Micro D connectors often use twisted wire pins (also known as Fried Dough Twists pins) as their core contact parts. This type of pin is made by twisting two layers of copper alloy wire in a reverse spiral manner, with the inner layer containing 3 wires and the outer layer usually consisting of 7 or 9 wires. These two layers of silk are connected at both ends by fusion welding technology to form a unique shape resembling a drum with a handle.
Specifically, a hollow bulge is designed near the tip of the needle. When the pin is inserted into the rigid socket, this bulge will be subjected to positive pressure and undergo elastic deformation. This deformation not only compresses the drum radially towards the axis, but also elongates axially along the direction of the spiral. This deformation creates multiple contact points between the pins and sockets, ensuring stable and reliable electrical contact.
The reason why twisted wire pins can play an excellent role in micro D-shaped connectors is due to their unique structural characteristics. These characteristics not only endow the pins with good resistance to vibration and impact, but also make the miniaturization design of connectors possible. Therefore, twisted wire pins have been widely used in the field of micro D-shaped connectors.
