Flat-Blade Windscreen Wiper Blade Comprising An Aerodynamic Deflector

Abstract

The invention provides a blade ( 10 ) comprising a central rigidifying element ( 20 ), a wiping strip ( 14 ) and an element ( 16 ) forming an aerodynamic deflector that has a contour (AE-FM-MA) with an overall triangular shape comprising a front side (AE) that delimits the side of the aerodynamic deflector ( 16 ) that faces the wind, characterised in that the ratio (H/L) of the total height (H) of the windscreen wiper blade ( 10 ) to the overall transversal width (L) of the windscreen wiper blade ( 10 ), is comprised between 1.5 and 2.

1 . Windscreen wiper blade of a motor vehicle of the type comprising:
 a rigidifying central longitudinal element;   a strip for wiping the window to be wiped, which extends longitudinally below the central element and which comprises a bottom longitudinal wiping edge that cooperates with the top face of the window to be wiped; and   an element forming an aerodynamic deflector, which extends longitudinally above the central rigidifying element and along at least one section of the latter, and which, in a cross-section according to a vertical plane, has a contour with an overall triangular shape comprising a bottom horizontal side forming a base, a front side which delimits the side of the aerodynamic deflector that faces the wind, said front side comprising a bottom section, an intermediate section substantially forming a concave arc of circle, and a top end section, a rear side with an overall vertical orientation that delimits the side behind the wind of the deflector and which is connected to the front side by a section that delimits the top longitudinal edge with a top free end of the deflector,   characterised in that the ratio (H/L) of the total height (H) of the windscreen wiper blade separating the top edge of the aerodynamic deflector from the bottom wiping edge, to the overall transversal width (L) of the windscreen wiper blade, measured on the plane of the rigidifying element, is comprised between 1.5 and 2.   
   
   
       2 . Windscreen wiper blade according to the preceding claim, characterised in that the bottom section is substantially rectilinear and forms an acute angle in relation to the bottom horizontal edge. 
   
   
       3 . Windscreen wiper blade according to the preceding claim, characterised in that said acute angle is comprised between 5 and 35 degrees. 
   
   
       4 . Windscreen wiper blade according to  claim 2 , characterised in that the bottom section extends substantially to the right of a median vertical plane of the central rigidifying element and of the bottom wiping strip. 
   
   
       5 . Windscreen wiper blade according to  claim 1 , characterised in that the radius R of said concave intermediate section is comprised between 50% and 70% of said total overall width. 
   
   
       6 . Windscreen wiper blade according to  claim 1 , characterised in that said top end section of the front side is substantially rectilinear and has a vertical orientation. 
   
   
       7 . Windscreen wiper blade according to  claim 1 , characterised in that the top end section of the front side substantially forms a convex arc of circle. 
   
   
       8 . Windscreen wiper blade according to  claim 6 , characterised in that said top end section of the front side extends over a marginal vertical height comprised between 15% and ≦25% of the total height of the aerodynamic deflector. 
   
   
       9 . Windscreen wiper blade according to  claim 1 , characterised in that the rear side of the triangular contour comprises a top section that is overall parallel to a top section of the front side. 
   
   
       10 . Windscreen wiper blade according to  claim 1 , characterised in that the rear side of the triangular contour comprises an intermediate section that is overall parallel to an intermediate section of the front side. 
   
   
       11 . Windscreen wiper blade according to  claim 9 , characterised in that the top rectilinear section of the rear side extends to the right of the rear lateral edge of the central rigidifying element. 
   
   
       12 . Windscreen wiper blade according to  claim 1 , characterised in that the rear side of the triangular contour comprises a bottom section forming a concave arc of circle. 
   
   
       13 . Windscreen wiper blade according to the preceding claim, characterised in that the most transversally internal point of the bottom section forming a concave arc of circle of the rear side is located transversally set back towards the inside in relation to the rear lateral edge of the central rigidifying element. 
   
   
       14 . Windscreen wiper blade according to the preceding claim, characterised in that the horizontal distance that separates the most internal point of the rear lateral edge from the central support element is comprised between 15% and 25% of said total overall width. 
   
   
       15 . Windscreen wiper blade according to  claim 1 , characterised in that the section that delimits the top edge of the aerodynamic deflector is semi-circular in shape. 
   
   
       16 . Windscreen wiper blade according to  claim 9 , characterised in that the thickness of the top part of the aerodynamic deflector separating the two vertical and rectilinear top sections is comprised between 8% and 15% of said total overall width. 
   
   
       17 . Windscreen wiper blade according to  claim 3 , characterised in that the bottom section extends substantially to the right of a median vertical plane of the central rigidifying element and of the bottom wiping strip. 
   
   
       18 . Windscreen wiper blade according to  claim 7 , characterised in that said top end section of the front side extends over a marginal vertical height comprised between 15% and ≦25% of the total height of the aerodynamic deflector.