GFCI Reset Mechanism Assembly Efficiency
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Solution Overview
Problem
The existing reset mechanism of Ground Fault Circuit Interrupters (GFCIs) is complex and difficult to assemble, affecting efficiency and increasing production costs.
Innovation Solution
A simplified reset mechanism for GFCIs, comprising a reset button, electromagnet, slide rocker, rotary lifting block, and reset mounting bracket, with a spring support and rotating shafts for easy assembly, and a tact switch composed of a stationary and moving contact switch reed for reduced production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex reset mechanism structure is used, then the GFCI can achieve reliable reset function, but the assembly difficulty increases and assembly efficiency decreases
Solution Approach 1:
The patent combines multiple components into integrated assemblies. The lock socket and lock are pre-assembled as one unit, the electromagnet and iron core form a magnetic assembly, and the lifting slider integrates multiple functions. This merging reduces the number of separate parts and assembly steps while maintaining the reliable reset function through the coordinated operation of these integrated components.
Solution Approach 2:
The lifting slider serves multiple functions: it acts as a mechanical link, provides electrical connection through its conductive structure, and enables the reset action through its movement. The lock mechanism simultaneously provides mechanical locking and electrical circuit control. This multi-functionality reduces the total number of components needed while ensuring reliable operation.
2Reliability
If a complex reset mechanism structure is used, then the GFCI can achieve reliable reset function, but the assembly complexity increases
Solution Approach 1:
The reset mechanism is divided into distinct functional modules: the button assembly (reset button and test button), the magnetic actuation system (electromagnet and iron core), the lifting system (lifting slider and lifting block), and the locking system (lock and lock socket). Each module can be analyzed and assembled independently, reducing the perceived complexity while maintaining overall reliability through modular design.
Solution Approach 2:
The patent employs nested structures where smaller components are housed within larger ones. The iron core is nested within the electromagnet coil, the lock is nested within the lock socket, and the lifting block is nested within the lifting chute. This nesting consolidates multiple components into compact arrangements, reducing structural complexity while preserving functional reliability.
3Reliability
If a complex reset mechanism structure is used, then the GFCI can achieve reliable reset function, but the production cost increases
Solution Approach 1:
By merging components into pre-assembled units (lock socket with lock, electromagnet with iron core, lifting slider with lifting block), the patent reduces the total number of assembly operations required in production. This merging simplifies the manufacturing process, reduces labor costs, and maintains reliable reset function through the coordinated operation of integrated components.
Solution Approach 2:
The reset mechanism incorporates self-resetting features through the spring-loaded lifting block and automatic locking/unlocking actions. The electromagnet automatically actuates the iron core when powered, and the spring automatically returns the lifting block to its initial position. These self-service features reduce the need for complex control systems and manual intervention, lowering production costs while ensuring reliable operation.
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 simplified structure significantly improves assembly efficiency and reduces production costs by making the GFCI easier to assemble and manufacture.
Implementation Method 1
a lifting block spring used for resetting the rotary lifting block is disposed on one side of the lifting part of the rotary lifting block; a bottom of the lifting block spring abuts against the rotary lifting block
Implementation Method 2
a reset lever spring used for resetting the reset button is sleeved on the reset lever
Implementation Method 3
an electromagnet, a slide rocker, a rotary lifting block, and a reset mounting bracket, where a reset lever is disposed at a bottom of the reset button; the electromagnet is disposed at one side of the rocker bending part of the slide rocker
Data Source
AI summary
A reset mechanism includes: a reset button, electromagnet, and reset mounting bracket, where a rotary lifting block is movably on the bracket; lifting parts are separately at two sides of one end of the block, and a clamping hook is the other end; a lifting block spring is on one side of the lifting part of the block; a position-limiting block matched with the block is on the bracket, which has a slide rocker in a movable manner; a rocker bending part is at a tail of the slide rocker; an end part of the rocker bending part has a rocker bayonet; an iron core of the electromagnet has an iron core card slot matched with the bayonet, which is clamped to the iron core card slot; and a bottom of the reset button has a reset lever matched with one side of the clamping hook of the block.