What Causes The Cold-pressed Needle Wire To Accidentally Come Loose Under Vibration?

During on-site assembly and product debugging, it is not uncommon for the wires at the crimp contact connection point to be pulled out under vibration conditions. This is not purely accidental, but related to the contact components, wire matching, and mechanical load conditions.

crimp contact pin essentially combines the wire and connector through mechanical crimping, where the crimp layer and wire metal undergo plastic deformation to form a fixed connection. The crimping depth, shape, and wire size matching of contact socket crimp directly affect the stability of the crimp. Insufficient crimping or a crimp deformation shape that does not meet design requirements may cause microscopic movement of the connector under mechanical vibration, ultimately allowing the wire to slide out of the crimping cylinder.

Vibration-induced wire pull-out may also be related to the intensity of the mechanical environment of the application scenario. In high-vibration environments, such as near vehicle chassis electrical boxes where terminals are easily loosened, it indicates that a lack of proper retaining structure can lead to insufficient retaining force between the terminal and connector, causing the connector to gradually shift or even completely detach during vibration.