Connector assembly having inertia locking mechanism

A connector assembly having a lock mechanism using an inertia force, the connector assembly comprising:

• a first connector and a second connector which are mated with each other,
• wherein the first connector has a first lock portion and a first inertia locked portion, and the second connector has a second lock portion and a second inertia locked portion, the first lock portion engaged with second lock portion, the first inertia locked portion engaged with the second inertia locked portion, the first lock portion having a first locking piece and a push piece that moves the first locking piece, the first inertia locked portion having a lock arm provided with a second locking piece, the lock arm being deflectable independently from the first lock portion, the second lock portion having a third locking piece that engages with the first locking piece after abutment thereof or when the push piece is depressed, the second inertia locked portion having a fourth locking piece abutted against the second locking piece.