Vehicle Headrest Friction Hinge for Adjustable Side Support
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Solution Overview
Problem
Existing headrests in automobiles face a challenge in balancing strength, comfort, and cost, with complicated adjustment mechanisms often compromising one or more of these factors.
Innovation Solution
A headrest assembly featuring a housing with moveable side panels pivotally connected by spring clips and pins, allowing adjustable support angles through a cam mechanism, enhancing positional comfort and stability while maintaining structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If complicated adjustment mechanisms are used to provide positional comfort for varying user sizes and preferences, then adaptability is improved, but device complexity increases
Solution Approach 1:
The headrest is divided into multiple independent panels (central panel and side panels) that can be adjusted separately. Each side panel is connected to the central panel through a spring clip mechanism that allows independent angular adjustment, enabling customized positioning for different users without requiring a complex unified adjustment system.
Solution Approach 2:
The spring clip mechanism provides dynamic adjustment capability where the side panels can be rotated to different angles and locked into position. The cam portion and pin interaction creates a friction hinge effect that maintains the adjusted position while allowing easy repositioning, providing both stability and adaptability.
2Strength
If stronger materials and components are used to withstand impact and prevent whiplash, then strength is improved, but weight increases
Solution Approach 1:
The spring clip acts as a flexible mechanical element that provides both structural support and impact absorption. The elastic deformation of the spring clip during impact events dissipates energy while maintaining headrest integrity, reducing the need for heavier rigid materials.
Solution Approach 2:
The headrest combines rigid panels for structural strength with flexible spring clip elements for impact absorption. This composite approach integrates different material properties (rigid and flexible) to achieve both strength and weight efficiency, where the spring clip provides mechanical advantage in absorbing impact forces.
3Adaptability or versatility
If multiple separate components are used to allow positional adjustment, then adaptability is improved, but manufacturing cost increases
Solution Approach 1:
The spring clip integrates multiple functions into a single component: it serves as a connection element between panels, a friction hinge mechanism for rotation, a positioning system through the cam and pin interaction, and a locking mechanism. This consolidation reduces the number of separate parts needed, simplifying manufacturing and assembly while maintaining full adjustability.
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 assembly provides adjustable support for varying user sizes and preferences, improving comfort and safety without increasing weight or production costs, while maintaining robustness.
Implementation Method 1
a first spring clip connecting the first side panel to a first side of the central panel. The headrest assembly yet further includes a second spring clip connecting the second side panel to a second side of the central panel
Implementation Method 2
Each of the first spring clip and the second spring clip also includes a cam portion in contact with the respective pin to maintain an angular position of the first side panel and the second side panel relative to the central panel
Data Source
AI summary
A headrest assembly for use in a vehicle includes a housing having a front portion and a rear portion. The headrest assembly also includes an armature operatively coupling the rear portion to a seatback of an automobile seat. The front portion includes a central panel, a first side panel, and a second side panel, wherein the first side panel pivots relative to the central panel about a first vertical axis, and the second side panel pivots relative to the central panel about a second vertical axis. The headrest assembly also includes a first spring clip assembly connecting the first side panel to a side of the central panel and a second spring clip assembly connecting the second side panel to an opposite side of the central panel, the first and second spring clip assemblies maintaining an angular position of the first and second side panels absent manual adjustment.