Coupling system for a suction device having guide contours, coupling elements, a suction-air-guiding component and suction device

Abstract

A coupling system connects to different suction-air-guiding components of a suction device. The coupling system has a first coupling element with a connecting piece and a second coupling element with a receiving region for the connecting piece. The first coupling element further has a first plug-in unit, and the second coupling element has a second plug-in unit which forms an electrically conductive plug-in connection together with the first plug-in unit of the first coupling element. The connecting piece has a guide contour, and the second coupling element has a guide contour which is complementary thereto. The first plug-in unit has a depression with a wall which, starting from the bearing surface of the first coupling element, extends along the longitudinal axis into the housing of the first coupling element, and the guide contour on the connecting piece of the first coupling element extends along the longitudinal axis into the depression.

1 . A coupling system for connecting to different suction-air-guiding components of a suction device, the coupling system comprising:
 a first coupling element having a housing, a bearing surface and a tubular connecting piece protruding along a longitudinal axis relative to said bearing surface of said first coupling element;   a second coupling element having a housing, a bearing surface and a tubular receiving region for receiving said tubular connecting piece of said first coupling element, wherein said tubular receiving region extends starting from said bearing surface of said second coupling element along the longitudinal axis into said housing of the second coupling element;   said first coupling element further having at least a first plug-in unit which is disposed next to said tubular connecting piece along a transverse axis, wherein said first plug-in unit has a wall with a depression formed therein, said wall extends starting from said bearing surface of said first coupling element along the longitudinal axis into said housing of said first coupling element;   said second coupling element having at least a second plug-in unit which is disposed next to said tubular receiving region along the transverse axis, said second plug-in unit is configured so as to form an electrically conductive plug-in connection together with said first plug-in unit of said first coupling element;   said tubular connecting piece of said first coupling element having a guide contour, wherein said guide contour on said tubular connecting piece of said first coupling element extends along the longitudinal axis into said depression;   said second coupling element having a guide contour which is complementary thereto; and   said guide contours of said first and second coupling elements are configured so as to interact with one another such that a twisting of said first coupling element relative to said second coupling element about the longitudinal axis is blocked by said guide contours.   
     
     
         2 . The coupling system according to  claim 1 , wherein said guide contour on said tubular connecting piece of said first coupling element extends along the longitudinal axis starting from said bearing surface of said first coupling element by 1 mm or more into said depression of said first plug-in unit of said first coupling element. 
     
     
         3 . The coupling system according to  claim 1 , wherein:
 said guide contour on said tubular connecting piece of said first coupling element has a total length along the longitudinal axis;   the total length is 6 cm or more; and   said guide contour on said tubular connecting piece of said first coupling element extends along the longitudinal axis starting from said bearing surface of said first coupling element by 1% or more of the total length into said depression of said first plug-in unit of said first coupling element.   
     
     
         4 . The coupling system according to  claim 1 , wherein:
 said guide contour of said first coupling element has a guide rib which is disposed on an outer wall of said tubular connecting piece, and said guide rib extends along the longitudinal axis into said depression of said first plug-in unit of said first coupling element; and   said guide contour of said second coupling element has a guide groove formed therein which extends along the longitudinal axis.   
     
     
         5 . The coupling system according to  claim 1 , wherein:
 said second plug-in unit of said second coupling element has a protective wall which protrudes along the longitudinal axis relative to said bearing surface of said second coupling element; and   said guide contour of said second coupling element, beginning at said protective wall of said second plug-in unit, extends along the longitudinal axis into said tubular receiving region.   
     
     
         6 . The coupling system according to  claim 1 , wherein:
 said first coupling unit has one said first plug-in unit on each of two sides of said tubular connecting piece along the transverse axis;   said second coupling unit has one said second plug-in unit on each of two sides of said tubular receiving region along the transverse axis;   said two first plug-in units and said two second plug-in units each form in pairs an electrically conductive plug-in connection;   said tubular connecting piece of said first coupling element has one said guide contour on each of two sides of said tubular connecting piece along the transverse axis;   said guide contours on said tubular connecting piece of said first coupling element each extend along the longitudinal axis into said depression of each said first plug-in unit of said first coupling element;   said second coupling element has one said guide contour which is complementary thereto on each of said two sides of said tubular receiving region along the transverse axis; and   said guide contours of said first and second coupling elements are each constructed in pairs so as to interact with one another such that a twisting of said first coupling element relative to said second coupling element about the longitudinal axis is blocked by said guide contours.   
     
     
         7 . The coupling system according to  claim 1 , wherein:
 said first plug-in unit of said first coupling element and said second plug-in unit of said second coupling element each intersect a horizontal plane spanned by the transverse axis and by the longitudinal axis; and   said guide contour of each of said first coupling element and of said second coupling element each intersect the horizontal plane.   
     
