Backpack Fastening Straps Suppress Object Swinging
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Solution Overview
Problem
Backpacks used in trail running often experience swinging of housed objects, which can be felt by the wearer due to the propagation of movement, despite increased body adhesion designs.
Innovation Solution
The design incorporates intersecting fastening straps and auxiliary straps that bias the housed object and the backpack towards the wearer's back, reducing swinging by tensioning the straps to maintain the object's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the backpack is designed to tightly fasten to the body to increase adhesion, then the degree of adhesion to the body is improved, but the swinging of housed objects is likely to propagate to the entire backpack, causing discomfort to the wearer
Solution Approach 1:
The backpack is divided into multiple functional components: a main body for housing objects, separate fastening straps for securing the main body to the body, and auxiliary straps for securing housed objects within the main body. This segmentation allows each component to perform its specific function independently, preventing swinging propagation while maintaining adhesion.
Solution Approach 2:
The fastening straps and auxiliary straps act as intermediary elements between the main body and the body, and between housed objects and the main body, respectively. These intermediaries distribute the mechanical loads and prevent direct transmission of swinging forces from housed objects to the wearer's body.
2Ease of operation
If the backpack is designed as a vest-type with high adhesion to reduce burden, then ease of running is improved, but housed objects can swing freely inside without effective restraint
Solution Approach 1:
The auxiliary straps are designed to be adjustable and dynamically adaptable to the shape and size of housed objects. The straps can be tightened or loosened as needed, and their flexibility allows them to accommodate various objects while maintaining stable positioning during running movements.
Solution Approach 2:
The auxiliary straps are specifically positioned within the main body to provide localized restraint to housed objects. This local quality approach allows the vest-type backpack to maintain overall ease of running while providing targeted stability where needed, without compromising the overall comfort and mobility.
Data Source
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AI summary
A backpack 100 is provided with a main body 10 including a housing 12, and a shoulder belt 30 extending from an upper portion of the main body 10, a fastening strap 32 that passes through an inside of the housing 12 is attached to the main body 10 in such a manner that a housed object 60 is able to be biased toward a back of a wearer in the housing 12, the fastening strap 32 is arranged in such a manner that one end of which is directly or indirectly secured to a predetermined position in a lower portion of the housing 12, attached along the shoulder belt 30 from the predetermined position through the inside of the housing 12, and the other end of which is located on a front side than a top of a shoulder of the wearer, and has a fastening length adjustable at a position on the front side of the wearer.