Abstract: Improved locking sleeve assembly is intended for use on a knock-down display shelf which is made up of four supporting pillars, multiple inner sleeves, rest boards, a top board and a plurality of retaining caps. Each locking sleeve assembly is made up of a separable inner locking sleeve and a retaining cap which has a roundly flanged bottom and a hollow central tubular portion provided with a tapered inner surface. On the circular flange of each retaining cap are disposed a number of counter sunk screw holes. At each corner of a rest board is disposed a counter sunk through hole in which a bottom flanged retaining cap can be placed and fixed in place by screws engaged with the screw holes on the circular flange. Each supporting pillar has a plurality of equally spaced peripheral grooves so as to permit halves of the separable locking sleeves, each having a peripherally extended rib on the inner surface, to be selectively engaged with the grooves of a supporting pillar at various levels.

Abstract: A table with adjustable shelves including four supporting rods, several collars, several retaining boards, a cover board, several supporting beams and several bridge beams. Each corner of the retaining board is formed with an arch recess. The supporting beam includes a linkage each end of which is connected with a C-shaped conic fixing sleeve. Two sides of top edge of the linkage are respectively formed with two dented section. When assembled, from lateral upper sides of the collars, the C-shaped conic fixing sleeves of the supporting beams are downward fitted onto the supporting rods and engaged with the collars fitted around the supporting rods. The bridge beams are bridged between the linkages of the supporting beams with the ends of the bridge beams inserted in the dented sections thereof. The retaining board is positioned between the supporting rods and rested on the supporting beams and the bridge beams.