Rolling tote bag
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Solution Overview
Problem
Existing rolling tote bags suffer from lack of support at the bottom corners, which leads to wear and tear, and the presence of apertures in the bottom panel for caster wheels introduces weaknesses and allows dust penetration, while current solutions are complex and costly.
Innovation Solution
A rolling tote bag with a collapsible container body and a retaining structure of fabric panels that securely holds the support plate outside the inner storage volume, using releasable securing flaps and fastening elements to attach the rolling support assembly, allowing passage of caster wheels and accommodating various sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If apertures are provided in the bottom panel for caster wheels, then the rolling support assembly can be attached, but the bottom panel structure is weakened and dust can penetrate
Solution Approach 1:
The bottom panel is segmented into a main panel and a separate dust flap portion. The dust flap is a distinct fabric element that can be independently secured, allowing the main panel to remain intact while still providing wheel passage. This segmentation resolves the contradiction by maintaining panel integrity while enabling rolling support attachment.
Solution Approach 2:
A dust flap acts as an intermediary element between the bottom panel and the external environment. It provides a controlled passage for caster wheels while blocking dust penetration. The dust flap mediates between the need for wheel access and the need to protect the inner storage volume from contaminants.
2Reliability
If the rolling support assembly is securely attached, then support is provided for the tote bag, but the attachment structure becomes complex
Solution Approach 1:
The retaining structure is merged with the bottom panel as an integrated assembly. The dust flap and retaining structure work together as a unified system that provides both support stability and simplified attachment. This merging reduces overall complexity compared to separate attachment mechanisms.
Solution Approach 2:
The retaining structure with overlapping flaps and fastening elements provides self-aligning attachment capability. The structure automatically positions itself during assembly, reducing the need for complex alignment procedures or additional adjustment mechanisms. This self-service feature simplifies the attachment process while maintaining support stability.
3Strength
If the bottom corners are supported, then wear and tear is prevented, but the structure becomes more complex
Solution Approach 1:
The retaining structure provides localized support specifically at the bottom corners and edges where wear occurs. By concentrating support where it is most needed rather than providing uniform support across the entire bottom panel, the structure achieves enhanced durability without unnecessary complexity. The overlapping flaps specifically target corner protection.
Data Source
AI summary
A rolling tote bag including a collapsible container body made of a foldable assembly of fabric panels, including a bottom panel and side panels, that jointly define an inner storage volume when in an expanded state. The rolling tote bag further includes a removable rolling support assembly positioned underneath the bottom panel to provide rolling support for the collapsible container body in the expanded state, the removable rolling support assembly including a support plate and a plurality of caster wheels provided on an underside of the support plate. The collapsible container body further includes a retaining structure formed of one or more fabric panels, which retaining structure is provided underneath the bottom panel and is configured to securely hold the support plate outside of the inner storage volume against an underside of the bottom panel.