Device for opening and closing a movable furniture part
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Solution Overview
Problem
Existing devices for opening and closing movable furniture parts, such as drawers, can experience unintended ejection during dynamic closing due to rebound effects and are prone to component damage from excess energy, and lack a reliable emergency opening mechanism without activating the touch-latch function.
Innovation Solution
A device with a resiliently mounted ejector part using a compression spring that absorbs excess energy and allows for easy detachment during emergency opening, preventing component separation and rebound effects by supporting the ejector part on a base part in the closing direction and mounting it resiliently in the opening direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ejection unit is locked during dynamic closing, then the drawer can be securely closed, but component damage may occur from excess energy and inertia
Solution Approach 1:
The patent applies beforehand cushioning by introducing a damping element that absorbs excess energy before it can damage components. The damping element is pre-positioned in the ejection unit to cushion against unintended ejection forces during dynamic closing, preventing component damage while maintaining secure locking.
2Speed
If the drawer is closed with more energy than necessary, then the closing speed is improved, but components may be demolished from excess energy and inertia
Solution Approach 1:
The patent converts the harmful excess energy into a beneficial damping effect. The damping element is designed to absorb and dissipate the excess kinetic energy from rapid closing, transforming what would be destructive force into controlled energy dissipation that protects components while allowing high closing speeds.
3Manufacturing precision
If the ejection unit uses a hard stop in the end position, then the drawer closing is precise, but rebound energy can trigger unintended ejection
Solution Approach 1:
The damping element provides beforehand cushioning at the end position, absorbing rebound energy before it can trigger unintended ejection. This maintains precise closing positioning while preventing the rebound effect that would otherwise cause reliability issues.
4Device complexity
If the ejector part is rigidly mounted, then the structure is simple, but emergency opening requires component separation which may cause damage
Solution Approach 1:
The patent applies dynamics by making the ejector part resiliently mountable rather than rigidly fixed. This allows the ejector part to move dynamically during normal operation for simple structure, but enables controlled separation during emergency opening when force is applied, facilitating easy repair and emergency access without component damage.
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 solution effectively prevents component damage from excess energy and allows for reliable emergency opening without material breakage, while absorbing rebound energy and ensuring the drawer can be opened without activating the touch-latch function, thus enhancing the reliability and safety of the device.
Implementation Method 1
The spring means comprise at least one compression spring which is supported on the one hand on the base part and on the other hand on the ejector part
Implementation Method 2
the ejector part is resiliently mounted in the opening direction by means of the spring means
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The device (11) has an ejection unit (18) which presses the movable furniture component (12) for a predetermined distance and then ejects the movable furniture component. A damper equipped with a damping device, is integrated into the ejection unit. The damper is provided for damping the closing movement of the movable furniture component, when the movable furniture component is moved into the closed position. Independent claims are included for the following: (1) movable furniture component; and (2) furniture.