Connector Module Face Contact Shielding
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Solution Overview
Problem
Existing connector modules for coaxial cables suffer from increased product and manufacturing costs due to the use of multiple components, and their shielding performance is compromised by gaps formed by non-flat wave washers or slit arrangements, leading to inferior electromagnetic shielding.
Innovation Solution
A connector module design featuring a linear center conductor, a tubular insulator holder, and a conductive shell with a shield case that provides face contact without additional components, ensuring effective electrical connection and enhanced shielding performance by eliminating mechanical gaps and reducing the number of components needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wave washer is used to connect the conductive shell to the shield case, then shielding performance is improved, but the number of components increases leading to higher product and manufacturing costs
Solution Approach 1:
The conductive shell and shield case are directly connected through face contact without inserting a wave washer between them. The outer circumferential face of the conductive shell contacts the inner circumferential face of the protruding portion of the shield case, merging two components that were previously separated by an additional shielding component, thereby reducing part count while maintaining shielding effectiveness
Solution Approach 2:
The wave washer component is completely removed from the assembly. The shielding function previously provided by the wave washer is achieved through the direct face contact between the conductive shell and shield case, extracting the unnecessary intermediate component while preserving the essential shielding capability
2Reliability
If a wave washer is used to close the through hole, then shielding performance is enhanced, but mechanical gaps may form due to the wave washer not being completely flat
Solution Approach 1:
The wave washer is replaced with a simple protruding portion integrated into the shield case structure. This integrated feature eliminates the need for a separate disposable component that could deform or create gaps, providing a more reliable and permanent sealing solution that maintains shielding integrity
Solution Approach 2:
The protruding portion is formed as an integral part of the shield case rather than being a separate wave washer component. This merging of functions eliminates the interface between two separate parts where gaps could form, ensuring continuous shielding coverage without mechanical gaps
3Device complexity
If a plate spring arrangement with a slit is used instead of a wave washer, then the number of components is reduced, but shielding effect deteriorates due to the slit forming a gap
Solution Approach 1:
The conductive shell and shield case are merged through direct face contact without any slits or openings in the connecting structure. The outer circumferential face of the conductive shell directly contacts the inner circumferential face of the protruding portion, creating a continuous shielding path without the gap-forming slits present in plate spring arrangements
Solution Approach 2:
The plate spring arrangement with its inherent slit is replaced by a simple protruding portion that forms a complete, gap-free connection. This eliminates the need for complex spring mechanisms while providing superior shielding continuity without compromising structural integrity
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 achieves superior shielding performance with a reduced number of components, suppressing electrical resistance and mechanical gaps, thereby improving the reliability and cost-effectiveness of the connector module.
Implementation Method 1
a shield case (7) configured to shield an inner space (E2) of the shield case against electromagnetic wave propagated in an outer space (E1) of the shield case
Implementation Method 2
an outer circumferential face of the conductive shell and an inner circumferential face of the protruding portion being placed in face contact with each other
Data Source
Figure 1
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AI summary
Provided is a connector module providing superior shielding performance with small number of components. The connector module (10) includes a terminal module (30) having a center conductor (1), a tubular insulator holder (2) supporting the center conductor (1) and a tubular conductive shell (3), and a shield case (7). A bottom portion (71) of the shield case (7) includes a protruding portion (75) bent from an edge (73e) of an opening portion (73) through which the terminal module (30) extends and protruding in a cylindrical form. The terminal module (30) is joined to the shield case (3) with an outer circumferential face (3b) of the conductive shell (3) and an inner circumferential face (75a) of the protruding portion (75) being placed in face contact with each other.