Segmented Hard Seat Structure for Portable Chair Sagging Prevention
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Solution Overview
Problem
Existing portable chairs fail to provide a comfortable and stable seating experience due to sagging issues caused by flexible materials, which compromise stability and user support.
Innovation Solution
A portable chair design featuring a chair frame formed by detachably coupled poles, a flexible chair cover, and a hard material seat member with a rear support, allowing for stable user support and comfort through a combination of angled support poles and a foldable seat structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the seat member is made of flexible material, then the chair is easy to manufacture and assemble, but the seat member sags downward and fails to provide stable seating support
Solution Approach 1:
The seat member is divided into multiple rigid plates (first plate, second plate, third plate) connected by flexible connectors. This segmentation allows each plate to maintain rigidity for stable support while the connectors provide flexibility for movement and assembly. The segmented structure resolves the contradiction by combining rigid support surfaces with flexible connections.
Solution Approach 2:
The seat member combines rigid plates (providing structural support and stability) with flexible connectors (providing movement capability and ease of assembly). This composite structure integrates both rigid and flexible properties, allowing the seat to be stable when occupied while remaining easy to assemble and adjust.
2Reliability
If the seat member is made of hard material, then stable seating support is provided, but the chair becomes more complex to manufacture and assemble
Solution Approach 1:
The hard seat member is segmented into multiple plates connected by flexible connectors, reducing the complexity of manufacturing a single large rigid piece. Each plate can be manufactured separately and assembled together, simplifying the overall manufacturing process while maintaining structural stability.
Solution Approach 2:
The seat member incorporates flexible connectors that allow dynamic adjustment and movement between the rigid plates. This dynamic capability simplifies assembly and adjustment processes while maintaining the rigidity needed for stable seating support when occupied.
3Ease of operation
If the chair frame uses detachable coupling, then portability and ease of assembly are improved, but structural stability may be compromised
Solution Approach 1:
The chair frame is divided into multiple poles that can be detachably coupled together. This segmentation enables easy assembly and disassembly for portability while allowing each pole to be optimized for its specific structural function, maintaining overall stability when assembled.
Solution Approach 2:
The chair frame uses bent poles with specific curvature profiles that provide structural strength and stability. The curved geometry of the poles enhances their load-bearing capacity while maintaining detachable coupling capabilities, resolving the contradiction between ease of assembly and structural stability.
Data Source
AI summary
A portable chair according to the present disclosure includes a chair frame formed by detachably coupling a plurality of poles, a chair cover detachably coupled to the chair frame and made of a flexible material supporting the body of a user, and a seat member installed at a portion of the chair cover, which supports a hip portion of the user, and made of a hard material.