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公开(公告)号：US20240210889A1
公开(公告)日：2024-06-27
申请号：US18528864
申请日：2023-12-05
Inventor： Mohammad Hussein KAHROBAIYAN , Yvan FERRI , Alexandre DIDIER , Lionel PARATTE , Jean-Jacques BORN
Abstract: A rotary piezoelectric motor, in particular for a timepiece, the motor including: a rotor configured to rotate and actuate a mechanical device, a stator configured to rotate the rotor, the stator including a piezoelectric actuator, the piezoelectric actuator including a moving element whose movement causes the rotor to rotate in a first direction, the piezoelectric actuator including only two electrically actuatable resonators, the two resonators being connected to the moving element to move it against the rotor to cause it to rotate, the two resonators being arranged relative to the moving element so as to cause the moving element to oscillate in first and second directions different from each other, each resonator including a centre of rotation, the two resonators being disposed relative to the moving element so that, around each centre of rotation, the torque resulting from all the acceleration forces being applied in the plane of each resonator is zero.
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公开(公告)号：US20240210890A1
公开(公告)日：2024-06-27
申请号：US18528940
申请日：2023-12-05
Inventor： Mohammad Hussein KAHROBAIYAN , Yvan FERRI , Alexandre DIDIER , Lionel PARATTE , Jean-Jacques BORN
Abstract: A piezoelectric resonator for a rotary motor, the resonator including a stationary base and an oscillating mass extending around a longitudinal axis, the oscillating mass having an inertia-block. The resonator includes a flexible blade guide connecting the oscillating mass to the base, so as to be able to cause the oscillating mass to oscillate about a centre of rotation in a balance movement, the flexible guide including a first RCC-type pivot provided with an intermediate moving element, a first pair of flexible blades connecting the base to the intermediate moving element, and a second pair of flexible blades forming a second RCC-type pivot connecting the intermediate moving element to the oscillating mass, the piezoelectric resonator including a first flexible blade connecting the intermediate moving element to the base, the first flexible blade including at least in part a piezoelectric material that can deform the first flexible blade and cause the oscillating mass to oscillate.
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Patent Agency Ranking
公开(公告)号：US20240210891A1
公开(公告)日：2024-06-27
申请号：US18528966
申请日：2023-12-05
Inventor： Mohammad Hussein KAHROBAIYAN , Yvan FERRI , Alexandre DIDIER , Lionel PARATTE , Jean-Jacques BORN
Abstract: A piezoelectric resonator, in particular for a rotary piezoelectric motor, the resonator including a stationary base and an oscillating mass extending around a longitudinal axis, the oscillating mass being provided with at least one flyweight, preferably two opposing flyweights, wherein the resonator includes a flexible guide connecting the oscillating mass to the base, so as to be able to cause the oscillating mass to oscillate about a centre of rotation in a pendulum movement, the flexible guide comprising at least a first flexible blade connecting the base to the oscillating mass, the first flexible blade comprising at least in part an electrically actuatable piezoelectric material for deforming the first flexible blade and causing the oscillating mass to oscillate.
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4.发明申请公开(公告)号：US20230044830A1
公开(公告)日：2023-02-09
申请号：US17804667
申请日：2022-05-31
Inventor： Matthias IMBODEN , Alexandre DIDIER , Alexandre HAEMMERLI
Abstract: An horological movement includes an analogue time display, a geartrain, a barrel and an electromechanical oscillator, which is formed of a resonator, including a balance and a piezoelectric balance-spring, and a mechanical escapement, and further includes an electronic control circuit connected to an electrical energy source and arranged to be able to control the application of an electrical voltage on at least one electrode of the piezoelectric balance-spring so as to generate driving electrical pulses for the oscillator. The horological movement is configured such that the barrel is capable, in a first main state, of maintaining alone a functional oscillation of the oscillator with a first amplitude, while in a second main state, the electronic control circuit powers the piezoelectric balance-spring to maintain, partially or fully, the oscillation of the resonator with a second amplitude greater than the first amplitude for any spatial orientation, the second amplitude being preferably constant.
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公开(公告)号：US20240213953A1
公开(公告)日：2024-06-27
申请号：US18541184
申请日：2023-12-15
Inventor： Mohammad Hussein KAHROBAIYAN , Yvan FERRI , Alexandre DIDIER , Lionel PARATTE , Jean-Jacques BORN
Abstract: A piezoelectric resonator, in particular for a rotary piezoelectric motor, the resonator including a stationary base and an oscillating mass extending about a longitudinal axis, the oscillating mass being provided with at least one inertia-block, preferably two opposing inertia-blocks, wherein the resonator includes a flexible blade guide connecting the oscillating mass to the base, so that the oscillating mass can be oscillated about a centre of rotation in a pendulum movement, the flexible guide including at least one first flexible blade connected to the base and/or to the oscillating mass to allow the displacement of the oscillating mass relative to the base, the flexible blade guide including a spiral spring connected to the base and/or to the oscillating mass, the spiral spring including at least partially an electrically actuatable piezoelectric material to deform the spiral spring and oscillate the oscillating mass.
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公开(公告)号：US20230185242A1
公开(公告)日：2023-06-15
申请号：US17939511
申请日：2022-09-07
Inventor： Alexandre DIDIER , François Gueissaz , Elias Laforge
CPC classification number: G04B17/063 , G04B17/066 , G04B17/227
Abstract: The piezoelectric balance spring (3) is provided for a circuit (10) for self-regulating an oscillation frequency of an oscillating mechanical system (2, 3), or an energy recovery circuit or a motor circuit for actuating the movement or for the automatic maintenance thereof. The piezoelectric balance spring (3) comprises at least one piezoelectric layer (7, 7′, 17, 17′, 27, 27′) disposed on a top face (20) or bottom face of a certain number of coils of the spring in a plane, and at least two pairs of electrodes (8a, 8b, 8c, 8d), whereby the electrodes of each pair are disposed on two opposing faces of the same piezoelectric layer or respectively two piezoelectric layers so as to apply a reverse bias voltage on each pair of electrodes.
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公开(公告)号：US20220390901A1
公开(公告)日：2022-12-08
申请号：US17662691
申请日：2022-05-10
Inventor： Matthias IMBODEN , Alexandre HAEMMERLI , Alexandre DIDIER , Cédric NICOLAS
Abstract: A horological movement includes an analogue time display, a gear train, a barrel driving the analogue display via the gear train, and an oscillator formed of a resonator, including a balance and a piezoelectric spring, and a mechanical escapement coupling the balance to the gear train. This horological movement further includes an electric energy source which is associated with the electronic control circuit, which is arranged to be able to control the application of an electrical supply voltage to the piezoelectric spring so as to excite the oscillator to obtain a functional oscillation of the resonator and then to maintain this functional oscillation. The mechanical escapement is configured so as to be an escapement for counting the alternations of the functional oscillation, so as to pace the running of the horological movement, without the resonator being able to receive from the barrel via this mechanical escapement enough mechanical energy to maintain the functional oscillation.
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