Drawer slide

Abstract

The invention concerns a drawer slide that has a swiveling double-armed lever around a pivot bearing and whose lever arms extend out from the pivot bearing and whose first lever arm, depending on the closed position, forms a positive/form-fitting connection between a linearly moving part and a cabinet-fixed part of the drawer slide, and whose second lever arm is connected to the draw-pull tension spring's first end and the second end of the draw-pull tension spring, distanced from it by under spring extension to a linearly moved or cabinet-fixed part of the drawer slide, is fastened. When the drawer is pushed in, the form-closure of the lever's first arm is turned out of a rest position over a dead center position in an automatic position, such that a further turn of the lever automatically shortens the pre-stressed spring on the second lever arm, so thus, pulling the drawer slide with the drawer into the cabinet opening. The advantage of the drawer slide with the invention-related self-closing mechanism is that after the ‘over-snapping’ of the lever's dead center position, which affects the spring action of the draw-pull tension spring on the turning lever in such a way that the torque increases on the lever with increasing pulling distance of the drawer. Thereby, the result is that the pulling force, which is directly proportional to the torque on the lever that affects the drawer, is small at the beginning of the self-closing cycle, but becomes greater with the increasing pulled distance so the retaining strength is the greatest when the drawer is closed completely.

1 . The drawer slide with self-closing mechanism with flexible springy self-closing pull-in element, has on each of the two drawer sides a slide system that has on at least one connectable cabinet rail ( 2 ) on a cabinet body, which is linearly movable by a linear bearing ( 3 , 5 ) on a drawer rail ( 6 ) is characterized by a double-armed lever ( 10 ) that is provided around a pivot bearing ( 11 ) on the drawer slide as a self-closing mechanism for the drawer and whose first lever arm ( 13 ), by means of a turning motion together with the closing position, forms a positive form-fitting and/or friction-fitting connection between a linearly moving part and a cabinet-fixed part of the drawer slide, and on whose second lever arm ( 12 ) is connected to a first end of the draw-pull tension spring ( 14 ) and is distanced to the second end of the draw-pull tension spring ( 14 ) by a spring tension that is connected to a linearly moving or cabinet-fixed part of the drawer slide; whereby, when the drawer is pushed in, the form closure/positive locking of the first lever arm ( 13 ) causes the lever ( 10 ) to turn out of the engagement position over a dead center position in an automatic position, in which a further turn of the lever ( 10 ) shortens automatically the pull-draw tension spring ( 14 ) on the second lever arm ( 12 ) and causes the drawer slide with the drawer to be pulled into the cabinet opening.  
     
     
         2 . Drawer slide, according to  claim 1 , is characterized by the double-armed lever ( 10 ) is attached swiveling on a movable part of the drawer slide and its first lever arm ( 12 ), starting from a certain closing position of the drawer, positively/form-fitting and/or friction-fitting engages with a stationary part of the drawer slide.  
     
     
         3 . Drawer slide, according to  claim 2 , is characterized by the double-armed lever ( 10 ) that is attached swiveling on the drawer rail ( 6 ) or on one of the drawer rail's ( 6 ) fastened décor ( 7 ) and its first lever arm ( 12 ), starting from a certain closing position of the drawer, engages positively/form-fitting with it by means of a stationary stop ( 17 ) on the cabinet rail ( 2 ) or by a cabinet angle ( 1 ) attached on it.  
     
     
         4 . Drawer slide, according to  claim 1 , is characterized by the double-armed lever ( 10 ) that is attached swiveling on a stationary part of the drawer slide and its first lever arm ( 12 ), starting from a certain closing position of the drawer, engages positively/form-fitting and/or friction-fitting with a moveable part of the drawer slide.  
     
