PCB Housing Conductor Tracks for Flexible Board Positioning

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Solution Overview

Problem

Existing methods for electrical contacting of printed circuit boards (PCBs) in field devices for process and automation technology impose spatial restrictions and are not suitable for use in potentially explosive atmospheres, necessitating a more flexible and automatable method.

Innovation Solution

The integration of conductor tracks within the housing, manufactured using Molded Interconnect Devices (MIDs) or additive manufacturing, allows for simultaneous positioning and electrical contacting of PCBs, eliminating spatial restrictions and enabling flexible arrangement of electrical contacts.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If additional components like sockets and plugs are used for electrical contacting between printed circuit boards, then reliable electrical contact is achieved, but the number of work steps and assembly complexity increases

Engineering Contradiction:
Improveelectrical contact reliabilityVSAvoidassembly complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines the mechanical fastening function and the electrical contact function into a single integrated component. The housing features fastening points that simultaneously provide mechanical support and electrical contact, eliminating the need for separate sockets and plugs. This merging of functions reduces the number of components and assembly steps while maintaining reliable electrical contact between printed circuit boards.

Inventive Principle:
Principle #5Merging (Combining)

2Productivity

If flexible connecting elements are used to contact printed circuit boards, then no additional work steps are needed, but the spatial arrangement is severely restricted

Engineering Contradiction:
Improveassembly efficiencyVSAvoidspatial arrangement freedom
Core Design Contradiction:
ProductivityVSAdaptability or versatility

Solution Approach 1:

The patent transitions from planar electrical contacts to three-dimensional conductor tracks integrated into the housing structure. These conductor tracks can extend in multiple spatial dimensions within the housing, allowing electrical contacts to reach printed circuit boards positioned at various locations and orientations. This dimensional freedom enables flexible spatial arrangement while maintaining assembly efficiency, as the conductor tracks are pre-integrated into the housing rather than requiring additional connection steps.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

3Adaptability or versatility

If conductor tracks are integrated into the housing, then spatial arrangement freedom and assembly efficiency are improved, but manufacturing complexity increases

Engineering Contradiction:
Improvespatial arrangement freedomVSAvoidhousing manufacturing
Core Design Contradiction:
Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent utilizes changes in material parameters and manufacturing processes to integrate conductor tracks into the housing. By employing injection molding techniques with conductive materials or post-molding metallization processes, the conductor tracks become an integral part of the housing structure. This approach, while requiring specialized manufacturing parameters, enables the housing to serve dual purposes as both structural support and electrical connection medium, achieving spatial flexibility without proportionally increasing manufacturing complexity.

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentEP3443825B1Method for positioning printed circuit boards, and printed circuit board arrangement
Publication Date: 2026.05.06 ENDRESS & HAUSER GMBH & CO KG
  • EP3443825B1 patent drawingFigure 1a~2c
  • EP3443825B1 patent drawingFigure 3a~4

AI summary

The invention relates to a method for positioning at least two printed circuit boards (1a, 1b) in a housing (2) of a field device in automation engineering, wherein at least the surface of the housing is nonconductive, wherein the housing (2) has, provided in it, at least a first mounting point (3a) for mounting the first printed circuit board (1a) and a second mounting point (3b) for mounting the second printed circuit board (1b) at respective prescribed positions, wherein at least one conductor track (10) arranged in the housing (2) is provided, wherein the conductor track (10) is non-detachably connected to the housing (2), and wherein the conductor track (10) makes electrical contact between the first mounting point (3a) and the second mounting point (3b), comprising the steps of: prefabricating the printed circuit boards (1a, 1b) and prefabricating the housing (2), mounting the printed circuit boards (1a, 1b) at the mounting points (3a, 3b) of the housing (2), with the mounting of the printed circuit boards (1a, 1b) involving the first printed circuit board (1a) being put into electrical contact with the first mounting point (3a) and the second printed circuit board (1b) being put into electrical contact with the second mounting point (3b), so that the first (1a) and the second (1b) printed circuit board are put into electrical contact with one another via the at least one conductor track (10).