Headrest Support Bar Mounting with Elastic Contact Regions
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Solution Overview
Problem
Existing bearing devices for vehicle seat headrests fail to compensate for tolerances in the shape and distance between support rod ends, leading to rattling and unreliable mounting.
Innovation Solution
A bearing device with multiple contact regions distributed around the support rod, featuring elastic connecting elements that allow radial movement and are supported by a spring mechanism to maintain secure, rattle-free mounting despite shape and distance deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rigid contact areas are used to securely mount the support rod, then mounting reliability improves, but tolerance compensation deteriorates
Solution Approach 1:
The contact areas are designed to be movable relative to the support rod through elastic connecting elements, allowing the bearing device to dynamically adapt to tolerance variations while maintaining secure mounting. The elastic elements enable the contact areas to self-adjust their position within the opening.
Solution Approach 2:
The elastic connecting elements change their deformation state based on the support rod's position and tolerances, allowing the contact areas to automatically adjust their engagement parameters with the support rod surface, thereby compensating for dimensional variations.
2Adaptability or versatility
If multiple contact regions are distributed around the support rod, then tolerance compensation improves, but device complexity increases
Solution Approach 1:
The bearing device is segmented into multiple independent contact regions, each capable of independent movement and force application. This segmentation allows distributed tolerance compensation around the support rod while maintaining a relatively simple overall structure through modular design.
3Adaptability or versatility
If elastic connecting elements with radial movement capability are used, then tolerance compensation improves, but mounting precision deteriorates
Solution Approach 1:
The elastic connecting elements automatically self-adjust their radial position based on the support rod's actual location and orientation, eliminating the need for precise pre-positioning or complex adjustment mechanisms. The system self-compensates for mounting variations through the elastic deformation of the connecting elements.
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
Ensures the headrest is securely mounted without rattling, even with variations in support rod dimensions and distances, by distributing forces and allowing for radial adjustment.
Implementation Method 1
a spring element (26) which acts on the resilient tongue (25) and exerts a radial force (F) on the resilient tongue (25), so that the tongue (25) is loaded against the support rod (13a)
Implementation Method 2
a spring element (26) which acts on the resilient tongue (25) and exerts a radial force (F) on the resilient tongue (25)
Implementation Method 3
at least one of the bearing elements is flexible to establish a frictional connection with the support rod
Implementation Method 4
The connecting element is designed to be elastic and radially movable
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The invention relates to a mounting device for a support bar (13a, 13b) of a headrest (11) for vehicle seats, having at least one frame (16), which forms an opening (17), which can be penetrated by the support bar (13a, 13b), the frame (16) surrounding the openings (17) at least in part, and the mounting device (10) having at least one contact region (18) for bearing against the outer face (27) of the support bar (13a, 13b), which contact region is connected by a connection element to a retaining region (28), which is formed on the frame (16).