Fastening fitting for a drawer front on an open side of a drawer
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Solution Overview
Problem
Existing fastening fittings for drawer facings lack adjustable and lockable vertical and horizontal alignment options, making it difficult to precisely align the facing within the furniture carcass, which affects the appearance and functionality of the drawer.
Innovation Solution
The fastening fitting includes front fixation units with wooden casing adapters, a separate housing, and masking caps, allowing for adjustable vertical and lateral positioning of the facing, with rotatable tuck bars and adjustable support plates for precise alignment and locking, enabling easy assembly and disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If fixed positioning of facing fittings is used, then assembly is simple, but alignment precision is insufficient
Solution Approach 1:
The patent implements dynamic adjustability by allowing the support plate to be positioned at different locations on the base plate through multiple mounting holes, and enabling the facing fitting to be adjusted vertically and horizontally relative to the drawer front. This transforms a static fixed-position system into a dynamic adjustable one, resolving the contradiction between simplicity and precision.
Solution Approach 2:
The fastening fitting is divided into separate adjustable components: a base plate fixed to the drawer front, a support plate that can be positioned on the base plate, and a facing fitting that can be adjusted on the support plate. This segmentation allows each component to be optimized independently for both ease of assembly and alignment precision.
2Manufacturing precision
If adjustable alignment mechanisms are added, then alignment precision improves, but ease of operation deteriorates
Solution Approach 1:
The base plate is pre-fixed to the drawer front with multiple mounting holes arranged in a grid pattern, providing predetermined adjustment positions. This preliminary preparation eliminates the need for complex alignment procedures during assembly, as users only need to select and insert the support plate at the desired pre-prepared position.
Solution Approach 2:
The facing fitting includes self-adjusting features such as a vertically movable support plate with locking mechanism and a horizontally adjustable facing element with positioning holes. These self-service features allow the user to easily achieve precise alignment without requiring additional tools or complex procedures.
3Adaptability or versatility
If multiple adjustment elements are provided, then adaptability improves, but device complexity increases
Solution Approach 1:
The base plate serves multiple functions: it provides a mounting surface for the support plate, establishes the reference plane for vertical adjustment, and offers multiple positioning holes for horizontal alignment. The support plate similarly provides both vertical positioning and horizontal adjustment capabilities. This multi-functionality reduces the need for separate components for each adjustment function.
Solution Approach 2:
The facing fitting employs a nested structure where the support plate is inserted into and nested within the base plate, and the facing fitting is nested on the support plate. This nesting arrangement allows multiple adjustment functions to be integrated in a compact configuration, minimizing overall complexity while maintaining full adjustability.
4Ease of operation
If adjustment elements are made accessible after assembly, then ease of operation improves, but structural integrity deteriorates
Solution Approach 1:
The adjustment mechanism is extracted as a separate, removable module (the support plate and facing fitting assembly) that can be independently accessed and adjusted without disassembling the main drawer front structure. The base plate remains firmly fixed to maintain structural integrity, while the extracted adjustable components provide accessibility for user operation.
Data Source
AI summary
A fastening fitting for a facing on an open side of a drawer having two facing fittings mounted on the back side of the facing and two connection fitting parts mounted, in the vicinity of the open face end of the drawer, on the side walls of the drawer. At least the vertical adjustment of the facing connected to the connection fitting parts is variable and lockable. The facing fittings are provided with a horizontally oriented coupling bolt spaced apart from the back side of the facing, which coupling bolts can be introduced into insertion receptacles of front fixation units that are mounted on the end of the side walls of the drawer. The front fixation units have vertical adjustment elements for varying the vertical adjustment of the insertion receptacles of the front fixation units and lateral adjustment elements for varying the horizontal lateral adjustment of the insertion receptacles of the front fixation units relative to the coupling bolts of the facing fittings. facing can be adjusted exactly in height and laterally/horizontally in a furniture carcass. The front fixation units are connectable via wooden casing adapters to wooden casing portions, which in the connected state, form the side walls of the drawer and are fixedly connected to the drawer bottom. The front fixation units are accommodated in a separate housing, and the housings are coverable by means of masking caps, which are flush with the outer cross sections of the wooden casing portions and the open face end of the drawer. The front fixation units are connected via the housings to the side edges, facing toward one another, of the drawer bottom. The vertical adjustment elements and the lateral adjustment elements are accessible via recesses in the housings.