Coupling device for a chronograph

Abstract

The invention relates to a clutch device for a clock, comprising a clutch input wheel 1 rotatably driven by a clockwork mechanism and arranged on a rotatably driven, axially fixed axle 2, which supports a clutch output wheel in a rotationally fixed manner. A clutch disc 3 of the clutch input wheel 1 is coaxial with the axle 2, and an axially displaceable counter-clutch disc 4 is arranged coaxially with it. The counter-clutch disc 4 is subjected to frictional engagement with the clutch disc 3 by a spring force and can be engaged by a claw 8. The counter-clutch disc 4 can be lifted from the engaged position away from the claw 8 to a disengaged position. The claw 8 can be moved from a manually unactuated position to its actuated position, lifting the counter-clutch disc 4 away from the clutch disc 3, by a manually actuated disengagement button.