Integrated Back Plate Cell for Simultaneous Chair Adjustment
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Solution Overview
Problem
Conventional chairs lack a simple and effective mechanism for simultaneously adjusting the positions of armrests and back plates, making it difficult for users, especially children and youths, to achieve optimal posture and comfort due to fixed or complicated structures.
Innovation Solution
A chair with an integrated back plate cell that includes a backrest portion and armrest portions, a lower frame with seat and armrest support portions, and a fixing lever system allowing oblique movement, enabling simultaneous adjustment of the backrest and armrest positions through a compact and user-friendly mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional chairs use fixed or separate adjustment mechanisms for armrests and back plates, then the structure remains simple, but the ability to simultaneously adjust both components for optimal user posture is lost
Solution Approach 1:
The patent combines the back plate and armrest into a single integrated back plate cell assembly that moves together as one unit. The fixing lever mechanism simultaneously controls both the back plate position and armrest position, merging two separate adjustment functions into a single coordinated system. This allows simultaneous adjustment of both components while maintaining relatively simple mechanism structure.
Solution Approach 2:
The fixing lever serves multiple functions: it simultaneously adjusts the back plate angle, positions the armrest, and locks both in place. The lever mechanism is designed to control multiple degrees of freedom (back plate rotation and armrest positioning) through a single operational element, providing multi-functionality that enables coordinated adjustment without requiring separate mechanisms for each component.
2Ease of operation
If conventional chairs require trial and error adjustment of back plate and armrest positions, then the structure remains simple, but the time and effort required for proper adjustment increases
Solution Approach 1:
The patent implements a dynamic adjustment mechanism where the fixing lever can easily transition between locked and unlocked states. When unlocked, the integrated back plate cell assembly can be freely positioned; when locked, it holds the position firmly. This dynamic characteristic allows users to quickly adjust both back plate and armrest positions without complex procedures or significant time investment.
Solution Approach 2:
The fixing lever mechanism is designed to be user-operable without requiring tools or assistance from others. Users can independently adjust the back plate and armrest positions by simply manipulating the lever, and the mechanism provides visual or tactile feedback to confirm proper positioning and locking. This self-service capability eliminates the need for trial and error with complex mechanisms or assistance from others.
3Adaptability or versatility
If children and youths need simultaneous adjustment of back plate front-rear position and armrest up-down position, then user comfort is improved, but the adjustment mechanism becomes more complex
Solution Approach 1:
The patent merges the back plate and armrest into an integrated assembly that moves together, ensuring coordinated adjustment suitable for growing children and youths. The single fixing lever controls both components simultaneously, allowing the back plate to move front-to-rear while the armrest adjusts up-and-down in a coordinated manner. This merging approach provides growth adaptability without requiring complex independent control mechanisms for each component.
Data Source
AI summary
A chair capable of allowing positions of armrests and a back plate to be simultaneously adjusted having an integrated back plate cell including a backrest portion and armrest portions extending forward from the backrest portion, a lower frame including a seat plat support portion and an armrest support portion which extends upward from the seat plat support portion and is coupled to each of the armrest portions, and a fixing lever which fixes the armrest portion to the armrest support portion, wherein the integrated back plate cell is obliquely movable relative to the lower frame.