Electrical Connector Middle Shielding Notch and Ground Terminals
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Solution Overview
Problem
Existing electrical connectors for high-frequency signal transmission often experience significant electromagnetic interference due to the arrangement of terminals, which has not been adequately addressed in current designs.
Innovation Solution
The electrical connector incorporates a middle shielding sheet and laterally protruding ground terminals that are spot-welded to an inner metal shell, forming a ground loop to reduce electromagnetic interference, and features a notch on the middle shielding sheet for improved insert molding and enhanced shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple rows of terminals including differential signal terminals are arranged in the insulating body, then signal transmission capability is improved, but electromagnetic interference between terminals increases
Solution Approach 1:
The patent divides the terminal arrangement into multiple rows with ground terminals positioned at specific locations (outermost positions and intermediate positions) to segment the signal transmission paths. This segmentation isolates differential signal terminals from each other using ground terminals as barriers, reducing electromagnetic interference while maintaining signal transmission capability across multiple rows.
Solution Approach 2:
Ground terminals serve as intermediary elements between differential signal terminals. These ground terminals act as mediators that provide electromagnetic shielding and reference potential, preventing direct interference between adjacent signal terminals while allowing the multi-row arrangement to function effectively for high-frequency signal transmission.
2Reliability
If ground terminals are designed with laterally protruding urging portions, then contact reliability with inner metal shell is improved, but device complexity increases
Solution Approach 1:
The urging portion is merged with the ground terminal body as an integrated structure. The lateral protrusion is formed as part of the terminal during the same manufacturing process, combining the grounding function and the contact assurance function into a single component without requiring separate elements or complex assembly steps.
Solution Approach 2:
The urging portion provides self-service by automatically ensuring contact with the inner metal shell through its lateral protrusion. During insertion, the urging portion naturally engages with the metal shell to establish and maintain electrical contact, eliminating the need for additional adjustment mechanisms or separate contact assurance components.
3Object-affected harmful factors
If inner metal shell is enclosed by outer metal shell forming mating cavity, then shielding effect is improved, but manufacturing complexity increases
Solution Approach 1:
The inner metal shell is nested within the outer metal shell, creating a concentric shielding structure. This nested arrangement provides effective electromagnetic shielding by placing the inner shell (which directly surrounds the terminals) inside the outer shell (which forms the mating cavity), achieving enhanced protection against electromagnetic interference through layered shielding.
Solution Approach 2:
The outer metal shell serves multiple functions: it provides the mating cavity for connector insertion, offers external electromagnetic shielding, and structurally supports the inner metal shell. This multi-functionality reduces the need for separate components, simplifying the overall manufacturing process despite the complex shielding requirement.
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
This design effectively reduces electromagnetic interference during high-frequency signal transmission by providing a robust shielding effect and simplifying the machining process, while ensuring reliable contact and grounding for the inner metal shell.
Implementation Method 1
The ground terminal protrudes laterally to form an urging portion. The inner metal shell is in contact with the plate edge of the urging portion.
Implementation Method 2
The urging portion is connected with the inner metal shell by spot welding.
Data Source
AI summary
An electrical connector used for mating a mating connector includes an insulating body having a base and a tongue extending from the base, a plurality of terminals fixedly disposed in the base portion in an upper row and a lower row, and a middle shielding sheet embedded in the tongue and located between the upper row and the lower row of terminals. The middle shielding sheet has a notch concavely formed on a front end of the middle shielding sheet and overlapping a central line of the middle shielding sheet along a longitudinal direction, at least one first projection portion extending from the notch, and at least one second projection portion extending from the notch. The first projection portion locates in front of the second projection portion, and the first projection portion is farther away from the central line of the middle shielding sheet than the second projection portion is.