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D-sub connectors, also known as D-shaped connectors, are one of the most extensively used connectors in today\'s electronic industry. The shape of the connector consists of two pieces, that are a D-shaped plug and a quadrilateral receptacle, that are connected by a series of contact pins that are located either at the center of the connectors, or on the exterior of the type. In either cases, the contacts will meet, connecting the two pieces and creating a secure connection.

The design of the D-sub connectors is highly versatile and improves the effectiveness of the connection that are made due to its sturdy construction, low cost and simple capabilities. It is available in different contact configurations ranging from 9 pins to as many as 150 pins. The number of contacts can vary based on the usage requirements. D-sub connectors move the contacts in and out of the rectangular cavity, achieving a precise and secure connection.

D-sub connectors have been used for decades and are well-known for their application in electric, telecommunications, networking and video cables. The most typical applications of D-sub connectors are found in computer and automobile industries, as well as in medical, professional audio and video equipment. In the computer industry, D-sub connectors are most famously used for monitor cables and external hard drives.

The working principle of D-sub connectors is relatively simple. When connecting two pieces of D-shaped plugs and/or receptacles, the contact pins are pushed into the connector and compression force is applied to the pins. The force of the pins against the surfaces ensures a secure connection, while also eliminating the possibility of the pins slipping out and causing a short circuit. The contacts’ shapes also play an important role in maintaining connection integrity, as the contact points should be twisting, pushing and sliding into place, ensuring a complete connection.

In conclusion, D-shaped connectors, or D-sub connectors, are versatile electrical connectors that have been used for decades in electric, telecommunications, networking and video cables. The design of the connectors allows them to move the contact pins in and out of the rectangular cavity, creating a secure and precise connection. The working principle is relatively simple, in which compression force is applied to the pins, allowing them to twist, push and slide into place, creating a secure connection. With its sturdy construction, low cost and simple capabilities, D-sub connectors are among the most widely used connectors.

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