Most of finished sofas can be operated within 4cm from the wall.
The balance of sofa can be automatically adjusted by sitter's gravity center, meanwhile sitting, relaxing and reclining postures can be well controlled.
By simple operation, it can be opened by the eject controller and returned with slight press of feet.
Three extra wider connection bars and one normal bar make the system more stronger and stabilizer;the flat ends of bars help to resist torsion.
KD inserts facilitate packing and installation.
Wooden frame landing is designed to make different seat height. Utilize the part of the pulley to move the whole sofa.