Non-Rebound Switch Power-Off Circuit for Timed Battery Protection
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Solution Overview
Problem
Non-rebound switches lack an automatic power-off function, leading to prolonged power consumption and potential battery depletion or damage.
Innovation Solution
An automatic power off circuit is introduced, comprising a power switch circuit, trigger circuit, controller, and power on-off control circuit, which detects continuous turn-on time and automatically turns off the power supply after a preset timing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a non-rebound switch is used as a power switch, then the switch can maintain power-on state, but the circuit lacks automatic power-off function causing prolonged power consumption
Solution Approach 1:
The circuit uses a controller that continuously monitors the switch state and provides feedback control. When the switch remains in the power-on state for a predetermined time, the controller automatically activates the power-off circuit to turn off power, thus preventing prolonged power consumption while maintaining stability during normal operation.
Solution Approach 2:
The circuit is designed to automatically detect when the switch has been held in the power-on position for too long and self-correct by activating the power-off function. This eliminates the need for manual intervention and prevents energy waste without requiring additional user action.
2Device complexity
If a non-rebound switch is used without automatic power-off function, then the switch structure remains simple, but battery depletion or damage occurs due to continuous power consumption
Solution Approach 1:
The patent introduces a controller and power-off control circuit as intermediary components between the simple non-rebound switch and the power supply. These intermediaries monitor switch state and battery status, automatically cutting off power when necessary to prevent battery depletion or damage, thus protecting battery safety without fundamentally changing the simple switch structure.
3Loss of energy
If automatic power-off function is added to non-rebound switch, then power consumption is reduced, but the circuit complexity increases
Solution Approach 1:
The automatic power-off function is segmented into distinct functional modules: a switch state detection circuit, a timing/control circuit that monitors duration, and a power-off execution circuit. This segmentation allows each component to perform a specific function efficiently, reducing overall circuit complexity while achieving the power-saving goal.
4Ease of operation
If the switch remains in power-on state for extended periods, then the switch can be operated simply, but contact oxidation occurs reducing switch lifespan
Solution Approach 1:
The circuit implements preliminary protective action by automatically detecting when the switch has been in the power-on state for a predetermined time and preemptively cutting off power before contact oxidation can occur. This prevents the harmful effect of prolonged current flow on switch contacts while maintaining simple operation for the user.
Data Source
AI summary
An automatic power off circuit of a non-rebound switch includes: a power switch circuit, the non-rebound switch, a trigger circuit, a controller, and a power on-off control circuit; the trigger circuit is connected with the power switch circuit and the non-rebound switch, and configured to send a turn-on signal to the power switch circuit to turn on the power switch circuit when the non-rebound switch is turned on; the controller is connected with the power switch circuit and configured to detect continuous turn-on time of the non-rebound switch and output a turn-off signal in response to the continuous turn-on time exceeding a preset timing time; the power on-off control circuit is connected with the controller, the power switch circuit and the non-rebound switch, and configured to turn off the power switch circuit by using the turn-off signal. A problem that non-rebound switches cannot be automatically powered off can be solved.