Symmetrical Folding Device with Dual Operating Levers
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Solution Overview
Problem
Existing folding tables with blocking lever mechanisms are impractical for frequent handling, as it is unclear which side the locking handle is located, requiring staff to bend down and potentially leading to accidental unlocking and instability during setup and teardown, especially in outdoor or multi-purpose settings.
Innovation Solution
A folding device with a symmetrical design featuring two mirror-image folding mechanisms connected by a central rod, accessible from either side, allowing the table top to be easily unlocked and folded from either direction, using a visible operating lever with four distinct positions to manage the locking hooks, ensuring stability and ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a locking lever mechanism with a handlebar is used on folding tables, then the locking mechanism is simple in principle, but it becomes impractical for frequent handling because staff cannot see which side the handle is located on, requiring them to bend down and potentially leading to accidental unlocking
Solution Approach 1:
The locking mechanism is divided into two independent locking devices, each with its own locking element and operating lever. This segmentation allows each locking device to be independently operated from either side of the table, eliminating the need to bend down to access a single central handlebar while maintaining mechanical simplicity
Solution Approach 2:
The two locking devices are designed as mirror images of each other, creating a symmetrical overall structure that provides asymmetrical solutions at the component level. Each locking device is specifically configured to be operable from its respective side, making the handle visibly accessible from above without compromising the simplicity of the locking mechanism
2Ease of operation
If a central handlebar locking mechanism is used, then both locking hooks can be operated from the middle of the table, but this leads to accidental release by guests pressing it with a knee or foot, causing instability
Solution Approach 1:
The single centralized locking mechanism is segmented into two separate locking devices positioned at opposite ends of the table. Each locking device has its own operating lever positioned high and away from the table center, making it inaccessible to guests who might accidentally press a central handlebar with their knee or foot, thereby preventing accidental release while maintaining ease of operation
Solution Approach 2:
A rod connects the two locking devices through the central tube, serving as an intermediary that mechanically links the symmetrically positioned locking elements. This allows synchronized operation from either side while positioning the operating levers away from the vulnerable central area, preventing accidental activation while maintaining the benefit of centralized locking control
3Device complexity
If staff must bend down to locate and operate the locking handle, then the locking mechanism remains simple, but this increases handling time and reduces productivity during setup and teardown
Solution Approach 1:
The locking system is segmented into two independently operable locking devices with operating levers positioned at high, accessible locations on opposite sides of the table. This allows staff to quickly locate and operate the locking mechanism from a standing position without bending down, significantly reducing handling time during setup and teardown while maintaining the simplicity of the mechanical locking principle
Solution Approach 2:
The operating levers are pre-positioned in a visible and accessible location above the table surface, allowing staff to immediately identify and operate the locking mechanism upon approaching the table. This preliminary positioning eliminates the need to bend down and search for the handle, increasing productivity during frequent table handling operations
Data Source
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AI summary
The invention relates to a folding device (3) for a folding table and a folding table with this folding device (3). The tabletop can be folded away from a supporting structure in two opposing directions. It can also be removable from the supporting structure. The folding device (3) has at least one axis of rotation, for example, two bolts (16, 17), one for each folding direction. These bolts (16, 17) interact with a releasable hook (14, 15), one for each folding direction, to secure the tabletop in a horizontal position relative to the supporting structure. The folding table according to the invention can be unlocked from either side of the table by means of an operating lever (7) and folded either around one or the other longitudinal axis of the table. Disassembling and setting up a large number of folding tables results in simplified handling and time savings.