A device for controlling locking (20, 20A, 20B, 20C) for an opening leaf mounted in a frame so as to be able to pivot at least around a longitudinal axis to move between a closed position and a "swinging" open position, the device comprising: a control rod able to be mounted sliding along the longitudinal direction on the leaf; at least one first locking assembly comprising a first bolt secured to the control rod and a first associated strike; at least one first controlled rod able to be mounted sliding along a lateral direction on the leaf and that is coupled in movement to the control rod such that a translation of the control rod along a longitudinal direction commands a translation of the first controlled rod along the lateral direction; at least one second locking assembly comprising a second bolt secured to the first controlled rod and an associated second strike; and at least one actuator able to be mounted maneuverable on the leaf so as to control the translation of the rod, in which device, from respective locking positions of the control rod and the first controlled rod in which the first and second bolts (41, 51) are respectively able to be engaged with the first and second strikes (42, 52) to keep the leaf in its closed position, a first maneuvering of the actuator causes translations of the control rod and the first controlled rod to disengage the first and second bolts (41, 51) from the first and second strikes (42, 52) in order to allow the swinging opening of the leaf, characterized in that the device comprises first return means able to be secured to the leaf to elicit the movement of the control rod and the first controlled rod toward their respective locking positions, and in that the bolt (41, 51) and the strike (42, 52) of at least one of the first and second locking assemblies (40, 50), called "cam-lock assembly", are able to cooperate by cam effect in order, upon closing of the leaf from its swinging open position, to cause unlocking translations of the control rod and the first controlled rod, without actuating the actuator. a control rod able to be mounted sliding along the longitudinal direction on the leaf; at least one first locking assembly comprising a first bolt secured to the control rod and a first associated strike; at least one first controlled rod able to be mounted sliding along a lateral direction on the leaf and that is coupled in movement to the control rod such that a translation of the control rod along a longitudinal direction commands a translation of the first controlled rod along the lateral direction; at least one second locking assembly comprising a second bolt secured to the first controlled rod and an associated second strike; and at least one actuator able to be mounted maneuverable on the leaf so as to control the translation of the rod, in which device, from respective locking positions of the control rod and the first controlled rod in which the first and second bolts (41, 51) are respectively able to be engaged with the first and second strikes (42, 52) to keep the leaf in its closed position, a first maneuvering of the actuator causes translations of the control rod and the first controlled rod to disengage the first and second bolts (41, 51) from the first and second strikes (42, 52) in order to allow the swinging opening of the leaf, characterized in that the device comprises first return means able to be secured to the leaf to elicit the movement of the control rod and the first controlled rod toward their respective locking positions, and in that the bolt (41, 51) and the strike (42, 52) of at least one of the first and second locking assemblies (40, 50), called "cam-lock assembly", are able to cooperate by cam effect in order, upon closing of the leaf from its swinging open position, to cause unlocking translations of the control rod and the first controlled rod, without actuating the actuator.