The cable connection between the two PCB printed boards is not easy to present connection errors, and the relative orientation of the two PCB printed boards is not constrained.
Direct welding between printed boards, this method is often used for the connection between two printed boards at an angle of 90 degrees. After the connection, it becomes a whole PCB printed board component.
PCB circuit board interconnection method two: plug-in connector connection method
In more complex instruments and equipment, the plug-in connection method is often selected. This "building block" structure not only ensures the quality of mass production, reduces the cost of the system, but also provides convenience for debugging and repair. When a device fails, the repairer does not need to look at the component level (i.e., to see the cause of the failure, and trace it back to the detailed components. This work requires a considerable amount of time), and it is only necessary to identify which board is abnormal and replace it immediately, eliminating faults in the shortest possible time, reducing downtime and improving the utilization rate of equipment. The replaced circuit board can be repaired in sufficient time and used as a spare part after repair.
1. Printed board socket
In more complex instruments and equipment, this connection method is often used. This method is to make a printed plug from the edge of the PCB printed board, and the plug part is planned according to the size of the socket, the number of contacts, the contact spacing, the orientation of the positioning hole, etc., so that it is matched with the special PCB printed board socket.
In the process of making plates, the plug part needs to be plated with gold to improve wear resistance and reduce contact resistance. This method is simple to assemble, interchangeable, good repair performance, and suitable for standardized mass production. Its disadvantage is that the cost of printed board is advanced, and the manufacturing accuracy and process requirements of printed board are high; The reliability is slightly poor, and the contact is often poor due to the oxidation of the plug part or the aging of the socket reed. In order to advance the reliability of the external connection, the same lead wire is often drawn out in parallel through the contacts on the same side or both sides of the circuit board.
The PCB printed board socket connection method is often used in products with multi-board structure, and the socket and the printed board or bottom plate have two types: reed type and pin type.
2. Standard pin connection
This method can be used for the external connection of the printed board, especially in small instruments, the pin connection is often used. The two printed boards are connected through standard pins, and the two printed boards are generally parallel or perpendicular, which is simple to achieve mass production.
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