Patent ID: 8727606

Claim:
A control mechanism for loading an energy accumulator for a timepiece or a timepiece movement via an intermediate winding mechanism, comprising: said intermediate winding mechanism including a winding stem and a winding-button arranged to drive said stem, at least in translation, wherein said stem is configured to occupy at least an initial longitudinal position for said energy loading, and a portion of the length of said stem is a ringed stem or a threaded stem, said stem is arranged to drive in at least one of rotation and translation a winding driver, when said stem is moved in translation as a result of pressure or respectively traction by a user, in a travel which is limited between said initial longitudinal position and a maximum pushed-in or respectively pulled-out position of said stem, said maximum position being an unstable position, and said stem being returned to said initial position by an elastic return part, wherein said winding driver includes a driving part to drive said intermediate winding mechanism, and wherein said driving part includes a disconnectable intermediate winding wheel to drive a winding train, comprised in said intermediate winding mechanism, said disconnectable intermediate winding wheel being moveable along a travel parallel to that of said stem and remaining permanently meshed with said stem, and wherein said stem is arranged to pivot the disconnectable intermediate winding wheel to drive said driving part of said intermediate winding mechanism, and said disconnectable intermediate winding wheel is moveably mounted and configured to occupy two positions; a gearing position in which said disconnectable intermediate winding wheel is meshed with said driving part when said stem is moved in translation in a first direction of winding as a result of pressure or respectively traction by the user against said elastic return part; and a disengaging position in which the disconnectable intermediate winding wheel is disengaged from said driving part when said stem is moved in translation in a second, return direction opposite to said first winding direction by said elastic return part.