Drawer extraction guide
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Solution Overview
Problem
Existing drawer extraction guides face challenges with complex and expensive production due to the need for different supporting means for varying drawer extraction lengths, leading to potential slippage and limited design freedom, as well as restricted freedom in arranging synchronization components.
Innovation Solution
A synchronization device with coupled wheel sets and a transfer member that allows for adjustable synchronization between the corpus rail, center rail, and drawer rail, enabling flexible adaptation to different extraction lengths and compact design, while maintaining synchronized movement without direct load transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different supporting means are provided for different extraction lengths, then the drawer extraction guide can accommodate various drawer sizes, but the production becomes complex and expensive
Solution Approach 1:
The patent applies universality by designing a single standardized carriage structure that can be used across all drawer extraction lengths. The synchronization means and supporting means are made interchangeable and applicable to multiple configurations, eliminating the need to produce different supporting means for different extraction lengths while maintaining adaptability through the modular rail system.
Solution Approach 2:
The patent segments the drawer extraction guide into modular components: standardized carriages, synchronization means, and rails of varying lengths. This segmentation allows the same carriage design to be reused across different extraction lengths by simply changing the rail length, thereby reducing production complexity while maintaining versatility.
2Reliability
If the base bodies of supporting means extend along the entire length of the required movement range, then the full movement range is supported, but the production becomes more expensive and complex
Solution Approach 1:
The supporting function is segmented between the carriage base bodies and the rails. The carriage base bodies are standardized and do not need to extend along the entire movement range, as the rails provide the structural support and guidance over the full length. This segmentation reduces carriage complexity while maintaining full support coverage.
Solution Approach 2:
The rails act as intermediaries between the carriage base bodies and the furniture corpus. Instead of requiring the carriage base bodies to span the entire movement range, the rails provide the necessary support and guidance functions, allowing simplified carriage designs while maintaining reliability across the full extraction range.
3Reliability
If synchronization means are added between extraction rail and corpus rail, then slippage is prevented, but the device complexity increases
Solution Approach 1:
The patent merges the synchronization function with the existing supporting means by integrating synchronization wheels into the carriage structures that already provide load support. This combining of functions eliminates the need for separate synchronization devices between the extraction rail and corpus rail, preventing slippage while minimizing additional complexity.
Solution Approach 2:
The carriages are designed with dual functionality: they provide both load support and synchronization. The synchronization wheels are integrated into the universal carriage design, allowing the same carriage structure to perform multiple functions across different rail configurations without requiring additional specialized components.
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
Enables easy adjustment to various drawer extraction lengths with a compact design, reducing manufacturing costs and preventing slippage by providing a flexible and cost-effective synchronization mechanism that maintains synchronized movement between the rails and carriages.
Implementation Method 1
The synchronization device (40) comprises at least a first and a second wheel set (45, 46) with one or more synchronization wheels (41-44) that are coupled with each other
Implementation Method 2
Carriages with suitable rolling elements such as wheels or rollers may be provided between the center rail and the extraction rail
Data Source
AI summary
The invention relates to a drawer extraction guide with a corpus rail, a drawer rail, and a center rail and carriages arranged between them. It is provided that a synchronization device comprises at least a first and a second gear set with one or more synchronization wheels that are coupled with each other; that rolls a first synchronization wheel of the first gear set on one of the rails, on a component attached to the rail, on one of the carriages, or on an element attached to the carriage; that rolls a synchronization wheel of the second gear set on a further rail, on an element attached to a further rail, on a further carriage, or on an element attached to a further carriage; the synchronization device comprising a transfer member that is linearly and freely adjustable relative to the corpus rail, the center rail, the drawer rail, and the gear sets; and that one synchronization wheel of the first and the second gear set each roll on the transfer member. The invention allows for a compact configuration of a drawer extraction guide that is synchronized in its movement.