Coaxial Connector EMI Shield Plate Slit Coverage
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Solution Overview
Problem
Coaxial connectors face challenges in minimizing size and effectively addressing electromagnetic interference (EMI) due to design limitations, particularly with noise signal leakage through slits in lock piece mechanisms.
Innovation Solution
Incorporation of an L-shaped electromagnetic shield plate between the internal housing and shell, which shields the slits and rear end portion of the internal housing, combined with a crimping mechanism for the outer conductor and insulation sheath, to prevent noise signal leakage and input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a lock piece with slits is used to enable locking and unlocking functionality, then the ease of operation is improved, but electromagnetic interference protection deteriorates due to noise signal leakage through the slits
Solution Approach 1:
An electromagnetic shield plate is introduced as an intermediary component between the lock piece and the internal housing. This shield plate covers the slits in the lock piece, preventing noise signals from leaking through while still allowing the lock piece to perform its locking and unlocking operations. The shield plate acts as a mediator that maintains both the operational functionality and the EMI protection.
2Volume of moving object
If the internal housing is miniaturized to reduce connector size, then the device complexity is reduced, but electromagnetic interference protection deteriorates due to reduced space for shielding structures
Solution Approach 1:
Instead of providing comprehensive shielding around the entire internal housing, the electromagnetic shield plate is strategically positioned to cover only the critical areas where noise signals can enter or leak, specifically the slits in the lock piece and the rear end portion of the internal housing. This localized shielding approach provides effective EMI protection while minimizing the space required, enabling connector miniaturization.
Solution Approach 2:
The electromagnetic shield plate extends in multiple directions (L-shape configuration) to provide comprehensive coverage of critical areas. By utilizing three-dimensional space efficiently, the shield plate achieves effective EMI protection without proportionally increasing the overall connector volume, thus supporting miniaturization goals.
3Object-affected harmful factors
If an electromagnetic shield plate is added to cover slits and protect against EMI, then electromagnetic interference protection is improved, but device complexity increases
Solution Approach 1:
The electromagnetic shield plate serves multiple functions simultaneously: it shields the slits in the lock piece from noise signals, protects the rear end portion of the internal housing, and maintains the structural integrity of the connector assembly. By consolidating these shielding functions into a single component, the design achieves comprehensive EMI protection without proportionally increasing 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 solution effectively suppresses noise signal leakage and input while maintaining compatibility with existing coaxial connector designs, enabling miniaturization and improved EMI protection.
Implementation Method 1
an L-shaped electromagnetic shield plate interposed between the shell and the internal housing which sheathes a part of the internal housing; wherein the cable clamp comprises a conductor barrel which can crimp the outer conductor, and an insulation grip which can crimp the insulation sheath, the shell main body has a pair of slits at both sides of an upper face, and has a lock piece supported with a cantilever shape at the upper face, and the electromagnetic shield plate is disposed at an upper face of the internal housing, and has one piece which shields a portion of the pair of slits with respect to the internal housing
Data Source
AI summary
The coaxial connector is provided with a contact, an internal housing, a shell and an electromagnetic shield plate. The contact has a connecting portion which can connect with a mating side contact, and a crimping portion which crimps the central conductor. The internal housing has a contact receiving chamber opened at a rear end portion, and the connector is retained in the contact receiving chamber. The shell has a shell main body covering an external perimeter of the internal housing, and a cable clamp. The cable clamp fixes an end of the coaxial cable. The shell main body has a lock piece. A pair of slits is provided at both sides of the lock piece. The electromagnetic shield plate is disposed at an upper face of the internal housing, and has one piece which shields a portion of the pair of slits with respect to the internal housing.