Floating Sub-Connector Assembly for Accurate FPC Connector Positioning

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Solution Overview

Problem

Existing connector assemblies face issues where sub-connectors may be incorrectly attached to the housing due to manufacturing tolerances, leading to misalignment and improper positioning.

Innovation Solution

A connector assembly design featuring floatably held sub-connectors that are connected to branching end portions of a single FPC board, ensuring correct attachment to the housing by determining the order of sub-connectors during assembly, with key and definer mechanisms preventing incorrect positioning.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If sub-connectors are held floatably in the housing to accommodate manufacturing tolerances, then the connector assembly becomes more adaptable to misalignment, but the sub-connectors may be attached to incorrect positions

Engineering Contradiction:
Improveadaptability to misalignmentVSAvoidattachment position accuracy
Core Design Contradiction:
Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The patent applies preliminary action by determining the attachment order of sub-connectors before the actual attachment process. The control unit stores the correct attachment sequence and uses it to guide the assembly process, ensuring that each sub-connector is attached to the correct position while maintaining the floatable structure's adaptability to manufacturing tolerances

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent implements feedback through a control unit that monitors and manages the attachment process. The control unit stores the correct attachment order and provides feedback guidance to ensure sub-connectors are attached in the proper sequence, preventing incorrect positioning while preserving the floatable structure's ability to accommodate misalignment

Inventive Principle:
Principle #23Feedback

2Productivity

If multiple sub-connectors are attached to the housing simultaneously, then the assembly process becomes faster, but the risk of incorrect attachment increases

Engineering Contradiction:
Improveassembly speedVSAvoidattachment correctness
Core Design Contradiction:
ProductivityVSReliability

Solution Approach 1:

The patent applies preliminary action by pre-determining and storing the correct attachment order of multiple sub-connectors in a control unit before the assembly process begins. This allows the system to manage complex multi-connector attachment while maintaining both speed and accuracy

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The control unit provides feedback control during the assembly process, monitoring which sub-connectors have been attached and guiding the remaining attachments in the correct sequence. This feedback mechanism enables fast simultaneous attachment of multiple sub-connectors while preventing incorrect positioning

Inventive Principle:
Principle #23Feedback

Data Source

PatentEP4404390B1Connector assembly and structure comprising the same
Publication Date: 2025.07.02 JAPAN AVIATION ELECTRONICS IND LTD
  • EP4404390B1 patent drawingFigure 1~2
  • EP4404390B1 patent drawingFigure 3~4
  • EP4404390B1 patent drawingFigure 5~6

AI summary

A connector assembly comprises a first connector and a second connector which are mateable with each other along a front-rear direction. The first connector comprises two or more sub-connectors and a housing. The sub-connectors are configured to be connected to two or more branching end portions of a single flexible printed circuits (FPC) board, respectively. The housing holds each of the sub-connectors. Each of the sub-connectors is floatable relative to the housing. The second connector comprises two or more mating portions which correspond to the sub-connectors, respectively. Each of the sub-connectors is mateable with a corresponding one of the mating portions.