Cross-Hinged Rod Support Structure for Stable Folding Swing Chairs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Folding swing chairs face instability due to excessive hinge points, leading to easy tipping and inadequate support, especially when designed with a single support rod structure.
Innovation Solution
A folding swing chair support system featuring two cross-hinged long rod sets with short rod sets, forming a stable four-point ground support and four suspension points, along with woven straps and blind tubes for enhanced stability and support, and a three-sided enclosed seat structure for improved user comfort and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single support rod structure is used with multiple hinge points, then the chair can be folded and moved easily, but the structure becomes unstable and prone to tipping
Solution Approach 1:
The support structure is divided into multiple independent rod segments (front support rod, rear support rod, connecting rods) that are hinged together. This segmentation allows the structure to be folded for portability while maintaining stability when deployed, as each segment can be independently positioned to form a stable geometric configuration.
Solution Approach 2:
The patent employs asymmetric rod length configurations where front support rods differ from rear support rods, and connecting rods have specific length relationships. This asymmetry creates an inherently stable triangular and trapezoidal geometric structure that resists tipping while allowing controlled folding motion at the hinges.
2Adaptability or versatility
If multiple hinge points are used to enable folding, then the chair can be collapsed for storage, but too many hinge points lead to instability
Solution Approach 1:
The hinge connections are designed to be dynamic rather than fixed, allowing the structure to transition between folded and unfolded states. The hinges enable controlled rotation at specific joints, providing adaptability for folding while maintaining structural integrity when deployed, as the dynamic joints can accommodate movement while preserving the overall geometric stability.
3Ease of operation
If a flexible hanging seat is used, then the chair provides good swinging performance, but the chair becomes easy to tip over
Solution Approach 1:
The rigid support structure acts as a counterweight system that balances the flexible hanging seat. The wide base formed by the front and rear support rods creates a stable foundation that counteracts the tipping moment generated by the swinging motion of the flexible seat, allowing good swinging performance while preventing excessive tipping.
4Stability of the object's composition
If the support structure is made rigid to prevent tipping, then stability improves, but the chair loses its folding capability
Solution Approach 1:
The support structure is divided into multiple independent rod segments that are hinged together. This segmentation allows the structure to be folded for portability while maintaining stability when deployed, as each segment can be independently positioned to form a stable geometric configuration.
Solution Approach 2:
The hinge connections are designed to be dynamic rather than fixed, allowing the structure to transition between folded and unfolded states. The hinges enable controlled rotation at specific joints, providing adaptability for folding while maintaining structural integrity when deployed.
Data Source
AI summary
A folding swing chair support, which comprises: two long rod sets formed by cross-hinging two long rods and two short rod sets formed by cross-hinging two short rods. The two long rod sets stand on the front and rear facades, respectively, and the two sides are hinged by short rod sets to form an associated support as a whole; the upper ends of the two long rods in the long rod sets form suspension points, and the lower ends thereof function to support on the ground. The utility model is characterized by ingenious conception, stable structure, folding and unfolding linkage, and smooth operation.