Collapsible Children's Pull Wagon with Pivotable Frame and Steering
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Solution Overview
Problem
There is a need for a collapsible and easily storable children's pull wagon with a simple construction that can be steered and is safe for children to use for transporting toys, while also being easy to fold and store.
Innovation Solution
A pull wagon design featuring a pivotably connected upper and lower frame with a U-shaped support frame that allows the upper frame to fold onto the lower frame, creating a collapsed configuration, and includes a steering mechanism with a telescoping pull bar and rotating front axle for easy maneuverability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the wagon is designed to be collapsible for easy storage, then the stowability is improved, but the structural complexity increases
Solution Approach 1:
The wagon frame is divided into an upper frame and a lower frame that can be separated and folded relative to each other. The support frame is also segmented into multiple sections that can be collapsed together, allowing the entire wagon to be folded into a compact configuration for easy storage while maintaining structural integrity when assembled.
2Ease of operation
If the wagon includes a steering mechanism for easy maneuverability, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The front axle is designed to be steerable, allowing the wagon to change direction easily during operation. The pull bar is made telescopic, enabling it to extend and retract dynamically. These dynamic features improve maneuverability and adaptability without requiring overly complex mechanical systems.
3Ease of manufacture
If the wagon uses a simple construction with minimal parts, then the ease of manufacture is improved, but the reliability may worsen
Solution Approach 1:
The support frame is integrated with the upper frame through pivotable connections, combining multiple functions into unified structural elements. The clip mechanism merges the support and stabilization functions into a single component system. This integration reduces the total number of separate parts needed while maintaining structural reliability through cohesive design.
4Ease of operation
If the upper frame can pivot relative to the lower frame for collapsibility, then the ease of operation is improved, but the stability worsens
Solution Approach 1:
The support frame is designed to be positioned and secured in a predetermined manner to provide preliminary stabilization before the wagon is fully assembled or put into use. The pivotable connections are designed with predetermined movement paths that ensure stable configuration when the frames are connected, preventing unintended movement while allowing controlled folding.
Data Source
AI summary
A collapsible children's pull wagon having four wheels and an upper loop frame pivotably attached to a lower loop frame. There is a hub to which a pull bar and a front axle is coupled to. The front axle is capable of rotating along a vertical axis of the hub in order to change the direction of travel. The pull wagon can easily collapse by releasing a support frame which directly connects the rear end of the upper loop frame to the rear end of the lower loop frame.