Patent ID: 6663263
Filing Date: 2003-12-16
Classification: F21V

Abstract:
A lampshade, comprising:an upper ring; a lower ring; a plurality of upper ribs each having a first end pivoted to said upper ring, and a second end part opposite to said first end part; a plurality of lower ribs each having a third end pivoted to said lower ring and a fourth end part opposite to said third end, said fourth end part having a connection part pivoted to said second end part, said connection part having a substantially U-shaped cross-section and including a pair of flaps and a bight portion interconnecting said flaps, said flaps and said bight portion projecting from said fourth end part along lines parallel to the direction of extension of said lower rib and surrounding said second end part, and a pivot pin extending through said flaps and said second end part; and releasable interengagement elements formed on said flaps and said second end part to engage said second end part with said flaps and to lock said second end part from movement relative to said flaps, said interengagement elements including at least one protrusion and at least one recess for engaging said protrusion when said upper and lower ribs are in an unfolded position, wherein said connection part further includes an open side formed between said flaps opposite to said bight portion, said open sides of said connection parts of all of said lower ribs facing in outward directions towards the outside of the lampshade, said bight portion extending inwardly of said open side and abutting against a corresponding one of said upper ribs when said upper and lower ribs are in the unfolded position.