Rivet Blank Ventilation Filter for Printed Circuit Base Plate
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Solution Overview
Problem
The challenge lies in positioning rivet blanks on base plates for protective cases of printed circuits without causing cracks or material thickness reduction during the riveting process, while also ensuring proper ventilation and minimizing restrictions on electronic component placement.
Innovation Solution
The solution involves integrating rivet blanks with an internal tube into the ventilation filter, allowing the rivet to serve both as a connection point and a ventilation component, with the internal tube extending through the rivet blank and into the ventilation filter, enabling easier formation and reducing stress on the material during stamping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If rivet blanks are placed on flat areas of the base plate, then the riveting operation can be simplified, but the material of the rivet blanks is more stressed and cracks are more likely to occur
Solution Approach 1:
The patent combines the rivet blank with the ventilation filter by making the rivet blank integral to the filter structure. The ventilation filter is positioned over a stamping area where rivet blanks are formed, and the rivet blanks extend through the filter, merging two functional elements into a single integrated component.
Solution Approach 2:
The ventilation filter is pre-positioned on the base plate before the rivet blanks are fully formed and riveted. The filter is held in place by the protruding rivet blanks during the stamping process, allowing the riveting operation to proceed while the filter provides structural support and reduces stress concentration.
2Reliability
If rivet blanks are placed in thermal platform areas, then material stress is reduced and crack risk is lowered, but electronic components cannot be placed in these restrictive areas
Solution Approach 1:
The ventilation filter serves multiple functions: it provides ventilation for the electronic components, acts as a structural support during the riveting process, and defines a safe zone for rivet blank placement. By integrating the rivet blanks with the filter structure, the design eliminates the need for separate thermal platform areas, allowing electronic components to be placed more freely on the base plate.
3Quantity of substance
If the ventilation filter is positioned to provide adequate ventilation, then air flow is improved, but the placement of rivet blanks is restricted
Solution Approach 1:
The rivet blanks and ventilation filter are merged into a single integrated structure. The rivet blanks extend through the filter, and the filter is positioned over the stamping area where the blanks are formed. This integration allows the ventilation openings to be positioned exactly where needed for optimal air flow, without constraining rivet blank placement.
Data Source
AI summary
Disclosed is a base plate (1) and the protective case of a printed circuit. The plate includes a ventilation filter (4) and at least one rivet blank (5) projecting from the plate and intended to penetrate the printed circuit and to be deformed for rigidly connecting the printed circuit to the base plate by projecting from a face (1a) of the plate, the filter including at least one ventilation opening (6). The rivet blank is borne by the filter and includes an internal tube (7) passing right through the rivet blank in the projecting direction thereof, the internal tube opening, on one side, onto an end of the rivet blank that projects furthest from the plate while forming the ventilation opening and, on the other side, into the ventilation filter.