Carry Bag Strap Tensile Strand Reinforcement
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Solution Overview
Problem
Conventional carry bags often suffer from excessive stretch and weight distribution issues due to inadequate tensile reinforcement in their strap portions, leading to discomfort and inefficiency in carrying heavy loads.
Innovation Solution
Incorporating tensile strand reinforcing elements, comprising a base layer and cover layer with strategically placed one-dimensional strands that resist longitudinal stretch, minimizing superfluous material and optimizing stretch resistance in specific directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If tensile strand reinforcing elements are added to the strap portion, then stretch resistance and load-bearing strength are improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The strap portion is constructed as a composite material system combining a base layer (woven or knit fabric) with embedded tensile strand reinforcing elements. These strands are made from materials with different mechanical properties than the base layer, creating a composite structure where the strands provide targeted tensile strength and stretch resistance while the base layer provides flexibility and comfort. This resolves the contradiction by achieving enhanced strength without requiring the entire strap structure to be complex.
Solution Approach 2:
The reinforcing function is segmented from the base strap material and implemented through discrete tensile strand elements embedded within the strap portion. Rather than making the entire strap structure complex, only specific strand elements are added to provide the necessary reinforcement. These strands can be individually positioned and tensioned to address specific stretch resistance requirements at different locations within the strap.
2Strength
If tensile strand reinforcing elements are added to the strap portion, then load-bearing strength is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The manufacturing process merges the incorporation of tensile strand reinforcing elements with the existing strap fabrication process. The strands are embedded within the strap portion during manufacturing, combining multiple functions (structural support, aesthetic design, and reinforcement) into a single integrated component. This approach allows load-bearing strength to be enhanced without requiring separate assembly steps or complex post-processing operations, thereby minimizing manufacturing complexity and cost.
3Strength
If traditional reinforcement methods are used, then strength is improved, but material mass and cost increase due to superfluous material
Solution Approach 1:
Rather than uniformly reinforcing the entire strap portion with additional material, the invention applies tensile strand reinforcing elements selectively at specific locations where stretch resistance and load-bearing strength are most needed. The strands are embedded within the strap portion at strategic positions to provide targeted reinforcement, reducing the overall quantity of material required compared to traditional methods that would require adding material throughout the entire strap structure.
Data Source
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AI summary
A carry bag may include a container portion and a strap portion. The container portion defines an interior compartment for containing objects, and the strap portion extends from the container portion. At least one of the container portion and the strap portion include (a) a base element formed from a two-dimensional material and (b) a strand formed from a one-dimensional material. The strand lies adjacent to and substantially parallel to a surface of the base element for a distance of at least five centimeters.