Electrical Connector Port Light Indicator and EMI Shielding
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Solution Overview
Problem
Existing electrical connectors face issues with electromagnetic interference (EMI) due to leakages between plug connectors and their receptacles, which affect high-speed data transmissions and create interference with nearby devices, and they often require wave soldering that is not suitable for surface mount components.
Innovation Solution
An electrical connector design featuring a housing with press-fit terminations, port light indicators, and enhanced shielding, including internal circuit boards with signal contacts and spring elements for improved mechanical tolerance and reduced EMI, where port light indicators provide visual connection confirmation and are connected via press-fit tails through the PCB, and EMI shielding is achieved with spring fingers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If wave solder process is used for PCB assembly, then connector termination is achieved, but surface mount components on the bottom side are damaged and manufacturing complexity increases
Solution Approach 1:
The connector assembly is segmented into separate components: the connector body with contacts is assembled independently, then mounted as a complete unit to the PCB. This eliminates the need for wave soldering individual connector pins, protecting surface mount components on the bottom side while achieving secure connector termination through board-mounted connector assembly
Solution Approach 2:
The connector housing and internal contacts serve as an intermediary structure between the PCB and the external cable connection. By mounting the entire connector assembly to the PCB and having internal contacts mate with receptacles, the design eliminates direct wave soldering of delicate surface mount components while maintaining electrical connectivity
2Ease of operation
If traditional connector design without port light indicators is used, then device complexity is reduced, but connection status indication capability is lost
Solution Approach 1:
The port light indicator is merged with the connector housing structure, with the indicator integrated into the housing body and the spring element serving dual purposes as both a mechanical contact component and an electrical connection element for the indicator. This integration provides connection status indication while minimizing additional complexity
Solution Approach 2:
The spring element automatically provides both mechanical contact for electrical connection and electrical power to the port light indicator simultaneously. The same component that ensures electrical connectivity also serves to illuminate the port status, eliminating the need for separate indicator wiring and reducing overall system complexity
3Reliability
If press-fit terminations are used instead of wave soldering, then surface mount components are protected, but manufacturing precision requirements increase
Solution Approach 1:
The spring elements are pre-loaded with controlled force to provide cushioning during the press-fit insertion process. This pre-compression allows the spring to absorb insertion forces and accommodate minor misalignments, reducing the precision requirements for the press-fit operation while ensuring reliable electrical contact and protecting surface mount components
4Object-affected harmful factors
If EMI shielding is added to the connector, then electromagnetic interference is reduced, but device complexity and manufacturing cost increase
Solution Approach 1:
The spring elements serve multiple functions simultaneously: they provide mechanical contact for electrical connectivity, deliver electrical power to port light indicators, and act as EMI shielding components. By making the same components multi-functional, EMI protection is achieved without adding separate shielding structures, thereby avoiding increased device complexity
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 electromagnetic interference, ensures reliable high-speed data transmission, and avoids the need for wave soldering by using press-fit connections and flexible spring elements, while providing visual indication of electrical connection readiness.
Implementation Method 1
At least one spring element has a contact end and an opposite press-fit end. The contact end is biased against and in contact with the terminal end of the at least one port light indicator.
Data Source
AI summary
An electrical connector that includes a housing that has an interface side and a printed circuit board engagement side, and a port at said interface side. The port is adapted to receive a mating connector. The port includes a signal contact connected to an internal circuit board. The signal contact is configured to mate with a corresponding contact of the mating connector. The internal circuit board has at least one terminal with a tail end extending though the circuit board engagement side of said housing. A port light indicator is adjacent the port and has a light element facing outwardly and a terminal end. A spring element is received in the housing and has a contact end and an opposite press-fit end. The contact end is biased against the indicator terminal end and the press-fit end extends through the circuit board engagement side of the housing.