Locking device for electric connectors and electric connectors equipped with the device

Locking device for an assembly of electric connectors including at least a first and a second conjugated connector that can be coupled together, the locking device including:

• at least one latch susceptible of being made rigidly integral with the first connector, the latch presenting a passage for a bolt, and in the bolt passage a first locking relief,
• at least one bolt susceptible to be made rigidly integral with the second connector, the bolt presenting a section that is adjusted to the bolt passage of the latch, for insertion of the bolt into the latch, parallel to an axis of the bolt,
• a tongue received in a casing of the bolt, the tongue extending parallel to the axis of the bolt, and being configured for being inserted into the latch conjointly with the bolt, the tongue being provided with a second locking relief and the tongue presenting sufficient flexibility for displacement of the second locking relief between a protruding position on one face of the bolt turned towards the first locking relief at the time of insertion of the bolt into the latch and a retracted position in the casing of the bolt, the second locking relief being configured for a passage along the first locking relief in the retracted position at the time of insertion of the bolt into the latch and to occupy the protruding position behind the first locking relief in a direction of insertion of the bolt into the latch when the bolt occupies a locking position in the latch.