Chair Armrest Height Adjustment With End-Press Lock Release
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Solution Overview
Problem
Conventional office chairs lack adjustable height and angle features in their armrests, making it difficult for users to find a comfortable position, as existing solutions are either inconvenient to adjust or restrict height adjustments.
Innovation Solution
An adjusting structure for the armrest comprising a first body with a fitting tube, a vertically moving mechanism, a retaining mechanism, a support element, and a resilient element, allowing easy upward or downward movement by pressing a member to adjust the armrest's height.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the armrest is integrally injection formed from plastic materials or made of metal with connected plastic armrest, then the structural strength is improved, but the adjustability of height and angle is lost
Solution Approach 1:
The armrest system is divided into separate components: a fixed base portion and a movable armrest portion that can be adjusted independently. The base includes a fitting tube while the armrest includes a vertically moving mechanism with second body, allowing height adjustment while maintaining structural integrity of each component.
Solution Approach 2:
The armrest transitions from a static integrated structure to a dynamic adjustable structure. The vertically moving mechanism enables the armrest to move upward and downward along the fitting tube, providing height adjustability while the retaining mechanism ensures stable positioning at desired heights.
2Adaptability or versatility
If locking bolts are fixed on the middle position of the armrest carrier, then the height adjustment function is provided, but the ease of operation deteriorates
Solution Approach 1:
The adjustment function is extracted from the middle position of the armrest carrier and relocated to the end portion of the armrest. The pressing member is positioned at the end where the user's hand naturally rests, making the adjustment mechanism more accessible and easier to operate without requiring the user to reach for bolts in the middle.
Solution Approach 2:
The pressing member is designed to be operated by the user's hand weight alone when placed on the armrest. The resilient element provides automatic engagement and disengagement of the locking mechanism, allowing the armrest height to be adjusted simply by the user's natural movement without requiring manual manipulation of separate adjustment controls.
3Ease of operation
If a pressing member is added to enable easy height adjustment, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The pressing member is integrated into the armrest structure itself rather than being a separate control mechanism. The pressing member, resilient element, and locking mechanism are combined into a unified assembly where the armrest end portion serves both as the user interface and the adjustment mechanism, reducing overall system complexity while maintaining ease of operation.
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 easy height adjustment of the armrest by compressing a resilient element, allowing users to set the armrest to a comfortable height, enhancing user convenience and comfort.
Implementation Method 1
a resilient element secured in the support element and one end thereof being biased against an inner side of the support element, and another end of the resilient element abutting against the pressing member and the control end of the controlling member
Data Source
AI summary
An adjusting structure of an armrest of a chair contains a first body having a bottom plate and a fitting tube; a vertically moving mechanism inserted in the fitting tube and including a second body, an actuating member, a controlling member, and a lip; a retaining mechanism including an engaging member and locking panel inserted in the through hole of the second body; a support element fitted onto the fitting tube and including a cutout to receive a pressing member; a resilient element secured in the support element and one end thereof being biased against an inner side of the support element, and another end of the resilient element abutting against the pressing member and the control end of the controlling member, the pressing member being used to compress the resilient element.