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Four ways to connect a connector pin

A pin jack is a kind of positioning joint connecting an electronic circuit, which is composed of a plug-in and a connector, namely, we usually say pin and jack. In general, the pin and the jack can be completely separated. But the connection is stable when needed, so a pin jack can also be called a connector. A connector pin is a needle-like plug on a connector.

Pin jack is a kind of positioning joint connecting an electronic circuit, which is composed of plug-in and a connector, namely, we usually say pin and jack. In general, the pin and the jack can be completely separated. But the connection is stable when needed, so a pin jack can also be called a connector. A connector pin is a needle-like plug on a connector.

The stable connection of the socket is a basic requirement for the connector. However, there are various connection methods, among which the four most widely used ones are threaded connection, snap-fit connection, plug-and-pull connection, and cabinet connection. These names can give you a general understanding of the manifestations of these different connection methods in the structure of the connector.

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The stable connection of the pin jack is the basic requirement of the connector. However, there are a variety of connection methods, which are widely used, including four kinds: lifting connection, bayonet connection, plug and pull connection, and cabinet connection. The name gives you a sense of how the various connections are represented in the connector structure

2、Threaded Connection

The threaded connection is a threaded or explosive bolt structure. This kind of structural connection is more stable, but the loading and unloading efficiency is low.

It is composed of a plug housing with an external thread and a socket housing with an internal thread. Through the precise connection of the pins and sockets, this structure features a high connection strength. The threaded joint is equipped with an O-ring or a lock washer.

For some models, an O-ring or a lock washer is added at the threaded joint to enhance sealing.

This structure connection has extremely high strength, with a deep thread engagement and an axial tensile force of up to several hundred Newtons, capable of withstanding long-term intense vibrations. However, the loading and unloading efficiency is relatively low.

2、Bayonet connection

The bayonet connection can see the obvious concave and convex groove on the connector; this structure can be fast load and unload, preventing misinsertion. But the production accuracy is high.

It achieves quick insertion and removal through rotation or snap-locking, while possessing excellent shock resistance, anti-loosening and sealing properties. The core of the snap-fit connector lies in the mechanical locking structure (slot + pin) and the elastic contact design, balancing both quick insertion and high reliability.

The snap-fit connection method will show obvious grooves and protrusions on the connector. This structure is convenient for quick installation and disassembly, has balanced vibration resistance, and can prevent accidental insertion. However, its production accuracy requires high standards.

3、Plug and unplug the connection

Plug and pull the connection is very simple, is the vertical friction between the pin and the jack bite each other, the separation is also linear movement, do not need to rotate, plug and pull is convenient, widely used.

The shell is made of plastic or light metal. The plug end is equipped with an elastic hook (like the clip on a USB) or friction positioning protrusions, while the socket end has a slot or depression at the corresponding position. The pins and sockets are mostly in a tight fit.

This plug-and-unplug connection is very simple. Its principle is that there is a vertical friction force between the pin and the socket, and they lock together. When separated, it is a linear movement without rotation. The operation is convenient and widely used. However, its vibration resistance is poor. It relies on the elastic hook or tight fit for locking, and is prone to loosen in an environment with vibration.

4、Connect cabinets

This structure is rather complex and is mainly used for electrical connectors on devices that are close to the frame and require blind connections. After being fixed, it is combined with the overall sealing design of the cabinet to achieve a dust and water resistance level of IP54 or above. It can make electrical equipment lighter, smaller, easier to maintain and more reliable.

This connection method has extremely poor flexibility. Once fixed, it is difficult to move and is not suitable for portable devices or scenarios where positions need to be frequently adjusted. It is necessary to plan the opening size of the cabinet panel or the position of the guide rail in advance. Later modifications require re-opening holes or adjusting the guide rail, which incurs high time and labor costs.

The structure is complex, and it is mostly used for electrical connectors on devices that are close to the frame and need to be connected blindly. It can make the electrical equipment lighter, smaller, easier to maintain and more reliable.

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