Sliding-Leg Extension Table Structure for Wobble-Free Support
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Solution Overview
Problem
Extension tables made of wood face instability and potential collapse due to material expansion and contraction from humidity and temperature changes, leading to tension and wobbling legs, especially when uneven surfaces are encountered.
Innovation Solution
The extension table design features fasteners with sliding means that allow first table legs to adjust relative to the sliding table tops, releasing tension by sliding in the direction of extension, and using multiple supporting members with two legs each to stabilize the table, ensuring legs remain aligned and secure without tension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the table is made of wood, then the table has aesthetic appeal and natural material properties, but the table extends and contracts due to humidity and temperature changes causing tension and potential collapse
Solution Approach 1:
The patent applies dynamics by making the connection between the table top and legs adjustable rather than fixed. The fastener system allows the legs to move dynamically with the expanding and contracting wood, transforming a static rigid structure into a dynamic adaptive one that can accommodate dimensional changes without structural failure
Solution Approach 2:
The patent utilizes parameter changes by allowing the physical parameters of the table structure (leg position, fastener position) to change in response to environmental conditions. The oval bore mechanism enables the legs to adjust their position along the longitudinal axis as the wood expands or contracts, maintaining structural integrity through controlled parameter variation
2Stability of the object's composition
If the supporting legs are fixed rigidly, then the table structure is stable, but the legs cannot adjust to uneven surfaces causing wobbling and instability
Solution Approach 1:
The fastener system with oval bores creates a dynamic connection that allows legs to adjust their position independently. This dynamic mechanism enables the legs to adapt to uneven surfaces while maintaining overall structural stability, resolving the contradiction between rigidity and adaptability
Solution Approach 2:
The patent segments the connection system into independent adjustable components (individual fasteners with oval bores on each leg). This segmentation allows each leg to adjust independently to surface irregularities while the overall table structure remains stable, preventing wobbling
3Adaptability or versatility
If the legs are separated when the table is extended, then the extended leaf is supported, but the legs wobble on uneven ground reducing table stability
Solution Approach 1:
The dynamic fastener system allows separated legs to maintain stability on uneven ground during extension. Each leg can independently adjust its position through the oval bore mechanism, ensuring that even when separated to support the extended leaf, the legs remain stable and do not wobble
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
This design stabilizes the table by allowing legs to adjust with temperature changes, preventing collapse and wobbling, and maintaining stability on uneven surfaces by releasing tension and ensuring synchronized leg movement.
Implementation Method 1
Since wood extends and contracts due to inter alia humidity and temperature
Implementation Method 2
Since wood extends and contracts due to inter alia humidity and temperature
Implementation Method 3
fastening means co-operating with the sliding means of the fastener in order to secure the first table leg in the chosen position
Implementation Method 4
supporting the extension table with multiple legs when the sliding table tops are joined in a first position and supporting the extension table when the sliding table tops are pulled apart in a second position
Data Source
AI summary
An extension table with multiple legs with two table tops sliding back and forth in relation to each other and at least one leaf and at least four supporting members each comprising at least two table legs, including a first table leg and a second table leg. The supporting members support the extension table when the sliding table tops are joined in a first position, and they support the extension table when the sliding table tops are pulled apart in a second position. The first table legs in each supporting member are directly or indirectly connected to the sliding table tops through fasteners which, in one embodiment, comprise sliding means.