Patent ID: 6883779

Claim:
A receiving part of a plug-in coupling, comprising a socket housing having a plug-in opening for a plug part and having a retaining device for releasably fixing a plug part in a secured position, the retaining device having a retaining element which is mounted in the socket housing and has radially elastically deformable retaining sections for latching engagement behind a radial retaining step of the plug part in the secured position, and a release element that is secured in an axially displaceable manner relative to the socket housing via latching means, the release element engaging by means of an inner release section in the plug-in opening acting against the retaining sections of the retaining element, the retaining sections being selectively coupled with a securing element in such a manner that the release element is blocked in the secured position preventing a release movement and is unblocked in an unblocked position permitting a release movement.