Drawer Fixing Device with Adjustable Stop for Precise Depth Control
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Solution Overview
Problem
Existing devices for fixing push elements, such as drawers, to pull-out guides require complex alignment and limited holding forces, especially for heavy drawers, and lack precise depth adjustment capabilities.
Innovation Solution
A device with a clamping mechanism featuring a receptacle and adjustable stop for depth adjustment, combined with a self-locking clamping lever for secure fixation, allowing for compact design and precise positioning, using a knurled nut or eccentric for infinite variable adjustment and a frictionally engaged connection for stable holding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the entire receptacle is moved for depth adjustment, then the push element can be positioned in the longitudinal direction, but the adjustment device becomes complex and requires multiple mounting steps
Solution Approach 1:
The adjustment function is segmented from the receptacle movement. Instead of moving the entire receptacle, only a stop element within the receptacle is moved to control insertion depth. This separates the positioning function (stop) from the holding function (receptacle), simplifying the overall device structure while maintaining precise depth adjustment capability
Solution Approach 2:
A stop element acts as an intermediary between the adjustment device and the holding part insertion depth. The stop controls the insertion depth without requiring movement of the entire receptacle or complex alignment mechanisms, thereby simplifying the adjustment device while achieving precise depth control
2Ease of manufacture
If a plastic latching element and base part are used, then the device structure is simple, but the holding forces are limited for heavy drawers
Solution Approach 1:
The device combines plastic components (receptacle, base part) with metal components (clamping lever, holding part) to create a composite structure. The plastic parts provide structural simplicity and ease of manufacture, while the metal clamping lever provides the necessary high holding forces for heavy drawers, thus resolving the contradiction between manufacturing simplicity and strength
3Reliability
If a self-locking clamping lever with frictional engagement is used, then the holding part can be securely fixed against pulling out, but the insertion requires overcoming frictional forces
Solution Approach 1:
The clamping lever utilizes dynamic friction characteristics: during insertion, the lever is positioned to allow easier insertion with minimal friction resistance, while after insertion, the lever automatically transitions to a self-locking position where friction provides secure fixing against pulling out. This dynamic behavior resolves the contradiction between insertion ease and fixing stability
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 simple and precise alignment and secure fixing of drawers with reduced assembly steps and increased holding forces, ensuring the drawer remains in place during maximum opening, even under load, while allowing for easy insertion and stepless adjustment.
Implementation Method 1
a self-locking clamping element, in particular a self-locking clamping lever, is provided on the receptacle by means of which the holding part is frictionally secured against being pulled out
Data Source
AI summary
A device for fixing a push element, in particular a drawer box to a rail of a pull-out guide, the device comprising a clamping mechanism with a receptacle for a holding part and a device for depth adjustment for the drawer box, wherein the device for depth adjustment comprises a stop that can be adjusted either on or in the receptacle. As a result, a precise orientation of the drawer box to a pull-out guide can be achieved using simple means.