Adjustable bracelet clasp

Abstract

A clasp for a folding-clasp bracelet, the clasp including a cover to which at least a first blade and a second blade are attached, which blades are hinged together and to which blades a first bracelet strand is attached; a first locking mechanism for holding the blades in the closed position on the cover; an actuator including a first and a second push-pieces; a mechanism for adjusting the length of the bracelet, to which a second bracelet strand is attached. The length adjustment mechanism include an end piece sliding inside the cover, the sliding end piece having a toothed sector arranged to cooperate with a second locking mechanism controlled by a push-piece.

1 . A clasp for a folding-clasp bracelet, the clasp comprising:
 a cover to which at least a first blade and a second blade are attached, which blades are hinged together and to which blades a first bracelet strand is attached;   first locking means for holding the blades in the closed position on the cover;   actuating means comprising a first and a second push-pieces;   means for adjusting the length of the bracelet, to which a second bracelet strand is attached;   wherein the length adjustment means comprise an end piece sliding in a recess formed in the cover, the sliding end piece having a toothed sector arranged to cooperate with second locking means controlled by a push-piece, the end piece being arranged to move from a locked position to an unlocked position in which the sliding end piece is completely disengaged from the cover.   
     
     
         2 . The clasp according to  claim 1 , wherein the locking means comprise a lever pivoting between a locked position and an unlocked position, the lever having a first end arranged to cooperate with one of the push-pieces and a second end having a toothed element arranged to cooperate with the toothed sector of the sliding end piece. 
     
     
         3 . The clasp according to  claim 1 , wherein the locking means comprise elastic return means for holding the lever in the locked position. 
     
     
         4 . The clasp according to  claim 1 , wherein the cover has an overall U-shaped cross-section and is provided with two wings facing each other, each of these wings having an opening to receive the first and second push-pieces. 
     
     
         5 . The clasp according to  claim 1 , wherein the push-pieces have a body and a head, the head of each push-piece resting inside one of the openings and one of the heads being arranged to cooperate with the first end of the lever. 
     
     
         6 . The clasp according to  claim 1 , wherein the body of the push-pieces carries the first locking means of the clasp, the length of the body of each push-piece being predefined in such a way that when the push-pieces are actuated simultaneously, the body of the push-pieces comes into contact and does not disengage the lever. 
     
     
         7 . The clasp according to  claim 1 , wherein the clasp comprises a plate integral with the cover to form a recess between the plate and the cover, the plate having two openings through which the first locking means pass. 
     
     
         8 . The clasp according to  claim 1 , wherein the cover comprises a cavity arranged to receive a spring, the spring cooperating with the sliding end piece. 
     
     
         9 . The clasp according to  claim 4 , wherein the sliding end piece has a machining whose shape complements to the shape of the cavity. 
     
     
         10 . The clasp according to  claim 1 , wherein the clasp comprises stop means preventing the sliding end piece from dislodging from the cover. 
     
     
         11 . The clasp according to  claim 1 , wherein the toothed sector has a plurality of teeth, each tooth defining an indexed position of the sliding end piece. 
     
     
         12 . The clasp according to  claim 1 , wherein the toothed sector comprises teeth of asymmetrical shape, such that a first portion of the tooth is perpendicular to the direction of movement of the sliding end piece, and the second portion of the tooth has a slope. 
     
     
         13 . The clasp according to  claim 11 , wherein the toothed element of the lever has a shape complementary to the asymmetrical shape of the teeth of the toothed sector.