Folding chair
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Solution Overview
Problem
Folding chairs have issues with large volume after folding and low structural stability, which hinder their usability and safety in outdoor and travel scenarios.
Innovation Solution
A folding chair design featuring a frame with hinged and sliding components, including stop lockers and locking sliders, that ensures stability and secure folding, with tubular bars and a seat surface, allowing for easy operation and compact storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the folding chair uses a simple hinge connection structure, then the ease of operation is improved, but the structural stability deteriorates
Solution Approach 1:
The patent introduces stop lockers as intermediary components between the hinge connections and the leg bars. These stop lockers act as mediators that provide additional locking functionality without complicating the basic hinge operation, thereby maintaining ease of operation while improving structural stability through enhanced joint security.
Solution Approach 2:
The stop lockers are designed to automatically engage and lock the hinge connections in place before the chair is fully assembled or loaded. This preliminary locking action ensures structural stability is established in advance, preventing joint loosening during use while requiring minimal user intervention.
2Volume of moving object
If the folding chair uses a compact folding design, then the volume after folding is reduced, but the structural stability deteriorates
Solution Approach 1:
The patent employs a nested folding mechanism where the seat and backrest components are designed to fold into and around the leg bar structure. The stop lockers are integrated into this nested arrangement, providing stability during the compact folded state without increasing the overall volume, as they are incorporated within the existing structural envelope.
3Stability of the object's composition
If the folding chair uses multiple locking components, then the structural stability is improved, but the device complexity increases
Solution Approach 1:
The stop lockers are designed as multi-functional components that simultaneously provide structural reinforcement, joint stabilization, and folding assistance. By making these components universal in their functionality, the patent improves structural stability without proportionally increasing device complexity, as each component performs multiple roles within the chair structure.
Data Source
AI summary
A folding chair includes a seat surface and a frame. The frame includes two front leg bars, two rear leg bars, two backrest bars, front crossed bars arranged between the two front leg bars, rear crossed bars arranged between the two rear leg bars, left crossed bars arranged between the left front leg bar and the left rear leg bar, and right crossed bars arranged between the right front leg bar and the right rear leg bar. The upper portions of the two front leg bars are provided with front hinge members. The front sliding sleeves are provided on the two front leg bars under the front hinge members. The stop lockers are provided on the two rear leg bars. The backrest sliding sleeves are provided on the two backrest bars.