Patent ID: 7871218

Claim:
A coupling mechanism comprising: a coupler plug having at least one catch recess, a coupler socket for receiving the coupler plug, at least one spring-loaded catch connection comprising at least one horizontally spring-loaded catch hook positioned on the coupler socket corresponding to the at least one catch recess for connecting said coupler socket and said coupler plug to one another, and a safety mechanism comprising a spring-loaded catch element positioned in the coupler socket and consisting of an axially slidable pin and a radially slidable clamping element that is in active connection with the pin, wherein the clamping element is pre-tensed by a spring element in a direction that prevents actuation of the catch connection, wherein the insertion of the coupler plug into the socket and against the pin actuates said safety mechanism, causing the clamping element to be pressed radially inwardly, thus allowing the coupler plug to be pressed further into the socket to actuate the catch connection.