Connecting device and drawer comprising a connecting device

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Solution Overview

Problem

Existing drawer assembly methods are inefficient and costly due to the complexity of connection types and the need for tools, particularly in forming stable connections between wall elements without visible additional components.

Innovation Solution

A connecting element with bendable locking sections that can be anchored on the end face and surface sides of wall elements, allowing for a universal, tool-free assembly of drawer elements, providing a stable and aesthetically integrated connection system.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional connection types are used for drawer wall elements, then stable connections can be achieved, but the assembly process becomes complex and requires tools

Engineering Contradiction:
Improveconnection stabilityVSAvoidassembly complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The connecting element is designed with bendable locking sections that automatically engage with counter sections on the wall elements during assembly. The elastic deformation of the locking sections provides self-locking functionality without requiring tools or additional fastening operations, making the connection system self-service and tool-free while maintaining stability

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The locking sections are designed to change their physical state through elastic deformation. During assembly, the locking sections are bent elastically to engage with the wall elements, and this parameter change (elastic deformation) enables automatic locking and stable connection without complex assembly procedures or tools

Inventive Principle:
Principle #35Parameter changes

2Adaptability or versatility

If multiple different connection types are used for various drawer components, then specific connection needs can be met, but manufacturing costs and assembly time increase

Engineering Contradiction:
Improveconnection adaptabilityVSAvoidassembly speed
Core Design Contradiction:
Adaptability or versatilityVSProductivity

Solution Approach 1:

A single connecting element design with bendable locking sections is used universally for connecting all wall elements (front wall, rear wall, side walls) of the drawer. This universal connecting element can adapt to different wall element configurations and connection positions, eliminating the need for multiple specialized connection types while significantly improving assembly speed and productivity

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Reliability

If visible connection components are used to ensure stable connections, then connection reliability is improved, but the aesthetic appearance of the drawer is compromised

Engineering Contradiction:
Improveconnection reliabilityVSAvoidaesthetic appearance
Core Design Contradiction:
ReliabilityVSShape

Solution Approach 1:

The connecting element is strategically positioned and designed to be hidden within the drawer structure, taking out the visible connection component from the aesthetic field. The bendable locking sections are arranged to engage with wall elements in a manner that conceals the connection mechanism, ensuring both reliable connection and clean aesthetic appearance without visible hardware

Inventive Principle:
Principle #2Taking out (Extraction)

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 flexible and rapid assembly of drawer elements with enhanced stability, reduced costs, and improved design aesthetics by forming a hidden connection that is easily set up and released, while ensuring precise positioning and force transmission at weak points like corners.

Implementation Method 1

a connecting element with bendable locking sections is provided for the formation of the locking connection, the connecting element being designed as a separate component in such a way that the connecting element can be anchored on an end face and on a surface side of one of the wall elements to be connected

Methodology Applied
Scientific EffectElasticity: Elasticity

Data Source

PatentEP2575544B1Connecting device and drawer comprising a connecting device
Publication Date: 2019.07.24 GRASS GMBH
  • EP2575544B1 patent drawingFigure 1~3
  • EP2575544B1 patent drawingFigure 4~8

AI summary

The invention relates to a device for connecting wall elements (2, 3) of a drawer. A detent connection can be formed, and the wall elements (2, 3) form at least one part of a drawer wall of the drawer in the connected state. The drawer wall comprises a front wall (3), a rear wall, and/or at least one lateral wall (2). According to the invention, a connecting element is provided with flexible detent portions (11, 12) to form the detent connection. The connecting element is designed as a separate component such that the connecting element can be anchored to an end face and to a surface face of one of the wall element (2, 3) to be connected.