Tall Cupboard Pull-Out Rail Correction for Accurate Closure
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Solution Overview
Problem
Pull-out devices for fully extending tall cabinets often experience segment displacements between guide rails, leading to incorrect closure, as existing solutions fail to effectively manage relative movements between guide rails during opening and closing.
Innovation Solution
A segment correction device with a pivotable lever and drivers featuring cam tracks is introduced, allowing for automatic correction of guide rail positions during opening and closing movements, ensuring proper closure by adjusting the relative speed between guide rails S2 and S3, with the force applied only when the self-retracting device overcomes its force, making the correction nearly imperceptible to the user.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If multiple guide rails are used for full extension, then the extension capacity is improved, but segment displacements occur between guide rails leading to incorrect closure
Solution Approach 1:
A synchronization roller is introduced as an intermediary element between the guide rails to coordinate their movements. The roller engages with multiple guide rails simultaneously, ensuring they move in unison and preventing segment displacements that would lead to incorrect closure, while still allowing the full extension capability to function.
Solution Approach 2:
The patent modifies the operational parameters of the guide rails by introducing controlled speed variations during the closing phase. The synchronization mechanism adjusts the relative speeds of individual guide rails dynamically, ensuring they converge at the correct position and time, thereby maintaining closure accuracy despite the multi-rail configuration.
2Ease of operation
If damping device is added to control movement, then the closing control is improved, but segment displacements and synchronization issues arise
Solution Approach 1:
The synchronization roller acts as a mediator between the damping device and the guide rails. It transmits the damping force uniformly across all guide rails, ensuring they decelerate and close in synchronization. This prevents the damping device from causing segment displacements while maintaining smooth closing control.
Solution Approach 2:
The damping function is segmented and distributed to each guide rail through the synchronization roller, rather than applying a single centralized damping force. This segmentation ensures each guide rail receives appropriate damping control independently, preventing synchronization issues while maintaining ease of operation.
3Reliability
If segment correction device is added, then the closure accuracy is improved, but the device complexity increases
Solution Approach 1:
The segment correction function is merged with the existing synchronization roller mechanism. The same roller that synchronizes guide rail movements also performs segment correction by maintaining continuous contact and coordination between rails throughout the closing process. This eliminates the need for separate correction devices, reducing overall complexity while improving closure accuracy.
Solution Approach 2:
The synchronization roller is designed to perform multiple functions simultaneously: it synchronizes guide rail movements, prevents segment displacements, and corrects positioning errors. This multi-functionality reduces the need for additional dedicated correction devices, thereby improving closure accuracy without proportionally increasing device complexity.
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 segment correction device ensures correct closure of the pull-out device by automatically adjusting guide rail positions, reducing forces needed for correction and relieving synchronous wheels, while being designed to be effective only during opening and only when segment displacements occur, thus maintaining smooth operation and user experience.
Implementation Method 1
a segment correction device having a pivotable lever and driver is provided between the guide rail S1 and the guide rail S2 and the guide rail S3, in that the lever of the segment correction device has at least two cam tracks contact surfaces is provided that in the course of the opening and/or closing movement a driver of the guide rail S2 can be coupled to the curved track of one contact surface and the curved path of the other contact surface can be coupled to the driver of the guide rail, with the relative speed of the Guide rail S2 relative to the guide rail S3 can be changed
Data Source
Figure 1
Figure 2~3
Figure 4~7
AI summary
The extraction device has multiple guide rails attached to each other. A segment adjustment device (13) having a pivoting lever (14) and a carrier is provided between the guide rails. The lever of the segment adjustment device is provided with two contact surfaces formed as curved paths. The relative speed of the guiderail is changeable against the guiderail over the contact surface of the lever.