Input Means Locking Device for Household Appliance Control Protection
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Solution Overview
Problem
Household appliances lack effective protection against unintentional changes to device settings due to lack of automatic locking mechanisms for input devices, leading to potential misuse or accidental modifications.
Innovation Solution
A microcontroller-based system that automatically locks input means, such as keys or touchpads, after a predefined time, preventing unintentional user inputs, with an additional input means for manual unlocking that requires a minimum actuation time to switch the appliance on or off, and visual or acoustic signals to indicate the locking state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If automatic locking mechanism is implemented, then protection against unintentional changes is improved, but device complexity increases
Solution Approach 1:
The control device automatically locks the input means after detecting inactivity for a predefined period, eliminating the need for users to manually enable protection. The system serves itself by monitoring its own state and automatically transitioning to a locked state, thereby providing protection without requiring additional user actions or complex manual configuration mechanisms.
Solution Approach 2:
The system performs preliminary locking action by automatically securing the input means before any unintentional changes can occur. The microcontroller monitors input means activity and proactively locks the controls after the predefined time period elapses, preventing potential misuse or accidental modifications before they can happen.
2Reliability
If input means are locked, then safety against accidental inputs is improved, but ease of operation deteriorates
Solution Approach 1:
The control device dynamically transitions between unlocked and locked states based on real-time monitoring of input means activity. When activity is detected, the system remains unlocked for easy operation; when inactivity exceeds the predefined period, it automatically locks. This dynamic state change allows the system to adapt between safety and ease of operation depending on actual usage conditions.
Solution Approach 2:
The system continuously monitors input means actuation and provides feedback by automatically adjusting the locked/unlocked state. The microcontroller detects whether input means are being used and feeds this information back to the locking mechanism, creating a closed-loop control system that balances safety and operability based on actual user interaction patterns.
3Reliability
If manual unlocking is required, then security against unauthorized changes is improved, but time to restore functionality increases
Solution Approach 1:
The system provides self-service unlocking by automatically detecting when the predefined time period has elapsed and autonomously transitioning from locked to unlocked state. Users simply need to interact with the input means again, and the system automatically restores full functionality without requiring manual unlocking procedures or user intervention beyond normal operation.
Data Source
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AI summary
The invention relates to a household device (1), in particular a refrigeration device (1a), comprising an electronic control device (14) designed to control at least one function of the household device (1), an input device (11) connected to the control device (14), which has at least one input means (12), and which is designed to supply an assigned control signal to the control device (14), based on a manual actuation of the at least one input means (12), and an input means locking device (15) which, in its locked state, is designed to prevent a controlling of the function of the household device (1), despite the at least one input means (12) being actuated, and in its unlocked state, same is designed to permit a controlling of the function of the household device (1) when the at least one input means (12) is being actuated, wherein the input means locking device (15) is designed and/or intended for shifting the input means locking device (15) into the locked state, after the at least one input means (12) has not been actuated over a predefined time period.