An electromechanical lock includes a lever coupled with a locking mechanism configured to receive mechanical power from an user, and to output the mechanical power to mechanically disengage the locking mechanism provided that a support of the fulcrum is in an open position, and a return mechanism for the support of the fulcrum including a reset spring whose other end is configured to, during the reception of the mechanical power from the user, move past the support of the fulcrum with the mechanical power outputted by the lever, and, finally, force the support of the fulcrum with the mechanical energy outputted by the return spring through the lever back to a locked position.