The contact terminal is the core component of a connector that enables electrical connection, including male and female contacts. The transmission performance, environmental performance, and service life of connectors will vary depending on the geometric shape of the elastic structure at the contact point of the connector.
Wire spring hole contact terminal
The wire spring socket consists of three parts: an inner sleeve, metal wire, and an outer sleeve. The inner sleeve is responsible for supporting metal wires. Several metal wires form a certain angle along the longitudinal axis of the inner sleeve and are straightened. The two ends of the inner sleeve are bent and groove the two ends, forming a single blade rotating hyperbolic spring socket with large two ends and small middle. Several elastic metal wires are evenly distributed in this socket, which is equivalent to several pairs of contact parts used in parallel, greatly improving reliability. This socket has high contact reliability, stable insertion and extraction force, low contact resistance, and is less prone to failure in various types of sockets. The printed circuit connectors of TXGA use wire spring sockets.
Twisted wire (Fried Dough Twists) pin contact terminal
The twisted wire pin is a flexible pin, consisting of three inner rings and seven outer rings of copper wires twisted in reverse with different pitches, and welded at both ends. The middle part of the pin is raised, and the diameter of the outer circle of the raised part is greater than the inner diameter of the socket. During operation, the protruding part of the pin is subjected to compression deformation and axial rotation elongation, forming a seven point tight contact with the socket. Twisted wire pins have good elasticity and contact performance, soft insertion and extraction, vibration resistance, impact resistance, and are easy to achieve higher density pin layout. For example, TXGA's micro D-shaped connector uses twisted wire pins.
Crown spring hole contact terminal
The crown spring socket is composed of a spring plate and a sleeve. When inserting, it relies on the elastic force of the internal spring plate of the crown spring structure to clamp the pin and achieve multi-point contact with the pin. It has the characteristics of low cost, high lifespan, good elasticity, and supports users to plug and unplug with electricity. The power connector of the TXGA charging station module uses a crown spring socket.
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