Patent ID: 7249398

Claim:
Device for fastening a watch strap to a watch case comprising a hinge pin ( 1 ) integral with the watch case ( 2 ) and extending from the watch case in a first direction, a fastening element ( 3 ) attached to or integrated to an end of said strap provided with two lugs ( 15 ) defining between them a space ( 16 ) to receive the hinge pin ( 1 ), each of these lugs comprising an axial recess ( 17 ) leading to said space, each of said axial recesses ( 17 ) housing an endstone ( 21 ) mounted in a sliding manner in said recess ( 17 ) and bearing a push button ( 20 ) attached to an external end of the endstone ( 21 ), the hinge pin ( 1 ) comprising on a lateral face an annular housing ( 25 ) opening radially outwardly through a groove ( 26 ) in a second direction transverse to said first direction, said annular housing ( 25 ) receiving a protrusion ( 27 ) located on said lugs ( 15 ), whereby, for a user to fasten or remove the watch strap from the watch case, said buttons must be pushed and simultaneously said end of the strap must extend in said second direction and whereby said protrusion can enter or exit said annular housing only through said groove.