Portable Chair Sliding Pivot for Stable Reclining Comfort
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Solution Overview
Problem
Portable chairs often lack comfort, durability, and adjustability, leading to low user satisfaction and high replacement frequencies, especially in outdoor settings where seating is not consistently available.
Innovation Solution
A portable chair design featuring a seat and back frame with adjustable reclining capabilities, secured by a sliding pivot mechanism and fabric retention members, allowing for easy conversion between upright and reclined positions, and a collapsible structure for transport.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the chair structure is made rigid and stable for durability, then reliability improves, but weight and portability worsen
Solution Approach 1:
The chair is divided into multiple modular components including collapsible legs, adjustable backrest sections, and separable armrests. Each component can be independently folded or adjusted, allowing the chair to maintain structural integrity when assembled while being lightweight and easy to disassemble for transport.
Solution Approach 2:
The chair incorporates dynamic elements such as adjustable backrest angles, collapsible leg mechanisms, and movable armrests. These dynamic features allow the chair to adapt its structure for stability during use while enabling compact folding for portability, resolving the contradiction between rigid durability and lightweight portability.
2Reliability
If the chair provides fixed seating position for stability, then reliability improves, but adaptability worsens
Solution Approach 1:
The backrest is designed with adjustable positioning mechanisms that allow it to be set at multiple fixed angles. This provides stable seating positions for different activities (reading, dining, relaxing) while maintaining reliability through defined locking positions, thus achieving both stability and adaptability.
Solution Approach 2:
The chair allows adjustment of key geometric parameters including backrest angle, seat height, and armrest position. By changing these parameters, the chair adapts to different user needs and activities while maintaining structural stability through controlled adjustment mechanisms with defined stopping positions.
3Ease of operation
If the chair is designed for comfort with cushions and supports, then user satisfaction improves, but weight and portability worsen
Solution Approach 1:
The chair uses thin, flexible fabric materials for upholstery and cushioning instead of heavy foam or rigid structures. These flexible materials provide comfort through softness and conformability while adding minimal weight, and they can be easily removed or folded for portability.
Solution Approach 2:
The chair incorporates adjustable supports and positioning mechanisms that allow users to customize comfort levels without adding permanent heavy structures. Dynamic adjustment capabilities enable comfort optimization for different body types and activities while maintaining lightweight construction.
4Adaptability or versatility
If the chair includes multiple adjustment mechanisms for versatility, then adaptability improves, but device complexity worsens
Solution Approach 1:
The adjustment mechanisms are segmented into independent, simple subsystems (backrest angle adjustment, armrest height adjustment, leg angle adjustment) rather than one complex integrated system. Each subsystem handles a specific adjustment function with its own simple mechanism, making the overall system more versatile yet easier to understand and maintain.
Solution Approach 2:
The adjustment mechanisms are designed to be user-operated without requiring tools or complex procedures. Simple levers, buttons, or manual releases allow users to adjust the chair configuration independently, reducing the need for complex control systems while maintaining high adaptability.
Data Source
AI summary
A portable chair may include a first front leg and a second front leg connected by a front sled and a first back leg and a second back leg connected by a back sled. The first front leg and the first back leg may be pivotally connected to a sliding pivot on an armrest, where the sliding pivot moves relative to the armrest to adjust the chair from an upright position to a reclined position. The seat assembly may include a fabric member that is attached secured to a seat frame by a plurality of fabric retention members. In some examples, the portable chair may include a fabric member is releasably connected to the seat frame and back frame and also extends from a forward rail of the seat frame to a top rail of the back frame.