2-Prong Adapter Grounding Wing Plate for Leakage Current Reduction
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Solution Overview
Problem
2-prong power adapters face challenges in reducing leakage current and electromagnetic noise without protective grounding, as they often lack sufficient space for high-performance transformers and EL boards, limiting their effectiveness in slim designs.
Innovation Solution
A 2-prong adapter design that implements protective grounding through a rotating wing plate, which contacts a grounding terminal when inserted into an outlet, utilizing a housing, pins, a switch, a main shaft, an elastic body, and an arm to ensure effective grounding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a 3-prong adapter is used to implement protective grounding, then leakage current and electromagnetic noise are reduced, but the volume increases and portability deteriorates
Solution Approach 1:
The adapter employs a rotatable wing plate that can dynamically change its position between a first position (contacting the grounding terminal) and a second position (not contacting). This dynamic mechanism allows the adapter to achieve protective grounding capability when needed while maintaining a compact form factor, resolving the contradiction between reliability and volume.
2Ease of operation
If a 2-prong adapter with slim design is used, then portability and user convenience are improved, but protective grounding cannot be implemented and leakage current increases
Solution Approach 1:
The rotatable wing plate mechanism enables the slim 2-prong adapter to dynamically achieve grounding contact when inserted into an outlet with a grounding terminal. The wing plate rotates to a first position to contact the grounding terminal, allowing the adapter to reduce leakage current while maintaining its compact, user-friendly design.
3Object-generated harmful factors
If a high-performance transformer is used to reduce leakage current in a 2-prong adapter, then electromagnetic noise is reduced, but the cost increases excessively
Solution Approach 1:
The patent extracts the grounding function from the main body of the adapter and implements it through a separate, simple rotatable wing plate mechanism. This approach eliminates the need for expensive high-performance transformers while still achieving the goal of reducing electromagnetic noise and leakage current, thereby resolving the contradiction between harmful factors and manufacturing cost.
4Reliability
If a high-performance transformer is used to reduce leakage current, then protective grounding effect is achieved, but the adapter volume increases due to insufficient space
Solution Approach 1:
The grounding function is extracted and implemented through a simple rotatable wing plate mechanism rather than a bulky high-performance transformer. This extraction allows the adapter to achieve leakage current reduction and protective grounding effects while maintaining a compact volume suitable for modern portable applications.
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
This design effectively reduces leakage current and electromagnetic noise while maintaining a slim form factor, enhancing user convenience and portability without excessive cost increases.
Implementation Method 1
an elastic body provided between the main shaft and the switch
Data Source
AI summary
An adapter includes a housing, a pair of pins connected to the housing, a switch connected to the housing to be translationally movable relative to the housing and including at least a portion exposed to an outside of the housing, a main shaft fixed to an inside of the housing, at least one wing plate rotatably connected to the main shaft and able to be open or closed relative to the housing, an elastic body provided between the main shaft and the switch, and at least one arm connected to the switch and pressing the wing plate by integrally moving with the switch.