Collapsible step stool
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Solution Overview
Problem
Folding step stools with high load bearing capacity require time-consuming two-hand operations and are bulky when folded, necessitating a need for a compact, one-hand foldable and lightweight design.
Innovation Solution
A collapsible step stool with pivot-connected panels and synchronized folding mechanism using support posts, enabling single-hand operation and compact storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If folding step stools are designed with high load bearing capacity, then they can support heavy loads, but they require time-consuming two-hand operations to open or fold and are bulky when folded
Solution Approach 1:
The support post is designed to automatically engage with the tread panel during folding and unfolding operations. When the user applies force to unfold the stool, the support post naturally rises and locks into place on its own without requiring manual engagement. Similarly, during folding, the support post automatically disengages and returns to its stored position, enabling one-handed operation while maintaining high load bearing capacity
Solution Approach 2:
The support post incorporates a dynamic engagement mechanism that transitions between locked and unlocked states based on the folding/unfolding motion. The post can be easily disengaged during folding operations but provides automatic stable support when the stool is in the unfolded, load-bearing position, adapting its function to the operational phase
2Strength
If folding step stools are designed with high load bearing capacity, then they can support heavy loads, but they take up considerable space when folded
Solution Approach 1:
The support post is designed to nest within the structure of the folded stool. When the stool is collapsed, the support post retracts and stores in a compact position within the frame, allowing the entire assembly to fold into a smaller volume while maintaining the structural integrity needed for high load bearing capacity when deployed
3Weight of moving object
If folding step stools are made lightweight, then they are easier to carry, but they may compromise load bearing capacity
Solution Approach 1:
The support post and structural components utilize composite construction combining lightweight materials with high-strength elements. This allows the stool to maintain low weight for easy portability while the support post and critical load-bearing components provide sufficient strength to support heavy loads when deployed
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 stool allows for quick, single-hand folding and unfolding, maintaining high load capacity while occupying minimal space, with support posts ensuring stability and ease of use.
Implementation Method 1
Each folding tread panel includes a hinge to enable each folding tread panel to fold
Implementation Method 2
The folding front panel is pivot connected to each of the step-shaped side panels
Implementation Method 3
The support post is to rest on a surface and support the upper tread panel of the folding tread panels when the step stool is unfolded
Data Source
AI summary
A collapsible step stool includes step-shaped side panels and folding tread panels. Each folding tread panel is pivot connected to respective top edges of the step-shaped side panels to define a step when unfolded. Each folding tread panel includes a hinge to enable it to fold. A support post is connected to the hinges of adjacent folding tread panels. The support post rests on a surface and supports the upper one of the folding tread panels when the step stool is unfolded. The support post synchronizes the folding of the tread panels when collapsing the step stool.