A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
A47C—CHAIRS; SOFAS; BEDS
A47C17/00—Sofas; Couches; Beds
A47C17/04—Seating furniture, e.g. sofas, couches, settees, or the like, with movable parts changeable to beds; Chair beds
A47C17/22—Seating furniture having non-movable back-rest changeable to beds with means for uncovering a previously hidden mattress or similar bed part
A47C17/225—Seating furniture having non-movable back-rest changeable to beds with means for uncovering a previously hidden mattress or similar bed part with hidden separate full size mattress frame unfolded out of the base frame