Patent ID: 11899401
Assignee: ROLEX SA
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A drive device for a display element for displaying a quantity associated with time or derived from time, comprising:
a cam that is pivoted about a first axis and designed to drive a movement of the display element, the cam including a peak;
a lever that is pivoted about a second axis, and
a spring that is designed to return the lever into contact with the cam,
an angle (α) is formed, in a plane perpendicular to the first and second axes, between:
a straight line passing through:
a contact point between the peak, the contact point is farthest from the first axis, and the lever, and
the first axis, and

a straight line passing through the first axis and the second axis,
the angle is less than or equal to 65°,
wherein the lever is configured to act on the cam due to the spring to drive the cam.