Terminals poor contact solution introduced

First, poor contact

The metal conductor inside the terminal is the core part of the terminal that transmits the voltage, current or signal from an external wire or cable to the corresponding contact on the mating connector. Therefore, the contact must have excellent structure, stable and reliable contact retention and good electrical conductivity. Due to the unreasonable design of the contact structure, the wrong material selection, the instability of the mold, the oversize machining, the rough surface, the unfavorable surface treatment process such as heat treatment electroplating, improper assembly, poor storage and use environment and improper operation, Contact parts and mating parts cause poor contact.

Second, poor contact prevention methods

1, conduction test

General terminal manufacturers product acceptance test without this project, and users generally need to be conducted after the test installed. Therefore, it is recommended that manufacturers increase the detection of point-by-point continuity of 100% for some key models.

2, instantaneous detection

Some terminals are used in dynamic vibration environment. Experiments show that only static contact resistance test qualified, and can not guarantee the use of dynamic environment reliable contact. Because, often the contact resistance of qualified connectors in the vibration, shock and other simulated environmental tests still appear instantaneous power failure, so some high reliability requirements of the terminal, the best 100% of its dynamic vibration test to assess its Contact reliability.

3, single-hole separation force test

Single-hole separation force refers to the engagement state of the contact into a movement from the static separation force used to characterize the pin and the jack are in contact. Experiments show that: single hole separation force is too small, in the vibration, impact load may cause signal instantaneous break. The method of testing the single-hole separation force is more effective than the measurement of the contact resistance. Inspection found that single-hole separation force ultra-poor jack, the measurement of contact resistance is often still qualified. To this end, in addition to the production plant to develop a new generation of flexible mating contact with stable and reliable contacts, should not be used for key models using automatic insertion and removal force testing machine multi-point Qi, the finished product should be 100% Hole separation force check, to prevent signal relaxation caused by the relaxation of individual jacks.