Dual-Trigger Push-Button Switch for AC-DC Power Supply Safety
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Solution Overview
Problem
Conventional output-switch control systems for AC-DC power supplies risk user safety due to poor contact or fatigue in switches, leading to improper high-voltage switch control and potential electric shocks.
Innovation Solution
The proposed output-switch control system employs a push-button switch with dual triggers and spring members forming a self-return button, and a detecting circuit with two contacts that initially form an open-circuit state, using dual-transition signal certification to safely control the output switch by outputting power-source-on and power-source-off signals based on circuit state transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single contact switch is used to control high-voltage output, then the device complexity is reduced, but the reliability of switch control deteriorates due to poor contact or fatigue
Solution Approach 1:
The patent divides the single switch control function into two separate contact switches working in parallel. Each contact switch independently controls the high-voltage output, so that if one switch fails due to poor contact or fatigue, the other switch can still maintain proper control, thereby improving reliability while keeping the overall structure relatively simple
Solution Approach 2:
The patent implements a backup mechanism where two contact switches are configured in parallel to provide redundant control paths. This beforehand cushioning ensures that if one switch fails, the system can still function properly, preventing catastrophic failure and ensuring user safety
2Reliability
If dual contact switches are used to improve reliability, then the reliability of switch control is improved, but the device complexity increases
Solution Approach 1:
The two contact switches are designed to perform the same control function in parallel, providing universal functionality. This allows the system to achieve improved reliability through redundancy while maintaining a relatively simple and symmetrical structure, as both switches serve identical purposes and can be interchangeably configured
3Ease of operation
If contact switches are used for simple control, then the ease of operation is maintained, but safety risks increase due to potential contact failure
Solution Approach 1:
The patent implements a backup mechanism where two contact switches are configured in parallel to provide redundant control paths. This beforehand cushioning ensures that if one switch fails, the system can still function properly, preventing catastrophic failure and ensuring user safety
Solution Approach 2:
The detecting circuit monitors the state of both contact switches and provides feedback to ensure proper operation. This feedback mechanism detects any abnormal conditions such as poor contact or switch fatigue, allowing the system to respond appropriately and prevent harmful outcomes
Data Source
AI summary
An output-switch control system for an AC-DC power supply includes a push-button switch that has two triggers. The triggers correspond to different contacts of a detecting circuit, respectively. When the push-button switch is pressed to make the triggers and the contacts turn into a close-circuit state form an open-circuit state, the detecting circuit outputs a power-source-on signal, and when the push-button switch is pressed again, and either of the triggers and the contact turn into the close-circuit state form the open-circuit state, the detecting circuit outputs a power-source-off signal immediately. With the dual-transition signal certification at the contacts, safe output-switch control can be achieved, so as to provide a user with operational safety.