Knitted Rucksack Harness Seamless Construction
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Solution Overview
Problem
The manual assembly of rucksacks is costly and prone to inconsistencies due to the need for multiple seams, which can be weak points for durability and waterproofing, and increase weight and labor costs.
Innovation Solution
A knitted harness for rucksacks is developed, where the shoulder and hip straps are formed as one piece with the back portion, eliminating seams and allowing for internal cavities for padding, and manufactured using a knitting machine to reduce assembly labor and improve breathability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If separate components are stitched together manually, then the rucksack can be assembled with multiple functional parts, but the assembly cost increases and manufacturing precision decreases
Solution Approach 1:
The harness is manufactured as a single integrated knitted piece rather than assembling separate components (back panel, shoulder straps, hip portions) through stitching. This merging eliminates alignment issues and reduces manual labor costs while maintaining all functional elements in one seamless structure.
Solution Approach 2:
The invention transitions from woven fabric construction to knitted construction. This parameter change in manufacturing method enables seamless integration of components and eliminates the need for stitching, directly addressing both cost and precision concerns.
2Device complexity
If multiple seams are used to attach components, then the rucksack can be constructed from separate functional parts, but the reliability decreases due to potential failure points
Solution Approach 1:
By knitting the entire harness as one continuous piece, the invention eliminates all seams between components. The back panel, shoulder straps, and hip portions are integrated without any stitching joints, removing potential failure points while preserving functional complexity.
3Strength
If binding material is stitched to mesh material with a substrate, then the mesh material is protected from fraying, but the weight increases and breathability decreases
Solution Approach 1:
The invention changes the fundamental construction method from woven fabric requiring binding edges to knitted fabric where the knitting structure itself prevents fraying. This parameter change eliminates the need for additional binding materials and substrates, reducing weight while maintaining durability.
Solution Approach 2:
The invention removes the unnecessary substrate and binding material layers that were required in traditional construction. The knitted structure inherently provides edge protection, allowing extraction of redundant components that added weight and reduced breathability.
4Object-affected harmful factors
If tape or adhesive is applied to seams for waterproofing, then water ingress is reduced, but the manufacturing complexity and labor cost increase
Solution Approach 1:
By creating a seamless harness through knitting, the invention eliminates the need for separate waterproofing treatments on seams. The continuous knitted structure naturally prevents water ingress without requiring additional taping or adhesive applications.
Data Source
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AI summary
A harness for a rucksack, the harness configured to be at least in part in contact with user's back in use, the harness comprising a back portion, and at least one strap extending from the back portion, wherein the harness is of knitted construction.