Aircraft Seat Tray Table and Armrest Layout for Impact Absorption
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Solution Overview
Problem
Conventional aircraft seating designs lack flexibility and safety features, with tray tables often fixed or limited in position, and armrests not easily interchangeable or adaptable to different configurations, which can lead to inefficiencies in space use and stress distribution during aircraft movements.
Innovation Solution
The seating assemblies feature tray tables integrated into seat backs with adjustable arms, universal armrests that can be configured as fixed or pivotable, and luggage bars that absorb bending stresses, along with controllers repositioned on the seat frames for improved cable routing and reduced armrest complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If tray tables are fixed in position or limited in movement, then structural simplicity is maintained, but passenger safety and comfort are reduced due to inability to absorb impact forces
Solution Approach 1:
The tray table is designed with dynamic movement capability, allowing it to pivot between horizontal and vertical positions. The arm supporting the tray table can rotate about a vertical axis and the entire assembly can tilt forward, transforming from a static structure to a dynamic one that can absorb impact forces during crashes while maintaining structural integrity
Solution Approach 2:
The tray table and arm assembly are designed to function as energy-absorption elements during aircraft crashes. The harmful impact forces that would otherwise injure passengers are converted into beneficial energy dissipation through the controlled deformation and movement of the tray table mechanism, protecting passenger heads and bodies
2Adaptability or versatility
If armrests are designed as fixed or simple pivot structures, then manufacturing complexity is reduced, but versatility and adaptability are limited
Solution Approach 1:
The armrest is designed as a universal component that can function in multiple configurations. By incorporating a rotatable joint and locking mechanism, the same armrest structure can be locked in a fixed horizontal position for stability or allowed to pivot freely for passenger comfort, eliminating the need for different armrest types for different seating positions
Solution Approach 2:
The armrest incorporates dynamic elements including a rotatable joint that allows movement between fixed and pivoting modes. This dynamic capability enables the armrest to adapt to different operational requirements while maintaining a relatively simple base structure that can be manufactured using standard processes
3Device complexity
If controllers are placed in cavities within armrests, then cable routing is simplified, but armrest thickness and weight increase
Solution Approach 1:
The controllers are extracted from the armrest cavity and relocated to the seat frame structure. This separation removes the unnecessary weight and complexity from the armrest while maintaining simplified cable routing through the seat frame, allowing the armrest to be thinner and lighter without compromising cable management
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances passenger safety by allowing tray tables to absorb impact forces, provides flexible and adaptable seating arrangements, and improves stress distribution and cable management, resulting in a more efficient and safer seating experience.
Implementation Method 1
the tray tables may function as energy-absorption elements in the event they are contacted by passenger heads or bodies (during aircraft crash, for example)
Implementation Method 2
Such bars conventionally function solely to help retain underseat luggage in place; they do not absorb bending stresses to which a front leg of a seating assembly may face. By contrast, those of the present invention are configured to absorb some of these bending stresses
Data Source
AI summary
Multiple features of seating assemblies are detailed. Innovations in or to tray tables, luggage bars, arm rests, seat backs, and seat frames are included, with features being incorporated into seating assemblies either separately or in any combination. The assemblies are configured principally for passenger aircraft but may be used elsewhere as appropriate or desired.