Dual-Function Hinge Latch for Car Top Carrier Thermal Adaptation
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Solution Overview
Problem
Hinge/latch mechanisms in car top carriers often fail to account for temperature variations, leading to difficulties in opening and closing the carriers, especially in extreme weather conditions, and may result in improper latching, which can cause theft or accidental opening at high speeds.
Innovation Solution
A dual-functioning hinge/latch mechanism with a pair of coordinated systems mounted on opposing sides of the carrier, connected by a drive bar accessible from the exterior, which allows for easy operation and indicates the latching status through a handle assembly that can rotate to open or close the carrier, accommodating temperature changes and ensuring secure engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional hinge/latch mechanisms are used in car top carriers, then the structure is simple, but the mechanism fails to account for temperature variations causing expansion and contraction, making it difficult to open and close in extreme weather conditions
Solution Approach 1:
The hinge/latch mechanism incorporates components with different coefficients of thermal expansion to compensate for temperature variations. The mechanism is designed to accommodate expansion and contraction of the carrier body during temperature changes, maintaining proper clearance and engagement without binding or failing to engage.
Solution Approach 2:
The hinge/latch system uses flexible or resilient components that can dynamically adjust to temperature-induced dimensional changes. The mechanism allows for movement and adjustment within the hinge joint to accommodate thermal expansion and contraction, ensuring continuous operability across varying temperature conditions.
2Reliability
If traditional hinge/latch mechanisms are used, then the device complexity is low, but the latching status may be unclear, allowing users to think the carrier is locked when latches are not properly engaged
Solution Approach 1:
The hinge/latch mechanism incorporates visual feedback indicators that clearly show whether the carrier is properly latched or unlatched. These indicators provide immediate feedback to the user about the latching status, eliminating uncertainty about whether the carrier is securely closed without requiring complex additional systems.
3Reliability
If multiple latches are used to improve security, then the reliability of secure closure increases, but the device complexity and difficulty of operation increase
Solution Approach 1:
The mechanism combines multiple latch functions into a single integrated hinge/latch assembly. By merging the hinge and latch functions and coordinating multiple latches through a common drive bar, the system maintains high security through multiple engagement points while allowing all latches to be operated simultaneously with a single user action.
Solution Approach 2:
The hinge/latch mechanism is designed as a multi-functional system where a single mechanism performs multiple functions: providing structural support as a hinge, securing the carrier with multiple latches, and indicating latching status. This universal design consolidates multiple security functions into one operable system, maintaining security while simplifying user interaction.
Data Source
AI summary
A car top carrier incorporating improved dual-functioning hinge/latch mechanisms connected by a drive bar that translates pivotal rotation to open and close the carrier.