Vehicle Seat Headrest Mounting with Pivoting Sleeve Tolerance Compensation
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Solution Overview
Problem
Existing mounting devices for vehicle seat headrests face challenges in compensating for tolerances and dimensional variations while maintaining low friction during height adjustment, often requiring complex constructions and high assembly costs.
Innovation Solution
A mounting device with two guide sleeves and receptacle devices secured in the backrest, where the first guide sleeve is fixed at two axial bearing points and the second guide sleeve is pivotably held in the backrest, allowing for adjustment to compensate for dimensional variations without additional supports, thus reducing friction and assembly complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a complex mounting device with multiple components is used to compensate for tolerances, then dimensional variations are accommodated, but device complexity and assembly costs increase
Solution Approach 1:
The mounting device is divided into two independent guide sleeves (first and second), each capable of independent adjustment. The second guide sleeve can be adjusted in the transverse direction relative to the first guide sleeve, allowing each component to independently compensate for different aspects of dimensional variations in the headrest rods and receptacle devices.
Solution Approach 2:
The second guide sleeve is designed to be movable in the transverse direction within the second receptacle device, transforming a static rigid structure into a dynamic adjustable one. This dynamic capability allows the system to adapt to dimensional variations without requiring a complex pre-configured adjustable support structure.
2Ease of operation
If guide sleeves are configured with play or high adjustment forces to allow low friction adjustment, then adjustment ease is improved, but mounting precision and stability deteriorate
Solution Approach 1:
The second guide sleeve is designed to be movable in the transverse direction, creating a dynamic adjustment mechanism that compensates for dimensional variations. This movement capability allows the system to maintain precise positioning without requiring excessive adjustment forces or creating play between components.
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
This solution enables cost-effective production and simpler assembly while maintaining low friction during headrest height adjustment, accommodating tolerances and dimensional variations without excessive force, thereby reducing manufacturing and assembly costs.
Implementation Method 1
the second guide sleeve can be shifted at least in the transverse direction... the second guide sleeve rests in the second receptacle device
Implementation Method 2
ensuring a low level of friction during the height adjustment of the headrest... The first guide sleeve is held and rests at at least two axially spaced bearing points
Data Source
AI summary
Mounting device for a headrest with two headrest rods for a vehicle seat, which includes a first guide sleeve for the height-adjustable accommodation of a first headrest rod, a second guide sleeve for the height-adjustable accommodation of a second headrest rod, and a first receptacle device secured in the backrest, in which the first guide sleeve is held and rests at at least two axially spaced bearing points. A second receptacle device is secured in the backrest, within which the second guide sleeve can be shifted at least in the transverse direction. The second guide sleeve rests in the second receptacle device, which is secured in the backrest. Advantageously, the second guide sleeve is pivotably held in the second receptacle device, which is secured in the backrest, and the second headrest rod is pivotably held in the second guide sleeve.