Tool-Free Hinge for Nestable Car Top Carrier
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Solution Overview
Problem
Car top carriers are bulky, difficult to assemble, store, and transport due to their large size and requirement of tools for assembly, limiting their usage and storage capabilities.
Innovation Solution
A car top carrier design featuring a hinge that allows for tool-free assembly and nesting capabilities, enabling easy connection and separation of the carrier top and bottom, which can be stored compactly by rotating one inside the other.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a car top carrier uses a traditional hinge requiring tools for assembly, then the hinge provides stable connection, but the assembly process becomes complex and time-consuming
Solution Approach 1:
The hinge is divided into two separate halves that can be independently handled. One half is attached to the carrier bottom and the other to the carrier top, allowing tool-free assembly through simple alignment and engagement without requiring complex tooling or assembly procedures
Solution Approach 2:
The carrier top and carrier bottom are designed to nest within each other when not in use. The smaller carrier top fits inside the carrier bottom, creating a compact storage configuration that significantly reduces storage space requirements and facilitates easy storage in vehicle trunks or garages
2Strength
If the car top carrier is designed as a single integrated unit, then structural strength is improved, but storage space requirements increase significantly
Solution Approach 1:
The carrier is segmented into two functional halves (carrier bottom and carrier top) that can be separated and nested when not in use. This segmentation allows the carrier to maintain full structural strength when assembled for use while reducing to a fraction of its operational volume during storage
Solution Approach 2:
The carrier top nests inside the carrier bottom when separated, creating a compact storage configuration. This nesting capability reduces the storage volume from the full carrier size to approximately one-quarter of the operational volume, solving the storage space problem while maintaining structural integrity during use
3Quantity of substance
If the car top carrier is made bulky to provide sufficient storage capacity, then cargo capacity is improved, but ease of storage and transportation deteriorates
Solution Approach 1:
By segmenting the carrier into two halves that can be nested, the system provides full cargo capacity when assembled but reduces to a compact nested form for storage. This segmentation allows the carrier to deliver maximum cargo capacity when needed while being easy to store when not in use
Solution Approach 2:
The nesting design allows the carrier to transition from a bulky operational state with full cargo capacity to a compact storage state. The carrier top fits inside the carrier bottom, creating a space-efficient storage solution that maintains full cargo capacity functionality when assembled
4Ease of operation
If tool-free assembly is implemented, then ease of assembly is improved, but hinge connection reliability may deteriorate
Solution Approach 1:
The segmented hinge design with two separate halves enables tool-free assembly through simple alignment and engagement. The segmentation allows for easy installation while incorporating features like protrusions and recesses that ensure reliable connection without requiring tools
Solution Approach 2:
The nesting mechanism itself serves as the connection method, where the carrier top nests into the carrier bottom with integrated hinge engagement. This nested configuration provides both ease of assembly and reliable connection through the interlocking nested structure
Data Source
AI summary
A car top carrier with a carrier bottom and a carrier top are be connected by a hinge without the use of tools. The carrier bottom and the carrier top, which form the car top carrier, are nestable when not connected by the hinge.