POGOPIN classification.Right Angle Pogo Pin 9P

　　1. Flat bottomed pogopin

　　The needle head of this structure is flat bottomed, easy to process, lower in cost, and has good coaxiality with the needle tube. However, there is a high risk of non-contact and power failure between the needle head and the needle tube, and the contact impedance of the product is also very high. This type of product structure is usually only used in situations where the product requirements are very low and the current is very low. Nowadays, formal large companies do not adopt this type of product structure

　　2. Slope plane pogopin

　　The needle head of this structure is a sloping surface, with complex processing and high cost, and the coaxiality of the needle head and needle tube is poor. However, the contact between the product needle head and the needle tube is good, and the contact impedance is also very small. The main reason is that the spring has a lateral force component on the needle head elasticity, making the needle head and needle tube stably in contact. This structure is widely used in pogopin factories, only in situations with low current.

　　3. Steel Ball Pogopin

　　The needle of this structure is a sloping surface, and an additional steel ball is added below it. This structure has complex processing, high cost, and poor coaxiality of the needle tube, occupying a large space of the needle tube. However, the product has good contact between the needle and the needle tube, and the contact impedance is also very small. The main reason is that the spring has a lateral force on the needle elasticity, which makes the needle and the needle tube stably connected. The steel ball also adds a current flow channel. This structure is widely used in pogopin factories, only in situations with medium to high currents.

　　4. Inner sleeve pogopin

　　The needle tip of this structure is a sloping surface, and an inner sleeve is added below it. This structure has complex processing, high cost, and poor coaxiality of the needle and needle tube, occupying relatively less space compared to the steel ball type needle tube. However, the product has good contact between the needle and the needle tube, and the contact impedance is also very small. The main reason is that the spring has a lateral force on the needle elastic force, which makes the needle and the needle tube stable in contact. The inner sleeve also adds a current flow channel. This structure is widely used in pogopin factories, only in situations with medium to high currents.

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