Drawer Ejection Mechanism With Variable Spring Loading Path
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Solution Overview
Problem
Existing furniture drawer mechanisms require fixed end and start points for loading, limiting the functionality of the force accumulator and requiring varying forces to fully charge, depending on the furniture part's open position, which affects the ejector's performance.
Innovation Solution
A variable starting point for the loading section during the closing movement of the furniture part, allowing the energy accumulator to be fully charged regardless of the furniture part's open position, by adjusting the slope of the spring characteristic curve based on the starting point, ensuring efficient loading regardless of the open position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the end point and starting point of the loading section are fixed, then the structure is simple, but the force accumulator cannot be fully charged when the furniture part is opened beyond the starting point
Solution Approach 1:
The loading section is designed with a variable starting point that dynamically adapts based on the furniture part's position. The loading section extends from a fixed end point to a variable starting point determined by the furniture part's position at the beginning of closing movement, ensuring the force accumulator is always fully charged regardless of how far the furniture part is opened.
Solution Approach 2:
The starting point of the loading section changes as a parameter based on the furniture part's position. When the furniture part is slightly open, the loading distance is short requiring larger force; when fully open, the charging distance is large requiring less force. This parameter change ensures optimal charging conditions in all positions.
2Length of moving object
If the furniture part is slightly open, then the loading distance is short, but a relatively large amount of force must be applied to fully load the energy accumulator
Solution Approach 1:
The system accepts that loading force varies with loading distance. When the furniture part is slightly open, the loading distance is short and a relatively large force is applied; when fully open, the charging distance is large and significantly less force is required. This parameter relationship is inherent in the spring characteristic curve.
3Force
If the furniture part is fully open, then the charging distance is large, but significantly less force has to be used to fully charge the energy accumulator
Solution Approach 1:
The spring characteristic curve is utilized to create an inverse relationship between charging distance and required force. When the furniture part is fully open, the variable starting point creates a large charging distance over which significantly less force must be applied to achieve full charge of the energy accumulator.
4Adaptability or versatility
If the end point of the loading path is fixed relative to the furniture body, then the structure is simple, but the ejector performance is limited when the furniture part is opened beyond the starting point
Solution Approach 1:
The loading section is configured with a variable starting point that adapts to the furniture part's position. The loading section extends from the fixed end point to a variable starting point determined by the furniture part's position, ensuring the force accumulator can be fully charged regardless of how far the furniture part is opened, thereby maintaining ejector performance.
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
Ensures the energy accumulator is always fully charged, optimizing the loading process with adjustable force requirements, enhancing the functionality and efficiency of the drawer mechanism.
Implementation Method 1
the at least one force accumulator comprises a spring, preferably a torsion spring
Implementation Method 2
the at least one force accumulator comprises a spring, preferably a torsion spring
Data Source
Figure 1
Figure 2a~2b
Figure 3~4
AI summary
Arrangement (1) for moving a moveable furniture part (2), in particular a drawer, having - at least one ejection device (3) for the ejection of the furniture part (2) from the closed position to a first open position, wherein the at least one ejection device (3) comprises at least one force accumulator (4), - and at least one loading device (5) for the loading of the at least one force accumulator (4) by means of a closing movement of the furniture part (2), wherein the loading of the at least one force accumulator (4) is accomplished by means of a loading path (Deltax) having an end point (xf), and wherein the at least one force accumulator (4) is fully loaded at the end point (xf) of the loading path (Deltax), wherein the loading path (Deltax) has a variable starting point (xi), wherein the starting point (xi) of the loading path (Deltax) is defined for a closing movement of the furniture part (2) by the position of the furniture part (2) at the beginning of a closing movement from a second open position which is greater than the first open position.