Aircraft Divan Track Linkage for Seat-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 complies with safety regulations while avoiding immovable obstacles within the aircraft cabin.
Innovation Solution
A divan design featuring a seat pan and backrest connected via pivotable brackets and tracks, allowing the divan to transition between upright seating, slouch, and berth positions, with the seat pan and backrest sliding and pivoting to accommodate different configurations, including a V-shaped track system for multiple seating positions, ensuring compatibility with aircraft safety guidelines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the divan is designed to convert between upright seating and berth positions, then passenger comfort and flexibility are improved, but the device complexity increases due to additional mechanical components
Solution Approach 1:
The divan employs dynamic mechanical linkages including pivotable brackets, sliding tracks, and drag links that enable the furniture to transition between multiple configurations (upright seating, slouch, and berth positions). The seat pan, backrest, and armrests are connected through a system of pivots and sliders that allow continuous movement and reconfiguration, transforming a static piece of furniture into a dynamic, multi-position system.
Solution Approach 2:
The divan is divided into separate functional segments including the seat pan, backrest, armrests, and base, each connected through independent mechanical linkages. This segmentation allows each component to move and adjust independently while maintaining overall structural integrity, enabling complex reconfiguration through coordinated movement of discrete parts.
2Weight of moving object
If the divan uses a mechanically operated system with lightweight materials, then the weight is reduced to enhance aircraft range, but the manufacturing precision requirements increase
Solution Approach 1:
The divan utilizes composite construction combining lightweight materials such as aluminum or aluminum alloys for the frame and structural components, with upholstered panels and cushioning materials. This composite approach reduces overall weight compared to traditional solid wood or metal construction while maintaining structural strength and durability required for aircraft applications.
Solution Approach 2:
The mechanical linkages are designed with adjustable parameters including pivot points, slider positions, and link lengths that can be optimized during manufacturing to achieve the desired weight-to-strength ratio. The V-shaped track geometry and drag link dimensions are carefully calculated to provide smooth motion while minimizing material usage.
3Adaptability or versatility
If the seat pan and backrest are connected through pivotable brackets with V-shaped tracks, then the divan can achieve multiple seating positions, but the ease of operation decreases due to complex track mechanisms
Solution Approach 1:
Drag links serve as intermediary components that connect the seat pan and backrest assemblies, mediating the motion between these components. The drag links translate and coordinate the movement of the seat pan relative to the backrest, ensuring that both components move in a coordinated manner along their respective V-shaped tracks, which simplifies the operation compared to direct connection mechanisms.
Solution Approach 2:
The mechanical linkage system is designed to be manually operable without requiring external power sources or complex control systems. The pivotable brackets, sliding tracks, and drag links work together to enable smooth transitions between configurations through simple manual manipulation, allowing passengers or crew to reconfigure the divan independently.
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.