Connector connection and detection method

Connectors are one of the electronic devices that everyone is very familiar with. this article will introduce the relevant knowledge of connectors based on two points. The function of the connector is to build a bridge of communication between blocked or isolated circuits in the circuit, so that the current can flow and the circuit can achieve the predetermined function.

I. About connector connection methods

1. Threaded connection method

A connection method often used by connectors with larger contacts and those working in strong vibration environments. This connection method can be equipped with a fuse to prevent loosening after the connection is completed. This connection method is reliable to use, but the connection and disconnection speed is slow.

2. Bayonet connection method

It is a reliable and rapid connection and disconnection method. Most bayonet connection type connectors have a visual display of correct connection and locking, which can be observed from the small hole on the side of the connector connection nut.

3. Plug-in connection method

It is a multi-purpose connection method. When connecting and disconnecting, the moving direction of the connector plug and socket is usually reciprocating linear motion, without twisting and rotating, and only a small working space is required to complete the connection and disconnection. Common plug-in connections have two structures: ball bearings or pins. This connection form has no mechanical labor-saving mechanism. Once the connection is mis-inserted, the mechanical resistance will increase significantly and can be discovered in time.

4. Cabinet connection method

It is a connector used for some equipment that needs to be blindly connected close to the frame. It can make the electrical equipment lighter and smaller, easier to maintain and more reliable. Cabinet-type circular push-pull self-locking connectors usually use floating or elastic contact design structures to ensure their correct connection.

II. Connector quality inspection

First, we understand the following basic connector appearance standards. The connector consists of a terminal plastic shell and a pin seat. We divide it into pre-assembly and post-assembly inspections:

Pre-assembly inspection: lack of material, burrs, shrinkage, deformation, color difference, dirt, hole blocking, indentation, uneven baffle/deformation, card point upturned, sunken/biased or broken, PIN mark incorrect/no PIN mark

Post-assembly inspection: whether there is a gap between the copper shell/iron shell and the plastic shell, deformation of the iron shell/copper shell, the buckle is not pressed in place/pressed biased, the plastic shell is crushed, the left and right hooks are not installed in place (the exposed size of the hooks at both ends is inconsistent), press the hooks several times by hand to confirm whether the left and right hooks are normal and whether they are elastic

The above are all the factors that connector manufacturers exclude when testing products, and remove the defective products inside. These are all the inspection steps in the manufacturer's quality inspection.