Pull-Out Guide Lateral-Guidance Adjustment for Tolerance and Stability
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Solution Overview
Problem
Conventional pull-out guides face issues with lateral stability and tolerance compatibility due to excessive lateral play, which leads to instability and increased friction, and complex adjustment mechanisms that are difficult to access and costly to implement.
Innovation Solution
A pull-out guide with an openable and closeable locking device allows for straightforward adjustment of the lateral-guidance part in the transverse direction, using a spring to retain the lateral-guidance part in a central position and a clamping mechanism to secure it, reducing lateral play to less than 0.6 mm, thereby enhancing stability and tolerance compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the guide rails are designed with large lateral play (1-3 mm) to compensate for installation deviations, then tolerance compatibility is improved, but lateral stability deteriorates and the guidance system becomes unstable
Solution Approach 1:
The lateral-guidance part is designed to be adjustable in the transverse direction, allowing the system to adapt dynamically to different installation conditions. The locking device enables the system to transition between adjustable and fixed states, optimizing both tolerance compatibility and stability.
Solution Approach 2:
The invention changes the parameter of lateral play from a fixed large value (1-3 mm) to an adjustable small value (less than 0.6 mm). By reducing and precisely controlling the lateral play through the adjustable lateral-guidance part, the system achieves both tolerance compatibility and lateral stability simultaneously.
2Adaptability or versatility
If the lateral-guidance part position is made adjustable in the transverse direction to improve tolerance compatibility, then adaptability is improved, but device complexity increases due to adjustment mechanisms
Solution Approach 1:
The locking device is designed to be operable from the front of the guide rail, allowing users to adjust and lock the lateral-guidance part position without requiring complex tools or access to hidden areas. The mechanism serves itself by using simple locking components that can be easily manipulated.
Solution Approach 2:
The adjustment and locking functionality is extracted as a separate, modular locking device that can be independently operated. This separation simplifies the overall structure by isolating the adjustment mechanism from the main guidance components.
3Stability of the object's composition
If conventional locking mechanisms are used to fix the lateral-guidance part, then position stability is improved, but ease of operation deteriorates due to difficult accessibility of adjustment elements
Solution Approach 1:
Instead of hiding the locking mechanism within the structure where it would be stable but inaccessible, the locking device is inverted to be operable from the front accessible area. This reversal of the conventional approach allows easy operation while maintaining position stability through the locking function.
4Stability of the object's composition
If the lateral play is reduced to less than 0.6 mm to improve lateral stability, then lateral stability is improved, but friction increases due to reduced clearance
Solution Approach 1:
The invention optimizes the lateral play parameter to a specific range (less than 0.6 mm) that balances stability and friction. By precisely controlling this parameter rather than using either large or zero clearance, the system achieves improved lateral stability while minimizing excessive friction through optimized contact conditions.
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 provides improved lateral stability and reduced friction, allowing for efficient operation and easy adjustment of the pull-out guide, while minimizing the complexity and cost of the adjustment mechanism.
Implementation Method 1
using a spring to retain the lateral-guidance part in a central position
Implementation Method 2
a clamping mechanism to secure it, reducing lateral play to less than 0.6 mm
Data Source
AI summary
A pull-out guide for pulling a pull-out furniture part out of a basic furniture structure, having at least a first and second guide rails, displaceable relative to one another in and counter to the pull-out direction. The first guide rail has a basic profile and at least one lateral-guidance unit retained on the basic profile and has a lateral-guidance part. The lateral-guidance part, which limits play of the second guide rail relative to the first guide rail in at least a transverse direction extending at right angles to the pull-out direction, interacts with a lateral-guidance surface of the second guide rail. The lateral-guidance unit has an openable and closeable locking device which, in an open state, allows adjustment of the lateral-guidance part in the transverse direction relative to the basic profile of the first guide rail by applying pressure on the lateral-guidance part parallel to the transverse direction, and in a closed state of the locking device, fixes the position of the lateral-guidance part.