What is D-type connector and who are the domestic and international manufacturers of D-type connector?

The D-type connector is a type of connector commonly used in electronic equipment and computer systems. Its name comes from its shape, which takes on the shape of the letter D. The D-type connector consists of a center plug and two side grommets that rotate to lock the connector in place.The D-type connector was originally developed by Cannon in 1952 to transmit signals and power in computers and other electronic devices. Its shape was designed to facilitate plugging, unplugging and connecting, and to provide a strong connection and stable signal transmission. The D-type connector was initially used in a wide range of computer systems and data communications equipment, such as serial interfaces, parallel interfaces, printer ports, keyboard and mouse ports. It is also used to connect analog devices such as audio devices and video devices.D-type connectors are usually made of metals such as steel, copper, and aluminum to provide durability and reliability. The grommets on the connector are usually gold or silver plated to improve conductivity and prevent oxidation. The size and shape of the D-type connector can be adjusted to meet different connection needs depending on the application.There are different types of D-type connectors for different applications. The most common types are D-sub 9, D-sub 15, and D-sub 25. Among them, D-sub 9 connectors are widely used for RS-232 serial communication interfaces, while D-sub 15 connectors are used for VGA image interfaces.D-sub 25 connectors are used in many applications, including parallel ports, printer ports, audio and video devices, etc. D-type connectors have many advantages. First, they are reliable connectors because they provide a solid connection and stable signal transmission. Second, D-type connectors are relatively small and can be easily installed in a computer system or other device. In addition, D-type connectors can be quickly connected and disconnected, which makes it easier to replace or repair equipment. Despite their many advantages, D-type connectors have some disadvantages. First, they have a limited number of connectors, usually only one center plug and two side grommets, so they cannot carry large amounts of data and signals. Second, the relatively high manufacturing cost of D connectors makes them unsuitable for some inexpensive electronic devices.D connectors have many advantages, such as: high reliability: the metal shell of the D connector provides excellent shielding and protection, which can protect the electronic components inside the connector from external interference and damage. In addition, the retention mechanism of the D-type connector ensures that the connector remains secure under vibration and shock. High Current Transfer Capability: D-type connectors can withstand high currents and voltages, making them suitable for applications requiring high current transfer. Multiple Formats: D-Type connectors are available in different formats, such as right-angle, flat, and shell threaded, to meet the needs of different applications. Easy to install and maintain: The simple structure of D-type connectors makes them easy to install and maintain. In addition, due to its removability, the components inside the connector can be easily replaced. Widely used: D-type connectors are widely used in many fields, such as communications, electronics, medical, military and aerospace. Due to their reliability and high current transfer capability, D-type connectors are particularly suitable for applications requiring a high degree of reliability and high performance.D-type connectors have an important role to play in many applications. For example, in aviation and aerospace, D-type connectors are commonly used to connect sensors, measurement equipment and spacecraft systems. In medical equipment, D-type connectors are used to connect a variety of medical devices and instruments, such as electrocardiographs, blood pressure monitors and glucose meters. In telecommunications and networking equipment, D-type connectors are used to connect computers, servers, and network equipment.D-type connectors are a widely used type of connector in computer systems and other electronic equipment. Their design and shape D-type connector is a type of electronic connector that has attracted much attention for its reliability and wide range of functions. It consists of two interlocking semicircular metal housings shaped like the letter "D", hence the name D-type connector. The connector was originally developed by Cannon in 1952 to connect computer equipment. Today, it is used in many applications, such as communications, electronics, medical, military and aerospace.

B. What are the domestic and foreign manufacturers of D connectors?

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