Deep Drawn Metallic Shell for USB Connector EMI Shielding
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Solution Overview
Problem
Conventional USB electrical plug connectors with metallic shells formed through bending often develop cracks, leading to undesirable shielding effects, resulting in electromagnetic interference (EMI) and radio frequency interference (RFI), and poor structural strength.
Innovation Solution
The electrical plug connector features a metallic shell formed using a deep drawing technique to create a seamless hollow shell, eliminating cracks and enhancing shielding performance, with 180-degree symmetrical pin-assignments allowing dual orientation insertion and electrical connection to a circuit board for improved EMI and RFI mitigation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a metallic shell is formed through a bending process, then the manufacturing process is simple, but cracks are formed on the metallic shell resulting in poor shielding effect
Solution Approach 1:
The patent changes the manufacturing method from bending process to deep drawing process. This parameter change in the forming technique eliminates crack formation while maintaining manufacturing efficiency, thereby resolving the contradiction between ease of manufacture and shielding reliability.
Solution Approach 2:
The patent replaces the bending mechanical process with a deep drawing mechanical process. This substitution of mechanical forming methods eliminates the crack-induced shielding problems while keeping the manufacturing process straightforward and efficient.
2Ease of manufacture
If a metallic shell is formed through a bending process, then the manufacturing process is simple, but structural strength is poor
Solution Approach 1:
The patent changes the forming process parameter from bending to deep drawing. This parameter change produces a seamless metallic shell with improved structural integrity and strength, while maintaining manufacturing simplicity through the deep drawing technique.
3Ease of manufacture
If cracks are present on the metallic shell, then manufacturing is easier, but electromagnetic interference and radio frequency interference occur
Solution Approach 1:
The patent changes the manufacturing parameter from bending to deep drawing, which eliminates crack formation. This resolves the contradiction by producing a continuous, crack-free metallic shell that effectively shields against EMI and RFI while remaining manufacturable.
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 reduces EMI and RFI, enhances structural strength, and allows for flexible orientation during insertion, ensuring reliable signal transmission and improved user experience.
Implementation Method 1
the metallic shell encloses the insulated housing to provide a shielding effect for signal transmission
Implementation Method 2
The front case body is formed at a front side of the rear case body by deep drawing technique
Data Source
AI summary
An electrical plug connector includes an insulated housing, and a metallic shell. The insulated housing includes a base member, an upper portion, a lower portion and a mating room between the upper portion and the lower portion. The base member includes a plurality of recessed portions. The upper and lower portions are extending from one side of the base member. The metallic shell encloses the insulated housing, and the metallic shell includes a rear case body and a front case body. The base member is inside the rear case body. The front case body is drawn from the rear case body to be formed at a front side of the rear case body. The front case body protrudes from the front side of the rear case body. The front case body defines a receiving cavity therein to dispose the upper portion and the lower portion.