Plug-in connector

A plug-in connector comprising:

• a plug-in connector housing with at least one passage opening having a housing channel;
• at least one pushbutton having a pushbutton pin which is arranged at least partially in the at least one passage opening and has at least two circumferential grooves, namely a locking groove and a release groove;
• an annular, asymmetric coil spring which is arranged in each passage opening with its outer region in the housing channel and which is configured to assume at least two different orientations relative to the passage opening and to the pushbutton pin, namely a locking orientation and a release orientation,
• wherein in its locking orientation, the asymmetric coil spring allows the pushbutton pin to move into the plug-in connector housing and prevents the pushbutton pin from moving out of the plug-in connector housing, and
• wherein in its release orientation, the asymmetric coil spring allows the pushbutton pin to move out of the plug-in connector housing and prevents the pushbutton pin from moving into the plug-in connector housing, and
• wherein the asymmetric coil spring is configured to be tilted from its locking orientation into its release orientation when it is arranged with its inner region in the release groove,
• wherein
• the pushbutton pin also has a third circumferential groove, namely a holding groove,
• wherein the asymmetric coil spring is configured to be tilted from its release orientation into its locking orientation when it is arranged with its inner region in the holding groove, and
• wherein the plug-in connector furthermore has at least one additional spring element configured for automatically moving the pushbutton out of the plug-in connector housing, wherein the additional spring element is a conical spring.