Blind-Mate Board-to-Board Connector with Floating Mate Assurance
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Solution Overview
Problem
Existing board-to-board connectors face challenges in ensuring reliable high-speed data transmission and alignment in blind-mate scenarios, where visual confirmation of component alignment is not possible, and traditional screw arrangements can cause damage or fail to accommodate desirable tolerances.
Innovation Solution
A board-to-board connector assembly with a housing containing cabling and spring plungers allowing vertical and horizontal movement, incorporating screw-mount pins with floating caps for alignment, and blind-mate interface sockets with spring plungers to accommodate misalignments and variable distances between substrates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional screw arrangements are used to secure pins, then the connection is mechanically stable, but the substrates may be damaged or alignment tolerances cannot be accommodated
Solution Approach 1:
The connector employs spring plungers that can dynamically adjust their position along the insertion axis, transitioning from a compressed state during insertion to a relaxed state upon full engagement. This dynamic mechanism accommodates alignment tolerances and prevents substrate damage while maintaining secure electrical contact throughout the connection lifecycle
Solution Approach 2:
The spring plungers are pre-compressed within the socket housing before insertion, creating a cushioning effect that absorbs misalignment and prevents damage to the substrate during the mating process. This prior cushioning ensures that even with tolerance variations, the connection remains secure without causing harm
2Manufacturing precision
If rigid fixed-position sockets are used, then manufacturing precision is high, but alignment misalignments cannot be accommodated in blind-mate scenarios
Solution Approach 1:
The spring plunger mechanism transforms the rigid fixed-position socket into a dynamic system that can adapt to misalignments. The plungers move vertically along the insertion axis, allowing the socket to self-align with the pin even when there are positioning tolerances, thereby maintaining manufacturing precision while gaining adaptability
Solution Approach 2:
The connector changes the positional parameter of the socket dynamically through the spring plunger mechanism. As the plunger compresses and extends, the effective position of the contact point adjusts, enabling the system to accommodate alignment variations while maintaining precise electrical contact
3Device complexity
If variable distances between substrates are not accommodated, then the connector structure is simple, but the connector cannot adapt to different substrate positions
Solution Approach 1:
The spring plunger provides a simple yet effective dynamic mechanism that accommodates variable distances between substrates. The plunger's compression and extension along the insertion axis allow the connector to adapt to different spacing requirements without complicating the overall structure
Solution Approach 2:
The spring plunger mechanism introduces movement along the insertion axis (vertical dimension), allowing the connector to accommodate distance variations in that dimension while maintaining a relatively simple planar structure, effectively adding adaptability without proportionally increasing complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Ensures reliable, high-performance cable connections with full mate assurance, minimizing signal degradation and risk of damage, even in scenarios without direct visual alignment, by accommodating misalignments and tolerances.
Implementation Method 1
The first socket and the second socket include at least one spring plunger that permits movement in a vertical direction
Implementation Method 2
The first cap has a float that permits movement in a horizontal direction
Data Source
AI summary
A high-speed blind-mate board-to-board cable assembly includes a housing with cabling stored therein, configured to be positioned between two substrates. The housing comprises pin receptacle portions for receiving pins from one substrate. The assembly also includes a first socket and a second socket, each equipped with at least one spring plunger, allowing vertical movement to accommodate variable distances between the substrates. The housing also includes floats permitting horizontal movement of the pins. The sockets are configured to couple the cabling to the respective substrates. The assembly provides a high-performance cable connection between two stacked substrates (e.g., printed circuit boards), providing full mate assurance and minimizing risk of performance degradation.