Plug-in Connector Housing Edge Scraping Coating
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Solution Overview
Problem
Metallic plug-in connector housings with surface coatings for corrosion protection experience reduced electric conductivity and worsened electromagnetic insulation due to increased transfer impedance when coated contact areas come into contact, leading to a compromised insulating effect.
Innovation Solution
The contact areas of the housing parts are designed with a linear edge configuration, where one contact area's edge scrapes off the surface coating of the other, exposing the conductive material, allowing direct contact between uncoated edges for improved conductivity and reducing transfer impedance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If surface coating is applied to housing parts for corrosion protection, then corrosion resistance is improved, but electric conductivity between contact areas deteriorates
Solution Approach 1:
The housing part has different surface properties in different regions: the contact area has an edge configuration that removes coating locally to expose conductive material, while other areas maintain coating for corrosion protection. This local differentiation resolves the contradiction between corrosion resistance and electric conductivity.
Solution Approach 2:
The edge configuration is pre-formed on the housing part before assembly. When the housing parts are joined, this pre-formed edge automatically scrapes off the coating on the mating contact surface, ensuring electrical contact is established in advance of actual use.
2Reliability
If contact areas are coated for corrosion protection, then corrosion resistance is improved, but transfer impedance increases
Solution Approach 1:
The coating is selectively removed at the contact interface through the edge configuration, creating a local conductive path. This maintains corrosion protection on coated surfaces while eliminating the harmful increase in transfer impedance at the contact area.
3Manufacturing precision
If linear edge configuration is used to scrape off coating, then electric conductivity is improved, but manufacturing complexity increases
Solution Approach 1:
The contact area is segmented into distinct regions: the edge portion that removes coating and the surrounding coated areas. This segmentation allows simple manufacturing of the edge feature while maintaining complex corrosion protection elsewhere.
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 maintains robustness and corrosion resistance while enhancing electromagnetic insulation by ensuring effective electrical contact between housing parts, thereby improving the insulating performance of the plug-in connector housing.
Implementation Method 1
one contact area's edge scrapes off the surface coating of the other
Implementation Method 2
the edge of one contact area scrapes the coating off the other contact area
Implementation Method 3
allowing direct contact between uncoated edges for improved conductivity and reducing transfer impedance
Data Source
AI summary
The invention relates to a plug connector housing consisting of at least one housing upper part and at least one housing lower part which together form a plug connector housing. The housing upper part and the housing lower part each have a contact surface, said contact surfaces being at least partly in contact with each other when the housing upper part and the housing lower part are connected to each other. The housing upper part and the housing lower part are made of an electrically conductive material, said housing upper part and lower part having a surface coating that protects against corrosion for example, and the contact between the two contact surfaces is formed along an edge.