Pull-Out Guide Blocking Mechanism for Correct Drawer Latching
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Solution Overview
Problem
Existing pull-out guides often result in undesired ejection of the ejection device and incorrect engagement of the movable furniture part on the drawer rail, as the drawer rail moves into the overpressing position before the furniture part is properly latched, leading to premature triggering of the ejection device.
Innovation Solution
A pull-out guide with a blocking device that prevents the flexible stop from moving into the overpressing position until the furniture part is correctly locked, featuring a release device that moves the blocking device from a blocked to a released position when the furniture part reaches the end stop, ensuring proper latching before allowing the overpressing movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the stop is made flexible to allow overpressing movement, then the ejection device can be triggered, but the stop may move prematurely before correct latching is achieved
Solution Approach 1:
The blocking device is pre-positioned to restrict the flexible stop during the latching process. The blocking device only moves away after the furniture part has been correctly latched, ensuring that the flexible stop cannot move prematurely. This preliminary positioning ensures precise latching before enabling the ejection function.
2Reliability
If a blocking device is added to prevent premature movement of the stop, then correct latching is ensured, but the device complexity increases
Solution Approach 1:
The blocking device is merged with the existing latching mechanism. The blocking device is moved by the same latching action that secures the furniture part, combining two functions (blocking and latching) into a coordinated sequence. The ejection device is also integrated into the existing rail structure, merging multiple functions into a unified system.
Solution Approach 2:
The blocking device serves multiple functions: it prevents premature movement of the flexible stop, ensures correct latching sequence, and coordinates with the ejection device activation. The latching mechanism simultaneously performs both the latching function and the blocking device activation function, reducing the need for separate components.
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
Prevents undesired ejection and ensures correct engagement of the furniture part on the drawer rail by maintaining the flexible stop in the closed position until proper locking is achieved, thereby preventing premature triggering of the ejection device.
Implementation Method 1
the flexible buffer (5) having a spring (10) and a stop element (11)
Data Source
Figure 1~2
Figure 3a
Figure 3b
AI summary
Pull-out guide (1) for a movable furniture part (2), comprising a first rail (3), a second rail (4) which is movably connected to the first rail (3), a flexible stop (5) which limits the movement of the first rail (3) relative to the second rail (4) at a first position (P1) which corresponds to a closed position (SS) of the first rail (3), wherein the stop (5) is movable into a second position (P2), which corresponds to an overpressure position (ÜS) of the first rail, as a function of a closing force exerted on the first rail (3), and a blocking device (6) by which the movement of the stop (5) into the second position (P2) can be blocked.