Desk with tilt-adjustable tops

Abstract

A desk with tilt-adjustable tops includes a stand frame; a front top mounted to an upper front portion of the stand frame via a front tilt control device; and a rear top mounted to an upper rear portion of the stand frame via a rear tilt control device. The stand frame is height-adjustable and has a storage box located below a rear portion of the front top. The front and the rear top may be separately adjusted to different tilt angles best for writing, drawing, or reading at the desk. In normal time, the front and the rear top may be simultaneously restored to a horizontal state or adjusted to the same plane with the storage box invisibly located below the front top, so that the desk is used as a general desk with a flat top.

1 . A desk with tilt-adjustable tops, comprising: 
 a stand frame;    a front top mounted to an upper front portion of said stand frame via a front tilt control device; and    a rear top mounted to an upper rear portion of said stand frame via a rear tilt control device.    
   
   
       2 . The desk with tilt-adjustable tops as claimed in  claim 1 , wherein said stand frame includes: 
 a pair of side columns;    a pair of side members separately mounted to upper ends of said pair of side columns;    a pair of legs separately connected to lower ends of said pair of side columns;    an upper stretcher mounted between two substantially middle points of said pair of side members;    a lower stretcher mounted between two substantially middle points of said pair of legs; and    a central column mounted between two substantially middle points of said upper and said lower stretcher.    
   
   
       3 . The desk with tilt-adjustable tops as claimed in  claim 2 , wherein said front top includes a supporting frame located below said front top, said supporting frame being mounted at two lateral sides to inner front ends of said pair of side members, and pivotally connected at a front end to a bottom front portion of said front top via first hinges; and wherein said front tilt control device is located between said supporting frame and a position near a bottom rear portion of said front top.  
   
   
       4 . The desk with tilt-adjustable tops as claimed in  claim 1 , wherein said front tilt control device enables stepped adjustment of a tilt angle of said front top.  
   
   
       5 . The desk with tilt-adjustable tops as claimed in  claim 4 , wherein said front tilt control device enabling stepped adjustment of a tilt angle of said front top is a positioning plate with a row of locating holes.  
   
   
       6 . The desk with tilt-adjustable tops as claimed in  claim 1 , wherein said front tilt control device enables stepless adjustment of a tilt angle of said front top.  
   
   
       7 . The desk with tilt-adjustable tops as claimed in  claim 6 , wherein said front tilt control device enabling stepless adjustment of a tilt angle of said front top is an air cylinder.  
   
   
       8 . The desk with tilt-adjustable tops as claimed in  claim 1 , wherein said front tilt control device enables adjustment of a tilt angle of said front top within a range from zero to twenty-five degrees.  
   
   
       9 . The desk with tilt-adjustable tops as claimed in  claim 3 , wherein said pair of side members of said stand frame are provided at an inner side with a slide way each, and said supporting frame of said front top being slidably mounted in said slide ways via slide rails to move forward or rearward relative to said pair of side members.  
   
   
       10 . The desk with tilt-adjustable tops as claimed in  claim 9 , wherein said supporting frame is allowed to move forward or rearward relative to said side members within a range from zero to twenty centimeters.  
   
   
       11 . The desk with tilt-adjustable tops as claimed in  claim 2 , wherein said rear top is pivotally connected at two lower front ends to two near middle points of said two pair of side members via second hinges, and said rear tilt control device being located between two rear ends of said pair of side members and a position close to a bottom front of said rear top.  
   
   
       12 . The desk with tilt-adjustable tops as claimed in  claim 1 , wherein said rear tilt control device enables stepped adjustment of a tilt angle of said rear top.  
   
   
       13 . The desk with tilt-adjustable tops as claimed in  claim 12 , wherein said rear tilt control device enabling stepped adjustment of a tilt angle of said rear top is a positioning plate with a row of locating holes.  
   
   
       14 . The desk with tilt-adjustable tops as claimed in  claim 1 , wherein said rear tilt control device enables stepless adjustment of a tilt angle of said rear top.  
   
   
       15 . The desk with tilt-adjustable tops as claimed in  claim 14 , wherein said rear tilt control device enabling stepless adjustment of a tilt angle of said rear top is an air cylinder.  
   
   
       16 . The desk with tilt-adjustable tops as claimed in  claim 1 , wherein said rear tilt control device enables adjustment of a tilt angle of said rear top within a range from zero to 90 degrees.  
   
   
       17 . The desk with tilt-adjustable tops as claimed in  claim 1 , wherein said rear top is made of a metal material.  
   
   
       18 . The desk with tilt-adjustable tops as claimed in  claim 1 , wherein said rear top has metal elements embedded therein.  
   
   
       19 . The desk with tilt-adjustable tops as claimed in  claim 2 , further comprising a storage box mounted between said pair of side members to locate below a rear portion of said front top.  
   
   
       20 . The desk with tilt-adjustable tops as claimed in  claim 2 , wherein said central column and said pair of side columns are of height-adjustable structures.  
   
   
       21 . The desk with tilt-adjustable tops as claimed in  claim 20 , wherein said central column is an air cylinder, and wherein each of said pair of side columns includes a lower section and an upper section telescopically mounted in said lower section.  
   
   
       22 . The desk with tilt-adjustable tops as claimed in  claim 21 , wherein said upper section of each said side column is provided with a row of locating holes, and is located at a desired height relative to said lower section by fixing a locating screw into a selected one of said locating holes via said lower section.  
   
   
       23 . The desk with tilt-adjustable tops as claimed in  claim 2 , further comprising a computer case carriage mounted on one end of said lower stretcher.  
   
   
       24 . The desk with tilt-adjustable tops as claimed in  claim 2 , further comprising a compact disk rack hung below at least one of said two side members.  
   
   
       25 . The desk with tilt-adjustable tops as claimed in  claim 3 , further comprising a keyboard slide slidably mounted below said supporting frame of said front top.  
   
   
       26 . The desk with tilt-adjustable tops as claimed in  claim 1 , wherein said front top is provided with an anti-slip surface.