     
         5 . Drawer slide, according to  claim 2 , is characterized by the double-armed lever ( 10 ) that is attached swiveling on the cabinet rails ( 2 ) or on a cabinet angle ( 1 ) attached on it and its first lever arm ( 12 ), starting from a certain closing position of the drawer, is attached by a positive/form-fitting engagement by a stationary stop ( 17 ) on the drawer rail ( 6 ) or on one of the fastened decors ( 7 ) on the drawer rail ( 6 ).  
     
     
         6 . Drawer slide, according to one of the  claims 1  to  5 , is characterized by the lever ( 10 ) and the suspension point ( 16 ) of the spring's ( 14 ) second end that are fastened on the same component unit and, so no substantial relative motion results between the pivot bearing ( 11 ) of the lever ( 10 ) and the suspension point ( 16 ) of the spring's ( 14 ) second end.  
     
     
         7 . Drawer slide, according to  claim 6 , is characterized by the fact that both the pivot bearing ( 11 ) of the lever ( 10 ) and the suspension point ( 16 ) of the second end of the spring ( 14 ) are located on the décor ( 7 ).  
     
     
         8 . Drawer slide, according to one of the  claims 1  to  7 , is characterized by the spring's ( 14 ) fastening point ( 16 ) lies in a common horizontal and/or vertical level with the double-armed lever's ( 10 ) pivot bearing ( 11 ).  
     
     
         9 . Drawer slide, according to one of the  claims 1  to  8 , is characterized by the lever's ( 10 ) pivot bearing ( 11 ) and the spring's ( 14 ) fastening point ( 15 ) on the second lever arm ( 12 ) in the push-in direction are provided before the spring's ( 14 ) fastening point ( 16 ) on the linearly moving and/or stationary part of the drawer slide.  
     
     
         10 . Drawer slide, according to one of the  claims 1  to  9 , is characterized by the spring's ( 14 ) fastening point ( 15 ) is provided on the second lever arm ( 12 ) in the push-in direction during the rotation that is always before the pivot bearing ( 11 ) or directly vertically over it.  
     
     
         11 . Drawer slide, according to one of the  claims 1  to  10 , is characterized by the fact that both lever arms ( 12 , 13 ) of the lever ( 10 ) have different lengths.  
     
     
         12 . Drawer slide, according to  claim 11 , is characterized by the lever arm ( 13 ) for the coupling between the moved and motionless parts and is longer than the second lever arm ( 12 ) on which the spring ( 14 ) is secured.  
     
     
         13 . Drawer slide, according to one of the  claims 11  to  12 , is characterized by the relation of the lever arm's ( 12 , 13 ) lengths that lie between  2  and  3 .  
     
     
         14 . Drawer slide, according to one of the  claims 1  to  13 , is characterized by the angle between the lever arms ( 12 , 13 ) that lie between 100° and 140°.  
     
     
         15 . Drawer slide, according to one of the  claims 1  to  14 , is characterized by the rest position of the second lever arm ( 12 ) that is in the range of between minus 1° and minus 30°, depending on the vertical dead center position (0°).  
     
     
         16 . Drawer slide, according to one of the  claims 11  to  15 , is characterized by the fact that when the drawer (in the closed position/end position) is completely inserted or pulled into the cabinet, the lever arm ( 12 ) is in the range of between plus 45° and plus 90°, depending on the vertical dead center position (0°).  
     
     
         17 . Drawer slide, according to one of the  claims 1  to  16 , is characterized by the fact that when the drawer is in its closed pulled position/end position, the spring's ( 14 ) length corresponds somewhat to the length of the first lever arm ( 13 ).  
     
     
         18 . Drawer slide, according to one of the  claims 1  to  17 , is characterized by the drawer's damping movement that takes place while the self-closing mechanism in the lever's ( 10 ) automatic position is operating.  
     
     
         19 . Drawer slide, according to  claim 18 , is characterized by the drawer's damping movement that takes place by means of the lever's ( 10 ) damping movement.  
     
     
         20 . Drawer slide, according to  claim 19 , is characterized by the lever's ( 10 ) damping movement that takes place by means of the pivot bearing's ( 11 ) rotation damping.