Cable Connector Lever Mechanism for Signal Stability

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Solution Overview

Problem

The quality of signal characteristics in optical transceiver modules becomes unstable due to variations in manual soldering work quality, especially at high communication speeds above 25 Gbps, affecting the electrical connections between circuit boards and flexible boards.

Innovation Solution

A cable connection structure with a flexible cable having contact pads for signal and ground lines, a ground plate, and a reinforcing plate, along with a lever member to securely connect the cable to a housing, eliminating the need for soldering and ensuring stable connections.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If manual soldering work is used to connect flexible boards to circuit boards, then connection quality may be achieved, but work quality variation occurs especially at high communication speeds

Engineering Contradiction:

Improveconnection qualityVSAvoidwork quality variation

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The patent replaces the manual soldering process (mechanical/thermal joining method) with a mechanical pressing connection system. The pressing member applies force to press the flexible board against the circuit board, creating electrical connection through contact pressure rather than solder joints. This eliminates the quality variation inherent in manual soldering while maintaining reliable electrical connection at high communication speeds.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If manual soldering is used for connecting terminals, then electrical connection can be established, but signal characteristics become unstable at 25 Gbps or higher speeds

Engineering Contradiction:

Improveelectrical connectionVSAvoidsignal characteristic stability

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The patent substitutes the soldering-based electrical connection system with a mechanical pressing connection system. The pressing member creates consistent contact pressure between the flexible board terminals and circuit board contacts, ensuring stable signal characteristics at high speeds without the quality variation introduced by manual soldering processes.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Ease of manufacture

If soldering work is performed by hand, then connection can be made, but connection quality becomes unstable affecting transceiver module performance

Engineering Contradiction:

Improveconnection processVSAvoidconnection quality stability

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent replaces the manual soldering operation with an automated mechanical pressing system. The pressing member is actuated to apply force and secure the flexible board to the circuit board, eliminating the need for skilled manual soldering while ensuring consistent connection quality and stability in the transceiver module assembly.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS9831582B2Cable connection structure and cable connector including same

Publication Date: 2017.11.28 YAMAICHI ELECTRONICS CO LTD

AI summary

A cable connector includes a connection end portion of a flexible board, in which a rectangular reinforcing plate molded of a conductive resin material is fixed to part of an upper surface of a ground plate. The connection end portion of the flexible board is electrically connected to a printed circuit board through the cable connector.