Extendable Table Lift Assembly for Single-Person Leaf Deployment
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Solution Overview
Problem
Existing extendable tables are inconvenient to deploy and stow due to the need for two individuals to separate sections and manually raise/lower the leaf, which is awkward and heavy, and often feature bulky and complicated mechanical systems that are not suitable for outdoor use.
Innovation Solution
An extendable table design featuring a lift assembly with a lifting arm that contacts a third leaf, and a roller assembly with a guide plate that receives the lifting arm, allowing the third leaf to be moved between deployed and undeployed positions based on the movement of the first and second leaves, facilitating single-person operation and outdoor use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a mechanical system is added to aid leaf deployment, then ease of operation is improved, but device complexity increases and becomes bulky
Solution Approach 1:
The patent replaces complex mechanical systems with a simple roller assembly that uses the natural sliding movement of leaves to automatically deploy or stow the third leaf. The roller assembly acts as a passive guide that converts horizontal leaf movement into vertical leaf deployment without requiring motors, gears, or complex linkages.
Solution Approach 2:
The system uses the movement of the first and second leaves themselves to power the deployment of the third leaf. As users slide the first or second leaf to extend or compress the table, this movement automatically triggers the roller assembly to raise or lower the third leaf, making the system self-actuating without external power sources.
2Device complexity
If manual lifting is used, then device complexity is reduced, but ease of operation deteriorates due to awkward and heavy leaf handling
Solution Approach 1:
The patent replaces manual lifting with a roller assembly mechanism that automatically raises and lowers the third leaf through a simple guide plate and roller interaction. This eliminates the need for users to manually lift the heavy leaf while keeping the mechanical system minimal and simple.
3Ease of operation
If existing mechanical systems are used, then ease of operation is improved, but visual appearance deteriorates and outdoor suitability is reduced
Solution Approach 1:
The patent replaces bulky mechanical systems with a compact roller assembly that has a minimal visual profile. The guide plate and roller design allows the mechanism to be concealed within the table structure, maintaining clean lines and aesthetic appearance suitable for outdoor furniture while still providing automated leaf deployment.
Data Source
AI summary
An extendable table includes at least one leg that primarily extends in a vertical direction so as to define a vertical axis and a frame that is supported by the at least one leg. The extendable table also includes a first leaf slidably supported by the frame, a second leaf slidably supported by the frame, and a third leaf supported by the frame and selectively disposed between the first leaf and the second leaf. The extendable table also includes a lift assembly that includes a lifting arm that contacts the third leaf and a roller assembly that includes a guide plate that selectively receives the lifting arm of the lift assembly. The lift assembly and the roller assembly cooperate to move the third leaf between an undeployed position and a deployed position based upon movement of at least one of the first leaf and the second leaf.