Expandable Cargo Footrest and Wheel Spacing for Personal Mobility
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Solution Overview
Problem
Conventional electric kickboard personal mobility devices become unstable and difficult to load cargo due to narrow footrests and fixed wheel configurations, making it challenging to maintain balance when carrying loads.
Innovation Solution
A personal mobility device with adjustable front wheel spacing and a cargo loading unit that expands laterally to accommodate larger loads, featuring rotatable expansion members, sliding expansion units, and stoppers to secure cargo, allowing for stable loading and driving with adjustable wheel intervals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the footrest width is increased to load cargo, then the cargo loading capacity is improved, but the device complexity increases
Solution Approach 1:
The footrest is divided into a main body portion and two expandable side portions that can be independently folded outward. This segmentation allows the footrest to expand in width when cargo needs to be loaded, while maintaining a compact form when empty, thus increasing cargo capacity without permanently increasing device complexity
Solution Approach 2:
The footrest incorporates movable side portions that can be dynamically adjusted between folded and unfolded states. This dynamic configuration allows the user to adapt the footrest width according to cargo requirements, transforming a static structure into a flexible one that resolves the contradiction between loading capacity and device complexity
2Stability of the object's composition
If the front wheel interval is fixed, then the device complexity is reduced, but the stability when cargo is loaded deteriorates
Solution Approach 1:
The front wheel assembly incorporates an adjustable mechanism that allows the interval between the two front wheels to be changed. The wheels can be positioned closer together when empty and spread wider when cargo is loaded, providing dynamic stability adjustment without permanently complicating the device structure
Solution Approach 2:
The distance between the rotation centers of the two front wheels is made variable rather than fixed. By changing this geometric parameter according to loading conditions, the device achieves improved stability when cargo is present while maintaining simpler characteristics during empty operation
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
Enables stable driving and loading of larger cargo by expanding the loading region and adjusting wheel spacing, improving balance and usability when carrying cargo.
Implementation Method 1
Each of the expansion members may include a magnet provided to be attached to the main body when folded toward the main body
Data Source
AI summary
An embodiment personal mobility includes a main body including a footrest on an upper surface of the main body, a steering device provided in front of the main body, a front wheel installed at a lower end of the steering device, a rear wheel installed at a rear end of the main body, and a cargo loading unit configured to be unfolded in a lateral direction from opposite sides of the main body to expand a loading region for loading a cargo in an unfolded state and configured to be folded toward the main body in a folded state.