Suspension Membrane Headrest Design to Reduce Weight and Complexity
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Solution Overview
Problem
Traditional passenger seat headrests are heavy, bulky, and complex to manufacture, which hinders the goal of creating lighter, simpler, and more visually appealing designs that enhance fuel economy and passenger comfort.
Innovation Solution
A suspension headrest design featuring a perimeter frame with a suspension membrane held in tension across an open central region, providing support and cushioning without the need for a heavy internal structure, and allowing for customizable aesthetics and reduced weight through materials like two-way stretch fabric and integrated reinforcement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If traditional passenger seat headrests are manufactured with internal frames covered with cushions and outer panels, then structural support and passenger comfort are provided, but the headrests become heavy, bulky, and complex to manufacture
Solution Approach 1:
The patent removes the traditional internal frame, cushions, and outer panels from the headrest structure. Instead, it uses a suspension membrane stretched over a simplified perimeter frame, extracting only the essential support function while eliminating unnecessary components that add weight and complexity.
Solution Approach 2:
The patent employs a suspension membrane (a thin film structure) stretched in tension across the perimeter frame to provide both structural support and passenger comfort. This flexible membrane replaces the traditional multi-layer construction of cushions and panels, significantly reducing weight and manufacturing complexity while maintaining the required comfort and support functions.
2Ease of manufacture
If a membrane is stretched in tension over a supporting structure to provide support and cushion, then the headrest becomes lighter and simpler, but manufacturing precision and tension uniformity become critical challenges
Solution Approach 1:
The patent incorporates a curved or contoured perimeter frame design that naturally guides the suspension membrane into a uniform tension state. The curvature of the frame structure helps distribute forces evenly across the membrane, reducing the risk of localized stress concentrations and simplifying the manufacturing process by providing built-in geometric guidance for membrane installation.
Solution Approach 2:
The patent utilizes the elastic properties of the suspension membrane material, allowing it to be stretched and secured in a tensioned state. By selecting materials with appropriate elastic moduli and stretch characteristics, the membrane can be installed with uniform tension through controlled stretching, ensuring consistent performance without requiring extremely tight manufacturing tolerances.
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 suspension headrest offers improved comfort and aesthetic customization while reducing weight and manufacturing complexity, achieving lighter and more efficient passenger seat components.
Implementation Method 1
The suspension membrane may be held in tension across the open central region of the perimeter frame and may deflect into the open central region when load is applied to the suspension membrane
Data Source
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AI summary
Described are lightweight headrests (1) with a perimeter frame (200) with an open central region (203). The open central region is spanned by a suspension membrane (100) held in tension. The suspension membrane provides support and cushioning functions to a passenger head without the need for internal structures or compression cushions. The perimeter frame of the headrest has at least one cross member (208, 210) spanning the rear portion of the headrest. The cross member is configured so as to allow the position of the cross member to be altered on the perimeter frame.