Cantilever umbrella

Abstract

The present invention relates to a cantilever umbrella comprising a plurality of retaining plates, an upper hub, an lower hub, a plurality of support ribs and a plurality of strut spreaders, and the structure of the cantilever umbrella is that: the support ribs are hinged to the upper hub, the two ends of each strut spreaders are hinged to the lower hub and the support rib respectively, the cantilever umbrella further comprises a switch mechanism, a support arm, a first bearing rod and a second bearing rod, the two ends of the first bearing rod are hinged to the lower hub and the upper portion of the retaining plate respectively, one end of the second bearing rod is hinged to upper hub and the other end of the bearing rod is provided with a support block, the intermediate portion of the first bearing rod is hinged to the intermediate portion of the second bearing rod, the two ends of the support arm are hinged to the second bearing rod and the retaining plate respectively, the switch mechanism is fixedly mounted on the retaining plate, the support block is detachably mounted on the switch mechanism, preferably, the cantilever umbrella further comprises a rotatable retaining mechanism which is conducive to the rotation of the canopy. The cantilever umbrella of this invention is of simple structure, easy to manipulate, economical and functional and can be used in a tiny space, and thus the present invention is appropriate to be applied widely.

I claim: 
     
         1 . A cantilever umbrella comprising a plurality of retaining plates, an upper hub, a lower hub, a plurality of support ribs and a plurality of strut spreaders, each of the support ribs being hinged to the upper hub, each of the strut spreaders having one end hinged to the lower hub and the other end hinged to the strut spreader, characterized in that, further comprises a switch mechanism, a support arm, a first bearing rod and a second bearing rod; the first bearing rod has one end hinged to the lower hub and the other end hinged to the upper portion of the retaining plate; one end of the second bearing rod is hinged to the upper hub and the other end of the second bearing rod is provided with a support block; the intermediate portion of the first bearing rod is hinged to the intermediate portion of the second bearing rod; the support arm has one end hinged to the second bearing rod and the other end hinged to the retaining plate; the switch mechanism is fixedly mounted on the retaining plate; the support block is detachably mounted on the switch mechanism. 
     
     
         2 . The cantilever umbrella according to  claim 1 , characterized in that, further comprises a rotatable retaining mechanism; the retaining plate comprises a first retaining plate and a second retaining plate; the rotatable mechanism disposed in the space between the first retaining plate and the second retaining plate is fixedly mounted on the first retaining plate and the second retaining plate respectively; the support arm is hinged to the second retaining plate; the switch mechanism is fixedly mounted on the second retaining plate; the first bearing rod is hinged to the second retaining plate. 
     
     
         3 . The cantilever umbrella according to  claim 2 , characterized in that, the upper end of the first retaining plate is rotatably connected to the upper end of the second retaining plate. 
     
     
         4 . The cantilever umbrella according to  claim 2 , characterized in that, the rotatable retaining mechanism comprises a rotating handle, a retention screw, a first locking block and a second locking block, the first locking block engages with the second locking block; the retention screw equipped through the first locking block and the second block engages with the thread of the rotating handle; the first locking block is fixedly mounted on the second retaining plate; the second locking block is fixedly mounted on the first retaining plate; the support arm is hinged to the second retaining plate; the switch mechanism is fixedly mounted on the second retaining plate. 
     
     
         5 . The cantilever umbrella according to  claim 4 , characterized in that, further comprises a first L-shaped plate and a second L-shaped plate; the first L-shaped plate is fixedly mounted on the second retaining plate and the second L-shaped plate is fixedly mounted on the first retaining plate; the first locking block is fixedly mounted on the first L-shaped plate and the second locking block is fixedly mounted on the second L-shaped plate respectively. 
     
     
         6 . The cantilever umbrella according to  claim 5 , characterized in that, the retaining screw is a mushroom head square neck screw; the mushroom head square neck screw equipped through the first L-shaped plate, the first locking block, the second locking block and the second L-shaped plate engages with the thread of the rotating handle; the neck of the mushroom head square neck screw is locked in a hole provided by the first L-shaped plate. 
     
     
         7 . The cantilever umbrella according to  claim 1 , characterized in that, the switch mechanism comprises a housing, a toothed plate and a lever; the lower portion of the toothed plate is fixedly mounted in the housing; the lever is rotatably mounted inside the housing; the lower end of the lever abuts on the toothed plate; the housing provided with a sliding groove is fixedly mounted on the retaining plate; the support block is equipped through the sliding groove and is locked by the toothed plate. 
     
     
         8 . The cantilever umbrella according to  claim 7 , characterized in that, the switch mechanism further comprises a flexible assembly which is disposed in the space between the toothed plate and the housing and is connected to the toothed plate and the housing respectively. 
     
     
         9 . The cantilever umbrella according to  claim 1 , characterized in that, further comprises a switch handle which is disposed on the second bearing rod and is adjacent to the support block. 
     
     
         10 . The cantilever umbrella according to  claim 1 , characterized in that, the number of the support ribs is three and the number of the strut spreaders is three.