Patent ID: 7360944

Claim:
Control device with decoupling crown for a watch, characterised in that it comprises: a supporting part ( 10 ) intended to be fixed at the watchcase ( 3 ) or consisting of the watchcase ( 3 ) itself, this supporting part ( 10 ) comprising an opening, a drive shaft ( 11 ) extending inside the opening, intended to control at least one function of the watch, and comprising first coupling means ( 15 ), a crown ( 12 ) comprising a crown's head ( 13 ) and a tube ( 14 ) integral with the crown's head ( 13 ), the tube ( 14 ) being mounted rotatably and translatably between the wall ( 10 ′) of the opening and the drive shaft ( 11 ), and comprising second coupling means ( 16 ), and an indexing element ( 18 ) placed into the opening that is integral with the supporting part ( 10 ) or with the tube ( 14 ), and able to cooperate with first and second structures ( 19 , 20 ) provided on the outside of the tube ( 14 ) or a wall ( 10 ′) of the opening in order to define a first axial position of the crown ( 12 ) in which the first and second coupling means ( 15 , 16 ) are engaged and allow the drive shaft ( 11 ) to be rotated when the crown ( 12 ) is rotated, and a second axial position of the crown ( 12 ) in which the tube ( 14 ) is disengaged from the drive shaft ( 11 ).