Slide rail assembly and cabinet comprising the same

Abstract

The present invention relates to the technical field of furniture and discloses a slide rail assembly which comprises a top rail, a middle rail and a bottom rail. The top rail and the middle rail slide relative to each other through a first rolling element, and the middle rail and the bottom rail slide relative to each other through a second rolling element. A first bending portion of the middle rail is inserted into a first cavity and a second bending portion is inserted into a second cavity. A gear is provided between a first serrated edge of a first bracket and a second serrated edge of a second bracket and meshes with the first and second serrated edges, so that the top rail, the middle rail and the bottom rail can be linked. The present invention also discloses a cabinet adopting the slide rail assembly.

1 . A slide rail assembly, wherein the slide rail assembly comprises a top rail, a middle rail and a bottom rail arranged in sequence from top to bottom;
 the top rail defines a first cavity and is provided with a first opening communicated with the first cavity, the bottom rail defines a second cavity and is provided with a second opening communicated with the second cavity, and the first opening and the second opening are arranged opposite to each other; the middle rail comprises a first bending portion, a transition portion, and a second bending portion connected in sequence, and the first bending portion is inserted into the first cavity through the first opening, and the second bending portion is inserted into the second cavity through the second opening;   a first bracket is provided between the first bending portion and the top rail to separate the first bending portion and the top rail, and the first bracket is provided with a first hole in which a first rolling element in contact with the first bending portion and the top rail is provided; a second bracket is provided between the second bending portion and the bottom rail to separate the second bending portion and the bottom rail, and the second bracket is provided with a second hole in which a second rolling element in contact with the second bending portion and the bottom rail is provided; and   the first bracket is provided with a first serrated edge along a length direction of the first bracket, the second bracket is provided with a second serrated edge along a length direction of the second bracket, a gear is provided between the first serrated edge and the serrated edge and meshes with the first serrated edge and the second serrated edge, and the gear is connected to the transition portion through a rotating shaft.   
     
     
         2 . The slide rail assembly of  claim 1 , wherein the first bracket is provided with three first rolling units, each being composed of a plurality of first rolling elements arranged along the length direction of the first bracket; the three first rolling units are arranged in an inverted triangle viewed from a cross-section direction of the first bracket, two first rolling units are arranged above the first bending portion, and another first rolling unit is arranged below the first bending portion; and
 the second bracket is provided with three second rolling units, each being composed of a plurality of second rolling elements arranged along the length direction of the second bracket; the three first rolling units are arranged in an upright triangle viewed from a cross-section direction of the second bracket, two second rolling units are arranged below the second bending portion, and another second rolling unit is arranged above the second bending portion.   
     
     
         3 . The slide rail assembly of  claim 2 , wherein the first bending portion, the transition portion, and the second bending portion together enclose a sliding cavity;
 a side of the first bending portion facing away from the sliding cavity is provided with two first guide grooves extending along a length direction of the first bending portion, and the two first guiding grooves are respectively used for accommodating two first rolling elements of the two first rolling units arranged above the first bending portion; a side of the first bending portion facing toward the sliding cavity is provided with one first guide groove extending along the length direction of the first bending portion, and the one first guiding groove is used for accommodating one first rolling element of the another first rolling unit arranged below the first bending portion; and   a side of the second bending portion facing away from the sliding cavity is provided with two second guide grooves extending along a length direction of the second bending portion, and the two second guiding grooves are respectively used for accommodating two second rolling elements of the two second rolling units arranged below the second bending portion; a side of the second bending portion facing toward the sliding cavity is provided with one second guide groove extending along the length direction of the second bending portion, and the one second guiding groove is used for accommodating one second rolling element of the another second rolling unit arranged above the second bending portion.   
     
     
         4 . The slide rail assembly of  claim 3 , wherein two ends of the first bending portion are respectively provided with a first protrusion and a second protrusion protruding away from the sliding cavity, and the first bracket is defined between the first protrusion and the second protrusion. 
     
     
         5 . The slide rail assembly of  claim 3 , wherein two ends of the second bending portion are respectively provided with a third protrusion and a fourth protrusion protruding away from the sliding cavity, and the second bracket is defined between the third protrusion and the fourth protrusion. 
     
