Furniture Push-Out Damping Layout to Prevent Over-Press Re-Triggering
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Solution Overview
Problem
Existing drive devices for moveable furniture parts fail to prevent excessive pushing into the over-pressing position, leading to immediate triggering of the ejection device and insecure closure.
Innovation Solution
A displacement-dependent damping device with a higher damping force in the main damping region before the closed position, simulating the attainment of the closed position and preventing unwanted re-triggering, while maintaining low damping force in the over-pressing region to allow desired unlocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a damping device is provided to prevent the moveable furniture part from being pushed into the over-pressing position, then the reliability of secure closure is improved, but the device complexity increases
Solution Approach 1:
The damping force is varied as a parameter along the closing path, with a first damping region having higher damping force and a second damping region having lower damping force. This parameter change prevents over-pressing while maintaining secure closure without adding complex mechanical structures.
Solution Approach 2:
The damping path is segmented into at least two distinct damping regions: a first damping region before the closed position with higher damping force, and a second damping region in the over-pressing region with lower damping force. This segmentation allows different damping characteristics in different operational zones.
2Reliability
If a blocking element is used to prevent movement into the over-pressing position, then the reliability of secure closure is improved, but the ease of operation deteriorates
Solution Approach 1:
Instead of a rigid blocking element, the damping force parameter is adjusted spatially to create a progressive resistance that guides the furniture part to the closed position without abrupt blocking, maintaining ease of operation while ensuring secure closure.
Solution Approach 2:
The damping device provides beforehand cushioning by creating a high damping force region just before the closed position, preventing the furniture part from reaching the over-pressing position in the first place, thus eliminating the need for hard blocking elements.
3Reliability
If the damping force is increased in the main damping region to simulate attainment of closed position, then the reliability of preventing re-triggering is improved, but the force required by the operator increases
Solution Approach 1:
The damping path is divided into regions with different damping forces. The high damping force is concentrated in the first damping region just before the closed position, while the second damping region has lower force requirements, optimizing both reliability and operator effort.
Solution Approach 2:
The damping device applies excessive damping force only in the critical first damping region where it is most needed to prevent over-pressing and simulate closed position attainment, rather than applying uniform high force throughout the entire closing path.
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
Effectively inhibits the moveable furniture part from reaching the over-pressing position, ensuring secure closure and preventing immediate re-triggering of the ejection device by providing a strong damping force just before the closed position.
Implementation Method 1
a damping device (4) is provided for damping the closing movement of the moveable furniture part (2)
Data Source
AI summary
A drive device for a movable furniture part includes a lockable push-out device for pushing the movable furniture part out of a closed position into an open position. The push-out device can be unlocked by virtue of the movable furniture part being pushed into an excess-pressure position located behind the closed position, as seen in the closing direction. An excess-pressure region is located between the closed position and an excess-pressure position. The drive device also has a damping device for damping the closing movement of the movable furniture part. The damping device has displacement-dependent damping, in which the damping force in a main damping region, located in front of the closed position—as seen in the opening direction, is higher than in the excess-pressure region.