Foldable Chair Slant Support Mechanism to Eliminate Locking Failure
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Solution Overview
Problem
Folding rocking chairs have complex structures and prone to locking failure, leading to instability and cumbersome unfolding and folding processes, posing safety hazards and requiring manual checks.
Innovation Solution
A folding chair design featuring mirror-symmetric slant support mechanisms and a linkage mechanism with a pressing mechanism and cushion, where the pressing mechanism transmits weight to first connecting members to stabilize the chair during unfolding and facilitates easy folding by allowing the first connecting members to move upward along standing posts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a locking mechanism is used to prevent folding during use, then the chair stability is improved, but the device complexity increases and the locking mechanism is prone to failure
Solution Approach 1:
The patent removes the locking mechanism entirely from the chair structure. Instead of adding a complex locking device, the design uses the inherent mechanical properties of the slant support posts and connecting members to maintain stability during use while allowing easy folding when needed.
Solution Approach 2:
The chair structure automatically maintains its unfolded stable state through the mechanical interaction between slant support posts and connecting members without requiring any additional locking components. The design serves itself by using the weight-bearing function to simultaneously provide stability and enable easy folding.
2Stability of the object's composition
If a locking mechanism is used to prevent folding during use, then the chair stability is improved, but the reliability decreases due to locking failure
Solution Approach 1:
By completely removing the locking mechanism, the patent eliminates the source of potential locking failures. The stability is achieved through the inherent mechanical structure rather than a separate locking component that could fail.
Solution Approach 2:
The structure uses its own weight-bearing function to maintain stability without relying on a separate locking system. The slant support posts and connecting members work together to provide both stability and folding capability, eliminating reliability concerns associated with locking mechanisms.
3Ease of operation
If the chair structure is simplified without locking mechanism, then the ease of operation is improved, but the stability during use may be compromised
Solution Approach 1:
The patent employs dynamic elements including slidable connecting members that can move along the standing posts, and hinged linkage posts that allow smooth transitions between folded and unfolded states. These dynamic features enable easy operation while maintaining stability when needed.
Solution Approach 2:
The chair is divided into modular components including slant support posts, standing posts, connecting members, and linkage posts. This segmentation allows each component to perform its specific function independently, enabling easy folding operation while maintaining overall structural stability during use.
Data Source
AI summary
A folding chair is provided. The folding chair includes two mirror-symmetric slant support mechanisms and a linkage mechanism connected between the two slant support mechanisms, where the slant support mechanisms each include two slant support posts and two bottom frame posts; the linkage mechanism includes two linkage posts that cross each other and are hinged; upper ends of the two slant support posts and an upper end of a linkage post are hinged to a first connecting member; first ends of the two bottom frame posts are respectively hinged to the two slant support posts, and second ends of the two bottom frame posts are hinged; lower ends of the two linkage posts are respectively connected to the two slant support mechanisms; the folding chair further includes a pressing mechanism and a cushion.