Portable laptop desk mounted on chair armrests

Abstract

Disclosed is a portable laptop desk mounted on chair armrests, comprising a board body, board sliding mechanisms, armrest sleeves and adjusting knobs. In use, the armrest sleeves are disposed around chair armrests and are fixed to the chair armrests by tightening the adjusting knob. In actual production, the large-sized armrest sleeves are arranged to ensure that the armrest the size of the armrest sleeves is set to be large to ensure that the armrest sleeves can be disposed around armrests of any sizes, thus greatly improving practicability and adaptability; and the board body is provided with the first board and the second board which are connected together and allowed to be flipped, such that the size of the board body is reduced, the express transportation cost of the portable laptop desk is reduced, and the portable laptop desk can be easily stored by users.

What is claimed is: 
     
         1 . A portable laptop desk mounted on chair armrests, comprising a board body, wherein the board body comprises a working surface and a mounting surface, at least two board sliding mechanisms and at least two armrest sleeves are arranged on the mounting surface, each said board sliding mechanism is correspondingly and fixedly connected to one said armrest sleeve, threaded holes are formed in sides, away from the board sliding mechanisms, of the armrest sleeves, and adjusting knobs are connected into the threaded holes; and when the portable laptop desk is used, the armrest sleeves are disposed around chair armrests and are fixed to the chair armrests by tightening the adjusting knobs, and the board sliding mechanisms slide forward or backward linearly with respect to the armrest sleeves to drive the board body to move. 
     
     
         2 . The portable laptop desk mounted on chair armrests according to  claim 1 , wherein each said board sliding mechanism comprises a connector and a slider, the slider is fixedly arranged on the mounting surface, and the connector is arranged between the board body and the slider; and a strip-shaped hole is formed in the slider, and a connecting pillar inlaid in the strip-shaped hole arranged on a side, close to the board body, of the corresponding armrest sleeve, a mounting hole is formed in an end surface of the connecting pillar, a connecting groove is formed in the connector, a connecting hole is formed in a bottom of the connecting groove, and the connecting pillar is inlaid in the connecting groove by means of the strip-shaped hole. 
     
     
         3 . The portable laptop desk mounted on chair armrests according to  claim 2 , wherein sawtooth protrusions are arranged on inner walls of two opposite ends of the slider, and slots matched with the protrusions are formed in two sides of the connector. 
     
     
         4 . The portable laptop desk mounted on chair armrests according to  claim 1 , wherein the board body comprises a first board and a second board, and the first board and the second board are connected detachably. 
     
     
         5 . The portable laptop desk mounted on chair armrests according to  claim 1 , wherein a first recess is formed in the working surface of the board body, a support frame and a support plate are arranged in the first recess, one end of the support frame is arranged on the support plate and is allowed to be flipped, multiple adjusting grooves are formed in a bottom surface of the first recess, and the other end of the support frame is matched with the adjusting grooves; and rotating pillars are arranged on two sides of the support plate, and holes matched with the rotating pillars are formed in wall surfaces of the first recess. 
     
     
         6 . The portable laptop desk mounted on chair armrests according to  claim 5 , wherein a second recess is arranged on a side, away from the first recess, of the support plate, a support bar for abutting against a laptop is arranged in the second recess, and the support bar is connected to the support plate and is allowed to be flipped. 
     
     
         7 . The portable laptop desk mounted on chair armrests according to  claim 1 , wherein a cup holder is arranged on the mounting surface, and the cup holder is rotatably connected to the board body. 
     
     
         8 . The portable laptop desk mounted on chair armrests according to  claim 6 , wherein flip portions are arranged on edges, away from hinged ends, of the support plate and the support bar. 
     
     
         9 . The portable laptop desk mounted on chair armrests according to  claim 1 , wherein an arc-shaped receding portion is formed on an edge of the board body. 
     
     
         10 . The portable laptop desk mounted on chair armrests according to  claim 1 , wherein a third recess is formed in the board body, and a mouse mat is arranged in the third recess.