Electrical Component Housing Grounding Structure for Easier EMC Assembly
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Solution Overview
Problem
In electrical component housings with resin bases, earth-connecting a ground terminal to a metal portion is challenging, making assembly difficult and potentially compromising electromagnetic noise reduction.
Innovation Solution
The housing includes a resin base portion, a metal cover portion, a metal plate covering the base portion's bottom surface, and a conductive member in a through hole that connects the ground terminal of the electrical component to the metal plate, facilitating easy assembly and electromagnetic shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a resin base portion is used to mount electrical components, then the housing is lightweight and easy to process, but earth-connecting the ground terminal to the metal portion becomes difficult
Solution Approach 1:
The housing is divided into a resin base portion and a metal cover portion with a metal plate, allowing each part to serve its optimal function while simplifying the overall assembly process
Solution Approach 2:
A conductive member is introduced as an intermediary element that bridges the ground terminal and metal plate, enabling earth connection without complex wiring while maintaining the resin base structure
2Reliability
If an earth wire is used to connect the ground terminal to the metal portion, then electrical connection is achieved, but the assembly work becomes difficult
Solution Approach 1:
The earth wire is extracted from the assembly process entirely. Instead of using a wire to connect the ground terminal to the metal portion, the invention uses a conductive member that provides direct electrical contact through the housing structure itself
Solution Approach 2:
The grounding function is merged into the housing structure by integrating the conductive member within the resin base portion, combining the mechanical support and electrical connection functions into a single integrated solution
3Ease of operation
If the ground terminal is not properly earth-connected, then assembly is simpler, but electromagnetic noise reduction is compromised
Solution Approach 1:
The housing structure itself provides the earth connection path through the conductive member, eliminating the need for separate grounding wires or complex assembly steps while ensuring electromagnetic noise reduction is built into the design
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 configuration simplifies the assembly process by eliminating the need for an earth wire and reduces the risk of deteriorating electromagnetic compatibility (EMC) performance.
Implementation Method 1
the conductive member electrically connects a ground terminal of the electrical component and the metal plate
Data Source
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Figure 5A~5B
AI summary
Provided is an electrical component housing for housing an electrical component. The electrical component housing includes a resin base portion allowing the electrical component to be mounted, a metal cover portion attached to the base portion and configured to cover the electrical component, a metal plate in contact with a bottom surface of the base portion in a manner of covering the bottom surface of the base portion. The electrical component housing also includes a conductive member provided in a through hole that penetrates the base portion in a thickness direction of the base portion, wherein the conductive member electrically connects a ground terminal of the electrical component and the metal plate.