Electrical Connector Outer Shielding Member EMI Prevention
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Solution Overview
Problem
Existing electrical connection devices experience electromagnetic interference (EMI) during high-frequency transmission due to the emission of electromagnetic waves through penetrating holes in the shell, which also occupy valuable board area and lack structural strength.
Innovation Solution
An electrical connection device featuring an outer shielding member integrated with a metal shell, including first and second ground pieces that form a through hole for secure fixation to a circuit board, reducing EMI by covering openings and enhancing structural strength through a laser joint connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If soldering legs are formed by stamping from the shell, then the electrical connector can be fastened to the circuit board, but penetrating holes are created that allow electromagnetic waves to escape and cause EMI during high frequency transmission
Solution Approach 1:
The patent applies nesting by placing an outer shielding member that encloses the metal shell and contains the penetrating holes. The outer shielding member acts as a containing structure that nests the inner shell with defects, preventing EMI from escaping while preserving the fastening function of the original shell structure.
Solution Approach 2:
The patent applies local quality by providing ground pieces specifically at the locations of penetrating holes in the outer shielding member. This localized treatment addresses the EMI problem at specific critical points (the holes) without requiring complete redesign of the entire shell structure, maintaining manufacturing simplicity while solving the interference issue.
2Object-affected harmful factors
If an outer shielding member is added to prevent EMI, then electromagnetic interference is blocked, but the board area occupied by the device increases
Solution Approach 1:
The patent applies merging by integrating the outer shielding member with the metal shell through engagement structures. The two components are combined into a unified assembly that shares the same mounting footprint on the circuit board, allowing EMI shielding functionality to be added without increasing the overall board area occupation.
3Ease of manufacture
If the outer shielding member is loosely connected to the metal shell, then assembly is simple, but the structural strength and stability of the electrical connection device is reduced
Solution Approach 1:
The patent applies segmentation by dividing the connection between outer shielding member and metal shell into multiple engagement points distributed around the structure. This segmented approach provides both simplicity (modular assembly) and strength (distributed load bearing) by creating multiple localized connection zones rather than requiring a single complex connection mechanism.
Solution Approach 2:
The patent applies preliminary action by providing pre-formed engagement structures (such as protrusions or clips) on either the outer shielding member or metal shell that enable straightforward assembly. These pre-prepared connection features allow the components to be easily engaged while ensuring proper alignment and secure attachment, achieving both assembly simplicity and structural strength.
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 effectively prevents EMI during high-frequency transmission, reduces board area occupation by shared fixation, and strengthens the structural integrity of the electrical connection device.
Implementation Method 1
the outer shielding member covers the two openings and two second ground pieces... effectively prevents EMI during high-frequency transmission
Implementation Method 2
enhancing structural strength through a laser joint connection
Data Source
AI summary
An electrical connection device comprises an electrical connector. The electrical connector comprises: an insulative body; a plurality of conductive terminals provided to the insulative body; a metal shell surrounding the insulative body and an outer shielding member. The metal shell comprises a top portion, two openings respectively formed at two sides of the top portion and two first ground pieces positioned opposite to a side where the top portion is present and extending outwardly respectively from the two openings. The outer shielding member comprises a main body transversally provided on the top portion of the metal shell and covering the two openings and two second ground pieces respectively extending outwardly from two ends of the main body, the two second ground pieces each have a penetrating hole penetrating from a top surface to a bottom surface. At least a part of each penetrating hole of the two second ground pieces receives the corresponding first ground piece. By that the outer shielding member covers the two openings of the metal shell, EMI may be prevented from being produced.