Foldable Wagon Scissor Frame Maintains Vertical Height
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Solution Overview
Problem
Conventional foldable wagons do not maintain the same vertical height in collapsed and expanded configurations, resulting in increased storage space requirements.
Innovation Solution
A collapsible wagon design featuring scissor bar assemblies and a telescopic tow handle that allow the frame to maintain the same vertical height in both configurations, with a pliable liner and stiffening panel for easy conversion and minimal effort, and a collapsible bottom support assembly to distribute cargo load evenly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional foldable wagons are collapsed, then the wagon can be stored, but the vertical height increases making storage space larger
Solution Approach 1:
The patent applies dynamic mechanisms including scissor bar assemblies that can transition between extended and collapsed states, and a telescopic tow handle that adjusts length, enabling the wagon to maintain consistent vertical height (approximately 25 inches) in both collapsed and expanded configurations while reducing storage volume
Solution Approach 2:
The patent implements nesting by placing the collapsed scissor bar assemblies and telescopic handle components within the wagon frame structure, allowing the wagon to compact into a space-efficient configuration that maintains a consistent footprint and vertical height for storage
2Volume of moving object
If the wagon is made collapsible, then storage space is reduced, but the structural complexity increases
Solution Approach 1:
The patent segments the frame into modular components including scissor bar assemblies, telescopic handle sections, and collapsible side panels, each designed to fold or telescope independently, reducing overall complexity through standardized modular units that simplify manufacturing and assembly
Solution Approach 2:
The scissor bar assemblies serve multiple functions: providing structural support in expanded configuration, enabling compact folding in collapsed configuration, and maintaining consistent vertical height throughout the transformation, thereby reducing the need for separate structural components
3Volume of moving object
If the wagon is collapsed to minimal volume, then storage efficiency improves, but cargo load distribution may be affected
Solution Approach 1:
The collapsible bottom support assembly dynamically adjusts its configuration based on load requirements, providing enhanced support structures when expanded for cargo carrying and compacting efficiently when collapsed for storage, maintaining stability throughout the transformation cycle
Data Source
AI summary
A foldable wagon has a frame that is collapsible in a manner such that the wagon basically has the same vertical height when in the collapsed and expanded configurations. The frame has folding bar assemblies on its sides. As the wagon is altered from the expanded to the collapsed configurations, the lower leg outer end of each of the pair of folding bar assemblies slides downward relative to the corresponding upper leg outer on the respective vertically oriented pole. The pairs of folding bar assemblies increase in height and decrease in length. As wagon is altered from the collapsed to the expanded configuration, the lower leg outer end of each of the pair of folding bar assembly slides upward relative to the corresponding upper leg outer end s on the respective vertically oriented pole, and the pairs of folding bar assemblies decrease in height and increase in length.