Patent Publication Number: US-6698361-B2

Title: Foldable desk

Description:
FIELD OF THE INVENTION 
     The present invention relates to a foldable desk wherein the legs can be folded under the top and have rollers so that the folded status of the desk can be used as a slide bench. 
     BACKGROUND OF THE INVENTION 
     A conventional foldable desk generally includes a top and two legs which are respectively and pivotally connected to an underside of the top so that the two legs can be pivoted when the desk is not in use. The foldable legs make the space that the desk occupies is reduced. The foldable desk is usually used as a picnic desk and can be conveniently put in a car trunk. However, the legs cannot be folded to be flat so that it still occupies a certain amount of space. Besides, it is difficult to overlap two or more than two desk within a limited space. 
     SUMMARY OF THE INVENTION 
     In accordance with one aspect of the present invention, there is provided a foldable desk which comprises a top and two rollers are connected to an underside of the top. A first leg and a second leg are respectively and pivotally connected to an underside of the top. One of the first leg and the second leg has two rollers connected thereto. 
     The primary object of the present invention is to provide a foldable desk that has rollers when the desk is folded as a flat combination. 
     Another object of the present invention is to provide a foldable desk wherein the top has recesses for receiving rollers of another desk that is overlapped thereto. 
     The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a perspective view to show a foldable desk of the present invention; 
     FIG. 2 is a cross sectional view to show the foldable desk of the present invention; 
     FIG. 3 is a cross sectional view to show the foldable desk of the present invention wherein the two legs are folded and rollers contact the ground; 
     FIG. 4 shows one folded desk is bridged between two desks of the present invention; 
     FIG. 5 is a cross sectional view to show another embodiment of the foldable desk of the present invention; 
     FIG. 6 is a cross sectional view to show yet another embodiment of the foldable desk of the present invention, and 
     FIG. 7 shows the desk as shown in FIG. 6 is folded. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The first opening  13  is defined by two opposite surfaces and a U-shaped inside connected between the two opposite surfaces. Each of the two opposite surfaces includes a plurality of stepped surfaces  132  and the U-shaped inside includes a plurality of stepped areas  133  which are connected between the stepped surfaces  132 . The stepped surfaces  132  and the stepped areas  133  are complied with the sizes of the hex wrenches  30  to be engaged therewith. The sizes of the stepped surfaces  132  and the stepped areas  133  are located in sequences so that the larger stepped surfaces  132  and stepped areas  133  are located close to the end of the tubular body  10 . A plurality of holes  12  are defined in the end  11  of the body  10 . A passage  12 ′ is defined longitudinally through the tubular body  10 . 
     The first leg  20  has two rollers  3  connected thereto and the rollers  3  face the rollers  30  when the desk is expanded as shown in FIG.  2 . The top  1  has four two recesses  10 ,  11  defined in a top surface thereof. 
     As shown in FIG. 3, when the first leg  20  and the second leg  21  are pivoted to a position parallel to the top  1 , the pin  25  moves to the other end in the groove  210  and the rollers  3  and the rollers  30  contact the ground, and the folded combination of the foldable desk is in a flat status. 
     As shown in FIG. 4, one folded desk can be bridged between two expanded desks by engaging the rollers  30  in the recesses  10  and  11  of the other two expanded desks. 
     As shown in FIG. 5 which shows another embodiment of the foldable desk wherein the top  1  has no rollers and the first leg  20  and the second leg  21  each have rollers  3 . The two legs  20 ,  21  are pivotally outward and toward two ends of the top  1  as shown. The rollers  3  contact the ground so that the folded combination can be moved on the ground by the rollers  3 . 
     FIG. 6 shows that the two legs  20 ,  21  have no rollers thereon and two set of rollers  30  are connected to an underside of two ends of the top  1 . When the two legs  20 ,  21  are folded, the two rollers  30  contact the ground as shown in FIG.  7 . 
     While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.