Telescopic Drawer Guide With Symmetric Roller Support
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Solution Overview
Problem
Fully extendable telescopic guides for furniture components are inherently less rigid and require complex designs to prevent elastic deformation, especially when supporting heavy drawers, which complicates the design and reduces load-carrying capacity.
Innovation Solution
The intermediate and running rails are designed as hollow profile rails with elongated openings, featuring inner rolling surfaces and two supporting rollers on the front end of the intermediate rail, which are symmetrically arranged to distribute the drawer's weight proportionally and prevent downward deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple telescopic rail with single guide rail and single running rail is used, then the design is simple, but the load-carrying capacity is insufficient for heavy drawers
Solution Approach 1:
The telescopic guide is divided into multiple independent rails (guide rail, intermediate rail, running rail) that can be manufactured and assembled separately. Each rail is a hollow profile structure that provides structural strength while maintaining a compact design. This segmentation allows the system to handle heavy loads through distributed support points while keeping individual components manufacturable and the overall design manageable.
Solution Approach 2:
The rails are constructed as hollow profile structures combining multiple functional elements into integrated components. The hollow profile design provides both structural strength for load-bearing and space for accommodating rolling elements. This composite structure enables the guide to support heavy drawers while maintaining ease of movement through rolling contact.
2Strength
If additional supporting rollers are added to increase load-carrying capacity, then the load-bearing capacity improves, but the design complexity increases
Solution Approach 1:
Multiple supporting rollers are integrated into the existing rail structure rather than being added as separate external components. The rollers are positioned within the hollow profile of the rails, combining the support function with the structural framework. This merging approach increases load-carrying capacity through distributed support while avoiding the complexity of additional independent mechanisms.
3Ease of operation
If the drawer is fully pulled out for easy accessibility, then the content accessibility improves, but elastic deformation of the rail occurs causing faceplate displacement
Solution Approach 1:
The rail structure transitions from a simple linear telescopic mechanism to a three-dimensional hollow profile structure with multiple support points distributed in space. This dimensional enhancement provides rigidity in multiple directions, preventing elastic deformation and faceplate displacement while allowing the drawer to be fully extended for accessibility. The hollow profile geometry adds structural stability without impeding the pull-out motion.
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 configuration enhances the load-carrying capacity and stability of the telescopic guide without increasing design complexity, ensuring easy movement and symmetric weight distribution, thus preventing downward displacement of the drawer faceplate.
Implementation Method 1
rolling elements are provided which are supported in cages and which transfer the load of the extendable furniture component by way of rolling surfaces provided on the rails
Implementation Method 2
two supporting rollers are supported on the front end of the intermediate rail on axles that protrude horizontally from the opposing lateral profile legs of the intermediate rail perpendicular to the pull-out direction, with the peripheral surfaces of the supporting rollers being supported on rolling surfaces arranged on the inside of the running rail
Data Source
AI summary
A fully extendable telescopic drawer guide for furniture components that can be extended from the body of an item of furniture, with a guide rail facing the body, a running rail associated with the extendable furniture component, and an intermediate rail arranged between these two rails. Rolling elements are provided which are supported in cages and transfer the load of the extendable furniture component by way of rolling surfaces disposed on the rails. At least one rotatably supported supporting roller for the running rail is provided on the front end of the intermediate rail. The intermediate rail is implemented as a profile rail which encompasses the region of the guide rail provided with the rolling surfaces and which has on the bottom side an elongated opening for insertion of the support region of the guide rail to be secured to the body wall of an associated item of furniture.