Collapsible Chair Back Support for Neutral Spine Posture

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Solution Overview

Problem

Conventional collapsible chairs lack sufficient back support, leading to an unhealthy 'C-sitting' position that can cause discomfort and long-term spinal issues due to the sagging curve of the seat material, which does not align with the natural curvature of the spine.

Innovation Solution

A collapsible chair design featuring a collapsible back with arcuate support members and a back membrane that spans between them, providing a curved support matching the lumbar region of the spine, and a seat that is tilted to prevent forward slouching, ensuring the spine remains in a neutral, healthy position.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If conventional collapsible chairs use simple seat membranes without back support, then the chair structure remains simple and portable, but the back support is insufficient causing C-sitting position and spinal stress

Engineering Contradiction:

ImproveportabilityVSAvoidspinal stress

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The back support is segmented into multiple arcuate support members (first back support member, second back support member) that can be independently positioned and adjusted, allowing the structure to provide lumbar support while remaining collapsible for portability

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The back support members are designed to be adjustable and reconfigurable, allowing users to modify the support configuration based on their needs, while the entire assembly can be collapsed when not in use to maintain portability

Inventive Principle:

Principle #15Dynamics

2Ease of operation

If the seat membrane sags to allow flexibility and comfort, then the seat is more comfortable for brief use, but it forces the lumbar region to curve into an unhealthy C-sitting position during extended sitting

Engineering Contradiction:

Improveseat flexibilityVSAvoidlumbar curvature

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The back support members feature arcuate (curved) designs that match the natural lumbar curvature of the spine, providing ergonomic support that counteracts the C-sitting position while allowing the seat membrane to remain flexible for comfort

Inventive Principle:

Principle #14Spheroidality (Curvature)

3Weight of stationary object

If conventional chairs lack back support members, then the chair structure remains simple and lightweight, but they cannot provide adequate support for the natural curve of the spine

Engineering Contradiction:

Improvechair weightVSAvoidspinal alignment

Core Design Contradiction:

Weight of stationary objectVSObject-affected harmful factors

Solution Approach 1:

The back support members are constructed as thin, flexible arcuate elements that can be collapsed into a compact form for portability, yet provide sufficient structural support to maintain spinal alignment when deployed

Inventive Principle:

Principle #30Flexible shells and thin films

Data Source

PatentUS9622582B2Collapsible chair with collapsible back support

Publication Date: 2017.04.18 STRONGBACK

AI summary

A collapsible chair includes a collapsible seat having a front portion and an opposing rear portion and a collapsible back. The collapsible back includes a first back support member and a second back support member. Each of the first back support member and the second back support member includes an arcuate portion extending toward the front portion of the collapsible seat. A back membrane is coupled to the back support members and spans a distance between the back support members.