Electrical Connector Terminal Hooks for Solder Ball Clamping
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Solution Overview
Problem
Existing electrical connectors face inefficiencies in material utilization and assembly complexity due to wide clamping portions and structural deformities under heat, leading to poor soldering effects.
Innovation Solution
The electrical connector features a design with first and second extending portions and hooks that extend downwards and laterally from the base, allowing for efficient material usage and stable solder ball positioning without the need for additional bumps, ensuring effective soldering during reflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the clamping portions are designed in a circular shape to clamp solder balls, then the solder ball clamping function is improved, but the terminal material utilization is reduced due to large width occupation
Solution Approach 1:
The clamping portion is segmented into two separate clamping arms extending in opposite directions from the base, rather than forming a complete circular shape. This segmentation allows the arms to be arranged more compactly on the material belt, improving material utilization while maintaining the solder ball clamping function through the gap between the arms.
2Productivity
If the receiving hole distance is reduced to increase terminal density, then the terminal arrangement density is improved, but the assembly process becomes more complex requiring multiple assembly steps
Solution Approach 1:
The clamping arms are designed with elastic deformation capability, allowing them to flex during the assembly process. This dynamic characteristic enables the arms to adapt to slight variations in positioning and maintain effective clamping even when receiving holes are closely spaced, thereby supporting higher terminal density without proportionally increasing assembly complexity.
3Device complexity
If the insulating body is designed without additional bumps to reduce complexity, then the device structure is simplified, but the solder ball positioning accuracy deteriorates under heat during reflow
Solution Approach 1:
The clamping arms are designed to perform multiple functions: they clamp the solder ball during assembly and simultaneously provide positioning stability during reflow soldering. The elastic deformation capability allows the arms to maintain clamping force and positioning accuracy even under thermal stress, eliminating the need for additional positioning bumps on the insulating body.
Data Source
AI summary
An electrical connector that includes: an insulating body, having a plurality of receiving holes disposed thereon, a plurality of solder balls, respectively received in one of the receiving holes, a plurality of terminals, in which each terminal has a base correspondingly received in one of the receiving holes, a first extending portion and a second extending portion extend downwards from the base, a first hook extends laterally from an end of the first extending portion, a second hook extends laterally from an end of the second extending portion, and the first hook and the second hook respectively hook a periphery of the solder ball under a horizontal center line of the solder ball.