Drawer Rail Coupling with Tool-Free Height Adjustment
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Solution Overview
Problem
Existing coupling devices for drawers require tools for height adjustment and are not adaptable to varying web heights on the drawer bottom, limiting the flexibility in assembling and disassembling drawers without damaging the furniture.
Innovation Solution
A coupling device with an adapter device that allows height adjustment relative to the drawer bottom by using a resiliently designed tab and toothing mechanism, enabling the coupling device to be attached to a side wall web, thus compensating for different web heights and allowing tool-free assembly and disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a coupling device is firmly connected to the front panel of the drawer, then the coupling device provides stable support, but the position of the front panel relative to the drawer side wall cannot be adjusted
Solution Approach 1:
The coupling device is divided into separate components: the coupling device itself and the adapter device. The adapter device is firmly connected to the drawer side wall to provide stable support, while the coupling device can be adjusted relative to the adapter device. This segmentation allows the front panel position to be adjusted independently without compromising the stability of the overall assembly.
2Device complexity
If the coupling device is directly attached to the drawer bottom, then the structure is simple, but it cannot compensate for different web heights on the drawer bottom
Solution Approach 1:
The adapter device serves as an intermediary component between the drawer bottom and the coupling device. It is firmly connected to the drawer side wall and provides an adjustable interface for the coupling device. This intermediary structure enables compensation for different web heights on the drawer bottom while maintaining overall structural simplicity.
3Measurement precision
If a turning tool is required for height adjustment of the drawer, then precise adjustment can be achieved, but the adjustment process becomes complicated and requires additional tools
Solution Approach 1:
The adapter device incorporates a self-adjusting mechanism with a resilient tab and toothing that allows the coupling device to be adjusted to different heights relative to the drawer bottom. The resilient tab can be manually pressed to release latching, allowing the coupling device to be positioned at different heights, and then automatically latches into place. This self-service mechanism eliminates the need for external turning tools while maintaining adjustment precision.
4Ease of operation
If the coupling device uses a resilient latching mechanism for automatic locking, then assembly is simplified, but the coupling device cannot provide height adjustment capability
Solution Approach 1:
The system is segmented into the coupling device with its resilient latching mechanism and the adapter device with height adjustment capability. The adapter device provides multiple predetermined latching positions through its toothing structure, while the coupling device maintains its automatic locking function. This segmentation allows both ease of assembly and height adjustment capability to coexist.
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 tool-free assembly and disassembly of drawers, prevents damage to the front panel, and allows for independent adjustment of the drawer's position relative to the side wall, ensuring secure locking and easy detachment without the need for tools.
Implementation Method 1
an adjustment part (13) which is adjustable relative thereto and which is connected to the other components of the coupling device (7)... The adjustment part has a resiliently designed tab which is adjustably mounted along a toothing of the bearing part
Implementation Method 2
latches which interact with a latching element which is designed to be resilient or acted upon by a spring
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to a coupling device (7) for detachably connecting a drawer (2) to a movable rail (5) of a drawer pull-out guide (3), wherein the coupling device (7) is to be arranged in the area of the underside of a drawer bottom (2c), wherein the coupling device (7) comprises at least one movably mounted coupling part (8) for detachably connecting the coupling device (7) to the movable rail (5) of the drawer pull-out guide (3). The coupling device (7) comprises an adapter device (11), by means of which the height position of the coupling part (8) relative to the draw bottom (2c) can be adjusted, wherein the adapter device (11) comprises a bearing part (12), which is to be fastened to the drawer (2), preferably to a web (16) projecting from the drawer bottom (2c), and furthermore an adjustment part (13) connected to the coupling part (8), the adjustment part being adjustably supported in a direction substantially at a right angle to the drawer bottom (2c) in order to adjust the height position of the coupling part (8) relative to the bearing part (12).