Backpack Shoulder Straps with Fold-Over Panels
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Solution Overview
Problem
Conventional backpack shoulder straps cause discomfort due to chafing and pressure points, as they are typically flat and sewn into the top seam of the backpack, leading to poor distribution of weight across the user's neck, shoulders, and back.
Innovation Solution
The design incorporates fold-over panels integrated with the shoulder straps, constructed with perforated foam, and load-stabilizing straps that attach to both the body and the shoulder straps, allowing for a seamless transition against the user's body and improved load distribution, reducing pressure points and enhancing comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional flat shoulder straps are sewn into the top seam of the backpack, then the backpack structure is simple and easy to manufacture, but the straps cause chafing and pressure points on the user's neck and shoulders
Solution Approach 1:
The shoulder straps are formed with a curved configuration that follows the natural contour of the user's shoulder, replacing the conventional flat straight strap design. This curvature allows the strap to distribute pressure along a broader area of the shoulder, eliminating pressure points and chafing while maintaining ease of manufacture through die-cutting processes
Solution Approach 2:
The shoulder strap is divided into multiple functional zones including a curved upper portion for neck clearance, a padded load-bearing section, and attachment points for stabilizing straps. This segmentation allows each zone to perform its specific function optimally while reducing overall discomfort
2Device complexity
If conventional flat shoulder straps are used, then the device complexity is low, but the weight distribution across the user's body is poor
Solution Approach 1:
The shoulder strap design incorporates a third dimension by adding vertical curvature and thickness variation to the traditionally two-dimensional flat strap. The curved profile and integrated padding create a three-dimensional form that conforms to the shoulder's topology, improving weight distribution without significantly increasing device complexity
Solution Approach 2:
The shoulder straps feature asymmetric curvature designed to match the natural asymmetry of human shoulders, with each strap tailored to follow the specific contour patterns of shoulder anatomy, thereby optimizing load distribution across uneven body surfaces
3Force
If conventional padded shoulder straps are used, then some strain is reduced, but chafing and muscle strain still occur due to seams and uncomfortable constructions on the inner sides
Solution Approach 1:
The problematic seams and uncomfortable constructions are completely removed from the inner side of the shoulder straps. The design uses seamless die-cut foam padding and bonded construction methods to eliminate stitching that would cause chafing, while maintaining the strain-reduction benefits of padding
Solution Approach 2:
The shoulder straps incorporate porous foam padding material that provides cushioning and strain reduction while allowing breathability. This porous structure reduces moisture buildup and friction-related chafing, complementing the seamless construction to eliminate discomfort
Data Source
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AI summary
A backpack (200) with improved shoulder straps (204) includes a set of fold-over panels (206) formed respectively on the shoulder straps (204), wherein each of the fold-over panels (206) extends from an inner side of the shoulder strap (204) on which it is formed, folds over the shoulder strap (204), and attaches to an outer side (208) of the shoulder strap (204) on which it is formed. The improved shoulder straps (204) mitigate chafing around the neck of a user.