PCB connector connection

PCB connector connection

    A PCB as an integral part of the whole machine generally cannot constitute an electronic product, and there must be a problem of external connection. Electrical connections are required between PCBs, between PCB and off-board components, and between PCBs and device panels. The choice of the best combination of reliability, process and economy is one of the important aspects of PCB design. Discuss the connection of the PCB connectors today.

In more complicated instruments and equipment, the connector connection method is often used. This "building block" structure not only ensures the quality of the mass production of the product, but also reduces the cost of the system, and provides convenience for debugging and maintenance. When the equipment fails, the maintenance personnel do not have to check the component level (that is, check the cause of the failure, trace the source to the specific components. This work takes a considerable amount of time), as long as it is determined which board is not normal, It can be replaced immediately, troubleshooting in the shortest time, reducing downtime and increasing equipment utilization. The replaced circuit board can be repaired in a sufficient amount of time and used as a spare part after repair.

1, standard pin connection

    This method can be used for external connection of PCBs, especially in small instruments. The two PCBs are connected by standard pins, and the two PCBs are generally parallel or perpendicular, which is easy to achieve mass production.

2, PCB socket

    In this way, the printed plug is made from the edge of the PCB, and the plug part is designed according to the size of the socket, the number of contacts, the distance of the contact, the position of the positioning hole, etc., so as to match the dedicated PCB socket.

When making the board, the plug part needs to be gold-plated to improve the wear resistance and reduce the contact resistance. This method is simple to assemble, interchangeable, and has good maintenance performance, and is suitable for standardized mass production. The disadvantage is that the PCB cost is increased, the PCB manufacturing precision and process requirements are high; the reliability is slightly poor, often due to poor oxidation of the plug portion or aging of the socket reed. In order to improve the reliability of the external connection, the same lead wire is often taken in parallel through the contacts on the same side or both sides of the circuit board.

    The PCB socket connection method is often used for multi-board structure products, and the socket and the PCB or the bottom plate have two types of reed type and pin type.