Control assembly for cordless curtain asembly

A cordless curtain assembly comprising:

• a head box and a bottom bar, a curtain body connected between the head box and the bottom bar, the head box having a space defined therein and two holes defined through a bottom board of the head box;
• a controller located in the space and fixedly connected to a first end of the head box, the controller having a pulley and a resilient rope going over the pulley, the resilient rope having a first end and a second end;
• a fixed unit located in the space and securely connected to a second end of the head box, the fixed unit having a first passage defined therethrough and two first guide members located in the first passage of the fixed unit, a first rod and multiple columns located in the first passage, the second end of the resilient rope fixed to the first rod;
• a movable unit movably located in the space and between the controller and the fixed unit, the movable unit having a second passage defined therethrough, two second guide members and a second rod located in the second passage, multiple rollers connected to two sides of the movable unit, the rollers rolling along two opposite insides of the space of the head box, the first end of the resilient rope fixed to the second rod, and
• a driving rope having a first end and a second end, the first end of the driving rope fixed to the bottom bar, the second end of the driving rope extending through the curtain body and wrapped to the two first guide members in the fixed unit and the two second guide members of the movable unit, the second end of the driving rope extending through the head box, the curtain body and being fixed to the bottom bar.