Variable Reclination Backrest Limiter for Aircraft Seats
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Solution Overview
Problem
Commercial aircraft seat backrests have a fixed reclination range, which reduces passenger space when reclined, especially in tight seating configurations, and existing systems lack the ability to efficiently adjust reclination ranges during seat configuration changes between flights.
Innovation Solution
A seat assembly with a variable reclination range limiter that adjusts the reclination range between fully upright and fully reclined positions, using a recline piston and pivot axle with a moveable restricting member or stroke-limiting sleeve to set a limited reclination position, allowing quick adjustments to seat configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the backrest is allowed to recline to a fully reclined position, then passenger comfort is improved, but space for the passenger behind is reduced
Solution Approach 1:
The patent implements a dynamic reclination range limitation system where the maximum reclination angle can be adjusted between flights. During flights, the backrest can recline to a limited position that balances comfort with space constraints. Between flights, operators can reconfigure the reclination range by adjusting the limitation mechanism, allowing the system to adapt to different seating density requirements without being permanently fixed.
2Productivity
If the pitch between rows of seats is reduced to increase seating capacity, then productivity is improved, but passenger space is further reduced when seats are reclined
Solution Approach 1:
The patent changes the parameter of reclination range from a fixed value to an adjustable value. By implementing an adjustable limitation mechanism, the system can modify the maximum reclination angle to accommodate different pitch configurations. When pitch is reduced for higher capacity, the reclination range is correspondingly limited to maintain adequate space, allowing operators to optimize both capacity and comfort based on flight requirements.
3Device complexity
If the backrest has a fixed reclination range, then device complexity is reduced, but adaptability to different seat configurations is worsened
Solution Approach 1:
The patent introduces a dynamic adjustment capability to the backrest mechanism that allows the reclination range to be modified between flights. The limitation mechanism can be repositioned to accommodate different seat configurations and pitch requirements. This dynamic feature provides adaptability without requiring a completely complex redesign, as the basic backrest structure remains the same while its operational parameters can be changed.
Solution Approach 2:
The system changes the fixed parameter of reclination range into a variable parameter that can be adjusted according to different operational requirements. By implementing an adjustable limitation mechanism, the backrest can adapt to various seat configurations, pitch distances, and cabin layouts, providing versatility while maintaining a relatively simple mechanical structure that doesn't require complete redesign for different configurations.
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
Enables efficient and quick adjustment of reclination ranges to prevent space encroachment on adjacent passengers, maintaining passenger comfort and space during seat configuration changes without requiring extensive reconfiguration.
Implementation Method 1
a recline piston is coupled to the backrest
Implementation Method 2
a pivot axle that defines a pivot point for the backrest
Data Source
AI summary
A seat assembly includes a backrest that is configured to recline over a reclination range, and a variable reclination range limiter that is configured to selectively adjust a limit of the reclination range limit. A variable reclination range limiting method for a seat assembly includes allowing a backrest of the seat assembly to recline over a reclination range, and selectively adjusting a limit of the reclination range by a variable reclination range limiter.