Adjustable Folding Chair Frame for Uneven Ground Stability
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Solution Overview
Problem
Conventional folding chairs are unstable on uneven surfaces, prone to rocking and tipping, and often lack sufficient support and ease of deployment or collapsibility.
Innovation Solution
A folding chair with independently adjustable front and rear leg assemblies, featuring a lightweight aluminum frame, ball and socket joints, and a central hub for easy deployment and adjustment, along with weatherproof fabric and cup holders, allowing secure use on uneven surfaces and easy folding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional folding chairs are used on uneven surfaces, then portability and ease of setup are maintained, but stability and security deteriorate causing rocking and tipping
Solution Approach 1:
The chair legs are divided into adjustable segments that can be independently positioned. Each leg assembly includes multiple segments that can be reconfigured to accommodate uneven surfaces, allowing the chair to maintain stability while preserving portability and ease of setup.
Solution Approach 2:
The leg assemblies incorporate dynamic adjustment mechanisms that allow the legs to be repositioned during setup. This dynamic capability enables the chair to adapt to uneven surfaces by adjusting leg positions, while still maintaining quick setup and portability characteristics.
2Reliability
If adjustable leg assemblies are added to provide support on uneven surfaces, then stability improves, but device complexity increases
Solution Approach 1:
The adjustment mechanism is segmented into discrete, simple components that can be easily manipulated. Each leg assembly is divided into manageable segments with simple connection points, reducing overall complexity while providing the necessary adjustment capability for stability.
Solution Approach 2:
The leg adjustment mechanism is designed to be self-servicing through intuitive design features such as self-locking connections and gravity-assisted positioning. This reduces the complexity of control systems while maintaining reliable support and security on uneven surfaces.
3Adaptability or versatility
If extensive manipulation is required for leg adjustment, then adaptability to uneven surfaces improves, but ease of operation deteriorates
Solution Approach 1:
The leg assemblies incorporate dynamic adjustment features that allow for quick repositioning during deployment. The mechanisms enable users to adapt the chair to uneven surfaces through simple, intuitive movements rather than extensive manipulation, maintaining ease of operation while improving adaptability.
Solution Approach 2:
The adjustment system allows for rapid parameter changes in leg position and angle through simplified mechanisms. This enables the chair to adapt to various uneven surface conditions while requiring minimal manipulation, preserving ease of deployment.
Data Source
AI summary
A folding chair provides for leveling seating upon uneven ground. The chair includes folding chair frame with a pair of front leg assemblies and a pair of rear leg assemblies, each pivotally attached to a central hub. Each leg assembly has downwardly extending tubular portions and a means for securing the portions at a desired height. The adjustable legs provide a means for a level seating upon ground surfaces of varying elevations. The chair further utilizes inflatable arm rest, seat rest and back rest portions in one (1) embodiment.