Electromechanical actuator for blackout or sun-shading device and blackout or sun-shading installation comprising such an actuator

An occultation or solar protection installation comprising at least one occultation or solar protection device including:

• a screen,
• a top bar,
• a bottom bar,
• a top winding shaft,
• a bottom winding shaft, and
• an electromechanical actuator,
• the screen being disposed between the top and bottom bars,
• the top bar being connected to the top winding shaft via first cords, and the bottom bar being connected to the bottom winding shaft via second cords,
• the electromechanical actuator comprising:
• a single electric motor configured to drive the top and bottom winding shafts of the occultation or solar protection device, the top winding shaft being coaxial with the bottom winding shaft;
• a first transmission device connected to the single electric motor and connected to the top winding shaft of the occultation or solar device when the protection electromechanical actuator engages the occultation or solar protection device, the first transmission device comprising a first clutch;
• and
• a second transmission device connected to the single electric motor and connected to the bottom winding shaft of the occultation or solar protection device when the electromechanical actuator engages the occultation or solar protection device, the second transmission device comprising a second clutch;
• wherein, when the single electric motor is electrically activated and only one of the first and second clutches is engaged, only one of the first and second transmission devices is respectively activated to cause only one of the top and bottom winding shafts to be rotated by the single electric motor, and
• wherein, when the single electric motor is electrically activated and the first and second clutches are engaged, the first and second transmission devices are respectively activated to cause the top and bottom winding shafts to be rotated by the single electric motor.