Spring-Hinged Folding Tabletop Mechanism to Prevent Finger Pinch
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Solution Overview
Problem
Articles of furniture designed for folding often pose a risk of accidental finger catching in pinch points when transitioning between use and storage positions due to the lack of effective mechanisms to safely fold and unfold the structures.
Innovation Solution
A folding mechanism incorporating a plurality of hinges and spring elements that allow the tabletop to move from an unfolded to a folded position securely, with a locking device to prevent accidental unfolding and a biasing force to facilitate controlled folding and unfolding, reducing the risk of finger injury.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a folding mechanism is designed to allow easy transition between use and storage positions, then ease of operation is improved, but the risk of accidental finger catching in pinch points increases
Solution Approach 1:
The locking device is engaged before the folding operation begins, and the biasing force is pre-configured to control the folding sequence. This preliminary preparation ensures that the folding mechanism operates in a controlled manner, preventing accidental finger catching while maintaining ease of operation.
Solution Approach 2:
The biasing force acts as an intermediary between the user's input force and the folding structure. It mediates the folding process by providing controlled resistance and ensuring sequential movement, which reduces the risk of sudden movements that could cause finger injury while still allowing easy operation.
2Reliability
If a locking device is added to prevent accidental unfolding, then reliability is improved, but device complexity increases
Solution Approach 1:
The locking device is designed to automatically engage and disengage based on the folding state. When the furniture is folded, the locking device self-activates to prevent accidental unfolding, and when unfolded, it automatically releases. This self-service mechanism provides reliable protection without requiring additional manual operation or complex control systems.
Solution Approach 2:
The locking device is integrated with the existing folding mechanism components rather than being a separate independent system. The biasing force that already exists in the folding mechanism is utilized to drive the locking action, merging multiple functions into a unified structure that reduces overall complexity while improving reliability.
3Ease of operation
If spring elements are used to provide biasing force for controlled folding, then ease of operation is improved, but manufacturing complexity increases
Solution Approach 1:
The spring elements are selected and configured with specific parameters (spring constant, pre-load, installation position) that are optimized for the particular furniture design. By carefully selecting these parameters, the biasing force provides smooth controlled operation without requiring complex spring assemblies or multiple springs, thus maintaining ease of manufacture while achieving controlled folding.
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
The mechanism enables safe and controlled folding and unfolding of furniture, minimizing the risk of accidental finger catching and providing a user-friendly method to convert the furniture between use and storage positions without exposing hazardous pinch points.
Implementation Method 1
a folding mechanism incorporating a plurality of hinges and spring elements that allow the tabletop to move from an unfolded to a folded position securely, with a locking device to prevent accidental unfolding and a biasing force to facilitate controlled folding and unfolding
Data Source
AI summary
An article of furniture can include a base attached to a frame to support the frame on a floor. A tabletop may be attached to the frame. The frame and/or the tabletop may be attached to a folding mechanism so that first and second sections of the tabletop are moveable so that the tabletop is adjustable from an unfolded position to a folded position and vice versa. The folding mechanism may include a plurality of spring elements connected to a plurality of hinges that are configured to help control an amount of force needed for adjusting the tabletop's position and the rate of speed at which the tabletop is rotatable between its folded and unfolded positions.