Oven Door Lock with Incremental Opening for Pyrolysis Safety

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Solution Overview

Problem

Existing pyrolysis-capable baking ovens lack functionality in their door locking mechanisms, offering limited options for door positioning and operation.

Innovation Solution

A pyrolysis-capable baking oven with a door lock that includes a movable locking device with a locking hook, accommodated on a lock housing, allowing the door to be opened and closed incrementally, featuring a spring-biased hook housing, a coupler for motor-controlled movement, and switches for position detection, enabling various operational states.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the door lock uses a fixed locking mechanism, then the structure is simple, but the door cannot be opened incrementally

Engineering Contradiction:
Improvedoor positioning capabilityVSAvoidlocking device structure
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The locking device is designed to be movable between a retracted position (allowing door opening) and an extended locked position (securing the door closed). This dynamic positioning capability enables the door to be opened incrementally while maintaining structural simplicity through controlled movement rather than complex multi-component mechanisms

Inventive Principle:
Principle #15Dynamics

2Ease of operation

If the locking device is extended to lock the door, then the door is securely locked, but the door cannot be opened

Engineering Contradiction:
Improvedoor opening capabilityVSAvoidlocking security
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The locking device operates in periodic cycles between locked and unlocked states. During operation, the control unit periodically extends the locking device to secure the door, then retracts it to allow opening when needed. This periodic action ensures both secure locking when required and easy opening when the cycle calls for it

Inventive Principle:
Principle #19Periodic action

3Ease of operation

If the locking device is retracted to allow door opening, then the door can be opened, but the door is not securely locked

Engineering Contradiction:
Improvedoor opening capabilityVSAvoidlocking security
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The system incorporates switches that detect the position of the locking device and provide feedback to the control unit. This feedback mechanism ensures the door is properly locked when the locking device is extended and safely opens when retracted, maintaining both security and operational ease through automated position verification

Inventive Principle:
Principle #23Feedback

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 oven door can be easily opened and closed incrementally, providing more operational flexibility and safety features, such as automatic opening and locking, with enhanced user control and program integration.

Implementation Method 1

featuring a spring-biased hook housing

Methodology Applied
Scientific EffectSpring bias: Spring

Data Source

PatentEP3324124B1Cooking device with door lock
Publication Date: 2020.03.18 MIELE & CO KG
  • EP3324124B1 patent drawingFigure 1~4
  • EP3324124B1 patent drawingFigure 5~6
  • EP3324124B1 patent drawingFigure 7~8

AI summary

Cooking appliance (1), such as an oven capable of pyrolysis, with a lock latch (2) and with a lock latch (2) and with a door lock (3), which are each mounted on one of two opposing components (4, 5) of the cooking appliance (1), one component being designed as an appliance housing (4) and one component being designed as an appliance door (5), and the appliance door (5) being arranged such that the appliance door (5) can move relative to the appliance housing (4). The door lock (3) comprises a lock housing (6) and a locking device (7) with a locking hook (8) for holding the appliance door (5). The locking device (7) is movably accommodated on the lock housing (6) between a closed position (70) and at least one extended position (71). In the extended position (71), the appliance door (5) is open by a gap.