Friction Module Headrest Adjustment Mechanism
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Solution Overview
Problem
Existing airplane seat headrests face challenges in providing a lightweight, adjustable, and maintenance-friendly solution that ensures safety and comfort while accommodating varying passenger heights, with a need for improved adjustment mechanisms to reduce maintenance time and increase aircraft service time.
Innovation Solution
An adjustable headrest system featuring a guide coupled to a seat, a head support movable along an adjustment path, and a slider with a retainer to maintain friction between components, preventing unintended movement and including a bracket for fixation, along with a quick release assembly for easy adjustment and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional headrest adjustment mechanism is used, then the headrest can be adjusted to different heights, but the mechanism becomes complex and requires frequent maintenance
Solution Approach 1:
The adjustment mechanism is divided into discrete friction modules, each comprising a slider, guide, and retainer component. This segmentation allows for simplified individual components that can be easily manufactured and maintained, while collectively providing the full adjustment range when assembled together.
2Ease of operation
If a traditional headrest adjustment mechanism is used, then the headrest can be adjusted to different heights, but maintenance time increases and aircraft service time decreases
Solution Approach 1:
The friction-based adjustment mechanism is designed to be inherently self-regulating and self-latching. Once the headrest is adjusted to the desired height, the retainer component automatically engages with the slider to maintain the position without requiring additional locking actions or complex control systems, thereby minimizing maintenance intervention.
3Weight of moving object
If a lightweight headrest is used, then fuel costs decrease, but the headrest may lack sufficient safety and comfort
Solution Approach 1:
The friction modules utilize adjustable friction parameters through the retainer component to optimize the balance between weight and reliability. By controlling the friction force between the slider and guide surfaces, the mechanism provides sufficient holding strength to support headrest weights of 5-10 pounds while maintaining lightweight construction and ensuring safety and comfort.
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
The solution provides a lightweight, adjustable headrest that maintains desired height settings, reduces maintenance time, and ensures safety and comfort by preventing unintended movement and facilitating easy adjustment, thereby increasing aircraft service time.
Implementation Method 1
A retainer is positioned to urge the surface of the slider against the surface of the guide, thereby maintaining friction between the surface of the slider and the surface of the guide and resisting unintended movement of the slider with respect to the guide along the adjustment path.
Data Source
AI summary
Adjustable headrest including a guide configured to be coupled to a seat; a head support coupled to the guide and configured to be movable along an adjustment path relative to the seat; and a slider having a surface defining a recess receiving the guide. A retainer is positioned to urge a surface of the slider against a surface of the guide, thereby maintaining friction between the surface of the slider and the surface of the guide. Additionally, the adjustable headrest includes a bracket that is fixable relative to the head support or fixed relative to the seat. The bracket has a mounting section positioned for fixation relative to the head support or for fixation to the seat and a guide receiving portion receiving the guide. The slider and the bracket are separate components and are formed from the same material or different materials.