Current Leakage Protection Circuit for Power Sockets

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Current leakage between electronic devices and power supplies can cause electrical shocks when users accidentally touch the metal shell, as existing technologies fail to effectively prevent such leakage.

Innovation Solution

A current leakage protection circuit is introduced, comprising AC input and output terminals, a current leakage detection terminal, and switch circuits controlled by a control circuit that disconnects power when leakage is detected, using a charging unit, switch controller, and reset member to manage power supply and re-establish connections when safe.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If power is continuously supplied to electronic devices, then normal operation is maintained, but current leakage may occur causing electrical shock hazards

Engineering Contradiction:

Improveuser safetyVSAvoidelectrical shock hazard

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The protection circuit performs preliminary detection of current leakage through the detection terminal before hazardous levels are reached. The control circuit is pre-configured to immediately disconnect power through the switch circuit upon detecting leakage current, preventing electrical shock hazards before they can affect users

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The protection circuit acts as an intermediary between the power supply and the electronic device. It monitors the electrical connection and intervenes by disconnecting the circuit when current leakage is detected, mediating between continuous power supply needs and safety requirements

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If a current leakage protection circuit is added, then user safety is improved, but device complexity increases

Engineering Contradiction:

Improvecurrent leakage protectionVSAvoidcircuit structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The protection circuit combines multiple functions into a single integrated module: the detection terminal monitors leakage current, the control circuit processes the detection signal, and the switch circuit executes power disconnection. This merged structure provides comprehensive protection while minimizing the increase in overall device complexity

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The protection circuit is self-monitoring and self-actuating. The detection terminal continuously monitors for leakage conditions, and upon detection, the control circuit automatically triggers the switch circuit to disconnect power without requiring external intervention or complex control systems

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS8797696B2Current leakage protection circuit, power socket and electronic device using same

Publication Date: 2014.08.05 FU TAI HUA IND SHENZHEN

AI summary

A current leakage protection circuit includes a first input terminal, a second input terminal for receiving a power voltage and a current leakage detection terminal configured for detecting a current leakage from an electronic device. A control circuit of the current leakage protection circuit is configured for providing a control signal to control a first switch circuit to switch off a first connection between the first input terminal and a first output terminal and to control a second switch circuit to switch off a second connection between the second input terminal and a second output terminal when the current leakage detection terminal detects current leakage of the electronic device.