Armrest-foldable chair
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Solution Overview
Problem
Existing foldable chairs have a non-compact folded structure, making them inconvenient for storage and carriage due to their large volume and height.
Innovation Solution
The armrest-foldable chair employs a unique integral folding structure with two opposed folding mechanisms and linkage mechanisms, allowing for a more compact folded configuration by adjusting the angles between rods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional folding structures are used, then the chair can be folded and unfolded, but the folded structure is large in volume and height, making storage and carriage inconvenient
Solution Approach 1:
The patent implements a nested folding structure where the seat rod is received within the back rod, and the front support rod and rear support rod are nested within the main support rod. This nesting arrangement significantly reduces the overall volume and height of the folded chair, making it compact and convenient for storage and carriage while maintaining the folding functionality.
2Volume of moving object
If compact folding structure is achieved, then storage and carriage become easier, but the structure complexity increases
Solution Approach 1:
The patent divides the folding mechanism into multiple independent connection pieces (first, second, third, and fourth connection pieces) that can slide along respective rods. Each connection piece is responsible for a specific folding movement, allowing the complex folding action to be segmented into simpler, independent movements. This segmentation reduces the overall structural complexity while achieving compact folding.
Solution Approach 2:
The patent employs sliding connections between the connection pieces and rods, allowing dynamic adjustment during the folding process. The connection pieces can slide along the rods to accommodate the changing geometry during folding and unfolding, enabling a compact folded state without requiring overly complex fixed structures.
Data Source
AI summary
An armrest-foldable chair is provided. The armrest-foldable chair comprises folding mechanisms comprising a main support rod, a front support rod, a rear support rod, a seat rod, a back rod, an armrest rod, an auxiliary rod; a first connection piece slidably connected with the back rod is disposed on the back rod; a second connection piece slidably connected with the front support rod is disposed on the front support rod; a third connection piece slidably connected with the rear support rod is disposed on the rear support rod; and a fourth connection piece slidably connected with the main support rod is disposed on the main support rod. A first end of the auxiliary rod is hinged to the first connection piece, and a second end of the auxiliary rod is hinged to an upper end of the front support rod.