Retractable cabinet device

Abstract

A retractable cabinet device has a base, two tracks and a cabinet. The tracks are mounted on the base and each track has a rail slot defined in the track and having a convex top surface. The cabinet is mounted movably on the tracks, selectively extends out or retracts back above the base and has two front wheel assemblies and two rear wheel assemblies. The front wheel assemblies contact the ground. The rear wheel assemblies are rotatably and slidably mounted respectively in the rail slots of the tracks. The retractable cabinet device is arranged in a compact and retracted configuration when idle to occupy less space and therefore facilitates use of indoors space where the retractable cabinet device is placed. Furthermore, the retractable cabinet device is stable and may be positioned in the using extracted or retracted configuration.

1 . A retractable cabinet device comprising:
 a base having a front end, a rear end, a top, two sides and two mounting slots defined in the top of the base;   two tracks attached respectively in the mounting slots, being parallel to each other and each track having a top surface, a bottom surface and a rail slot defined in the top surface and having
 a front end; 
 a rear end; 
 a convex top surface being open instead of being enclosed, and the convex top surface being curved so that an intermediate section of the convex top surface is higher than two end sections of the convex top surface; and 
   a cabinet being hollow, mounted movably on the tracks, selectively extending out from or retracting back above the base, having a front, a rear, a bottom and two sides and further having
 an internal space defined in one side of the cabinet and having at least one side opening; 
 a pair of front wheel assemblies mounted on the bottom of the cabinet close to the front and located out of the base for slidably and rotatably contacting a ground, and each front wheel assembly having a bracket and a front wheel rotatably mounted on the bracket; and 
 a pair of rear wheel assemblies mounted on the bottom of the cabinet close to the rear, corresponding to the tracks and slidably and rotatably mounted respectively in the rail slots of the tracks, and each rear wheel assembly having a bracket and a rear wheel mounted rotatably on the bracket and rotating and sliding on the rail slot of a corresponding track; 
   wherein a distance between the front wheel assemblies is larger than a distance between the rear wheel assemblies for stability of slide and rotation.   
     
     
         2 . The retractable cabinet device as claimed in  claim 1 , wherein
 each track further has two positioning recesses defined in the convex top surface respectively in the front end and the rear end of the rail slot; and   each rear wheel of each rear wheel assembly is positioned in one of the positioning recesses of the corresponding track.   
     
     
         3 . The retractable cabinet device as claimed in  claim 2 , wherein a diameter of the front wheel is larger than a diameter of the rear wheel. 
     
     
         4 . The retractable cabinet device as claimed in  claim 3 , wherein
 the base further has two alignment notches defined in the sides adjacent the front end of the base; and   the front wheel assemblies are located respectively in the alignment notches of the base when the cabinet retracts back above the base.   
     
     
         5 . The retractable cabinet device as claimed in  claim 4 , wherein the cabinet further has at least one rack mounted in the internal space of the cabinet. 
     
     
         6 . The retractable cabinet device as claimed in  claim 5 , wherein
 two mounting blocks are formed respectively in the mounting slots; and   each track further has a mounting recess defined in the bottom surface of the track and engaging the mounting block in a corresponding mounting slot of the base.   
     
     
         7 . The retractable cabinet device as claimed in  claim 6 , wherein the base further has
 a first side plate formed on one side of the base and having multiple assembling holes defined in the first side plate; and   a second side plate formed on the other side of the base and having multiple assembling posts formed on the second side plate and corresponding to the assembling holes.   
     
     
         8 . The retractable cabinet device as claimed in  claim 7 , wherein the tracks are detachably mounted respectively in the mounting slots of the base. 
     
     
         9 . (canceled) 
     
     
         10 . The retractable cabinet device as claimed in  claim 7 , wherein the base has multiple assembling slots defined in the base, and each assembling slot has a ballast detachably mounted in the assembling slot.