Patent ID: 8215977

Claim:
An electrical plug-and-socket connector including: a first connector element having an end section and a locking means having an unlocking ring, the end section including an external circumambient groove, the unlocking ring having peripheral pockets and being rotatably guided in the external circumambient groove of the end section; and a second connector element having an end section with axially extending inner grooves and a catch hook provided in each groove and fixed to the second connector element, each catch hook having a connection side and an inward-projecting catch projection on the connection side, wherein in a locked state of the plug-and-socket connector the catch projections of the second connector element penetrate elastically into the pockets of the unlocking ring and in an unlocked state of the plug-and-socket connector the catch projections of the second connector element are pressed outwards by the unlocking ring, and wherein the end section of the second connector element has at least one window-like cut-out through which the unlocking ring is accessible and is adjustable to provide the locked state.