Telescopic Folding Chair Structure for Lightweight Compact Storage
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Solution Overview
Problem
Conventional folding chairs face challenges in durability, portability, and storage due to their closed metal frames and molded plastic seat designs, which increase weight and manufacturing costs while compromising safety and design flexibility.
Innovation Solution
A telescopic folding chair design featuring a seat cushion with a tube frame and cushion, connected via telescopic rods and spring-loaded pins, allowing for ergonomic shaping and improved structural support while reducing weight and storage space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a closed metal frame is used around the cushion, then the structural strength is improved, but the design flexibility is reduced and manufacturing cost increases
Solution Approach 1:
The closed metal frame is segmented into separate components: the tube frame structure is divided into longitudinal and lateral members connected by corner joints. This segmentation allows independent optimization of each component while maintaining overall structural strength, and enables greater design flexibility through modular assembly of different frame configurations.
2Strength
If molded plastic seat is used, then the safety and bearing capability are improved, but the weight increases and storage space is wasted
Solution Approach 1:
The seat cushion assembly uses composite construction combining a lightweight tube frame structure with high-strength corner joints and cushioning material. This composite approach replaces solid molded plastic with a hollow tubular framework that maintains bearing capability through structural geometry and joint design while significantly reducing weight and material usage.
3Ease of operation
If telescopic rods are used, then the portability is improved, but the device complexity increases
Solution Approach 1:
The telescopic rods are designed with nested construction where inner tubular members slide within outer tubular members. This nesting approach allows the telescopic mechanism to be compact when retracted and extend when needed, improving portability while minimizing the increase in structural complexity through space-efficient design.
4Ease of operation
If the cushion thickness is increased, then the comfort is improved, but the weight and storage space increase
Solution Approach 1:
The cushion uses a thin-walled tube frame structure that provides structural support with minimal material thickness. The comfort function is achieved through the cushioning material inserted within the tubular frame and the ergonomic shaping of the thin-walled structure, rather than relying on thick solid material, thus maintaining comfort while reducing weight and storage requirements.
Data Source
AI summary
A convenient telescopic folding chair includes a front foot, back cushion, rear foot, seat cushion, and telescopic rods arranged between the rear foot and the seat cushion. The front foot pivots on the rear foot by connecting components. The back cushion is inserted into two ends of the front foot. The rear foot connects the seat cushion through two telescopic rods arranged to two ends of the rear foot. The seat cushion is further connected to the front foot through connecting components. The seat cushion includes a tube frame and a cushion. The cushion is fixed to the frame will two plugs formed to two lateral sides of the cushion inserting into two ends of the frame so as to form a convenient, space-saving, light and fine folding chair.