Patent ID: 6921275

Claim:
A plug-in device, in particular for a sensor, with a unit plug and with a socket part, said socket part having an opening into which the unit plug can be reversibly inserted, wherein the unit plug has at least one knob, wherein the at least one knob, when the unit plug is inserted into the socket part, is disposed in a cutout in the socket part and is held in the cutout by a spring part, wherein the knob ( 9 ) is disposed on an elastic spring part ( 43 ) of the unit plug ( 3 ), wherein the spring part ( 43 ) is a bar that is clamped in place at both ends, wherein the unit plug ( 3 ) has a groove ( 40 ) and wherein the groove ( 40 ) is formed onto the unit plug ( 3 ) by means of a ring ( 24 ), which encompasses the unit plug ( 3 ) and is connected to the unit plug ( 3 ) by means of two connecting points ( 27 , 28 ).