A few design thoughts on electronic connectors

Often the importance of connectors in electronic systems is often underestimated. Many designers of electronic systems have had the experience of using the cheapest connector available, but often end up paying a higher cost. The wrong choice and use of connectors can result in systems that do not operate properly, product recalls, product liability cases, circuit board damage, rework and repairs, which in turn can result in lost sales and customers. Therefore, please do not underestimate the importance of connectors when designing electronic products, or you will only be making up for a small loss. It can be seen that the importance of choosing a suitable connector for electronic devices. So, how to choose the connector? In doing the design is to take into account the cost factor, but in addition, should pay more attention to the high quality and stability of the product, as well as the connector's own design features. I think we can through the following aspects of the innovative design of the ERNI connector for electronic designers to provide some reference: First: dual-pole design ideas in the ERNI connector series in the dual-pole design ideas are throughout. Figuratively speaking, the double-rod design can be said to "kill two birds with one stone". Optimized terminal design to adapt to high-speed signal transmission, providing a higher directional tolerance. In terms of inductance, capacitance, and impedance comparisons, the twin-rod terminal is smaller than the box terminal configuration for high-speed applications and optimized for minimal discontinuity. The twin-rod design allows multiple connectors on a board without plugging or shorting problems, eliminating the need for a large number of signals on a single connector. The simple alignment of the twin bars saves space, allowing for smaller connectors and simplified inspection of solder pins. For example, putting 12 on a board. It also reduces rework costs. Practical applications such as telecommunications end-user equipment. Second: the assembly process without Col bend pin design traditional stamping due to improper handling will cause bending or deformation of the pin, the bending process will cause hairline cracks, from the product long-term undesirable, but also affect the circuit performance and cost. ERNI adopts the direct stamping of curved corners. Stamped terminals can avoid the hairline cracks caused by the bending process and ensure complete electromechanical connections. Pin coplanarity, control to a tolerance of ± 0.05mm, the surface mount pin coplanarity test to ensure the reliability of the circuit board assembly process, to ensure good soldering, improve product quality, reduce costs. And improve the firmness of the right-angle connector to prevent the connector from being damaged due to improper operation, with "unbreakable" to describe very apt. It is particularly suitable for inkjet printer controllers and InterfaceModule interfaces. Third: high retention force of the surface paste design for SMT products, it is generally recognized that the board's retention force is very poor. Is it possible that the surface paste termination of the PCB holding power than through-hole termination of low? The answer is: not necessarily. Through the design improvement is effective in improving the retention force of the PCB. If the soldering bracket, surface mounted pin holes (microvia), large solder pads can be superimposed on the three aspects to improve retention. In fact, even I/O connectors can use surface mount pins. This can be compared to the image of "rooted". For example, X-ray machines, ultrasonic scanners, robotic Ethernet switch design. Four: Rugged design to determine the connector's reliability, while allowing the use of flat block crimping tool, pole plate fixed to the shell to improve the ruggedness, to achieve a superior manufacturing process, improve yield. In a word, "rock solid". Specific applications include positron emission tomography scanners, embedded systems in railroad cars, etc. Fifth: high-current, small-pitch design with automotive electronics, consumer electronics miniaturization requirements, the need to consider high-current, small-pitch design concept. Sixth: advanced latch design. ERNI uses double latch design to meet different needs, positive latch for strong vibration application design, it is very suitable for automotive and subway applications, friction latch is designed for general vibration applications. The double latch double safety insurance ensures a reliable connection, and no special tools are required for on-site removal (repair/replacement) of the cable. Ideal for applications such as monitors, LED headlights and other designs.

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