Adjustable-Leg Folding Chair for Bleachers and Uneven Seating
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Solution Overview
Problem
Existing portable, foldable chairs are not suitable for bleacher, concrete stadium, slope, flat surface, or uneven surface seating, requiring separate and expensive chairs for each type of seating arrangement.
Innovation Solution
A portable, folding chair design featuring pivotally connected front and rear leg supports with individually adjustable legs and foldable leg braces, allowing for versatile seating on various surfaces by adjusting leg lengths and positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a portable foldable chair is designed for a specific seating type (e.g., flat surface), then it provides stable and comfortable seating for that specific type, but it cannot be used for other types of seating (e.g., bleachers, concrete stadium seats, slopes, uneven surfaces)
Solution Approach 1:
The chair is divided into separate adjustable components: front legs, rear legs, and leg braces that can be independently positioned. Each leg assembly can be adjusted separately to accommodate different seating surfaces, allowing the chair to segment its structure to fit various ground conditions and bench types.
Solution Approach 2:
The chair incorporates dynamic adjustment capabilities through movable leg assemblies with multiple position options. The front and rear legs can be positioned at different heights and angles, and the leg braces can be adjusted to change the chair's geometry, enabling adaptation from flat surfaces to bleachers to uneven terrain.
2Adaptability or versatility
If multiple specialized chairs are purchased for different seating types, then each chair is optimized for its specific purpose, but the total cost and number of chairs required increases significantly
Solution Approach 1:
The chair is designed as a universal multi-functional device that can serve multiple seating purposes. By incorporating adjustable leg assemblies and bracing mechanisms, a single chair design can function on flat surfaces, bleachers, concrete stadium seats, slopes, and uneven surfaces, replacing the need for multiple specialized chairs.
3Adaptability or versatility
If the chair structure is made more complex to accommodate various seating types, then versatility improves, but the ease of folding and portability may be compromised
Solution Approach 1:
The chair's segmented design with modular leg assemblies and independent adjustment mechanisms allows each component to be simplified and standardized. This segmentation enables easy folding and assembly while maintaining versatility, as each segment can be independently adjusted or stowed.
Solution Approach 2:
The chair utilizes parameter changes through adjustable leg lengths, angles, and brace positions. These parameters can be modified to suit different seating conditions, and the adjustment mechanisms are designed to be simple and quick, maintaining ease of operation despite the increased adaptability.
Data Source
AI summary
A portable, folding chair. Two front leg supports are pivotally connected to a seat frame and extend downward from the seat frame. Two rear leg supports are also pivotally connected to the seat frame. A majority of the length of each rear leg support is positioned above the seat frame. Two individually adjustable front legs extend downward from the front leg supports and two individually adjustable rear legs extend downward from the rear leg support. A front foldable leg brace is connected between the two front leg supports and a rear foldable leg brace is connected between the two rear leg supports. In preferred embodiments, the chair may be utilized in a variety of seating arrangements, such as: bleacher seating, concrete stadium seating, slope seating, flat surface seating and uneven surface seating.