     
         8 . The coupling system according to  claim 2 , wherein said guide contour on said tubular connecting piece of said first coupling element extends along the longitudinal axis starting from said bearing surface of said first coupling element by 2 mm or more into said depression of said first plug-in unit of said first coupling element. 
     
     
         9 . The coupling system according to  claim 5 , wherein said guide contour is a guide groove. 
     
     
         10 . A first coupling element for a coupling system, the first coupling element comprising:
 a bearing surface;   a tubular connecting piece protruding along a longitudinal axis relative to said bearing surface, and is configured so as to be plugged into a tubular receiving region of a second coupling element of the coupling system which extends starting from a bearing surface of the second coupling element along a longitudinal axis into a housing of the second coupling element;   at least a first plug-in unit disposed next to said tubular connecting piece along a transverse axis, and is configured so as to form an electrically conductive plug-in connection together with a second plug-in unit of the second coupling element, wherein the second plug-in unit of the second coupling element is disposed next to the tubular receiving region along the transverse axis;   a housing;   said first plug-in unit has a wall with a depression formed therein, said wall extending starting from said bearing surface of the first coupling element along the longitudinal axis into said housing of said first coupling element;   said tubular connecting piece of said first coupling element has an outer wall and a guide contour disposed on said outer wall of said tubular connecting piece and which faces said first plug-in unit, said guide contour on said tubular connecting piece of said first coupling element extends along the longitudinal axis into said depression of said first plug-in unit of the first coupling element; and   said guide contour of the first coupling element is constructed so as to interact with a complementary guide contour of the second coupling element such that a twisting of the first coupling element relative to the second coupling element about the longitudinal axis is blocked by said guide contour and the complementary guide contour.   
     
     
         11 . A second coupling element for a coupling system, the second coupling element comprising:
 a bearing surface;   a housing;   a tubular receiving region for receiving a connecting piece of a first coupling element of the coupling system, said tubular receiving region extending, starting from said bearing surface of said second coupling element, along a longitudinal axis into said housing of the second coupling element, wherein the tubular connecting piece of the first coupling element protrudes along a longitudinal axis relative to a bearing surface of the first coupling element;   a second plug-in unit disposed next to said tubular receiving region along a transverse axis, and is configured so as to form an electrically conductive plug-in connection together with a first plug-in unit of the first coupling element, wherein the first plug-in unit of the first coupling element is disposed next to the tubular connecting piece along the transverse axis, and the first plug-in unit has a wall with a depression formed therein, wherein the wall extends starting from the bearing surface of the first coupling element along the longitudinal axis into a housing of the first coupling element;   a complementary guide contour constructed so as to be complementary to a guide contour on the tubular connecting piece of the first coupling element, wherein the guide contour on the tubular connecting piece of the first coupling element extends along the longitudinal axis into the depression of the first plug-in unit of the first coupling element; and   said complementary guide contour of the second coupling element is configured so as to interact with the guide contour of the first coupling element such that a twisting of the first coupling element relative to the second coupling element about the longitudinal axis is blocked by the guide contour and said complementary guide contour.   
     
     
         12 . A suction-air-guiding component for a suction device, the suction-air-guiding component comprising:
 said first coupling element according to claim  10 .   
     
     
         13 . A suction-air-guiding component for a suction device, the suction-air-guiding component comprising:
 said second coupling element according to claim  11 .   
     
     
         14 . A suction-air-guiding component for a suction device, the suction-air-guiding component comprising:
 a first coupling element having a bearing surface and a tubular connecting piece protruding along a longitudinal axis relative to said bearing surface;   a second coupling element having a housing, a bearing surface and a tubular receiving region extending starting from said bearing surface of said second coupling element along a longitudinal axis into said housing of said second coupling element, said tubular connecting piece of said first coupling element configured for plugging into said tubular receiving region of said second coupling element;   said first coupling element having at least a first plug-in unit disposed next to said tubular connecting piece along a transverse axis;   said second coupling element having a second plug-in unit, said second plug-in unit of said second coupling element is disposed next to said tubular receiving region along the transverse axis, said first plug-in unit being configured so as to form an electrically conductive plug-in connection together with said second plug-in unit;   said first plug-in unit having a wall with a depression formed therein, said wall extending starting from said bearing surface of said first coupling element along the longitudinal axis into said housing of said first coupling element;   said tubular connecting piece of said first coupling element having an outer wall and a guide contour disposed on said outer wall of said tubular connecting piece and which faces said first plug-in unit, said guide contour on said tubular connecting piece of said first coupling element extends along the longitudinal axis into said depression of said first plug-in unit of said first coupling element; and   said second coupling element having a complementary guide contour, said guide contour of said first coupling element is configured so as to interact with said complementary guide contour of said second coupling element such that a twisting of said first coupling element relative to said second coupling element about the longitudinal axis is blocked by said guide contour and said complementary guide contour.   
     
     
         15 . A suction device, comprising:
 said coupling system according to  claim 1 .