Drive device for a display element
AssigneeRolex SA
InventorChristian Fleury
Life of this patent
Estimating the term…
Abstract
A drive device for a display element for displaying a quantity associated with time or derived from time, includes a cam that is pivoted about a first axis and designed to drive the movement of the display element, the cam having 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, wherein an angle (α) is formed, in a plane perpendicular to the first and second axes, between (i) a straight line passing through (a) the contact point between the peak, in particular the point is farthest from the first axis, and the lever, and (b) the first axis, and (ii) a straight line passing through the first axis (A3) and the second axis, the angle (α) is less than or equal to 70°.
Claims19
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.
Dependencies are inferred from the claim text.