Conductive Power Plug Shielding EMI and Vibration
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Solution Overview
Problem
Conventional power plugs suffer from inadequate shielding against electromagnetic interference (EMI), low structural rigidity, and susceptibility to vibrations, which compromise power quality and device stability.
Innovation Solution
A power plug design featuring a conductive casing with an isolating portion and insulating layer, reducing the need for additional grounding elements and enhancing structural integrity, while using a conductive casing to shield against EMI and suppress vibrations through a conductive fixture and cable fastener system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If plastic terminal base and housing are used, then manufacturing cost is reduced, but shielding effectiveness against electromagnetic interference deteriorates
Solution Approach 1:
The patent employs a composite structure combining metal and plastic materials. The terminal base uses metal material to provide inherent electromagnetic shielding capability, while the housing uses plastic material for cost-effective insulation and structural support. This composite approach leverages the strengths of both materials: metal for EMI shielding and plastic for insulation and manufacturing efficiency, thereby resolving the contradiction between manufacturing cost and shielding effectiveness.
2Ease of manufacture
If plastic terminal base and housing are used, then manufacturing cost is reduced, but structural rigidity deteriorates
Solution Approach 1:
The patent utilizes a composite construction where the metal terminal base provides high structural rigidity and strength, while the plastic housing contributes to overall structural integrity through its insulating properties and form-stability. The metal components serve as the rigid backbone of the device, compensating for the lower rigidity of plastic parts, thus achieving both cost reduction and maintained structural strength.
3Ease of manufacture
If plastic terminal base and housing are used, then manufacturing cost is reduced, but vibration resistance deteriorates
Solution Approach 1:
The patent implements a composite design where the metal terminal base and internal components provide vibration resistance and structural stability, while the plastic housing offers damping properties and cost-effective manufacturing. The metal elements act as vibration-dampening anchors that reduce the transmission of mechanical shocks and vibrations, compensating for the lower vibration resistance of plastic components.
4Object-affected harmful factors
If additional grounding element is added, then shielding effectiveness is improved, but device complexity increases
Solution Approach 1:
The patent applies the multi-functionality principle by designing the metal terminal base to serve dual purposes: it provides both the electrical grounding function and the electromagnetic shielding function simultaneously. The metal housing structure acts as both the mechanical enclosure and the EMI shield, eliminating the need for separate grounding elements and shielding components, thereby reducing device complexity while maintaining shielding effectiveness.
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
Effectively shields electromagnetic interference, reduces vibrations, and enhances power quality and safety with a simplified and reinforced structure, improving the overall performance and lifespan of electrical devices.
Implementation Method 1
a conductive casing comprised of a casing body covering and connecting with the electrode terminal, an isolating portion disposed on the outer layer of the casing body... effectively shields against outside noise signals and electromagnetic interference via the isolating portion thereof
Implementation Method 2
a conductive fixture electrically connecting the electrode terminal base
Data Source
AI summary
A power plug is proposed, comprising: an electrode terminal base having a pair of electrically conductive terminals and a ground terminal; a power cable having insulated wires respectively connected to the conductive terminals and the ground terminal; a conductive casing comprised of a casing body covering and connecting with the electrode terminal, an isolating portion disposed on the outer layer of the casing body for isolating outside electrical noise or electromagnetic interference, an insulating layer disposed on the inner layer of the casing body, a cable fastener disposed in the casing body for holding the cable in position and a conductive fixture electrically connecting with the electrode terminal base, thereby ensuring the quality of electric power transmission.