Drawer pull-out guide for movably supporting a drawer on a furniture body
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Solution Overview
Problem
Existing drawer pull-out guides in the furniture industry face challenges in achieving material savings while maintaining high load-bearing capacity and stability, particularly in heavy furniture parts, due to limitations in reducing rail weight without compromising mechanical performance.
Innovation Solution
The introduction of embossings on the lateral surfaces of the rail, arranged orthogonally and alternatingly, enhances the profile's strength and stability, allowing for a higher degree of weight reduction without compromising the ability to support heavier furniture parts, and facilitates geometric precision during bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If thin-walled metal sheets are used to reduce rail weight, then material usage and weight are reduced, but load-bearing capacity is significantly reduced
Solution Approach 1:
The patent applies local quality by introducing embossings at specific locations on the rail profile where strength reinforcement is needed. The embossings are positioned on lateral surfaces to locally increase structural rigidity without requiring uniform wall thickness throughout the entire rail, thus maintaining load-bearing capacity while using thin-walled material overall.
Solution Approach 2:
The patent transitions from a two-dimensional thin-walled profile to a three-dimensional reinforced structure by adding embossings that protrude from the lateral surfaces. This dimensional addition creates geometric reinforcement that increases moment of inertia and section moduli without significantly increasing material usage or overall weight.
2Loss of substance
If thin-walled metal sheets are used to reduce rail weight, then material usage is reduced, but stability is reduced
Solution Approach 1:
The embossings are strategically positioned on lateral surfaces of the rail profile to provide localized stability reinforcement. This allows the majority of the rail structure to remain thin-walled for material efficiency, while critical areas gain enhanced stability through the embossed features.
Solution Approach 2:
The embossings introduce curved or rounded geometric features on the lateral surfaces of the rail. These curved structures inherently provide better structural stability and resistance to deformation compared to flat surfaces, while adding minimal material.
3Strength
If local increases in wall thickness are applied to maintain strength, then strength properties are maintained, but material saving is limited
Solution Approach 1:
Instead of increasing wall thickness in the radial direction, the patent adds embossings that extend in the longitudinal and transverse dimensions. This creates three-dimensional geometric reinforcement that significantly improves strength properties through increased moment of inertia without requiring additional material in the wall thickness direction.
Solution Approach 2:
The patent creates a composite structural system combining thin-walled metal sheet material with embossed geometric reinforcement features. This composite approach achieves high strength-to-weight ratio by integrating the base material with added structural geometry, rather than relying solely on increased material thickness.
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 design achieves a significant weight reduction of up to 426 grams in conventional rails, maintaining the same weight category of movable furniture parts, while preventing deformation and ensuring stable operation under load, with no additional components required.
Implementation Method 1
at least one embossing extending at least in areas over at least two lateral surfaces of the profile arranged substantially orthogonal to each other is arranged for reinforcing the profile of the at least one rail
Implementation Method 2
at least two embossings are provided, which are preferably arranged on at least two lateral surfaces oriented substantially orthogonal to and/or adjoining each other and/or extend over at least two lateral surfaces at least in areas
Data Source
AI summary
A drawer pull-out guide includes a body rail to be secured to a furniture body, and a drawer rail to be connected to a drawer and movably mounted relative to the body rail in a longitudinal direction. At least one of the rails has a profiled section made of a flat sheet metal and having two longitudinal edges running parallel to each other, in a cross-section normal to the longitudinal direction. An embossing extending at least partly over at least two profiled section lateral surfaces arranged substantially orthogonally to each other is provided to reinforce the profiled section of the at least one of the rails. The lateral surfaces are arranged in the longitudinal direction, and the embossing is arranged substantially orthogonal to the longitudinal direction. The embossing faces toward an outer region of the rail, and/or the rail is a storage rail, and/or at least two embossings are provided.