Wheeled Luggage Steering Control via Biasing Wheel Restraint
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Solution Overview
Problem
Wheeled luggage often experiences steering difficulties, especially in crowded or uneven areas, due to freely rotatable wheels that make it hard to control and navigate, particularly at higher speeds.
Innovation Solution
A support structure with a plurality of spaced wheels that are rotatable about pivot axes and equipped with a biasing element to releasably restrain at least one wheel to a desired angular position, allowing for controlled movement and improved steering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wheels are freely rotatable through 360 degrees, then the luggage can move in any direction with minimal force, but steering control deteriorates and the luggage drifts on uneven or sloped surfaces
Solution Approach 1:
The wheel assembly incorporates a dynamic braking mechanism that can selectively lock the wheel at specific angles. The biasing element (spring) provides continuous rotational force while the brake mechanism can engage to hold the wheel at desired orientations, creating a dynamic system that transitions between free rotation and controlled positioning based on operational needs.
Solution Approach 2:
The system changes the rotational parameter of the wheel from completely free (360 degrees) to constrained at specific angles through the braking mechanism. This parameter change allows the wheel to maintain freedom of movement when needed while providing stable angular positioning for steering control, effectively modifying the degree of freedom of the wheel assembly.
2Adaptability or versatility
If wheels are freely rotatable, then the luggage can be positioned and oriented with small adjustments, but steering difficulty increases during straight line movement or corner negotiation
Solution Approach 1:
The biasing element creates a dynamic system where the wheel can be easily adjusted to new angular positions through continuous rotational force, yet maintains stable positioning once reached. This dynamic characteristic allows users to make small positioning adjustments while reducing the effort required to steer during movement.
Solution Approach 2:
The biasing element automatically performs the function of returning the wheel to its neutral or desired angular position after being displaced, reducing the user's steering effort. The spring mechanism self-corrects wheel orientation, providing automatic assistance during steering operations without requiring continuous user intervention.
3Adaptability or versatility
If wheels are freely rotatable, then the luggage can be maneuvered in crowded areas, but user energy consumption increases to maintain control at higher speeds
Solution Approach 1:
The biasing element acts as a self-service mechanism that automatically maintains wheel orientation and provides rotational assistance, eliminating the need for the user to continuously exert energy to control wheel direction. The spring mechanism performs the work of returning wheels to neutral positions and assisting rotation, significantly reducing user energy consumption during 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
Enhances steering control and ease of navigation by allowing wheels to be restrained in desired directions, reducing the effort required to manage the luggage, especially in constrained spaces and at higher speeds.
Implementation Method 1
biasing element that is operable to releasably restrain the angular movement at least one wheel to at least one angular position with respect to the base
Data Source
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AI summary
This invention relates generally to wheeled luggage, and particularly to wheeled luggage with one or more controlled wheels for improved tracking and steering control of the luggage case when it is in motion. The invention provides a support structure for a luggage case comprising a plurality of spaced parallel wheels and at least one biasing element that is operable up to a certain torque to releasably restrain the angular movement at least one wheel to at least one angular position with respect to the base. Conveniently, the at least one angular position corresponds to a desired direction of travel.