Seamless Backpack Liner Peripheral Attachment
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Solution Overview
Problem
Conventional backpacks with stitched liners cause skin irritation due to seam edges rubbing against the user's skin during use, especially during high-activity movements.
Innovation Solution
A one-piece, seamless bodyside liner that covers the body-facing surfaces of the backpack panels and shoulder straps, attached only along the peripheral edge, reducing the likelihood of skin irritation and providing comfort, durability, moisture resistance, and odor resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional stitched liners are used to cover backpack panels and shoulder straps, then the liner can be easily manufactured and attached, but the stitching edges cause skin irritation and chaffing during use
Solution Approach 1:
The liner is divided into multiple functional segments: a seamless bodyside liner portion that contacts the user's skin, and separate panel portions that attach to the backpack structure. This segmentation allows the skin-contact portion to remain stitch-free while maintaining manufacturability through separate assembly of non-contact portions.
Solution Approach 2:
The harmful stitching elements are extracted and removed from the bodyside liner portion that contacts the user's skin. The attachment means are positioned only at the periphery, away from the skin-contact surface, thereby eliminating the source of skin irritation while preserving the liner's attachment functionality.
2Object-affected harmful factors
If a seamless one-piece liner is used to eliminate skin irritation, then user comfort is improved, but the attachment complexity and manufacturing difficulty increase
Solution Approach 1:
The liner system is segmented into a seamless bodyside liner portion and separate panel portions with attachment means. This allows the skin-contact portion to be manufactured as a simple seamless piece while the attachment functionality is distributed to separate components that can be easily attached to backpack panels.
Solution Approach 2:
Attachment means such as elastic bands, hooks, or Velcro® are introduced as intermediary elements between the liner and backpack panels. These intermediaries simplify the attachment process by providing standardized connection points at the periphery, avoiding the need for complex seamless integration while maintaining secure attachment.
3Object-affected harmful factors
If peripheral attachment only is used for the liner, then skin irritation is reduced by eliminating internal seams, but the liner may become loose or detach during use
Solution Approach 1:
The liner is segmented with attachment means positioned at the periphery rather than distributed throughout the entire liner. This peripheral segmentation provides secure attachment points that prevent loosening while keeping the skin-contact portions seam-free and comfortable.
Solution Approach 2:
The liner utilizes flexible elastic bands or thin film attachment means at the periphery that can conform to the backpack structure while maintaining secure attachment. These flexible elements accommodate movement and tension without creating rigid seams that would cause skin irritation.
Data Source
AI summary
A backpack which includes at least one panel defining an interior compartment adapted to store objects for transport in the backpack, wherein the at least one panel has a bodyfacing surface. The backpack further includes a pair of shoulder straps attached to the at least one panel for use in carrying the backpack on a user's back, each of the shoulder straps having another bodyfacing surface. A bodyside liner covers the bodyfacing surfaces of the at least one panel and the pair of shoulder straps. The bodyside liner is free from attachment to the at least one panel and the shoulder straps except along a peripheral edge of the bodyside liner, wherein the peripheral edge of the bodyside liner is attached to the at least one panel and the pair of the shoulder straps.