Integrated Head Restraint Guide for Vehicle Seat Backrest
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Solution Overview
Problem
Existing motor vehicle seat backrests with height-adjustable head restraints are either costly or lack a pleasing aesthetic integration of the adjustment mechanism, and they often require complex external components that compromise stability and visibility.
Innovation Solution
A backrest design with an integrated height-adjustable head restraint guide, utilizing a transverse strut and guide rods or air chambers, where the control cable and driving mechanism are concealed within the backrest, allowing for stable and cost-effective adjustment in both x and z directions, maintaining a clean visual appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the head restraint guide is integrated completely in the head restraint, then the aesthetic appearance is improved, but the structural complexity increases
Solution Approach 1:
The guide device is nested within the head restraint structure, with guide rods and guide bores integrated into the existing head restraint components. The control cable is routed through the transverse strut and backrest structure, hiding all adjustment mechanisms within the head restraint and backrest assembly, thus achieving a clean external appearance while maintaining functional complexity internally.
2Ease of manufacture
If the transverse strut is made hollow to conduct lines, then the ease of manufacture is improved, but the structural strength may be reduced
Solution Approach 1:
The transverse strut serves multiple functions: it provides structural support for the head restraint, acts as a guide for the control cable, and serves as a housing for routing lines into the head restraint interior. By consolidating these functions into a single component, the design simplifies manufacturing while maintaining structural integrity through optimized strut geometry.
3Shape
If the guide device and guide rods are concealed from outside, then the aesthetic appearance is improved, but the ease of operation for maintenance increases
Solution Approach 1:
The head restraint is designed as a modular assembly with the guide device, guide rods, and control cable access points positioned at discrete locations. The control cable enters through the transverse strut and connects to the head restraint at identifiable attachment points, allowing maintenance personnel to access and service individual components by disassembling specific sections rather than the entire assembly.
Data Source
AI summary
A backrest of a motor vehicle seat (1) has a head restraint (4) that can be adjusted in height with the aid of a guide. To reduce the production costs of the backrest, the guide for the height adjustment of the head restraint (4) is integrated in the head restraint (4).