Patent Publication Number: US-7594475-B1

Title: Adjustable desk

Description:
BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   The present invention relates to a desk design, in particular to an adjustable desk. 
   2. Description of the Related Art 
   Typically, the conventional desk commonly consists of a desk board and a plurality of side legs secured to the desk board; however, those fixed legs render the desk board unable to be adjusted at the desire height and slope levels and incurs some problems. For instance, the desk may not be suitable for all pupils or adults due to the restriction on the settled height or slope of the legs, which hence results of the using inconvenience or even affects users&#39; postures. 
   In this manner, desks with adjustable design are produced to improve the deficiencies of the conventional desk. Most of them mainly consist of the barometrical sticks or the telescopic stems secured to the desk board so as to adjust the desk board at a certain height via driving those stem structures. Nevertheless, the conventional adjustable desks merely control the height of the desk board but still need other auxiliary devices for the purpose of slope adjustments of the desk board. That is, the conventional adjustable desk requires complex configurations and operations for raising and simultaneously tilting the desk board, hence still casing the inconvenience. 
   SUMMARY OF THE INVENTION 
   The object of the present invention is to provide an adjustable desk conducive to positioning the desk board at the desired height and slope levels in response to users&#39; demands, thereby obtaining a facile and quick adjustment and increasing the using convenience. 
   The adjustable desk in accordance with the present invention essentially comprises a desk board and a pair of supporting legs; wherein, each supporting leg provides with an upper frame fastened to the board, a lower frame pivoted to the upper frame, and a plurality of fasteners connecting the two frames. The upper and lower frames especially have separative slots defined thereon for generating dual intersections while the two frames are intersected, thereby permitting the fasteners to slide along the slots and further position the frames. Consequently, users handily adjust the desk board at the desired height and slope levels via tightening and loosening the fasteners so as to increase the convenience of using. 
   The advantages of the present invention over the known prior arts will become more apparent to those of ordinary skilled in the art by reading the following descriptions with the relating drawings. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is an exploded view showing a first preferred embodiment of the present invention; 
       FIG. 2  is a perspective view showing the integral appearance of the first preferred embodiment; 
       FIG. 3  is a schematic view showing the first preferred embodiment in operation; 
       FIG. 4  is another schematic view showing the first preferred embodiment in operation; 
       FIG. 5  is a perspective view showing a second preferred embodiment of the present invention; 
       FIG. 6  is a plan view showing the second preferred embodiment; 
       FIG. 7  is a schematic view showing the second preferred embodiment in operation; and 
       FIG. 8  is another schematic view showing the second preferred embodiment in operation. 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
   Before describing in greater detail, it should note that the like elements are denoted by the similar reference numerals throughout the disclosure. 
   Referring to  FIG. 1 , an adjustable desk  2  of the first preferred embodiment comprises a desk board  21  and a pair of supporting legs  22  separately extending from both sides of the desk board  21 , and each of the supporting legs  22  provides with an upper frame  23  fastened to the desk board  21 , a lower frame  24  pivotally mounted on the upper frame  23 , and a plurality of fasteners  25 , 25 ′ connecting both the upper frame  23  and the lower frame  24 ; wherein, the upper frame  23  and the lower frame  24  respectively has a first slot  231  and a second slot  241  defined thereon, and the two slots  231 , 241  intersect with each other to generate dual intersections while the two frames  23 , 24  are overlapped. Additionally, the fasteners  25 , 25 ′, adopted by the cooperation of the screws and nuts, are disposed between the two intersections for sliding along the two slots  231 , 241 , thereby adjusting a height level and a slope level of the desk board  21  via tightening and loosening the fasteners  25 , 25 ′. 
