Scissor-Folding Table Base With Multi-Height Clamp Locking
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Solution Overview
Problem
Folding tables lack the ability to adjust to multiple table top heights, limiting their versatility for various tasks such as eating, reading, and working, and often do not fold compactly for storage.
Innovation Solution
A variable height folding table with a scissor-folding base assembly and a clamp system that allows the table top to pivot between multiple upright positions and collapse into a folded position, utilizing a blow-molded plastic table top and tubular metal legs for stability and weight reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a folding table is designed with fixed leg length, then the structure is simple and easy to manufacture, but the table cannot be used at multiple heights for different tasks
Solution Approach 1:
The table base employs a scissor-folding mechanism with pivotable legs that can dynamically adjust between multiple upright positions corresponding to different table heights. The legs pivot relative to each other at connection points, transforming the static structure into a dynamic one that adapts to various task requirements while maintaining structural integrity through the X-shaped configuration.
Solution Approach 2:
The table base is divided into segmented components including diagonal members, cross-members, and pivotable leg sections that can independently move relative to each other. This segmentation allows the legs to be adjusted to different positions and enables the table to achieve multiple height configurations while keeping each individual component relatively simple in design.
2Adaptability or versatility
If a folding table uses a scissor-folding base with pivotable legs, then multiple table heights are achievable, but the mechanism becomes more complex
Solution Approach 1:
The clamping mechanism utilizes spring biasing to automatically engage with retaining notches on the diagonal members, providing self-locking functionality at each upright position. The spring-loaded clamp naturally maintains the legs in their pivotable positions without requiring additional locking devices or complex control mechanisms, allowing the table to self-regulate its height configuration.
Solution Approach 2:
The clamp mechanism changes its engagement parameter by interacting with multiple retaining notches positioned at different locations along the diagonal members. By engaging different notches, the system discrete adjusts the table height parameter while maintaining a relatively simple clamp structure that relies on the geometric arrangement of notches rather than complex mechanical adjustments.
3Stability of the object's composition
If the table legs are made from tubular metal with cross-members, then structural stability is improved, but the weight of the table increases
Solution Approach 1:
The table base combines tubular metal diagonal members with cross-members to create a composite structural system. The tubular metal provides high strength-to-weight ratio and structural stability, while the cross-members add rigidity and form the X-shaped configuration. This composite approach achieves optimal stability while minimizing weight compared to solid metal or non-metal alternatives.
Solution Approach 2:
The use of tubular (circular cross-section) metal members provides optimal structural efficiency for bearing loads while minimizing material usage. The curved cylindrical shape of the tubes offers superior strength-to-weight characteristics compared to square or flat sections, enhancing stability without proportionally increasing weight.
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
Enables the table to be used at multiple heights for different tasks and folds compactly for storage, providing a versatile and space-efficient solution for personal use.
Implementation Method 1
a clamp, having a plurality of retaining notches for retaining the second leg upper cross-member, and biased against the lower surface of the table top by a spring
Data Source
AI summary
A folding table movable between a folded position and a plurality of upright positions is disclosed. Each of the upright positions corresponds to a different table height. The folding table includes a table top and a scissor-folding table base assembly having first and second legs. The second leg is slidably retained adjacent a lower surface of the table top, and the first and second legs are pivotably connected to one another to form an X-shape. A clamp having a plurality of retaining notches retains the second leg against the lower surface of the table top. Movement of the second leg from a first retaining notch to a second notch causes the table to move from a first to a second upright position, having a different tabletop height. The table legs may also be collapsed into a folded position.