Backpack Frame Stabilizing Rib Torsion Flex Node
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Solution Overview
Problem
Existing flexible backpack frames do not adequately accommodate shoulder and scapula movement, leading to restricted reaching and instability of the load during movement, and fail to maximize load-bearing area and minimize lateral sway.
Innovation Solution
A backpack frame design featuring a stabilizing rib positioned at the torsion flex node, with a tapered and concave configuration that distributes torsional stresses and allows for increased shoulder and forearm movement, combined with control straps for additional stability and load distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the backpack frame is made flexible to accommodate shoulder and scapula movement, then the wearer's mobility is improved, but the load stability deteriorates
Solution Approach 1:
The frame is divided into multiple functional sections: a rigid load-bearing section that maintains load stability, and flexible side rails that accommodate shoulder movement. The stabilizing rib further segments the structure to control flexion at specific locations, allowing the frame to provide both mobility and stability simultaneously.
Solution Approach 2:
Different parts of the frame have different rigidity characteristics. The load-bearing section maintains rigidity for stability, while the side rails near the shoulders are designed to be more flexible to accommodate scapula movement. The stabilizing rib is positioned to provide localized support that prevents excessive flexion.
2Ease of operation
If the frame width is reduced to accommodate arm movement, then the wearer's reaching capability is improved, but the load bearing area is reduced
Solution Approach 1:
The frame utilizes the third dimension (depth) to compensate for reduced width. By increasing the forward projection of the load-bearing section and optimizing the vertical distribution of support, the frame maintains adequate load-bearing capacity despite narrower lateral dimensions that facilitate arm movement.
Solution Approach 2:
The frame concentrates load-bearing capacity in specific high-strength areas while reducing width in regions where flexibility is needed. The load-bearing section maintains sufficient area through strategic dimensional optimization rather than uniform sizing.
3Stability of the object's composition
If the frame is made more rigid to stabilize the load, then the load stability is improved, but the wearer's mobility is reduced
Solution Approach 1:
The frame is segmented into rigid and flexible zones. The load-bearing section is constructed with higher rigidity to stabilize the load, while the side rails are designed with controlled flexibility to accommodate shoulder and scapula movement during activity.
Solution Approach 2:
The frame utilizes material and geometric parameter variations to achieve different rigidity levels in different sections. By adjusting wall thickness, cross-sectional geometry, and material properties locally, the frame achieves optimal balance between load stability and wearer mobility.
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 design enhances shoulder and forearm mobility, stabilizes loads, and minimizes lateral movement, ensuring better load distribution and stability during walking or running, while maintaining structural integrity under impact.
Implementation Method 1
A backpack frame design featuring a stabilizing rib positioned at the torsion flex node, with a tapered and concave configuration that distributes torsional stresses
Data Source
AI summary
A backpack frame has a front side and a back side and comprises generally parallel base and top sections that extend transversely across and are spaces one from the other along a center line of the frame. Side rails connect the base section to the top section. The side rails are arranged on opposite sides of the frame center line, and a stabilizing rib interconnects the side rails and extends transversely across the center line at an intermediate location between the base and top sections. The side rails converge inwardly from the base section towards the frame center line to the stabilizing rib, and diverge outwardly from the stabilizing rib and away from the center line to the top section.