Drawer Slide Cable Pulley Integration for Lift-Off Prevention
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Solution Overview
Problem
Existing pull-out guides for drawers require additional structural components like support rollers to prevent the drawer rail from being lifted off, which complicates installation and transportation and can lead to damage.
Innovation Solution
Integration of a cable pulley system that serves both as a synchronization mechanism and an anti-lift device, eliminating the need for additional support rollers by attaching the cable device to the drawer and cabinet rails, with a flange design that prevents lift-off without protruding components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional support rollers are mounted on the center rail to prevent drawer rail lift-off, then the drawer rail is protected from being lifted off, but the device complexity increases and installation becomes more complicated
Solution Approach 1:
The patent combines the synchronization mechanism and the anti-lift device into a single integrated cable pulley system. The cable pulley mounted on the center rail serves dual functions: synchronizing the movement of drawer rails and preventing lift-off. This eliminates the need for separate support rollers and reduces overall device complexity.
Solution Approach 2:
The cable pulley is designed as a multi-functional component that performs both synchronization and lift-off prevention. By making the center rail cable pulley universal for both purposes, the patent reduces the total number of components needed while maintaining reliable drawer rail support.
2Reliability
If additional support rollers and structural components are added to prevent drawer rail lift-off, then the drawer rail is secured against lifting, but the ease of manufacture and installation deteriorates
Solution Approach 1:
The patent merges the anti-lift function into the existing cable pulley structure, eliminating the need for separate support rollers. This integration simplifies the manufacturing process and reduces installation steps, as fewer components need to be procured, assembled, and adjusted.
Solution Approach 2:
The patent extracts the lift-off prevention function from the set of required components and integrates it into the cable pulley system. This eliminates the need for additional support rollers and simplifies both manufacturing and installation processes.
3Extent of automation
If protruding rope components are used in the pull-out guide, then the synchronization mechanism can be implemented, but the loss of substance increases due to damage risk during transport and installation
Solution Approach 1:
The patent designs the cable routing system so that the cable is nested within or protected by the rail structure during retracted positions. The cable runs through guides and channels that protect it from external damage during transport and installation, reducing the risk of substance loss.
Solution Approach 2:
The patent incorporates preliminary protective measures in the cable routing design, such as integrated cable guards and protected routing paths, before any potential damage can occur during transport or installation. This preventive approach reduces cable damage risk.
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
Simplifies installation, reduces the risk of damage during transport, and eliminates the need for extra support rollers, ensuring smooth and secure drawer operation without additional structural components.
Implementation Method 1
The synchronization mechanism has in the pull-out direction rear and front cable pulleys, both attached to the middle rail, and a self-contained cable, which rotates on the pulleys
Implementation Method 2
The cable device can be or is integrated into the drawer rail. As a result, there are fewer problems during transport due to protruding rope components and no damage to the rope device when the guide is installed by the end user
Data Source
Figure 1a~1b
Figure 2a~2b
Figure 3a~3b
AI summary
In a drawer slide (10) with a cabinet rail (12) attachable to a cabinet, with a drawer rail (14) attachable to a drawer, with a central rail (16) slidably mounted on both the cabinet and the drawer rail (12, 14) and with a synchronization mechanism (20) for synchronously moving the central rail (16) with the drawer rail (14), wherein the synchronization mechanism (20) has two pulleys (22a, 22b) attached to the central rail (16) and a cable assembly (24) guided around the pulleys (22a, 22b) and attached to both the cabinet and the drawer rail (12, 14), the drawer rail (14) according to the invention has a flange (30) which engages the pulley (22b) at the front in the extension direction (A).