Push-Pull Plug Shielding Spring for Circumferential EMI Contact
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Solution Overview
Problem
Existing shielded push-pull plugs lack effective shielding properties, which can lead to electromagnetic interference and reduced signal integrity.
Innovation Solution
The introduction of a shielding spring with tab-like projections that engage with a snap-ring and shielding sleeve, forming a complete circumferential projection to enhance shielding and electrical connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional shielding sleeve is used without additional shielding elements, then the device complexity is low, but the electromagnetic shielding effectiveness is insufficient
Solution Approach 1:
The shielding function is segmented between the shielding sleeve and the shielding spring, with the spring providing additional tab-like projections that engage with the snap-ring to create a complete circumferential shield. This segmentation allows each component to contribute specifically to the overall shielding effectiveness without requiring complete redesign of existing elements.
Solution Approach 2:
The shielding spring is arranged around the shielding sleeve, creating a nested configuration where the spring's tab-like projections extend outward to form the complete circumferential projection. This nested structure enhances shielding without significantly increasing the overall device footprint or complexity.
2Object-affected harmful factors
If a shielding spring with tab-like projections is added to engage with the snap-ring, then the electromagnetic shielding effectiveness is improved, but the device complexity increases
Solution Approach 1:
The shielding spring merges multiple functions into a single component: it provides electromagnetic shielding through its tab-like projections, maintains mechanical engagement with the snap-ring, and ensures electrical connectivity. This consolidation reduces the need for separate components while achieving enhanced shielding effectiveness.
Solution Approach 2:
The shielding spring serves multiple purposes simultaneously: it acts as a shielding element, a mechanical connector to the snap-ring, and an electrical conductor. This multi-functionality reduces device complexity by eliminating the need for separate components for each function.
3Strength
If the snap-ring has a completely circumferential projection for engagement with the undercut, then the mechanical locking is strong, but the electrical connectivity between shielding components may be insufficient
Solution Approach 1:
The shielding spring acts as an intermediary element between the snap-ring and the shielding sleeve, providing both mechanical engagement through its tab-like projections and electrical connectivity through its conductive material. This intermediary component ensures that both mechanical locking and electrical connectivity requirements are met simultaneously.
Solution Approach 2:
The shielding spring is made of electrically conductive material that combines mechanical strength for engagement with the snap-ring and electrical conductivity for signal transmission. This composite material approach allows a single component to satisfy both mechanical and electrical requirements.
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 shielding spring significantly improves the electromagnetic shielding effectiveness of the push-pull plug, reducing interference and ensuring reliable signal transmission.
Implementation Method 1
the shielding spring, which is made of a metal material, loops through the shielding of the push-pull plug to the panel-mounted socket
Implementation Method 2
under spring action, a mechanical arrangement and fixing as well as alternatively or additionally an electrical mating between the snap-ring (if made of a metal material) and the shielding sleeve (if likewise made of a metal material) can be realized
Implementation Method 3
by an axial movement of the grip sleeve, its front end acts on a circumferential sloping ramp of the snap-ring and thereby presses it down
Data Source
AI summary
A push-pull plug may include a shielding spring which, viewed in the insertion direction, may have tab-like projections at the front, wherein a snap-ring may have tab-like recesses which correspond to the tab-like projections of the shielding spring and in which the projections of the shielding spring are arranged so that the tab-like projections of the shielding spring together with the tab-like projections of the snap-ring form a completely circumferential projection which comes to bear in the undercut in the panel-mounted socket. In the process, the shielding spring, which may be made of a metal material, loops through the shielding of the push-pull plug to the panel-mounted socket, wherein the shielding spring is directly or indirectly electrically connected to a shielding of a cable on which the push-pull plug is arranged.