Mechanical horological movement with power reserve detection

A mechanical horological movement provided with means for detecting the power reserve for a watch, the movement comprising at least one barrel system with at least a first drive wheel arrangement connected at the output of the central axis of the barrel system and a second drive wheel arrangement connected to a cage of the barrel system at the axis,

• the power reserve detection means comprising a control element disposed opposite the cage of the barrel system, and intended to rotate about an axis of rotation parallel to the central axis of the barrel system, or to move in a rectilinear direction, being driven by a complementary member at the output of a differential, and a lever comprising a contact element, which is disposed opposite a control portion of the control element or in a control portion of the control element, and to move the lever so that a blocking part of the lever contacts an element of a geartrain, whether it is directly or indirectly connected to a finishing geartrain or to an oscillator of the movement to directly stop the mechanical horological movement when the power reserve detection means indicates zero,
• wherein the control element comprises an aperture as the control portion, the aperture having a first end to define a complete charge of the barrel system and a second end to define a complete discharge of the barrel system for indicating the power reserve at zero, and the lever rotatably mounted about a lever axis parallel to the axis of rotation or parallel to the central axis of the barrel system, the lever comprising the contact element disposed in the aperture of the control element to contact the second end of the aperture when the power reserve detection means indicates zero.