Split-Folding Furniture Support with Shaft-Guide Tube Rotation
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Solution Overview
Problem
Existing folding furniture designs face challenges in compact storage due to increased height when folded, and they often require complex and cumbersome assembly processes, leading to instability and potential breaking hazards during use.
Innovation Solution
A split-type folding furniture support device featuring a shaft and guide tube connection that allows for flexible joint rotation, enabling easy assembly and disassembly while reducing storage size, with radially distributed support rods and angled hinging for ergonomic stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional rotary assembly with two ring-shaped pads is used, then rotation function is supported, but the two discs cannot be released and height increases causing inconvenience for storage
Solution Approach 1:
The support device is divided into upper and lower separable parts that can be disconnected. The upper part includes an upper support rod and upper ring, while the lower part includes a lower support rod and lower ring. This segmentation allows the furniture to be folded into a compact size for storage while maintaining rotation function when assembled.
Solution Approach 2:
The connection between upper and lower parts is made dynamic through a shaft-guide tube mechanism that allows relative rotation. The shaft is locked on the upper ring and extends downward, while the guide tube is locked on the lower ring and extends upward, enabling the upper part to rotate relative to the lower part when seated upon.
2Ease of operation
If multiple plugs are used for detachable connection, then assembly and disassembly become possible, but the process becomes troublesome and time-consuming
Solution Approach 1:
Multiple separate plug connections are merged into a single integrated shaft-guide tube connection mechanism. Instead of requiring multiple plugs to connect the upper and lower parts, the design uses one shaft inserted into one guide tube to achieve both structural connection and rotation functionality, significantly simplifying the assembly process.
3Reliability
If multiple support tubes are used to support the cushion portion, then rotation function is fulfilled, but the joint strength cannot be ensured when weight deviates from center
Solution Approach 1:
The shaft acts as an intermediary element that transfers and distributes load between the upper and lower parts. When weight is applied to the cushion, the shaft mediates the force distribution, allowing the upper part to rotate relative to the lower part while ensuring the joint can withstand off-center loads without breaking.
Data Source
AI summary
A split folding furniture support device having an upper support portion and a lower support portion. The upper support section is connected and secured to the lower support section as the shaft inserts into the guide tube. The lower end of the upper main plate touches the upper end of lower main plate forming a load-bearing support. The device can be used to make folding tables, thin waist stool and rotary backrest chair with split, fold and rotation functions.