Folding table with simultaneously extending legs
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Solution Overview
Problem
Folding tables require users to extend and lock each leg individually, a slow and difficult process that often leads to the table being left set up, defeating its purpose.
Innovation Solution
A folding table design featuring a spherical four-bar linkage system where each leg is connected to a driver component with coupler hinges, allowing all legs to extend and lock simultaneously, either automatically under gravity or manually, for rapid setup and teardown.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If each leg is extended and locked individually, then the table structure is simple and easy to manufacture, but the setup time is long and operation is difficult
Solution Approach 1:
The patent combines four individual leg extension operations into a single unified operation. The driver component with four driver links connected to a common pivot point allows a single user action to simultaneously extend all four legs through the spherical four-bar linkage mechanism, resolving the contradiction between simple structure and rapid operation.
Solution Approach 2:
The patent introduces a dynamic linkage system that coordinates leg extension motion. The spherical four-bar linkage with movable pivots creates a dynamic mechanism where the motion of one leg automatically triggers and coordinates the motion of the other three legs, enabling simultaneous extension while maintaining structural simplicity.
2Productivity
If a spherical four-bar linkage system is used to extend all legs simultaneously, then the setup speed increases dramatically, but the device complexity increases
Solution Approach 1:
The driver component serves multiple functions simultaneously: it acts as a pivot point for all four driver links, provides the coordination mechanism for simultaneous leg extension, and functions as the primary control interface for the user. This multi-functionality reduces the need for additional separate components, offsetting the complexity of the linkage system.
Solution Approach 2:
The patent segments the leg extension function into four identical driver links that are structurally simple and interchangeable. Each driver link follows the same design pattern, allowing for simplified manufacturing and assembly despite the overall system's coordinated complexity. The segmentation into identical modules reduces design complexity while enabling simultaneous operation.
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 set up and taken down quickly, with legs extending and locking in less than five seconds, improving convenience and usability by allowing simultaneous operation of all legs with a single action.
Implementation Method 1
each leg is part of a spherical four bar linkage or driver component
Implementation Method 2
allowing all legs to extend and lock simultaneously, either automatically under gravity or manually
Data Source
AI summary
An example folding table with simultaneously extending legs includes a table top structure. The example table also includes a plurality of table legs to support the table top structure. Each of the table legs part of a spherical four bar linkage. The example table also includes a plurality of driver links for the plurality of table legs. The driver links each part of a single driver component with a pivot at a center of the table top structure. The example table also includes a rotating coupler for on each end of the driver links. When one of the table legs is folded and unfolded, the other table legs move simultaneously in a first direction to open and in a second direction to retract.