Chronograph module equipped with a removable wheel

A chronograph module (1) for a horological movement, the chronograph module (1) comprising a plate and/or a plate bridge, a primary shaft (3) extending along a longitudinal axis about which the primary shaft is rotatable, the primary shaft (3) bearing a primary disk (4) extending a substantially orthogonal plane to the longitudinal axis of the primary shaft (3), the primary shaft (3) being fitted on the plate and/or the plate bridge, such that the primary disk (4) is engaged with a geartrain of the chronograph module (1),

• wherein the chronograph module (1) comprises a removable wheel (2) fitted on the primary shaft (3), the removable wheel (2) comprising a peripheral gear structure, as well as a first (22) and a second elastic arm (23) forming a clamp (30) configured to grip the primary shaft (3), the primary shaft (3) including a radial support surface (25) whereon the first (22) and the second elastic arm (23) are supported, so as to assemble the removable wheel (2) on the primary shaft (3),
• wherein the chronograph module (1) comprises at least one overlapping part disposed in a lower stage of the chronograph module (1), the arrangement and dimensions of the removable wheel (2) in the chronograph module (1) producing an overlap of the removable wheel (2) and said overlapping part, such that the assembly of said overlapping part required the absence of the removable wheel (2) and the presence of the primary shaft (3) in the chronograph module (1), and
• wherein the chronograph module further comprises a secondary shaft (5) and a driving pinion of a chronograph (13) arranged on the secondary shaft (5), a tertiary shaft (8) and a minute counter wheel (9) arranged on the tertiary shaft (8).