Shielded Connector Shell Layout for Shorter Ground Paths
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Solution Overview
Problem
Conventional shield-type connectors have a long ground conduction path and low shield performance due to the large occupation region of contact components, making it difficult to enhance shield performance by increasing the number of contact pieces.
Innovation Solution
A shield-type connector design where the contact portion of the cover shell is inserted between the contact portions of the inner and outer shells, shortening the ground conduction path and reducing the occupation region, using various shape portions such as spring plate, protrusion, and flat plate contact portions to enhance shield performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the bending piece and spring piece are disposed side by side on the side surface of the back shell, then the ground conduction path is formed, but the occupation region is large and the shield performance is low
Solution Approach 1:
The contact portion of the cover shell is inserted between the contact portions of the inner shell and outer shell, creating a nested arrangement where three contact portions overlap at the same position. This nesting structure reduces the occupation region from a side-by-side layout to a compact stacked configuration, directly resolving the contradiction between forming a ground conduction path and minimizing occupation region.
Solution Approach 2:
The invention transitions from a two-dimensional side-by-side arrangement of contact pieces to a three-dimensional overlapping configuration where contact portions are stacked in the thickness direction. This dimensional change allows the ground conduction path to be formed within a smaller footprint area, effectively reducing the occupation region on the side surface while maintaining electrical connectivity.
2Reliability
If the bending piece and spring piece are disposed side by side, then the ground conduction path is formed, but the path length is long and shield performance is low
Solution Approach 1:
By nesting the contact portions in the thickness direction with overlapping positions, the ground conduction path is shortened from a long side-by-side route to a compact stacked configuration. The path length is reduced because the electrical connection is established through vertically stacked contact surfaces rather than extending horizontally across the side surface.
Solution Approach 2:
The ground conduction path is reconfigured from a horizontal extension in the side surface plane to a vertical stacking arrangement in the thickness direction. This dimensional transformation shortens the effective path length by utilizing the third dimension (depth/thickness) to establish electrical connectivity more directly between the inner shell, cover shell, and outer shell.
3Reliability
If the occupation region of contact portions is large, then the ground conduction path is formed, but it is difficult to enhance shield performance by increasing the number of contact pieces
Solution Approach 1:
The nested arrangement of contact portions in the thickness direction creates a compact structure that occupies minimal space. This allows multiple contact pieces to be stacked vertically rather than requiring extensive horizontal space, thereby enabling enhancement of shield performance through increased number of contact pieces without proportionally increasing the occupation region or device complexity.
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
The design improves shield performance by shortening the ground conduction path and reducing the occupation region, allowing for easier enhancement of shield performance by increasing the number of contact portions, resulting in improved noise resistance and reduced connector size.
Implementation Method 1
a spring plate shape portion having elastic force
Data Source
AI summary
A shield-type connector includes: an inner shell made of metal and provided in an inner housing; an outer shell made of metal and provided in an outer housing; and a cover shell made of metal and contacting with both of the inner shell and the outer shell, in which the inner shell, the outer shell and the cover shell include contact portions that contact with each other, and the contact portion of the cover shell is inserted between the contact portion of the inner shell and the contact portion of the outer shell.