Filtered Connector With External Filter Board
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Solution Overview
Problem
Existing filtered connectors require replacement of entire connectors when installing filter boards, leading to additional costs and incomplete suppression of electromagnetic interference (EMI) due to direct mounting inside connection ports.
Innovation Solution
A filtered connector design where the connection port and filter board are separately mounted, with the filter board including a circuit board assembly, grounding spring plates, and filtering capacitors that provide an additional grounding path without replacing the original connection port, allowing for external mounting and effective EMI shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the filter board is directly mounted inside the connection ports of the connectors, then the filtering of high frequency signals is achieved, but the original connection ports must be totally replaced and fail to be reused
Solution Approach 1:
The invention separates the filter board from the connection port, making them independent components. The filter board is mounted separately on the casing rather than being integrated inside the connection port, allowing the connection port to be reused while still achieving filtering functionality.
Solution Approach 2:
The filter board is extracted from the internal structure of the connection port and mounted externally on the casing. This extraction allows the original connection ports to remain functional and reusable while the filter board provides the necessary high-frequency signal filtering.
2Reliability
If the filter board is directly mounted inside the connection ports, then the filtering function is provided, but purchase of entire set of new connectors poses additional burden to users
Solution Approach 1:
By segmenting the filter board and connection port into separate components, the invention allows users to install only the filter board without replacing expensive connectors, thereby reducing installation costs while maintaining EMI suppression effectiveness.
Solution Approach 2:
The filter board is taken out from the connector assembly and mounted independently on the casing, enabling users to add filtering functionality without purchasing replacement connectors, thus reducing overall system cost.
3Reliability
If the filter board is mounted inside the connection ports, then the filtering is provided, but filtering of high frequency signals may not completely stop generation of electromagnetic waves
Solution Approach 1:
The filter board is moved from the internal dimension (inside connection ports) to an external dimension (mounted on the casing surface). This dimensional change allows the filter board to provide additional grounding paths and filtering capacity that more effectively suppress electromagnetic wave generation.
Solution Approach 2:
The filter board acts as an intermediary component mounted on the casing, providing enhanced filtering and additional grounding paths that bridge the connection ports and the casing, thereby more effectively suppressing electromagnetic interference.
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 solution allows for effective EMI shielding without replacing the existing connectors, reducing electromagnetic wave leakage and operational interference while minimizing user burden by allowing the filter board to be installed separately, thus enhancing the filtering efficiency and reducing costs.
Implementation Method 1
multiple filtering capacitors are mounted on the first surface of the circuit board assembly. One end of each filtering capacitor is electrically connected to the electrode plate of the connection port, and the other end of the filtering capacitor is electrically connected to the multiple grounding spring plates
Implementation Method 2
The multiple grounding spring plates are mounted on the second surface of the circuit board assembly to electrically contact the casing
Data Source
AI summary
A filtered connector is mounted on a casing and includes a connection port and a filter board. An electrode plate mounted on one end of the connection port and electrically isolated from the casing is securely mounted through a through hole of the casing. The filter board has a circuit board assembly, multiple grounding spring plates and multiple filtering capacitors. The circuit board assembly has a slot to be mounted through by the electrode plate. The grounding spring plates are mounted on a surface of the circuit board assembly and electrically contact the casing. The filtering capacitors are electrically connected between the electrode plate and the grounding spring plates. As the filter board is not mounted inside the connection port, only the filter board is to be mounted without replacing the connection port, thereby lowering users' expense in installation of the filter board.