TWS earphone charging pogo pin
The metal contacts in the TWS charging box are called Pogo Pin in English. In this chapter, we will talk about the design of the thimble. Some manufacturers put it on a small board alone, and most of them still directly onboard the thimble on the motherboard. On the TWS earphone charging box, we have seen thimbles of various specifications, including 2, 3, 5, and so on. So what are these thimbles used for?
Two charging pogo pins
The most common on the market, this design can meet the rigid needs of TWS headset charging. The two thimbles are positive and negative, respectively, and are used to transfer the power of the battery compartment of the TWS charging box to the earphone.
The design of three pogo pins is also more common. The solution design is used for the communication between the earphone box and the earphone. The earphone box knows the charging status of the earphone, matches the code, and understands the status of the earphone. For production line testing, you can use the MicroUSB/USB-C interface on the headphone box and automatic test equipment to test the comprehensive indicators of the headphone.
This design of five thimbles takes into account the above two purposes and has more functions. This kind of design can only be seen in high-end TWS Bluetooth headsets, which are relatively rare. In addition to the requirements of three thimbles for scheme design and production line testing, it can also be used for functions such as data transmission in the internal storage of the headset, and firmware upgrade of the headset.