Drive unit
AssigneeMiniswys S.A.
InventorsRaphaël Hoesli, Maxime Roten
Life of this patent
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Abstract
A piezoelectric drive unit is configured for driving a passive element relative to an active element, wherein the active element includes a resonator with two arms, each extending in parallel to a reference plane and ending in a contact element, which is movable by oscillating movements of the arms and thereby drives the passive element. Each of the arms has, at the outer end of the arm, a protrusion extending inward, toward the other arm, and on at least one of the arms, the respective contact element, arranged at the arm's outer end, extends outward, away from the other arm.
Claims27
A drive unit for driving a passive element relative to an active element, wherein the active element comprises:
- a resonator and at least one excitation means for exciting oscillations in the resonator,
- the resonator comprising at least two arms extending from a connection region of the resonator at a same side of the connection region,
- the resonator and the arms extending in parallel to a reference plane,
- each of the arms comprising, at an outer end of the arm, a contact element,
- the contact elements being movable via oscillating movements of the arms,
- the passive element being arranged to be driven and moved relative to the active element via the oscillating movements;
- the passive element comprises contact areas, each contact area being arranged to be in contact with a respective one of the contact elements;
- wherein
- each of the arms comprises, at an outer end of the arm, a protrusion extending in a first direction, the first direction being inward, toward an other arm or outward, away from the other arm, and
- on at least one of the arms, the respective contact element arranged at the at least one arm outer end extends in a second direction, the second direction being opposite to the first direction.
A drive unit for driving a passive element relative to an active element, wherein the active element comprises:
- a resonator and at least one excitation means for exciting oscillations in the resonator,
- the resonator comprising a first pair of arms extending from a connection region of the resonator at a same side of the connection region,
- the resonator and the arms extending in parallel to a reference plane,
- each of the arms comprising, at an outer end of the arm, a contact element,
- the contact elements being movable via oscillating movements of the arms,
- the passive element being arranged to be driven and moved relative to the active element by way of these oscillating movements;
- the passive element comprises contact areas, each contact area being arranged to be in contact with a respective one of the contact elements;
- wherein
- the resonator comprises a second pair of arms extending from the connection region of the resonator in the opposite direction as the first pair of arms.
A drive unit for driving a passive element relative to an active element, wherein the active element comprises:
- a resonator and at least one excitation means for exciting oscillations in the resonator,
- the resonator comprising at least two arms extending from a connection region of the resonator at a same side of the connection region,
- the resonator and the arms extending in parallel to a reference plane,
- each of the arms comprising, at an outer end of the arm, a contact element, the contact elements facing outward, away from the other arm,
- the contact elements being movable via oscillating movements of the arms,
- the passive element being arranged to be driven and moved relative to the active element via said oscillating movements;
- the passive element comprises contact areas, each contact area being arranged to be in contact with a respective one of the contact elements;
- wherein the resonator is shaped from a flat piece of material,
- wherein
- between each of the arms and the connection region there is an attachment necking.
A drive unit for driving a passive element relative to an active element, wherein the active element comprises:
- a resonator and at least one excitation means for exciting oscillations in the resonator,
- the resonator comprising at least two arms extending from a connection region of the resonator at a same side of the connection region,
- the resonator and the arms extending in parallel to a reference plane,
- each of the arms comprising, at an outer end of the arm, a contact element,
- the contact elements being movable via oscillating movements of the arms,
- the passive elements being arranged to be driven and moved relative to the active element by said oscillating movements;
- the passive element comprises contact areas, each contact area being arranged to be in contact with a respective one of the contact elements;
- wherein the resonator is shaped from a flat piece of material,
- wherein
- in regions covered by the excitation means, the resonator comprises holes or openings.
Dependencies are inferred from the claim text.