Drawer pull-out guide
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Solution Overview
Problem
Drawer slides with existing compensation devices face issues of increased friction, noise, and reduced closing dynamics due to misalignments, leading to drawers getting stuck open and potential collisions, as they require higher spring force and manual effort to correct misalignments during closing.
Innovation Solution
A switching device that only activates the compensation device when guide rail misalignments occur, using a movably mounted actuating element and switching element connected via a hinge axis, which disengages when the rails are correctly aligned, allowing smooth movement without interference from the compensation mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the compensation device is continuously engaged during closing movement, then misalignment correction is achieved, but friction and noise increase and closing dynamics are reduced
Solution Approach 1:
The compensation device is activated periodically only when misalignment is detected through the switching device, rather than operating continuously. The actuating element engages the compensation device only during the opening movement when misalignment occurs, and disengages during closing when rails are correctly aligned, eliminating unnecessary friction and noise while maintaining correction capability when needed.
Solution Approach 2:
The system uses the natural movement of the guide rails during opening and closing to automatically engage and disengage the compensation device through the switching mechanism. The actuating element is motionally coupled to the guide rail and automatically interacts with the stop during opening movement to activate compensation, then self-disengages during closing, requiring no external control intervention.
2Reliability
If the compensation device remains engaged during opening movement, then misalignment can be corrected, but friction increases and operation becomes less smooth
Solution Approach 1:
The compensation device operates periodically only during the opening movement when misalignment correction is needed, and remains disengaged during closing and normal operation. The switching device with actuating element automatically activates the compensation mechanism during opening when the guide rail interacts with the stop, then disengages to allow smooth operation without interference.
3Object-generated harmful factors
If the switching device disengages the actuating device when rails are correctly aligned, then friction and noise are reduced, but the compensation device may not activate in time during misalignment
Solution Approach 1:
The switching device is positioned and configured to detect misalignment before it becomes problematic during the opening movement. The actuating element is motionally coupled to the guide rail and pre-positioned to engage the compensation device through interaction with the stop at the appropriate moment during opening, ensuring timely activation. The device disengages only after correction is achieved and rails are correctly aligned.
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 ensures that misalignment corrections are made unnoticeably during the opening movement, reducing friction and noise, and maintaining smooth operation without increasing the effort required to close the drawer, thus preventing collisions and maintaining drawer alignment.
Implementation Method 1
at least one carriage with load-transmitting rolling elements, wherein the carriage is mounted to be displaceable between the at least two guide rails
Implementation Method 2
movably mounted actuating element and switching element that are connected to one another via a hinge axis
Data Source
Figure 1
Figure 2
Figure 3a~3d
AI summary
The invention relates to a drawer pullout guide (4) comprising: - at least two guide rails (9, 10, 11) which are movably mounted relative to each other, - at least one carriage (15) with load-transmitting rolling bodies (36), wherein the carriage (15) is movably mounted between the at least two guide rails (9, 10, 11), and the guide rails (9, 10, 11) assume a defined position relative to each other in the event of a movement of the at least one carriage (15) when the guide rails (9, 10, 11) have not been positioned incorrectly relative to each other, and - a compensation device (22) for compensating for an incorrect position of the guide rails (9, 10, 11) deviating from the specified relative position, said compensation device (22) having an actuation device (17) which can be actuated by one of the guide rails (9, 10, 11) and which compensates for the incorrect position upon being actuated. A switch device (27) is provided which switches the actuation device (17) of the compensation device (22) out of the engagement with the guide rails (9, 10, 11) when the guide rails (9, 10, 11) are in the defined relative positions.