Locking mechanism for securely preventing disconnection between a plug and a receptacle

摘要

In a plug connector (1) for being connected to a receptacle connector (2) in a first direction, a plug contact (13) is held by a plug housing (11) and has a principal surface extending along the first direction. The plug contact is formed with a concave portion recessed from the principal surface in a second direction perpendicular to the first direction. A wall is remained between the principal surface and the concave portion. In the receptacle connector (2), a receptacle housing (21) holds a receptacle contact (23) for coming in contact with the plug contact in the second direction. The receptacle contact is formed with a projection (23d) which is positioned inside the concave portion when the plug connector is connected to the receptacle connector.