Board Connector Shield Wall Layout for EMI Gap Coverage
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Solution Overview
Problem
Conventional board-connecting electric connector devices lack sufficient electromagnetic shielding for high-frequency transmission signals due to gaps between shield walls and wiring boards, leading to inadequate EMI protection.
Innovation Solution
The configuration of board-connecting electric connectors with shield wall portions extending along the connector longitudinal direction, opposing each other when mated, and sliding guide surfaces for low-friction movement, ensures double-layer shielding and efficient gap coverage, enhancing EMI measures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a shield wall is provided in only one electric connector, then the device complexity is reduced, but the electromagnetic shielding function becomes insufficient due to gaps between the shield wall and wiring board
Solution Approach 1:
The electromagnetic shielding function is segmented between two electric connectors, with each connector providing its own shield wall. This division allows each shield wall to be optimized for its specific position and function, while together they provide comprehensive shielding coverage that eliminates gaps between the shield and wiring board.
Solution Approach 2:
The shield walls of the two electric connectors are positioned to overlap when the connectors are mated, creating a nested shielding configuration. The shield wall of one connector is disposed to overlap with the shield wall of the other connector, forming layers of protection that completely cover the contact connecting portions and eliminate gaps.
2Reliability
If shield walls are provided in both electric connectors with overlapping disposition, then the electromagnetic shielding function is improved, but the device complexity increases
Solution Approach 1:
The shield walls in both electric connectors serve dual functions: they provide electromagnetic shielding for their respective connectors and simultaneously work together to create overlapping coverage that eliminates gaps. This multi-functionality allows the same structural element to address multiple shielding requirements without adding separate components.
Solution Approach 2:
The shielding functions of both electric connectors are merged through the overlapping disposition of their shield walls. When the connectors are mated, the shield walls combine to form a continuous shielding barrier that covers all contact connecting portions, effectively merging the shielding capabilities of both connectors into a unified protective system.
3Ease of manufacture
If conventional single-sided shielding is used, then the manufacturing process is simplified, but sufficient EMI protection cannot be obtained due to large gaps
Solution Approach 1:
The overlapping shield wall configuration is built into the connector design before assembly, ensuring that when the connectors are mated, the shields automatically align to eliminate gaps. This preliminary configuration of the shielding structure prevents EMI issues from arising in the first place, rather than requiring additional corrective measures.
Data Source
AI summary
Electromagnetic shielding about both of electric connectors, which are in a mutually mated state, can be sufficiently carried out by a simple configuration. Shield wall portions composed of electrically-conductive members opposed to contact connecting portions (board connecting portions) of a plurality of contact members arranged in multipolar shapes are provided; electromagnetic shielding functions with respect to the contact connecting portions in the respective electric connectors are obtained well by the respective shield wall portions; and, when both of the electric connectors are mated with each other, the shield wall portions are configured to be in an inner/outer double disposition relation in which they are opposed to each other and efficiently block the gaps between the shield wall portions and wiring boards so that sufficient EMI measures can be expected.