Stackable Ergonomic Chair With Flexible Lumbar and Pressure-Relief Seat
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Solution Overview
Problem
Affordable and stackable chairs often lack proper lumbar support and comfort due to design priorities focused on affordability and ease of storage over user comfort, leading to uncomfortable seating experiences.
Innovation Solution
The ergonomic chair design features a support system with flexible seat and backrest extensions, lumbar mounts, and elastic lumbar support, along with pressure-reducing slots and a spring mechanism to distribute weight evenly and maintain lumbar support during reclining, incorporating a flexible seat and backrest with adjustable features for improved comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If chairs are designed with large apertures in the center of the seat to accommodate stacking, then ease of storage is improved, but user comfort deteriorates
Solution Approach 1:
The seat is divided into multiple independent flexing extensions separated by slots, allowing each segment to move independently for comfort while maintaining overall structural integrity for stacking
Solution Approach 2:
The seat is designed as a flexible shell with slots that allow it to bend and conform to user body shape, providing comfort while maintaining the ability to stack when not in use
2Strength
If rigid seats are used to resist bending and torsional strains, then structural strength is improved, but user comfort deteriorates
Solution Approach 1:
The seat is segmented into multiple flexing extensions connected by slots, allowing controlled bending in specific areas while maintaining overall structural strength through the distributed design
Solution Approach 2:
The seat transitions from a static rigid structure to a dynamic flexible structure with slots that allow bending and torsional movement, adapting to user position while maintaining strength
3Ease of manufacture
If the backrest pivots at the base connection with the seat, then ease of manufacture is improved, but lumbar support deteriorates
Solution Approach 1:
The lumbar support function is extracted from the base connection and implemented as a separate adjustable lumbar mount that can be positioned independently to provide proper lumbar support
Solution Approach 2:
A lumbar mount acts as an intermediary component between the seat and backrest, providing the necessary support at the correct position while allowing the backrest to pivot at the base
4Ease of manufacture
If affordable materials and simple design are used, then manufacturing cost is reduced, but user comfort deteriorates
Solution Approach 1:
The seat is segmented into multiple extensions with slots, providing comfort through flexibility while using simple, affordable materials and manufacturing processes
Solution Approach 2:
The design changes physical parameters such as adding slots and dividing the seat structure to achieve flexibility and comfort without requiring expensive materials or complex manufacturing
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The ergonomic chair provides enhanced comfort by evenly distributing weight, reducing pressure points, and maintaining lumbar support even in a reclined position, addressing the shortcomings of traditional stackable chairs by prioritizing user comfort through innovative design elements.
Implementation Method 1
the lumbar support means comprises a band of elastic material (e.g., elastomer, textile, or the like)
Implementation Method 2
The two flexing seat extensions preferably are able to move in relation to one another
Implementation Method 3
a left side connector attached to the left side lumbar mount and pivotally attached to the left side of the backrest
Data Source
AI summary
An ergonomic chair having a seat with selectively located slot patterns or spring mechanisms to reduce pressure on the occupant of the seat and a flexible back that allows the occupant to recline while at the same time providing lumbar support. An embodiment of the chair may be telescopically stacked in a space-saving configuration of a plurality of identical chairs.