Adaptive Work Chair Back Structure for Dynamic Posture Flexing
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Solution Overview
Problem
Current chairs fail to effectively adapt to dynamic body postures, leading to static posture-related health issues such as fatigue and musculoskeletal injuries, as they lack sufficient flexibility and do not encourage active movements during long-duration sitting.
Innovation Solution
A chair design featuring a cantilevered seat and back frame with spine members made of glass-filled Poly-Amide, allowing multi-dimensional movement through a simple lean, and an adjustable tilt limiter for varying back tilt positions, enabling intuitive posture changes and dynamic movements without complex adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the back is connected with the seat towards its central axis enabling multiple axes flexing only through a short distance from central pivot point, then the chair provides some posture flexibility, but the flexing capability is limited and does not effectively support dynamic body movements
Solution Approach 1:
The back frame is divided into multiple independent flexing sections (first, second, and third flexing sections) that can move relative to each other. This segmentation allows each section to contribute to the overall flexing distance, enabling much greater range of motion compared to a single pivot-point system.
Solution Approach 2:
The patent introduces multi-dimensional movement by allowing the back frame to flex not only forward and backward but also laterally and diagonally. The combination of multiple flexing sections connected at different points creates a three-dimensional flexing capability that accommodates dynamic body movements in various directions.
2Productivity
If static seated postures are maintained for long hours, then work productivity is improved, but musculo-skeletal injuries and pain occur
Solution Approach 1:
The chair encourages periodic posture changes through its multi-dimensional flexing capability. Users naturally transition between different seated positions, leaning forward, backward, and sideways, which creates periodic movement that prevents musculo-skeletal injuries while maintaining work focus.
Solution Approach 2:
The dynamic back frame system allows users to easily transition between static and dynamic postures. The chair supports both focused working positions and active movement, enabling users to maintain productivity while periodically changing positions to prevent injuries.
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 chair supports efficient posture changes and minimizes static posture risks by allowing 3D movement and adjustable tilt, promoting user activity and focus, thus reducing fatigue and musculoskeletal issues.
Implementation Method 1
spine members made of glass-filled Poly-Amide, allowing multi-dimensional movement through a simple lean
Data Source
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AI summary
The present subject matter relates to a work chair which adapts to dynamic body postures of a user. The posture adaptive work chair comprising a seat sub-assembly (102) having a front edge (138) and a seat base sub-assembly (124); a pair of a spine members (106) cantilevered from the font edge (138) of the seat sub-assembly (102); a back sub-assembly (104) supported by the pair of spine members (106), the back sub-assembly (104) is configured to flex in multiple axes based on direction of load applied by a user; and a tilt limit lever (120) movably coupled to the seat base sub-assembly (124); said tilt limit lever (120) being configured to enable tilting of the back-sub assembly (104) to a plurality of tilt positions ( 132, 132', 132").