Folding Table Hinge with Intermeshing Fingers to Prevent Sagging
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Solution Overview
Problem
Foldable tables tend to sag or unintentionally fold during use due to lack of rigidity and require robust hinges that do not hinder storage folding, making them difficult to maneuver and store.
Innovation Solution
A hinge mechanism with support beams and rotatable rods featuring intermeshing fingers that lock the table in the use position and unlock for storage, preventing sagging and facilitating easy folding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a robust hinge mechanism is used to prevent sagging in the use position, then the table's stability is improved, but the device complexity increases
Solution Approach 1:
The hinge mechanism transitions between two distinct states: a locked state during use where the tabletop halves are rigidly connected, and an unlocked state during storage where they can fold freely. The fingers and grooves dynamically engage or disengage based on the table's configuration, providing stability when needed without permanent complexity.
Solution Approach 2:
The hinge mechanism is divided into discrete components: support beams, rotatable rods with fingers, and grooves in the tabletop halves. These segmented elements work together to provide the locking function, with each component having a specific role in either stabilizing or enabling folding of the table.
2Ease of operation
If the table is designed to fold in half for storage, then the ease of operation is improved, but the stability in the use position deteriorates
Solution Approach 1:
The hinge mechanism provides dynamic behavior by locking the tabletop halves in a rigid configuration during use, then unlocking to allow free folding during storage. The fingers engage with grooves to prevent relative movement when extended, but disengage to permit folding when collapsed.
Solution Approach 2:
The hinge mechanism automatically locks and unlocks based on the position of the legs. When legs are extended, the fingers naturally engage with the grooves to lock the tabletop. When legs are collapsed, the fingers disengage, allowing the table to fold without requiring additional locking or unlocking actions.
3Stability of the object's composition
If the hinge mechanism locks the tabletop halves in the use position, then the stability is improved, but the ease of operation for folding deteriorates
Solution Approach 1:
The hinge mechanism is designed to automatically lock and unlock based on the leg position. The fingers engage with grooves when legs are extended, and disengage when legs are collapsed, eliminating the need for separate locking or unlocking operations and maintaining ease of folding.
Solution Approach 2:
The mechanism transitions between locked and unlocked states based on the dynamic position of the legs. The fingers and grooves are positioned such that the natural movement of the legs during setup or storage automatically controls the engagement and disengagement of the locking elements.
Data Source
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AI summary
A tabletop having a first half and a second half that rotate about a central axis between an extended position and a storage position. The table includes a hinge disposed between first and second beams attached to the underside of the tabletop adjacent to the central axis. A first support rod is rotatably attached to the underside of the tabletop and has a proximal end attached to a first leg and a distal end having at least two first fingers projecting therefrom. A second support rod is rotatably attached to the underside of the tabletop and has a proximal end attached to a second leg and a distal end having one or more second fingers projecting therefrom. Upon rotation of the first and second legs between extended and collapsed positions, the at least two first fingers engage and disengage with the one or more second fingers.