Stopping mechanism for stopping or releasing a horological regulating or chronograph mechanism wheel

A stopping mechanism (100) for triggering the stopping or release of a regulating or chronograph mechanism wheel (1) of a timepiece (1000), including a structure (500) and at least a first bridge (600) on either side of said wheel (1) which is rotatable about a main axis (D), said stopping mechanism (100) including a control organ (210) which can be operated directly or indirectly by a user and linked with a stopping lever (2) which includes at least one support surface (20) arranged to bear on a complementary front and/or edge support surface (11) of said wheel (1), said stopping lever (2) being movable between a working position where any said support surface (20) is at a distance from said complementary support surface (11) and where said wheel (1) is free to rotate, and a stopping position where at least one said support surface (20) is bearing on said complementary support surface (11) and where said wheel (1) is in a rotation stopping position,

• wherein said stopping lever (2) includes, rigidly connected to each other and rotatable together with respect to a pivot axis (DP) parallel with said main axis (D), a first control part (21) which is linked in a removable manner with said control organ (210), at a link axis (DA) parallel with said pivot axis (DP), said removable link allowing a substantially planar extraction or insertion of said first part (21) with respect to said control organ (210), perpendicularly to said link axis (DA), and a second support part (22) including said at least one support surface (20) and which is movable between said structure (500) and said first bridge (600).