Lead Frame Shielding Elastic Arms Grounding
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Solution Overview
Problem
Conventional communication connecting devices have gaps between adjacent grounding terminals, which fail to provide adequate shielding, allowing interference to pass through and reducing the effectiveness of signal transmission.
Innovation Solution
The design includes a communication connecting device with first and second connectors featuring lead frames, insulating frames, signal terminals, and grounding terminals with shielding sheets and elastic arms that protrude and contact each other, creating a comprehensive shielding effect by covering the area between the top and bottom edges of the shielding sheet, thereby preventing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional grounding terminals are used with adjacent portions, then the device complexity is reduced, but the shielding effect is insufficient due to gaps between terminals
Solution Approach 1:
The grounding terminal is divided into multiple functional parts: a shielding sheet for providing the shielding surface, and multiple elastic arms extending from the shielding sheet. Each elastic arm can independently contact adjacent grounding terminals to ensure continuous shielding coverage, eliminating gaps while maintaining structural organization.
Solution Approach 2:
The shielding sheet extends in a direction perpendicular to the signal transmission direction, creating a two-dimensional shielding surface. The elastic arms extend from the shielding sheet to contact adjacent terminals, adding another dimensional layer of coverage that ensures complete shielding without requiring complex multi-terminal arrangements.
2Reliability
If elastic arms are added to the grounding terminal, then the shielding coverage is improved, but the manufacturing complexity increases
Solution Approach 1:
The elastic arms are integrally formed with the shielding sheet as a single piece, eliminating the need for separate assembly steps. This merging of components simplifies manufacturing while ensuring that the elastic arms maintain proper alignment and contact pressure with adjacent grounding terminals for continuous shielding coverage.
3Reliability
If the shielding sheet extends between top and bottom edges, then the covering space is increased, but the device volume increases
Solution Approach 1:
The shielding sheet is designed as a thin, planar structure that extends between the top and bottom edges to maximize covering space. This thin-film approach provides extensive shielding coverage while minimizing the volume occupied by the shielding structure, as the sheet has negligible thickness compared to its extended surface area.
Data Source
AI summary
A lead frame assembly includes two lead frames detachably coupled to each other. Each lead frame has an insulating frame, several signal terminals fixed on the insulating frame, and a ground terminal fixed on the insulating frame. One of the ground terminals has a shielding sheet and several groups of elastic arms, and the shielding sheet and the elastic arms are protruding from the corresponding insulating frame; another ground terminal has several shielding portions protruding from the corresponding insulating frame. The ground terminals are contact with each other along a shielding direction, and the groups of elastic arms are respectively abutted against the shielding portions. In a space, which is surroundingly defined by the contour of the shielding sheet extending along the shielding direction, the shielding direction passes through at least one of the shielding sheet, the elastic arms, and the shielding portions.