Foldable step
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Solution Overview
Problem
Existing foldable steps require precise installation and adjustment of leg lengths to accommodate different cabinet heights, and they do not automatically position legs in full contact with the floor while maintaining horizontal steps.
Innovation Solution
A foldable step design featuring an upper and lower cross member coupled to the cupboard, with offset and vertical support members, and angled and inter-step support members that pivot and slide to adjust height and fold automatically, ensuring full contact with the floor without requiring adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If adjustable feet with threaded screws are used to accommodate different cabinet heights, then the foldable step can be adapted to various cabinet heights, but the device complexity and ease of installation are worsened
Solution Approach 1:
The patent employs dynamic linkages and pivot points that allow the foldable step to automatically adjust to different cabinet heights through mechanical motion. The linkage system transforms the static structure into a dynamic one that can adapt its configuration based on the cabinet height, eliminating the need for adjustable feet with threaded screws.
Solution Approach 2:
The foldable step design enables self-adjustment through its inherent mechanical structure. When installed, the linkage system automatically positions the steps at the correct height and angle without requiring user adjustment of leg lengths or threaded components. The structure serves itself by using the cabinet door opening angle to determine the step configuration.
2Manufacturing precision
If precise installation and leg length adjustment are required, then the foldable step can maintain horizontal steps, but the ease of installation and operation are worsened
Solution Approach 1:
The linkage mechanism incorporates geometric constraints and pivot points that provide automatic feedback during installation. As the cabinet door is opened to different angles, the linkage system automatically adjusts the step position and orientation to maintain proper horizontal alignment, eliminating the need for precise manual installation adjustments.
Solution Approach 2:
The patent uses asymmetric linkage configurations where the left and right sides of the foldable step have different arm lengths and pivot positions. This asymmetric design compensates for variations in cabinet height and installation precision, automatically maintaining horizontal step alignment through the mechanical advantage of the unequal arm configurations.
3Ease of manufacture
If the cupboard door provides structural support to the foldable step, then the installation is simplified, but the door structure may be compromised
Solution Approach 1:
The patent extracts the structural support function from the cupboard door itself and transfers it to the foldable step's self-contained linkage structure. The step unit carries its own structural load through its rigid linkage arms and pivot points, requiring only minimal attachment points on the door for mounting, thereby preserving door integrity while simplifying installation.
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 foldable step automatically adjusts to different cabinet heights, ensuring full contact with the floor and maintaining horizontal steps without the need for precise installation or leg length adjustments, providing stability and ease of use.
Implementation Method 1
at least two offset members pivotally coupled at one end to the cupboard support member; the offset members pivotally coupled at the other end to a vertical support member
Implementation Method 2
an angled support member pivotally coupled at one end to the end of the upper step support and slidably coupled along the angled support member to the lower step support member
Data Source
AI summary
The present invention relates to at least a foldable step. The step features an upper and a lower step supported by a structure including a right side each having a vertical support member, an angled support member, and upper and lower step support members. A horizontal front support member provides support for the lower step. Left and right diagonal support members are slidably coupled to the upper step support members. A rear horizontal support member and optional diagonal members provide additional support to the upper step. The step is foldable into a folded position, by folding both the upper and lower steps upwardly. The step has a minimal profile in the folded position.