     
         6 . The slide rail assembly of  claim 3 , wherein a rear end of the top rail is provided with a fifth protrusion protruding toward the first cavity, a front end of the top rail is provided with a regulating screw, and the first bracket is defined between the fifth protrusion and the regulating screw. 
     
     
         7 . The slide rail assembly of  claim 3 , wherein two ends of the bottom rail are respectively provided with a sixth protrusion and a seventh protrusion protruding toward the second cavity, and the second bracket is defined between the sixth protrusion and the seventh protrusion. 
     
     
         8 . The slide rail assembly of  claim 1 , wherein a front end of the top rail is further provided with a limiting member comprising a clamping portion adapted to the first cavity and a baffle provided at a front end of the clamping portion, and the clamping portion is inserted into the first cavity to realize connection between the limiting member and the top rail. 
     
     
         9 . The slide rail assembly of  claim 1 , wherein the bottom rail is provided with a mounting plate disposed vertically, and the mounting plate is provided with a plurality of connecting holes. 
     
     
         10 . A cabinet, wherein the cabinet comprises a cabinet body, one or more drawers, and one or more slide rail assemblies of  claim 1 , the drawers are arranged inside the cabinet body; a bottom rail of the slide rail assembly is fixed to an inner side of the cabinet body, and a top rail of the slide rail assembly is fixed to a bottom surface of the drawer. 
     
     
         11 . A cabinet, wherein the cabinet comprises a cabinet body, one or more drawers, and one or more slide rail assemblies of  claim 2 , the drawers are arranged inside the cabinet body; a bottom rail of the slide rail assembly is fixed to an inner side of the cabinet body, and a top rail of the slide rail assembly is fixed to a bottom surface of the drawer. 
     
     
         12 . A cabinet, wherein the cabinet comprises a cabinet body, one or more drawers, and one or more slide rail assemblies of  claim 3 , the drawers are arranged inside the cabinet body; a bottom rail of the slide rail assembly is fixed to an inner side of the cabinet body, and a top rail of the slide rail assembly is fixed to a bottom surface of the drawer. 
     
     
         13 . A cabinet, wherein the cabinet comprises a cabinet body, one or more drawers, and one or more slide rail assemblies of  claim 4 , the drawers are arranged inside the cabinet body; a bottom rail of the slide rail assembly is fixed to an inner side of the cabinet body, and a top rail of the slide rail assembly is fixed to a bottom surface of the drawer. 
     
     
         14 . A cabinet, wherein the cabinet comprises a cabinet body, one or more drawers, and one or more slide rail assemblies of  claim 5 , the drawers are arranged inside the cabinet body; a bottom rail of the slide rail assembly is fixed to an inner side of the cabinet body, and a top rail of the slide rail assembly is fixed to a bottom surface of the drawer. 
     
     
         15 . A cabinet, wherein the cabinet comprises a cabinet body, one or more drawers, and one or more slide rail assemblies of  claim 6 , the drawers are arranged inside the cabinet body; a bottom rail of the slide rail assembly is fixed to an inner side of the cabinet body, and a top rail of the slide rail assembly is fixed to a bottom surface of the drawer. 
     
     
         16 . A cabinet, wherein the cabinet comprises a cabinet body, one or more drawers, and one or more slide rail assemblies of  claim 7 , the drawers are arranged inside the cabinet body; a bottom rail of the slide rail assembly is fixed to an inner side of the cabinet body, and a top rail of the slide rail assembly is fixed to a bottom surface of the drawer. 
     
     
         17 . A cabinet, wherein the cabinet comprises a cabinet body, one or more drawers, and one or more slide rail assemblies of  claim 8 , the drawers are arranged inside the cabinet body; a bottom rail of the slide rail assembly is fixed to an inner side of the cabinet body, and a top rail of the slide rail assembly is fixed to a bottom surface of the drawer. 
     
     
         18 . A cabinet, wherein the cabinet comprises a cabinet body, one or more drawers, and one or more slide rail assemblies of  claim 9 , the drawers are arranged inside the cabinet body; a bottom rail of the slide rail assembly is fixed to an inner side of the cabinet body, and a top rail of the slide rail assembly is fixed to a bottom surface of the drawer.