USB Receptacle Connector Power Terminals for High Current
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Solution Overview
Problem
Existing USB 2.0 and 3.0 electrical connectors have insufficient power transmission speed, which cannot meet the increasing demand for rapid charging of advanced electronic devices, and their sizes can be further optimized while maintaining functionality.
Innovation Solution
A USB electrical receptacle connector design featuring a metal shell, insulation housing, upper-row, and lower-row terminals, where the power terminals have increased contact areas due to wider bodies, extending portions, and tail portions, allowing for higher current transmission up to 5 amps, and a circuit board layout that reduces space and prevents short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the contact area of power terminals is increased to enable higher current transmission, then the power transmission capability is improved, but the overall size of the connector increases
Solution Approach 1:
The power terminals are nested within the USB 3.0 connector structure, with the broader bodies, extending portions, and tail portions of power terminals positioned within the space defined by the metal shell and insulation housing. This allows the power transmission function to be integrated into the existing connector footprint without significantly increasing overall dimensions.
Solution Approach 2:
The power terminals utilize the vertical dimension by extending from the base portion through the insulation housing to the tongue portion, allowing increased contact area in the thickness direction rather than expanding the planar dimensions. The broader bodies and extending portions are arranged to maximize surface area within the available vertical space.
2Productivity
If the connector design is optimized for high current transmission, then the power delivery speed is improved, but the manufacturing complexity increases
Solution Approach 1:
The connector is segmented into distinct functional components: upper-row terminals for USB 3.0 signals, lower-row terminals for power transmission, and the insulation housing with base portion and tongue portion. Each segment can be independently manufactured and then assembled, simplifying the overall manufacturing process despite the complex functionality.
Solution Approach 2:
The connector simultaneously provides USB 3.0 signal transmission and high-current power delivery functions through integrated terminal arrangements. The lower-row terminals serve dual purposes of electrical connection and mechanical retention, while the insulation housing provides both structural support and electrical insulation, reducing the need for separate components.
3Area of stationary object
If the terminal arrangement is optimized for space reduction, then the connector size is decreased, but the risk of short circuits and capacitive effects increases
Solution Approach 1:
The insulation housing serves as an intermediary barrier between adjacent terminals, providing electrical isolation that prevents short circuits and reduces capacitive coupling. The housing material with appropriate dielectric properties acts as a mediator that allows close terminal spacing while maintaining electrical safety and signal integrity.
Data Source
AI summary
A USB electrical receptacle connector includes a metal shell, an insulation housing, upper-row terminals, and lower-row terminals. The metal shell defines a receptacle cavity therein for receiving the insulation housing. The insulation housing includes a base portion and a tongue portion extending forward from the base portion. The upper-row and lower-row terminals adjacent to the upper-row terminals are held on the insulation housing. The lower-row terminals include signal terminals and power terminals held on the insulation housing and adjacent to the signal terminals. The power terminals and the signal terminals are aligned at the same level. Each power terminal includes a second body, a second contact portion, a second extending portion, and a second tail portion. Wherein, the width of the second body, the width of the second extending portion, and the width of second tail portion are relatively greater than those of a conventional terminal.