Structural Principle of Double - Ended Pogo Pins

　　The structural principle of double - ended pogo pins is based on a combination of mechanical and electrical design concepts. A typical double - ended pogo pin consists of several key components: a barrel, a spring, a plunger (pin), and two contact tips.

　　The barrel serves as the housing for the internal components. It is usually made of a rigid material, such as brass or stainless steel, and provides structural support and protection for the spring and plunger. The barrel also has a precise internal diameter to ensure a proper fit for the spring and plunger, allowing for smooth movement.

　　The spring is the core mechanical component that provides the necessary contact force. When the pogo pin is compressed during mating, the spring stores mechanical energy. This stored energy generates a force that presses the contact tips against the mating surfaces, ensuring a reliable electrical connection. The spring's characteristics, such as its spring rate and free length, are carefully designed to provide the optimal contact force for different applications.

　　The plunger, or pin, is the movable part of the pogo pin. It is usually made of a conductive material, such as beryllium copper, and has a contact tip at each end. The plunger slides within the barrel under the action of the spring. When the pogo pin is in its relaxed state, the plunger extends out of the barrel due to the spring force. When mated with a surface, the plunger is compressed into the barrel, and the contact tips make electrical contact with the mating surfaces.

　　The contact tips are critical for electrical conductivity. They are often plated with precious metals, such as gold or nickel, to enhance conductivity, reduce oxidation, and improve wear resistance. The shape and surface finish of the contact tips are designed to maximize the contact area and minimize contact resistance. The structural design of double - ended pogo pins allows for easy mating and demating, providing a reliable and flexible electrical connection solution in a wide range of electronic devices and systems.

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