3D Printed Lattice Lumbar Pad for Backpack Ventilation
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Solution Overview
Problem
Existing backpack designs and lumbar pads fail to effectively address the issues of perspiration accumulation, ventilation, flexibility, and comfortable force distribution, particularly during exercise such as hiking.
Innovation Solution
The use of 3D printing technology to manufacture backpack components, including lumbar pads, with lattice structures that provide airflow, cushioning, and variable resistance, while being anatomically shaped to fit the user's body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If traditional backpack lumbar pads are used, then structural support is provided, but perspiration accumulates and ventilation is poor
Solution Approach 1:
The lumbar pad incorporates a lattice structure with inherent porosity that allows air circulation and perspiration evaporation. The lattice geometry creates channels and voids throughout the pad material, enabling passive ventilation without active mechanical systems.
Solution Approach 2:
The lumbar pad combines multiple materials including the lattice structure (providing ventilation), foam layers (providing cushioning), and fabric coverings (providing comfort and moisture management). This composite approach integrates ventilation, cushioning, and comfort functions in a single component.
2Strength
If rigid lumbar pads are used, then structural support is improved, but flexibility and comfort are reduced
Solution Approach 1:
The lumbar pad transitions from a static rigid structure to a dynamic flexible structure that adapts to the user's back contours and movement. The lattice framework provides structural support while the foam and fabric layers enable flexion and conformability to the user's anatomy during activity.
Solution Approach 2:
The lumbar pad utilizes flexible foam layers and fabric coverings that wrap around and conform to the user's lumbar region. These flexible elements maintain structural support through the lattice framework while allowing the pad to adapt to body contours and movement.
3Ease of manufacture
If uniform density lumbar pads are used, then manufacturing is simplified, but force distribution comfort is reduced
Solution Approach 1:
The lumbar pad features variable density foam regions and strategically placed lattice structures that provide different levels of support in different areas. High-density regions provide support for heavier load areas while lower-density regions provide comfort for less stressed areas, optimizing force distribution across the lumbar region.
4Productivity
If standard backpack designs are used, then production efficiency is high, but adaptability to individual users is limited
Solution Approach 1:
The lumbar pad is pre-formed with a lattice structure and anatomical contours that anticipate and adapt to individual user back shapes. The design incorporates adjustable elements and flexible materials that can be customized to fit different users without requiring complex post-manufacturing adjustments.
Data Source
AI summary
Backpacks having lumbar pads as at least one component that has been manufactured using 3D printing or other additive manufacturing technologies. backpack may include 3D manufactured parts including a lumbar pad, shoulder harness, hip belt, or back panel. The component or lumbar pad may include a lattice structure that allows airflow or provides cushioning. The lattice structure may: have multiple layers, include a network of beams and nodes (e.g., that create cells), or be monolithic. The cells may be polygons (e.g., hexagonal) or cells may line up in multiple layers of lattice structure. Cells that line up may have equal numbers of sides. Other embodiments include systems for providing custom backpacks where consumers enter consumer body dimension(s) and the system fabricates a custom backpack or component using the body dimension or desired load capacity, for example, using 3D printing.