Patent ID: 6027090
Filing Date: 2000-02-22
Classification: A47B,Y10S

Abstract:
A supporting assembly comprising:a base plate adapted to be secured to an object,a carrier slidably mounted to the base plate;a mounting seat secured to the carrier to slide therewith yet rotatable relative to the carrier, the mounting seat including a first axle and a second axle securely mounted thereon,a spring mounted around the first axle and including a first end attached to the mounting seat and a second end,a connecting plate including a first end pivotally connected to the mounting seat and a second end, a third axle being mounted to the second end of the connecting plate, the second end of the spring being attached to the connecting plate,a linking plate having a first end pivotally connected to the second axle and a second end,at least one lining piece having a first end pivotally connected to the first axle and a second end,a supporting seat including a top plate adapted to support an article thereon, the top plate including two parallel wings extended downwardly from an underside thereof each said wing including a first hole through which the third axle is extended and an arcuate slot located below said first hole,a positioning device including:a rod extended through the arcuate slots of the wings, the rod including a first enlarged end having a second hole defined therein and a second threaded end, the rod being extended through the second end of the linking plate and the second end of said at least one linking piece,a lever arm including an operative first end for manual operation and a second end having an eccentric stub formed thereon, the eccentric stub having a threading provided on a distal end thereof, the second end of the lever arm being extended through the second hole of the rod, and a nut being engaged with the threading, anda locking cap including a protrusion formed on an outer periphery thereof and received in the arcuate slot of the associated wing, the locking cap further including a receptacle defined therein for receiving the enlarged end of the rod, the locking cap further including a transverse hole through which the eccentric stub of the lever arm is extended,whereby when the lever arm is in a first position, the rod is retained in the arcuate slots and the top plate is retained in a level and an inclination angle relative to the mounting seat, and when the lever arm is in a second position, the rod is slidable along the arcuate slots and thus allows adjustment of the level and inclination angle of the top plate.