SMD Connector Contact Geometry for Preserving Solder Paste
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Solution Overview
Problem
Existing connector devices for SMD-fitted circuit boards face challenges in soldering capacity, compact design, and reliable handling, particularly in automation sectors where miniaturization demands improved connectivity solutions.
Innovation Solution
A connector device with an SMD-capable contact geometry featuring a housing with parallel side walls and spring arms, allowing for easy attachment to circuit boards and maintaining a soldering gap, while using spring clips for secure conductor connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional contact geometry is used, then the connector device can be pushed onto the circuit board, but the solder paste on the contact faces is removed or pushed away, compromising soldering quality
Solution Approach 1:
The contact geometry features localized contact projections at specific points on the spring arm rather than continuous line contact. This local quality approach ensures that only minimal areas contact the solder paste, preserving the overall solder paste coverage on the contact face while still achieving reliable electrical connection and mechanical insertion.
2Volume of moving object
If the connector device is miniaturized for SMD components, then compact design is achieved, but the soldering capacity and handling reliability must be improved
Solution Approach 1:
The spring arm provides dynamic elasticity that compensates for tolerances in miniaturized components. The spring mechanism allows the contact projection to maintain reliable contact pressure despite the reduced size, ensuring consistent soldering capacity and handling reliability while achieving compact dimensions suitable for SMD applications.
3Manufacturing precision
If point contact geometry is used, then solder paste is preserved on the contact face, but the contact area is reduced
Solution Approach 1:
The spring arm is pre-loaded with elastic force that ensures the contact projection maintains consistent pressure on the contact face during insertion and operation. This preliminary action compensates for the reduced contact area of point contact, ensuring reliable electrical connection and mechanical stability while preserving solder paste coverage.
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 solution provides a compact, easy-to-handle connector device that ensures reliable soldering by preserving flux or solder paste on contact faces, facilitating precise and stable connections without displacement during the soldering process.
Implementation Method 1
at least one first circuit board contact (4) with one contact projection (20) and at least one second circuit board contact (4') with one contact projection (20'), wherein the contact projections (20, 20') facilitate easy insertion onto the circuit board contact faces (6) while maintaining the required soldering gap
Implementation Method 2
a spring clip (10) and a circuit board contact (4, 4')
Data Source
AI summary
A connector device for connecting at least one electrical conductor to at least one electrically conducting contact face of a circuit board includes a housing, at least one first connection unit and at least one second connection unit. The connector device has a SMD-capable contact geometry. The SMD-capable contact geometry has at least one first circuit board contact and at least one second circuit board contact with one spring arm having a respective contact projection.