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D-Sub Connectors

The D-sub connector, also referred to as the D-subminiature connector, is an electronic connector. It is widely used in computers and peripheral devices for connecting various devices such as keyboard, monitor, and mouse. Its application field and working principle are introduced in this article.

Application Field

In electronic engineering, those wiring harnesses in computer are mainly composed of D-sub connectors and round head plugs. The round head plug of such wire harnesses is installed on the corresponding round pins on the main chassis of the computer. The front end of the pin is connected to the internal expanding circuit of the computer through the plug. The rear end of the pin is connected to the external device through the D-sub connector. The application of D-sub connectors in computers are mainly the connecting cables for keyboard, mouse, monitor, serial port, parallel port, and game port.

Working Principle

The working principle of the D-sub connector is mainly divided into four parts, namely connecting system, insulation system, shielding system and grounding system. The connecting system consists of four parts: male contact, female contact, shell and also latch. The male contact is installed in the cavities of the shell body. By its elasticity, it will firmly grasp the female contact. The female contact adopts a box carving structure with a hole connected to the mating pin. The shell is made of an insulating material and welded to the metal shielding cover. The latch design of the shell prevents the connector from disconnecting inadvertently. The insulation system is designed to prevent electromagnetic interference and adjacent cross-talk. The shielding system is used to prevent external electromagnetic interference and to reduce cross-talk generated at high frequency. The grounding system is used to reduce external electromagnetic plane and internal noise coupling.

Conclusion

To sum up, D-sub connectors are widely used in computers and other peripherals due to its reliable and convenient connection. The application field and the working principle of such connectors are outlined in this article. The working principle involves four parts, namely connecting system, insulation system, shielding system and grounding system.

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