Patent ID: 8764067

Claim:
A connection device, comprising: an insertion section having an annular outer groove, a housing configured to receive the insertion section; a blocking element configured to lock the insertion section in the housing, wherein the blocking element for locking the insertion section in the housing engages into the annular outer groove and into an annular inner groove formed in the housing, wherein the blocking element is configured to be withdrawn in a withdrawal direction through a housing opening substantially tangentially to the grooves, wherein the blocking element is configured to be pre-fitted in the inner groove and in a pre-fitted state, the insertion section is configured to be inserted into the housing with elastic deformation of the blocking element from the pre-fitted state, and wherein the blocking element in the pre-fitted state engages the outer groove and is fixed on the housing securing the blocking element against a displacement in a peripheral direction, and a securing device arranged on an exterior of the housing for securing of the blocking element against displacement at least in the withdrawal direction, wherein the securing device has an outer stop arranged on the exterior of the housing lying opposite an end of the blocking element, the end of the blocking element arranged on the exterior of the housing in the pre-fitted state.