Waterproof Tape Sealed Inner Lining for Backpacks
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Solution Overview
Problem
Conventional waterproof bags are not fully waterproof due to sewing holes along seam lines, which allow rainwater to enter, and relying on separate rain covers is inconvenient and ineffective.
Innovation Solution
An inner lining made of waterproof fabric with overlapping portions, seam lines, and gaps covered by waterproof tape to prevent rainwater ingress, along with an inner pocket and fixer to create compartments and secure contents, integrated into an outer bag with a cap and draining holes for added protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional waterproof bags are made of stitched waterproof fabrics, then the bag structure is formed, but sewing holes along seam lines allow rainwater to enter and compromise waterproof functionality
Solution Approach 1:
A waterproof tape is introduced as an intermediary component between the waterproof fabric and the stitching. The tape is positioned over the seam lines and stitching holes, creating a secondary barrier that prevents rainwater from penetrating through the sewing holes while maintaining the structural integrity of the bag.
Solution Approach 2:
The waterproofing system is segmented into multiple functional layers: the waterproof fabric provides the primary barrier, the stitching provides structural joining, and the waterproof tape provides a secondary sealing layer. This segmentation allows each component to perform its specific function while collectively achieving reliable waterproofing.
2Reliability
If a separate rain cover is added to conventional waterproof bags, then protection against rainwater is improved, but user convenience deteriorates due to forgetting the cover and increased device complexity
Solution Approach 1:
The waterproof tape is merged with the bag structure itself, integrating the waterproofing function directly into the bag rather than requiring a separate rain cover. The tape is positioned over the seam lines and stitching holes, becoming an inherent part of the bag's construction, thereby eliminating the need for separate protective accessories.
Solution Approach 2:
The bag becomes self-protecting through the integrated waterproof tape that automatically prevents rainwater penetration without requiring user action. The tape is permanently positioned over the vulnerable seam lines, providing continuous protection without needing separate rain covers that users must remember to attach and remove.
3Reliability
If a separate rain cover is used, then waterproof protection is enhanced, but device complexity increases and the cover is easily lost or damaged
Solution Approach 1:
The waterproof function is merged into the bag's primary structure by positioning the waterproof tape over the seam lines and stitching holes. This integration eliminates the need for separate rain covers and reduces the number of components, simplifying the overall device while maintaining reliable waterproof protection.
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 inner lining effectively prevents rainwater from entering the bag, ensuring items remain dry and providing enhanced convenience and safety in rainy conditions without the need for a separate rain cover.
Implementation Method 1
The at least one waterproof tape covers the at least one seam line and seals the multiple gaps
Implementation Method 2
The at least one waterproof fabric is folded and stitched. A receiving space is formed by the at least one waterproof fabric
Implementation Method 3
a fixer is sewed on the at least one waterproof fabric within the receiving space. The fixer is selectively fixed with the inner pocket
Data Source
AI summary
Provided is an inner lining for backpacks or handbags. The inner lining has a receiving space constructed by folding and stitching at least one waterproof fabric. Multiple seam lines on the inner lining are covered by waterproof tapes. The inner lining may prevent the rainwater permeating into the receiving space through the seam lines. Items may be protected from the wet in the receiving space of the inner lining. Further provided is a waterproof bag having the inner lining. The inner lining is sewed in an outer bag to construct the waterproof bag. Multiple seam lines between the outer bag and the inner lining are also covered by waterproof tapes. The inner lining and the waterproof bag having the inner lining provide more convenience and safety for users in rainy days.