Aircraft Door Latching Block Decoupling for Emergency Passage
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Solution Overview
Problem
Conventional passage doors in aircraft mini-suites are overly mechanically complex, prone to jamming, and may obstruct passenger movement when emergency passage features are deployed, as they often require different opening forces and mechanisms for normal and emergency operations.
Innovation Solution
A door assembly with a latching block that aligns with a slide axis, allowing the door to slide with a carriage assembly in normal mode but decoupling for independent sliding in emergency mode using a greater opening force, ensuring the door can open without obstructing the aisle and simplifying resetting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional EPF systems are used, then emergency access is provided, but the door becomes overly mechanically complex and prone to jamming
Solution Approach 1:
The patent merges the normal operation carriage assembly and emergency passage door into a single integrated system. The carriage assembly serves dual purposes: guiding the door during normal operation and providing the emergency passage route when deployed. This eliminates the need for separate, independent EPF mechanisms, thereby reducing overall system complexity while maintaining reliability.
Solution Approach 2:
The carriage assembly is designed with multi-functionality, serving both as the normal operation guidance mechanism and as the emergency passage structure. The slide track and carriage components can accommodate both the door assembly during normal use and the emergency passage configuration, allowing one component system to perform multiple functions and reducing the number of separate parts needed.
2Reliability
If conventional EPF systems are used, then emergency access is provided, but the door may open into passenger aisles obstructing passenger movement
Solution Approach 1:
The patent transitions from a conventional hinged door opening motion (which swings into the aisle) to a linear sliding motion along a predetermined slide track. This dimensional change in movement trajectory allows the door to open directly into the wall or floor rather than into the passenger aisle, eliminating obstruction while maintaining emergency access capability.
3Ease of operation
If separate opening forces are used for normal and emergency modes, then specific operational requirements are met, but the operation becomes more complex
Solution Approach 1:
The latching mechanism is designed with dynamic characteristics that automatically respond to applied force magnitude. Under normal operation forces, the latch engages with the carriage assembly to guide door movement. When greater emergency forces are applied, the latch dynamically transitions to disengage from the carriage assembly, allowing the door to slide independently along the emergency passage route. This dynamic response eliminates the need for separate control mechanisms.
Data Source
AI summary
Described are passenger door assemblies including emergency passage feature assemblies. For example, a door assembly may include a latching block configurable to retain a latching spigot of a carriage assembly responsive to a first opening force. The door assembly may also be configurable to release the latching spigot to enable sliding movement of the latching block independent of the carriage assembly responsive to a second opening force.