Electrical Connector Shielding via Ground Terminal Inversion
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Solution Overview
Problem
Existing electrical connectors face challenges in preventing electromagnetic interference between signal terminals due to structural differences between signal and grounding terminals, leading to increased production complexity and potential assembly errors that affect shielding effectiveness.
Innovation Solution
The electrical connector design includes an insulating body with signal and ground accommodating holes, signal and ground terminals, and shielding sheets with urging portions that ensure ground terminals contact shielding sheets, while stopping portions prevent signal terminals from contacting shielding sheets, ensuring effective shielding without short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If signal terminals are made different from ground terminals by adding extending portions, then shielding effect is improved, but device complexity and processing difficulty increase
Solution Approach 1:
Instead of adding extending portions to signal terminals to achieve shielding, the patent inverts the approach by making ground terminals have extending portions that contact shielding sheets, while signal terminals remain simple without extending portions. This is implemented by providing ground terminals with L-shaped structures that extend to contact shielding sheets, while signal terminals have simple pin structures, thereby achieving shielding effect while simplifying signal terminal design.
Solution Approach 2:
The patent applies local quality by differentiating the structure of ground terminals from signal terminals only where necessary for shielding function. Ground terminals have L-shaped extending portions specifically at the locations where shielding contact is needed, while signal terminals maintain simple structures. This localized structural differentiation achieves the shielding effect without unnecessarily complicating the overall terminal design.
2Ease of manufacture
If signal terminals do not have extending portions contacting shielding sheets, then processing is simplified, but assembly errors may occur reducing shielding effectiveness
Solution Approach 1:
The patent introduces an intermediary mechanism - the insulating body with specifically designed accommodating holes - that mediates between the simple signal terminals and the shielding sheets. The accommodating holes are positioned and sized such that they automatically guide and constrain signal terminals to correct positions, ensuring proper assembly without requiring complex terminal structures or relying on operator skill.
Solution Approach 2:
The insulating body is pre-designed with accommodating holes that have specific positions, sizes, and orientations before assembly. These pre-configured holes perform the preliminary action of positioning and guiding the terminals during assembly, ensuring that signal terminals are automatically placed in correct positions without requiring operators to make judgment calls or perform complex alignment operations.
3Reliability
If ground terminals and signal terminals have different structures, then shielding is achieved, but manufacturing complexity increases
Solution Approach 1:
The patent segments the terminal functions into two distinct types: ground terminals with L-shaped structures for shielding contact, and signal terminals with simple pin structures for signal transmission. This segmentation allows each terminal type to be optimized for its specific function and manufactured using specialized processes, improving overall production efficiency compared to manufacturing all terminals with complex unified structures.
Solution Approach 2:
The insulating body serves multiple functions simultaneously: it provides structural support, positions terminals through accommodating holes, electrically isolates different terminals, and guides assembly. This multi-functionality reduces the need for additional components and simplifies the manufacturing process, thereby improving productivity while maintaining the shielding effect.
Data Source
AI summary
An electrical connector includes an insulating body provided with multiple accommodating holes penetrating through the insulating body vertically, multiple terminals used for contacting a chip module, and at least one shielding sheet accommodated in the insulating body. The accommodating holes include signal accommodating holes and ground accommodating holes. Each signal accommodating hole is provided with a stopping portion. The terminals include signal terminals accommodated in the signal accommodating holes and ground terminals accommodated in the ground accommodating holes. Each shielding sheet or each terminal is provided with an urging portion. The ground terminals and the shielding sheet contact each other through the urging portion, and the stopping portions stop the urging portion to prevent the signal terminals and the shielding sheet from contacting each other.