Patent ID: 7544074

Claim:
An electrical plug connector assembly comprising: a first connector; a second connector having a guide bolt projecting therefrom; a third connector; a fourth connector; a housing having a substantially square plate from which there extend backwards a first pin collar for the first connector and a second pin collar for the third connector; a guide housing between the first and second pin collar, the guide housing has an insertion opening for receiving a portion of the fourth connector; and a locking element mounted in the guide housing so as to be displaceable substantially perpendicularly to the direction of insertion of the first and the second connector, the locking element preventing the third connector from connecting to the fourth connector, the locking element being displaceably mounted in the housing to at least partially block the insertion opening, when in a starting position, thus preventing insertion of the fourth connector, the locking element having a guide surface, for receiving the guide bolt such that on connection of the second connector to the first connector the guide bolt acts on the guide surface to urge the locking element into a release position, wherein the locking element clears the insertion opening for receiving the fourth connector allowing its connection to the third connector.