PCB Contact Elements with Elastic Housing for Vibration Resistance
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Solution Overview
Problem
Printed circuit board connections in industrial settings are prone to failure due to high vibrations, as existing solutions either allow excessive play or wear out under continuous vibration loads, leading to unreliable electrical contacts.
Innovation Solution
A printed circuit board arrangement featuring two boards with geometrically identical circular contact openings and axial slots, where the contact elements are screw-fastened and housed in a plastic structure allowing parallel displacement, reducing vibration impact and enhancing durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the contact element is rigidly fastened on the first printed circuit board and clamped in the contact opening of the second printed circuit board, then the connection stability is improved, but the electrical contact becomes worn over time under continuous vibration load
Solution Approach 1:
The contact element is designed with elastic properties, allowing it to dynamically adapt to vibrations and movements rather than being rigidly fixed. The elastic material absorbs vibration energy and maintains continuous electrical contact despite relative movements between the printed circuit boards, preventing contact wear while preserving connection stability.
2Object-affected harmful factors
If the contact element allows certain degree of play for vibration compensation, then the vibration load is reduced, but the connection reliability deteriorates under high vibrations
Solution Approach 1:
The contact element's elastic properties are specifically optimized to provide controlled play that compensates for vibrations. The material and geometric parameters are selected to allow sufficient movement for vibration absorption while maintaining reliable electrical contact, resolving the contradiction between vibration compensation and connection reliability.
3Manufacturing precision
If the contact opening is formed as a circular through-opening with conductive edge region, then the manufacturing precision is improved, but the clamping effect is insufficient without axial slots
Solution Approach 1:
The contact opening is segmented by introducing axial slots that divide the circular opening into segments. This segmentation creates a clamping effect by allowing the conductive edge region to flex and grip the contact element, while the overall circular geometry is maintained for manufacturing precision. The slots enable localized deformation for enhanced clamping without compromising the global geometric accuracy.
Data Source
AI summary
A printed circuit board assembly is provided having a first printed circuit board with at least two contact openings, at least two printed circuit board contact elements, each of which has a plug end and a connection end, the plug end being plugged into the contact opening in the first printed circuit board, a second printed circuit board with at least two contact openings, wherein the connection ends of the printed circuit board contact elements are secured, preferably screwed, to a contact opening in the second printed circuit board, and a plastic housing which is mounted on the first printed circuit board and in which the printed circuit board contact elements are movably mounted.