Collapsible Wheeled Stool with Nested U-Shaped Seating Segments
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Solution Overview
Problem
Traditional wheeled chairs and stools are heavy, cumbersome, and poorly suited for use in tight spaces, lacking adjustability and ergonomics, making them difficult to transport and store, while collapsible options often compromise on comfort and stability for ease of use.
Innovation Solution
A lightweight, collapsible chair with a sturdy, foldable seating surface, extendable lumbar support, and collapsible legs with wheels, designed for comfort, stability, and ease of transport and storage, featuring a seat base with intersecting structural ribs, telescoping height adjustment, and a multi-positionable lumbar support assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional wheeled chairs and stools are used, then stability and comfort are improved, but weight and ease of transport deteriorate
Solution Approach 1:
The chair is divided into multiple collapsible leg portions that can be separated into individual segments. Each leg portion can be independently collapsed and nested within the seat structure, allowing the chair to be disassembled into compact components for easy transport while maintaining full stability when assembled.
2Ease of operation
If traditional wheeled chairs and stools are used, then comfort and ergonomics are improved, but ease of storage deteriorates
Solution Approach 1:
The collapsible leg portions are designed to nest within the seat structure when collapsed, similar to nested dolls. The legs fold into compact positions that fit inside or alongside the seat base, creating a space-efficient package that maintains full ergonomic functionality when deployed.
3Weight of moving object
If collapsible stools with telescoping components are used, then ease of transport is improved, but strength and stability deteriorate
Solution Approach 1:
The chair transitions from a static fixed structure to a dynamic collapsible structure. The leg portions incorporate movable joints and telescoping mechanisms that allow the chair to adapt between two stable states: fully assembled for use and collapsed for transport. This dynamic design maintains structural integrity in both configurations.
4Volume of moving object
If collapsible chairs are used, then ease of storage is improved, but ergonomics and comfort deteriorate
Solution Approach 1:
The ergonomic features such as lumbar support and seat cushioning are segmented into separate components that can be independently folded or removed. The lumbar support assembly includes collapsible elements that maintain their supportive function when extended but compact into small packages when collapsed, preserving ergonomics during use while minimizing storage volume.
Data Source
AI summary
The invention relates generally to a lightweight, collapsible, and portable wheeled seat, e.g., a wheeled office chair or stool, for travel, storage, and mobility. The seat includes a seat base member and a seat surface member collapsible between an open, extended position, which is configured to provide a seating surface, and a collapsed, closed position. The seat surface member includes a central seating surface member fixed to the seat base member that has an outer perimeter, and a pair of oppositely disposed and generally u-shaped seating surface members pivotally secured to the seat base member. Each of the generally u-shaped seating surface members include a pair of leg portions that extend from a base portion thereof, or an inward directed perimeter and a portion of each inward directed perimeter has a shape that substantially complementarily corresponds to a shape of a portion of the outer perimeter of the central seating surface member.