Backpack Suspension Resilient Unit Absorbs Bounding Force
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Solution Overview
Problem
Conventional backpacks cause back fatigue and strain due to uneven distribution of loading force and continuous bounding movement when worn, especially during walking or running, as they lack effective suspension systems to absorb and distribute forces evenly across the shoulder straps.
Innovation Solution
A backpack with a suspension arrangement featuring a resilient unit between the pack body and shoulder straps, which absorbs bounding forces and distributes loading forces evenly, minimizing up-and-down and lateral movements, and allowing adjustable tension to accommodate varying loads without altering the original backpack design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a suspension frame is added to minimize up and down movement of the bag body, then the bounding force is reduced, but the overall weight of the backpack increases due to the added frame weight
Solution Approach 1:
The patent changes the physical parameters of the shoulder straps by incorporating elastic materials with specific elasticity coefficients (k1, k2) to create a resilient unit that can dynamically absorb bounding forces. This allows the straps to function as a suspension system without requiring a heavy rigid frame, thus reducing the overall weight while still minimizing harmful bounding movements.
Solution Approach 2:
The patent uses composite construction by combining elastic materials with traditional strap materials to create a resilient unit. This composite approach provides both the weight-bearing capability and the elastic suspension function, achieving force reduction without the need for a separate heavy frame structure.
2Quantity of substance
If multiple items are disposed in the bag body, then the carrying capacity is improved, but the loading force is unevenly distributed to the shoulder straps causing the wearer to lean
Solution Approach 1:
The patent introduces a resilient unit as an intermediary between the bag body and shoulder straps. This resilient unit acts as a mediator that can independently adjust to uneven forces, allowing multiple items to be carried while maintaining balanced force distribution to both shoulder straps through the elastic properties of the resilient unit.
3Device complexity
If the bag body only has a top opening, then the structure is simple, but the wearer cannot easily access items at the bottom of the bag cavity
Solution Approach 1:
The patent divides the bag body into multiple access points by adding a bottom opening in addition to the top opening. This segmentation allows the wearer to access items at different locations (top and bottom) without having to remove all items, improving ease of operation while maintaining relatively simple structural elements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces the continuous bounding force on the wearer's body, preventing back fatigue and strain by evenly distributing the load across the shoulder straps, allowing for comfortable carrying of heavy loads and easy access to the backpack's contents.
Implementation Method 1
a resilient unit provided between the pack body and the shoulder straps for absorbing a bounding force of the pack body
Data Source
AI summary
A backpack includes a pack body, two shoulder straps extended from the pack body for allowing the wearer to wear the pack body at the wearer's back, and a suspension arrangement which includes a resilient unit provided between the pack body and the shoulder straps for absorbing a bounding force of the pack body. Therefore, the resilient unit allows a relative movement of the pack body with respect to each of the shoulder straps but minimizes the relative movement of the pack body by absorbing the bounding force of the pack body. The resilient unit is also arranged for evenly distributing a loading force of the pack body to each of the shoulder straps, such that the resilient unit absorbs the bounding force of the pack body at different directions so as to balance the uneven loading force at the pack body.