Drawer Fitting Push-Latch Mechanism for Mobile Vehicles

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Solution Overview

Problem

Existing drawer modules in mobile vehicles, such as caravans and boats, face challenges in ease of use and secure locking, particularly during vibrations and cornering, where drawers may unintentionally open or require cumbersome locking mechanisms.

Innovation Solution

A push-latch mechanism with a trigger and actuating element allows for simultaneous locking and unlocking of multiple drawers, using a spring-loaded mechanism and adjustable locking parts to ensure secure and convenient operation, with a design that includes a contact piece and support section for stability and vibration resistance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If individual hook latches are used for each drawer, then secure locking against vibrations is achieved, but ease of operation deteriorates due to requiring multiple separate locking actions

Engineering Contradiction:
Improvesecure lockingVSAvoidease of operation
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

Multiple individual hook latches are merged into a single integrated locking mechanism. The invention combines several locking parts (first, second, third locking parts) into one unified locking element that can simultaneously secure multiple drawers, eliminating the need for separate locking actions for each drawer while maintaining secure locking against vibrations.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The locking element is designed with multi-functionality to perform multiple locking operations. A single locking element can engage with multiple locking parts corresponding to different drawers, allowing one actuating element to control the locking state of multiple drawers simultaneously, thus improving ease of operation without compromising security.

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

2Reliability

If multiple drawers are locked individually, then secure fixation is achieved, but device complexity increases due to multiple separate locking mechanisms

Engineering Contradiction:
Improvesecure fixationVSAvoiddevice complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The invention merges multiple separate locking mechanisms into a single integrated locking element. Instead of having independent locking mechanisms for each drawer, the locking element contains multiple locking parts that can simultaneously engage with corresponding locking parts on different drawers, significantly reducing device complexity while maintaining secure fixation.

Inventive Principle:
Principle #5Merging (Combining)

3Ease of operation

If a push-latch mechanism is used for simultaneous locking, then ease of operation is improved, but reliability may deteriorate due to potential unintentional opening from vibrations

Engineering Contradiction:
Improveease of operationVSAvoidreliability
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The locking element incorporates multiple locking parts at different locations, each corresponding to a specific drawer. This local differentiation ensures that vibrations affecting one drawer do not automatically trigger opening of other drawers, as each locking part independently secures its corresponding drawer while maintaining the overall reliability of the system.

Inventive Principle:
Principle #3Local quality

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 solution significantly enhances ease of use by allowing multiple drawers to be locked or unlocked with a single action, ensuring secure fixation against unintentional opening and providing a natural closing movement for high operating convenience, while being robust against vibrations.

Implementation Method 1

it can be provided that the actuating element has a spring that holds the actuating part in a spring-preloaded manner

Methodology Applied
Scientific EffectSpring mechanism: Spring

Data Source

PatentEP2843164B1Fitting for a drawer module of a mobile vehicle
Publication Date: 2017.10.04 KARL SIMON GMBH & CO KG
  • EP2843164B1 patent drawingFigure 1
  • EP2843164B1 patent drawingFigure 2
  • EP2843164B1 patent drawingFigure 3

AI summary

The invention relates to a fitting for a drawer module of a mobile vehicle, comprising a locking element with locking parts corresponding to the number of drawers to be locked. An actuating element allows for the adjustment of a trigger, which acts on a switching element to adjust at least two of the locking parts between a locked and an open position. The trigger is coupled to a control element and is locked in the switching position corresponding to the locked position of the locking element by means of a push-latch mechanism. Such a fitting significantly improves user comfort.