Device for rotating a toothed wheel
AssigneeETA SA Manufacture Horlogere Suisse
InventorsPascal Lagorgette, Pascal Meyer
Life of this patent
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Abstract
A device for rotating a toothed wheel, including a linear piezoelectric motor including: a passive element having an elongated shape, a piezoelectric actuator capable of axially moving the passive element in a bidirectional manner, a transmission member fastened to the passive element, meshing with a toothing of the wheel in such a way as to rotate the wheel by one tooth in a first direction of rotation when the passive element is moved axially in a first direction of movement, a jumper mobile between two end positions, including a lowered position in which it blocks a rotation of the wheel in a second direction of rotation opposite to the first direction of rotation.
Claims12
A device for rotating a toothed wheel, comprising:
- a linear piezoelectric motor comprising:
- a passive element having an elongated shape,
- a piezoelectric actuator capable of axially moving the passive element in a bidirectional manner,
- a transmission member fastened to the passive element, meshing with a toothing of the wheel in such a way as to rotate the wheel by one tooth in a first direction of rotation when the passive element is moved axially in a first direction of movement, and
- a jumper mobile between two end positions, including a lowered position wherein the jumper blocks a rotation of the wheel in a second direction of rotation opposite to the first direction of rotation, wherein
- the transmission member meshes with the toothing of the wheel in such a way as to rotate the wheel by one tooth in the second direction of rotation when the passive element is moved axially in a second direction of movement opposite to the first direction of movement, and
- the jumper, in the lowered position, blocks a rotation of the wheel in the first direction of rotation.
Dependencies are inferred from the claim text.