Locking fastening device for two-part electrical connectors with axial coupling

A locking fastening device for two-part electrical connectors with axial coupling, the device comprising:

• two male mistake-proofing mechanisms;
• and
• two female mistake-proofing mechanisms in respective parts, the mistake-proofing mechanisms being positioned on both sides of contacts of the respective parts of the male and female electrical connector and respectively comprising at least a protuberance and a bore axially cooperative to produce the fastening of the parts during coupling,
• wherein the protuberance of the male mistake-proofing mechanism comprises at least one flexible element protruding from its surface and abutting with the female mistake-proofing mechanism, able to be axially inserted into the bore of said female mistake-proofing mechanism and being comprised of at least one axial blocking member by radial expansion of the flexible element in said bore,
• wherein the bore of the female mistake-proofing mechanism comprises an expansion space for the flexible element of the male mistake-proofing mechanism, provided with axial blocking means for the blocking member of the male mistake-proofing mechanism;
• and
• wherein a push-piece is associated with the female mistake-proofing mechanism, movable within the latter and guided between an inactive position without axial blocking and an active position with axial blocking of the two mistake-proofing mechanisms by insertion of the push-piece into the flexible element of the male mistake-proofing mechanism to push it back radially, guide means actuating locking means of the axial blocking.