a sofa that sitting mat protrude frontward and backed sofa converts into sitting mat

摘要

PURPOSE: A sofa is provided to fold the back of a seat to the right angle for transforming the back into a mat, and to unfold a sub back of the seat in between the mat and a backing plate in a slope form. CONSTITUTION: A sofa comprises the following: a speed reducing gear bed for reducing power from a motor; a lower frame(700b) including a female screw body combined with a male screw shaft, a roller, and a driver; a roller supporting stand(53) supporting the load of an upper frame; and the upper frame(700a) combined with the roller supporting stand, and a bracket with a pin bolt.