Pogo pins suitable for different current sizes
The pogo pin is the core part of precision connectors used in communication base stations or terminals, automobiles, medical care, drones, industry, aerospace, and other fields. Whether it is a signal or a current, it can be transmitted through this pogo pin. With the development of society, more and more products require high current transmission, rapid charging, and even some products have lightning protection requirements, which also makes the pogo pin's current withstand capability higher and higher. At present, there are the following production technologies for spring thimbles:
1. Flat-bottom spring thimble: The needle of this structure is a flat-bottom type, which is simple to process and has the lowest cost, and the pogo pin and the pogo pin tube is good, but there is a high risk of the needle and the needle tube not contacting and power failure, and the contact resistance of the product is also high. It is very large. Products with this structure are usually only used on occasions where the product requirements are particularly low and the current is particularly small. At present, regular large companies basically do not choose this structure.
2. Beveled spring thimble: The needle of this structure is a beveled surface, the processing is more complicated, the cost is relatively high, and the pogo pin is poor, but the product needle and needle tube are in good contact, and the contact resistance is also very small, mainly because of the spring The elastic force of the needle has a lateral component, so that the needle and the needle tube are in stable contact. This structure is widely used in pogo pin factories and is only used on occasions where the current is small.
3. Steel ball-type spring thimble: The needle of this structure is a bevel, and a steel ball will be added below it. This structure is complicated to process, the cost is relatively high, and the pogo pin and the pogo pin tube is poor, and the space occupied by the needle tube is also large, but the product needle and the needle tube are in good contact, and the contact resistance is also very small, mainly because the spring has an elastic force on the needle tip. A lateral component of force, which allows stable contact between the needle and the needle tube. The steel ball also has an additional current flow channel. This structure is widely used in pogo pin factories and is used in occasions where the current is medium and large.
4. Inner sleeve type spring thimble: The needle head of this structure is beveled, and an inner sleeve is added under it. This structure is complicated to process, the cost is relatively high, and the pogo pin 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 resistance is also very small, mainly because The spring has a lateral component of the needle spring force, which allows for a more stable contact between the needle and the needle tube. The inner sleeve also adds a current flow channel. This structure is widely used in spring thimble factories, and it will be used on occasions where the current is medium and large.
