Setting device for a minute hand of a timepiece, in particular of a chronograph

A setting device for a minute hand of a timepiece comprising:

• a minute control lever;
• a minute control pawl which is arranged on the minute control lever;
• a minute counter wheel which is mounted rotatably,
• a central arbor for a seconds hand, which central arbor has a plurality of receiving regions;
• a gearwheel which is fixedly connected on the central arbor for driving about the central arbor in a first receiving region;
• a heart-shaped reset to zero mechanism which is fixedly fastened on the central arbor for driving about the central arbor in a second receiving region;
• an eccentric having a finger and a head;
• and
• a release snail cam arranged on the central arbor for driving about the central arbor in a third receiving region and having an opening for receiving the head of the eccentric,
• wherein the release snail cam has a radially encircling control cam which rises in a ramp-like manner between a smallest and a largest radius, and along which a trip-dog of the minute control lever, which is pivotable about a pivot axis, slides under resilient prestress during rotational movement of the release snail cam and, after a sliding distance corresponding to sixty seconds and overcoming a point of largest radius, drops onto a point of smallest radius of the release snail cam,
• wherein by way of the minute control pawl, when the trip-dog of the minute control lever drops onto a point of smallest radius of the control cam, the minute counter wheel is advanced by a minute step, wherein a release point of advancement is set in an adjustable manner by the minute control lever,
• wherein the release snail cam is arranged in an interference fit in the third receiving region of the central arbor, and
• wherein the heart-shaped reset to zero mechanism has an opening for receiving the finger of the eccentric, and by rotation of the head of the eccentric via the heart-shaped reset to zero mechanism sitting fixedly on the central arbor, the release snail cam is rotated by an angle about the central arbor relative to the gearwheel for setting the release point of the advancement by the minute control lever.