Tool-Free Drawer Rail Coupling With Elastic Snap Lock
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Solution Overview
Problem
Existing drawer designs require tools and can damage components when removing or reinserting, making self-assembly and disassembly complicated, especially in furniture where users need to manage locking mechanisms without clear guidance.
Innovation Solution
A drawer design featuring a coupling device with a resilient latching tongue that disengages by applying force perpendicular to the pull-out direction, allowing for easy removal and reinsertion without tools, using a plug-like outer coupling part and a sliding block inner part with guided surfaces to ensure secure engagement and disengagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the carrier holders are welded or riveted to the running rail, then the connection is strong and reliable, but the furniture cannot be assembled or disassembled by the buyer himself
Solution Approach 1:
The coupling device is divided into two separate coupling parts that can be independently positioned and engaged. This segmentation allows the drawer to be securely connected to the running rail while enabling easy assembly and disassembly by the buyer, resolving the contradiction between connection reliability and self-assembly capability.
Solution Approach 2:
The two coupling parts are designed to engage with each other in a nested manner, where one coupling part fits into or alongside the other. This nesting design provides a strong, reliable connection while maintaining simplicity for user assembly, as the parts naturally guide themselves into the correct position during installation.
2Reliability
If locking means are arranged on both sides of the side frames and require a tool to release, then the drawer is securely locked, but the user cannot easily remove or reinsert the drawer without tools and may damage components
Solution Approach 1:
The coupling device is designed to be operated without tools by the user themselves. The two coupling parts can be engaged and disengaged through simple manual actions, eliminating the need for external tools while maintaining secure locking during normal use. This self-service design allows easy removal and reinsertion of the drawer.
Solution Approach 2:
The coupling device transitions from a static locked state to a dynamic unlocked state through user action. The design allows the coupling parts to be firmly engaged for secure locking during operation, yet can be easily separated when the user needs to remove the drawer, providing dynamic adaptability between security and ease of removal.
3Stability of the object's composition
If the drawer is firmly fixed in the running rail, then the drawer remains stable during operation, but the drawer cannot be removed or reinserted easily
Solution Approach 1:
The coupling device is segmented into two separable parts that can be firmly engaged for stable operation yet easily separated for removal. This segmentation allows the drawer to achieve firm fixation during use while enabling simple removal and reinsertion when needed, resolving the contradiction between stability and ease of operation.
Solution Approach 2:
The coupling mechanism provides dynamic behavior, transitioning from a stable, firmly fixed state during normal drawer operation to an easily separable state when removal is required. The two coupling parts maintain firm engagement for stability but can be quickly disengaged for removal and reinsertion.
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 self-assembly and disassembly of drawers without tools, preventing damage to components and ensuring smooth operation by using a structurally simple and efficient coupling mechanism that automatically locks and unlocks the drawer.
Implementation Method 1
a resilient latching tongue (28) engaging in an opening (27) in the running rail
Implementation Method 2
applying force to the coupling device, transversely to the pull-out direction in the vertical direction upwards, so that the two parts disengage
Data Source
Figure 1
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AI summary
The invention relates to a drawer (10) comprising a drawer bottom (11), a front panel, a rear wall (15) opposing the front panel, and two lateral panels (12, 13) which extend in the direction of displacement of the drawer (10), are embodied as hollow body sections, and are provided with adapters at least in the end regions. Carrying holders (14) engaged with the runners (23) are fixed to the front adapters (16). At least one or each front-side connection between the carrying holder (14) and the runner (23) is carried out by a coupling device (17) and an elastic snap-in pin (28) engaging in an opening (27) of the runner (23). In this way, the drawer (10) can be easily removed from the piece of furniture as required.