Telescopic Folding Stool Legs for Compact Aligned Storage
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Solution Overview
Problem
Existing stools with foldable legs face challenges in compact storage and transportation due to uneven leg heights and inability of the seat and legs to be closely aligned when folded, leading to inefficient space usage and inconvenience.
Innovation Solution
A stool design featuring telescopic legs with a hollow outer rod and sliding rod structure, where the sliding rod can extend to ensure all legs are the same height and align closely when folded, allowing for complete attachment of the seat to the legs, thus minimizing storage space and enhancing portability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If both legs and seat are folded to the middle symmetrically, then the stool can be folded compactly, but the two legs cannot be sufficiently close to each other and the heights of two legs are almost the same
Solution Approach 1:
The patent applies dynamic adjustment by making two legs telescopic while keeping the other two legs fixed. During folding, the telescopic legs can adjust their lengths dynamically to ensure all four legs reach the same height, enabling complete compactness while maintaining ease of storage and transport.
2Volume of moving object
If legs are folded together and seat is folded close to legs, then the legs can be close to each other, but the heights of the legs are different making storage inconvenient
Solution Approach 1:
The patent uses dynamic length adjustment of two telescopic legs during the folding process to compensate for height differences, ensuring that all four legs reach the same height when folded, thus maintaining both compactness and stability.
Solution Approach 2:
The patent changes the length parameter of two legs dynamically during folding by using telescopic structures, allowing the legs to adjust their lengths to achieve uniform height when folded, resolving the height inconsistency issue.
3Stability of the object's composition
If telescopic rod structure is added to two parallel legs, then the sliding rod can slide out to ensure same height when folded, but the device complexity increases
Solution Approach 1:
The patent divides the four legs into two groups: two fixed legs and two telescopic legs. This segmentation allows the telescopic legs to adjust their lengths while the fixed legs provide stable support, achieving height uniformity without making all legs complex.
Solution Approach 2:
The patent applies telescopic structures only to two specific parallel legs rather than all four legs, creating local quality differentiation. This reduces overall structural complexity while still achieving the goal of uniform leg height when folded.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The telescopic leg design allows for maximum space savings and convenient storage and transport by ensuring all legs are the same height when folded, facilitating easier arrangement and handling of the stool.
Implementation Method 1
a screw thread connecting structure for fixing the sliding rod. The screw thread connecting structure includes: fixing apertures disposed both on the outer rod and the sliding rod; screws used for locking the fixing apertures, the sliding rod and the outer rod.
Data Source
AI summary
A stool with telescopic legs, including a seat and four legs that have a first two legs disposed on a first side of the seat, and a second two legs disposed on a second side of the seat opposite to the first side. The four legs are of the same length. A first end of each of the four legs is hinged to the seat. The first two legs respectively pivotally cross the second two legs, thereby forming two crossing joints that are connected by a cross beam. The second two legs each has a telescopic rod structure, such that, when the stool is folded, the telescopic rod structure extends, and second ends of the first and second two legs opposite to the first ends are aligned.