Chair

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Solution Overview

Problem

Current chair production technologies face challenges with stability, cost, and storage/transportation issues due to the need for multiple transverse connection bars, leading to economic and management inefficiencies, as well as potential damage during stacking.

Innovation Solution

A chair design featuring two facing sidepieces connected by bar-type connection means, allowing for stable assembly and disassembly, with engagement/disengagement mechanisms for the backrest and seat, and protective covering elements to prevent damage during storage and transport.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If multiple transverse connection bars are used to firmly join the sides for stability, then the chair stability is improved, but the device complexity and manufacturing cost increase

Engineering Contradiction:

Improvechair stabilityVSAvoidconnection bars quantity

Core Design Contradiction:

Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The chair frame is divided into modular components: two independent sidepieces that can be separately manufactured and assembled. Each sidepiece contains integrated connection elements that eliminate the need for multiple separate transverse connection bars, reducing overall complexity while maintaining structural stability through the modular assembly approach.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The connection functionality is merged into the sidepieces themselves through integrated connection elements (such as welded or disassembled connection bars incorporated directly into the sidepiece structure). This eliminates the need for separate multiple transverse connection bars, reducing device complexity while maintaining the stability function.

Inventive Principle:

Principle #5Merging (Combining)

2Stability of the object's composition

If multiple transverse connection bars are used to firmly join the sides for stability, then the chair stability is improved, but the manufacturing cost increases

Engineering Contradiction:

Improvechair stabilityVSAvoidmanufacturing cost

Core Design Contradiction:

Stability of the object's compositionVSEase of manufacture

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Inventive Principle:

Principle #5Merging (Combining)

3Stability of the object's composition

If the chair is designed with closed polygon base for stability, then the chair stability is improved, but the storage and transport efficiency deteriorates

Engineering Contradiction:

Improvechair stabilityVSAvoidstorage volume

Core Design Contradiction:

Stability of the object's compositionVSVolume of moving object

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The chair design incorporates disassemblable connection means that allow the structure to transition from a stable assembled state during use to a compact disassembled state for storage and transport. The connection bar can be detached to reduce the volume occupied during stacking, while maintaining structural integrity when assembled.

Inventive Principle:

Principle #15Dynamics

4Productivity

If the chair is stacked for storage and transport, then the storage efficiency is improved, but damage to the frame and components occurs

Engineering Contradiction:

Improvestorage efficiencyVSAvoiddamage during stacking

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The design incorporates protective covering elements that are applied beforehand to vulnerable parts of the chair frame and components. These coverings protect the metal surfaces from scratches, dents, and other damage that may occur during stacking and handling in storage and transport conditions.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

Protective coverings in the form of flexible shells or thin film materials are applied to vulnerable surfaces of the chair frame, connection elements, and components. These coverings absorb impact and prevent direct contact between metal surfaces during stacking, eliminating damage while maintaining storage efficiency.

Inventive Principle:

Principle #30Flexible shells and thin films

Data Source

PatentUS11812864B2Chair

Publication Date: 2023.11.14 FORNASARIG LUCA

AI summary

A chair comprising two facing and cooperating sidepieces (11), bar-type connection means to correctly and stably distance the two sidepieces (11), and, during use, a backrest (13) and a seat (12); the bar-type connection means, the backrest (13) and the seat (12) connect the two sidepieces (11) transversely in a stable manner.