Leakage Protector Analog Voltage Timing Control
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Solution Overview
Problem
Existing leakage protectors require inconvenient and complex operation to set the power-on time, involving repeated button pressing, and have a high cost due to their complicated structure.
Innovation Solution
A leakage protector with a mechanical actuating part that allows the brush to move, enabling the first and second contact pins to contact different positions on the conducting strips, generating analog voltages that the microprocessor uses to control the power-on time, allowing for one-step setting of the power-on time and efficient timing shutdown of external power equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If repeatedly pressing a button is used to set the power-on time, then the power-on time can be set, but the operation becomes inconvenient and complex
Solution Approach 1:
The patent replaces the mechanical button-pressing system with an electronic analog voltage signaling system. The actuating part generates different analog voltages that are transmitted to the microprocessor, eliminating the need for repeated button presses and simplifying the user operation while reducing mechanical wear and structural complexity.
Solution Approach 2:
The patent changes the control parameter from discrete button presses to continuous analog voltage levels. By varying the analog voltage according to the rotation position of the actuating part, the system achieves precise power-on time setting in a single operation, improving ease of use and reducing operational steps.
2Loss of information
If a digital tube is provided to display the set power-on time, then the set time can be determined, but the cost increases
Solution Approach 1:
The patent replaces the optical digital tube display system with an electronic analog voltage transmission system. The microprocessor internally processes the analog voltage signal to determine the power-on time, eliminating the need for external display components and reducing device cost while maintaining accurate time setting capability.
3Adaptability or versatility
If the brush moves to contact different positions on the conducting strip, then different analog voltages are generated, but the structural complexity increases
Solution Approach 1:
The patent introduces the actuating part as an intermediary mechanism between the user input and the brush movement. This actuating part converts rotational motion into precise linear displacement of the brush along the conducting strip, enabling wide time setting range while maintaining simple and reliable mechanical structure with clear functional separation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a convenient and cost-effective operation for setting the power-on time, simplifying the process and reducing the complexity and cost of the device, while ensuring accurate timing shutdown of external power equipment.
Implementation Method 1
the second conducting strip is provided with a plurality of conductive areas respectively corresponding to the different analog voltages; and the second contact pin is configured to contact the plurality of conductive areas, so as to allow the second conducting strip to generate the different analog voltages corresponding to the plurality of conductive areas
Data Source
AI summary
Disclosed herein is a leakage protector, which includes a housing. A base plate and a brush are arranged in the housing. A first conducting strip and a second conducting strip spaced apart are arranged on the base plate. The brush is provided with contact pins to contact the first conducting strip and the second conducting strip, respectively. The second conducting strip can generate different analog voltages, and the first conducting strip is configured to transmit different analog voltages to a microprocessor. A user can drive the brush to move through an actuating part, and set the power-on time of the leakage protector in one step.