A brief introduction to Pogo Pin

　　Pogo English literal translation is the meaning of seesaw, Pin is usually a small pointer-shaped object. Pogo pin is a small elastic needle with a spring, referred to as a pogo pin.

　　HP designed the first pogo pin more than 20 years ago, and registered a trademark. It is used in the HP-designed printer for the signal connection between the boards, reducing the trouble of cable connection, making the connection easier, and making the The internal circuit is cleaner and more refreshing.

　　Pogo Pin looks like a simple part, but if there is no good quality control and perfect manufacturing process level, it is very prone to power failure, stuck pin, or short durability (life). The process is extremely delicate and complex. From lathe processing, electroplating, and assembly, each process may bring serious hidden dangers.

　　In terms of Pogo pin lathe processing, it is recommended to use Japanese automatic core-moving lathes for processing, so that the precision of the parts can be guaranteed within +/-0.01mm, but most factories use tool-feeding machines for processing, and there is no way to guarantee the accuracy. Second, the surface finish of lathe processing, especially the inner surface finish of the needle tube is very critical. The vast majority of factories do not have surface roughness testing equipment and do not monitor this important parameter at all.

　　In terms of Pogo pin electroplating process, the thickness of the coating has a huge impact on the cost structure. Good quality gold plating is 16~20u”, but most other brands are 1~2u”, the gap is very large. Secondly, the quality of gold plating in the hole also has a great influence on the electrical properties (dynamic impedance) and mechanical properties of the product.

　　The process of pogo pin assembly is equally important. Poor assembly process can lead to serious problems such as skewed needle, too large gap between needle height and length, stuck pin, peeling of the tube orifice, etc.

　　Pogo pin is a precision connector used in electronic products such as mobile phones, and is widely used in semiconductor equipment for connection.

　　There are different appearances depending on the application, but as a whole there is a precision spring structure inside the pogo pin. The surface of the product is generally gold-plated, and the unit price of the product is generally about 5 to 1 yuan.

　　The thimble is energized or turned on, most of which are in contact with the copper wall through the oblique downward direction, and the spring bears a small amount, so the inner wall of the copper sleeve is required to be smooth. If the POGOPIN factory makes a non-beveled surface, but the bottom is flat, most of the current must be conducted through the spring, and the requirements for the spring will be very high. Of course, it is necessary to ensure that the power outage occurs when the current suddenly increases. (This is a little bit of my experience in the actual use process)

　　Pogo pin is a spring-type probe formed by riveting and pre-pressing the three basic components of needle, spring and needle tube by precision instruments. There is a precise spring structure inside. The surface coating of pogo pin is generally gold-plated, which can better improve its anti-corrosion function, mechanical properties, electrical properties, etc. Pogo pins are generally used in precision connections in mobile phones, communications, automobiles, medical, aerospace and other electronic products, which can improve the corrosion resistance, stability and durability of these connectors. Since the pogo pin is a very fine probe, it can be used in precision connectors to reduce the weight of the connector and the volume of its appearance, which can make the connector more fine and beautiful.

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