Drawer Front Fastening with One-Way Locking Catch Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fastening devices for detachably attaching a front panel to a drawer side wall often fail to provide secure locking in both insertion and pull-out directions, leading to unintentional release and complex assembly processes.
Innovation Solution
A fastening device with a movable catch element and adjusting contour, where the catch element can pivot about an axis of rotation, allowing locking only in the pull-out direction, and featuring a spring-loaded pivoting lever for automatic retraction and an unlocking mechanism for intentional release, ensuring secure attachment and easy detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a spring-loaded catch element is used to automatically pull the furniture fitting towards the drawer side wall, then rapid assembly is achieved, but the furniture fitting cannot be securely locked in the pull-out direction and may be released unintentionally
Solution Approach 1:
The locking function is divided into two independent mechanisms: a spring-loaded catch element for rapid automatic locking during assembly, and a separate locking device with a locking element that provides secure prevention of unintentional release. This segmentation allows each mechanism to optimize its specific function without compromise.
Solution Approach 2:
The catch element performs preliminary automatic locking action during insertion, securing the furniture fitting to the drawer side wall. The locking device then provides an additional preliminary safety mechanism that prevents reverse movement, ensuring the fitting remains securely locked even if the catch element fails or is inadvertently released.
2Reliability
If a locking device is added to prevent unintentional release, then locking security is improved, but the device complexity increases
Solution Approach 1:
The locking device is integrated into the existing catch element structure, with the locking element and locking contour forming a unified mechanism. The locking element pivots on the same axis as the catch element, and the locking contour is formed as part of the catch element's adjusting contour, merging multiple functions into a single compact structure.
Solution Approach 2:
The catch element serves multiple functions: it provides automatic locking during assembly, enables the locking device to engage through its adjusting contour, and allows intentional release when pulled. The locking element similarly serves both to prevent unintentional release and to enable controlled unlocking, making the system multi-functional without requiring separate dedicated components for each function.
3Ease of operation
If the catch element is designed to pivot about an axis of rotation with an adjusting contour, then automatic locking is achieved, but the furniture fitting can still be pushed further in after locking
Solution Approach 1:
The adjusting contour is designed with specific local geometric features that create a jamming effect when the locking element engages. The contour includes regions with different radial distances from the pivot axis, creating zones of varying mechanical engagement. When locked, the local geometry prevents reverse movement through jamming, while still allowing forward insertion through a different geometric path.
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
The device provides secure locking in the pull-out direction while allowing further insertion, preventing unintentional release and simplifying assembly by ensuring the furniture fitting remains locked at any insertion depth, with a user-friendly unlocking process.
Implementation Method 1
When the furniture fitting is pushed in, this movable adjusting body can move automatically - e.g. by gravitation - in the guide track and slide along the adjusting contour
Implementation Method 2
WO 2009/006651 of January 15, 2009 shows a drawer side wall with a fastening device for the detachable and preferably adjustable fastening of a front panel to the drawer side wall, with a furniture fitting being pre-assembled on the front panel and with a spring-loaded catch element being arranged in the drawer side wall
Data Source
Figure 1a~1b
Figure 2a~2b
Figure 3a~3b
AI summary
Disclosed is a fastening device (1) for releasably mounting a front cover (101) on a drawer (102), in particular on a side wall (100) of the drawer, comprising: - at least one furniture fitting (2) that is pre-assembled on the front cover (101); - a catching mechanism (10) that is associated with the drawer (102), automatically retains the furniture fitting (2) when the furniture fitting (2) is inserted, and includes a movable catching element (11) having a positioning contour (12); and - a locking mechanism (20) for the catching mechanism (10), said locking mechanism (20) preventing the furniture fitting (2) from being accidentally released from the catching mechanism (10) and being equipped with a positioning member (4) which can move within a guide track (3) and rests against the positioning contour (12) of the catching element (11).