Collapsible Wagon Handlebar Assembly for Single-Handed Push-Back Folding
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Solution Overview
Problem
Collapsible wagons in the prior art require both hands for unfolding and collapsing, have a large gap between the handle and wagon body leading to poor stability, and lack a simple push-back function.
Innovation Solution
A collapsible utility wagon with a push-back function device featuring a rear wheel frame assembly, front and rear handlebar strut assemblies, a lock device assembly, and a mesh bag, allowing single-handed operation and easy folding/unfolding with minimal effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a simple push-back function is added to the collapsible wagon, then the usability is improved, but the device complexity increases
Solution Approach 1:
The patent combines the push-back function with the existing handlebar assembly by integrating struts and locking mechanisms into the handlebar structure. The front handlebar strut assembly and rear handlebar strut assemblies are merged with the handlebar to provide both pushing and collapsing functions through a unified structure, rather than adding separate independent mechanisms.
Solution Approach 2:
The handlebar assembly serves multiple functions: it provides the pushing interface for the push-back function, acts as the collapsing mechanism when locked, and supports the mesh bag. The struts and locking rod are designed to fulfill both structural support and functional operation roles, reducing the need for separate components.
2Ease of operation
If both hands are required to unfold or collapse the wagon, then the structural stability is maintained, but the ease of operation deteriorates
Solution Approach 1:
The locking mechanism is designed to automatically engage and secure the handlebar assembly in both unfolded and collapsed states without requiring manual intervention. The locking rod with locking protrusions automatically locks into the locking grooves on the struts, allowing the structure to self-stabilize and enabling single-handed operation while maintaining structural integrity.
3Stability of the object's composition
If the gap between handle and wagon body is reduced for better stability, then the stability is improved, but the device complexity increases
Solution Approach 1:
The handlebar assembly is designed to nest closely with the wagon body when collapsed, with the handlebar struts fitting into the wagon frame structure. The locking mechanism allows the handlebar to be positioned tightly against the wagon body, minimizing the gap between components while maintaining a simple connection structure through the existing strut and locking rod design.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The collapsible wagon can be operated single-handedly, occupies minimal space when collapsed, and provides good stability, making it suitable for vehicle storage and easy setup in small spaces.
Implementation Method 1
The front handlebar strut assembly has a lower end rotatably connected to the rear wheel frame assembly, and an upper end rotatably connected to a front end of the handlebar assembly. The two rear handlebar strut assemblies are left-right symmetrically arranged on two sides of the rear wheel frame assembly. Each of the rear handlebar strut assemblies has one end rotatably connected to a middle portion of the rear wheel frame assembly and the other end rotatably connected to a rear end of the handlebar assembly.
Implementation Method 2
The lock device assembly is disposed on a top portion of the rear wheel frame assembly... The lock hook is disposed at a connection point of the right rear handlebar strut assembly and the handlebar assembly. The lock column is disposed on a right lower end of the rear wheel frame assembly.
Data Source
AI summary
A collapsible utility wagon includes a push-back function device assembly, and a collapsible utility wagon body assembly, wherein the push-back function device assembly is provided behind the collapsible utility wagon body assembly. The push-back function device assembly includes a rear wheel frame assembly, a front handlebar strut assembly, two rear handlebar strut assemblies, a lock device assembly, a handlebar assembly, a lock hook, a lock column, a mesh bag and rear wheels. The push-back function device assembly is provided behind the collapsible utility wagon body assembly, so that a sheet-like collapsible wagon is enabled to implement a push-back function instead of being able to be pulled only forward as that of the prior art. The collapsible utility wagon has a good link ability, and can be unfolded or collapsed with a simple process and a minimal effort with ease of use.