Patent ID: 8526109

Claim:
A portable projection screen device comprising: a carrying frame having a chamber and an opening which are communicated with each other; an elastically-rotating reel coupled between two ends of the carrying frame in an elastically rotatable manner and located in the chamber of the carrying frame; a movable frame; a projection screen arranged between the movable frame and the carrying frame via the opening, the upper side of the projection screen being connected to the movable frame and the lower side of the projection screen being connected to the elastically-rotating reel; at least two linkages arranged between the movable frame and the carrying frame, wherein two ends of each linkage are pivoted to the movable frame and the carrying frame to form a first pivoting part and a second pivoting part respectively; at least a third pivoting part arranged between the two ends of each linkage; and an antislip structure provided with each of the first, second and third pivoting parts of each linkage, wherein the antislip structure imparts continuously vertical adjustability to the projection screen.