According to WIKI explanation, “The Pogo pin is a device used in an electronic device for establishing (usually a temporary) connection between two printed circuit boards. By naming pogo stick with toys, pogo pins are usually taken in an elongated cylindrical form, containing two sharp spring-loaded pins. Between the two electronic circuits, the tip of each end of the pogo pin forms a strong contact with the two circuits, connecting them together.”
Pogo Pin has many different designs, but the typical design can be used in three-piece design and four-piece design. The three-piece design includes the top, which also serves as a probe for the tube or barrel; a moving bottom tip and a spring. The four-piece design consists of two moving probe heads, a spring and a tube (barrel), usually longer and narrower than the three-piece type.
All Pogo pins from CFE provide long contact life (up to 10,00,000 cycles). They can be configured to cover a variety of sizes and spaces as well as a range of compliance and are sold separately.
We can also provide different unconventional Pogo pin design features for probes and springs by using a change in helical diameter within each individual spring. The opening of each individual spring is reduced from the top to the bottom of the spring.
Pogo Pin Design Feature
Another unconventional Pogo pin design feature of the probe and spring is the change in the diameter of the screw within each individual spring. The opening of each individual spring is reduced from the top to the bottom of the spring.
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The wider top is more receptive to the probe, while the narrower bottom is reduced to just above the diameter of the bottom of the plunger. To achieve a “reduced diameter” while keeping the wire’s closed coil design to form a “solid tube” in a closed position – unlike a bucket. The coil is not compressed to the solid height of the spring.
When the DUT is in contact with the top of the probe, the probe is inserted in a manner that frictions with the narrowly closed coil portion of the spring, contacting the spring at the bend of the spring. The current path now flows through the plunger to the closed portion of the spring, or through the center of the contact.
User requirements, such as lower pin pitch on BGA and leadless devices, have contributed to many advances in the test socket industry. Although ideal for many conventional applications, three-piece and four-piece pogo pin can not provide new two-piece probes and spring contacts for ease of installation and maintenance, or increased cost reductions.
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