Drawer extraction guide
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Solution Overview
Problem
Existing drawer extraction guides face challenges in adjusting to different extraction lengths and often require complex and costly production due to limited design flexibility, leading to potential slippage issues during drawer operation.
Innovation Solution
A synchronization device with coupled gear sets and a transfer member that allows for linear and free adjustment relative to the rails, enabling synchronization of the center and drawer rails while allowing the same carriages to be used across varying extraction lengths, and providing a compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the base plates of the positioning means extend across the entire length of the required adjusting range, then the positioning means can accommodate different extraction lengths, but the production becomes complex and expensive
Solution Approach 1:
The positioning means is divided into a base plate and a separate adjustment mechanism with a adjusting screw and threaded bore. This segmentation allows the base plate to be a simple, inexpensive component while the adjustment mechanism provides the necessary adaptability through a compact, modular design that doesn't require extending the base plate across the entire adjusting range.
Solution Approach 2:
The positioning means incorporates an adjustable mechanism where the second positioning element can be moved along the first positioning element using a threaded connection. This dynamic adjustment capability allows the same component to accommodate various extraction lengths without requiring different base plate lengths, thereby simplifying production while maintaining versatility.
2Ease of operation
If the force is applied through the extraction rail connected by positioning means, then the drawer can be opened and closed, but slippage between the rails occurs
Solution Approach 1:
The synchronization means is pre-installed on the center rail and engages with the positioning means before the drawer operation begins. This preliminary engagement ensures that the synchronization mechanism is ready to prevent slippage from the outset, maintaining reliable force transmission during drawer opening and closing operations.
Solution Approach 2:
The synchronization means acts as an intermediary between the extraction rail and the center rail, providing a positive mechanical engagement that prevents slippage. This intermediary mechanism ensures synchronized movement of the rails while maintaining reliable force transmission, eliminating the slippage issue that occurs with direct positioning means connection.
3Reliability
If an additional synchronization means is provided between the extraction rail and the corpus rail, then slippage is prevented, but the device complexity increases
Solution Approach 1:
The synchronization means is merged with the existing center rail structure, utilizing the same rail body and integrating the synchronization functionality into the existing component rather than adding a completely separate mechanism. This merging approach prevents slippage while minimizing the increase in device complexity by reusing existing structural elements.
Solution Approach 2:
The center rail is designed to serve multiple functions: it acts as both the structural support element and the synchronization element through its integrated synchronization means. This multi-functionality allows the same component to prevent slippage between both the center rail-drawer rail interface and the corpus rail-center rail interface, reducing overall device complexity while maintaining reliability.
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 different extraction lengths, reduces manufacturing costs, and maintains synchronization without slippage, even under load, through a compact and cost-effective design.
Implementation Method 1
A synchronization device with coupled gear sets and a transfer member that allows for linear and free adjustment relative to the rails, enabling synchronization of the center and drawer rails
Implementation Method 2
Drawer extraction guide for guiding a drawer (700) in a linear fashion in an extractable direction (3) in a piece of furniture, comprising a corpus rail (10), a center rail (30), and a drawer rail (70), wherein the center rail (30) and the drawer rail (70) are rollably positioned on the corpus rail (10) by means of ball bearings
Data Source
Figure 1
Figure 2~3
Figure 4~5
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.