Ski binding, in particular a telemark ski binding, and ski provided with such a binding

Abstract

A binding having a front plate (2), a front assembly (3) for immobilising the boot and capable of cooperating with the sole (81) of the boot (8), a rear assembly (6) for retaining the boot and capable of cooperating with a retaining lug (85) of the rear portion of the front sole and/or with the rear sole, the rear assembly being movable relative to the front plate in the vertical plane, and tensioning means (66) which act between the rear retaining assembly (6) and the ski and/or the front plate (2) and which are capable of tensioning the boot (8) on the binding (1) and enabling the heel to be raised freely. The front immobilisation assembly is mounted in a floating manner on the front plate about a transverse pivot axis (A3), the supporting point enabling the front end (81′) of the sole (81) of the boot.

1 . Ski binding ( 1 ;  101 ;  201 ), in particular a ski touring, telemark or cross-country ski binding, for binding a ski boot ( 8 ;  208 ), including a sole ( 81 ;  281 ) and a heel ( 84 ;  284 ), said ski binding ( 1 ) including:
 a front plate ( 2 ;  102 ;  202 ), with reference to the direction of movement of the ski, this front plate being designed to be rigidly connected to the ski,   a front assembly ( 3 ;  103 ;  203 ) for immobilizing the boot, capable of cooperating with the sole ( 81 ;  281 ) of the boot ( 8 ;  208 ),   a rear assembly ( 6 ;  106 ;  206 ) for retaining the boot, with reference to the direction of movement of the ski, this assembly being capable of cooperating with a retaining lug ( 85 ;  285 ) of the rear portion of the front sole and/or with the rear sole, this rear assembly being movable with respect to said front plate in the vertical plane,   tensioning means ( 66 ;  266 ;  266 ′) which act between the rear retaining assembly ( 6 ,  106 ;  206 ) and the ski and/or the front plate ( 2 ,  102 ;  202 ), which are capable of tensioning the boot ( 8 ;  208 ) on the binding ( 1 ;  101 ;  201 ) and enabling the heel ( 84 ;  284 ) to be lifted freely,   characterized in that the front immobilization assembly ( 3 ,  103 ;  203 ) is mounted in a floating manner on the front plate, about a transverse pivot axis (A 3 ; A 103 ; A 203 ) located, in a longitudinal direction, in front of a so-called supporting point ( 32 ′) belonging to the front assembly, said supporting point enabling the front end ( 81 ′) of the sole ( 81 ;  281 ) of the boot to be supported,   the hinged axis (A 6 ) of the rear retaining assembly ( 6 ;  106 ;  206 ), with respect to the front plate ( 2 ,  102 ;  202 ), being distinct from the transverse pivot axis (A 3 ), this hinged axis (A 6 ) of the rear retaining assembly ( 6 ;  106 ) being located to the rear, with reference to the direction of movement of the ski, of this transverse pivot axis.   
     
     
         2 . Binding ( 1 ) according to  claim 1 , characterized in that the transverse pivot axis (A 3 ; A 103 ; A 203 ) is located, in the longitudinal direction, in front of a so-called stop point ( 36 ;  236 ) belonging to the front assembly, this stop point ( 36 ;  236 ) enabling the stopping of the front end of a locking lug ( 83 ;  283 ) belonging to the boot. 
     
     
         3 . Binding according to  claim 1 , characterized in that, the distance (L 36 ; L 236 ) separating, along a longitudinal direction, the transverse pivot axis (A 3 ; A 203 ) and the hinged axis (A 6 ; A 206 ) of the rear retaining assembly ( 6 ;  206 ) is between 20 and 120 mm, particularly between 35 mm and 80 mm. 
     
     
         4 . Binding according to  claim 1 , characterized in that the distance (X 3 ) separating, along a longitudinal direction, the transverse pivot axis (A 3 ) and the supporting point ( 32 ′) is between 0 and 40 mm, in particular between 0 and 25 mm. 
     
     
         5 . Binding according to  claim 1 , characterized in that the distance (Y 3 ) separating, along a vertical direction, the transverse pivot axis (A 3 ) and the supporting point ( 32 ′) is between −30 mm and +30 mm. 
     
     
         6 . Binding ( 1 ) according to  claim 1 , characterized in that the front immobilization assembly ( 3 ) of the boot comprises a toe piece ( 40 ) and a supporting member ( 30 ) of the boot, that can move mutually between an immobilization position and a boot release position, this front assembly further comprising a locking element ( 5 ) for mutually locking the toe piece and the supporting member, in said immobilization position. 
     
     
         7 . Binding ( 1 ) according to  claim 1 , characterized in that the front immobilization assembly ( 103 ) of the boot is made of one piece. 
     
     
         8 . Method for adjusting a ski binding ( 1 ;  101 ;  201 ), in particular a ski touring, telemark or cross-country ski binding, for binding a ski boot ( 8 ;  208 ), including a sole ( 81 ;  281 ) and a heel ( 84 ;  284 ), said ski binding ( 1 ) comprising:
 a front plate ( 2 ;  102 ;  202 ), designed to be rigidly connected to the ski,   a front assembly ( 3 ;  103 ;  203 ) for immobilizing the boot, capable of cooperating with the sole ( 81 ;  281 ) of the boot ( 8 ;  208 ),   a rear assembly ( 6 ;  106 ;  206 ) for retaining the boot, capable of cooperating with a retaining lug ( 85 ;  285 ) of the rear portion of the front sole and/or with the rear sole, this rear assembly being movable with respect to said front plate in the vertical plane,   tensioning means ( 66 ;  266 ;  266 ′) which act between the rear retaining assembly ( 6 ;  106 ;  206 ) and the ski and/or the front plate ( 2 ,  102 ;  202 ), which are capable of tensioning the boot ( 8 ;  208 ) on the binding ( 1 ;  101 ;  201 ) and enabling the heel ( 84 ;  284 ) to be lifted freely,   this method being characterized in that the front immobilization assembly ( 3 ,  103 ;  203 ) is mounted in a floating manner on the front plate, about a transverse pivot axis (A 3 ; A 103 ; A 203 ),   the hinged axis (A 6 ) of the rear retaining assembly ( 6 ;  106 ;  206 ), with respect to the front plate ( 2 ,  102 ;  202 ), is distinct from the transverse pivot axis (A 3 ), this hinged axis (A 6 ) of the rear retaining assembly ( 6 ;  106 ) being located to the rear, with reference to the direction of movement of the ski, of this transverse pivot axis, and   in that the positioning of the pivot axis is adjusted and, where applicable, the tensioning means are adjusted such that, in a first flexion phase, the front immobilization assembly ( 3 ,  103 ;  203 ) does not pivot substantially and, in a second greater boot flexion phase, this front immobilization assembly ( 3 ,  103 ;  203 ) pivots with respect to the plate.   
     
     
         9 . Method according to  claim 8 , wherein the distance (L 36 ; L 236 ) separating, along a longitudinal direction, the transverse pivot axis (A 3 ; A 203 ) and the hinged axis (A 6 ; A 206 ) of the rear retaining assembly is furthermore adjusted. 
     
     
         10 . Ski comprising a binding ( 1 ;  101 ;  201 ) according to  claim 1 .