Vehicle Headrest Pivot Spring for Rear Visibility and Comfort
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Solution Overview
Problem
Existing vehicle seat headrests are not easily operable and do not provide sufficient comfort, as they often obstruct the view and can be uncomfortable when not in use due to their design.
Innovation Solution
A headrest for a vehicle seat that is adjustable in height and inclination, featuring a U-shaped tube section as the axis of rotation, coupled with a double torsion spring for automatic alignment in the use position, avoiding contact with the torso and improving comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the headrest is made retractable to improve rear visibility, then the view to the rear is improved, but the headrest may contact the occupant's torso causing discomfort
Solution Approach 1:
The headrest is designed with dynamic movement capability, allowing it to transition between retracted and extended positions. The spring element provides automatic return force to ensure the headrest maintains proper vertical alignment and does not contact the occupant's torso, resolving the contradiction between improved visibility and comfort.
2Ease of operation
If the headrest is made adjustable in height and inclination, then seating comfort is improved, but the device complexity increases
Solution Approach 1:
The holding element combines multiple functions into a single component: it serves as both the height adjustment mechanism and the inclination adjustment pivot point. The spring element is integrated into this holding element, further consolidating the adjustment mechanisms and reducing overall device complexity while maintaining comfort adjustment capabilities.
Solution Approach 2:
The holding element acts as a multi-functional component that enables both height adjustment and inclination adjustment. The horizontal section provides the rotation axis for inclination while the vertical sections enable height positioning, allowing one component to perform multiple adjustment functions.
3Ease of operation
If the headrest is positioned to provide head support, then seating comfort is improved, but the rear view is obstructed
Solution Approach 1:
The headrest is designed to be dynamically positionable, automatically retracting when not in use to maintain an unobstructed rear view. The spring element provides the force to automatically return the headrest to its retracted position, ensuring visibility is maintained while head support is available when needed.
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 headrest is easier to operate and more comfortable, providing an unobstructed view when not in use and protecting the occupant from injury by automatically aligning vertically when in the use position, thus enhancing seating comfort and safety.
Implementation Method 1
the headrest and holding element being coupled to a spring element in such a way that the headrest is subjected to a prestressing force of the spring element is. The pretensioning force automatically rotates a lower end of the headrest in the direction of the holding element
Data Source
AI summary
The invention relates to a head restraint (2) for a vehicle seat (1), wherein the head restraint (2) is disposed on a seat back (4) of the vehicle seat (1) so as to be adjustable in height in such a way that same can be adjusted from a non-usage position to a usage position. According to the invention the head restraint (2) is disposed on a retaining element (5) so that the inclination of the head restraint can be adjusted, where said retaining element is formed from a U-shaped tubular section and of which the horizontally disposed section (19) forms the axis of rotation of the head restraint (2), wherein the head restraint (2) and the retaining element (5) are coupled by means of a spring element (12) in such a way that a biasing force of the spring element (12) is applied to the head rest (2), wherein sections of the spring element (12) engage in respective cutouts (22) disposed on both sides in the region of rounded portions (21) of the retaining element (5), and the biasing force generated in this way rotates a lower end of the head rest (2) automatically in the direction of the retaining element (5) as the head rest (2) is moved from the non-usage position to the usage position.