Coupling system for a container

A coupling device for a container comprising:

• a housing defining a chamber extending along a longitudinal axis, the housing having axially opposed front and rear ends, as well as a front opening at the front end;
• a hollow shaft having a cylindrical passage therein, reciprocally displaceable in the chamber along the axis, the shaft being selectively moveable between a rest position and an active position, wherein the shaft is moved axially forward to engage a cooperating mating receptacle;
• one or more detent elements provided in the shaft and displaceable therein between a retracted position and a retaining position, wherein the detent element(s) protrude through respective lateral opening(s) in the front portion of the shaft, whereby the detent element(s) come into locking engagement with the mating receptacle;
• a control pin reciprocally arranged inside the shaft and comprising a front section configured for interacting with the detent elements, wherein the control pin is selectively moveable between a rest position, corresponding to the retracted position of the detent elements, and an active position, wherein the control pin is moved forward inside the shaft in order to move the detent elements into their retaining position, whereby the front section of the control pin is configured to support the detent elements in both positions;
• and
• actuating means configured to selectively control movement of the shaft to move it from the rest position to the active position, and of the control pin, to move the detents elements from the retracted position to the retaining position.