The pogo pin is the core part of precision connectors used in communication base stations or terminals, automobiles, medical, unmanned aerial vehicles, industry, aerospace and other fields. Both signals and current can be transmitted through this pogo pin. With the development of society, more and more products require high current transmission and rapid charging, and even some products have lightning protection requirements, which also makes the spring thimble more and more resistant to current. At present, there are the following manufacturing techniques for pogo pins:

1. Flat-bottomed spring thimble: The needle of this structure is flat-bottomed, simple to process, low cost, and the needle and needle tube has good coaxiality, but there is a greater risk of the needle and the needle tube not contacting and power failure, and the contact impedance of the product is also Very large, products with this structure are usually only used in occasions where the product requirements are particularly low and the current is particularly small. At present, regular large companies basically do not use this structure product.

2. Sectional bevel spring thimble: The needle of this structure is a sectioned bevel, the processing is more complicated, the cost is relatively high, and the coaxiality of the needle needle tube is poor, but the product needle and the needle tube are in good contact, and the contact impedance is also very small, mainly because of the spring There is a lateral force to the needle elasticity, so that the needle and the needle tube are in stable contact. This structure is widely used in the spring thimble factory, and it is only used in small currents.

3. Three, steel ball spring thimble: This structure needle is a cut bevel, and a steel ball will be added under it. This structure is complicated to process, the cost is relatively high, and the coaxiality of the needle needle tube is poor, and the needle tube space is also large. However, the product needle and the needle tube are in good contact, and the contact impedance is also very small. The main reason is that the spring has an elastic force on the needle. The lateral force component allows stable contact between the needle and the needle tube. The steel ball also adds a current flow channel. This structure is widely used in spring thimble factories, and it will be used in situations where the current is medium and large.

4. Inner sleeve spring thimble: The needle of this structure is a cut bevel, and an inner sleeve is added under it. This structure is complicated to process, the cost is relatively high, and the coaxiality of the needle needle tube is relatively poor, and the space occupied by the needle tube is smaller than that of the steel ball type, but the product needle and the needle tube are in good contact, and the contact impedance is also very small, mainly because The spring has a lateral force on the elastic force of the needle, which makes the needle and the needle tube more stable in contact. The inner sleeve also adds a current flow channel. This structure is widely used in spring thimble factories, and it will be applied to the occasions where the current is medium and large.