Armrest Adjustment Mechanism With Damped Multi-Directional Positioning
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Solution Overview
Problem
Existing armrest adjustment devices have complex structures and high production costs, making them difficult to assemble and manufacture, which hinders mass production and market competitiveness.
Innovation Solution
A simplified armrest adjustment device with a stable, smooth, and quiet movement mechanism that allows precise control of armrest position, featuring a damping part, press member, and positioning components for forward/backward and left/right movements, reducing the number of components and assembly complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional armrest adjustment mechanism with multiple components is used, then the armrest can be adjusted in different directions, but the structure becomes complicated and production cost increases
Solution Approach 1:
The patent combines the horizontal adjustment function and vertical adjustment function into a single integrated adjustment mechanism. The adjustment mechanism includes a movable plate that can move horizontally and a movable seat that can move vertically, with both functions sharing common components such as the damping part and pressing member. This merging of functions reduces the number of components and simplifies the overall structure while maintaining full adjustment capability in multiple directions.
Solution Approach 2:
The adjustment mechanism is designed with multi-functional components that perform multiple tasks. For example, the movable plate serves both as a horizontal adjustment element and as a support for the vertical adjustment mechanism. The damping part provides both horizontal damping and vertical damping functions. This multi-functionality allows the mechanism to achieve complex adjustment capabilities with fewer dedicated components.
2Measurement precision
If a conventional armrest adjustment mechanism with many components is used, then the armrest can be adjusted precisely, but the assembling becomes difficult and production cost is high
Solution Approach 1:
The adjustment mechanism is segmented into functional modules: a horizontal adjustment module with the movable plate, a vertical adjustment module with the movable seat, and shared components including the damping part and pressing member. This segmentation allows each module to be manufactured and tested independently, then assembled together, reducing overall assembly complexity while maintaining precise position control through the coordinated action of segmented components.
Solution Approach 2:
The mechanism incorporates self-positioning features where the movable plate and movable seat automatically align and lock into precise positions through their interaction with the damping part and pressing member. The damping part provides automatic resistance to movement, and the pressing member engages with positioning holes to automatically secure the armrest at desired positions, reducing the need for complex external positioning systems and simplifying assembly.
3Device complexity
If a simplified armrest adjustment device is used, then the production cost is reduced, but the movement stability and smoothness may be compromised
Solution Approach 1:
The damping part serves as an intermediary element between the movable plate and the pressing member, providing controlled resistance to horizontal movement. This intermediary component ensures smooth and stable horizontal adjustment while preventing direct rigid contact that would cause instability. The damping part mediates the interaction between the simple structural components, enabling reliable movement control without requiring complex mechanisms.
Solution Approach 2:
The mechanism uses the damping coefficient and pressing force as adjustable parameters to control movement characteristics. By optimizing the damping resistance and pressing member engagement force, the system achieves stable and smooth movement with a simplified structure. The parameter optimization allows the simple structure to deliver reliable performance by tuning the mechanical properties of existing components rather than adding 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 provides a stable, smooth, and quiet armrest adjustment with precise control, reducing production costs and improving market competitiveness by simplifying the structure and assembly process.
Implementation Method 1
a damping part (30) arranged between the movable plate (50) and the pressing member (40) for providing damping resistance to the horizontal movement of the movable plate (50)
Data Source
AI summary
An armrest adjustment device includes an armrest arranged at a top surface of an armrest support. The lower part of the armrest support is connected to a chair seat. The armrest can be adjusted to move forward and backward in relation to the chair seat. A first component is mounted in the armrest. The first component is assembled with and fixed on the armrest support so that the armrest can be moved forward and backward in relation to the first component. Moreover, a second component is arranged between the armrest and the armrest support. Instead of the first component, the second component is assembled with and fixed on the armrest support. Thus the armrest is moved in the left/right direction in relation to the second component.