Headrest Folding Mechanism with Nested Stay Rod
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Solution Overview
Problem
Existing headrest folding devices are complex, occupy large space, and have reduced durability due to a large separation distance between components and inadequate support, leading to instability and increased component count.
Innovation Solution
A headrest folding device with a simplified structure featuring a housing with rotatable links and a sliding stay rod within a lifting member, driven by a motor, which allows for compact design and even support distribution, enhancing durability and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the separation distance between the rotating member and the mounting portion is increased to increase the folding angle, then the folding angle is improved, but the space occupied by the device becomes large
Solution Approach 1:
The stay rod is slidingly installed within the lifting member, creating a nested configuration where one component is placed inside another. This nesting approach allows the mechanism to achieve a large folding angle while maintaining a compact overall structure, as the components occupy overlapping spatial volumes rather than requiring separate spaces.
Solution Approach 2:
The invention transitions from a conventional configuration where components are arranged in separate spatial locations to a nested arrangement where components occupy the same spatial envelope. This dimensional reorganization allows the mechanism to achieve extended range of motion without increasing the external dimensions of the device.
2Ease of operation
If the conventional structure with rotating member and mounting portion is used, then the headrest can be moved, but the structure becomes complicated and requires more number of components
Solution Approach 1:
The invention merges the functions of the rotating member and mounting portion into an integrated mechanism where the stay rod is slidingly connected to the lifting member. This consolidation eliminates the need for separate rotating members and mounting portions, reducing the total component count while maintaining the headrest movement capability.
Solution Approach 2:
The lifting member serves multiple functions: it provides the lifting motion, accommodates the sliding stay rod, and replaces the conventional rotating member and mounting portion. This multi-functional design reduces component complexity while maintaining operational capability.
3Device complexity
If the headrest is supported only at both sides, then the structure is simple, but the durability is degraded
Solution Approach 1:
The support structure is segmented into multiple load-bearing elements: the lifting member and the stay rod. This segmentation allows the supporting force to be distributed across multiple components rather than concentrated at single side support points, enhancing durability while maintaining structural simplicity.
Solution Approach 2:
The invention enhances the local quality of the support structure by introducing the sliding connection between the stay rod and lifting member. This localized structural enhancement provides additional support and force distribution at critical points, improving overall durability without significantly increasing overall 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
The solution results in a compact, stable, and durable headrest folding mechanism with reduced component count, improved assembly ease, and enhanced support for the headrest, minimizing noise and vibration transmission.
Implementation Method 1
A screw rotatably installed in the housing and driven by a motor may further be included, wherein the screw may be screw-coupled to the lifting member
Implementation Method 2
A screw rotatably installed in the housing and driven by a motor
Implementation Method 3
a pair of links rotatably installed in the housing
Implementation Method 4
the stay rod is slidingly installed in the lifting member
Data Source
AI summary
The present invention relates to a headrest folding device, more particularly, to a headrest folding device comprising a housing, a link rotatably installed in the housing, and a lifting member installed in the housing in a way that it can be lifted or lowered, wherein a stay rod is connected to the link, and wherein the stay rod is slidingly installed in the lifting member, so that the structure becomes significantly simplified, the device becomes compact, and the headrest is stably folded.