Floating Connector Contact Geometry for Dense-Pitch Impedance Matching
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Solution Overview
Problem
Existing floating type connector assemblies face challenges in manufacturing and impedance matching due to the complexity of contact shapes and dense pitches, which affect both the manufacturing properties and the electrical connection stability, especially when dealing with relative position shifts between circuit boards during assembly and vibration.
Innovation Solution
The contact design includes a press-fitting portion, a pushing protrusion, and widened regions that allow for increased width and clearance, enabling stable press-fitting and impedance matching while accommodating relative displacement between circuit boards, thereby enhancing manufacturing efficiency and connection stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If contacts are bent to complex shapes to accommodate relative position shifts, then adaptability improves, but manufacturing complexity increases
Solution Approach 1:
The contact is divided into distinct functional segments: a press-fitting portion for secure mounting, a pushing protrusion for insertion guidance, and a bent portion for elastic deformation. This segmentation allows each part to perform its specific function independently, simplifying manufacturing while maintaining adaptability to position shifts.
Solution Approach 2:
Different portions of the contact have different geometric properties optimized for their specific functions. The press-fitting portion has a width and depth designed for secure retention, the pushing protrusion has a specific projection geometry for guidance, and the bent portion has elastic characteristics for adaptation. This local optimization reduces overall manufacturing complexity while preserving adaptability.
2Quantity of substance
If contact pitches are made denser to increase connection density, then quantity of connections improves, but manufacturing precision requirements increase
Solution Approach 1:
The contact design incorporates a pushing protrusion that projects beyond the press-fitting portion in the width direction. This geometric parameter change creates a self-aligning mechanism during insertion, allowing dense pitch arrangements without requiring extremely tight manufacturing tolerances. The protrusion guides the contact into proper position, compensating for minor variations in pitch spacing.
3Reliability
If contact width is increased for better impedance matching, then electrical performance improves, but space for dense pitches decreases
Solution Approach 1:
The contact design utilizes the width direction effectively with the pushing protrusion projecting beyond the press-fitting portion. This dimensional arrangement allows the main body of the contact to maintain sufficient width for good impedance matching and electrical performance, while the protrusion extends in a different spatial relationship to provide guidance functionality without significantly increasing the overall footprint, thereby preserving pitch density.
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
The proposed contact design improves manufacturing properties and impedance matching, ensuring stable electrical connections even under conditions of relative displacement and vibration, while maintaining a sufficient floating range for assembly tolerance.
Implementation Method 1
the bent contact elastically deforms so that problems do not arise in the assembly of the first circuit board and the second circuit board due to tolerance in assembly
Data Source
AI summary
A contact comprises a press-fitting portion, a pushing protrusion and a first widened region. The press-fitting portion is adapted to be press-fitted to a press-fitting target in a press-fitting direction. The pushing protrusion projects out to one side in a width direction intersecting the press-fitting direction on a back side of the press-fitting portion in the press-fitting direction. The pushing protrusion projects out beyond a position of the press-fitting portion to the one side in the width direction. A pushing surface on the back side of the pushing protrusion is opened to the back side in the press-fitting direction. The first widened width region continues on the back side of the pushing protrusion, is located closer to another other side in the width direction with respect to the press-fitting portion, and is wider in the width direction than the press-fitting portion.