Patent ID: 8789245

Claim:
A clasp comprising an extensible buckle for a wrist strap making it possible to adjust the length of the wrist strap, said clasp comprising: a first strip and a second strip ( 10 , 11 ) which are articulated to one another at a first end, a first tie ( 12 a ) which is arranged at a second end of the first strip ( 10 ) for connection to a first strand of the wrist strap, a second tie ( 13 ) which is arranged at a second end of the second strip ( 11 ) for connection to a second strand of the wrist strap, indexing means whereby the second tie ( 13 ) can occupy different indexed positions with respect to the second end of the second strip ( 11 ), characterised in that the second tie ( 13 ) is connected to a cradle ( 16 ) which is arranged in a housing ( 17 ) located on the second strip ( 11 ), the housing ( 17 ) comprising two opposite walls ( 18 , 18 ′) along which the cradle ( 16 ) can slide, and in that the clasp further comprises a tab ( 19 ) which is connected to the second strip ( 11 ) and arranged so as to cooperate with the cradle ( 16 ), the tab ( 19 ) being able to occupy a first and a second axial position in such a way that the cradle ( 16 ) is locked in one of the indexed positions when the tab ( 19 ) is located in the first axial position thereof, and in such a way that the cradle ( 16 ) is unlocked when the tab ( 19 ) is positioned in the second axial position, in such a way that said cradle ( 16 ) can slide along the walls ( 18 , 8 ′) of the housing ( 17 ) so as to occupy a different indexed position, the cradle ( 16 ) being locked in said different indexed position when the tab ( 19 ) is displaced into the first axial position thereof again, and wherein the tab ( 19 ) is arranged so as to pass through the second strip ( 11 ) and the cradle ( 16 ) from one side to the other in a direction perpendicular to the displacement of said cradle ( 16 ).