Aircraft Divan Track Mechanism for Upright-to-Bed Conversion
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Solution Overview
Problem
Current aircraft divans lack a suitable solution for conversion from an upright seating position to a berth orientation, failing to provide a flexible and safe sleeping configuration that accommodates passenger preferences during longer flights.
Innovation Solution
A divan design featuring a seat pan and backrest connected via tracks and brackets, allowing for transition between upright, slouch, and berth positions, with mechanical operation to minimize weight and maximize flexibility, while ensuring compliance with safety regulations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a divan is designed to convert from upright seating to berth position, then passenger comfort and flexibility are improved, but device complexity increases due to additional mechanical components
Solution Approach 1:
The divan is divided into separate functional components: a base structure, a seat pan, and a backrest. Each component can move independently along defined tracks, allowing the divan to transition between configurations without requiring a completely reconfigurable monolithic structure.
Solution Approach 2:
The divan employs dynamic elements including sliding tracks that allow linear movement, pivot points that enable rotational movement, and linkages that coordinate the motion of multiple components. These dynamic mechanisms allow smooth transitions between upright seating, slouching, and berth positions.
2Ease of operation
If mechanical operation mechanisms are added for position conversion, then ease of operation is improved, but weight increases which reduces aircraft range
Solution Approach 1:
The divan's mechanical system is designed to be manually operated by passengers without requiring motors, actuators, or external power sources. The conversion between positions is achieved through manual manipulation of the mechanical linkages and sliding components, eliminating the weight of electrical or pneumatic actuation systems.
3Adaptability or versatility
If the divan is designed to avoid immovable obstacles like fuselage walls, then adaptability is improved, but device complexity increases due to track and bracket systems
Solution Approach 1:
Fixed tracks are embedded in the aircraft floor structure to guide the movement of the divan's base. These tracks act as intermediaries that constrain the divan's motion paths, ensuring it moves along safe trajectories that avoid collision with fuselage walls and other obstacles while simplifying the overall control mechanism.
4Adaptability or versatility
If multiple position configurations are implemented, then passenger comfort is improved, but manufacturing precision requirements increase
Solution Approach 1:
The movement system is segmented into discrete stages with defined stop positions for each configuration (upright, slouching, berth). Each segment has its own tracking and positioning mechanism, allowing manufacturing tolerances to be managed locally at each stage rather than requiring perfect precision across the entire range of motion.
Data Source
AI summary
An aircraft divan includes a lateral bracket connecting between front and rear legs with lateral bracket front and rear ends, a first track defined by the lateral bracket between the lateral bracket front and rear ends, an upright, having upright top and bottom ends, a second track defined by the upright between the upright top and bottom ends, a seat pan having seat pan front and rear ends, the seat pan being slidingly connected to the first track adjacent to the seat pan rear end, and a backrest having backrest top and bottom ends, the backrest being slidingly connected to the second track adjacent to the backrest top end. The seat pan rear end is pivotably connected to the backrest adjacent to the backrest bottom end such that movement of the seat pan is transmitted to the backrest so as to move together between upright and berth positions.