Patent ID: 7537472

Claim:
An electric plug connector, in particular for explosion-proof areas, comprising: a plug, a socket including at least a housing and a socket insert supported in said housing such that the socket insert is rotatable between first and second positions, said socket insert being rotated between its positions by means of the plug inserted in the socket, and a locking element supported in the socket insert such that the locking element is displaceable between a locking position and a release position, said locking element being provided with at least one coding projection which, in the condition in which the plug is inserted in the socket insert, is arranged in a complementary coding aperture in the plug thus arranging the locking element at its release position, wherein the socket insert is rotatable between the first and second positions when the locking element is in the release position; wherein the locking element is implemented as a locking pin which is supported in the socket insert such that it is longitudinally displaceable between the locking and release positions essentially in the plug-in direction of the plug.