Aircraft Overhead Bin Latch System with Redundant Segmented Hooks
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Solution Overview
Problem
Existing latch systems for aircraft overhead storage bins are unreliable, lacking in secure closure mechanisms that ensure proper latching and indication of proper closure status.
Innovation Solution
A latch system comprising a paddle button assembly, first and second latch assemblies, and cables that disengage hook and striker assemblies to allow bucket movement between open and closed positions, with an indicator to verify proper latching, ensuring secure closure and easy operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional latch systems are used for overhead storage bins, then the structure is simple, but the reliability is poor and they lack secure closure mechanisms
Solution Approach 1:
The latch system is divided into multiple independent latch assemblies (first latch assembly and second latch assembly), each capable of independent operation. This segmentation allows the system to achieve higher reliability through redundancy while maintaining manageable complexity by standardizing each modular unit.
Solution Approach 2:
The system incorporates an indicator mechanism that provides advance warning of the latched state before any potential failure occurs. The indicator is designed to clearly show whether the bucket is properly latched, allowing flight attendants to verify closure status and prevent unsafe operations.
2Reliability
If multiple locks are added to ensure secure closure, then the reliability improves, but the ease of operation decreases
Solution Approach 1:
Multiple latch assemblies are merged into a single integrated system controlled by one paddle button. When the button is pressed, it simultaneously actuates both latch assemblies through connected cables, allowing secure multi-point latching to be achieved with a single simple operation rather than requiring separate actions for each latch.
Solution Approach 2:
The paddle button serves multiple functions: it acts as the primary actuator for both latch assemblies, provides a clear visual and tactile indicator of the latched state, and ensures simultaneous engagement of multiple security points. This multi-functionality maintains ease of operation while achieving reliable secure closure.
3Measurement precision
If visual indicators are added to verify proper latching, then the reliability of verification improves, but the device complexity increases
Solution Approach 1:
The indicator mechanism is designed to automatically display the latched state without requiring additional components or complex mechanisms. The indicator is directly linked to the latch assembly position, so it self-activates based on the mechanical state of the latches, providing precise verification while minimizing added complexity through its self-regulating design.
Data Source
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AI summary
A latch system that includes a paddle button assembly having a button that is movable between a home position and an actuation position, a first latch assembly that includes a first striker assembly and a first hook assembly, and a first cable that extends between the paddle button assembly and the first latch assembly. Movement of the button from the home position to the actuation position moves the first cable, thereby disengaging the first hook assembly and the first striker assembly.