Backpack Moisture-Expelling Pump and Permeable Bag
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Solution Overview
Problem
Existing backpack designs fail to efficiently expel moisture from the gap between the user's back and the backpack, relying on natural airflow which is inefficient and often compromised by deformation or the use of non-permeable materials.
Innovation Solution
A backpack with two sheets, straps, and a moisture-expelling apparatus comprising a permeable bag, a pump, and a tube with check valves and apertures, allowing for active air circulation to remove moisture through the use of a pump that can be manually or automatically expanded to facilitate air exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If rib-like portions are made soft to provide comfort, then user comfort is improved, but the space between the user's back and the backpack is reduced due to deformation
Solution Approach 1:
The back panel is divided into multiple independent ribs that can be segmented and arranged to maintain both comfort and ventilation space. Each rib acts as an independent element that can be optimized for both softness and structural integrity.
Solution Approach 2:
The ribs are designed with dynamic properties allowing them to flex and adapt to the user's back shape while maintaining a consistent minimum distance from the back surface. The material or structure enables the ribs to deform comfortably without collapsing the ventilation space.
2Device complexity
If natural airflow is used for moisture release, then device complexity is reduced, but moisture expelling efficiency is insufficient
Solution Approach 1:
A vibration element is introduced to create air flow through the ventilation channels. The vibration actively moves air through the space between the user's back and the backpack, significantly enhancing moisture expelling efficiency compared to passive natural convection alone.
3Volume of moving object
If arched elements are made of metal to maintain large space, then space maintenance is improved, but moisture release efficiency remains insufficient due to reliance on natural airflow
Solution Approach 1:
The metal arched elements serve as a rigid framework to maintain the ventilation space, while a vibration element is added to actively circulate air through this space. This combination preserves the structural integrity and space maintenance benefits of metal elements while overcoming the inefficiency of passive airflow.
Solution Approach 2:
A vibration element or active airflow mechanism acts as an intermediary between the rigid metal structure and the moisture release function. This intermediary component transforms the static space-maintaining structure into an active moisture expelling system by driving air flow through the ventilation channels.
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 maintains a dry and comfortable user experience by actively expelling moisture from the gap between the user's back and the backpack, improving upon previous designs that relied solely on natural airflow.
Implementation Method 1
The pump can be squeezed to release air and can automatically expand to suck air when the squeezing stops
Implementation Method 2
The moisture-expelling apparatus includes a permeable bag, a pump and a tube. The permeable bag is attached to the second sheet. The pump is inserted in the permeable bag
Implementation Method 3
The tube includes apertures via which air can enter and leave the tube
Data Source
AI summary
A backpack includes two sheets, two straps and a moisture-expelling apparatus. The sheets are connected to each other. The straps are connected to one of the second sheet. The moisture-expelling apparatus includes a permeable bag, a pump and a tube. The permeable bag is attached to the second sheet. The pump is inserted in the permeable bag.The pump can be squeezed to release air and can automatically expand to suck air when the squeezing stops. The tube is inserted in the permeable bag. The tube is connected to the pump so that air travels into the tube from the pump when the pump is squeezed and that air travels into the pump from the tube when the pump expands. The tube includes apertures via which air can enter and leave the tube.