Integral picture frame with quick changeable flexible decoration part

An integral picture frame with a quick changeable flexible decoration part comprising:

• an annular inner border portion with an inner convex surface, an annular intermediary protrusion portion and an annular outer border portion with an outer convex portion, a plurality of spaced first ribs formed on an outer surface of said annular inner border portion being attached to a first edge of a first annular flat seat at a lower part of each first rib and thereby defining a first compartment among each two first ribs and said first flat seat, said first flat seat having a second edge opposite to said first edge of said first flat seat, a plurality of spaced second ribs formed on an inner surface of said annular outer border portion being attached to a first edge of a second annular flat seat at a lower part of each second rib and thereby defining a second compartment among each two second ribs and said second flat seat, said second flat seat having a second edge opposite to said first edge of said second flat seat, said annular intermediary protrusion portion having two opposite edge walls respectively protruding upwardly from said second edge of said first annular flat seat and said second edge of said second annular seat and then centrally curved to form a convex surface, a flexible decoration part being changeably engaged onto a front side of said picture frame by means of deformation of two edges of said decoration part such that the deformation portions of said two edges of said decoration part are respectively fitted into said first compartments and said second compartments;
• on a rear side of said picture frame, a first flat rear surface of said annular intermediary protrusion portion having a level higher than a second flat rear surface of said annular inner border portion and thereby defining a recess for receiving a glass plate and a picture.