chair
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing chairs with transverse connection bars for stability incur high production costs, transport inefficiencies, and storage damage risks, limiting stackability and increasing economic and management burdens.
Innovation Solution
A chair design featuring two facing sidepieces connected by a single bar-type connection means, with engagement/disengagement mechanisms for the seat and backrest, allowing disassembly and stable assembly, and a covering element to protect against damage during storage.
Engineering Contradictions & Design Principles
Engineering 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 production cost and device complexity increase
Solution Approach 1:
The connection function is segmented between the L-shaped connection element (providing transverse connection) and the adjustable foot elements (providing longitudinal connection and stability). This segmentation allows each component to be optimized for its specific function while reducing the total number of parts needed compared to traditional multi-bar designs.
Solution Approach 2:
The foot elements are designed to be adjustable in position along the sides, allowing the chair to adapt its stability configuration based on the surface conditions and stacking requirements. This dynamic adjustment capability replaces the need for multiple fixed connection bars.
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 production cost increases
Solution Approach 1:
The connection system is divided into modular components (L-shaped connection element, foot elements) that can be manufactured separately and assembled, reducing production complexity and cost compared to manufacturing multiple complete connection bars.
Solution Approach 2:
The L-shaped connection element serves multiple functions: it provides the primary transverse connection, supports the adjustable foot elements, and enables both stable configuration and compact stacking. This multi-functionality reduces the total part count and production cost.
3Strength
If the chair is designed with traditional connection bars for stability, then the structural strength is improved, but the storage efficiency and transport efficiency deteriorate
Solution Approach 1:
The adjustable foot elements can be repositioned or removed to transform the chair from a stable operational configuration to a compact stacking configuration, enabling efficient storage and transport while maintaining structural strength when needed.
Solution Approach 2:
The separable connection design allows the chair to be disassembled into smaller components for storage, reducing the volume occupied during transport and storage while maintaining full structural strength during use.
4Stability of the object's composition
If the chair is designed for stable assembly with multiple connection points, then the chair stability is improved, but the ease of assembly and disassembly deteriorates
Solution Approach 1:
The connection system is segmented into distinct modular components with standardized interfaces, allowing simple assembly and disassembly while maintaining stable connection when assembled. Each segment has a defined function and connection method.
Solution Approach 2:
The adjustable foot elements can be easily positioned and secured at different locations, providing both ease of assembly and the ability to optimize stability based on specific usage conditions.
Data Source
Figure 1~2
Figure 3~5
Figure 6~7a
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.