Drawer pull-out guide
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Solution Overview
Problem
Conventional drawer pull-out guides require high material usage, leading to increased weight and costs, and existing standards do not address the ratio of dead weight to maximum load-bearing capacity, limiting the potential for resource-efficient designs.
Innovation Solution
The design employs a reduced material thickness of 0.5-1.0 mm metal sheets with foldovers, embossings, and tapers to create a profile that maintains stability and load-bearing capacity, allowing for a significantly lower dead weight to maximum load-bearing capacity ratio, and incorporates rolling bodies for efficient guidance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional metal sheets with standard thickness are used to produce drawer pull-out guide profiles, then the profiles have sufficient strength and stability, but the dead weight and material usage increase
Solution Approach 1:
The patent applies this principle by using thin metal sheets (0.5-1.0 mm thickness) instead of conventional thicker sheets to manufacture the profile rails. The thin sheets are formed into specific profiles with reinforcing features that maintain structural integrity while significantly reducing material usage and dead weight, directly addressing the contradiction between strength and weight.
Solution Approach 2:
The patent implements local quality by incorporating foldovers, embossings, and tapers at specific locations on the profile rails where structural reinforcement is needed. These localized features concentrate material and geometric strength where required for load-bearing capacity while keeping other areas thin and lightweight, resolving the contradiction between overall strength and minimum weight.
2Quantity of substance
If metal sheet thickness is reduced to 0.5-1.0 mm, then material usage and manufacturing costs decrease, but profile stability and load-bearing capacity may be compromised
Solution Approach 1:
The patent uses thin metal sheets (0.5-1.0 mm) as the base material, transforming them through forming processes into stable profiles. The thin film approach reduces material quantity while the profile forming and reinforcing features maintain the necessary stability, directly resolving the contradiction between material usage and profile stability.
Solution Approach 2:
The patent compensates for reduced material thickness by introducing geometric complexity in other dimensions through foldovers (creating multi-layer structures), embossings (adding surface relief), and tapers (creating angular reinforcement). These dimensional transformations maintain stability despite using less material, addressing the contradiction between material quantity and structural stability.
3Ease of manufacture
If conventional profile designs are used, then manufacturing processes are simple and well-established, but the dead weight to load-bearing capacity ratio is high and resource efficiency is low
Solution Approach 1:
The patent maintains ease of manufacture by using standard metal sheet forming processes to create thin-profile rails with superior weight-to-strength ratios. The forming processes for foldovers, embossings, and tapers are integrated into conventional manufacturing workflows, allowing simple production of lighter components and directly addressing the contradiction between manufacturing simplicity and weight reduction.
Solution Approach 2:
The patent changes key parameters including metal sheet thickness (reducing to 0.5-1.0 mm), profile geometry (adding foldovers, embossings, tapers), and material distribution (concentrating material at reinforcement locations). These parameter changes enable production of lighter rails through existing manufacturing processes, resolving the contradiction between ease of manufacture and weight reduction while improving resource efficiency.
Data Source
AI summary
A drawer pull-out guide for movably supporting a drawer on a furniture body includes a body rail to be secured to the furniture body, a loading rail to be connected to the drawer and movably mounted relative to the body rail in a longitudinal direction, and—optionally—a central rail arranged between the body rail and the loading rail. The drawer pull-out guide has a dead weight and a maximum load-bearing capacity, and the ratio of the dead weight of the drawer pull-out guide to the maximum load-bearing capacity of the drawer pull-out guide is less than 1 to 50, preferably less than 1 to 57, particularly preferably less than 1 to 65.