Motorized Oven Door Sensors for Open-Close Switch Accessibility
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Solution Overview
Problem
Conventional automatic oven doors with switches located on the front surface become inconvenient for users when opening and closing heavy loads, as the switch location is no longer accessible after the door is opened.
Innovation Solution
Incorporating sensors on both the inner and outer surfaces of the oven door and enclosure, allowing users to activate the door opening and closing mechanism from various positions, with additional sensors for enhanced functionality and safety features like resistance detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a switch is located on the front surface of the oven door for automatic door opening, then it is convenient for users to activate before placing food in the oven, but it becomes inaccessible and inconvenient for users to activate after the door is opened and food is placed inside
Solution Approach 1:
The patent divides the switching function into multiple sensors located at different positions: an outer sensor on the front surface for door opening activation, and inner sensors on the inner surface for door closing activation. This segmentation allows users to access sensors at appropriate locations depending on whether the door is open or closed, resolving the accessibility contradiction.
Solution Approach 2:
The patent transitions from a single-location switch to multi-location sensors by adding the inner surface dimension. Sensors are placed on both the outer front surface and the inner surface of the door, creating multiple activation points that accommodate different operational states (door open vs. door closed), thereby solving the location flexibility issue.
2Ease of operation
If multiple sensors are disposed on the inner portion of the home appliance for enhanced functionality, then user convenience and safety are improved, but device complexity increases
Solution Approach 1:
The patent implements sensors that serve multiple functions: detecting user intent to open/close the door, monitoring door position status, and providing safety interlocks. This multi-functionality justifies the added complexity by delivering enhanced operational convenience and safety without requiring proportionally more components.
Solution Approach 2:
The sensor system automatically detects door position and user intent, triggering appropriate door movement sequences without manual intervention. The system self-regulates based on sensor inputs, reducing the need for complex control logic and manual operation while improving ease of use.
Data Source
AI summary
A home appliance that includes a power operated door includes a first sensor that is accessible to a user when the door is closed, and a second sensor that is accessible to the user when the door is open. The first sensor is used to cause the door to move from the closed position to the open position. The second sensor is used to cause the door to move from the open position to the closed position. The first sensor may be located on an exterior of the door and the second sensor may be located on an inner surface of the home appliance or on an inner surface of the door itself.