What Are The Connection Methods Of PCB Connectors

Publish Time: January 05,2019

As a component of the whole machine, a PCB cannot generally constitute an electronic product, and there must be a problem of external connection. For example, between the PCBs, between the PCB and the off-board components, and between the PCB and the device panel, electrical connections are required. It is one of the important contents of PCB design to select the best matching connection of reliability, manufacturability and economy. Today we discuss how to connect PCB connectors.

In the more complicated instruments and equipments, plug-in connection is often used. This "building block" structure not only ensures the quality of mass production of products, reduces the cost of the system, and provides convenience for debugging and maintenance. When the equipment fails, the maintenance personnel do not need to check the component level (that is, check the cause of the failure and trace the root cause to the specific component. This work takes a lot of time). As long as it is judged which board is abnormal, it can be replaced immediately to eliminate the fault in the shortest time, shorten the downtime, and improve the utilization rate of the equipment. The replaced circuit board can be repaired within a sufficient time and used as a spare part after repair.

1. Standard pin connection

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

2. PCB socket

This method is to make a printed plug from the edge of the PCB. 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 that it matches the special PCB socket.

When making a board, the plug part needs to be gold-plated to improve wear resistance and reduce contact resistance. This method is simple to assemble, has good interchangeability and good maintenance performance, and is suitable for standardized mass production. The disadvantage is that the PCB cost is increased, the PCB manufacturing accuracy and process requirements are higher; the reliability is slightly poor, and poor contact is often caused by the oxidation of the plug part or the aging of the socket spring. In order to improve the reliability of the external connection, the same lead-out line is often led 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 products with multi-board structure. The socket and the PCB or the bottom plate have two types of reed and pin.