Backplane Connector Guiding Elements for PCB Insertion
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Solution Overview
Problem
Existing backplane connectors face issues with smooth insertion and secure retention of PCB expansion cards, leading to signal transmission failures due to misalignment and structural weaknesses, resulting in increased tolerance, deformation, and reduced durability.
Innovation Solution
A backplane connector design featuring guiding elements, including curved and angled protruding elements on signal transmission terminals, which facilitate smooth insertion and secure locking of PCB expansion cards, along with transverse partitions and a longitudinal spine for enhanced structural strength and heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional contact modules are arranged abreast in a row, then the backplane connector can be manufactured, but the total tolerance exceeds reasonable expectations causing deformation and loosening
Solution Approach 1:
The connector is divided into a housing and multiple terminal assemblies that are pre-assembled units. Each terminal assembly includes insulating bases and signal transmission terminals that are manufactured separately and then integrated into the housing, allowing individual precision control and reducing cumulative tolerance
Solution Approach 2:
Terminal assemblies are pre-assembled with precise positioning features before being installed in the housing. The insulating bases and signal transmission terminals are prepared in advance with built-in alignment mechanisms, ensuring that when assembled, the total tolerance remains within reasonable limits
2Strength
If the housing is implemented without crossbeam structures, then the manufacturing is simpler, but the structural strength is insufficient to protect contact modules
Solution Approach 1:
The housing structure is segmented into multiple functional regions including top, bottom, and side walls with integrated mounting positions. Terminal assemblies are distributed throughout the housing volume rather than concentrated in one area, providing structural reinforcement without requiring additional crossbeam elements
Solution Approach 2:
The housing serves multiple functions simultaneously: it provides structural strength to protect terminal assemblies, defines the expansion slot opening, provides mounting positions for terminal assemblies, and maintains overall connector geometry. This multi-functionality eliminates the need for separate crossbeam structures
3Quantity of substance
If contact modules are arranged abreast together, then the connector can accommodate multiple contacts, but the cumulative tolerance causes deformation and loosening
Solution Approach 1:
Multiple signal transmission terminals are organized into separate terminal assemblies that are distributed within the housing volume. Each terminal assembly maintains its own tolerance boundaries, preventing cumulative tolerance effects that would occur with linear abreast arrangement of all contacts
Solution Approach 2:
Instead of arranging all contacts in a single linear row (one dimension), the terminal assemblies are distributed in three-dimensional space within the housing. This spatial distribution allows multiple contacts to be accommodated while maintaining individual tolerance control through vertical and depth-wise separation
4Reliability
If guiding elements are added to signal transmission terminals, then insertion is facilitated and disengagement is prevented, but the manufacturing complexity increases
Solution Approach 1:
The guiding elements are integrated directly into the signal transmission terminals as part of the same manufacturing process. The curved guide elements and angled protruding elements are formed as integral features of the terminals rather than separate components, providing guidance and retention functions without significantly increasing manufacturing complexity
Solution Approach 2:
The signal transmission terminals perform multiple functions: electrical signal transmission, insertion guidance through curved guide elements, and disengagement prevention via angled protruding elements. This multi-functionality is achieved within the terminal structure itself without requiring separate guiding and locking mechanisms
Data Source
AI summary
A backplane connector has a housing and multiple terminal assemblies. The housing has a top, a bottom and an expansion slot defined in the top. The terminal assemblies are mounted in the bottom of the housing and each terminal assembly has a first insulating base, a second insulating base and two pairs of signal transmission terminals. The first and second insulating bases are connected to each other. The pairs of the signal transmission terminals are mounted respectively through the first and second insulating bases. Each signal transmission terminal has a curved guide element and an angled protruding element. The curved guiding elements smoothly contacts and guides an electrical connecting portion of a PCB expansion card to move so that the PCB expansion card is installed easily in the expansion slot of the backplane connector.