   Further, the upper frame  23  and the lower frame  24  also have respective positioning zones  26  defined along the circumferences thereof, and each of the positioning zones  26  provides with a plurality of positioning apertures  261  for allowing positioning stems  262  to pass through. Still further, a plurality of side holes  28  are equidistantly spaced on the upper frame  23  and the lower frame  24 , so that a side board  281  is positioned between the supporting legs  22  via fixing a fastening unit  282  into each side hole  28 . In addition, the upper frame  23 , the lower frame  24  or both of them can have a side panel  3  fixed thereto. It is adopted in the preferred embodiments that the lower frame  24  has the side panel  3  disposed thereon to achieve the beauty and the sustaining purpose. The side panel  3  further provides a plurality of openings  31  defined thereon, where users can freely hang personal articles, thus more increasing the convenience. 
   Referring to  FIG. 2 , with respect to the sales, the industry would predetermine the desk  2  at the certain height. While mounting, separately align the positioning apertures  261  on the two positioning zones  26  of the upper frame  23  with the apertures  261  of the two zones  26  of the lower frame  24  by inserting the positioning stems  262  through those intersecting apertures  261 , so as to maintain the upper frame  23  at a certain height level and also cause the communication of the first and the second slots  231 , 241 . In this manner, by means of the fasteners  25 ,  25 ′ to be screwed between the intersections of the slots  231 , 241 , the upper frame  23  hence is firmly fastened to the lower frame  24 . By following the same procedures, the height of the other upper frame  23  balances the height of the previous upper frame  23 , thus keeping the desk board  21  in a parallel state and accomplishing the height adjustment of the adjustable desk  2 . 
   Continuing with the aforementioned, users can alternatively have the adjustment by themselves. For the purpose of the height adjustment, users can either loosen the fasteners  25 , 25 ′ of the supporting leg  22  for directly raising and descending the upper frame  23  and the desk board  21  (as arrowed in  FIG. 3 ) or indirectly drive the upper frame  23 , that is, users loosen only one fastener  25  of the supporting leg  22 , pivot on the other non-loosened fastener  25 ′ for permitting one side of the upper frame  23  to perform in upward and downward movements by the loosened fastener  25  slidably moving in the slots  231 , 241  (as arrowed in  FIG. 4 ), and then tighten the fastener  25  between the two intersections to position the upper frame  23  with the lower frame  24  at the desired height. Contrarily, the primary loosened fastener  25  is then served as a pivot for adjusting the other side of the upper frame  23  at the same height level. Subsequently, the other supporting leg  22  follows the same procedures, whereby the desk board  21  can keep in balance and match users demands. For the purpose of the slope adjustment, users simply control the upper frame  23  to become swinging and decline toward one side while the upper frame  23  is in the upward and downward movements and fasten the fasteners  25 ,  25 ′ into the slots  231 ,  241 , thereby maintaining the desk board  21  at the desired slope. 
   Referring to  FIG. 5 , another preferred embodiment of the present invention mainly comprises the concatenation of elements and the operations as the same as the previous preferred embodiment. Particularly, each supporting leg  22  additionally dispose an adjustable apparatus  29  which provides with an adjustable stem  291  secured to the upper frame  23  and an adjustable member  292  pivoted on the lower frame  24  for driving and positioning the upper frame  23  (precisely shown in  FIG. 6 ). In addition, a plurality of inserting holes  242 , for instance of two holes in  FIG. 5 , are formed on the lower frame  24  to allow inserting bars  4  to be embedded therein, whose ends further fasten to a side plate  5 , thereby extending the working or studying space. 
   Further referring to  FIGS. 7 and 8 , the height and slope adjustments are still as the same as the previous embodiment. Particularly, users need to loosen the fasteners  25 ,  25 ′ and the adjustable member  292  and then grasp the adjustable stem  291  to straight control the movement of the upper frame  23  and serve the height and slope adjustments of the desk board  21 , therefore more increasing the using convenience. 
   To sum up, the present invention takes advantages of the supporting legs each with an upper frame, a lower frame and fasteners for positioning the frames. The above frames also have respective slots so that users can simply raise and tilt the desk board at the desired height and slope ranges by tightening or loosening fasteners through the slots; Further, the supporting leg can has an adjustable apparatus for an easy grasp, thus more increasing the using convenience. 
   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.