During the use of the connector terminals, there may be many adverse factors such as peeling, corrosion, bruise on the coating surface, flash and fracture of the plastic shell, rough processing or deformation of the close contact parts of the contact parts, which lead to poor appearance.

1、 Poor insulation of connector terminals

The function of the connector terminal insulator is to keep the contacts in the correct position, and to insulate the contacts and the shell. Therefore, the insulating parts must have excellent electrical performance, mechanical performance and process molding performance. Especially with the wide use of high-density and miniaturized terminals, the effective wall thickness of insulator becomes thinner and thinner. This puts forward more stringent requirements for insulating materials, injection mold precision and molding process.

2、 Poor fixing of connector terminals

Connector terminals need to be fixed in a specific position to achieve stable connection. If the installation is not perfect or the product life cycle is insufficient, it will lead to poor fixation, light impact on reliable contact, resulting in instant power failure, and serious product disintegration. Disintegration refers to the abnormal separation between plug and socket, between pin and Jack caused by unreliable structure due to material, design, process and other reasons when the terminal is in the plug-in state, which will cause serious consequences of power transmission and signal control interruption of control system. Due to unreliable design, wrong material selection, improper molding process selection, poor quality of heat treatment, mold, assembly, welding and other processes, poor assembly will cause poor fixation.

3、 Poor contact of connector terminal

The metal conductor inside the connector terminal block is the core part of the terminal block, which transmits the power and signal to other parts in contact with it. Therefore, the metal conductor inside the terminal block must have good conductivity. If the design of the contact is unreasonable, the material selection is wrong, the size is not up to standard, or the plating treatment is improper, it will cause poor contact of the connector terminal.

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