Folding chair
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Solution Overview
Problem
Conventional folding chairs occupy too much space when collapsed and lack stability and load capacity in their extended state due to their design, which limits portability and usability.
Innovation Solution
The folding chair design includes a complex system of interconnected components such as seat receivers, leg connectors, armrests, and sliders that allow the chair to collapse into a compact bundle while maintaining improved stability and load capacity when extended, utilizing pivot sections, cradle sections, and sliders to facilitate easy assembly and disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the folding chair is collapsed with the legs and seat pivotally moved toward the frame, then the chair can be stored, but the frame and seat still maintain their overall width causing the collapsed chair to occupy large space
Solution Approach 1:
The chair is divided into multiple independent components including front legs, rear legs, seat, backrest, and armrests that can be independently collapsed and stored. Each component has its own collapsing mechanism allowing the entire structure to be broken down into smaller segments that occupy less storage space.
Solution Approach 2:
The collapsing mechanism allows components to be nested within each other during collapse. The seat and backrest are positioned to nest within the space created by the collapsed legs, creating a compact bundled state that significantly reduces the volume occupied during storage.
2Ease of operation
If the folding chair is designed with simple pivot connections for easy collapse, then portability is improved, but the extended chair lacks stability and load capacity
Solution Approach 1:
The chair employs dynamic support mechanisms where the number and configuration of support points change based on the chair's state. In the extended state, multiple supports including front supports, rear supports, and leg connectors are activated to provide stability. During collapse, these supports are dynamically repositioned or disengaged to facilitate compact storage.
Solution Approach 2:
Multiple support functions are combined into integrated components. The leg connectors serve both as structural joiners and as additional support points. The armrests are designed to provide both user comfort and structural support to the overall framework, maximizing the utility of each component for both portability and stability.
3Ease of operation
If conventional pivot connections are used for simple assembly, then ease of operation is improved, but the structure lacks sufficient load capacity and support
Solution Approach 1:
The support structure transitions from a static conventional design to a dynamic multi-point support system. When extended, the chair automatically engages multiple support points including front supports, rear supports, and leg connectors that work together to distribute and bear the load, significantly increasing load capacity beyond what simple pivot connections could provide.
Data Source
AI summary
A folding chair includes a right seat receiver, right front and rear legs, right armrest, a right armrest post, a right leg connecting member, a right backrest support, first and second right front support, and first and second right rear supports; a left seat receiver, left front and rear legs, a left armrest, a left armrest post, a left leg connecting member, a left backrest support, first and second left front support, and first and second left rear supports; a middle seat receiver, middle front and rear legs, a middle seat receiver post, a middle leg connecting member, a middle backrest support; a seat; and a backrest. These components are connected to one another that the folding chair can be collapsed into a bundle to be conveniently portable without occupying too much space; and the folding chair extended from the collapsed state provides improved stability and load capacity.