Cable Device Metal Shell for Invisible EMI Shielding
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Solution Overview
Problem
Cables without electromagnetic interference (EMI) shielding structures are visible and degrade the appearance of electronic devices, while those with EMI shielding structures are difficult to integrate into invisible cables, and both types struggle with EMI shielding in connectors.
Innovation Solution
A cable device with a metal shell and insulating connecting member that includes a conductive case connected to a ground electrode, allowing for EMI shielding without a separate structure, and adjustable metal components for enhanced EMI/ESD shielding performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a cable includes an electromagnetic shielding structure, then EMI shielding performance is improved, but the cable becomes visible and impairs the appearance of electronic devices
Solution Approach 1:
The patent merges the electromagnetic shielding function with the connector housing by making the conductive case itself serve as the shielding structure. The conductive case is electrically connected to the ground electrode, combining the protective housing function with EMI shielding function into a single integrated component, thereby achieving shielding without visible separate shielding structures on the cable.
2Shape
If a cable does not include an electromagnetic shielding structure, then the cable remains invisible and maintains aesthetic appeal, but EMI shielding performance deteriorates
Solution Approach 1:
The patent extracts the electromagnetic shielding function from traditional cable shielding structures and relocates it to the connector housing. By placing the conductive shielding case at the connector end rather than along the entire cable length, the invention achieves EMI shielding where it is most needed (at the connection point) while maintaining the invisible aesthetic of the cable itself.
3Shape
If a connector is connected to an invisible cable, then aesthetic appeal is maintained, but EMI shielding in the connector becomes difficult to implement
Solution Approach 1:
The conductive case in the connector housing serves multiple functions simultaneously: it acts as the structural housing for the connector, provides EMI shielding through its conductive material connected to ground, and maintains the invisible aesthetic by being integrated into the connector rather than adding external visible elements. This multi-functional design resolves the contradiction between aesthetics and shielding effectiveness.
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 cable device effectively reduces EMI and ESD without visible shielding, maintaining aesthetic appeal and improving electromagnetic compatibility (EMC) noise reduction across various frequency bands.
Implementation Method 1
A cable may include a conductor, such as a copper wire, for high voltage power transmission. The cable may have an electromagnetic shielding structure surrounding the conductor to shield electromagnetic waves generated from the conductor.
Implementation Method 2
a metal band which is wound around the cable in a spiral shape along a winding direction, and a plurality of cylindrical bodies arranged in an extending direction of the cable at intervals in the winding direction and configured to shield electromagnetic waves
Data Source
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AI summary
Provided is a cable device having an improved electromagnetic interference (EMI) shielding performance. The cable device includes: a cable including an optical fiber; a connector including a printed circuit board connected to the cable and including a ground electrode, and a conductive case; a connecting member provided around a connection between the cable and the connector; and a metal shell surrounding the cable inside of the connecting member, the metal shell being configured to shield electromagnetic interference of the cable and the connector.