in a folded state smaller than a height thereof in an unfolded state. When the wagon is folded or unfolded, the folding mechanisms drive the telescopic standing posts to retract or extend. Therefore, after the wagon is unfolded, the space for a fabric bed provided on tops of the telescopic standing posts is increased.