Headrest Box Synchronization for Tilt-Free X-Direction Adjustment
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Solution Overview
Problem
Existing headrests lack a simple and reliable mechanism for adjustment in the X direction without tilting, which is essential for comfort and safety.
Innovation Solution
A headrest with a headrest box mounted on holding rods, featuring synchronization means such as belts or interlocking/frictional elements that ensure torsion-free adjustment in the X direction, allowing for precise positioning without tilting, utilizing belts or interlocking/frictional means like toothed belts and circular segments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a headrest box is mounted on holding rods to enable adjustment in the X direction, then the headrest can be adjusted toward and away from the head of the seat occupant for comfort and safety, but the headrest box may tilt during adjustment instead of moving purely in the X direction
Solution Approach 1:
The patent introduces a synchronization means as an intermediary mechanism between the headrest box and the holding rods. This synchronization means comprises synchronization elements (belts) that wrap around synchronization bodies (rod-like elements) to couple the movement of the headrest box with the rotation of the holding rods, ensuring that adjustment forces are distributed evenly and preventing tilting during X-direction movement
2Adaptability or versatility
If the headrest box is made adjustable in the X direction using conventional mechanisms, then positioning flexibility is improved, but the mechanism becomes complex and unreliable
Solution Approach 1:
The holding rods serve multiple functions: they provide the structural support for mounting the headrest box, act as the adjustment mechanism for X-direction movement, and function as the synchronization bodies that the belts wrap around to prevent tilting. This multi-functionality eliminates the need for separate synchronization mechanisms, reducing overall device complexity while maintaining positioning flexibility
Solution Approach 2:
The patent uses flexible belts as the synchronization elements. These thin, flexible elements wrap around the rod-like synchronization bodies to transmit motion and enforce synchronized movement. The flexibility of the belts allows them to conform to the cylindrical shape of the rods while maintaining tension and synchronization, providing a simple yet effective solution without complex mechanical linkages
3Stability of the object's composition
If synchronization means with belts are used to prevent tilting during X-direction adjustment, then movement synchronization is improved, but the structure becomes more complex
Solution Approach 1:
The patent merges the synchronization function with the existing holding rod structure. The holding rods are designed to serve both as structural supports and as the rod-like elements that the belts wrap around. By combining these functions into a single structural element, the patent achieves synchronized movement without adding separate synchronization mechanisms, thereby minimizing structural complexity
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
Enables simple and reliable adjustment of the headrest box in the X direction, ensuring comfort and safety by preventing tilting and allowing locking in desired positions, with belts providing synchronized movement in both X and Z directions.
Implementation Method 1
The belts interact frictionally with a base element
Implementation Method 2
the belt has interlocking and/or frictional means... the belt interacts in an interlocking and/or frictional manner with a rotary body
Data Source
AI summary
The present invention relates to a headrest having a headrest box which is mounted on at least one retaining rod and can be displaced in the X direction.