A brief talk on the shortcomings and safety of wire terminals

Wires are widely used in life, including many parts. wire terminal Is an important part of the wire. However, the wire terminal is not an independent part. There are many parts below, including insulating parts and conductive parts, which are very important for the wire terminal.

1、 Wire terminal What are the disadvantages of?

From the perspective of use, the wiring terminal should have the following functions: the contact part must be conductive and the contact is reliable. The place where the insulation part should not be connected must be insulated reliably. Terminal blocks have three common forms of fatal faults:

1. Poor contact.

terminal The internal metal conductor is an important device of the terminal. It transmits the voltage, current or signal of the external wire or cable to the contact parts corresponding to its matching connector. Therefore, the contact must have good structure, stable and reliable contact maintenance and good conductivity. Due to unreasonable contact structure design, wrong material selection, unstable mold, poor processing size, rough surface, unreasonable surface treatment processes such as heat treatment and electroplating, improper assembly, poor storage and use environment, improper operation and use, the contact parts and mating parts of the contact will cause poor contact.

2. Poor insulation.

The function of insulator is to keep the contact arranged in the correct position, so as to insulate the contact from the contact and the contact from the shell. Therefore, insulating parts must have excellent electrical properties, mechanical properties and process molding properties. Especially with the wide use of high-density and small wiring terminals, the effective wall thickness of insulators is getting thinner and thinner. This puts forward stricter requirements for insulating materials, injection mold accuracy and molding process. Due to excessive metal on the surface or inside of the insulator, surface dust, flux and other pollution and moisture, organic sediment and harmful gas adsorption film fuse with the surface water film to form ion conductive channel, moisture absorption, mildew, aging of insulating materials, etc., which will cause short circuit, leakage, breakdown, low insulation resistance and poor insulation.

3. Poor fixation.

The insulator not only acts as insulation, but also usually provides accurate neutralization protection for the protruding contacts. At the same time, it also has the functions of installation, positioning, locking and fixing on the equipment. Poor fixation, light impact, reliable contact, resulting in instantaneous power failure, and serious product disassembly. Disassembly refers to the serious consequences of unreliable structure of the wiring terminal in the inserted state due to materials, design, process and other reasons, resulting in abnormal separation of plug and socket, pin and Jack, and interruption of power transmission and signal control of the control system. Due to unreliable design, wrong material selection, improper selection of forming process, poor process quality of heat treatment, mold, assembly and welding, improper assembly, etc.

In addition, poor appearance caused by coating peeling, corrosion, bruise, plastic shell flash, fracture, rough processing and deformation of contact parts, poor exchange caused by out of tolerance of positioning and locking fit size, poor consistency of processing quality and excessive total separation force are common, but these faults can usually be found and eliminated in time during inspection and use.

2、 Wire terminal Is it safe and reliable?

Although the wire terminal There will be many faults in use, but generally speaking, the use of these faults will not pose a threat to the safety of users, only there is no serious leakage phenomenon. The use of wire terminals is generally safe, and consumers don't have to worry too much.

Once the wire terminal If there is a fault, it will stop working immediately, so understanding the fault type and judgment method will help us make judgment and repair in time when the fault occurs. According to the above small series, the common fatal faults of wiring terminals include poor contact, poor insulation and poor fixation, so it is particularly important when selecting and installing materials. Therefore, materials with better performance should be selected to reduce the failure rate in the later stage, and the corresponding fault identification and troubleshooting methods should be understood, so that the terminal can be used more smoothly.

Shenglan Technology Co., Ltd_ It focuses on the production of electronic connectors and research and development of precision components. Its products are widely used in consumer electronics, new energy vehicles, USB, 5g and other fields. Its industrial lines cover the Pearl River Delta, Southeast Asia and other regions. It has established long-term strategic cooperation relations with well-known enterprises such as Foxconn, Lixun precision, Huawei, Xiaomi, TCL, Hitachi Group, BYD and Great Wall Motors, with IATF 16949, ISO9001 ISO14001, QC080000 and other system certification and product safety certification, and provide professional connection and manufacturing solutions for the industry http://jctc.com.cn/