Appliance latch assembly
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Solution Overview
Problem
Existing cooking appliance latch assemblies do not effectively secure the door in a closed position during high-heat cycles, potentially leading to safety issues and inefficient operation.
Innovation Solution
A latch assembly with a latch member operable between engaged and disengaged positions, a cover plate that moves between obstructed and unobstructed positions, and a proximity sensor to ensure the door is closed before initiating high-heat cycles, ensuring secure coupling and preventing operation if the door is open.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a latch assembly is used to secure the door during high-heat cycles, then safety and operational reliability are improved, but the device complexity increases due to additional components like latch members, cover plates, and proximity sensors
Solution Approach 1:
The latch assembly is divided into separate functional components: a latch member for securing the door, a cover plate for aesthetic coverage, and a proximity sensor for detection. This segmentation allows each component to perform its specific function independently, improving overall reliability while maintaining manageable complexity through modular design.
Solution Approach 2:
The proximity sensor detects the door position before the high-heat cycle initiates, allowing the control system to prevent operation if the door is not properly closed. This preliminary detection action ensures safety before the main heating process begins, avoiding potential hazards.
2Shape
If a cover plate is added to obstruct the latch opening when disengaged, then aesthetic appearance is improved, but the device complexity increases
Solution Approach 1:
The cover plate serves multiple functions: it provides aesthetic coverage for the latch opening when the latch is disengaged, and it acts as a mechanical interface that the latch member engages with to secure the door. This multi-functionality reduces the need for separate components, maintaining a balance between appearance and complexity.
Solution Approach 2:
The cover plate is integrated with the front panel structure, combining the aesthetic function with the mechanical function of the latch assembly. The latch member directly interacts with the cover plate, merging the security mechanism and the cosmetic element into a unified design.
3Reliability
If a proximity sensor is used to detect door position, then operational safety is improved, but the use of energy increases
Solution Approach 1:
The proximity sensor operates periodically to detect door position only when needed - specifically before initiating a high-heat cycle. The sensor is not continuously active but is triggered by the control system at appropriate moments, reducing overall energy consumption while maintaining safety requirements.
Solution Approach 2:
The proximity sensor provides feedback to the control system about the door position, enabling the controller to make informed decisions about whether to permit high-heat operation. This feedback mechanism ensures safety while allowing the system to remain energy-efficient by only activating the sensor when decision-making is required.
Data Source
AI summary
A latch assembly for an appliance includes a cabinet having a front panel with a latch opening. A latch member is aligned with the latch opening of the front panel and is movable between an engaged position and a disengaged position. A door is hingedly coupled to the cabinet between open and closed positions and has a latch receiving aperture. A cover plate is configured to selectively cover the latch opening. The cover plate is rotatably coupled with the cabinet between first and second positions.