Extension guide

Abstract

The invention relates to an extension guide ( 1 ) for mounting a movable furniture part linearly movably along an extension direction ( 2 ), comprising a carcass rail ( 10 ) which can be fixed to a furniture carcass, a drawer rail ( 50 ) which can be fixed to the movable furniture part, a linearly movable center rail ( 30 ) arranged between the carcass rail ( 10 ) and the drawer rail ( 50 ), at least one load-transmitting outer carriage ( 40 ) arranged between the center rail ( 30 ) and the drawer rail ( 50 ), and a synchronizing device ( 60 ). Improved wear resistance is achieved in that the synchronizing device ( 60 ) is effective between the carcass rail ( 10 ) and the outer carriage ( 40 ).

1 - 15 . (canceled) 
     
     
         16 : An extension guide for mounting a movable furniture part linearly movably along an extension direction, the extension guide comprising:
 a carcass rail configured to be attached to a furniture carcass;   a drawer rail configured to be attached to the movable furniture part;   a linearly movable center rail arranged between the carcass rail and the drawer rail;   at least one load-transmitting outer carriage arranged between the center rail and the drawer rail; and   a synchronizer configured to synchronize movement of the outer carriage relative to the carcass rail.   
     
     
         17 : The extension guide of  claim 16 , wherein:
 the synchronizer includes at least a first running surface and a second running surface, and at least one synchronizing wheel configured to roll on at least one of the running surfaces;   wherein the first running surface is connected to the carcass rail indirectly or directly so that the first running surface is fixed relative to the carcass rail.   
     
     
         18 : The extension guide of  claim 17 , wherein:
 the second running surface is connected directly or indirectly to the outer carriage.   
     
     
         19 : The extension guide of  claim 17 , wherein:
 the at least one synchronizing wheel is rotatably mounted on the center rail.   
     
     
         20 : The extension guide of  claim 17 , wherein:
 at least one of the running surfaces is a toothed surface and the at least one synchronizing wheel is a pinion wheel.   
     
     
         21 : The extension guide of  claim 17 , wherein:
 the at least one synchronizing wheel includes a first synchronizing wheel which rolls on the first running surface and a second synchronizing wheel which rolls on the second running surface.   
     
     
         22 : The extension guide of  claim 21 , wherein:
 the first and second synchronizing wheels are rotationally fixed relative to one another.   
     
     
         23 : The extension guide of  claim 21 , wherein:
 one of the first and second synchronizing wheels includes a head portion and a shaft portion; and   the other of the first and second synchronizing wheels includes a hub configured to at least partially receive the shaft portion such that the first and second synchronizing wheels are rotationally fixed relative to each other.   
     
     
         24 : The extension guide of  claim 23 , wherein:
 the shaft includes a first spline and the hub includes a second spline configured to mate with the first spline such that a torque can be transmitted between the first and second synchronizing wheels.   
     
     
         25 : The extension guide of  claim 23 , wherein:
 the center rail includes a wall having a shaft opening through the wall; and   the shaft portion of the first synchronizing wheel extends through the shaft opening and the first and second synchronizing wheels are located on opposite sides of the wall.   
     
     
         26 : The extension guide of  claim 23 , wherein:
 the synchronizer further includes a synchronizing wheel holder detachably mounted on the center rail, the synchronizing wheel holder including a receiving space, a bearing portion on one side of the receiving space and a bearing receptacle on an opposite side of the receiving space;   the first synchronizing wheel is at least partially received in the receiving space; and   the shaft portion of the second synchronizing wheel is guided through the bearing portion and a bearing projection of the shaft portion is rotatably received in the bearing receptacle.   
     
     
         27 : The extension guide of  claim 26 , wherein:
 the center rail includes a wall and a hook shaped retainer and a latching aperture;   the synchronizing wheel holder includes a tongue shaped holding projection received between the wall and the hook shaped retainer; and   the synchronizing wheel holder includes a hook shaped holding lug received in the latching aperture of the center rail.   
     
     
         28 : The extension guide of  claim 21 , wherein:
 a ratio of a diameter of the first synchronizing wheel to a diameter of the second synchronizing wheel is greater than or equal to 1.   
     
     
         29 : The extension guide of  claim 21 , wherein:
 a ratio of a diameter of the first synchronizing wheel to a diameter of the second synchronizing wheel is greater than or equal to 1.5.   
     
     
         30 : The extension guide of  claim 21 , wherein:
 a ratio of a diameter of the first synchronizing wheel to a diameter of the second synchronizing wheel is equal to 2.   
     
     
         31 : The extension guide of  claim 16 , wherein:
 the first running surface is provided on at attaching element detachably connected to the carcass rail.   
     
     
         32 : The extension guide of  claim 31 , wherein:
 the attaching element includes at least two attaching segments, the first running surface being partially located on each attaching segment.   
     
     
         33 : The extension guide of  claim 31 , wherein:
 the attaching element is detachably connected to the carcass rail by at least one latching connection including a hook-shaped receiving element provided on the carcass rail and a receptacle defined in the attaching element, the hook-shaped receiving element being at least partially received in the receptacle; and   the attaching element includes at least one latching projection received in a positioning receptacle defined in the carcass rail, the latching projection being at least partially received in the positioning receptacle.   
     
     
         34 : The extension guide of  claim 16 , further comprising:
 a first guide configured for guiding the center rail and for supporting the center rail transversely to an extension direction, the first guide being fixedly connected to the carcass rail directly or indirectly.   
     
     
         35 : The extension guide of  claim 34 , wherein:
 the first guide is located adjacent the first running surface.