Edge Connector Locking Strip for Vibration Resistance

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Solution Overview

Problem

Existing edge plug-in connection systems on printed circuit boards are difficult to assemble correctly, leading to potential loosening due to vibrations, and existing solutions require complex geometries and multiple latching elements, making them unreliable and costly.

Innovation Solution

A plug connection safety device with a separable fastening strip that can be easily assembled by plugging the connector onto the contact strip and then mounting the lock, which secures the edge connector without direct dependency on the connector or contact strip geometry, ensuring high reliability even if assembly is incorrect.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple latching elements are used to secure the edge connector, then the connector is secured against loosening, but the assembly becomes more complex and difficult to inspect

Engineering Contradiction:
Improvesecurity against looseningVSAvoidnumber of latching elements
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines multiple latching elements into a single integrated connector lock component. This lock has a U-shaped cross-section that allows it to simultaneously engage with multiple contact strips, providing the security function of multiple latches while simplifying the overall structure into one piece that is easier to assemble and inspect.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The connector lock serves multiple functions simultaneously: it secures the connector against loosening, provides a visible inspection feature for quality control, and simplifies the assembly process. This multi-functional design resolves the contradiction by making a single component do the work of multiple specialized elements.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Reliability

If specially designed geometries are required for plug-in connection, then the connection can be secured, but the manufacturing cost and complexity increase

Engineering Contradiction:
Improveconnection securityVSAvoidassembly simplicity
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

The invention separates the security function from the connector geometry itself by introducing a distinct connector lock component. This segmentation allows the contact strips and connector to maintain simple, easy-to-manufacture geometries while the separate lock component provides the necessary security through its own specialized geometry, resolving the contradiction between connection security and manufacturing simplicity.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The connector lock acts as an intermediary element between the connector and the contact strips. Instead of requiring complex geometries on the main connector components, this intermediate lock component provides the specialized geometry needed for secure engagement, simplifying the manufacturing of the primary components while maintaining connection security.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Reliability

If assembly errors occur in plug-in connection, then the connection may be incorrect, but with multiple latching elements it is difficult to detect assembly errors

Engineering Contradiction:
Improveconnection integrityVSAvoidassembly inspection difficulty
Core Design Contradiction:
ReliabilityVSDifficulty of detecting and measuring

Solution Approach 1:

The connector lock incorporates visual indicators that change or become visible when properly assembled. The U-shaped cross-section and specific geometric features provide visual cues that allow operators to easily inspect and verify correct assembly, making assembly errors detectable while maintaining connection integrity.

Inventive Principle:
Principle #32Color changes

Solution Approach 2:

The connector lock design provides immediate visual feedback about assembly status. The geometry of the lock and its engagement with the contact strips creates visible indicators that tell the assembler whether the connection is correct, enabling real-time detection and correction of assembly errors while ensuring connection integrity.

Inventive Principle:
Principle #23Feedback

Data Source

PatentEP3826116B1Plug connection system and use of a plug connection securing system in a plug connection system
Publication Date: 2023.08.02 MARELLI GERMANY GMBH
  • EP3826116B1 patent drawingFigure 1

AI summary

The invention relates to a connector system (10) for an edge connector (26), comprising a connector strip (16) formed in an edge region (14) of a printed circuit board (12), a connector (20) designed to fit onto the connector strip (16), and a connector locking device (28) for securing the edge connector (26) formed by the connector (20) and the connector strip (16) against unintentional disconnection. It is characterized in that the connector locking device (28) is designed as a mounting strip (30) and/or has such a mounting strip (30), wherein a connection receptacle (32) and a connection section (34) are arranged and/or formed on the mounting strip (30), and wherein the connection section (34) and the connection receptacle (32) can be fixed to one another. The invention further relates to a use of a connector locking device (28).The invention makes it possible to produce an edge connector (26) in a simple and cost-effective manner and to reliably secure it against self-loosening.