Moon Chair Frame With Sliding Triangular Support for Easy Folding
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Solution Overview
Problem
Existing moon chair structures are complicated and lack stability, making them difficult to fold and store conveniently while providing a safe and comfortable seating experience.
Innovation Solution
A moon chair structure featuring a seat ring tube supported by intersecting front and rear leg tubes and back rods, forming dynamic and variable triangular structures with slidable sleeves and hinge connections, allowing for easy folding and improved stability with parallel back supporting rods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If complicated supporting legs sets and movable hinge structures are used, then the moon chair can be folded, but the structure becomes complicated and stability deteriorates
Solution Approach 1:
The supporting legs are divided into front and rear leg tubes with distinct functions. The front leg tube provides structural support while the rear leg tube with slidable sleeves enables folding motion. This segmentation allows each component to be optimized for its specific role, simplifying the overall structure while maintaining foldability.
Solution Approach 2:
The patent introduces slidable sleeves that move along the rear leg tube to enable dynamic folding and unfolding of the chair. This dynamic mechanism replaces complex movable hinge structures with a simpler linear sliding motion, achieving foldability through controlled movement rather than complex joint mechanisms.
2Ease of operation
If more connecting components and sliding mechanisms are added, then the moon chair can fold, but the structure becomes complicated
Solution Approach 1:
The patent combines the supporting and folding functions into an integrated structure. The rear leg tube itself serves as both a support element and a guide for the slidable sleeves, eliminating the need for separate folding mechanisms. The back supporting rods are also integrated into the leg structure, reducing the total number of discrete components.
Solution Approach 2:
The slidable sleeves serve multiple functions: they guide the folding motion, provide structural connection between legs, and maintain stability during both folded and unfolded states. This multi-functionality reduces the need for dedicated components for each function, simplifying the overall structure.
3Device complexity
If simple supporting structures are used, then the structure is simplified, but stability deteriorates
Solution Approach 1:
The back supporting rods are pre-positioned to extend through the space confined by the seat ring tube, creating preliminary structural support. When the chair is assembled, these rods are already in place to provide stability, eliminating the need for complex additional bracing structures.
Solution Approach 2:
The patent uses curved or angled configurations for the leg tubes and supporting rods rather than purely straight linear elements. This curvature optimizes the distribution of forces and creates more stable geometric configurations while maintaining structural simplicity.
Data Source
AI summary
A moon chair structure comprising a seat ring tube, a front leg tube, a rear leg tube and back supporting rods; the front leg tube, the rear leg tube and the back supporting rods form a frame for supporting the seat ring tube; the rear leg tube and the front leg tube intersect with each other to form a supporting leg; slidable sleeves are provided at top ends of the rear leg tube; the slidable sleeves sleeve on the back supporting rods for forward and backward sliding movement on the back supporting rods; the slidable sleeves disposed at the top ends of the rear leg tube are slidable with respective to the back supporting rods; dynamic and variable triangular structures are formed by coordination between the rear leg tube, the front leg tube and the back supporting rods.