Synchronizing Bar Assembly for Faster Drawer Ejector Fitting
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Solution Overview
Problem
Existing ejector assemblies for movable furniture parts, such as drawers, require complex and time-consuming fitting processes for synchronizing bars, which can be cumbersome and prone to errors due to varying lengths and alignment issues.
Innovation Solution
The design incorporates a slidable receptacle for the synchronizing bar within one ejector unit, equipped with a positioning member, such as a spring element and guide element, allowing for easy insertion and centering between two ejector units, enabling length adjustment up to 30 mm and ensuring reliable synchronization, with features like a bayonet or gate mechanism for secure locking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the synchronizing bar is cut to length by a technician and fitted conjointly with the ejector units, then the fitting process is complex and time-consuming, but the synchronizing bar can be customized to the exact length needed
Solution Approach 1:
The synchronizing bar is designed with telescopic sections that allow it to extend and compress, enabling adjustment of its length. This dynamic structure replaces the static custom-cut bar, allowing technicians to adjust the length in-situ without requiring precise pre-cutting, thus reducing fitting time while maintaining precision
Solution Approach 2:
The synchronizing bar's length parameter is made variable through the telescopic mechanism. Instead of fixing the length during manufacturing, the bar can be adjusted to different lengths during installation to accommodate varying distances between ejector units, solving both the precision and time constraints
2Loss of time
If the synchronizing bar is made adjustable to accommodate varying lengths, then fitting time is reduced, but the device complexity increases
Solution Approach 1:
The synchronizing bar is divided into multiple telescopic sections that can slide relative to each other. This segmentation allows the bar to achieve variable length through simple sliding movements of discrete sections, rather than requiring a complex continuous adjustment mechanism, thus balancing adjustability with structural simplicity
Solution Approach 2:
The telescopic sections of the synchronizing bar are nested within each other, with one section sliding inside another. This nested configuration allows for compact storage when not in use and simple extension/compression for adjustment, reducing overall complexity while maintaining the adjustable length capability
3Measurement precision
If the synchronizing bar is inserted deeply into the receptacle for positioning, then alignment precision is improved, but the receptacle structure becomes more complex
Solution Approach 1:
A positioning member is introduced as an intermediary element between the synchronizing bar and the receptacle. This positioning member features a cam-shaped surface that guides the synchronizing bar into precise alignment as it is inserted, achieving high alignment precision without requiring complex internal receptacle structures or adjustment mechanisms
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
This solution simplifies the fitting process of the synchronizing bar separately from the ejector units, ensures precise alignment, and allows for length adjustment, ensuring reliable and simultaneous triggering of the ejector units, enhancing the ease and accuracy of drawer opening.
Implementation Method 1
a positioning member (16) for positioning the synchronizing bar (14) in a functional position between the ejector units (12, 13) is provided
Data Source
AI summary
An ejector assembly for a movable furniture part, for example a drawer, composed of two ejector units that are interconnected by a synchronizing bar. The ejector units are provided for ejecting the movable furniture part in an opening direction of an item of furniture in relation to a furniture base unit of the item of furniture. The synchronizing bar synchronizes a switching function of the ejector units. At least one ejector unit is designed in such a manner that the synchronizing bar on a receptacle of the first ejector unit is slidable so far inward that said synchronizing bar may be introduced into a receptacle of an opposite second ejector unit. A positioning member for positioning the synchronizing bar in a functional position between the ejector units is provided.