Waterproof Suitcase with Segmented Base and Lid
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Solution Overview
Problem
Suitcases often suffer damage and moisture ingress during travel, and existing designs lack effective protection and ease of movement.
Innovation Solution
A suitcase design featuring a durable, waterproof structure with a base and lid connected by hinges, including a latch assembly and wheel assemblies for mobility, and an extendable trolley handle for ease of transport.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a suitcase is made durable and waterproof to protect contents, then protection against damage and moisture ingress is improved, but weight and device complexity increase
Solution Approach 1:
The suitcase is divided into a base and a lid as separate components that can be connected and disconnected. This segmentation allows each part to be optimized independently for durability and waterproofing while maintaining overall system simplicity. The base contains the wheel assemblies and support structures, while the lid contains the closure mechanisms, distributing complexity across modules.
Solution Approach 2:
The latch assembly is pre-configured with latch arms and engagement features that automatically secure when the lid closes. The waterproof sealing is built into the structure through pre-formed gaskets and sealed joints between the base and lid, eliminating the need for complex active sealing mechanisms during operation.
2Ease of operation
If wheel assemblies and trolley handle are added for ease of movement, then ease of operation is improved, but weight increases
Solution Approach 1:
The trolley handle is designed to be extendable and retractable, allowing the user to adjust its length based on handling needs. The handle can be extended for pulling the suitcase over long distances and retracted when the suitcase needs to be maneuvered in tight spaces or stored, reducing unnecessary weight during different operational phases.
Solution Approach 2:
The wheel assemblies are positioned at the base to provide stable support and reduce the effective weight burden on the user during pulling. The distribution of weight through the wheel contact points with the ground creates a counterbalancing effect that eases the effort required to move the suitcase.
3Reliability
If latch assembly with deep recesses is integrated into the shell structure, then reliability of closure is improved, but manufacturing precision requirements increase
Solution Approach 1:
The latch assembly is implemented as a separate, modular component rather than being integrally molded into the shell structure. This allows the latch mechanism to be manufactured independently with standardized tolerances and then assembled into pre-formed recesses in the base and lid, reducing the overall manufacturing precision requirements compared to creating deep, complex recesses in single-piece shells.
Solution Approach 2:
The latch arms serve as intermediary components that bridge the base and lid structures. Instead of requiring precise integration of closure features directly into the shell walls, the latch arms provide a flexible intermediate element that can accommodate reasonable variations in recess positioning while still achieving reliable engagement.
Data Source
AI summary
A suitcase having a base and a lid where the lid may be rotatable about a hinge from a closed configuration to an open configuration and may be secured, via one or more latching assemblies is disclosed. The lid may comprise an upper shell, and the base may comprise a lower shell. The upper shell and the lower shell may be seamlessly formed to create a water resistant and/or waterproof suitcase. The suitcase may have an extendable trolley handle assembly that is externally attached to the base of the suitcase using a plurality of mounting clips. The trolley handle assembly may comprise a pair of extrusion assemblies that are connected to the base of the suitcase and connected to each other by a grip. The suitcase may also have a removably secured interior liner.