Luggage Surface Features for Corner Strength
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Solution Overview
Problem
Hard-sided luggage cases are prone to damage from impact loads, particularly at the corner regions due to their high curvature and reduced surface area, which existing solutions like adding additional layers cannot effectively mitigate as they increase weight, making them less acceptable with the trend towards lighter materials.
Innovation Solution
The luggage case features surface features such as ribs and grooves formed in a pattern, with higher density near corner regions and lower density elsewhere, designed to absorb and disperse impact forces, reducing the likelihood of permanent deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If additional layers or thicker material cross section are added to corner regions to increase structural strength, then corner impact resistance is improved, but weight increases
Solution Approach 1:
The patent applies local quality by creating surface features (ribs and grooves) specifically concentrated in corner regions where impact resistance is needed, rather than uniformly thickening the entire shell. This localized structural modification provides enhanced corner strength without proportionally increasing overall weight, as the additional material is only where mechanically necessary.
Solution Approach 2:
The patent transitions from modifying material thickness (one dimension) to creating surface features with varying depth and spacing (adding dimensional complexity). The ribs and grooves create a three-dimensional surface structure that disperses impact forces through multiple levels, providing strength enhancement without simply increasing material cross-section and weight.
2Object-affected harmful factors
If surface features are formed in higher density near corner regions, then impact force dispersion is improved, but manufacturing complexity increases
Solution Approach 1:
The patent segments the shell surface into regions with different surface feature densities - higher density near corners for impact protection and lower density in central areas. This segmentation allows the structure to provide enhanced protection where needed while maintaining simpler geometry elsewhere, balancing impact resistance with manufacturing feasibility.
Solution Approach 2:
The surface features are configured with local quality variations where rib spacing and groove depth are adjusted based on location. Corner regions have tighter spacing and deeper features for maximum impact resistance, while central regions have sparser, shallower features. This localized optimization provides effective impact force dispersion without requiring uniformly complex geometry throughout the entire shell.
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 surface features effectively absorb and disperse impact energy, enhancing corner strength and resilience, reducing the risk of damage while maintaining a lightweight construction.
Implementation Method 1
The present disclosure in particular provides an improved shell structure for a luggage article that can absorb and disperse the energy of an impact such that the shell absorbs the impact force
Data Source
AI summary
A luggage article having surface features providing enhanced corner strength is provided. The luggage article includes a housing at least partially formed by an outer layer and defining in part a first side, a second side, and a third side. A corner region is defined at the intersection of the first, second, and third sides, and an apex region is defined at least partially by the corner region. The luggage article may also include a first elongated surface feature formed by the outer layer and extending at least partially across one or more of the first, second, and third sides at a first distance spaced away from the apex region and curving relative to the apex region. The luggage article may also include a second elongated surface feature. The first and second surface features may define a curve similar to each other along a portion of their respective length.