Scissor Table Safety Spacer and Snap-Fit Tabletop Locking
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Solution Overview
Problem
Banquet or event tables with scissor legs pose safety hazards due to pinching when folding, and securing the tabletop can be challenging, leading to instability and difficulty in assembly and storage.
Innovation Solution
A scissor-type banquet table design featuring pivotally coupled leg frames with safety spacers to prevent finger pinching and a snap-fit mechanism for secure tabletop attachment, allowing easy assembly and disassembly without tools, and robust legs for stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If scissor legs are designed to pivot in close proximity for compact storage, then storage efficiency is improved, but user safety deteriorates due to finger pinching hazards
Solution Approach 1:
A safety spacer is introduced as an intermediary component between the adjacent spars of the scissor legs. This spacer maintains a gap greater than 3/4'' between the spars during pivoting motion, preventing finger pinching while allowing the legs to fold into a compact storage configuration. The spacer acts as a mediator that resolves the conflict between compactness and safety by enabling close proximity positioning without direct contact between spars.
2Stability of the object's composition
If the tabletop is positively locked to the leg structure for security, then stability is improved, but assembly and disassembly difficulty increases
Solution Approach 1:
The locking mechanism transitions from a static, permanent connection to a dynamic, reversible system. Detents with tapered heads engage with holes in the leg structure to provide positive locking and stability during use. However, the tapered geometry allows the detents to be easily disengaged by applying force in a specific direction, enabling quick assembly and disassembly without tools. The system adapts its state between locked and unlocked configurations based on operational needs.
3Ease of operation
If the tabletop is passively disposed on the leg structure for easy assembly, then assembly ease is improved, but stability and resistance to tipping deteriorates
Solution Approach 1:
The connection system evolves from a purely passive support arrangement to a dynamic locking mechanism. Detents with tapered heads automatically engage with corresponding holes in the leg structure when the tabletop is placed on it, providing passive assembly ease. Once engaged, the detents create positive locking that prevents tipping and displacement during use. The same mechanism allows easy disassembly by applying force to disengage the detents from the holes.
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 design enhances user safety by preventing finger pinching, securely attaches the tabletop, and facilitates efficient storage and use with a robust and stable structure.
Implementation Method 1
A safety spacer is disposed between the adjacent spars of the pair of leg frames and separates the adjacent spars. The safety spacer has a thickness so that the adjacent spars are spaced-apart by a gap greater than 3⁄4′′ to resist pinching a user's fingers in a scissor effect between the adjacent spars as the leg frames pivot between the open use configuration and the closed storage configuration.
Implementation Method 2
The tabletop and the stand are coupled together with a snap-fit. The snap-fit comprises detents between the tabletop and the stand. Each detent is biased into a respective hole along an axis between the detent and the respective hole. Each detent has a tapered head with a reduced diameter engageable with and bearable against a perimeter of the respective hole. A lesser applied force applied transverse to the axis maintains the tapered head in the respective hole, while a greater applied force applied transverse to the axis displaces the tapered head along the axis out of the respective hole.
Data Source
AI summary
A scissor-type banquet or event table comprises a tabletop removably coupled to and disposable upon a stand. The stand comprises a pair of leg frames pivotally coupled together at an intersection. The pair of leg frames comprise adjacent spars with each of the spars associated with a different one of the pair of leg frames. A safety spacer is disposed between the adjacent spars of the pair of leg frames and separates the adjacent spars. The safety spacer has a thickness so that the adjacent spars are spaced-apart by a gap greater than ¾″ to resist pinching a user's fingers. In addition, the tabletop and the stand are coupled together with a snap-fit. The snap-fit comprises detents between the tabletop and the stand. Each detent is biased into a respective hole along an axis between the detent and the respective hole.