PCB Edge Connector Stress Isolation via Slot Segmentation
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Solution Overview
Problem
Conventional printed circuit boards (PCBs) experience harmful bending due to edge connector displacement, which applies stress to components like ceramic capacitors and integrated circuits, and traditional solutions like cables add complexity and require additional space.
Innovation Solution
Incorporating slots on the PCB to create an isolated area that bends relative to the main section, localizing the bending and reducing stress on components by defining an axis about which the isolated area can flex, thereby isolating sensitive components from stress caused by edge connector connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If edge connector is connected to mating connector, then electrical connectivity is achieved, but bending stress is applied to PCB components
Solution Approach 1:
The PCB is segmented into a rigid main section and a flexible isolated area by introducing slots that divide the board structure. This segmentation allows the isolated area to bend independently while the main section remains stable, protecting components from bending stress during connector connection.
Solution Approach 2:
The flexible isolated area is extracted as a distinct functional zone from the rigid main PCB section. By removing material through slots and creating a separate bendable region, the harmful bending effects are isolated to this extracted area, preventing stress transmission to mounted components.
2Object-affected harmful factors
If traditional cabled solution is used to eliminate PCB bend, then bending stress on components is reduced, but device complexity and space requirements increase
Solution Approach 1:
The solution merges the stress-isolation function directly into the PCB structure by integrating the flexible isolated area with the board itself. This eliminates the need for separate external cables and connectors, reducing device complexity while maintaining the bending protection function.
Solution Approach 2:
The PCB structure provides its own bending isolation capability through the integrated flexible isolated area with slots. The board serves its dual purpose of electrical connectivity and stress isolation without requiring external assistance from additional cables or mechanical components.
3Stability of the object's composition
If PCB is made rigid to support components, then component stability is improved, but connector displacement causes harmful bending
Solution Approach 1:
Different regions of the PCB are given different mechanical properties: the main section maintains rigidity to support components stably, while the isolated area is made flexible through slot introduction to accommodate connector displacement. This local differentiation of structural quality allows both component stability and bending isolation to coexist.
Data Source
AI summary
Printed circuit boards (PCB's) with edge connectors undergo bending stresses whenever the edge connectors are plugged into mating connectors. The bending stresses causes deformation of the printed circuit board, which can have deleterious effects on electrical components thereon. Slots are provided on the PCB to enable the portion of the PCB surrounding the edge connector to bend relative to the remainder of the PCB, thereby confine the bending to a localized area between the ends of the slots, and isolate the electrical components from any stresses caused thereby.