Functional legless chair

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional legless chairs lack effective support for the waist and back, leading to discomfort, poor heat dissipation, and air circulation, and are prone to shaking and shrinkage issues during injection molding, with limited cushion attachment and detachment functionality.

Innovation Solution

A legless chair design featuring a first support for the waist, a second support for the buttocks and thighs, and a connection support linking both, with a heating function, improved air circulation channels, and detachable cushions, using elastic materials and injection molding to distribute body pressure and prevent shaking.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the chair uses a simple integrated structure, then manufacturing is easier and cost is lower, but body pressure is not distributed effectively and comfort is reduced

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidbody pressure distribution

Core Design Contradiction:

Ease of manufactureVSProductivity

Solution Approach 1:

The chair is divided into multiple functional segments: a first support part for the waist area, a second support part for the buttocks area, and a connection support part linking them. This segmentation allows each part to independently support different body regions, effectively distributing body pressure while maintaining an integrated molded structure for ease of manufacturing.

Inventive Principle:

Principle #1Segmentation

2Strength

If the chair uses a solid structure, then strength is improved, but heat dissipation and air circulation are hindered

Engineering Contradiction:

Improvestructural strengthVSAvoidheat dissipation

Core Design Contradiction:

StrengthVSTemperature

Solution Approach 1:

The chair incorporates a ventilation hole formed through the connection support part, creating a porous structure that allows air circulation. This ventilation hole passes through the entire connection support part from one surface to the opposite surface, enabling effective heat dissipation and air flow while maintaining the overall structural strength of the molded chair.

Inventive Principle:

Principle #31Porous materials

3Ease of manufacture

If the chair lacks a heating function, then manufacturing is simpler, but comfort in cold environments is reduced

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidseasonal adaptability

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The chair is designed with multi-functionality to adapt to different seasonal needs. It provides ventilation and cooling through the ventilation hole during warm weather, and can accommodate heating elements or insulated cushions during cold weather, making it suitable for year-round use while maintaining relatively simple manufacturing processes.

Inventive Principle:

Principle #6Universality (Multi-functionality)

4Stability of the object's composition

If the cushion is permanently attached, then structural integrity is maintained, but ease of cleaning and replacement is reduced

Engineering Contradiction:

Improvestructural integrityVSAvoidcushion removal

Core Design Contradiction:

Stability of the object's compositionVSEase of repair

Solution Approach 1:

The cushion is designed with dynamic attachment and detachment capabilities. It can be easily attached to and removed from the chair body, allowing for cleaning, replacement, or adjustment as needed. This dynamic design maintains structural integrity when attached while providing ease of maintenance when detached.

Inventive Principle:

Principle #15Dynamics

5Strength

If angled ribs are used for reinforcement, then connection strength is improved, but shrinkage during injection molding increases

Engineering Contradiction:

Improveconnection strengthVSAvoiddimensional stability

Core Design Contradiction:

StrengthVSManufacturing precision

Solution Approach 1:

Instead of using angled ribs that cause shrinkage during injection molding, the connection support part employs a curved surface design that smoothly connects the first and second support parts. This curved surface provides structural reinforcement and connection strength while being compatible with injection molding processes, preventing the shrinkage and dimensional instability associated with angled rib structures.

Inventive Principle:

Principle #14Spheroidality (Curvature)

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 design enhances user comfort through improved heat dissipation and air circulation, prevents side-to-side movement, optimizes body pressure distribution, facilitates cushion attachment and detachment, and reduces shrinkage during injection molding.

Implementation Method 1

a heating part for heating at least a portion of the second support part

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Implementation Method 2

improved air circulation channels

Methodology Applied

Scientific EffectConvection: Convection

Data Source

PatentUS11583086B2Functional legless chair

Publication Date: 2023.02.21 ABLUE CO LTD

AI summary

A functional sitting chair according to an embodiment of the present disclosure effectively distributes the user's body pressure even when the user sits for a long time, stably supports the user's waist and back, provides a heating function, and maintains great comfort by effectively circulating air through a pattern formed on the cushion.