Drawer Frame Bottom Fixing With Punched Tabs for Variable Thickness
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Solution Overview
Problem
Existing drawer frame mounting systems are structurally complex and require grooves in the drawer bottom, making it difficult to securely attach drawer bottoms of varying thicknesses without additional spacers or complex manufacturing processes.
Innovation Solution
A drawer frame with a metal lateral horizontal support featuring punched-out areas that can be slid onto a non-punched part to press the drawer bottom against a lip, using tabs or bridges to compensate for manufacturing tolerances and accommodate different thicknesses, with optional claws for secure fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If tabs are punched out of the horizontal support to press the drawer bottom against the lip, then the drawer bottom can be held securely, but the structure becomes complex and requires grooves in the drawer bottom
Solution Approach 1:
The invention extracts the mounting function from the drawer bottom by providing all necessary mounting features (tabs, grooves, lips) on the drawer frame itself. The drawer bottom becomes a simple panel that rests on the lip and is secured by tabs punched from the horizontal support, eliminating the need for grooves or complex features in the drawer bottom.
Solution Approach 2:
Instead of providing mounting features on the drawer bottom (as in conventional designs), the invention inverts the approach by providing all mounting features on the drawer frame. The tabs are punched from the support and bend to press against the drawer bottom, reversing which component carries the mounting complexity.
2Adaptability or versatility
If the drawer bottom thickness varies, then different drawer bottoms can be used, but the mounting becomes difficult without additional spacers or complex processes
Solution Approach 1:
The tabs are designed as dynamic elements that can bend and deform during installation. When the tabs are punched from the support, they are initially flat, but they can be bent back to create a pressing action against the drawer bottom. This dynamic behavior allows the same tab structure to accommodate drawer bottoms of varying thicknesses without requiring precise pre-adjustment.
Solution Approach 2:
The invention changes the physical state of the tabs from flat (during installation) to bent/curved (during operation). The tabs are punched in a flat state, allowing easy installation, then bent back to create the pressing force needed to secure the drawer bottom. This parameter change in the tab shape allows accommodation of different drawer bottom thicknesses while maintaining ease of manufacture.
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, secure attachment of drawer bottoms with varying thicknesses without the need for grooves or separate spacers, allowing for easy installation and tolerance compensation, ensuring reliable horizontal support and easy assembly.
Implementation Method 1
the punched-out area of the horizontal support (3) for supporting a drawer bottom (2) can be slid onto a non-punched-out part (9) of the support (3) in order to press the bottom of the drawer (2) against the lip (5) from below
Implementation Method 2
These tabs fixed on one side are connected to the part of the support that is not punched out via a bendable web
Implementation Method 3
the punched-out area is designed with the claws directed in the direction of the lip for fixing the drawer bottom
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A drawer frame (1) having a metal, lateral, horizontal support (3) for supporting a drawer base (2), in particular which is composed of wood or plastic, and a lip (5) which projects horizontally above the support (3) as an abutment for the drawer base (2), wherein the support (3) has at least one punched-out region for fixing the drawer base (2) to the drawer frame (1), wherein the punched-out region can be pushed onto a part (9) of the support (3) which is not punched out, in order to press the drawer base (2) against the lip (5) from below. A drawer and a method for fixing a drawer base (2) to a drawer frame (1) are also described.