Strain-relief device for a plug-in connection in communications and data systems

The invention relates to a strain relief device ( 1 ) for a plug connect for communications and data technology, comprising a base part ( 10 ) for holding at least part of the plug connector, and a cable ( 51 ) which can be connected to the plug connector, with the base part ( 10 ) being designed with first latching means, and closure means ( 30 ), with the closure means ( 30 ) being designed with second latching means which form a latching connection with the first latching means on the base part ( 10 ), wherein the closure means ( 30 ) are in the form of a spring comprising two limbs ( 31 ) which can be pushed along a guide ( 20 ) onto the base part ( 10 ), with the base part ( 10 ) being designed with at least one support point ( 21 ) for the closure means ( 30 ), and the closure means ( 30 ) being designed such that an opposing force, which is produced by the cable ( 51 ) moves the second latching means, which are arranged on the limbs ( 31 ), toward the first latching means on the base part ( 10 ).