USB Type C Connector Shielding Case Bump Grounding
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Solution Overview
Problem
Existing USB connectors, particularly Type A, have limitations in power supply, with a maximum of 7.5 W, making them inadequate for charging larger devices like screen monitors and notebook computers, and suffer from electromagnetic interference (EMI) issues during signal transmission.
Innovation Solution
A USB Type C connector design featuring a shielding case with a bump for electrical connection to a grounding sheet, utilizing laser welding for enhanced electromagnetic shielding and signal reliability, incorporating a grounding sheet between the insulating main body and tongue plate, and an isolation plate to shield terminal groups from EMI.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If USB Type A connector is used for power supply, then it is compatible with existing devices, but it can only provide maximum 7.5 W power which is inadequate for larger devices
Solution Approach 1:
The patent transitions from USB Type A to USB Type C interface, changing the physical and electrical parameters of the connector to enable higher power transmission (up to 100W) while maintaining broad device compatibility through the standardized USB Type C protocol
2Speed
If USB connector transmits information at high speed, then transmission efficiency is improved, but electromagnetic radiation increases interfering with other electronic elements
Solution Approach 1:
The patent converts the harmful electromagnetic radiation into beneficial electromagnetic shielding by using metal shielding plates positioned around the terminal groups, which capture and redirect EMI away from sensitive electronic elements while allowing high-speed data transmission
3Object-affected harmful factors
If grounding method is used to reduce electromagnetic interference, then EMI is reduced, but device complexity increases
Solution Approach 1:
The patent merges the grounding function with the metal shielding plate structure, where the shielding plate simultaneously provides EMI shielding and serves as a grounding path, eliminating the need for separate grounding components and reducing overall device complexity
4Reliability
If USB Type C connector is designed with enhanced shielding, then signal reliability is improved, but manufacturing complexity increases
Solution Approach 1:
The patent uses thin metal shielding plates that can be easily formed and positioned within the connector housing, providing effective EMI shielding and grounding functionality while maintaining manufacturing simplicity through the use of thin, flexible metal components rather than complex rigid structures
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 significantly reduces electromagnetic interference, enhances signal transmission reliability, and supports higher power transmission up to 100 W, addressing the power supply limitations and EMI issues of traditional USB connectors.
Implementation Method 1
utilizing a shielding case to mutually and electrically connect with a grounding sheet through a method of laser welding
Data Source
AI summary
A universal serial bus connector includes a shielding case, an insulating main body, a first terminal group, a second terminal group and a grounding sheet. The insulating main body is accommodated and installed in the shielding case. The first terminal group is accommodated in the insulating main body. The second terminal group is accommodated in the insulating main body. The grounding sheet is fixed on the insulating main body. A surface of the shielding case has at least one bump. The bump is recessed inwards from the surface, such that the bump is electrically connected with the grounding sheet.